JP2867544B2 - Travel chassis such as combine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a traveling chassis such as a combine, and has a pair of right and left crawlers for inclining the chassis to the left and right or to the front and back. It constitutes the vehicle body.

(Prior Art and Problems to be Solved by the Invention) On a crawler-shaped vehicle body, in the case of a combine, a chassis for mounting and supporting a threshing device, a mowing device, and a grain tank is provided. In a configuration in which rolling, which is a change in inclination of the chassis in the left-right direction, and pitching, which is a change in inclination in the front-rear direction, are performed, a rolling cylinder, a pitching cylinder, and the like, which are controlled to expand and contract the rolling and pitching by hydraulic pressure, are arranged. In addition, since the structure of the vehicle body is complicated, the mud is liable to be scattered during running and entangled with straw dust or the like, so that it is difficult to perform cleaning and inspection.

(Means for Solving the Problems) According to the present invention, the left and right crawlers KL and KR are vertically moved with respect to the vehicle body 1 on both left and right sides of the chassis 1, respectively.
Left and right rolling cylinder C for rolling
L and CR are provided, and the rolling cylinder CL and CR and the pitching shaft 3 are provided in order to provide a pitching cylinder 4 for controlling the front and rear inclination by rotating the chassis 2 on the upper side of the vehicle body 1 up and down around a pitching shaft 3 at the front of the vehicle body. From the rear and rear of the crawlers KL and KR.

(Action) When the height of the vehicle body 1 is increased under soft soil conditions, the left and right rolling cylinders CL and CR are operated by substantially the same amount, and the left and right crawlers KL and KR are moved relative to each other. When the vehicle body 1 is raised, both the left and right sides of the vehicle body 1 are raised, and the position of the center of gravity is raised.

When controlling the left-right inclination or the horizontal of the vehicle body 1, the left crawler KL or the right crawler KR of the vehicle body 1 is changed by expanding and contracting the left rolling cylinder CL or the right rolling cylinder CR to change the relative height between the left and right. Is controlled to be changed to a left tilt, a right tilt, a left-right horizontal posture, or the like.

The chassis 2 is tilted back and forth by the expansion and contraction of a pitching cylinder 4 at the rear end of the vehicle body 1, and is rotated around the pitching axis 3 at the front portion with respect to the vehicle body 1, so that the vehicle body 1 is substantially parallel to the vehicle body 1. From the front to the range of the lower front or horizontal control.

(Effects of the Invention) As described above, between the pair of left and right crawlers KL and KR and the vehicle body 1, the vehicle body 1 can be maintained in the left and right horizontal posture by the expansion and contraction control of the rolling cylinders CL and CR, or the left or right side. While the body 1
The pitching cylinders 4 that control the pitching of the chassis 2 back and forth are provided at the rear ends of the crawlers KL and KR, so that each rolling cylinder provided between the left and right crawlers KL and KR where the vehicle body 1 is located Since the pitching cylinders 4 and the left and right rolling cylinders CL and CR can be easily cleaned, maintained, inspected, etc. because the pitching cylinders 4 and CL are separated from each other. 4 is located at the rear end of the vehicle body 1 and the crawlers KL and KR, while the pitching shaft 3 is located at the front end, so that the longitudinal distance between them is set longer.
The required power of the pitching cylinder 4 can be reduced.

(Example) In the example of the figure, the crawlers KL and KR of the combine are used.
Along the crawler frame 5 in the front-rear direction,
Rollers 7, 8, 9 and the like are rotatably arranged on the drive shaft 10 protruding from the transmission case at the front end of the vehicle body 1 to both left and right sides, and the respective wheels 7, 8, 9 and the like. The belt is wound around an endless belt band 11 made of a rubber material as a main body and driven for transmission. The roller 9 at the rear end is configured to be movable back and forth with respect to the crawler frame 5.

The front and rear sides of the crawler frame 5 are, on the left and right sides of the front and rear of the vehicle body 1, arm arms at the tip of a crawler arm 14 supported by a pitching shaft 3 and a shaft 13 by brackets 12.
The crawler arm 14 is pivotally supported around the pitching shaft 3 and the shaft 13 of the vehicle body 1 by the front and rear rotation of an arm 16 integrated with the inner ends of the pitching shaft 3 and the shaft 13. 5 can be moved up and down. If the front and rear crawler arms 14 have the same length, the crawler frame 5 can be moved up and down in parallel with the vehicle body 1. For this reason, the front and rear arms
The right and left rolling cylinders CL and CR, which are connected to each other by a rod 17, are provided between the vehicle body 1 and a rear arm 16, and are expanded and contracted by hydraulic pressure.

On the upper side of the vehicle body 1, the chassis 2 has a front end pivotally supported by the support arm 18 around the left and right pitching shafts 3, and a rear portion pivotally connected to a link 19 which is moved up and down with respect to the vehicle body 1. Support 20. Crawler K at the rear end of chassis 2
A pitching cylinder 4 which is extended and retracted by hydraulic operation is provided as much as possible behind the rear ends of L and KR, and an upper end of a pitching arm 22 which is rotated around an arm axis 21 with respect to the vehicle body 1 is provided with this pitching cylinder. The lower end of the pitching arm 22 is connected to the link 19 by a pivot 23, and the rear end of the chassis 2 is rotated around the pitching shaft 3 via the link 19 by the extension of the pitching cylinder 4 by being connected to the piston of the cylinder 4. It is configured to rotate and ascend and descend by shortening. The inclination of the chassis 2 in the front-rear direction is performed with respect to the vehicle body 1, and the left and right crawlers KL and KR with respect to the vehicle body 1 are provided.
Regardless of the rolling posture.

A grain tank that holds a threshing device 24 on the left side on the upper side of the chassis 2 and the threshing device 24 on the right side of the chassis 2
25 are provided. The pitching cylinder 4 protrudes upward from the undercarriage 2, but is configured to be located at an interval 26 between the threshing device 24 and the grain tank 25.

Hydraulic circuit 27 by hydraulic pump P includes rolling control valves 28, 29 for operating left and right rolling cylinders CL, CR,
And a pitching control valve for operating a pitching cylinder 4
30 and so on are provided so as to be switched in conjunction with a solenoid by a switch or the like. 31 is an unload valve. A controller 32 for controlling each of these control valves 28, 29, 30, etc. is equipped with a microcomputer, and on the input side, an overall up / down switch 33,
Tilt lever switch 34, threshing switch 35, vehicle body horizontal switch 36, left and right tilt switch 37, front and rear tilt switch 38,
Left stroke sensor 39 for detecting the amount of expansion and contraction of left rolling cylinder CL, right stroke sensor 40 for detecting the amount of expansion and contraction of right rolling cylinder CR, and pitching cylinder 4
A front-rear stroke sensor 41 for detecting the amount of expansion and contraction of the
On the output side, there are provided solenoids 42, 43, 44, 45, etc., which perform switching operations of the control valves 28, 29, 30, 31, etc. 46 is an automatic lamp that lights up during automatic control.

When the entire vehicle body 1 is moved up and down in parallel, by operating the overall up / down switch 33, the left and right rolling control valves 28 and 29 are switched in the same direction to extend the left and right rolling cylinders CL and CR. By contraction, the stroke sensor 39,
The vehicle body 1 is raised and lowered in parallel by the detection of 40. At this time, the chassis 2 is also moved up and down integrally.

The tilt lever switch 34 is configured to roll or pitch the vehicle body 1 toward the tilted side by tilting the control lever left or right or forward or backward, and each of the control valves 28, It is performed by switching 29, 30, etc.

The vehicle body horizontal switch 36 controls the vehicle body horizontally left and right regardless of the inclination of the running ground.
29 and control of the stroke sensors 39, 40, etc.

In the case of the automatic control, the vehicle body 1 is constantly maintained in the horizontal state by the rolling control by the inclination sensors 37, 38 and the stroke sensors 39, 40, 41, etc. in the horizontal control. The vehicle body 1 is maintained in a posture such as a left-right inclination or a chassis 2 front-back inclination, and the height of the vehicle body 1 is maintained in the vehicle height control. Such various controls are automatically performed by selecting a control mode.

[Brief description of the drawings]

1 and 2 are side views showing an operation state, FIG. 3 is a rear view showing a partial cross section, FIG. 4 is a control block diagram, and FIG. The figure is a hydraulic circuit diagram. DESCRIPTION OF SYMBOLS 1 ... body, 2 ... chassis 3 ... pitching shaft, 4 ... pitching cylinder

Claims (1)

(57) [Claims] 1. Left and right rolling cylinders CL, C for rolling crawlers KL, KR up and down independently of the vehicle body 1 on the left and right sides thereof.
In order to provide a pitching cylinder 4 for controlling the front and rear inclination by rotating the chassis 2 on the upper side of the vehicle body 1 around a pitching shaft 3 at the front of the vehicle body, the rolling cylinders CL and CR are separated from the pitching shaft 3. A traveling platform such as a combine provided in the direction from the rear to the rear of the crawlers KL and KR.