JP2003104085A - Controlling device of running vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately switch a forward/backward switching device 3 between forward and backward sides at a tilting attitude without causing tilting or height change of a forward/backward lever shaft with respect to a handle post when the handle post is tilted. SOLUTION: A support block 5 is disposed on a running machine 4 having the forward/backward switching device 3 in a transmission 2, the handle post 7 is supported by the support block 5 via a tilt spindle 6. The forward/backward lever shaft 9 is supported by the handle post 7 via a support member 8 turnably and tiltably with the handle post 7, The forward/backward lever shaft 9 is interlocked with and connected to the forward/backward switching device 3 through an interlocking means 10 so that the switching devise 3 is switched forward or backward by turning of the lever shaft 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a traveling vehicle such as a tractor.

[0002]

2. Description of the Related Art In this type of prior art, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Application Laid-Open No. 165130, a support is provided on a traveling machine body provided with a forward / reverse switching device for a transmission, and a handle post is supported on the support by a tilt support shaft. An upper part of the forward / backward lever shaft is rotatably supported via a supporting member, and the forward / backward lever shaft and the forward / backward switching device are interlocked so that the forward / backward switching device can be switched forward / backward by the rotation of the forward / backward lever shaft. They are linked together by means.

The interlocking means has a spline shaft supported by the mission case, and a universal joint axially slidably mounted on the spline shaft and connected to the forward / backward lever shaft.

[0004]

In the above prior art, when the handle post is tilted, the forward / backward lever shaft can also be tilted. However, since the forward / backward lever shaft is supported only by the upper part on the handle post, the mission A tilt and a height change different from those of the handle post occur with respect to the case, and this is absorbed by the axial sliding of the spline shaft and the universal joint. However, it is difficult to completely absorb tilting, height change, etc. of the forward / reverse lever shaft, and therefore, the forward / reverse lever shaft operates the forward / reverse switching device to rotate in the forward direction and reverse direction. The movement angle may differ.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a traveling vehicle control device capable of solving the problems of the prior art. According to the present invention, a forward / reverse lever shaft is supported on a handle post via a support member so as to be integrally tiltable so that the forward / backward lever shaft does not tilt or change in height with respect to the handle post. An object is to provide a control device for a vehicle.

[0006]

A first concrete means for solving the problems in the present invention is to provide a support base 5 on a traveling machine body 4 provided with a forward / reverse switching device 3 in a transmission 2, and this support base. 5, a handle post 7 is supported via a tilt support shaft 6, and a forward / backward lever shaft 9 is supported on the handle post 7 via a support member 8 so as to be rotatable and integrally tiltable with the handle post 7. The forward-reverse lever shaft 9 and the forward-reverse switching device 3 are interlocked by the interlocking means 10 so that the forward-reverse switching device 3 can be switched forward and backward by the rotation of the forward-reverse lever shaft 9.

As a result, when the handle post 7 is tilted, the forward / backward lever shaft 9 also tilts integrally with the handle post 7, and the forward / backward lever shaft 9 is tilted with respect to the handle post 7, or the height thereof is increased. It is possible to accurately switch the forward / reverse switching device 3 between the forward drive side and the reverse drive side in a tilted posture without changing. A second concrete means for solving the problems in the present invention is, in addition to the first concrete means, the forward-reverse switching device 3 is a hydraulic switching type and has a forward-reverse control valve 11 for switching it. ,
The interlocking means 10 includes an arm 14 provided on the forward / backward lever shaft 9, an oscillating body 15 connected to the arm 14 and pivotally supported with respect to the handle post 7, and an oscillating body 15 of the oscillating body 15.
And a cable 16 connecting the forward and backward control valve 11 with each other.

As a result, the hydraulic forward / reverse switching device 3 can be controlled by the manually operated forward / backward control valve 11, and the forward / backward control valve 11 can be operated by the mechanical interlocking means 10. The third concrete means for solving the problems in the present invention is, in addition to the first or second concrete means, the supporting member 8 having a pair of upper and lower portions, and the forward / backward lever shaft 9 having the ball receiving member 8A.
That is through support. As a result, the forward-reverse lever shaft 9 can be reliably integrated with the handle post 7, and the forward-reverse lever shaft 9 can be operated smoothly.

A fourth specific means for solving the problems in the present invention is, in addition to the second specific means, the traveling machine body 4 is provided with a hydraulic switching transmission 17, and a transmission for switching the transmission 17 is used. Control valve 18 and this shift control valve 18
And a gear shift operation means 20 for operating the gear shift control means 20 via a cable 19, a forward and backward control valve 11 and a gear shift control valve 18 are provided on the traveling machine body 4, and a spool 11A of the forward and backward control valve 11 is provided. The first relay 22 connected to the pin 21 and swung by the interlocking means 10, the spool 18A of the speed change control valve 18 and the pin 23 connected to the speed change operation means 20.
The second relay body 24 that is swung by the support shaft 2
5, 26, and at least one of the support shafts 25, 26 is provided to prevent both relay bodies 22, 24 from coming off and both pins 21,
That is, a retaining body 27 for retaining 23 is provided.

Thus, the manually operated forward-reverse control valve 1
1 and each spool 11A, 18A of the shift control valve 18,
The interlocking connection between the interlocking means 10 and the gear shift operating means 20 for operating the relays 22 and 24 can be easily and surely ensured.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 30 denotes a tractor with a cabin, which is illustrated as a traveling vehicle.
1, clutch housing 32, mission case 33,
A front axle frame and the like are directly connected to form a vehicle body, and front wheels and rear wheels 34 are suspended to form a traveling body 4. At the rear of the traveling machine body 4, a cabin 36 is mounted via a cushion on the rear side of a hood 35 that covers the engine 31, and a cabin 38 is mounted on a floor seat 37 of the cabin 36.
Is arranged, and the control device 1 is arranged in front of the driver's seat 38.

A hydraulic device 28 for raising and lowering the rear-mounted working machine is provided in the upper rear part of the traveling machine body 4 and below the driver's seat 38. The forward-reverse control valve 11 and the shift control valve 18 are provided in front of the hydraulic device 28. Etc. are arranged. In the clutch housing 32 and the transmission case 33, the engine 3
A transmission 2 of a traveling transmission system and a PTO transmission system for transmitting the power from 1 to the front wheels and / or the rear wheels 34 is built in. The traveling transmission system includes a forward / reverse switching device 3 that converts engine power into forward rotation and reverse rotation, a main transmission that shifts to three or four stages, and an auxiliary transmission that further reduces speed.
It has a transmission device 17 such as a super speed reducer. The forward-reverse switching device 3 and the transmission device 17 both have hydraulic clutches,
The hydraulic switching type is controlled by the forward / reverse control valve 11 and the shift control valve 18, respectively.

A damper 29 is provided between the engine 31 and the forward / reverse switching device 3, and the forward / reverse switching device 3 also functions as the main clutch of the traveling transmission system. However, instead of the damper 29, the main clutch is used. May be provided. Figure 1
9, the front lower wall 36A of the cabin 36 is a partition wall between the cabin and the engine room, and the hood 3
It is arranged on the traveling machine body 4 at the rear end of 5, and the support base 5 is mounted on the back surface of the front lower wall 36A. The support base 5 is formed of a plurality of plate materials, etc., and supports most of the members constituting the control device 1, and also controls the control panel 4.
3 and the control section cover 44 are attached.

Reference numeral 39 denotes a pedal shaft supported by the support base 5 and the auxiliary support base 40. A clutch pedal 41 is supported on the left side of the pedal shaft 39, and a pair of left and right break pedals 42 is supported on the right side in a suspending manner. There is. This pedal shaft 39
The handle post 7 is arranged on the rear side. A handle shaft 45 is rotatably supported by a bearing on the handle post 7, and a handle 46 is provided on an upper end of the handle shaft 45.
Is provided, and the lower end of the handle shaft 45 is interlockingly connected to operate a steering control valve (not shown).

An attachment member 47 bent in an S shape is fixed to the lower portion of the handle post 7. The mounting member 47 is a bent band plate, and the upper and lower parts thereof are arranged in parallel with the handle post 7, and the lower part is pivotally supported by the support base 5 via the tilt support shaft 6, Can be tightened and loosened with respect to the support base 5 via a tilt fixture 48. The tilt fixing device 48 has a screw member 48A that penetrates the hole 49 of the support base 5 and is screwed into the mounting member 47, and a tilt handle 50 fitted to the screw member 48A. Mounting member 4 by moving
7 is pressed and fixed to the support base 5. The screw member 48A
The hole 49 of the support base 5 through which is inserted is a circular arc hole whose center of curvature is the tilt support shaft 6.

By rotating the tilt handle 50 to loosen the screw member 48A, the mounting member 47 and the handle post 7 are swung back and forth within the range of the circular arc hole 49 about the tilt support shaft 6 to move the handle. The position of the mounting member 47 and the handle post 7 can be fixed to the support base 5 at the tilted position by fastening the screw member 48A with the tilt handle 50. A pair of upper and lower support members 8 are fixed to the outer peripheral surface of the handle post 7,
A forward-reverse lever shaft 9 is rotatably supported by the vertical support member 8 via a ball receiving body 8A. Forward and backward lever shaft 9
The entire length is supported by the handle post 7 and is integrated.

The forward / backward lever shaft 9 is fixed to the mounting member 47, and the tilt support shaft 6 is used as a tilt support shaft like the handle post 7. When the handle post 7 is tilted, the forward / backward drive lever shaft 9 is moved. Also tilts together. The longitudinal axis of the forward-reverse lever shaft 9 is substantially parallel to the axial center of the handle post 7, and the forward-reverse handle 52 is provided on the upper portion thereof.
Are connected so that they can swing up and down. The forward-reverse handle 52 is guided by a handle guide provided on the control section cover 44, is locked at a neutral position, and can be rocked back and forth in a state of being lifted (or pushed down) and released from the locking part. By swinging back and forth, the forward / reverse lever shaft 9 can be rotated to switch the forward / backward switching device 3 to the forward side or the reverse side.

The forward-reverse control valve 11 for controlling the forward-reverse switching device 3 and the forward-reverse lever shaft 9 are interlocked with each other via interlocking means 10. The interlocking means 10 includes an arm 14 protruding from a middle portion of the forward / backward lever shaft 9 and the arm 1
4 and a rocking body 15 connected via a rod 55 whose length is adjustable, and a cable 16 for flexibly connecting the rocking body 15 and the forward / backward control valve 11. Rocker 1
Reference numeral 5 denotes a tubular body 15A in which two arms 15B and 15C are welded and is pivotally supported by a bracket 15D fixed to a mounting member 47 via a shaft 15E. A rod 55 is connected to the arm 15B and a cable is connected to the arm 15C. 16 inner cables 16A are connected to each other. The outer cable 16B of the cable 16 is attached to a bracket 56 fixed to the attachment member 47. The bracket 15
D may be fixed to the handle post 7.

In FIGS. 1, 2 and 10, the forward-reverse control valve 11 is provided together with the shift control valve 18 on a mount 57 fixed to the traveling machine body 4. Vertical shafts 25 and 26 are erected parallel to each other on the mounting base 57, and a first relay 22 and a second relay 24 are swingably supported by the support shafts 25 and 26, respectively. The first relay 22 and the second relay 24 each have a shape in which two arms are projected from the boss portion, and one arm of the first relay 22 has a spool 11A of the forward-reverse control valve 11 and a pin 21. And the other arm is connected to the inner cable 16A of the interlocking means 10.

One arm of the second relay 24 is connected to the spool 18A of the shift control valve 18 via a pin 23,
The other arm is connected to the gear shift operation means 20 via a cable 19. The gear shift operating means 20 is a main gear shift operating lever, a sub gear shift operating lever, a super deceleration operating lever, or the like,
The inner cables of the cable 19 are pushed and pulled by being rocked, which are arranged on the left and right sides of the driver's seat 38.
The arms of the relays 22 and 24 and the spools 11A,
Connection with 18A (preferably via a link)
Is performed with headed pins 21 and 23. In the prior art, this pin is inserted from the bottom with the head down, and a beta pin or the like is attached to the upper end to prevent the pin from coming off.
The installation space for the forward-reverse control valve 11 and the shift control valve 18 is very small, and it is very difficult to put in the hands, which makes it very difficult to attach and detach the beta pin.

Therefore, with the heads of the pins 21 and 23 facing up,
Arms of relays 22 and 24 and spools 11A and 18A
It is inserted from above and the retaining body 27 is arranged on the heads of the pins 21 and 23 to prevent retaining, and the beta pin is unnecessary. The retaining body 27 is a support shaft 25,
It is fitted to both (or one) of 26 and is prevented from coming off by a snap ring, so that both relay bodies 22 and 24 are prevented from coming off and pins 21 and 23 are prevented from coming off. Since the pin 21 is located between the support shafts 25 and 26, the retaining body 2
It can be prevented from coming off in the middle part of 7, but the pin 23 is the support shaft 2.
Since it is located on the outer side of 5, 26, the outer peripheral portion of the retaining body 27 is protruded to the above to prevent retaining.

As a result, the manually operated forward-reverse control valve 1
1 and each spool 11A, 18A of the shift control valve 18,
The interlocking connection between the interlocking means 10 and the gear shift operating means 20 for operating the relays 22 and 24 can be easily and surely ensured. Further, the interlocking means 10 and the gear shift operation means 20 use cables such as push-pull cables and Bowden wires, and the cabin 35 is attached to the traveling machine body 4.
Even if oscillates, it does not hinder the control valve operation. The present invention is not limited to the above-mentioned embodiment, but can be modified in various ways. For example, the tractor 30 may not be equipped with the cabin 36, in which case the support base 5
Are directly attached to the traveling body 4. The forward / backward lever shaft 9 may be supported by a bush or the like so as to rotate only without providing the support member 8 with the ball receiving body 8A. Forward-reverse control valve 1
1 and the shift control valve 18 may be arranged at a place other than the front of the hydraulic system.

[0023]

According to the present invention described in detail above, when the handle post 7 is tilted, the forward / backward lever shaft 9 also tilts integrally with the handle post 7, and the forward / backward lever is moved relative to the handle post 7. The shaft 9 does not tilt and the height does not change, and the forward / reverse switching device 3 can be accurately switched between the forward drive side and the reverse drive side in the tilted posture.

[Brief description of drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention.

FIG. 2 is a side view of the rear part of the tractor.

FIG. 3 is a side view of the control device.

FIG. 4 is a front view of a control device.

FIG. 5 is a partial cross-sectional front view of the main part of the control device.

6 is a cross-sectional view taken along line XX of FIG.

FIG. 7 is a side view of the interlocking device.

FIG. 8 is a view on arrow Y of FIG.

FIG. 9 is a sectional view taken along line ZZ of FIG.

FIG. 10 is a plan view showing a relay body and a retaining body.

[Explanation of symbols]

1 Control device 2 transmission 3 Forward / reverse switching device 4 traveling aircraft 5 support 6 Tilt support shaft 7 handle post 8 Support members 9 Forward / backward lever shaft 10 interlocking means 11 Forward / backward control valve 14 arms 15 Oscillator 16 cables 17 Transmission 18 Shift control valve 19 cable 20 Gear change operation means 21 pin 22 First relay 23 pin 24 Second relay 25 spindles 26 spindle 27 retaining body 52 Forward / backward handle

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideo Fujita             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory F-term (reference) 3D040 AA01 AA03 AA22 AB04 AB08                       AC16 AC24 AC29 AC30 AD15

Claims (4)

[Claims] 1. A support base is provided on a traveling machine body having a forward / reverse switching device for a transmission, and a handle post is supported on the support base via a tilt support shaft, and the handle post is moved forward / backward via a support member. The lever shaft is rotatably supported so that it can be tilted integrally with the handle post, and the forward-reverse lever shaft and the forward-reverse switching device are interlocked so that the forward-reverse switching device can be switched forward and backward by rotating the forward-reverse lever shaft. A control device for a traveling vehicle, characterized in that they are interlocked by means. 2. The forward / reverse switching device is a hydraulic switching type and has a forward / backward control valve for switching it, and the interlocking means is connected to the arm provided on the forward / backward lever shaft and the arm. The operating device for a traveling vehicle according to claim 1, further comprising: an oscillating body that is pivotally supported with respect to the handle post, and a cable that connects the oscillating body and the forward-reverse control valve. 3. The operating device for a traveling vehicle according to claim 1, wherein the support member has a pair of upper and lower parts, and supports the forward / backward lever shaft through a ball receiving body. 4. The traveling machine body is provided with a hydraulic pressure change-type transmission, and has a shift control valve for switching the transmission and a shift operation means for operating the shift control valve via a cable. A forward / reverse control valve and a speed change control valve are provided on the upper side, and a rocking body that is pin-connected to the forward / reverse control valve spool and is swung by the interlocking means and the speed change operation means is connected to the spool of the speed change control valve by a pin. And a swinging body which is swung by the speed change operation means via a support shaft, and at least one of the support shafts is provided with a retainer body for preventing both the swingers and the pins from coming off. The control device for a traveling vehicle according to claim 2, wherein