JP3035477B2 - Operating device for transmission for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device of a transmission for a vehicle, and more particularly, to a device for operating a transmission lever of the transmission.
The present invention relates to an operation device for a vehicle transmission configured to return to a neutral position when a brake pedal is depressed.

[0002]

2. Description of the Related Art As a conventional operating device for a speed change transmission of a vehicle, there is a shift device such as a lawn mower described in Japanese Patent Application Laid-Open No. 1-282039. The shift device such as a lawn mower includes shift urging means for urging the shift operating means to a neutral position by operating the shift operating means by operating the brake operating means.

FIG. 10 is an explanatory view of the operation of a brake operating means of a shift device of a conventional lawn mower or the like. FIG.
When the shift brake pedal 357 is depressed, the support lever 354 rotates in the illustrated direction, and the brake device operates via a rod (not shown) to perform braking. At this time, as shown in FIG. 10, since the support lever 354 rotates together with the brake pedal 357, the rods 368 and 370 connected by the shift urging means 369 are pulled. As a result, the guide shaft 372 slidably supported on the vehicle body 304 by the support plate 373 becomes the guide shaft 372.
The arm 374, 375 is pulled by the rod 370 together with the coil spring 380 supported by the coil spring 380, and both of the arms 374, 375 rotate in a direction approaching each other with the connecting pin 371 as a fulcrum. For this reason, the cam arm 37
7, 379 rotate around the end 332a of the guide shaft 332 as a fulcrum, and move in a direction to narrow the gap between them. The pin 349 of the lever 333 is sandwiched between the cam arms 377 and 379, and is positioned at a predetermined neutral position. Thereby, the fluid power transmission device is returned to the neutral state.

[0004]

However, in the conventional shift device such as the lawn mower, the cam arm 37 is not provided.
Since the rotation of 7, 379 must be symmetrical,
Guide shaft 372, support plate 373, and coil spring 380
Such an adjustment member that regulates the movement path of the connecting pin 371 of the arms 374 and 375 is required, so that the number of components is increased, and the adjustment members with high processing accuracy are required.

SUMMARY OF THE INVENTION An object of the present invention is to provide an operating device for a transmission of a vehicle with a working machine, which has a small number of parts and which can easily and accurately produce neutral without requiring high processing accuracy of the parts. It is in.

[0006]

In order to achieve the above object, a vehicle transmission operating device according to a first aspect of the present invention extracts power from an engine via a transmission and travels with the extracted power. The transmission is configured as follows:
An operation device for a transmission for a vehicle, comprising a connection unit that connects the brake pedal and the transmission such that the transmission changes from an arbitrary shift state to neutral in response to operation of the brake pedal. A first moving member connected to the brake pedal so as to move in one direction in conjunction with operation of the brake pedal, and being fixed to an operation lever of the transmission, and interlocking with movement of the operation lever. A rotating member that rotates about a lateral axis of the vehicle, a second moving member attached to the first moving member, and that moves in conjunction with the movement of the first moving member; An elongate hole provided in one of the rotating member and the second moving member, a pin provided in the other of the rotating member and the second moving member and engaging with the elongate hole, Transfer When the member moves in one direction, the movement of the first moving member and the rotating member is regulated so as to rotate the rotating member so as to move from the arbitrary shift position of the operation lever toward the neutral position. It is characterized by comprising a regulating member.

According to a second aspect of the present invention, in the operating device for a vehicle transmission according to the first aspect, the first moving member is rotatably mounted around a lateral axis of the vehicle. A first arm connected to the brake pedal so as to rotate in one direction in conjunction with the operation of the brake pedal, wherein the second moving member is connected to the first arm by the first arm. A second arm rotatably mounted about the other transverse axis of the vehicle,
The elongate hole is provided in the rotating member, and has an arc shape concentric with the lateral axis, and the pin is provided in the second member.
And the restricting member comprises a pin provided on the first arm and in contact with an edge of the rotating member.

According to a third aspect of the present invention, there is provided the operating device for a vehicle transmission according to the first aspect, wherein the first moving member moves in one direction in conjunction with the operation of the brake pedal. The second moving member is formed of a plate-like member fixed to the rod, and the elongated hole is provided in the plate-like member. Extending horizontally, the pin is provided on the rotating member, the regulating member is attached to the vehicle so as to be rotatable about a lateral axis of the vehicle, and one end is connected to the vehicle. A third arm rotatably mounted about a transverse axis of the third arm, and one end rotatably mounted about the other transverse axis of the vehicle at the other end of the third arm;
And a fourth arm having another elongated hole which is engaged with the pin and extends substantially horizontally.

According to the operating device for a vehicle transmission of the first to third aspects, the structure for connecting the brake pedal and the transmission so as to shift from an arbitrary shift state to neutral in conjunction with the operation of the brake pedal is reduced. It can be realized by the number of parts, and high-precision machining accuracy of parts can be eliminated.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to preferred embodiments shown in the drawings.

FIG. 1 is a side view of a vehicle with a working machine according to an embodiment of the present invention, and FIG. 2 is a plan view of the vehicle with a working machine according to the embodiment of the present invention. FIG. 3 is a plan view of a main part of the vehicle shown in FIG.

The vehicle 1 is fixed to a frame 2a extending in the longitudinal direction of the vehicle 1 and a rear portion of the frame 2a.
A pair of left and right side frames 2b and 2b extending in the longitudinal direction of the vehicle 1, and a cross frame 3a extending in the lateral direction of the vehicle 1 and connecting the two side frames 2b and 2b to each other;
3b and 3c are provided. The cross frame 3a includes a frame 2a and a side frame 2b,
The cross frame 3b is provided at the center of the side frame 2b, and the cross frame 3c is provided at the rear end of the side frame 2b near the fixed portion of the side frame 2b. On the body frame F,
A pair of left and right front wheels Wf, Wf as steering wheels and a pair of left and right rear wheels Wr, Wr as traveling drive wheels are appropriately mounted.

A floor panel 4, a handle post 5, and a seat base 6 are provided at the front of the body frame F. A seat 7 on which an occupant sits is provided on the seat base 6. A steering handle 8 for steering left and right front wheels Wf, Wf is provided above the handle post 5. The steering handle 8 may be an arbitrary one such as a round handle, a bar handle, a rectangular handle, and a lever handle.

An operation panel 9 is provided on the vehicle body frame F on the right side of the seat base 6. The operation panel 9 includes a hydrostatic continuously variable transmission (HST) M described later.
HST operation lever 98 and a lifting / lowering button 10 for a working machine, which will be described later.

On the left side of the seat base 6 and above the body frame F, a PTO (power take-out) clutch CL interposed in a power transmission path to a working machine, which will be described later, is turned ON / O.
A PTO clutch lever 72 for performing FF is provided.

A single-cylinder four-cycle engine E is mounted on the rear upper surface of the body frame F such that the crankshaft 11 extends in the lateral direction of the vehicle 1 and the cylinder 12 faces obliquely rearward and upward. On top of the engine E, a fuel tank 13, an air cleaner 14, and a muffler 15 are mounted. Vehicle body claim F below engine E
A hydrostatic continuously variable transmission (HST) M with a transmission that converts the driving force of the engine E into a hydraulic pressure and drives the left and right rear wheels Wr, Wr is mounted below.
The continuously variable transmission M independently controls the rotational speeds of the left and right rear wheels Wr, Wr. A rotary working machine R driven by the engine E is connected to a rear end of the body frame F.

A work implement elevating shaft 22 extending in the lateral direction of the vehicle 1 is rotatably supported by a bracket 21 projecting rearward from the rearmost cross frame 3c. A pulley 23 is provided on the crankshaft 11 of the engine E, and a pulley 24 is provided on the work implement elevating shaft 22. Pulley 2
The pulley 3 and the pulley 24 are connected via an endless belt 25. Adjustment of the tension of the endless belt 25 is performed by PTO.
This is performed by the clutch CL.

A rear chain case 31 is connected via a middle cylinder 30 to a rear end of a front chain case 29 pivotally supported by the work machine elevating shaft 22 so as to be vertically swingable. The rotary working machine R including the intermediate cylinder 30 and the rear chain case 31
1 is driven up and down by an elevating cylinder 32 mounted therebetween. That is, the bracket 33 is attached to the work implement elevating shaft 22.
Are pivotally supported so that they can swing up and down.
Is connected to the rear chain case 31. The lifting cylinder 32 is connected between the bracket 33 and the bracket 21. Therefore, when the bracket 33 is swung upward by the lifting cylinder 32, the bracket 33 is swung upward together with the work implement R. The lifting cylinder 3
The work implement R can freely swing upward around the work implement elevating shaft 22 due to the reaction force from the ground even if the 2 does not operate.

A plurality of tillage blades provided at the rear end of the rear chain case 31. . . Is the front chain case 2
9, connected to the working machine elevating shaft 22 by a chain transmission mechanism (not shown) housed in the intermediate cylinder 30 and the rear chain case 31, and driven to rotate. Reference numeral 39 in the figure indicates a tilling blade 38. . . , Reference numeral 40 denotes a resistance bar, and reference numeral 41 denotes a flat plate. The tilling blade 38 includes a forward tilling blade and a reverse tilling blade by a coaxial forward / reverse tilling mechanism (not shown).

Hereinafter, the structure of the brake pedal operation system BP will be described with reference to FIGS. 3, 4, and 5. FIG. 4 is a perspective view of the brake rod barrel 45. FIG. 5 is an explanatory diagram of the configuration of the brake pedal operation system BP and the HST operation system.

Brackets 44, 44 are fixed to both ends of the cross frame 3a, and a brake rod shaft cylinder 45 is rotatably attached to the brackets 44, 44. The brake rod barrel 45 extends in the lateral direction of the vehicle 1. A first lever 46, a second lever 47, and a third lever 48 are fixed to the brake rod barrel 45 from the right end of the brake rod barrel 45 on the right side of the vehicle 1 and on the left side of the vehicle 1 Brake rod barrel 4
The fourth lever 49 is fixed to the left end of the fifth lever 5. Each lever 46, 47, 48, 49 extends downward in a suitable direction as shown in FIG.

In FIG. 5A, a bracket 50 extending downward is fixed to the right side of the front of the frame 2a. The bracket 50 includes a brake pedal lever 51 and a brake pedal arm 52 integrated with each other.
Are mounted rotatably about a lateral axis 36 of The brake pedal lever 51 and the brake brake pedal arm 52 each face substantially upward. A brake pedal 53 is fixed to an upper end of the brake pedal arm 52. One end of a tension spring 54 is locked to the upper end of the brake pedal bar 51, and the other end of the tension spring 54 is locked to the right side of the frame 2a behind the bracket 50. Thereby, the brake pedal 53
Is always biased upward (OFF position). One end of a brake pedal rod 55 is further rotatably attached to the upper end of the brake pedal bar 51 around a lateral axis of the vehicle 1.
The other end of 5 is attached to a third lever 48 so as to be rotatable around a lateral axis of the vehicle 1. By the action of the tension spring 54, when viewed from the left side of the vehicle 1 (in FIG. 5), the brake pedal 53 is urged clockwise and the brake rod barrel 45 is urged counterclockwise.

Hereinafter, the configuration of the brake operation system B will be described with reference to FIG.

5 (A) and 5 (B), as described above, the hydrostatic continuously variable transmission (HST) M provided with a transmission provided below the engine E incorporates an appropriate brake. When the brake lever 60 fixed to the input shaft of the brake is rotated clockwise as viewed from the left side of the vehicle 1 (in FIG. 5), the brake is turned on, and when the brake lever 60 is rotated counterclockwise, the brake is turned off. Becomes The brake lever 60 extends substantially upward. This brake lever 60
Is urged clockwise in FIG. 5 by the urging force of the tension spring 54 via a pin and a washer fixed to the brake rod 62. A hole is provided at the tip of the brake lever 60 in the longitudinal direction of the vehicle 1. One end of a brake rod 62 is passed through this hole, and the other end of the brake rod 62 is rotatably connected to a second lever 47 fixed to a brake rod barrel 45 so as to be rotatable around a lateral axis of the vehicle 1. ing. A buffer spring 64 is mounted between one end of the brake rod 62 and the brake lever 60.

The operation according to the structure of the brake operation system B will be described.

When the brake pedal 53 is depressed, the brake pedal rod 55 and the brake rod 62 are pulled in the forward direction of the vehicle 1, and the tensile force is transmitted to the brake lever 60 via the spring 64, and the brake lever 6
By turning 0 counterclockwise, the brake is turned on. The spring 64 serves as a buffer. Brake pedal 5
3 is released, the brake pedal 53 is pushed up by the tensile force of the tension spring 54, and the brake pedal rod 55 and the brake rod 62 are returned to the rear of the vehicle 1, and as a result, the brake lever 60 is moved to the position shown in FIG.
In (B), the urging force of the tension spring 54 rotates clockwise through a pin and a washer fixed to the brake rod 62, thereby turning off the brake.

Hereinafter, the PT will be described with reference to FIGS.
The configuration of the O clutch operation system P will be described. FIG. 6 is an explanatory diagram of the configuration of the PTO clutch operation system P, and FIG. 7 is a partially exploded perspective view of the PTO clutch operation system.

The PTO clutch CL includes a bracket 26 fixed on the cross frame 3c on the left side of the vehicle 1.
And an arm 27 rotatably attached to a bracket 26 about a lateral axis of the vehicle 1, and a tension roller 28 rotatably provided at one end of the arm 27 and abutting against the lower surface of the endless belt 25. Become.

In FIG. 6, the left side of the vehicle 1, the frame 3
A bracket 71 is fixed to the vehicle body structure 70 at a predetermined distance from an appropriate vehicle body structure 70 fixed to the vehicle body frame F at an appropriate height above the frame a. In FIG. 7, holes are provided at the corresponding positions of the bracket 71 and the vehicle body structure 70, respectively, and the shaft portion 7, which is one end of an L-shaped PTO clutch handle 72, is provided in these holes.
2a is rotatably inserted. Clutch handle 7
The other end of 2 forms a grip portion 72b. The configuration described below is such that the PTO clutch CL is turned on when the grip 72b is tilted forward of the vehicle 1, and the PTO clutch CL is raised when the grip 72b is raised upward of the vehicle 1.
It is set so that the TO clutch CL is turned off.

At the tip of the shaft 72a of the clutch handle 72 inside the vehicle body structure 70, a clutch lever 73 is provided.
Is fixed at almost its center. The clutch handle 72 and the clutch lever 73 are
The clutch lever 73 is fixed in a rotational positional relationship such that the clutch lever 73 extends substantially in the longitudinal direction of the vehicle 1 when the grip portion 72b is tilted forward. In the following description of the configuration,
For convenience, the description will be made on the assumption that the grip portion 72b of the clutch handle 72 is tilted forward.

The front end of the clutch lever 73 has a wire 7
One end of the wire 4 is fixed, and the other end of the wire 74 is connected to the other end of the arm 27 of the PTO clutch CL via a buffer spring 75. The wire 74 is appropriately passed through a guide tube 76 fixed to the vehicle body structure 70 of the vehicle 1. Further, a tension spring 77 is attached between a front end of the clutch lever 73 and a portion of the vehicle body structure 70 obliquely below the shaft portion 72b of the clutch handle 72.

A clutch arm 78 is rotatably inserted into the shaft 72a between the vehicle body structure 70 and the bracket 71. The clutch arm 78 extends rearward and downward from the shaft 72a. The lower end of the clutch arm 78 and the lower end of the fourth lever 49 attached to the brake rod barrel 45 are connected to each other by a clutch rod 82 so as to be rotatable around the lateral axis of the vehicle 1.

With this configuration, the brake pedal 5
When the brake pedal 3 is depressed, the brake pedal rod 55 and the clutch rod 82 move in the forward direction of the vehicle 1, and the clutch arm 78 rotates clockwise as viewed from the left side of the vehicle 1 (in FIG. 6) to reach the A rotation position. When the depression force of the brake pedal 53 is released, the brake pedal rod 55 and the clutch rod 82 move rearward of the vehicle 1 by the action of the tension spring 54, and the clutch arm 7
8 rotates counterclockwise as viewed from the left side of the vehicle 1 (in FIG. 6) and reaches the B rotation position.

The arm 78 is provided with a concentric arc-shaped long hole 79 in the shaft portion 72b. Similarly, a concentric arc-shaped long hole 80 is provided in the shaft portion 72b of the vehicle body structure 70 at a position opposed to the long hole 79. On the other hand, a projection 81 is provided on the rear end of the clutch lever 73, and the projection 81 is engaged with the long holes 80 and 79 described above.

The range of the length of the long hole 79 is such that when the arm 78 is at the aforementioned B rotation position,
When the clutch lever 73 is turned up when the PTO clutch is OFF, the clutch lever 73 is raised from the highest position that the projection 81 of the clutch lever 73 can take when the TO clutch is turned forward when the TO clutch is ON. 73
To the lowest position that the projection 81 can take.

The operation according to the configuration of the PTO clutch operation system P will be described.

First, when the brake pedal 53 is off, the clutch arm 78 is at the B rotation position by the action of the tension spring 54. At this time, the clutch handle 72 is
It can be arbitrarily located at both the O clutch ON position and the PTO clutch OFF position. However, when the clutch handle 72 is moved from the PTO clutch ON position to the PTO clutch O
When rotating to the FF position, the clutch handle 72 passes through a thought point of the tension spring 77, so that the tension of the tension spring 77 stably holds the clutch handle 72 at the PTO clutch OFF position. Similarly, when the clutch handle 72 rotates from the PTO clutch OFF position to the PTO clutch ON position, the clutch handle 72 is similarly stably held at the PTO clutch ON position.

When the brake pedal 53 is ON,
The brake pedal rod 55 and the PTO rod 82 move in the forward direction of the vehicle 1 due to the depressing force of the brake pedal 53, and the arm 78 rotates clockwise from the B rotation position to the A rotation position. At this time, if the clutch handle 72 is at the PTO clutch ON position, the clutch arm 78
With the clockwise rotation of, the projection 81 located at the highest position in the elongated hole 79 rotates clockwise to rotate the clutch lever 73,
That is, the clutch handle 72 is rotated clockwise. As a result, the clutch handle 72 is connected to the tension spring 77.
And the projection 81 rotates to the position where the projection 81 abuts on the lower end of the long hole 80 of the vehicle body structure 70, that is, the PTO clutch OFF position by the tensile force of the tension spring 77.
Therefore, when the brake pedal 53 is depressed, the clutch handle 72 automatically moves from the PTO clutch ON position to the PT
Move to the O-clutch OFF position.

The clutch handle 72 as described above is used.
PTO clutch ON position and PTO clutch OFF
The movement between the positions controls the operation of the PTO clutch CL via the wire 74 corresponding to the movement, and the operation of the PTO clutch CL raises and lowers the rotary actuator R according to the operation. Needless to say.

Hereinafter, the HS will be described with reference to FIGS.
The structure of the T return operation system HS will be described. FIG.
It is a partial exploded perspective view of the T return operation system HS.

2, 3 and 5, a rotating shaft 91 extending in the lateral direction of the vehicle 1 is rotatably attached to a hole provided in the vehicle body structure 70 on the right side of the vehicle 1 near the operation panel 9. A substantially fan-shaped flat plate arm 92 is fixed to the rotating shaft 91. Further, the rotating shaft 91
A hole provided in the vehicle body structure 70 below the vehicle 1
A rotatable shaft 94 extending in the lateral direction is rotatably mounted, and a flat arm 93 is fixed to the rotatable shaft 94.

A pin 95 is provided at a key portion of the substantially fan-shaped flat plate arm 92 in the outer direction of the vehicle body structure 70 in parallel with the surface of the arm 92 and at intervals.
96 (FIG. 8). A hydrostatic continuously variable transmission (HST) operation lever 98 extending upward is rotatably attached to the pin 95 around the pin 95. The HST operation lever 98 uses a body structure 70 instead of a spring.
It is biased toward the inside.

A grip portion is provided at the upper end of the HST operation lever 98. In the configuration described below, when the HST operation lever 98 is tilted in the forward direction of the vehicle 1, the HST is in a forward position where the HST performs a forward operation.
When the HST is raised toward the upper side of the vehicle 1, the HST is in the neutral position in the neutral position, and when the HST operation lever 98 is tilted rearward of the vehicle 1, the HST
Is set to the reverse position where the reverse operation is performed. A bracket 99 is provided on the outer upper end of the fan portion of the arm 92, and the bracket 99 and the operating end of the HST (not shown) are connected by a rod 100 (FIG. 3). Thereby, the HST operation lever 98 as described above is provided.
The movement between the forward position, neutral position and reverse position of
The HST is operated via the rod 100 in accordance with the movement.

The HST operation lever 98 and the arm 92 are
When the HST operation lever 98 is tilted forward, the fan of the arm 92 is fixed in a rotational positional relationship such that it faces downward and forward of the vehicle 1. In the following description of the configuration, it is assumed that the HST return lever 98 is tilted forward for convenience.

The arm 93 extends obliquely downward and forward. Upper end of arm 93 and brake rod barrel 4
5 and the tip of the first lever 46 fixed to the vehicle 1 respectively.
The return rod 101 is rotatable around the horizontal axis of the
Are linked by The return rod 101
Turnbuckle mechanism 1 for adjusting the length of itself
02 is provided. A hole 103 is provided at the lower end of the arm 93 (FIG. 8). A pin 10 abutting on the side surface of the fan of the arm 92 is provided at the upper end of the arm 93.
4 is fixed.

The arm 92 is provided with a long hole 105 concentric with the rotating shaft 91. Arm 92 and Arm 9
3 is connected via a rod 109 having, at one end, a pin 107 which engages with the hole 103 at the lower end of the arm 93 and at the other end a pin 108 which engages with the elongated hole 105.

The operation according to the configuration of the HST return operation system HS will be described.

The range of the length of the long hole 105, the length of the return rod 101, and the length of the rod 109 are set so as to satisfy the following relationship.

When the brake pedal 53 is OFF, the brake pedal rod 55 and the return rod 101 move rearward of the vehicle 1 by the tensile force of the tension spring 54,
When viewed from the left side of the vehicle 1 (in FIG. 5), the arm 93 rotates clockwise and is at the C rotation position. HST
The operation lever 98 can be tilted forward until the lower side of the fan of the arm 92 comes into contact with the pin 104 and reaches the advanced position (D rotation position). It can be raised until it comes into contact and reaches the reverse position (E rotation position).

When the HST return lever 98 is moved to the neutral position and further to the reverse position, the HST operation lever 98 is tilted outward against the urging force of the spring at the neutral position, and the lever movement guide slit 3 on the operation panel is moved.
7, the HST operation lever 98 is moved to the reverse position after shifting to the reverse side (FIG. 2).

When the brake pedal 53 is depressed,
Due to the depressing force of the brake pedal 53, the brake pedal rod 55 and the return rod 101 move in the forward direction of the vehicle 1, and the arm 93 rotates counterclockwise to
Move from the rotation position to the F rotation position. The arm 92 is pushed up by the pin 104, rotates clockwise, and moves from the D rotation position to the G rotation position. On the other hand, the rod 109, that is, the pin 108, is lowered by the counterclockwise rotation of the arm 93. Accordingly, the arm 92 is prevented from rotating clockwise at the G rotation position by the pin 108 abutting on the lower end of the elongated hole 105. At this time, since the arm 92 is prevented from rotating counterclockwise by the pin 104, the arm 92 is sandwiched between the pin 104 and the pin 108.
Therefore, the HST return lever 98 is reliably positioned at the neutral position.

With the above operation, when the brake pedal 53 is depressed, the HST return lever 98 automatically moves from the forward position to the neutral position.

It is needless to say that the HST return lever 98 is moved between the forward position, the neutral position, and the reverse position by operating the HST via the rod 100 in accordance with the movement.

Hereinafter, a modification of the HST return operation system will be described with reference to FIG.

In this modification, the following configuration is provided instead of the HST operation system HS in the above-described embodiment.
Other configurations are basically the same as those of the above-described embodiment. In the following description, the same components as those of the above-described embodiment are denoted by the same reference numerals in the drawings, but partially different components. The reference numerals used in the above-described embodiments are the reference numerals obtained by adding 100 to the reference numerals in the drawings, and the reference numerals of the 200s are used for the components specific to this modification.

In FIG. 9, a rotary shaft 191 extending in the lateral direction of the vehicle 1 is rotatably mounted in a hole provided in the vehicle body structure 70 on the right side of the vehicle 1 and near the operation panel 9. A flat arm 19 is attached to the shaft 191.
2 is fixed.

The arm 1 extends outward from the vehicle body structure 70.
Pins 95 are attached to the 92 by brackets 96, 96 at intervals in the horizontal direction parallel to the surface of the arm 192 (FIG. 3). An HST operation lever 98 extending upward is rotatably attached to the pin 95 around the pin 95. The HST operation lever 98 is urged toward the inside of the vehicle body structure 70 by a spring (not shown).

A grip portion is provided at the upper end of the HST operation lever 98. The configuration described below is such that when the HST operation tray 98 is tilted forward of the vehicle 1, the HST is in a forward position where the HST performs a forward operation, and when the HST operation lever 98 is raised upward of the vehicle 1, the HST operation lever Is set to a neutral position in neutral, and the HST is set to a reverse position where the HST performs a reverse operation when the HST operation lever 98 is tilted backward of the vehicle 1. Arm 192
A bracket 99 is provided at the upper end on the outside of the HST.
0 (FIG. 3). Accordingly, the movement of the HST operation lever 98 between the forward position, the neutral position, and the reverse position as described above activates the HST via the rod 100 in accordance with the movement.

In the following description of the structure, it is assumed that the HST operation lever 98 is tilted forward for convenience.

A rotating shaft 220 is rotatably mounted on the vehicle body structure 70 below and below the rotating shaft 191 around the transverse axis of the vehicle 1, and a plate arm 221 is rotatably mounted on the rotating shaft 220. ing. The plate-shaped arm 221 extends in a substantially vertical direction, and its upper end is located near the lower part of the arm 192 attached to the rotation shaft 191. One end of a rod 223 is rotatably connected to the lower end of the plate-shaped arm 221 around the horizontal axis of the vehicle 1, and the other end of the rod 223 is connected to the first arm 46 of the brake rod arm 45. It is rotatably mounted around a lateral axis of the vehicle 1. HST operation handle 9
A plate-like member 224 that extends upward is fixed to the rod 223 below the position 8. The plate-like member 224 is approximately equal in length to the arm 221. The plate-like member 224 is provided with a long hole 225 that extends substantially in the horizontal direction, the lower edge is horizontal, and the upper edge is inclined backward and downward. Also,
One end of the horizontally extending arm 226 is connected to the upper end of the arm 221 so as to be rotatable around a lateral axis of the vehicle 1. At the other end of the arm 226, an elongated hole 227 extending substantially horizontally is provided.

On the other hand, a pin 228 is provided at the lower end of the arm 192 toward the inside of the vehicle 1, and the pin 228 is connected to the elongated hole 225 of the plate member 224 and the arm 2.
26 are engaged with both long holes 227.

The operation according to the configuration of the HST return operation system will be described.

The range of the length and width of the elongated holes 225 and 227 is set so as to satisfy the following relationship.

When the brake pedal 53 is OFF, the brake pedal rod 55, the rod 223, and the plate member 224 are positioned rearward of the vehicle 1 by the pulling force of the tension spring 54, and the plate member 224 is at the I position. Arm 226
Since the plate-shaped arm 221 rotates counterclockwise when viewed from the side of the vehicle 1, it moves to the front of the vehicle 1 and is at the J position. In this state, the HST operation lever 98 is
8 abuts against the rear side edge of the slot 225 of the plate member 224 and can be tilted forward until it reaches the forward maximum speed position,
Conversely, it can be raised until the pin 228 contacts the front edge of the elongated hole 227 of the arm 226 and reaches the reverse maximum speed position.

When the HST return lever 98 is further moved to the reverse position, the HST return lever 98 is tilted outward against the urging force of the above-mentioned spring at the neutral position, and the lever movement guide slit 37 (FIG. ) After shifting to the reverse side, the HST operation lever 98 is moved to the reverse position.

On the other hand, when the brake pedal 53 is depressed, the brake pedal rod 55, the rod 223 and the plate
4 moves in the forward direction of the vehicle 1, and the plate member 224 moves to the K position. The arm 226 is such that the arm 221 is the vehicle 1
Rotates clockwise when viewed from the side of the vehicle 1 and moves backward of the vehicle 1 to the position L. The pin 228 of the arm 192 is moved by the rear edge of the long hole 225 of the plate-shaped member 224 toward the rear of the vehicle 1 and by the front edge of the long hole 227 of the arm 226 toward the front of the vehicle 1. As a result, the HST operation lever 198 is reliably positioned at a position relative to the neutral position.

With the above operation, when the brake pedal 53 is depressed, the HST operation lever 198 automatically moves from the forward position to the neutral position.

The HST operation lever 98 as described above
The movement between the forward position, neutral position and reverse position of
Activating the HST via the rod 100 in accordance with the movement is the same as in the above-described embodiment.

The embodiment of the present invention has been described above in detail.
The present invention is not limited to the above embodiments,
Various design changes can be made.

For example, in the embodiment, a four-wheeled vehicle has been described as an example, but in the present invention, a three-wheeled vehicle having one steering wheel, front wheels Wf, W
The present invention can also be applied to a four-wheel vehicle in which f is a driving wheel and rear wheels Wr and Wr are steering wheels, and a vehicle in which the driving wheel is a crawler.

In this embodiment, a hydrostatic continuously variable transmission (HST) has been described as an example of the continuously variable transmission.
Instead, any continuously variable transmission such as a CVT (belt type continuously variable transmission), a ring cone type continuously variable transmission, a toroidal type continuously variable transmission, and a friction type continuously variable transmission can be adopted.

[0072]

As described above in detail, according to the operating device for a vehicle transmission of the first to third aspects, the number of components of the operating device for the transmission of the vehicle can be reduced, and the number of components can be reduced. High processing accuracy can be eliminated. As a result, neutral can be easily provided with high accuracy.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle with a working machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the vehicle with a working machine according to the embodiment of the present invention.

FIG. 3 is a plan view of a main part of the vehicle shown in FIG. 2;

FIG. 4 is a perspective view of a brake rod barrel 45;

FIG. 5 is a brake pedal operation system BP and HST.
FIG. 3 is an explanatory diagram of a configuration of an operation system.

FIG. 6 is an explanatory diagram of a configuration of a PTO clutch operation system P.

FIG. 7 is a partially exploded perspective view of a PTO clutch operation system.

FIG. 8 is a partially exploded perspective view of the HST return operation system HS.

FIG. 9 is a partially exploded perspective view of a modification of the HST return operation system.

FIG. 10 is an explanatory diagram of an operation of a brake operating means of a shift device of the conventional lawn mower or the like.

[Explanation of symbols]

 B Brake operation system BP Brake pedal operation system CL PTO clutch E Engine F frame HS HST return operation system M Hydrostatic continuously variable transmission (HST) P PTO clutch operation system R Rotary work machine Wf Front wheel Wr Rear wheel 1 Vehicle 2a, 2b Side frame 3a, 3b, 3c Cross frame 4 Floor panel 5 Handle post 7 Seat 9 Operation panel 45 Brake rod barrel 53 Brake pedal 60 Brake lever 72 PTO clutch handle 98 HST operation lever 221 226 arm 223 Rod 225, 227 Long hole 228 pins

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI G05G 5/00 G05G 5/00 D (72) Inventor Katsuhisa 1-4-1 Chuo, Wako-shi, Saitama Pref. References JP-A-6-137411 (JP, A) JP-A-1-282039 (JP, A) JP-A-3-41257 (JP, U) JP-A-2-10125 (JP, U) JP-A 63-39724 (JP, U) Japanese Utility Model 60-133235 (JP, U) Japanese Utility Model Application Hei 3-52462 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16H 59/00 -59/12 B60K 20/02 G05G 5/00

Claims (3)

(57) [Claims] 1. A vehicle according to claim 1, wherein power is taken out of an engine via a transmission, and the vehicle runs with the taken-out power. An operating device for a transmission for a vehicle, comprising a connecting means for connecting the brake pedal and the transmission so as to be neutral, wherein the connecting means moves in one direction in conjunction with operation of a brake pedal. A first moving member connected to a brake pedal and a rotation that is fixed to an operation lever of the transmission and that rotates about a lateral axis of the vehicle in conjunction with movement of the operation lever. A second moving member attached to the first moving member, the second moving member moving in conjunction with the movement of the first moving member, and a second moving member; A long hole provided on the other side, and provided on the other of the rotating member and the second moving member,
A pin engaged with the elongated hole, and the operating lever is configured to rotate the rotating member to move from an arbitrary shift position toward a neutral position when the first moving member moves in one direction. An operating device for a vehicular transmission, comprising: a first moving member; and a regulating member that regulates movement of the rotating member. 2. The vehicle according to claim 1, wherein the first moving member is rotatably mounted around a lateral axis of the vehicle, and the first moving member rotates in one direction in response to operation of the brake pedal. The first arm (9
3) wherein the second moving member comprises a second arm (109) rotatably mounted on the first arm about another lateral axis of the vehicle, wherein the slot is The pin (108) is provided at the tip of the second arm (109), and is provided at the tip of the second arm (109). 2. The operating device for a vehicle transmission according to claim 1, further comprising a pin provided on the first arm and abutting against an edge of the rotating member. 3. The first moving member comprises a rod connected to the brake pedal so as to move in one direction in conjunction with operation of the brake pedal, and wherein the second moving member is It consists of a plate-like member fixed to a rod, the elongated hole is provided in the plate-like member and extends substantially horizontally, the pin is provided in the rotating member, and the regulating member is A third arm rotatably mounted on the vehicle about a transverse axis of the vehicle, one end of which is rotatably mounted on the vehicle about another transverse axis; and A fourth arm rotatably mounted on the other end of the third arm about a further lateral axis of the vehicle, the other end engaging the pin and having another elongated hole extending substantially horizontally. It is characterized by consisting of an arm The operation device for a vehicle transmission according to claim 1.