CN109094648B

CN109094648B - Tractor control linkage device

Info

Publication number: CN109094648B
Application number: CN201811064649.4A
Authority: CN
Inventors: 钟海兵; 张甘泉; 潘琴
Original assignee: Jiangsu Changfa Agricultural Equipment Co Ltd
Current assignee: Jiangsu Changfa Agricultural Equipment Co Ltd
Priority date: 2018-09-12
Filing date: 2018-09-12
Publication date: 2024-02-27
Anticipated expiration: 2038-09-12
Also published as: CN109094648A

Abstract

The invention relates to a tractor control linkage device, a lifter control assembly, a handle and a rocker arm, wherein an electric push rod is arranged at the rocker arm; the auxiliary clutch control assembly comprises a handle and a rocker arm, an electric push rod is arranged at the rocker arm, and the auxiliary clutch control rocker arm electric push rod is also connected with a PTO electric push rod conversion relay; a steering linkage change-over switch, provided with a steering-PTO linkage mode switch and a lifting linkage mode switch; the two ends of the steering-PTO linkage mode switch are respectively provided with a first public end and a second public end, the two ends of the steering-PTO lifting linkage mode switch are respectively provided with a third public end and a fourth public end, and a lifting rocker arm travel switch is connected between the second public end and the third public end. The invention realizes linkage control through electromechanical combination, has simple operation, various modes, wide application range, low production cost, economy and practicability.

Description

Tractor control linkage device

Technical Field

The invention relates to the technical field of tractor control linkage structures, in particular to a tractor control linkage device.

Background

For the agricultural implement of mechanized operation, a suspension mechanism is usually installed at the rear part of the tractor, and the hydraulic device controls the action of the suspension mechanism to enable the agricultural implement to be in a lifting or various working position states with different tilling depths, and the power output by the tractor is provided for the agricultural implement to complete various operations.

Existing linkages: the electric control lifter can be realized on the premise of an electric control lifter and a programming controller, the functions cannot be switched, and the mode is single; the other is realized on the premise that the PTO is of an electrically controlled wet clutch structure, and the lifting-PTO linkage function under the control of the mechanical PTO is not involved. Third, pure mechanical connection can't switch between the function, and the mode is single, can not relate to the independent and with promote the mode that the linkage was switched over more, application scope is less, and the power take off of reverse driving cuts off mechanical connection, like this at special operating mode such as fertilization, laxative, inapplicable. Fourth, the mechanical connection is still purely mechanical, the functions cannot be switched, the mode is single, the working modes of independent reversing and linkage switching with the PTO are not involved, the linkage mechanical connection of the same reverse driving lifter is not applicable in special situations such as reversing and hooking, and the application range is still small.

Disclosure of Invention

The invention aims to provide the tractor control linkage device which realizes control in an electromechanical combination mode, is simple to operate, has various modes, high operation efficiency and high safety performance, is more excellent in application range expansion, has low production cost, and is economical and practical.

The technical scheme provided by the invention is as follows:

a tractor steering linkage comprising:

the lifter operation assembly comprises a lifter operation handle and a lifter operation rocker arm, wherein an electric lifter operation rocker arm push rod is arranged at the lifter operation rocker arm;

the shuttle shift operating assembly comprises a shuttle shift operating handle and a shuttle shift operating rocker arm, and is used for controlling the running direction;

the auxiliary clutch control assembly comprises an auxiliary clutch control handle and an auxiliary clutch control rocker arm, wherein the auxiliary clutch control handle is connected with the auxiliary clutch control rocker arm through an auxiliary clutch control stay wire, an auxiliary clutch control rocker arm electric push rod is arranged at the auxiliary clutch control rocker arm, a PTO electric push rod conversion relay A and a PTO electric push rod conversion relay B are respectively arranged on the auxiliary clutch control rocker arm electric push rod, and one end of the auxiliary clutch control rocker arm is connected with the PTO;

a steering linkage change-over switch provided with a steering-PTO linkage mode switch and a steering-PTO-lifting linkage mode switch;

the power supply is characterized in that a first public end and a second public end are respectively arranged at two ends of the steering-PTO linkage mode switch, a third public end and a fourth public end are respectively arranged at two ends of the steering-PTO lifting linkage mode switch, a PTO electric push rod conversion relay A and a PTO electric push rod conversion relay B are connected in parallel to form a fifth public end, the first public end is connected with the power supply, and the second public end is connected with the fifth public end through a lifting rocker arm travel switch.

In this scheme, lift and lowering operations are achieved through conventional lift handling assemblies, while the rocker arm electric pushrods are handled through the provided lifts. The forward and backward setting of the hooking is realized through the shuttle shift operating assembly. The PTO is switched on or off through the auxiliary clutch control assembly, and the PTO electric push rod switching relay A and the PTO electric push rod switching relay B are arranged on the auxiliary clutch control rocker arm electric push rod to realize automatic disconnection of the PTO. More preferably, three control modes of steering independence, steering-PTO linkage and steering-PTO-lifting linkage are realized through setting of a steering linkage change-over switch, and the steering independent, the steering-PTO linkage and the steering-PTO-lifting linkage can be mutually changed over. The method is simple to operate, various in modes, high in operation efficiency, high in safety performance, better in application range expansion, low in production cost, and economical and practical.

Preferably, the electric push rod of the auxiliary clutch control rocker arm is in rolling connection with the side wall of the auxiliary clutch control rocker arm through a first electric push rod roller;

one end of the auxiliary clutch control rocker arm is provided with a waist-shaped hole, the waist-shaped hole is connected with one end of the auxiliary clutch control stay wire, and the other end of the auxiliary clutch control rocker arm is connected with the PTO through a rotating shaft;

And in the electrifying state of the electric push rod of the auxiliary clutch control rocker arm, the first electric push rod roller drives the auxiliary clutch control rocker arm to rotate, and the rotating shaft drives the PTO to be separated from the auxiliary clutch.

In the technical scheme, the first electric push rod roller is in rolling connection with the side wall of the auxiliary clutch operating rocker arm, so that under the condition that the electric push rod of the auxiliary clutch operating rocker arm is electrified, the auxiliary clutch operating rocker arm is pushed to rotate by the first electric push rod roller, and then the disconnection between the auxiliary clutch operating rocker arm and the PTO is realized by the rotating shaft connected with one end of the auxiliary clutch operating rocker arm. Meanwhile, the connection with the auxiliary clutch control pull wire is realized through the arranged waist-shaped hole skillfully, so that the auxiliary clutch control handle is not influenced when the electric push rod of the auxiliary clutch control rocker pushes the auxiliary clutch control rocker. When the electric push rod of the auxiliary clutch control rocker arm does not work, the auxiliary clutch control handle can also normally control the connection and disconnection of the PTO, and can operate under various conditions, so that the design is ingenious and reasonable.

Preferably, the electric push rod of the lifter control rocker arm is in rolling connection with the side wall of the lifter control rocker arm through a second electric push rod roller;

And in the electrified state of the electric push rod of the lifter control rocker arm, the second electric push rod roller pushes the lifter control rocker arm to lift and drives the lifter control handle to lift.

In the technical scheme, the second electric push rod roller is in rolling connection with the side wall of the lifter operating rocker arm, so that automatic control is realized and the operating efficiency is improved under the electrifying state of the lifter operating rocker arm electric push rod.

Preferably, the steering linkage change-over switch is provided with a steering independent mode, a steering-PTO linkage mode and a steering-PTO-lifting linkage mode;

the steering independent mode is as follows: the steering linkage change-over switch is switched in a steering independent mode, is disconnected with the lifter operation assembly and the PTO, lifts the lifter operation handle, the lifter operation rocker arm is triggered, the PTO electric push rod change-over relay A and the PTO electric push rod change-over relay B are electrified and are changed, the auxiliary clutch operation rocker arm is extended after the electric push rod is electrified, the auxiliary clutch operation rocker arm rotates, and the PTO is cut off under the condition that the auxiliary clutch operation rocker arm rotates;

the steering-PTO linkage mode is as follows: the steering linkage change-over switch is in a steering-PTO linkage mode, is linked with the PTO, when in steering, the PTO is disconnected, the steering linkage change-over switch is pulled, the reversing-PTO lifting linkage mode switch is connected, the PTO electric push rod conversion relay A and the PTO electric push rod conversion relay B are electrified and converted, the auxiliary clutch control rocker arm electric push rod is electrified and stretches out, and the auxiliary clutch control rocker arm rotates to cut off the PTO;

The steering-PTO-lift linkage mode is: the steering linkage change-over switch is in a steering-PTO-lifting linkage mode, is mutually linked with the PTO and the lifter operation assembly, the PTO is disconnected, the lifter operation assembly is lifted, the PTO electric push rod change-over relay A and the PTO electric push rod change-over relay B are electrified and changed, the auxiliary clutch operation rocker arm electric push rod is electrically stretched out, and the auxiliary clutch operation rocker arm rotates to cut off the PTO.

In the technical scheme, three control modes of independent steering, steering-PTO linkage and steering-PTO-lifting linkage are realized, the control modes can be mutually switched, the modes are diversified, and the application range is improved.

Preferably, the lifter operating rocker arm electric push rod is respectively connected with a reversing electric push rod conversion relay A and a reversing electric push rod conversion relay B;

the reversing linkage change-over switch is provided with a reversing-PTO linkage mode switch and a reversing-PTO-lifting linkage mode switch;

the reversing-PTO linkage mode switch is characterized in that the first public end and the second public end are respectively arranged at two ends of the reversing-PTO linkage mode switch, and the third public end and the fourth public end are respectively arranged at two ends of the reversing-PTO lifting linkage mode switch.

According to the technical scheme, automatic reversing-PTO-lifting linkage control is realized by controlling a reversing electric push rod conversion relay A and a reversing electric push rod conversion relay B which are arranged on the rocker arm electric push rod through the lifter.

Preferably, the reversing electric push rod conversion relay a and the reversing electric push rod conversion relay B are connected in parallel, and then one end of the reversing electric push rod conversion relay a and the reversing electric push rod conversion relay B form a sixth public end, and the sixth public end is connected with the fourth public end.

Preferably, a reversing travel switch is arranged between the reversing-PTO linkage mode switch and the lifting rocker arm travel switch.

According to the technical scheme, the reversing travel switch can be used for timely and effectively monitoring whether the vehicle is in a forward or reversing state.

Preferably, the reversing linkage change-over switch is provided with a reversing independent mode, a reversing-PTO linkage mode and a reversing-PTO-lifting linkage mode;

the reverse-PTO linkage mode is as follows: the reversing linkage change-over switch is in a reversing-PTO linkage mode, is linked with the PTO and is linked with the lifter operation assembly; when the vehicle is reversed, the PTO is automatically disconnected, the shuttle operating handle is hung to a reverse gear position, the shuttle operating rocker arm is triggered, the PTO electric push rod switching relay A and the PTO electric push rod switching relay B are electrified and switched, the auxiliary clutch operating rocker arm electric push rod is electrically extended, and the auxiliary clutch operating rocker arm rotates to cut off the PTO;

The reverse-PTO-lift linkage mode is as follows: the reversing linkage change-over switch is in reversing-PTO-lifting linkage mode and is mutually linked with the PTO and the lifter operation assembly; when the vehicle is reversed, the PTO is automatically disconnected, the lifter operation assembly is lifted, the shuttle operation handle is hung to a reverse gear position, the shuttle operation rocker arm is triggered, the PTO electric push rod conversion relay A and the PTO electric push rod conversion relay B are electrified and converted, the auxiliary clutch operation rocker arm is electrically stretched out to push the auxiliary clutch operation rocker arm, and the auxiliary clutch operation rocker arm rotates to cut off the PTO.

In the technical scheme, three control modes of independent reversing, reversing-PTO linkage and reversing-PTO-lifting linkage are realized, the control modes can be mutually switched, the modes are diversified, and the application range is improved.

Preferably, the front axle assembly further comprises a front axle right steering limiting plate and a front axle left steering limiting plate, and a right steering travel switch and a left steering travel switch are arranged between the front axle right steering limiting plate and the front axle left steering limiting plate;

the right steering travel switch and the left steering travel switch are connected with the front axle assembly through a travel switch telescopic device.

In the technical scheme, through the right steering limit plate on the front axle assembly and the right steering travel switch and the left steering travel switch which are arranged on the left steering limit plate of the front axle, and through the connection of the travel switch telescopic device and the front axle assembly, the rotation of the rotation direction is detected through the steering travel switch, and the movable distance between the left steering travel switch and the right steering limit plate is changed by adjusting the positions of the left steering travel switch and the right steering travel switch or the positions of the left steering limit plate and the right steering limit plate, so that the steering angle of the left steering travel switch and the right steering travel switch is triggered to be adjusted predictably. For example, in the agricultural operation process, when a large steering angle is needed for operation and the left and right steering travel switches are not required to be triggered for operation and linkage, the movable distance between the left and right steering travel switches and the left and right steering limit plates can be increased, so that the steering angle for triggering the left and right steering travel switches is also increased; and vice versa, when a small steering angle is needed for operation and the left steering travel switch and the right steering travel switch are needed to be triggered for operation and linkage, the movable distance between the left steering travel switch and the right steering travel switch and the left steering limit plate and the right steering limit plate can be reduced, so that the steering angle for triggering the left steering travel switch and the right steering travel switch is also reduced. Finally, the purpose of limiting the steering angle of the trigger travel switch is achieved. And after the steering travel switch is triggered, the normal steering operation is not limited. The purpose is to finally realize automatic disconnection of the PTO by limiting the angle of the steering wheel.

Preferably, the right steering travel switch comprises a right steering travel normally closed switch and a right steering travel normally open switch;

the left steering travel switch comprises a left steering travel normally closed switch and a left steering travel normally open switch;

the right steering travel switch, the left steering travel switch and the steering-PTO linkage mode switch are connected in series and then communicated with the lifting rocker arm travel switch.

And/or;

the travel switch telescopic device is a spiral spring.

In the technical scheme, the travel switch telescopic device is preferably a coil spring, and when steering does not occur, the left steering travel switch and the right steering travel switch do not touch the left steering limiting plate and the right steering limiting plate, so that the initial state of non-steering is maintained; when the front wheel turns along with the steering due to the operation requirement, the piston rods (of the left and right steering limiting plates and the hydraulic oil cylinder 9-3) of the hydraulic oil cylinder 9-3 connected with the front wheel correspondingly push the left and right steering limiting plates to move towards the front side close to the cylinder barrel of the oil cylinder 9-3, so that the distance between the left and right steering limiting plates and the left and right steering travel switches is gradually reduced until triggering (namely contact) occurs; at this time, through the arrangement of the spiral spring in the technical scheme, after the left and right steering limit plates and the left and right steering travel switches are triggered, the spiral spring can also receive certain deformation pressure, so that the steering process still operates normally. When the steering is not needed to be continued, the piston rod of the oil cylinder 9-3 drives the left steering limiting plate and the right steering limiting plate to be gradually far away from the travel switch until the left steering limiting plate and the right steering limiting plate are not contacted any more, and the spiral spring is gradually reset under the action of no continuing to bear pressure and returns to the original state.

In summary, the tractor control linkage structure provided by the invention has the following characteristics:

1. according to the invention, on the basis of the traditional technology of the tractor, the electric push rod is driven by utilizing the logic control principle of the analog circuit, so that the control linkage of the tractor is realized. When steering or reversing is controlled, the travel switch is triggered, the electric push rod is driven to extend, the control rod piece of the related function is pushed, and linkage of the functions controlled by the tractor is realized. When the tractor resumes to turn or go forward, the travel switch is triggered, the electric push rod is driven to retract, the thrust of the control rod piece of the related function is relieved, and the reset of each function of the tractor is realized. The control is effectively realized in an electromechanical combination mode, the operation is simple, the modes are various, the operation efficiency is high, the safety performance is high, the application range is better expanded, the production cost is low, and the method is economical and practical.

2. According to the invention, the right steering travel switch and the left steering travel switch are arranged on the right steering limit plate and the left steering limit plate of the front axle assembly, and are connected with the front axle assembly through the travel switch telescopic device, so that the rotation of the rotation direction is detected by using the steering travel switch, and the position of the steering travel switch is regulated by using the travel switch telescopic device, so that the steering triggering steering travel switch angle is limited. And after the steering travel switch is triggered, the normal steering operation is not limited. The purpose is to limit through the angle of rotation steering wheel, finally realize the automatic disconnection to PTO, improve the security when operating.

3. According to the invention, the connection with the auxiliary clutch control pull wire is realized through the waist-shaped hole arranged at one end of the auxiliary clutch control rocker arm, so that the auxiliary clutch control handle is not influenced when the auxiliary clutch control rocker arm is pushed by the auxiliary clutch control rocker arm electric push rod. When the electric push rod of the auxiliary clutch control rocker arm does not work, the auxiliary clutch control handle can also normally control the connection and disconnection of the PTO, and can operate under various conditions, so that the design is ingenious and reasonable.

4. According to the invention, through setting a plurality of gears of the steering linkage change-over switch, three control modes of steering independence, steering-PTO linkage and steering-PTO-lifting linkage are realized, and the steering linkage change-over switch can be mutually switched. Meanwhile, through the arrangement of a plurality of gears of the reversing linkage change-over switch, three control modes of reversing independence, reversing-PTO linkage and reversing-PTO-lifting linkage are realized, and the control modes can be mutually switched, so that the operation modes are diversified, and the application range is improved.

Drawings

The above features, technical features, advantages and implementation of a tractor steering linkage structure will be further described in a clear and understandable manner by describing preferred embodiments with reference to the accompanying drawings.

FIGS. 1a and 1b are schematic diagrams of a tractor steering linkage in a steering linkage mode and schematic diagrams of circuit logic control;

Fig. 2a and 2b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a steering-PTO linkage state according to the present invention;

fig. 3a and 3b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a steering-PTO-lifting linkage state according to the present invention;

fig. 4a and 4b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a reverse mode state according to the present invention;

fig. 5a and 5b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a reverse-PTO linkage state according to the present invention;

fig. 6a and 6b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a reverse-PTO-lifting linkage state according to the present invention;

fig. 7a and 7b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a lifting automatic power-off PTO state in a steering and reversing combined state according to the present invention;

fig. 8a and 8b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a steering-PTO linkage state in a steering and reversing combination state according to the present invention;

Fig. 9a and 9b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a steering-PTO-lifting linkage state in a steering and reversing combination state according to the present invention;

FIGS. 10a and 10b are schematic diagrams of a tractor steering linkage in a reverse-PTO linkage state in a combined steering and reverse state, and schematic diagrams of circuit logic control;

FIGS. 11a and 11b are schematic diagrams of a tractor steering linkage in a reverse-PTO-lift linkage with a combination of steering and reverse, and schematic diagrams of circuit logic control;

fig. 12a and 12b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a combined state of steering and reversing in a state of steering-PTO linkage and reversing-PTO linkage;

fig. 13a and 13b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a combined state of steering and reversing in a state of steering-PTO-lifting linkage and reversing-PTO linkage;

fig. 14a and 14b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a combined state of steering and reversing in a state of steering-PTO linkage and reversing-PTO-lifting linkage;

Fig. 15a and 15b are schematic structural diagrams and schematic circuit logic control diagrams of a tractor control linkage device in a combined steering and reversing state in a steering-PTO-lifting linkage+reversing-PTO-lifting linkage state;

fig. 16 is a schematic structural view of a front axle assembly in a tractor steering linkage according to the present invention.

Reference numerals illustrate:

a. a first common terminal; b. a second common terminal; c. a third common terminal; d. a fourth common terminal; e. a fifth common terminal; f. a sixth common terminal;

1. a right steering travel switch; 1-1, a right steering travel normally closed switch; 1-2, a right steering travel normally open switch; 1-3, a right steering travel switch telescopic device;

2. a left steering travel switch; 2-1, a left steering travel normally open switch; 2-2, a left steering travel normally closed switch; 2-3, a left steering travel switch telescopic device;

3. an auxiliary clutch control rocker arm electric push rod; 3-1, a first electric push rod roller; 3-2; a rotating shaft;

4. a reversing travel switch;

5. the lifter operates the rocker arm electric push rod; 5-1, a second electric push rod roller;

6. lifting a rocker arm travel switch; 6-1, a lift rocker arm travel normally closed switch; 6-2, a lift rocker arm travel normally open switch;

7. A steering linkage change-over switch; i bit: turning to an independent mode; II bit: steering-PTO linkage mode; III site: a steering-PTO-lift linkage mode;

7-1, steering-PTO linkage mode switch; 7-2, a steering-PTO-lifting linkage mode switch;

8. a reversing linkage change-over switch; IV position: a reverse independent mode; v position: reverse-PTO linkage mode; VI, position: a reverse-PTO-lift linkage mode;

8-1, reversing-PTO linkage mode switch; 8-2, reversing-PTO-lifting linkage mode switch;

9. a front axle assembly; the front axle right steering limiting plate 9-1;9-2, a front axle left steering limiting plate; 9-3, an oil cylinder; 9-4, a piston rod;

10. a secondary clutch operating assembly; 10-1, auxiliary clutch control handles; 10-2, auxiliary clutch operating rocker arm; 10-3, auxiliary clutch control stay wire;

11. shuttle shift operating assembly; shuttle shift lever 11-1; shuttle shift operating rocker arm 11-2;

12. a lifter manipulation assembly; 12-1, lifter control handle; 12-2, lifter manipulation rocker arm;

13. PTO electric push rod conversion relay A;

14. PTO electric push rod conversion relay B;

15. reversing the electric push rod conversion relay A;

16. reversing electric push rod conversion relay B.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention and that other embodiments can be obtained from these drawings by a person skilled in the art without inventive effort.

In a first embodiment of the present invention, referring to fig. 1a-3b, a tractor steering linkage device specifically includes a lifter steering assembly 12, which includes a lifter steering handle 12-1 and a lifter steering rocker 12-2, wherein an electric push rod 5 of the lifter steering rocker 12-2 is disposed at the lifter steering rocker 12-2, so as to implement electromechanical combination control; the shuttle shift operating assembly 11 comprises a shuttle shift operating handle 11-1 and a shuttle shift operating rocker arm 11-2, and is used for controlling the running direction, mainly controlling the vehicle body to move forwards or backwards; the auxiliary clutch control assembly 10 comprises an auxiliary clutch control handle 10-1, an auxiliary clutch control rocker arm 10-2, wherein the auxiliary clutch control handle 10-1 and the auxiliary clutch control rocker arm 10-2 are connected through an auxiliary clutch control pull wire 10-3, meanwhile, an auxiliary clutch control rocker arm electric push rod 3 is arranged at the auxiliary clutch control rocker arm 10-2, a PTO electric push rod conversion relay A13 and a PTO electric push rod conversion relay B14 are further arranged on the auxiliary clutch control rocker arm electric push rod 3 respectively, and one end of the auxiliary clutch control rocker arm 10-2 is connected with the PTO. The purpose is to push the auxiliary clutch control rocker arm 10-2 to rotate through the auxiliary clutch control rocker arm electric push rod 3, and the purpose is automatic; or the auxiliary clutch control handle 10-1 is utilized to pull the auxiliary clutch control rocker arm 10-2 to rotate through the auxiliary clutch control pull wire 10-3, so that the operation is manual. Therefore, connection or disconnection of the PTO can be finally realized no matter the automatic or manual operation is adopted, the operation efficiency is effectively improved, and the operation safety is ensured.

In actual use, the steering linkage change-over switch 7 is also arranged, wherein the steering linkage change-over switch 7 is specifically provided with a steering-PTO linkage mode switch 7-1 and a steering-PTO-lifting linkage mode switch 7-2. The specific connection mode is that a first public end a and a second public end B are respectively arranged at two ends of a steering-PTO linkage mode switch 7-1, a third public end c and a fourth public end d are respectively arranged at two ends of a steering-PTO lifting linkage mode switch 7-2, a PTO electric push rod conversion relay A13 and a PTO electric push rod conversion relay B14 are connected in parallel to form a fifth public end e, the first public end a is used for being connected with a power supply, the second public end B and the fifth public end e are connected with the third public end c through a lifting rocker arm travel switch 6, namely one end of the lifting rocker arm travel switch 6 is arranged between the second public end B and the fifth public end e, the other end of the lifting rocker arm travel switch 6 is connected with the third public end through a lifting rocker arm travel normally closed switch 6-1, and meanwhile the other end of the lifting rocker arm travel switch is connected with the power supply through a parallel lifting rocker arm travel normally open switch 6-2, and the PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay B14 are all used for detecting the position of a lifter control handle 12-1, and specific circuit logic control principle diagrams are shown in figures 1a and 1B.

In the second embodiment of the present invention, an improvement is made on the basis of the first embodiment, and the improvement is that: the electric push rod 3 of the auxiliary clutch control rocker arm is in rolling connection with the side wall of the auxiliary clutch control rocker arm 10-2 through a first electric push rod roller 3-1; one end of the auxiliary clutch control rocker arm 10-2 is provided with a waist-shaped hole, and meanwhile, the waist-shaped hole is connected with one end of the auxiliary clutch control pull wire 10-3, namely, one end of the auxiliary clutch control pull wire 10-3 is arranged in the waist-shaped hole and can move in the waist-shaped hole, so that the auxiliary clutch control handle 10-1 is prevented from being pulled by the auxiliary clutch control pull wire 10-3 when the auxiliary clutch control rocker arm 10-2 rotates, and misjudgment of an operator is avoided. And the other end of the auxiliary clutch operating rocker arm 10-2 is connected with the PTO through a rotating shaft 3-2. In this way, during actual operation, once the electric push rod 3 of the auxiliary clutch control rocker arm is in an electrified state, the first electric push rod roller 3-1 pushes the auxiliary clutch control rocker arm 10-2 to rotate, and the rotating shaft 3-2 drives the PTO to separate from the auxiliary clutch, so that automatic switching of the PTO is realized. Of course, when the electric push rod 3 of the auxiliary clutch control rocker arm does not work, namely in a no-power-on state, the auxiliary clutch control rocker arm 10-2 can be controlled through the auxiliary clutch control handle 10-1, so that the connection and disconnection of the PTO can be realized.

In actual use, under the condition that the electric push rod 5 of the lifter operating rocker arm 12-2 is in rolling connection with the side wall of the lifter operating rocker arm 12-2 through the second electric push rod roller 5-1, once the electric push rod 5 of the lifter operating rocker arm 12-2 is in an electrified state, the second electric push rod roller 5-1 can automatically push the lifter operating rocker arm 12-2 to lift and drive the lifter operating handle 12-1 to lift, so that the lifting efficiency of the lifter is effectively improved, and the operation safety of the lifter is ensured.

In the third embodiment of the present invention, as shown in fig. 16, the improvement is made on the basis of the above two embodiments, and the improvement is that: comprises a front axle assembly 9, wherein the front axle assembly 9 comprises a front axle right steering limiting plate 9-1 and a front axle left steering limiting plate 9-2, and a right steering travel switch 1 and a left steering travel switch 2 are arranged between the front axle right steering limiting plate 9-1 and the front axle left steering limiting plate 9-2. And the right steering travel switch 1 and the left steering travel switch 2 are connected with the front axle assembly 9 through travel switch telescopic devices, namely a right steering travel switch telescopic device 1-3 and a left steering travel switch telescopic device 2-3. See fig. 1 a-16.

The travel switch telescopic device is a spiral spring, so that one end of the spiral spring can be used for being connected with the steering travel switch, and the other end of the spiral spring is used as a contact for triggering the travel switch. The travel switch telescopic device is preferably a coil spring, and when no steering occurs, the travel switch does not touch the limiting plate, so that the initial state of non-steering is maintained; when the steering wheel is required to be rotated due to operation and the front wheel turns along with the front wheel, a piston rod 9-4 (of the limiting plate and the hydraulic oil cylinder 9-3) of the hydraulic oil cylinder 9-3 connected with the front wheel correspondingly pushes the limiting plate to move towards the front side close to the cylinder barrel of the oil cylinder 9-3, so that the distance between the limiting plate and the travel switch is gradually reduced until triggering (contact) occurs; at this time, through the arrangement of the spiral spring in the technical scheme, the spring can also receive certain deformation pressure after the limit plate and the travel switch are triggered, so that the steering process still operates normally. When the steering is not required to be continued, the piston rod 9-4 of the oil cylinder 9-3 drives the limiting plate to be gradually far away from the travel switch until the limiting plate is not contacted any more, and the spring is gradually reset under the action of no continuing to bear pressure and returns to the original state.

When in actual use, the right steering travel switch 1 comprises a right steering travel normally closed switch 1-1 and a right steering travel normally open switch 1-2; the left steering travel switch 2 comprises a left steering travel normally closed switch 2-2 and a left steering travel normally open switch 2-1; specifically, the right steering travel switch 1, the left steering travel switch 2 and the steering-PTO linkage mode switch 7-1 are connected in series, and are communicated with the lifting rocker arm travel switch 6 after being connected.

The steering independent mode, the steering-PTO linkage mode, and the steering-PTO-lifting linkage mode are set by the steering linkage change-over switch 7 in the first to third embodiments, and the state and the circuit logic control principle in actual operation are specifically as follows:

1. in the lift automatic shut-off PTO state, see fig. 1a, 1 b:

pulling a lifter control handle 12-1 to a lifting position, triggering a lifting rocker arm travel switch 6 by a lifter control rocker arm 12-2, enabling the lifting rocker arm travel normally-closed switch 6-1 to be disconnected, enabling the lifting rocker arm travel normally-open switch 6-2 to be conducted, enabling a PTO electric push rod conversion relay A13 and a PTO electric push rod conversion relay B14 to be electrified and converted, enabling an auxiliary clutch control rocker arm electric push rod 3 to obtain electricity, enabling a first electric push rod idler wheel 3-1 to extend to push an auxiliary clutch control rocker arm 10-2, separating auxiliary clutch to cut off PTO, and achieving the purpose that the lifter is lifted and automatically cuts off PTO.

2. In the steering-PTO linkage state, see fig. 2a, 2 b:

pulling the steering linkage change-over switch 7 to II positions: steering-PTO linkage mode. The steering-PTO coordinated mode switch 7-1 is turned on. The front axle right steering limit plate 9-1 is used for triggering the right steering travel switch 1 to turn on the right steering travel normally closed switch 1-1, the right steering travel normally closed switch 1-1 is turned off, the right steering travel normally open switch 1-2 is turned on, and the right steering travel switch telescopic device 1-3 is used for enabling the right steering travel switch 1 to move rightwards along with the front axle right steering limit plate 9-1, so that normal steering is not influenced. The PTO device electric push rod conversion relay A13 and the PTO electric push rod conversion relay 14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out and pushes the auxiliary clutch control rocker arm 10-2, the auxiliary clutch is separated, the PTO is cut off, and the purpose of steering-PTO linkage is achieved.

3. In the steering-PTO-hoisting linkage state, see fig. 3a, 3 b:

and 7 III bits of a pulling steering linkage change-over switch: steering-PTO-lift linkage mode. The steering-PTO linkage mode switch 7-1 and the steering-PTO-lifting linkage mode switch 7-2 are conducted. The right steering (or left steering) limit plate 9-1 of the front axle triggers the right steering travel switch 1 to turn off the right steering travel normally closed switch 1-1, the right steering travel normally open switch 1-2 is turned on, and the right steering travel switch telescopic device 1-3 enables the right steering travel switch 1 to move rightwards along with the right steering limit plate 9-1 of the front axle, so that normal steering is not influenced. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay 14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out to push the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The reversing electric push rod conversion relay A15 and the reversing electric push rod conversion relay B16 are electrified and converted, the lifter operating rocker arm electric push rod 5 is electrified to extend out of the second electric push rod roller 5-1 to push the lifter operating rocker arm 12-2, and the lifter is lifted. The purpose of the steering-PTO-lifting linkage is achieved.

In the fourth embodiment of the present invention, referring to fig. 4a-6B, a further improvement is made on the basis of the above three embodiments, in which a reverse electric putter conversion relay a15 and a reverse electric putter conversion relay B16 are connected to the electric putter 5 of the lifter operation rocker arm 12-2, respectively, so that electromechanical combination control is achieved. The reversing linkage change-over switch is provided with a reversing-PTO linkage mode switch 8-1 and a reversing-PTO-lifting linkage mode switch 8-2. The specific connection mode is that a first public end a and a second public end B are respectively arranged at two ends of a reversing-PTO linkage mode switch 8-1, a third public end c and a fourth public end d are respectively arranged at two ends of a reversing-PTO lifting linkage mode switch 8-2, a PTO electric push rod conversion relay A13 and a PTO electric push rod conversion relay B14 are connected in parallel to form a fifth public end e, the first public end a is used for being connected with a power supply, the second public end B, the fifth public end e and the third public end c are connected through a lifting rocker arm travel switch 6, namely one end of the lifting rocker arm travel switch 6 is arranged between the second public end B and the fifth public end e, the other end of the lifting rocker arm travel switch 6 is connected with the third public end through a lifting rocker arm travel normally closed switch 6-1, and meanwhile the lifting rocker arm travel switch 6-2 which is connected with the power supply in parallel are used for detecting the position of a lifter control handle 12-1, and specific circuit logic control principle diagrams are shown in figures 4a and 4B.

The reversing electric push rod conversion relay A15 and the reversing electric push rod conversion relay B16 are arranged in parallel, and then one end of the reversing electric push rod conversion relay A and one end of the reversing electric push rod conversion relay B16 are connected in parallel to form a sixth public end f, and the sixth public end is connected with the fourth public end in actual use. In this way, under the condition that the electric push rod 5 of the lifter operating rocker arm 12-2 is in rolling connection with the side wall of the lifter operating rocker arm 12-2 through the second electric push rod roller 5-1, once the electric push rod 5 of the lifter operating rocker arm 12-2 is in an electrified state, the second electric push rod roller 5-1 can automatically push the lifter operating rocker arm 12-2 to lift and drive the lifter operating handle 12-1 to lift, so that the lifting efficiency of the lifter is effectively improved, and the operation safety of the lifter is ensured.

In the fifth embodiment of the present invention, an improvement is made on the basis of the fourth embodiment, and the improvement is that: a reversing travel switch 4 is further arranged between the reversing-PTO linkage mode switch 8-1 and the lifting rocker arm travel switch 6. In this way, the travel direction command executed by the shuttle operating assembly 11 can be detected effectively in time by the reverse travel switch 4.

In the fourth and fifth embodiments, the reverse linkage change-over switch 8 is provided with three gears of a reverse independent mode, a reverse-PTO linkage mode and a reverse-PTO-lifting linkage mode. The specific state and circuit logic control principle in actual operation are as follows:

1. In the lift automatic shut-off PTO state, see fig. 4a, 4 b:

pulling 12-1 and a lifter operating handle to a lifting position, triggering 6 and a lifting rocker arm travel switch by 12-2 and a lifter operating rocker arm, disconnecting the 6-1 and the lifting rocker arm travel normally closed switch, switching on the 6-2 and the lifting rocker arm travel normally open switch, switching on 13 and a PTO electric push rod switching relay A13 and a PTO electric push rod switching relay B14, enabling the auxiliary clutch operating rocker arm electric push rod 3 to obtain electricity, enabling a first electric push rod roller 3-1 to extend to push an auxiliary clutch operating rocker arm 10-2, and separating the auxiliary clutch to cut off the PTO. The purpose of automatic cutting off of PTO by lifting of the lifter is achieved.

2. In the reverse-PTO linkage state, see fig. 5a, 5 b:

pulling the reversing linkage change-over switch 8 to V positions: reverse-PTO linkage mode. The reverse-PTO coordinated mode switch 8-1 is turned on. The shuttle operating handle 11-1 is hung to the reverse position, and the shuttle operating rocker 11-2 triggers the reversing travel switch 4 to be turned on. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay 14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out to push the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The purpose of reversing-PTO linkage is achieved.

3. In the reverse-PTO-lift linkage state, see fig. 6a, 6 b:

pulling the reversing linkage change-over switch 8 to VI positions: reverse-PTO-lift linkage mode. The reverse-PTO linkage mode switch 8-1 and the reverse-PTO-lifting linkage mode switch 8-2 are conducted. The shuttle operating handle 11-1 is hung to the reverse position, and the shuttle operating rocker 11-2 triggers the reversing travel switch 4 to be turned on. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay 14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out to push the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The reversing electric push rod conversion relay A15 and the reversing electric push rod conversion relay B16 are electrified and converted, the lifter operating rocker arm electric push rod 5 is electrified to extend out of the second electric push rod roller 5-1 to push the lifter operating rocker arm 12-2, and the lifter is lifted. The purpose of reversing-PTO-lifting linkage is achieved.

It should be noted that, when the reverse linkage switch 8 is in the iv position, the reverse independent mode is not linked with the lifter operation assembly 12 and the PTO, and is not different from the conventional reverse gear, and therefore, an exemplary description is not given here.

In a sixth embodiment of the present invention, referring to fig. 7a-15B, combining the first to fifth embodiments, specifically comprising a lifter operation assembly 12 including a lifter operation handle 12-1 and a lifter operation rocker 12-2, arranging a lifter operation rocker 12-2 electric putter 5 at the lifter operation rocker 12-2, and connecting a reverse electric putter conversion relay a15 and a reverse electric putter conversion relay B16 to the lifter operation rocker 12-2 electric putter 5, respectively, thereby realizing electromechanical combination control; the shuttle shift operating assembly 11 comprises a shuttle shift operating handle 11-1 and a shuttle shift operating rocker arm 11-2, and is used for controlling the running direction, mainly controlling the vehicle body to move forwards or backwards; the auxiliary clutch control assembly 10 comprises an auxiliary clutch control handle 10-1, an auxiliary clutch control rocker arm 10-2, wherein the auxiliary clutch control handle 10-1 and the auxiliary clutch control rocker arm 10-2 are connected through an auxiliary clutch control pull wire 10-3, meanwhile, an auxiliary clutch control rocker arm electric push rod 3 is arranged at the auxiliary clutch control rocker arm 10-2, further, a PTO electric push rod conversion relay A13 and a PTO electric push rod conversion relay B14 are respectively arranged at two ends of the auxiliary clutch control rocker arm electric push rod 3, and one end of the auxiliary clutch control rocker arm 10-2 is connected with a PTO. The purpose is to push the auxiliary clutch control rocker arm 10-2 to rotate through the auxiliary clutch control rocker arm electric push rod 3, and the purpose is automatic; or the auxiliary clutch control handle 10-1 is utilized to pull the auxiliary clutch control rocker arm 10-2 to rotate through the auxiliary clutch control pull wire 10-3, so that the operation is manual. Therefore, connection or disconnection of the PTO can be finally realized no matter the automatic or manual operation is adopted, the operation efficiency is effectively improved, and the operation safety is ensured.

In actual use, the steering linkage change-over switch 7 is also arranged, wherein the steering linkage change-over switch 7 is specifically provided with a steering-PTO linkage mode switch 7-1 and a steering-PTO-lifting linkage mode switch 7-2; the reversing linkage change-over switch 8 is specifically provided with a reversing-PTO linkage mode switch 8-1 and a reversing-PTO-lifting linkage mode switch 8-2. The specific connection mode is that a first public end a and a second public end B are formed after a steering-PTO linkage mode switch 7-1 and a reversing-PTO linkage mode switch 8-1 are connected in parallel, a third public end c and a fourth public end d are formed after a steering-PTO-lifting linkage mode switch 7-2 and a reversing-PTO-lifting linkage mode switch 8-2 are connected in parallel, a fifth public end e is formed after a PTO electric push rod conversion relay A13 and a PTO electric push rod conversion relay B14 are connected in parallel, the first public end a is used for being connected with a power supply, the second public end B, the fifth public end e and the third public end c are connected through a lifting rocker arm travel switch 6, namely one end of the lifting rocker arm travel switch 6 is arranged between the second public end B and the fifth public end e, the other end of the lifting rocker arm travel switch 6 is connected with the third public end through a lifting rocker arm travel normally closed switch 6-1, meanwhile, the other end of the lifting rocker arm travel switch is connected with the power supply through a parallel lifting rocker arm travel normally open switch 6-2, and the connecting mode is used for detecting the position of a lifter control handle 12-1, and the specific logic control diagram is shown in figures 7a and 7B.

In the sixth embodiment, the steering linkage switch 7 is combined with the reversing linkage switch 8, and the state and the circuit logic control principle during actual operation are specifically as follows:

1. in the lift automatic shut-off PTO state, see fig. 7a, 7 b:

the steering linkage change-over switch 7 is switched to the I position, and is in a steering independent mode and is not linked with the lifter operation assembly 12 and the PTO. The lifter operating handle 12-1 is pulled to a lifting position, at the moment, the lifter operating rocker 12-2 is triggered, the lifting rocker travel switch 6 is turned off, the lifting rocker travel normally-closed switch 6-1 is turned on, the lifting rocker travel normally-open switch 6-2 is turned on, the PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay B14 are electrified and converted, the auxiliary clutch operating rocker electric push rod 3 stretches out after being electrified, the first electric push rod idler wheel 3-1 pushes the auxiliary clutch operating rocker 10-2 to rotate, the rotating shaft 3-2 is driven to rotate under the condition that the auxiliary clutch operating rocker 10-2 rotates, and meanwhile, the purpose of separating auxiliary clutch to cut off PTO is achieved, so that the lifter is lifted to automatically cut off PTO is achieved.

2. In the steering-PTO linkage state, see fig. 8a, 8 b:

when the steering linkage change-over switch 7 is in the II position, the steering-PTO linkage mode is realized, and the steering-PTO linkage change-over switch is only in linkage with the PTO and is not in linkage with the lifter operation assembly 12. When the steering wheel is turned to a certain angle, namely steering, the linkage device can be controlled to automatically disconnect the PTO. Pulling the steering linkage change-over switch 7 to II positions: steering-PTO linkage mode. The reversing-PTO linkage mode switch 8-1 is conducted, and the front axle right steering limiting plate 9-1 is enabled to trigger the right steering travel switch 1 to disconnect the right steering travel normally-closed switch 1-1, the right steering travel normally-open switch 1-2 is conducted, and the right steering travel switch telescopic device 1-3 enables the right steering travel switch 1 to move rightwards along with the front axle right steering limiting plate 9-1, so that normal steering is not affected. The PTO device electric push rod conversion relay A, PTO electric push rod conversion relay B is electrified and converted, at the moment, the auxiliary clutch control rocker arm electric push rod 3 is electrically extended, the first electric push rod roller 3-1 pushes the auxiliary clutch control rocker arm 10-2, the rotating shaft 3-2 is driven to rotate under the condition that the auxiliary clutch control rocker arm 10-2 rotates, and meanwhile, the purpose of separating auxiliary clutch to cut off PTO and achieving steering-PTO linkage is achieved.

3. In the steering-PTO-hoisting linkage state, see fig. 9a, 9 b:

when the steering linkage change-over switch 7 is at the III position, the steering linkage change-over switch is in a steering-PTO-lifting linkage mode and is mutually linked with the PTO and the lifter operation assembly 12. When the steering wheel is turned to an angle (i.e., steered), the steerable linkage automatically disconnects the PTO and causes the riser operating assembly 12 to lift. And 7 III bits of a pulling steering linkage change-over switch: steering-PTO-lift linkage mode. The reverse-PTO lifting linkage mode switch and the reverse-PTO lifting linkage mode switch 8-2 are conducted. The right steering (or left steering) is performed, so that the front axle right steering limiting plate 9-1 is triggered, the right steering travel switch 1 is used for switching off the right steering travel normally-closed switch 1-1, the right steering travel normally-open switch 1-2 is switched on, and the right steering travel switch telescopic device 1-3 is used for enabling the right steering travel switch 1 to move rightwards along with the front axle right steering limiting plate 9-1, so that normal steering cannot be influenced. At this time, the PTO electric putter converting relay A, PTO electric putter converting relay B is switched on, the auxiliary clutch operating rocker arm electric putter 3 is extended electrically, the first electric putter roller 3-1 pushes the auxiliary clutch operating rocker arm 10-2, and the rotating shaft 3-2 is driven to rotate under the condition that the auxiliary clutch operating rocker arm 10-2 rotates, so that the separation auxiliary clutch is realized to cut off the PTO. In the reversing state, the reversing electric push rod conversion relay A15 and the reversing electric push rod conversion relay B16 are electrified and converted, the electric push rod 5 of the lifter control rocker arm 12-2 is electrified and stretches out, the second electric push rod roller 5-1 pushes the lifter control rocker arm 12-2 to lift, and the purpose of steering-PTO-lifting linkage is achieved.

4. In the reverse-PTO linkage state, see fig. 10a, 10 b:

when the reverse linkage change-over switch 8 is in the V position, the reverse-PTO linkage mode is realized, and the reverse linkage change-over switch is only in linkage with the PTO and is not in linkage with the lifter operation assembly 12. When reversing, the linkage can be controlled to automatically disconnect the PTO. The specific pulling reversing linkage change-over switch 8 to V positions: reverse-PTO linkage mode. The reverse-PTO coordinated mode switch 8-1 is turned on. The shuttle operating handle 11-1 is hung to the reverse position, and the shuttle operating rocker 11-2 triggers the reversing travel switch 4 to be turned on. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay B14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified to extend out of the first electric push rod roller 3-1 to push the auxiliary clutch control rocker arm 10-2, the rotating shaft 3-2 is driven to rotate under the condition that the auxiliary clutch control rocker arm 10-2 rotates, and meanwhile, the purpose of separating auxiliary clutch to cut off PTO and achieving reverse-PTO linkage is achieved.

5. In the reverse-PTO-lift linkage state, see fig. 11a, 11 b:

when the reversing linkage change-over switch 8 is in the VI position, the reversing-PTO-lifting linkage mode is adopted, and the reversing-PTO-lifting linkage change-over switch is mutually linked with the PTO and the lifter operation assembly 12. When reversing, the steerable linkage automatically disconnects the PTO and lifts the riser handling assembly 12. Pulling the reversing linkage change-over switch 8 to VI positions: reverse-PTO-lift linkage mode. The reversing-PTO lifting linkage mode switch and the reversing-PTO lifting linkage mode switch are conducted. The shuttle operating handle 11-1 is hung to the reverse position, and the shuttle operating rocker 11-2 triggers the reversing travel switch 4 to be turned on. The PTO electric push rod conversion relay A, PTO is powered on and converted by the electric push rod conversion relay B, the auxiliary clutch control rocker arm electric push rod 3 is electrically extended out of the first electric push rod roller 3-1 to push the auxiliary clutch control rocker arm 10-2, the rotating shaft 3-2 is driven to rotate under the condition that the auxiliary clutch control rocker arm 10-2 rotates, and meanwhile separation auxiliary clutch cut-off PTO is realized. The reversing electric push rod conversion relay A15 and the reversing electric push rod conversion relay B16 are electrified and converted, the lifter control rocker 12-2 and the electric push rod 5 stretch out of the second electric push rod roller 5-1 to push the lifter control rocker 12-2, and the lifter control assembly 12 is lifted, so that the purpose of reversing-PTO-lifting linkage is achieved.

6. In the state of steering-PTO linkage and reversing-PTO linkage, see FIGS. 12a and 12 b;

pulling the steering linkage change-over switch 7 to the II position, and pulling the reversing linkage change-over switch 8 to the V position: steering-PTO linkage and reversing-PTO linkage combined mode. The steering-PTO linkage mode switch 7-1 and the reverse-PTO linkage mode switch 8-1 are simultaneously conducted. At this time, both steering and reversing can be realized, and the PTO can be linked.

The front axle right steering limit plate 9-1 is used for triggering the right steering travel switch 1 to turn on the right steering travel normally closed switch 1-1, the right steering travel normally closed switch 1-1 is turned off, the right steering travel normally open switch 1-2 is turned on, and the right steering travel switch telescopic device 1-3 is used for enabling the right steering travel switch 1 to move rightwards along with the front axle right steering limit plate 9-1, so that normal steering is not influenced. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay B14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out and pushes the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The purpose of the steering-PTO linkage is achieved.

The reverse gear is connected with the shuttle shift operating handle 11-1 to the reverse gear position in a hanging way, and the shuttle shift operating rocker arm 11-2 triggers the reverse travel switch 4 to be conducted. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay 14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out to push the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The purpose of reversing-PTO linkage is achieved.

7. The steering-PTO-lift linkage + reverse-PTO linkage, see FIGS. 13a, 13 b;

and pulling the steering linkage change-over switch 7 III, and pulling the reversing linkage change-over switch 8 to V: and a steering-lifting-PTO linkage and reversing-PTO linkage combined mode. The steering-PTO linkage mode switch 7-1, the steering-PTO-lifting linkage mode switch 7-2 and the reversing-PTO linkage mode switch 8-1 are simultaneously conducted. At the moment, the power transmission device can realize linkage with the PTO whether steering or reversing; steering can be achieved in conjunction with the lift-PTO.

The front axle right steering limit plate 9-1 is used for triggering the right steering travel switch 1 to turn on the right steering travel normally closed switch 1-1, the right steering travel normally closed switch 1-1 is turned off, the right steering travel normally open switch 1-2 is turned on, and the right steering travel switch telescopic device 1-3 is used for enabling the right steering travel switch 1 to move rightwards along with the front axle right steering limit plate 9-1, so that normal steering is not influenced. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay B14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out and pushes the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The reversing electric push rod conversion relay A15 and the reversing electric push rod conversion relay B16 are electrified and converted, the lifter operating rocker arm electric push rod 5 is electrified to extend out of the second electric push rod roller 5-1 to push the lifter operating rocker arm 12-2, and the lifter is lifted. The purpose of the steering-PTO-lifting linkage is achieved.

8. In the state of steering-PTO linkage + reversing-PTO-lifting linkage, see FIGS. 14a, 14 b;

pulling the steering linkage change-over switch 7 to II positions, and pulling the reversing linkage change-over switch 8 to VI positions: steering-PTO linkage and reversing-PTO-lifting linkage combined mode. The steering-PTO linkage mode switch 7-1 is simultaneously conducted with the reversing-PTO linkage mode switch 8-1 and the reversing-PTO-lifting linkage mode switch 8-2. At the moment, the power transmission device can realize linkage with the PTO whether steering or reversing; reversing can realize linkage with the lifting-PTO.

The reverse gear is connected with the shuttle shift operating handle 11-1 to the reverse gear position in a hanging way, and the shuttle shift operating rocker arm 11-2 triggers the reverse travel switch 4 to be conducted. The PTO electric push rod conversion relay A13 and the PTO electric push rod device conversion relay 2 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out to push the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The reversing electric push rod conversion relay A15 and the reversing electric push rod conversion relay B16 are electrified and converted, the lifter operating rocker arm electric push rod 5 is electrified to extend out of the second electric push rod roller 5-1 to push the lifter operating rocker arm 12-2, and the lifter is lifted. The purpose of reversing-PTO-lifting linkage is achieved.

9. steering-lifting-PTO linkage + reversing-lifting-PTO linkage, see FIGS. 15a, 15 b;

and pulling the steering linkage change-over switch 7 III, and pulling the reversing linkage change-over switch 8 to VI: and a combined mode of steering-lifting-PTO linkage and reversing-lifting-PTO linkage. The steering-PTO linkage mode switch 7-1 and the steering-PTO-lifting linkage mode switch 7-2 are simultaneously conducted with the reversing-PTO linkage mode switch 8-1 and the reversing-PTO-lifting linkage mode switch 8-2. At this time, both steering and reversing can be realized, and the lifting-PTO linkage can be realized.

The reverse gear is connected with the shuttle shift operating handle 11-1 to the reverse gear position in a hanging way, and the shuttle shift operating rocker arm 11-2 triggers the reverse travel switch 4 to be conducted. The PTO electric push rod conversion relay A13 and the PTO electric push rod conversion relay 14 are electrified and converted, the auxiliary clutch control rocker arm electric push rod 3 is electrified, the first electric push rod roller 3-1 stretches out to push the auxiliary clutch control rocker arm 10-2, and the auxiliary clutch is separated to cut off the PTO. The reversing electric push rod conversion relays A15 and 16 and the reversing electric push rod conversion relay 2 are electrified and converted, the lifter operating rocker arm electric push rod 5 is electrified to extend out of the second electric push rod roller 5-1 to push the lifter operating rocker arm 12-2, and the lifter is lifted. The purpose of reversing-PTO-lifting linkage is achieved.

It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A tractor steering linkage, comprising:

2. The tractor steering linkage of claim 1, wherein:

the auxiliary clutch control rocker arm electric push rod is in rolling connection with the side wall of the auxiliary clutch control rocker arm through a first electric push rod roller;

3. The tractor steering linkage of claim 1, wherein:

the electric push rod of the lifter control rocker arm is in rolling connection with the side wall of the lifter control rocker arm through a second electric push rod roller;

4. A tractor steering linkage as claimed in any one of claims 1 to 3, wherein:

the steering linkage change-over switch is provided with a steering independent mode, a steering-PTO linkage mode and a steering-PTO-lifting linkage mode;

5. The tractor steering linkage of claim 1, wherein:

the lifter operating rocker arm electric push rod is respectively connected with a reversing electric push rod conversion relay A and a reversing electric push rod conversion relay B;

6. The tractor steering linkage of claim 5, wherein:

and one end of the reversing electric push rod conversion relay A and one end of the reversing electric push rod conversion relay B are connected in parallel to form a sixth public end, and the sixth public end is connected with the fourth public end.

7. The tractor steering linkage of claim 5, wherein:

and a reversing travel switch is arranged between the reversing-PTO linkage mode switch and the lifting rocker arm travel switch.

8. The tractor steering linkage of any one of claims 5-7, wherein:

the reversing linkage change-over switch is provided with a reversing independent mode, a reversing-PTO linkage mode and a reversing-PTO-lifting linkage mode;

9. The tractor steering linkage of claim 1, wherein:

the front axle assembly comprises a front axle right steering limiting plate and a front axle left steering limiting plate, and a right steering travel switch and a left steering travel switch are arranged between the front axle right steering limiting plate and the front axle left steering limiting plate;

10. The tractor steering linkage of claim 9, wherein:

The right steering travel switch comprises a right steering travel normally closed switch and a right steering travel normally open switch;

the right steering travel switch, the left steering travel switch and the steering-PTO linkage mode switch are connected in series and then communicated with the lifting rocker arm travel switch;

and/or;

the travel switch telescopic device is a spiral spring.