JPH1137A - Running device in working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a working vehicle suppress front-up inclining for a state not so muddy ill-drained paddy field while performing the front-up inclination to a chassis in regressing to prevent a possibility of braking of a front side of a running device by a driving counteraction, or of a lower part of a reaper side in a combine harvester as agricultural machinery by lowering and bringing the lower part into contact with a field surface, when the working vehicle starts to regress in a muddy ill-drained paddy field. SOLUTION: This running device in a working vehicle has a construction of inclining a chassis 2 to a front-up attitude by a longitudinal inclining means in relating to a detection of a soft state by a softness and hardness judging means 5 and a detection of a regressing state by a regressing state detecting means, and when a state harder than a standard soft degree is detected by a the softness and hardness judging means 5 during the working vehicle runs to a constant distance, the front-up inclination of the chassis 2 by the longitudinal inclining means is prevented even the regressing state of the vehicle is detected by the regressing state detecting means.

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, regardless of the detection result of the soft / hardness determination means, the chassis is tilted forward and forward by the front-rear inclination means.

[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 apparatus for a work vehicle having the configuration described in the claims, the front / rear tilting means 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. In a configuration in which the undercarriage 2 is tilted forward by 3, when the softness of the soft / hard determining means 5 is detected to be harder than the reference softness while the work vehicle travels a fixed distance, the reverse state detecting means 4 This is a traveling device for a work vehicle configured to check the forward-inclined inclination of the chassis 2 by the front-rear inclining means 3 even when a reverse state is detected.

[0006]

Embodiments of the present invention will be described with reference to the drawings. 1 to 3 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 undercarriage 2 is provided with elevating means 12 for elevating and lowering the undercarriage 2 and fore-and-aft inclining means 3 for inclining in the fore-and-aft direction. The traveling device 1 will be described. Traveling device 1
Corresponds to an endless belt-shaped crawler 13, a driving sprocket 14 for rotating the crawler 13, a plurality of grounding wheels 15 provided at predetermined intervals to ground the crawler 13 on the ground, and corresponding to irregularities on the ground. A movable roller 16; a track roller frame 17 supporting the ground roller 15 and the movable roller 16; a moving sprocket 18 for applying tension to the crawler 13; an adjusting device 19 for adjusting the movement of the moving sprocket 18; 13 comprises a supporting wheel 20 and the like for preventing the sag 13 from drooping. The same configuration is provided in a pair on the left and right.

The elevating means 12 is provided in each of the left and right traveling devices 1 described above. The elevating means 12 will be described. A front arm 21 is loosely connected to a pin 22 at the front of the track roller frame 17, and a rear arm 23 is loosely connected to a pin 24 at the rear. Front arm 21
Is loosely connected to a front rolling shaft 26 of a support 25 fixed to the chassis 2, and an arm 27 is loosely connected to the front rolling shaft 26. The front arm 21 and the arm 27 are connected and fixed. The other end of the rear arm 23 is loosely connected to a rear rolling shaft 29 of a connecting arm 28 fixed to the chassis 2, and an arm 30 is loosely connected to the rear rolling shaft 29. . The rear arm 23 and the arm 30 are connected and fixed. The arm 27 and the arm 30 are loosely connected by a connecting rod 31.
0, the piston rod 33 of the hydraulic cylinder 32
Are loosely connected. The hydraulic cylinder 32 is loosely fitted on a plate 32 a loosely fitted to the chassis 2, and a plate 32 b is provided from the loosely fitted axis, and an end thereof is connected to the pitching arm 34.

The plate 32b includes a hydraulic cylinder 32
The piston rod 33 is made movable. The reason why the hydraulic cylinder 32 is suspended from the plate 32a is that the piston rod 33 of the hydraulic cylinder 32 does not move when the pitching hydraulic cylinder 35 is operated. Therefore,
When the piston rod 33 of the hydraulic cylinder 32 is extended, in the left side view of FIG. 2, the arm 30 rotates clockwise to pull the connecting rod 31, and the connecting rod 31 rotates the arm 27 clockwise. Then, rear arm 2
3 and the front arm 21 are both rotated clockwise, so that the track roller frame 17 is lowered with respect to the chassis 2. Therefore, when the piston rods 33 of the left and right hydraulic cylinders 32 are simultaneously extended, the chassis 2 is raised with respect to the ground.

When the piston rod 33 of the hydraulic cylinder 32 is contracted, the movement becomes opposite to the above-mentioned movement.
The track roller frame 17 is configured to rise upward with respect to the chassis 2. Therefore, when the piston rods 33 of the left and right hydraulic cylinders 32 are simultaneously shortened, the chassis 2 is lowered with respect to the ground. The hydraulic cylinder 32 is also used for correcting when the combine is tilted left and right (rolling). For example, if the traveling device 1 of the combine tilts to the left due to the influence of the field, the chassis 2 also tilts to the left, and the operation unit 11 mounted on the chassis 2 also tilts to the left. The riding comfort of the riding operator is worsened, and the threshing device 9 is also inclined to the left so that the sorting of the threshed grains is also worsened. In such a case, the piston rod 33 of the left hydraulic cylinder 32 is extended to raise the left side of the chassis 2 to make the chassis 2 substantially parallel (rolling control). The inclination state of the combine is detected by an inclination sensor 36 installed on the chassis 2. When the combine tilts to the right, the piston rod 33 of the right hydraulic cylinder 32 is extended to raise the right side of the chassis 2.

Next, a description will be given of the front-rear inclining means 3 for inclining the chassis 2 in the front-rear direction. One end of the connection arm 28 is connected to the pitching arm 34 by a pin 37, and the pitching arm 34 is loosely connected to the chassis 2 by a shaft 38. Specifically, the shaft 38 is rotatably supported on a traveling frame 39 by a bearing 40. The pitching arm 34 on the right side with respect to the forward direction of the combine
Only the protrusion protrudes upward (projection 34a), and the end of the piston rod 42 of the pitching hydraulic cylinder 35 loosely fitted to the chassis 2 is loosely fitted to the end thereof.

When the piston rod 42 is extended, the pitching arm 34 rotates clockwise about the shaft 38 as a fulcrum. Since the pin 37 also rotates clockwise with the pitching arm 34, the connecting arm 28, the rear rolling shaft 2
9, the rear arm 23 and the pin 24 are configured to rise.
Since the pin 24 raises the rear part of the track roller frame 17, the distance between the rear part of the chassis 2 and the crawler 13 is shortened, and the chassis 2 (the entire combine) is inclined forward and downward. Configuration.

When the piston rod 42 is shortened, the above-described movement is reversed, the distance between the rear portion of the chassis 2 and the crawler 13 is increased, and the rear chassis is inclined upward, that is, the chassis 2 (entire combine) is inclined forward and downward. It is. 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 also inclines in the front-rear direction as described above, and is intended to prevent this. Specifically, when the tilt sensor 36 detects the movement of the chassis 2 (entire combine) in the front-rear direction, the inclination is set to be horizontal.
For example, when the chassis 2 is inclined forward with the traveling device 1,
The piston rod 42 of the pitching hydraulic cylinder 35 is extended so that the undercarriage 2 (entire combine) is horizontal as the front is inclined upward.

When the chassis 2 is tilted rearward together with the traveling device 1, the piston rod 42 of the pitching hydraulic cylinder 35 is shortened to move the rear portion of the chassis 2 upward with respect to the traveling device 1, thereby 2 (the whole combine) is horizontal. Next, the soft / hardness determination means 5 on the upper surface of the traveling road 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. The specific configuration is called an on-off type wetland switch 5 installed on the operation unit 11,
When the operator determines that the field state is the wetland, the operator turns on the wetland switch 5 by himself. 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 body may be detected by the inclination sensor 36 to determine the wetland state, or the distance from the field scene may be measured by an ultrasonic sensor (not shown) to detect the sinking amount of the body. To determine the wetland condition. In short, any means can be used as long as it can detect the wetland condition.

When the operation is started by running such a combine, the planted cereal culm is cut off by the cutting device 6 and transported rearward. Thereafter, it is taken over by the starting end of the feed chain 7 and pinched and transported. Threshing is performed by the device 9. 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 while the field is in the wetland state, the entire combine becomes inclined forward and downward due to 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, the lower portion of the mowing device 6 may come into contact with the field scene and be damaged. Therefore,
The reverse state detecting means 4 detects the reverse state (in this embodiment,
The position sensor 43a detects that the traveling speed change lever 43 has been operated in the reverse direction), and when the wetland switch 5 is in the on state, the front-rear inclining means 3 (the pitching hydraulic cylinder 35) is operated, The chassis 2 is tilted forward.

However, during the operation of raising the front, the rear lower portion of the chassis 2 may come into contact with the crawler 13, so that the lifting / lowering means 12 (the left and right hydraulic cylinders 32) is operated to lower the chassis 2. Ascend to the scene against the field and set the chassis 2 and crawler 1
Keep the distance to 3 longer. Since the determination as to whether or not the contact is not made can be made based on the amount of expansion and contraction of the piston rod 33 of the hydraulic cylinder 32, the amount of movement of the piston rod 33 is detected by the position sensor 33a via the link mechanism 33b. .

Conventionally, when the combiner is in a reverse state with the wetland switch 5 turned on, as described above, when the combine is tilted forward and upward, as far as the rear lower part of the chassis 2 and the crawler 13 are in contact, the elevating means is used. Although the undercarriage 2 was raised at 12, the combine was executing reverse movement during the ascent time of the undercarriage 2, so that during the time, the combine was inclined forward and downward. there were.

When the wet state switch 5 is turned on and the forward movement of the combine is detected (in this embodiment, it is detected that the position sensor 43a of the traveling speed change lever 43 has been operated forward), the chassis 2 is raised by the lifting means 12. of course,
This rising amount is a range in which the lower rear portion of the chassis 2 does not come into contact with the crawler 13 even when the combine is tilted up to the maximum front.

As another embodiment of the reverse state detecting means 4 and the detection of the forward state, the rotation direction of an arbitrary shaft in the transmission 44 may be detected, or the drive sprocket 14, the ground wheel 15, the movable wheel The reverse direction or the forward state may be determined by detecting the rotation direction of the wheel 16, the supporting wheel 20, and the like. In short, any means can be used as long as it can detect whether the combine is in the reverse state or the forward state.

As described above, when the combine starts moving backward with the wetland switch 5 turned on, the combine is always raised forward by the front-rear inclining means 3, but there are some places in the wetland that are not so muddy. When the vehicle is traveling backward in such a place and performs a forward-inclined inclination, the combine passes through the horizontal state and is further brought into the forward-inclined state, and the riding comfort is deteriorated.

Therefore, when the soft / hard determining means 5 detects a state where the softness of the running surface does not exceed a certain value, that is, a dry field or a state close to a dry field, while the combine is traveling for a fixed distance, the reverse state detecting means Even if the vehicle 4 detects the reverse state, the forward and backward inclination of the chassis 2 by the front-rear inclination means 3 is prevented. Thereby, it is possible to prevent the combine from passing through the horizontal state and being further raised forward, so that the ride comfort of the operator is improved.

[0023]

As described above, according to the present invention, when the soft / hard determining means 5 detects a state in which the softness of the running surface does not exceed a certain value while the working vehicle travels a fixed distance, the reverse state detecting means 4 Does not raise the chassis 2 forward and backward by the front-rear inclining means 3 even if the vehicle detects a reverse state, so that the work vehicle can be prevented from passing through the horizontal state and being further raised forward, and the operator's Ride comfort is also improved.

[Brief description of the drawings]

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

FIG. 2 is a left side view of the traveling device.

FIG. 3 is a plan view of the traveling device.

[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).

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;
If the detected softness of the soft / hard determining means 5 detects a state that is harder than the reference softness while the work vehicle travels a fixed distance, the forward / rearward tilting means 3 will be provided even if the reverse state detecting means 4 detects the reverse state. A traveling device for a working vehicle configured to restrain the front-inclined inclination of the chassis 2 by the vehicle.