JP2827340B2 - Work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a work vehicle such as a combine, and more specifically, a work vehicle includes a mechanism for controlling driving rolling of a vehicle body and a mechanism for controlling elevation of a vehicle height. The present invention relates to an operation device for a working vehicle.

(Prior art)

Conventionally, rolling control and vehicle height raising / lowering control of a vehicle body are manually operated by operation levers provided separately.

[Problems to be solved by the invention]

According to such a configuration, there is a problem that an erroneous operation due to an incorrect selection of the operation lever or the like is easily caused.

The present invention has been made to solve such a problem, and has taken the following technical measures.

[Means for solving the problem]

That is, in a working vehicle provided with a rolling mechanism that controls the inclination of the vehicle body in the left-right direction and a mechanism that controls the elevation of the vehicle height, one operation lever that can be operated at least in the left-right direction and the up-down direction from the neutral position is provided The rolling mechanism is driven by operating the operation lever in the left and right directions, and the vehicle height is controlled to be driven up and down by operating in the up and down directions.

[Effects of the Invention] Therefore, according to the present invention, rolling control can be performed by operating the operation lever in the left-right direction, and vehicle height elevation control can be performed by pushing and pulling the operation lever in the vertical direction. It is not necessary to change each operation, and since the movement of the operation lever and the movement of the vehicle body are in the same direction, each operation is easy to understand, no erroneous operation is caused, and the operation can be speeded up.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
A harvester 3, a threshing unit 4, a Glen tank 5, an operation unit 6, and the like are installed on a body frame 2 provided with a pair of right and left crawler traveling devices 1.1 to constitute a combine.

Since the left and right crawler devices 1 have the same structure, only the one crawler traveling device 1 will be described. A crawler driving wheel 9 that is wound around and driven by a crawler belt 8 is attached and fixed to a body frame 7 that is connected and fixed to the body frame 2 via a support body. The body frame 7 has a plurality of grounded wheels.
10. A movable track frame 12 which supports a crawler tensioning wheel body 11 capable of adjusting the tension of a crawler belt is mounted via a rolling link mechanism 13 so as to be relatively vertically movable. A large-diameter guide wheel 14 is supported by the movable track frame 12 at an intermediate position between the ground wheel groups 10.

The rolling link mechanism 13 includes a pair of front and rear rolling links 13a and 13b and rolling arms 15 and 15 pivotally supported by the vehicle body frame 7 so as to swing integrally therewith. arm
The free ends 15 and 15 are connected to each other by a rod 16 and a piston rod 18a of a rolling hydraulic cylinder 18 attached to a bracket 17 on the body frame 7 is connected to the rolling arm 15 on the rear side. The movable track frame 12 can be moved up and down with respect to the vehicle body frame 7 by the expansion and contraction operation of a rolling hydraulic cylinder 18 as a mechanism.

A pitching link mechanism 19 for controlling the inclination of the body in the front-rear direction is provided on the vehicle body frame 7 side. A pitching link 21 that is rotatable around a pitching arm shaft 20 at the rear, and a tip of the pitching link 21 A link 22a rotatably mounted on a pin shaft 22 with respect to a pitching arm that rotates integrally with the pitching link 21
This arm 23 is connected to a piston lot 24a of a pitching hydraulic cylinder 24 attached to the body frame 7, and the link 22a is moved around a link pin 26 of the pitching frame 25 by the expansion and contraction operation of the pitching hydraulic cylinder 24. By pivoting, the link 22a and the pitching link 21 move the body frame 7 to a pitching axis.
It is configured to rotate up and down around 27.

Next, a control mechanism of the crawler traveling device will be described. A hydraulic pump P that hydraulically operates a rolling hydraulic cylinder 18, a pitching hydraulic cylinder 24, and a cutting vertical cylinder 28 that moves the cutting unit 3 up and down with respect to the body frame 2.
Is provided as shown in FIG. The hydraulic circuit of the cutting vertical cylinder 28 includes a cutting control valve 29 for raising the cutting,
Also, a cutting control valve 30 for cutting and lowering is provided so as to operate electromagnetically. The hydraulic circuit of the pitching hydraulic cylinder 24 includes a pitching control valve that switches the body frame 7 around the pitching axis 27 to perform a pitching rotation forward and downward, and vice versa. 31 is provided. A rolling control valve 32 is provided in each of the hydraulic circuits of the pair of left and right rolling hydraulic cylinders 18 so as to switch the left or right movable track frame 12 independently or simultaneously so as to move up and down. 33 is an unload valve.

In FIG. 4, a controller 34 having a microcomputer has a manual tilt lever switch 35 on the input side.
The lever switch 35 and the manual operation lever 36 are provided near the driving unit 6, and the front lower switch FDS and the rear lower switch BDS are turned on by tilting the manual operation lever 36 in the front-rear direction.
In addition, the lower left switch LDS and the lower right switch RDS are turned on by the tilting operation in the left and right directions, and the pitching control valve 31 and the rolling control valve 32 are switched and output to perform the pitching operation of the vehicle body frame 7 or the left or right side. The movable track arm 12 is configured to perform a rolling operation by moving up and down.

Further, the operation lever 36 is configured to be vertically push-pullable via a sliding rod 46 slidable with respect to the machine frame 45,
The metal 47 is provided with a ball 49 pressed by a spring 48 which constantly presses the outer peripheral surface of the sliding rod 46. On the other hand, when the operating lever 36 is at the neutral position in the vertical direction, A fitting groove 50 into which the ball 49 is fitted to maintain the position.
Is provided.

A vehicle height up / down switch 37 is provided in the sliding range above and below the neutral position of the sliding rod 46. When the operation lever 36 is pulled upward from the neutral position, the vehicle height up / down switch 37 When the height raising switch 37a is operated, the left and right rolling control valves 32 are switched to the raising side, the vehicle height is raised, and when the vehicle is pushed downward, the vehicle height lowering switch 37b is operated.
Is operated, the left and right rolling control valves 32 are switched to the lower side, and control output is performed so as to lower the vehicle height.

The vehicle body horizontal switch 38 controls the left and right rolling of the vehicle body 1 and the front and rear pitching control.
The cereal stalk sensor 39 detects that the cereal stalk is in a state of being harvested by the reaping device, and thereby performs the above-described respective controls, such as the front-back tilt sensor 40, the left-right tilt sensor 41, and each of these stroke sensors. 42, 43 and 44 are provided.

For pitching control of the fuselage 2,
When 40 detects the inclination of the fuselage 2 in the front-rear direction, it switches the pitching control valve 31 forward or backward to extend and retract the pitching hydraulic cylinder 24, and the longitudinal stroke sensor 42 provided on the pitching hydraulic cylinder 24 The detection and feedback control are performed to control and maintain the body 2 in the front-rear horizontal state.

The rolling control of the vehicle body 1 is performed by detecting the left and right inclinations of the body or the vehicle body by the left and right inclination sensor 41.
Switching the left rolling control valve 32 or the right rolling control valve 32 to expand and contract the left and right rolling hydraulic cylinders 18 and perform feedback control while detecting the amount of expansion and contraction of each of the rolling hydraulic cylinders 18 by the left and right stroke sensors 43 and 44. Thus, the vehicle is controlled and maintained in a horizontal state.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a schematic side view of a combine, FIG. 2 is a side view of a crawler traveling device, FIG. 3 is a hydraulic circuit diagram, and FIG. 4 is a control block diagram. FIG. 5 is a schematic side view of the operation lever device in which a part of the operation lever device is broken, and FIG. 6 is a perspective view thereof. DESCRIPTION OF SYMBOLS 1 ... Crawler traveling device 2 ... Body frame 3 ... Cutting unit 4 ... Threshing unit 5 ... Glen tank, 6 ... Operating unit 7 ... Body frame, 8 ... Crawler belt 9 ... ... Crawler driving wheel 10 ... Grounding wheel 11 ... Crawler tensioning wheel 12 ... Movable track frame 13 ... Rolling link mechanism 14 ... Large-diameter guide wheel, 15 ... Rolling arm 16 ... Rod , 17 Bracket 18 Rolling hydraulic cylinder 19 Pitching link mechanism 20 Pitching arm shaft 21 Pitching link 22 Pin shaft 22a Link 23 Pitching arm 24 Pitching hydraulic cylinder 25 Pitching frame 26 Link pin 27 Pitching shaft 28 Cutting vertical cylinder 29 Cutting upper control valve 30 Cutting lower control valve 31 Pitching control valve 32 Lorry Control valve 33 …… Unload valve 34 …… Controller 35 …… Manual tilt lever switch 36 …… Operation lever 37 …… Vehicle height up / down switch 38 …… Vehicle horizontal switch 39 …… Grain culm sensor, 40… Sensor 41: Left-right tilt sensor 42-44: Stroke sensor

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takeshi Hagiyama 1st Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Shogo Oshima, Examiner, Corporate Technology Department (56) References JP-A-1-182180 (JP, A) JP-A-3-61421 (JP, A) JP-A 63-129429 (JP, U) JP-A 62- 99940 (JP, U) Japanese Utility Model Sho 63-202582 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B62D 55/116 A01D 67/00

Claims (1)

(57) [Claims] A work lever provided with a rolling mechanism for controlling the inclination of the vehicle body in the left-right direction and a mechanism for controlling the elevation of the vehicle height, a single operation lever operable at least in a left-right direction and a vertical direction from a neutral position. A work vehicle configured to drive the rolling mechanism by operating the operation lever in the left-right direction, and to control the vehicle height to be driven up and down by operation in the up-down direction.