JPH08119138A - Control device for running vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] In an operating device for operating a pair of left and right steering operation levers that rotate forward and backward, with one hand, when this operation is held at an appropriate front and rear position, the operation is performed. The purpose is to reduce tiredness of the hand. [Structure] An appropriate traveling device 2a, which is separated right and left by a predetermined distance,
2b is mounted on the vehicle body 1, and the left and right traveling devices 2a, 2b
The drive system that transmits power to the vehicle is equipped with an appropriate drive change mechanism for intermittently driving the left side or the right side, changing the drive speed, or braking the drive system. Pair of operation levers 20a, 20 approaching
In the configuration in which the traveling direction of the traveling vehicle is operated by moving the left and right operation levers 20a and 20b specially forward and backward, the pair of left and right operation levers 20 are connected.
A hand-holding body 26 for receiving the operator's grasping hand at a position lower than the upper end grasping position is provided between the left and right operation levers so that the a and 20b are close to each other and can be operated back and forth simultaneously. And a steering operation device for a traveling vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering operation device for a traveling vehicle. In general, the present invention relates to a device having a pair of left and right steering operation levers that control a tracked vehicle.

[0002]

2. Description of the Related Art Recently, tractors for agriculture have been diversified, and those equipped with endless track tracks on the left and right have come into circulation.
The hydraulic drive is mainly used in these devices, and the left and right drives of the traveling drive system are specially changed in speed to change the direction or turn. The same is true for agricultural combine harvesters. However, in such a vehicle, it has been a well-known technique to carry out the operation by shifting or stopping or braking the drive system with a pair of left and right steering operation levers. As an example of this technique, Japanese Utility Model Laid-Open No. 53-1193111 or Japanese Utility Model Laid-Open No. 52-1 is used.
It is apparent from the one disclosed in Japanese Patent No. 16510.

[0003]

In the above-mentioned prior art, there is nothing interposed between the left and right steering operation levers, and the left and right levers are grasped and held by one hand, If you want to continue driving in a straight, unshifted state,
There was a drawback that the hand that gripped was tired.

[0004]

The present invention takes the following technical means in order to solve the above-mentioned problems. That is, the traveling devices 2a and 2b are separated from each other by a predetermined distance on the left and right sides, and the appropriate traveling devices 2a and 2b are attached to the vehicle body 1.
In the drive system for transmitting power to the left and right traveling devices 2a and 2b, an appropriate drive changing mechanism for intermittently driving the left side or the right side, changing the drive speed, or braking the drive system is mounted. This drive changing mechanism is connected to a pair of operation levers 20a, 20b provided on the cockpit side and approaching left and right,
In the configuration in which the traveling direction of the traveling vehicle is operated by moving the left and right operation levers 20a and 20b specially forward and backward, the left and right operation levers 20a and 20b can be simultaneously operated back and forth by grasping with one hand. A hand holding body 26 for receiving the operator's gripping hand is provided at a position lower than the upper end gripping position between the left and right operation levers without the close arrangement.
And a steering operation device for a traveling vehicle.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a traveling vehicle in a crawler track type traveling mode, and 1 is a vehicle body. On the left and right sides of the vehicle body 1, endless track traveling devices 2a and 2b are installed. Reference numeral 3 is a crawler belt wound between the drive wheel 4 and the driven wheel 5. 6 is a rolling wheel. The hood 7 covers the front of the vehicle body 1.
The engine has been installed. A cabin 8 is composed of a control seat and its space. A hitch portion 9 connects the working machine, and is provided with a top link arm 10 operated by a hydraulic device. 11 indicates the PTO axis. Reference numerals 12a and 12b denote fuel tanks. The left and right endless track devices 2a and 2b are driven by a mission case.
It is configured to be operated by drive shafts 14a and 14b which project to the left and right sides of the space 13, respectively.

The drive system for the left and right drive shafts 14a and 14b will now be described in detail. The output of the engine 15 is transmitted into the mission case 16, and the drive system of the traveling system is driven by the output shaft from this mission. The dual hydraulic pumps 17a and 17b are driven. Then, hydraulic oil is sent from the hydraulic pumps 17a and 17b to the left and right hydraulic motors 18a and 18b that drive the drive shafts 14a and 14b,
It is configured to be hydraulically driven. Then, the control levers 19a, 19b of the hydraulic pumps 17a, 17b, which constitute a hydraulic control mechanism for changing the drive output of the HST type hydraulic motors 18a, 18b and changing the swash plate for reverse rotation, are provided with the cabin 8 A pair of left and right maneuvering levers 20 provided inside
a and 20b are connected to each other via wires-21a and 21b.

The configuration of the control section in the cabin 8 is the third.
As shown in the figure, the pair of steering operation levers 20a and 20b are arranged in front of and behind the control seat 22, and a pair of steering operation levers 20a and 20b are arranged. I am doing it. 25 is a control lever 20
The rotation supporting shafts a and 20b rotate forward when the levers -21a and 21b are operated to move forward, and the larger the operation rotation amount, the higher the speed. Further, the front and rear intermediate positions are neutral zones, and the stopped state is maintained. Further, if the turning operation is performed to the rear side, the backward drive is performed, and the larger the operation turning amount is,
The levers 20a and 20b and the control levers 19a and 19b of the hydraulic pump are connected to each other so as to achieve high speed. Further, the grips (a) and (b) of the pair of left and right steering operation levers 20a and 20b are provided close to each other so that both hands can be grasped with one hand, and both levers 20a and 20b can be operated back and forth with one hand. Is configured as follows.

Reference numeral 26 is a hand holding member, which is used for the levers 20a, 2
The upper end is formed in an arc shape along the rotation loci of the grips (a) and (b) in the left and right middle part of 0b, and the lower end is attached to the machine frame. And this hand holding body 26
The arcuate surface (c) of the upper surface in the side view of the grip part (a),
It is configured to be lower than the upper end of (b). Further, the hand holding body 26 configured as described above is used for both operation levers 20.
When the grips (a) and (b) provided on the upper ends of the a and 20b are gripped with one hand for maneuvering, it is possible to expect a function that can be comfortably put in the hand holding body 26.

According to the configuration of the above example, if the pair of left and right steering operation levers 20a and 20b are simultaneously rotated forward with one hand, the vehicle will move forward, and if rotated backward, the vehicle will move backward. Further, when turning or changing the direction, it is sufficient to grasp the manipulating levers on both the left and right sides with both hands and to turn only the lever 20a or lever 20b on the turning side forward. Turn the lever on the turning side to the front,
The lever on the non-turning side may be rotated to the rear side.

The pair of steering operation levers 20a, 2
Since 0b is provided close to the left and right, when operating the lever with both hands on one side, the left and right hands may interfere with each other, which may deteriorate the maneuverability. In order to eliminate this, as shown in FIG. 5, the steering operation levers 20a and 20b are pivotally supported by a pin 27 so that they can be bent outward in opposite directions by a predetermined dimension, and a spring 28 is normally used.
It is convenient if the configuration is such that the two come close to each other and return.

As described above, a pair of maneuvering levers-2 are provided.
0a and 20b are close to each other, and it has a convenient structure in which one hand can freely move forward or backward and change gears. However, in the case of this one-handed operation, a pair of left and right levers 20a and 20b can be used. Since he always grabs and steers, maneuvering fatigue occurs. In order to reduce this fatigue, in the embodiment of the present invention, the hand holding body 26 is positioned between the left and right steering operation levers, and placing the hand at the time of steering on this hand holding body greatly reduces fatigue. Can be reduced.

Another embodiment will be described below. In the embodiment shown in FIGS. 6 to 8, a pair of left and right steering operation levers 20a and 20b are formed into a side-reverse U-shape forming the handrail 26. A metal 27 movably fitted to the mold rod 26a is provided,
A lever fixing piece 28a that receives the lever is integrally provided on one side of the metal 27, and a movable piece that can switch between a state in which the lever on that side can be locked and a state in which the lever can be moved back and forth independently on the other side. 28b are provided. The movable piece 28b is fitted on the outer periphery of the metal 27 and is attached to a freely movable movable metal. And both pieces 28a, 2
The front side surface of the lever 8a is located in the same plane in the left-right direction so that the grips (a) and (b) of the levers 20a and 20b can be received.

According to this embodiment, the manipulating levers 20a and 20b on both the left and right sides can be obtained only by operating the metal 27 back and forth.
Can be operated easily. Further, a setting mechanism 2 capable of setting the metal 27 on the hand holding body 26 at an appropriate position during the operation.
By providing 9, the maneuvering speed can be maintained without being released. The set mechanism 29 is usually a set bolt, but other means such as a push-pull type pin can be used.

Another embodiment is shown in FIG. 9 and is explained. This is a pair of left and right steering operation levers 20.
The lock mechanism 30 is configured such that the levers a and 20b can be integrally formed at the grips (a) and (b).
In the embodiment, the electromagnetically actuated pin 31 is mounted on one grip,
The fitting hole 32 of the pin 31 is formed in the other grip portion. Then, the left and right levers are operated by operating the switch SW1.
Both levers can be locked together when the front and rear 20a and 20b are aligned. According to this embodiment, the left and right levers 20a and 20b are both
Can be set in an integrated manner by operating the switch, and it is possible to operate forward and backward by operating the lever on one side.

[0015]

According to the present invention, the pair of left and right steering operation levers can be gripped with one hand to perform forward and backward operations and gear shift operations, and the one hand operating the steering operation can be performed during this operation. It is possible to rest on the holding body for a comfortable operation.

[Brief description of drawings]

1] Side view

[Figure 2] Rear view

FIG. 3 is a side view of the main part.

[Fig. 4] Transmission mechanism diagram of main parts

FIG. 5 is a rear view of the main part of another example.

FIG. 6 is a rear view of the main part of another example.

7 is a schematic side view of FIG.

FIG. 8 is a perspective view of an essential part of FIG.

FIG. 9 is a rear view in which a part of another example is shown in section.

[Explanation of symbols]

 1 vehicle body 2a traveling device 2b traveling device 20a operation lever 20b operation lever 26 hand holding body

Claims (1)

[Claims] 1. A proper traveling device 2 which is left and right separated by a predetermined distance.
a and 2b are mounted on the vehicle body 1, and the left and right traveling devices 2a,
The drive system for transmitting power to 2b is equipped with an appropriate drive change mechanism for intermittently driving the left side or the right side, changing the drive speed, or braking the drive system. This drive change mechanism is provided on the cockpit side. A pair of operation levers 20a approaching left and right,
20b, and the left and right operation levers 20a and 20b are moved forward and backward to operate the traveling direction of the traveling vehicle.
20a and 20b are arranged close to each other so that they can be operated back and forth at the same time by holding one hand, and between the left and right operation levers,
A steering operation device for a traveling vehicle, characterized in that a hand holding body (26) for receiving a gripping hand of a driver is arranged at a position lower than the upper end gripping position.