CN116255439A - A push rod device for open-window plastic nuts - Google Patents

Abstract

The invention provides a pusher device for a hollowed-out plastic nut, which relates to the technical field of pusher devices, and includes an assembly case, a screw rod, a plastic nut and a metal pipe. One end of the rod is rotatably set on the assembly shell, the screw is driven and set by a deceleration drive mechanism, the plastic nut is screw-rotatably set on the outside of the screw, and the metal tube is set on the outside of the plastic nut. The screw rod is driven to rotate by a deceleration drive mechanism, which drives the plastic nut to perform reciprocating linear motion on the screw rod. Hollow grooves are provided on the outside of the plastic nut, and multiple plastic nuts can be spliced. In the present invention, a plurality of plastic nuts are provided, and uniform hollow grooves are arranged on the outside of the plastic nuts, so that when the plastic nuts are heated or deformed by cold, they can be squeezed into the hollow grooves to increase the expansion space of the plastic nuts.

Description

A push rod device for open-window plastic nuts

technical field

The invention relates to the technical field of push rod devices, in particular to a push rod device for a hollowed-out plastic nut.

Background technique

The technology of using solar power generation devices to generate electricity is becoming more and more common around the world. In order to maximize the utilization of solar energy by solar power generation devices, the existing technology uses solar tracking brackets to realize solar sails in solar power generation devices. The plate follows the different spatial angle positions of the sun to carry out real-time adjustment of lifting and (or) angle, while the lifting and (or) angle adjustment function of the solar tracking bracket is realized by using a push rod device. Due to the harsh outdoor environment where the solar power generation device is used, it usually needs to withstand the ambient temperature of -30°C to 70°C to work, and the solar power generation device needs to work in strong winds, and the wind force exerts a large force on the solar power generation device. Therefore, there are strict requirements for the use of push rod devices, requiring each set of push rod devices to be able to withstand a static load of not less than 3 tons, and at the same time need to meet a dynamic load of not less than 1 ton.

In order to meet the requirement that the solar tracking bracket can work normally at an ambient temperature of -30°C to 70°C, and can withstand a static load of not less than 3 tons and a dynamic load of not less than 1 ton, and the working life is not less than 5000 hours. The push rod device located in the lifting and (or) angle adjustment function of the solar tracking bracket, its design service life is required to achieve the lifting and (or) angle adjustment of more than 10,000 cycles, in which the screw and the nut play a crucial role In order to reduce the wear of the screw and the nut during the reciprocating spiral movement, the screw is usually made of metal, but the nuts are usually made of copper nuts and plastic nuts.

For copper nuts, there are the following advantages: 1. Copper nuts are used in severe temperature environments with large temperature changes, and have high strength and can withstand large static and dynamic loads; 2. Copper nuts have a small linear expansion coefficient. There will be no problem of axial swelling when the ambient temperature rises and falls. However, the disadvantage of copper nuts is that copper nuts have poor self-lubricating ability when used in severe temperature environments with large temperature changes. Under a dynamic load of 1 ton, taking the lifting distance of copper nuts as an example, the lifting times are less than 150 times. Just must add lubricating grease frequently and could guarantee that it and the screw mandrel carry out the smooth motion of screw transmission process. If the lifting times without adding lubricating grease reaches about 200 times, the screw rod will completely wear the copper nut, causing the entire push rod device to lose its working ability. Generally, there are tens of thousands of push rod devices in a solar farm, and frequent filling of lubricating grease requires huge cost, manpower and material resources.

The advantages of plastic nuts are that they have good self-lubricating properties, and the lubrication of the entire life cycle can be satisfied by adding lubricating grease once, and the smooth transmission process between the screw and the screw can be guaranteed without frequent addition of lubricating oil. . However, plastic nuts have the following disadvantages: the plastic material has poor strength and cannot bear large static loads and dynamic loads. If the length of a single nut is increased to withstand high static loads and dynamic loads, it will be difficult to withstand severe temperature environments with large temperature changes. If it is used under high conditions, it will cause axial swelling due to the large linear expansion coefficient of the plastic material.

The advantages of plastic nuts are that they have good self-lubricating properties, and the lubrication of the entire life cycle can be satisfied by adding lubricating grease once, and the smooth transmission process between the screw and the screw can be guaranteed without frequent addition of lubricating oil. . However, plastic nuts have the following disadvantages: the plastic material has poor strength and cannot bear large static loads and dynamic loads. If the length of a single nut is increased to withstand high static loads and dynamic loads, it will be difficult to withstand severe temperature environments with large temperature changes. If it is used under high conditions, it will cause axial swelling due to the large linear expansion coefficient of the plastic material.

Contents of the invention

The purpose of the present invention is to solve the problem of axial swelling due to the large linear expansion coefficient of the plastic material in the prior art when used in a severe temperature environment with large temperature changes.

In order to achieve the above object, the present invention adopts the following technical solution: a pusher device for a hollowed-out plastic nut, including an assembly shell, a screw, a plastic nut and a metal pipe, and a deceleration drive mechanism is arranged inside the assembly shell, One end of the screw rod is rotatably set on the assembly housing, the screw rod is driven and set by a deceleration drive mechanism, the plastic nut is screw-rotatably set on the outside of the screw rod, and the metal tube is set on the plastic On the outer side of the nut, the screw rod is driven to rotate by a deceleration drive mechanism, which drives the plastic nut to perform reciprocating linear motion on the screw rod. The outer side of the plastic nut is provided with a hollow groove, and the plastic nut can be spliced with multiple indivual.

As a preferred embodiment, the reduction driving mechanism includes a motor, a driving gear, a driven gear and a reduction gear set, and the driving gear, the reduction gear set and the driven gear are all rotatably arranged in the assembly housing, and the wire One end of the rod is set in linkage with the driven gear, the drive gear is set in linkage with the driven gear through a reduction gear set, the drive gear is driven by a motor, and the drive gear is driven to rotate by driving the motor, thereby driving the deceleration The gear set and the driven gear engage and rotate, and then drive the screw mandrel to rotate, and the screw mandrel is decelerated and rotated through the set reduction gear set.

As a preferred embodiment, the reduction gear set includes a first gear, a second gear and a third gear, the first gear is coaxially arranged with the driving gear, and the second gear is coaxially connected with the first gear. The three gears are set in coaxial linkage, the first gear is set in mesh with the second gear, the third gear is set in linkage with the driven gear, the diameters of the first gear, the second gear, and the driven gear are sequentially increased, The drive gear is driven and rotated by the motor, which drives the first gear to rotate, and then drives the second gear and the third gear to rotate. Since the number of teeth of the first gear is less than that of the second gear, the rotational speed of the first gear is smaller than the rotational speed of the second gear. Therefore, the speed of the driven gear engaged with the third gear is smaller than the speed of the third gear, so the driven gear can be effectively decelerated through the reduction gear set.

As a preferred embodiment, the assembly shell is provided with a fixed pipe, the inner side of the fixed pipe is assembled and connected with the screw rod through a bearing, and the surface of the screw rod and the bearing is assembled and connected with a smooth surface. Through the provided fixed tube, in cooperation with the provided bearing, the stability of the rotation of the screw rod on the assembly shell is increased, and the rotation of the screw rod is limited by the fixed tube through the bearing.

As a preferred embodiment, a switch contact ring is provided on the outer side of the end of the metal tube provided with the plastic nut, and a switch for starting the motor is provided on the switch contact ring. When the push rod device is driven , trigger the switch on the switch contact ring, drive the motor to rotate, drive the deceleration drive mechanism to run, and then drive the screw to rotate.

As a preferred embodiment, a plurality of plastic nuts are arranged and spliced with each other on the inside of one end of the metal pipe, and the hollow grooves are evenly distributed on the outside of the plastic nuts in the form of longitudinal strips. A plurality of plastic nuts can provide additional expansion space when the plastic nut is deformed. By setting a uniform hollow groove on the outside of the plastic nut, it is convenient for the plastic nut to be squeezed into the hollow groove when it is heated or deformed by cold. Increase the expansion space of the plastic nut.

As a preferred embodiment, one end of the plastic nut is provided with a limit block, and the other end of the plastic nut is provided with a limit groove that fits with the limit block, and the length of the limit block is longer than The depth of the limiting groove is set by the engagement of the limiting block and the limiting groove, which is convenient for limiting the space between two adjacent plastic nuts. By setting the length of the limiting block longer than the depth of the limiting groove, the splicing At the same time, there is a gap between two adjacent plastic nuts for extrusion when the plastic nut expands and deforms.

As a preferred embodiment, the length difference between the limiting block and the limiting groove is one-tenth of the overall length of the plastic nut.

As a preferred embodiment, a mounting ring is provided at the outer center of the plastic nut, the outside of the mounting ring is flush with the outside of the plastic nut, threaded holes are provided on the mounting ring, and the metal tube The upper thread is pierced with a bolt, and one end of the bolt is threaded through the metal pipe and is threadedly connected with the threaded hole. When installing between the plastic nut and the metal pipe, the thread at one end of the bolt is set on The metal pipe is screwed and rotatably connected with the threaded hole to realize the installation operation between the plastic nut and the metal pipe.

As a preferred embodiment, a limit ring is provided on the side wall of the end of the screw rod away from the plastic nut, the outer wall of the limit ring is slidingly set on the inner wall of the metal tube, and the end surface of the metal tube is provided with a The connecting head, through the set limit ring, can ensure the stability of the movement when the screw rod slides in the metal tube, and there will be no phenomenon of swinging due to the long screw rod, and the set connecting head is convenient for installing the metal tube.

Compared with prior art, advantage and positive effect of the present invention are,

1. The present invention provides additional expansion space for plastic nuts when they are deformed by providing a plurality of plastic nuts. By setting uniform hollow grooves on the outside of the plastic nuts, it is convenient for plastic nuts to be deformed when they are heated or cold. Squeeze into the hollow groove to increase the expansion space of the plastic nut.

2. The present invention increases the stability of the rotation of the screw rod on the assembly shell through the fixed tube provided in conjunction with the provided bearing, and the rotation of the screw rod is limited by the fixed tube through the bearing.

3. When the present invention installs between the plastic nut and the metal pipe, one end of the bolt is threaded through the metal pipe and connected with the threaded hole thread to realize the installation operation between the plastic nut and the metal pipe , to ensure the stability of the plastic nut installation.

4. The present invention can ensure the stability of movement when the screw rod slides in the metal tube through the set limit ring, and there will be no phenomenon of swinging due to the length of the screw rod.

Description of drawings

Fig. 1 is the perspective view of the push rod device of a kind of perforated plastic nut provided by the present invention;

Fig. 2 is a schematic diagram of the assembly of the assembly housing and the deceleration drive mechanism of the push rod device of a perforated plastic nut provided by the present invention;

Figure 3 is a schematic diagram of the assembly of the housing and the screw rod assembly of the push rod device of a perforated plastic nut provided by the present invention;

Fig. 4 is a schematic diagram of the internal assembly structure of the metal tube of the push rod device of a hollowed-out plastic nut provided by the present invention;

Fig. 5 is a schematic diagram of the assembly of the screw rod and the plastic nut of the push rod device of a perforated plastic nut provided by the present invention;

Fig. 6 is an enlarged schematic diagram of the structure at A in Fig. 4 of a push rod device of a perforated plastic nut provided by the present invention;

Fig. 7 is a perspective view of a plastic nut of a push rod device of a perforated plastic nut provided by the present invention.

illustration:

1. Assembly shell; 2. Screw rod; 3. Plastic nut; 4. Metal tube; 5. Hollow groove; 61. Motor; 62. Driving gear; 63. Passive gear; 71. First gear; 72. Second Gear; 73, the third gear; 81, fixed pipe; 82, bearing; 9, switch contact ring; 101, limit block; 102, limit groove; 111, mounting ring; 112, threaded hole; 113, bolt; 121 , Limiting ring; 122, Connector.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-7, the present invention provides a technical solution: a push rod device for a hollowed-out plastic nut, including an assembly case 1, a screw rod 2, a plastic nut 3 and a metal tube 4, and the assembly case 1 A deceleration drive mechanism is provided, one end of the screw rod 2 is rotated and set on the assembly shell 1, the screw rod 2 is driven and set by the deceleration drive mechanism, the plastic nut 3 is screwed and set outside the screw rod 2, and the metal tube 4 is set on the plastic nut 3 On the outside, the screw 2 is driven to rotate by the deceleration drive mechanism, driving the plastic nut 3 to perform reciprocating linear motion on the screw 2. The outer side of the plastic nut 3 is provided with a hollow groove 5, and multiple plastic nuts 3 can be spliced.

As shown in Figures 1-7, the reduction drive mechanism includes a motor 61, a drive gear 62, a driven gear 63 and a reduction gear set, and the drive gear 62, the reduction gear set and the driven gear 63 are all rotatably arranged in the assembly housing 1, and the screw rod One end of 2 is set in linkage with the driven gear 63, the driving gear 62 is set in linkage with the driven gear 63 through the reduction gear set, the driving gear 62 is driven by the motor 61, and by driving the motor 61, the driving gear 62 is driven to rotate, and then the reduction gear is driven Group and driven gear 63 carry out meshing rotation, and then drive screw mandrel 2 to rotate, through the reduction gear set that is provided with, screw mandrel 2 is carried out decelerating rotation.

As shown in Figures 1-7, the reduction gear set includes a first gear 71, a second gear 72 and a third gear 73. The shafts are set in linkage, the first gear 71 and the second gear 72 are meshed, the third gear 73 is set in linkage with the driven gear 63, the diameters of the first gear 71, the second gear 72 and the driven gear 63 are sequentially increased, and the motor 61 drives the gears 62 is driven to rotate, drives the first gear 71 to rotate, and then drives the second gear 72 and the third gear 73 to rotate, because the number of teeth of the first gear 71 is less than that of the second gear 72, the rotation speed of the first gear 71 is smaller than the rotation speed of the second gear 72 , in turn, it can be obtained that the rotational speed of the driven gear 63 meshed with the third gear 73 is lower than the rotational speed of the third gear 73, so the driven gear 63 can be effectively decelerated through the reduction gear set.

As shown in Figure 1-7, the assembly shell 1 is provided with a fixed tube 81, the inner side of the fixed tube 81 is assembled and connected with the screw rod 2 through the bearing 82, and the surface of the screw rod 2 and the bearing 82 is assembled and connected with a smooth surface. The fixed pipe 81 and the provided bearing 82 increase the stability of the rotation of the screw mandrel 2 on the assembly housing 1 , and the rotation of the screw mandrel 2 is limited by the fixed pipe 81 .

As shown in Figure 1-7, the metal tube 4 is provided with a switch contact ring 9 on the outside of one end of the plastic nut 3, and the switch contact ring 9 is provided with a switch for starting the motor 61. When the push rod device is driven, the The switch on the switch contact ring 9 is triggered to drive the motor 61 to rotate, drive the deceleration drive mechanism to run, and then drive the screw mandrel 2 to rotate.

As shown in Figures 1-7, there are multiple plastic nuts 3 that are spliced together and arranged inside one end of the metal tube 4. Hollow grooves 5 are evenly distributed on the outside of the plastic nut 3 in the form of vertical strips. 3. There is extra space for expansion when the plastic nut 3 is deformed. By setting a uniform hollow groove 5 on the outside of the plastic nut 3, it is convenient for the plastic nut 3 to squeeze into the hollow groove 5 when it is deformed by heat or cold. Press to increase the expansion space of the plastic nut 3.

As shown in Figure 1-7, one end of the plastic nut 3 is provided with a limit block 101, and the other end of the plastic nut 3 is provided with a limit groove 102 that fits with the limit block 101, and the length of the limit block 101 is longer than that of the limit block. The depth of the groove 102 is set by the engaging of the limiting block 101 and the limiting groove 102, which is convenient for limiting between two adjacent plastic nuts 3. By setting the length of the limiting block 101 longer than the depth of the limiting groove 102, When splicing, there is a gap between two adjacent plastic nuts 3 for the plastic nuts 3 to squeeze in when they expand and deform.

As shown in FIGS. 1-7 , the length difference between the limiting block 101 and the limiting groove 102 is one-tenth of the overall length of the plastic nut 3 .

As shown in Figure 1-7, a mounting ring 111 is provided at the outer center of the plastic nut 3, and the outer side of the mounting ring 111 is flush with the outer side of the plastic nut 3. A bolt 113 is provided, and one end thread of the bolt 113 runs through the metal pipe 4 and is threadedly connected with the threaded hole 112. When installing between the plastic nut 3 and the metal pipe 4, one end of the bolt 113 is threaded through the metal pipe 4 and connected It is screwed and rotatably connected with the threaded hole 112 to realize the installation operation between the plastic nut 3 and the metal pipe 4 .

As shown in Figure 1-7, a limit ring 121 is provided on the side wall of the end of the screw rod 2 away from the plastic nut 3, the outer wall of the limit ring 121 is slidingly arranged on the inner wall of the metal pipe 4, and the end surface of the metal pipe 4 is provided with a connector 122, Through the set limit ring 121, the stability of the movement can be guaranteed when the screw mandrel 2 slides in the metal tube 4, and there will be no phenomenon of swinging due to the length of the screw mandrel 2. Through the set connector 122, it is convenient for the metal tube 4 to install.

Working principle: When the push rod device is in operation, the end of the metal tube 4 away from the assembly shell 1 is assembled and fixed, and the deceleration drive mechanism is driven to drive the screw 2 to rotate. Since the plastic nut 3 is set on the inner side of the metal tube 4, the plastic The nut 3 and the screw rod 2 are screwed and set. The rotation of the screw rod 2 can drive the metal tube 4 to reciprocate and linearly move on the screw rod 2. By setting the hollow groove 5 outside the plastic nut 3, the plastic nut 3 can be avoided in low temperature or high temperature environment. Deformation leads to the phenomenon of axial swelling, which leads to the failure of the plastic nut 3 to slide on the screw rod 2, resulting in the failure of the adjustment function of the push rod device. Through the set of multiple plastic nuts 3, and the multiple plastic nuts 3 directly It can be spliced, so that there is a certain gap between adjacent plastic nuts 3, which can provide extra expansion space for plastic nuts 3 when they are deformed, so as to avoid extrusion and swelling with screw rod 2, and ensure the service life of plastic nuts 3.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or modify the equivalent of equivalent changes. The embodiments are applied to other fields, but any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solutions of the present invention without departing from the content of the technical solutions of the present invention.

Claims (10)

1. The utility model provides a push rod device of fretwork window formula plastic nut, includes assembly casing (1), lead screw (2), plastic nut (3) and tubular metal resonator (4), be equipped with speed reduction actuating mechanism in assembly casing (1), the one end rotation of lead screw (2) sets up on assembly casing (1), lead screw (2) are through speed reduction actuating mechanism drive setting, plastic nut (3) screw thread rotation sets up lead screw (2) outside, tubular metal resonator (4) set up plastic nut (3) outside, a serial communication port, lead screw (2) are through speed reduction actuating mechanism drive rotation, drive plastic nut (3) are in reciprocating rectilinear motion on lead screw (2), the outside of plastic nut (3) is equipped with fretwork groove (5), plastic nut (3) can splice and be equipped with a plurality of.

2. A push rod device for a windowed plastic nut according to claim 1, wherein: the speed reduction driving mechanism comprises a motor (61), a driving gear (62), a driven gear (63) and a speed reduction gear set, wherein the driving gear (62), the speed reduction gear set and the driven gear (63) are all rotationally arranged in the assembly shell (1), one end of the screw rod (2) is in linkage with the driven gear (63), the driving gear (62) is in linkage arrangement with the driven gear (63) through the speed reduction gear set, and the driving gear (62) is driven through the motor (61).

3. A push rod device for a windowed plastic nut according to claim 2, wherein: the reduction gear set comprises a first gear (71), a second gear (72) and a third gear (73), wherein the first gear (71) and the driving gear (62) are coaxially arranged in a linkage mode, the second gear (72) and the third gear (73) are coaxially arranged in a linkage mode, the first gear (71) and the second gear (72) are meshed, the third gear (73) and the driven gear (63) are arranged in a linkage mode, and the diameters of the first gear (71), the second gear (72) and the driven gear (63) are sequentially increased.

4. A push rod assembly for a windowed plastic nut according to claim 3, wherein: the assembly shell (1) is provided with a fixed pipe (81), the inner side of the fixed pipe (81) is in assembly connection with the screw rod (2) through a bearing (82), and the surface of the position where the screw rod (2) is in assembly connection with the bearing (82) is smooth.

5. A push rod device for a windowed plastic nut according to claim 2, wherein: the metal tube (4) is provided with a switch contact ring (9) at the outer side of one end of the plastic nut (3), and a switch for starting the motor (61) is arranged on the switch contact ring (9).

6. A push rod assembly for a windowed plastic nut according to claim 5, wherein: the plastic nuts (3) are provided with a plurality of hollow grooves (5) which are uniformly distributed in a longitudinal strip shape and are spliced with one another and arranged on the inner side of one end of the metal pipe (4) on the outer side of the plastic nuts (3).

7. A push rod assembly for a windowed plastic nut according to claim 6, wherein: one end of the plastic nut (3) is provided with a limiting block (101), the other end of the plastic nut (3) is provided with a limiting groove (102) which is matched with the limiting block (101) in a clamping mode, and the length of the limiting block (101) is longer than the depth of the limiting groove (102).

8. A push rod assembly for a windowed plastic nut according to claim 7, wherein: the length difference between the limiting block (101) and the limiting groove (102) is one tenth of the integral length of the plastic nut (3).

9. A push rod assembly for a windowed plastic nut according to claim 8, wherein: the plastic nut is characterized in that a mounting ring (111) is arranged at the center position of the outer side of the plastic nut (3), the outer side of the mounting ring (111) is flush with the outer side of the plastic nut (3), a threaded hole (112) is formed in the mounting ring (111), a bolt (113) is threaded through the metal pipe (4), and one end of the bolt (113) penetrates through the metal pipe (4) and is in threaded assembly connection with the threaded hole (112).

10. A push rod assembly for a windowed plastic nut according to claim 9, wherein: the screw rod (2) is far away from a limiting ring (121) is arranged on the side wall of one end of the plastic nut (3), the outer wall of the limiting ring (121) and the inner wall of the metal tube (4) are arranged in a sliding mode, and a connector (122) is arranged on the end face of the metal tube (4).

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