JP2002351562A - Mono lever operating device - Google Patents

Abstract

[PROBLEMS] To provide a mono-lever operating device, particularly to a mono-lever operating device, which has good wear resistance, has little change in a set speed, and is capable of restricting the rotation amount of an operating lever which can be adjusted from the outside. I do. A monolever operating device is provided with a tilting direction and a tilting amount of a longitudinal component and a lateral component when a two-dimensional arbitrary tilting operation is performed on a monolever (9) at least in the longitudinal direction and the lateral direction. Drive signal generating means (Hd) for outputting two corresponding drive signals, and rotatably supported by a monolever operation body (5), and rotated in either the front-rear direction or the left-right direction when the monolever is operated. Rotating shaft (13), which is disposed orthogonal to the longitudinal axis of the rotating shaft, and operates the mono lever in a direction orthogonal to the direction in which the rotating shaft is rotated in the front-rear direction or the left-right direction. A mono-lever operating device comprising: a mono-lever rotating shaft (11) rotatably supported, the mono-lever operating device comprising: a rotating shaft that abuts on the rotating shaft rotatably supported by the mono-lever operating body to regulate a rotating amount. Drive shaft rotation regulation Means (23) are provided on the monolever operating body (5).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a monolever operating device, and more particularly to a monolever device capable of improving the reliability and durability of a monolever and adjusting a stroke.

[0002]

2. Description of the Related Art An operation lever device for generating an operation signal by a tilting operation of a monolever and controlling the driving of two hydraulic actuators based on the operation signal has already been known. For example, Japanese Patent Application Laid-Open No. 9-89515 discloses an electric operation lever device that outputs a displacement as an electric signal for each of four pistons by tilting a single operation lever. The two hydraulic actuators can be driven and controlled based on the electric signal output from the electric operation lever device.

[0003] International Publication WO96 / 15374 discloses a hydraulic operating lever device for outputting a hydraulic signal. The present applicant has filed a patent application No. 11-12596.
No. 7, as shown in FIG. 10, proposes an operation lever device that can further hold the operation lever in an operation position with a hydraulic operation lever device. According to the proposal, FIG. 10A is a plan view of the hydraulic operation lever device 60 as viewed from above, and FIG. 10B is a cross-sectional view taken along line A1-A1 of FIG. As shown, the hydraulic operating lever device 6
0 is a single operation lever 61 that can be tilted in the front-rear and left-right directions.
Further, the single operation lever 61 is provided with a hydraulic main body 63 that outputs the displacement as a hydraulic signal for each of the four pistons by tilting.

The hydraulic body 63 includes four pistons 65.
The tips (upper ends) of a, 65b, 65c, and 65d are attached so as to abut the disc plate 67 of the single operation lever portion 61. Pistons 65a, 65b, 65
c and 65d are operating levers 69 of the single operating lever portion 61.
Disk plate 67 according to the tilt direction and tilt amount of
And is displaced. Due to this displacement, the hydraulic body 63 moves the pistons 65a, 65b, 6
A hydraulic pressure generating means Hd for generating a hydraulic signal having a magnitude corresponding to the displacement amounts of 5c and 65d is provided.

[0005] The single operating lever 61 is provided with a hydraulic main body 63.
Are mounted via support shafts 71 and 73 as free joints and a disk plate 67. Hydraulic body 6
The casing 77 of the single operation lever 61 is attached to the third attachment plate 75. Inside the casing 77, a disk plate 67 is housed, and support shafts 71 and 73 are rotatably mounted.

The operating lever 6 is provided at the upper end of the casing 77.
A guide member 81 is provided to restrict the tilting of 9. The guide member 81 has a square opening formed in the guide 83.
It is formed as. An operation lever 69 is passed through a guide 83 of the guide member 81. The guide 83 has a knob (not shown) of the operation lever 69 and the disc plate 67.
And the lever shaft 69a between them can be abutted. Therefore, by tilting the operation lever 69 in, for example, the forward direction F to abut on the guide 83 and moving the operation lever 69 along the guide 83, it is possible to obtain an operation feeling that the lever tip moves right beside. it can.

When the operating lever 69 is tilted until it comes into contact with the guide 83, a displacement signal of the maximum output Pmax is output from the hydraulic operating lever device 60. At this time, the maximum output Pmax is set by the stroke of the operation lever 69 abutting on the guide 83, and for example, the maximum traveling speed or the turning speed of the vehicle is set. When the operation lever 69 is tilted, the support shaft 71 is rotated around the axis 71 a by an amount of rotation corresponding to the components of the front and rear directions F and B of the tilt operation direction as shown by the arrow E. Further, the support shaft 73 rotates around the shaft center 73a as shown by the arrow D by a rotation amount corresponding to the components of the left and right directions L and R of the tilt operation direction.

The operator moves the operation lever 69 to the guide 83
When the hand is released from the operation lever 69 at a position tilted in an oblique direction until it comes into contact with the
Are held at the tilting position at the time when the hand is released, and the components in the left and right directions L and R of the tilting operation direction are returned by the return springs 87 and 89 while contacting the guide 83. As a result, the piston displacements of the components F and B in the front-rear direction remain unchanged, the output of the hydraulic signal is maintained, and the piston displacements of the components L and R in the left-right direction return to zero. Become. As a result, the vehicle moves in the front-rear direction F, B
You can proceed to.

Conversely, when the operator desires to bend the traveling direction of the vehicle while traveling forward or backward, the operator is tilted forward and backward until the operation lever 69 contacts the guide 83. At the position, the operation lever 69 is moved in the left and right directions L and R while contacting the guide 83. As a result, the piston displacements of the components in the front and rear directions F and B remain unchanged, the output of the hydraulic signal is maintained, and the piston displacements of the components in the left and right directions L and R go to the displaced positions in accordance with the operation amounts. The signal output outputs a hydraulic signal Pp according to the displacement amount, and the vehicle can turn in a desired direction while traveling.

[0010]

In the above arrangement, since the operating lever is operated in the left-right direction while abutting on the guide, the contact portion S between the operating lever and the guide is worn.
In FIG. 10, since the guide member is disposed above, the stroke between the operation lever and the contact portion S is large, and the operation lever and the guide come into contact with each other at a high rubbing speed. . As described above, in FIG. 10, the stroke between the operation lever and the guide changes after shipment, and the maximum output Pmax changes. For example, the drivability changes because the maximum running speed or the turning speed of the vehicle changes. However, there is a problem that it becomes difficult for the operator to drive the vehicle. In particular, bulldozers, wheel loaders, and the like that work while traveling are models that require a large number of steering operations, and there is a strong demand for this improvement. Further, when such a guide member is attached to a casing in order to restrict the tilt of the operation lever at the time of shipment, the stroke between the operation lever and the guide is determined by the dimensions of the attached guide member. There is a problem that the maximum speed cannot be adjusted.

The present invention has been made in view of the above problems, and relates to a mono-lever operating device. In particular, the present invention relates to a mono-lever operating device which has good wear resistance, has little change in a set speed, and can be externally adjusted. It is an object of the present invention to provide a monolever operating device capable of regulating a moving amount.

[0012]

In order to achieve the above object, a monolever operating device according to the present invention performs a two-dimensional arbitrary tilting operation of a monolever at least in the front-rear direction and the left-right direction. A drive signal generating means for outputting two drive signals according to the tilt direction and the tilt amount of the front-back direction component and the left-right direction component, and a mono-lever operation main body which is rotatably supported and receives the operation of the mono-lever. A rotation shaft that rotates in either the front-rear direction or the left-right direction, and a direction that is disposed orthogonal to the longitudinal axis of the rotation shaft and that rotates the rotation shaft in the front-rear direction or the left-right direction. A mono-lever operating device, comprising: a mono-lever rotating shaft rotatably supporting the mono-lever operation in a direction orthogonal to the mono-lever operating body. The rotation shaft rotation restricting means for restricting the contact rotation amount to the rotation shaft that is has a configuration provided on the Monoreba operation body. In this case, the rotation shaft rotation restricting means can adjust the amount of rotation. Further, it is preferable that a rotation restricting means for the mono lever be provided on the rotation shaft so that the mono lever comes into contact with the surface and restricts the amount of rotation by surface contact. Further, a driving signal is generated by operating the mono lever in the front-rear direction by the rotation axis to output a traveling signal, and operating the mono lever in the left and right direction along the rotation axis to output a turning signal. It is good means. Further, when a traveling signal is output by operating the mono-lever in the front-rear direction by the rotation shaft, it is preferable to have a holding means for holding the mono-lever at the tilt operation position.

According to the above construction, in the monolever operating device, the monolever operating main body is provided with the rotation axis rotation restricting means for abutting on the rotation axis and restricting the rotation amount, so that the monolever operation body does not slip. Stopping and regulating, wear is eliminated, durability is improved, and reliability is improved. Further, since the rotation axis rotation restricting means is attached to the mono lever operation main body, the adjustment can be performed from the outside, so that fine adjustment can be easily performed as necessary even after assembling or after shipment, and variation in vehicle performance is reduced. As well as maintainability is improved. Also,
A rotation control means for the mono lever is provided on the rotation shaft rotatably supported by the mono lever operation body, and the rotation amount is controlled by abutting the mono lever by surface contact, so that wear is eliminated and durability is improved. The reliability has improved. Also, when the mono lever is operated in the front-rear direction, the rotation axis is rotated to output a traveling signal, and the mono lever is operated in the left-right direction along the rotation axis to output a turning signal. Therefore, an operation that matches the operator's operational feeling can be performed, and the operability is improved. Further, since the mono lever has holding means for holding the mono lever in the tilt operation position, when the mono lever is operated in the front-rear direction, the mono lever is held in the tilt operation position by the holding means, and a predetermined traveling signal corresponding to the tilt operation position is provided. Is output, the operator can release his / her hand, and can perform other operations such as a work machine or turning to improve operability.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a monolever device according to the present invention will be described below with reference to the drawings. In addition,
In the following, the same components as those of the conventional technology or other embodiments are denoted by the same reference numerals, and description thereof will be omitted. First, the monolever device according to the first embodiment will be described with reference to FIGS. 1, 2, 3, 4, 5, and 6. 1 is a plan view in which a part of a hydraulic mono-lever device 1 according to a first embodiment is sectioned, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. FIG. 4 shows an operation diagram of the hydraulic mono-lever device 1 of FIG. 1, FIG. 5 is a cross-sectional view taken along the line CC of FIG. 1, and FIG. 6 is a hydraulic mono-lever. FIG. 4 is a diagram illustrating an operation of the operation of the device 1.

In FIG. 2 and FIG. 3, a hydraulic mono-lever device 1 includes a mono-lever portion 3 which can be tilted in the front-rear and left-right directions, and a hydraulic pressure which outputs the displacement as a hydraulic signal for each of four pistons by tilting the mono-lever portion 3. It comprises a main body 63. The casing 5 of the monolever unit 3 is attached to a mounting plate 75 of the hydraulic body 63. Also, the disk plate 7 has four pistons 65a, 65b, 65c, 65 of the hydraulic body 63.
It is attached so as to abut the tip (upper end) of d.
The disc plate 7 is attached to the lower end of the mono lever 9 and the pistons 65a, 65b,
5c and 65d are pushed. At this time, a seat 7a that can be adjusted in and out is attached to the disc plate 7, and the seat 7a and the pistons 65a, 65b, 65c,
The contact with 65d is adjusted.

The pistons 65a, 65b, 65c, 6
5d is displaced by being pushed by the disc plate 7 in accordance with the tilting direction and the tilting amount of the mono lever 9 of the mono lever portion 3, and this displacement causes the hydraulic body 63 to displace the pistons 65a, 65b, 65c, 65d respectively. Generating means Hd for generating a hydraulic signal of a magnitude corresponding to
Is provided. That is, the hydraulic pressure generating means Hd generates a hydraulic signal having a magnitude corresponding to the displacement amount by which the pistons 65a, 65b, 65c, 65d are pushed in accordance with the tilt direction and the tilt amount of the mono lever 9 in the front-rear direction and the left-right direction. ing.

In FIGS. 1, 2 and 3, the mono lever portion 3 is attached to the hydraulic main body portion 63 via the mono lever rotating shaft 11 and the rotating shaft 13 as free joints and the disk plate 7 with respect to the hydraulic body portion 63. Have been. The upper part of the monolever 9 is substantially formed of a round bar, and a knob (not shown) is attached to the end thereof. Further, a two-sided width 9a is formed at the lower end of the monolever 9, and the monolever rotating shaft 11 penetrates the two-sided width 9a to support the monolever 9.

The two-side width 9a of the mono lever 9 is
The mono-lever rotating shaft 11 that is inserted into the slit hole 15 whose longitudinal direction is parallel to the center line G of the rotating shaft 13 and that supports the mono lever 9 is provided on the rotating shaft 13. On the axis Oa and the center line G of the axis Oa
Is fitted in a hole 17 for a mono-lever rotating shaft of the rotating shaft 13 formed orthogonally to. Thereby, the mono lever 9 is supported by the rotation shaft 13 through the mono lever rotation shaft 11 and the mono lever rotation shaft hole 17, and is rotatable in the direction of arrow H around the axis Oa of the rotation shaft 13. Has become.

As shown in FIGS. 2 and 4, the rotating shaft 13 is rotatably supported by bearings 19 attached to both ends of the casing 5. A slit hole 15 is formed in the rotating shaft 13 in the vertical direction in the vicinity of the center between the bearings 19 along the center line G, and the two-side width 9a of the mono lever 9 is minutely spaced in the slit hole 15. Is inserted. Lubricant such as grease is injected between the slit hole 15 and the small gap between the two surfaces 9a of the mono lever 9 to assemble the mono lever 9 with respect to the rotation shaft 13. , A smooth circular motion F is performed in the direction of the center line G of the rotation shaft 13 about the axis Ob of the rotation axis.

As shown in FIG. 4, the slit hole 15 is provided at both ends thereof with a mono lever rotation restricting means 21 for restricting the amount of rotation when the mono lever 9 makes an arc movement F about the axis Ob. ing. This mono-lever rotation restricting means 21 restricts the maximum amount of rotation of the mono lever 9, and controls the piston 65 with which the disc plate 7 abuts.
b outputs the maximum hydraulic pressure Pmax. The rotation restricting means 21 for a monolever is formed in a curved shape so that the conical portion 9b of the monolever 9 abuts on the surface. Thereby, the contact surface pressure is reduced and the durability is improved.

Further, as shown in FIG.
When the mono lever 9 rotates around the axis Ob, the disc plate 7 attached to the mono lever 9 does not interfere even when tilted. An R-shaped notch 13c is formed. Thereby, the size of the mono lever portion 3 in the vertical direction can be reduced.

When the mono-lever 9 is rotated in the direction H perpendicular to the center line G of the axis Oa, the width 9a of the lower end of the mono-lever 9 comes into contact with the slit hole 15 when the mono-lever 9 is rotated. To rotate about the axis Oa of the rotating shaft 13. The amount of rotation of the monolever 9 is restricted by the rotation shaft 13 abutting on a rotation shaft rotation restricting means 23 described later.

To summarize the above, for example, as shown in FIG. 2, when the mono lever 9 is rotated by the circular motion F in the left-right direction in the drawing, the disc plate 7 is rotated by the axis Ob of the mono-lever rotating shaft 11. When the mono-lever 9 is rotated in the front-rear direction H (direction perpendicular to the paper surface) as shown in FIG.
3 rotates around the axis Oa and presses the piston 65a or 65c without interfering with the rotating shaft 13.

When the mono lever 9 is rotated (rotated in an oblique direction) in the front-rear and left-right directions, the disk plate 7 is tilted in accordance with the rotation of the mono-lever rotating shaft 11 and the rotating shaft 13. Then, each piston 65a,
65b, 65c, and 65d are pressed, and the hydraulic pressure according to the pressed front-back direction component and left-right direction component is output from the hydraulic pressure generation means Hd.

As shown in FIG. 5A, which is a cross-sectional view taken along the line CC of FIG. 1, the pivot shaft 13 is provided between the slit hole 15 and one of the bearings 19 along the center line G direction. A parallel surface 13d is provided in the up-down direction. When the monolever 9 is rotated in a direction perpendicular to the center line G of the axis Oa, the parallel surface 13d is provided with a pivot shaft formed by a bolt which is removably attached to the casing 5 which is a monolever operation main body. The movement regulating means 23 comes into contact. When the mono lever 9 is rotated in the direction of arrow H perpendicular to the center line G of the axis Oa, the rotation axis rotation restricting means 23 rotates the rotation axis 13 about the axis Oa. It regulates momentum.

The rotation axis rotation restricting means 23 is provided on the parallel surface 1.
A pair of regulating means 23a and 23b are provided on both sides of 3d.
It is provided by being screwed to the casing 5, and by changing the lengths La and Lb of the respective regulating means 23a and 23b to different sizes, a difference in the amount of rotation in the direction of arrow H ( Ha-Hb). For example, when the rotating shaft rotation restricting means 23 is used in the front-rear direction, and when setting the traveling speed in the forward-reverse direction, the forward speed and the reverse speed can be separately adjusted.

Further, as shown in FIG. 5 (b), a pair of screw-shaped restricting means 231 is provided.
a, 231b may be provided to be screwed to the casing 5 and fixed by the lock nuts 231c, 231c. Thereby, each regulating means 231
a, 231b, the difference in the amount of rotation (Ha-H) in the same manner as described above.
b) can be provided. And a pair of regulating means 2
Since 31a and 231b can be fixed at arbitrary positions by lock nuts 231c and 231c, finer adjustment can be easily performed.

The tip 23S of a pair of bolt-shaped restricting means 23a and 23b, which is an example of the rotating shaft rotation restricting means 23, is formed in a conical conical surface.
When rotated in the direction, the pair of bolt-shaped restricting means 23
The conical surface of the tip 23S of the a and 23b and the parallel surface 13d are in line contact with each other, and the contact surface pressure is reduced. It has improved durability and reliability.

As shown in FIGS. 2 and 4, the rotating shaft 13 is provided with a holding means 25 on one end surface 13e. In the holding means 25, a roller bearing 27, a disk 29, and a spring 31 are sequentially arranged on an end face of the rotating shaft 13, and one end face of the spring 31 is held in contact with a plug 33. The plug 33 is screwed to the casing 5 so as to adjust the amount of in / out. As the plug 33 moves in and out, the spring force of the spring 31 changes, and the change in the spring force changes the pressing force applied to the end surface of the rotating shaft 13. Due to the change in the pressing force, the rolling resistance between one end surface 13e of the rotating shaft 13 and the roller bearing 27 attached to this end surface changes, and the holding force for holding the mono lever 9 in the tilting operation position is optimal. Set to holding force.

By using the roller bearing 27, the sliding resistance at the time of operation can be reduced, so that the operation can be performed with a light force when releasing the holding means 25, and the durability and reliability are improved. The spring 31 is formed of a disc spring, but other types of springs may be used, and a hydraulic pressure may be applied and pressed by a piston when a holding force is required.

Although not shown, a neutral position detecting mechanism is mounted on the rotating shaft 13 between the slit hole 15 and the other bearing 19 (the left side in FIG. 2). The neutral position detecting mechanism forms a detecting groove at a position corresponding to the neutral position of the rotating shaft 13, and a ball or the like pressed by a spring enters the detecting groove to increase the turning power. Due to this increase, the operating force of the mono lever 9 increases, and the neutral position is detected. As another method, a neutral position detection switch may be provided to electrically detect the neutral position.

The casing 5 is attached to a mounting plate 75, and the mounting plate 75 has a hydraulic body 63.
Is attached. The mounting plate 75 is mounted near the driver's seat (not shown) of the vehicle. In the casing 5,
A deformable cover 39 is attached to the monolever 9 to prevent foreign matter from entering the inside. As shown in FIGS. 1 and 2, a rotating shaft 13 is rotatably inserted into the casing 5 by a bearing 19 at a central portion thereof. Also, as shown in FIGS. 1 and 5, the casing 5 has a rotation of a bolt or the like which is orthogonal to the rotation shaft 13 and restricts the rotation amount of the mono lever 9 in the H direction between the bearing 19 and the mono lever 9. A shaft rotation restricting means 23 is provided. As shown in FIGS. 2 and 4, a plug 33 of a holding means 25 for holding the rotation of the rotation shaft 13 is screwed to one end surface 13 e of the rotation shaft 13 of the casing 5 so as to be able to adjust the amount of movement. I have.

In the vicinity of the center of the casing 5, a monolever 9 is provided upright as shown in FIGS.
The monolever 9 is attached to the casing 5 via a monolever rotating shaft 11 and a rotating shaft 13 so as to be tiltable in the left-right direction, the front-rear direction, and the oblique direction including the left-right direction and the front-rear direction. The mono-lever 9 is tilted in one of the front-rear direction and the left-right direction by the mono-lever rotation restricting means 21.
In addition, the amount of rotation of the one-side tilting in the front-rear direction or the opposite side in the left-right direction is restricted by the rotation axis rotation restricting means 23. For example, in a construction machine, the adjustable rotation axis rotation restricting means 23 moves forward and backward,
It is preferable that the mono-lever rotation restricting means 21 which does not need to be adjusted be used for turning or steering.

Next, the operation of the above configuration will be described. FIGS. 1, 2 and 3 show a state in which the mono lever 9 is located in the middle without tilting and is in the neutral position Mn where no hydraulic pressure is generated from the hydraulic pressure generating means Hd. For example,
From this state, as shown in FIG. 6, it is assumed that the mono lever 9 is tilted in the front and rear directions F and B and tilted to the position Ma. At this time, the monolever 9 has a flat width 9 at its lower end.
a comes into contact with and presses the slit hole 15 of the rotating shaft 13 to rotate the rotating shaft 13 in the direction of arrow H about the axis Oa.

In the case of rotation of the rotation shaft 13 in the direction of arrow H,
The mono lever 9 is stopped by being held at the position Ma corresponding to the amount of rotation of the mono lever 9 by the holding means 25. As a result, the oil pressure of the component Ma in the front-rear direction F and B of the position Ma corresponding to the amount of rotation of the mono lever 9 is output from the oil pressure generation means Hd, and the vehicle operates in the operating direction of the mono lever 9 at a speed corresponding to the amount of rotation of the mono lever 9. Carry forward according to. Alternatively, the same applies to the case of reverse travel.

When the rotation amount of the mono lever 9 is further increased to the position Mb, the parallel surface 13d of the rotation shaft 13 comes into contact with the rotation shaft rotation restricting means 23 such as a bolt, so that the mono lever 9 reaches the maximum rotation amount. At the same time, the position Mb is held by the holding means 25, and the maximum oil pressure output Pmax of the components in the front and rear directions F and B is output from the oil pressure generation means Hd. Accordingly, the vehicle continues to advance at the maximum traveling speed in accordance with the operation direction of the mono lever 9. Alternatively, the same applies to the case of reverse travel.

Next, it is assumed that the mono lever 9 is tilted in the illustrated left and right directions L and R from the state of the neutral position Mn to the position Mc as shown by a dotted line. At this time, since the two-side width 9a of the monolever 9 has a small gap with respect to the slit hole 15 of the rotating shaft 13,
The shaft Ob is rotated in the direction of the center line G of the shaft core Ob, and smoothly rotates. As a result, the oil pressure of the left and right directions L and R of the position Mc corresponding to the amount of rotation of the mono lever 9 is output from the oil pressure generation means Hd, and the vehicle operates in the operating direction of the mono lever 9 at a speed corresponding to the amount of rotation of the mono lever 9. Perform left turn turn according to. Alternatively, the same applies to a right turn.

Further, when the rotation amount of the mono lever 9 increases to the position Md, the mono lever 9 comes into contact with the mono lever rotation restricting means 21 with low surface contact. Accordingly, the hydraulic pressure generating means Hd outputs the maximum hydraulic pressure output Pmax of the left and right directions L and R, and the vehicle performs a left turning small radius turn corresponding to the operating direction of the mono lever 9 at the maximum turning speed. Do. Alternatively, in the case of the right direction, a pivot turn of a small radius is similarly performed.

When the operator releases his / her hand from the mono-lever 9 based on the amount of rotation of the tilted positions Mc and Md, the components of the left and right directions L and R of the tilting operation direction become the mono-lever 9 when the hand is released. The return springs 87 and 89 return to the neutral position. As a result, the piston displacement of the components in the left and right directions L and R returns to zero, so that the output of the hydraulic pressure signal becomes zero, and the right turn of the vehicle in accordance with the operation direction stops. Alternatively, the same applies to a left turn.

Next, it is assumed that the mono-lever 9 is tilted leftward and forward from the state of the neutral position Mn to the position Me, as indicated by a dashed line, in accordance with the illustrated front-rear direction F and left-right direction L. . At this time, the action of the mono lever 9 in the front-rear direction F and the action in the left-right direction L are simultaneously performed as described above. First, when the mono lever 9 is tilted obliquely, the rotation shaft 13 rotates about the axis Oa as shown by the arrow H by a rotation amount corresponding to the component in the front-back direction. Further, due to the oblique tilt, the mono-lever rotation shaft 11 rotates about the axis Ob as shown by an arrow F by a rotation amount corresponding to the component in the left-right direction.

As described above, in the case of the rotation of the rotation shaft 13 in the direction of the arrow H, the holding means 25 holds the mono lever 9 at a position corresponding to the amount of rotation, and the disk plate 7 is moved forward by the piston 65a. Press. As a result, the hydraulic pressure of the directional component in the forward direction F is output from the hydraulic pressure generation means Hd according to the amount of rotation of the forward piston 65a. Upon receiving the hydraulic pressure, the vehicle moves forward at a speed corresponding to the amount of rotation of the monolever 9 in accordance with the operation direction of the monolever 9.

As described above, the arrow F of the rotating shaft 13
In the case of rotation in the direction, the disk plate 7 presses the left turning piston 65d. Accordingly, the hydraulic pressure of the direction component in the left turning direction L is output from the hydraulic pressure generation means Hd according to the amount of rotation of the left turning piston 65d. Receiving this oil pressure, the vehicle makes a left turn according to the operation direction of the monolever 9 at a speed corresponding to the amount of rotation of the monolever 9.

Accordingly, in the vehicle, when the mono lever 9 is tilted to the left and in the forward direction, the piston 65a for forward movement and the piston 65d for left turn are simultaneously pressed by the disc plate 7, and the hydraulic pressure of the forward direction component and The hydraulic pressure of the left-turning direction component is generated, and the vehicle turns forward while turning to the left at a speed corresponding to the oil pressure. This mono lever 9
Is operated in the forward direction to the position Mf in contact with the rotation axis rotation restricting means 23 and the mono lever rotation restricting means 21 in the turning direction, the forward direction F from the hydraulic pressure generating means Hd. The maximum hydraulic pressure output Pmax of the direction component is output in each of the left direction L and the left direction L, and the vehicle turns forward while turning left at the maximum speed according to the direction.

This forward left turn position Me or Mf
When the operator releases his / her hand from the mono-lever 9, the component in the leftward direction L of the tilt operation direction is released by the return springs 87 and 89 of the hydraulic main body 63 at the time of releasing the hand.
As shown in (5), it returns to the forward position Ma or Mb on the neutral position line in the left-right direction L, R. Thereby, the left direction L
Therefore, the output of the hydraulic pressure signal becomes zero, and the leftward turning of the vehicle according to the operation direction stops.

However, in the forward direction, the mono lever 9 is moved by the holding means 25 to the positions Ma, Mb corresponding to the amount of rotation.
, The hydraulic pressure of the directional component in the forward direction F is changed by the hydraulic pressure generation means Hd in accordance with the amount of rotation of the forward piston 65a.
And the vehicle continues to move forward in accordance with the operation direction of the mono lever 9 at a speed corresponding to the amount of rotation of the mono lever 9.

At this time, the movement between the forward movement positions Ma and Mb and the turning positions Me and Mf is performed at a position associated with the rotation of the rotation shaft 13 so that the two-plane width 9a at the lower end of the mono lever 9 is changed to the slit hole 15. , And is rotated about the axis Oa of the rotating shaft 13, so that no abrasion occurs. Also,
Even if the monolever 9 is rotated in the left and right directions at the maximum positions Mb and Mf, the contact between the conical shape of the tip 23a of the rotation shaft rotation restricting means 23 and the parallel surface 13d is stopped, so that there is no wear and durability. And reliability is improved.

Next, a monolever device according to a second embodiment will be described with reference to FIGS. FIG. 7 is a side cross-sectional view of the first turning shaft rotation restricting means 23A of the hydraulic mono-lever device 1A, and FIG.

In the above-described first embodiment, the rotation axis rotation restricting means 23 is provided with a parallel surface 13d on the rotation axis 13, and the rotation axis rotation restriction means 23 made of Axis 1
3 was restricted. On the contrary,
In the second embodiment, the first rotation axis rotation restricting means 23A is
A conical hole 13e is provided in the first rotating shaft 13A, and a first rotating shaft rotation restricting means 23A made of a bolt or the like is inserted to regulate the amount of rotation of the first rotating shaft 13A.

At this time, the first rotating shaft rotation restricting means 23A
Is mounted on the casing 7 so as to be adjustable in and out, so that the clearance U between the first rotating shaft rotation restricting means 23A and the conical hole 13e can be adjusted. For example, by exposing the first rotation axis rotation restricting means 23A, as shown in FIG. 8, it is possible to increase from the solid line gap Ua to the dotted line gap Ub, whereby the amount of rotation of the first rotation axis 13A is reduced. It is possible to increase the maximum hydraulic pressure of the directional components to be output in the front and rear directions F and B from the hydraulic pressure generation means Hd, and to adjust the maximum speed of the vehicle to be further increased. Also, on the contrary, the first
By inserting the rotation axis rotation restricting means 23A, the maximum speed of the vehicle can be adjusted so as to be slow.

The first rotation shaft rotation restricting means 23A is configured to be able to move in the vertical direction shown in the figure by moving means 41 attached to the casing 7. In the moving means 41, a bracket 43 bent at a right angle is fixed to the casing 7, and a moving bolt 45 is screwed to the bracket 43. The tip of the moving bolt 45 is screwed to the lid 47. Lid 47 is mounting bolt 4
9, and the elongated hole 47 a of the lid 47 is guided by being inserted into the pin 51 fitted in the casing 7 in a pivotally tight manner, and can be moved in the vertical direction as shown by the rotation of the moving bolt 45. Is formed.

The moving bolt 45 has, for example, a screw screwed to the bracket 43 at the same pitch (for example, 1.5 pitch) of the right screw 45a, and a screw screwed to the lid 47 has a left screw 45b. (For example, 1.0 pitch). In accordance with this, bracket 4
3 is provided with a coarse pitch of the right-hand thread 45a, and the lid 47 is provided with a fine pitch of the left-hand thread 45b. Thus, when the moving bolt 45 rotates, the lid 4 can be finely moved with respect to the bracket 43 due to a pitch difference (for example, 0.5 pitch) between the bracket 43 and the lid 4.

By forming as described above, the maximum speed of the vehicle can be adjusted by the first rotation shaft rotation restricting means 23A entering and exiting the casing 7.
Further, as the first rotation axis rotation restricting means 23A moves to the moving means 41, the upper gap Up and the lower gap Ud in the figure can be adjusted as shown by the dashed line in FIG. By adjusting the amount of rotation of the shaft 13, for example, the forward speed and the reverse speed can be adjusted.

In the above embodiment, the pistons 65a, 65
Although b, 65c, and 65d have been described as being arranged on orthogonal lines in the forward and backward directions and the left and right directions, as another embodiment, as shown in FIGS.
a, 65b, 65c, and 65d are aligned at 45 degrees from the line in the forward-rearward direction H and the left-right direction F in which the axes Od and Oe are orthogonal to each other.
They may be staggered. In the above embodiment, the hydraulic mono-lever device 1 has been described.

[Brief description of the drawings]

FIG. 1 is a plan view of a hydraulic mono-lever device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an operation diagram of the hydraulic mono-lever device of FIG. 1;

FIG. 5 is a sectional view taken along line CC of FIG. 1;

FIG. 6 is a diagram illustrating the operation of the operation of the hydraulic mono-lever device according to the first embodiment of the present invention.

FIG. 7 is a side sectional view of a first rotation shaft rotation restricting means of the hydraulic mono lever device according to the second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a part of the first rotation shaft rotation restricting means.

FIGS. 9A and 9B are diagrams illustrating the configuration and operation of a hydraulic mono-lever device according to another embodiment.

FIGS. 10A and 10B are a plan view and a cross-sectional view of a conventional hydraulic mono-lever device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hydraulic type mono lever device, 3 ... Mono lever part, 5 ... Casing, 7 ... Disc plate, 7a ... Seat, 9 ...
Mono lever, 11: Rotating shaft for mono lever, 13: Rotating shaft, 15: Slit hole, 17: Hole for mono lever rotating shaft,
19 ... Bearing, 21 ... Rotation restricting means for mono lever, 23 ...
Rotating shaft rotation restricting means, 25 holding means, 27 roller bearing, 29 disk, 31 spring, 33 plug, 61
... Hydraulic body, 65a, 65b, 65c, 65d ... Piston, Hd ... Hydraulic pressure generating means.

Claims (5)

[Claims] When the mono lever (9) is arbitrarily tilted two-dimensionally in at least the front-rear direction and the left-right direction, the two levers according to the tilt direction and the tilt amount of the front-rear direction component and the left-right direction component, respectively. A drive signal generating means (Hd) for outputting a drive signal, and is rotatably supported by a monolever operating body (5), and rotates in either the front-rear direction or the left-right direction when the monolever (9) is operated. A rotating shaft (13) and the monolever (9), which is disposed orthogonal to a longitudinal axis of the rotating shaft, and is orthogonal to a direction in which the rotating shaft is rotated in the front-rear direction or the left-right direction. A mono-lever operating device comprising a mono-lever rotating shaft (11) for rotatably supporting an operation, wherein the mono-lever operating device (5) is rotatably supported by the mono-lever operating body (5). Contact time A monolever operating device, characterized in that a rotating shaft rotation restricting means (23) for restricting a movement amount is provided on the monolever operation main body (5). 2. The monolever operating device according to claim 1, wherein said rotation shaft rotation restricting means (23) can adjust a rotation amount. 3. A mono-lever rotation restricting means (21) for restricting the amount of rotation by surface contact with the mono lever (9) being provided on the rotation shaft (13).
Alternatively, the monolever operating device according to claim 2. 4. A traveling signal is output by operating a mono lever (9) in the front-rear direction by the rotating shaft (13), and
4. A drive signal generating means (Hd) for outputting a turning signal by operating a mono lever (9) in the left-right direction along the rotation axis (13). The described monolever operating device. 5. When a traveling signal is output by operating a mono lever (9) in the front-rear direction by the rotating shaft (13),
5. The monolever operating device according to claim 4, further comprising holding means (25) for holding the monolever (9) in the tilting operation position.