JPH10276549A - Traveling equipment for work vehicles - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a wetland field, when a work vehicle starts reversing, a driving reaction force of a traveling device causes a front side, and in a combine which is an agricultural machine, a mowing device side is lowered and a lower portion is a field scene. When the vehicle is moving backward, the vehicle is caused to perform a forward-upward inclination. At this time, it is prevented that the forward inclination is increased more than necessary. SOLUTION: Detection of a soft state by a soft / hard judging means 5;
In connection with the detection of the reverse traveling state of the reverse traveling state detecting means 4, the chassis 2 is tilted forward and forward by the front and rear tilting means 3, and the angle of the forward tilting is maintained at an arbitrary angle. The configuration of the traveling device of the working vehicle is as follows.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In a conventional traveling apparatus for a working vehicle, when the soft / hard determining means detects the soft state of the running surface and the reverse state detecting means detects the backward movement of the working vehicle, the chassis is tilted by the forward / backward tilting means. The configuration was such that the front was inclined upward. At this time, when the chassis is tilted forward, the configuration is such that the forward tilt is maximized.

[0003]

In the traveling apparatus for a work vehicle as described above, when the soft / hard determining means detects the soft state on the upper surface of the traveling road, the soft state may not be so high. However, in such a case, if the chassis is tilted forward to the maximum by the front-rear inclining means, a problem occurs in which the vehicle passes the horizontal state and the chassis is raised forward.

[0004] It is an object of the present invention to provide a traveling device for a working vehicle which prevents the above-mentioned problems.

[0005]

The above object of the present invention is achieved by the following constitution. That is, in the traveling device for a working vehicle having the configuration described in the claims, the front / rear tilting means 3 is related to the detection of the soft state of the soft / hard determining means 5 and the detection of the reverse state of the reverse state detecting means 4. The traveling device for a working vehicle is characterized in that the chassis 2 is tilted forward and tilted, and the tilting angle is held at an arbitrary angle.

[0006]

Embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a traveling device of a working vehicle embodying the present invention. In the present embodiment, a description will be given of a combine, which is an agricultural machine, that cuts a culm planted in a field and performs threshing and sorting.

In front of the undercarriage 2 having the traveling device 1, a cutting device 6 for cutting the planted grain culm and transporting it to the rear, and a feed chain further rearward inheriting the grain culm transported from the cutting device 6 are provided. A supply / transport device 8 for transporting the paper 7 is provided. A threshing device 9 on the undercarriage 2 for threshing and sorting while transferring and conveying the grain stems conveyed from the supply and conveying device 8 by the feed chain 7, and a Glen tank for temporarily storing the grains that are threshing and sorted by the threshing device 9. 10 and an operation unit 11 are mounted.

The chassis 2 is provided with a forward / backward tilting means 3 for tilting the chassis 2 in the front-back direction. The traveling device 1 will be described. The traveling device 1 includes an endless belt-shaped crawler 1.
2 and a driving sprocket 1 for rotating the crawler 12
3, a plurality of ground wheels 14 provided at predetermined intervals to ground the crawler 12 on the ground, a movable wheel 15 corresponding to unevenness of the ground, and the ground wheels 14 and the movable wheels 15 It comprises a track roller frame 16 to be supported, a moving sprocket 17 for applying tension to the crawler 12, an adjusting device 18 for adjusting the movement of the moving sprocket 17, a supporting wheel 19 for preventing the crawler 12 from hanging down, and the like. The same configuration is provided in a pair on the left and right.

Next, the front-rear inclining means 3 for inclining the front-back direction of the chassis 2 will be described. One end of the connecting arm 20 is connected to a pitching arm 21 by a pin 22, and the pitching arm 21 is loosely connected to the chassis 2 by a shaft 23. Specifically, the shaft 23 is rotatably supported by a running frame 24 by a bearing 25. Pitching arm 21 on the right side in the forward direction of the combine
Only the protrusion protrudes upward (projection 21a), and the end of the piston rod 27 of the pitching hydraulic cylinder 26 that is loosely fitted to the chassis 2 is loosely fitted.

When the piston rod 27 is extended, the pitching arm 21 rotates clockwise about the shaft 23 as a fulcrum. Since the pin 22 also rotates clockwise together with the pitching arm 21, the connecting arm 20, the rear shaft 28, the rear arm 29, and the pin 30 move up. Since the pin 30 raises the rear part of the track roller frame 16, the distance between the rear part of the chassis 2 and the crawler 12 is shortened, and the chassis 2 (the entire combine) is inclined forward and downward. . FIG. 4 shows a view of this front ascending.

When the piston rod 27 is shortened, the above-described movement is reversed, the distance between the rear portion of the chassis 2 and the crawler 12 increases, and the chassis 2 (the entire combine) has a forward slope. Such a pitching movement is basically for making the inclination of the combine in the front-back direction substantially horizontal. When the field scene is a wetland,
The combine is also inclined in the front-rear direction to prevent this. The specific movement is the inclination sensor 31
Detects the movement of the chassis 2 (entire combine) in the front-rear direction, and makes the vehicle horizontal. For example, when the chassis 2 is tilted forward together with the traveling device 1, the piston rod 27 of the pitching hydraulic cylinder 26 is extended, The undercarriage 2 (entire combine) is made horizontal as a forward rising slope.

When the undercarriage 2 is inclined rearward together with the traveling device 1, the piston rod 27 of the pitching hydraulic cylinder 26 is shortened, and the rear portion of the undercarriage 2 is moved upward with respect to the traveling device 1. 2 (the whole combine) is made horizontal. Next, the running surface soft / hard determining means 5 will be described. In the present embodiment, since the combine is an agricultural machine, it is mainly determined whether the traveling field scene is a dry field or a wet field. A specific configuration is called an on-off type wetland switch 5 installed in the operation unit 11. When the operator determines that the field state is wetland, the operator turns the wetland switch 5 on. Further, a configuration may be adopted in which whether or not a field is a wetland is automatically detected. For example, the inclination state of the aircraft may be detected by the inclination sensor 31 to determine the wetland condition, or the distance from the field scene may be measured by an ultrasonic sensor (not shown) to detect the sinking amount of the aircraft. To determine the wetland condition. In short, any means can be used as long as it can detect the wetland condition.

Next, FIG. 5 will be described. Control means 1
The input side of 00 is connected to the reverse state detecting means 4, the soft / hard determining means (wetland switch) 5 and the inclination sensor 31, and the output side thereof is connected to the electromagnetic valve of the pitching hydraulic cylinder 26. Configuration. When the work is started by running such a combine, the planted grain culm is cut off by the cutting device 6 and is conveyed backward. And threshing. The grains selected by threshing by the threshing device 9 are transported into a Glen tank 10 and temporarily stored therein.

When the combine starts moving backward in a wet field, the whole combine is inclined forward and downward by the driving reaction force of the traveling device 1. At this time, especially in the combine,
Since the mowing device 6 projects further forward than the undercarriage 2, there is a possibility that the lower portion of the mowing device 6 comes into contact with the field scene and is damaged. Therefore, the reverse state detecting means 4 detects the reverse state (in this embodiment, the position sensor 32a detects that the traveling speed change lever 32 has been operated to the reverse side) and the wetland switch 5 is in the on state. The control means 100 operates the above-mentioned front-rear inclining means 3 (the electromagnetic valve of the pitching hydraulic cylinder 26) to tilt the chassis 2 forward and upward.

At the time of the forward tilting, the piston rod 27 of the pitching hydraulic cylinder 26 is conventionally used.
Was moving all the strokes. For this reason, the vehicle 2 passes through the horizontal state, and the vehicle 2 is in a state of rising forward. In this case, the ride comfort of the operator in the combine deteriorates, and in particular, since the combine is equipped with the threshing device 9, if the threshing device 9 is inclined, the sorting of the kernels is deteriorated. Failure occurs.

When the inclination angle of the chassis 2 returns to a certain level (detected by the inclination sensor 31), the control means 10
0 is a configuration in which the operation of the electromagnetic valve of the pitching hydraulic cylinder 26 is stopped to stop the forward raising inclination. In the present embodiment, the horizontal or substantially horizontal state is set. As a result, even when the vehicle is traveling backward, the chassis 2 is in a substantially horizontal state, so that the ride comfort of the operator is improved, and it is possible to prevent a problem in sorting the grains in the threshing device 9.

Next, FIG. 6 will be described. As described above, the undercarriage 2 is automatically set to be substantially horizontal when the vehicle moves backward, but may be arbitrarily set by the operator. That is,
It may be set arbitrarily horizontal or substantially horizontal, may be set slightly downward from horizontal, or may be set slightly upward from horizontal. By providing the switch 33 in the operation unit 11 and turning the switch 33, the forward pitching amount can be adjusted when the vehicle moves backward. As a result, the chassis 2 is located at a position desired by the operator when the vehicle is traveling backwards, regardless of the wet field condition of the running surface. Therefore, the undercarriage 2 does not rise forward more than necessary as in the related art, so that the posture of the undercarriage 2 can be quickly corrected when returning to the forward movement state after the backward movement.

If the switch 33 is shared with the running surface soft / hard determining means (wetland switch) 5, the operability is further improved. When the wetland switch 5 is pressed, the soft / hardness determination function on the upper surface of the traveling road is activated, and when the switch is turned, the forward pitching amount during reverse travel can be set arbitrarily. The forward raising pitching amount at the time of reversing is a function necessary only when the running surface is in the wetland state, and thus the operability is improved by adopting the above-described configuration.

[0019]

As described above, the present invention relates to the detection of the soft state of the soft / hard judging means 5 and the detection of the reversing state of the reversing state detecting means 4 to raise the chassis 2 by the forward / backward tilting means 3. Since the tilting configuration is such that the angle of forward tilting is maintained at an arbitrary angle, the chassis 2 can be moved backward.
Can position the chassis 2 at a position desired by the operator.

[Brief description of the drawings]

FIG. 1 is a left side view of the combine.

FIG. 2 is a left side view.

FIG. 3 is a plan view

FIG. 4 is a left side view.

FIG. 5 is a block diagram.

FIG. 6 is a diagram showing the relationship between the amount of operation of a switch and the amount of forward pitching during reverse travel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Running apparatus, 2 ... chassis, 3 ... front-back inclination means, 4 ... reverse state detection means, 5 ... soft / hardness determination means (wetland switch),
6 harvester, 7 feed chain, 8 supply conveyor, 9 threshing device, 10 Glen tank, 11 operating unit, 12 crawler, 13 drive sprocket, 14
Ground roller, 15: movable roller, 16: track roller frame, 17: moving sprocket, 18: adjusting device, 19
... Support wheel, 20 ... Connection arm, 21 ... Pitching arm, 21a ... Protrusion, 22 ... Pin, 23 ... Shaft, 24 ... Running frame, 25 ... Bearing, 26 ... Pitching hydraulic cylinder, 27 ... Piston rod, 28 ... Rear shaft, 29: rear arm, 30: pin, 31: tilt sensor, 32: traveling speed change lever, 32a: position sensor, 33: switch, 100: control means.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Toshihiko Mizumoto No. 1 Yatsukura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A front / rear inclining means 3 for inclining a chassis 2 in a front / rear direction with respect to a traveling apparatus 1, a reverse traveling state detecting means 4 for detecting a backward traveling state, and selecting whether a traveling surface of the traveling apparatus 1 is soft or hard. In a traveling device of a work vehicle provided with a soft / hard determining means 5 to perform detection of a soft state of the soft / hard determining means 5,
In relation to the detection of the reversing state of the reversing state detecting means 4, the chassis 2 is tilted forward by the front-rear inclining means 3;
A traveling device for a working vehicle, wherein an angle at which the vehicle is tilted forward is maintained at an arbitrary angle.