JPH04316426A - Steering lever of combine or the like - Google Patents

Abstract

PURPOSE:To rapidly and precisely control the attitude of body by equipping a steering lever for controlling a body with a slant switch for carrying out rolling and pitching of the body. CONSTITUTION:When a steering lever 2 is grasped and inclined left or right, a left or right steering clutch or steering brake is worked and traveling direction of a body can be controlled. Near a levee or under a condition cansing a ready drop of a traveling device e.g. on the surface of soft soil in a field or under a severe condition of left and right or longitudinal inclination of body, control of body by rolling and pitching to maintain horizontal attitude is required and in this occasion, a slant switch 3 of the steering lever 2 is operated, the body is rolled into a horizontal attitude in the left and right direction or made to pitch into a horizontal attitude in the longitudinal direction.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering lever for a combine harvester, etc., and allows the operator to change the tilted attitude of the vehicle body using the hand while holding the steering lever.

0002

[Prior Art and Problems to be Solved by the Invention] A rolling switch that changes the tilting posture of the vehicle body in the left-right direction or a tilting posture in the front-rear direction is used in response to a steering lever that operates the running direction of the vehicle body. The pitching switch and other controls were configured to be able to be operated independently on the control panel. In a work machine such as a combine harvester, which has many operating levers and operating switches, there are many erroneous operations, and quick and accurate operations are required, especially when correcting the tilted posture of the vehicle body.

0003

[Means for Solving the Problems] The present invention provides a structure of a steering lever for a combine harvester, etc., in which a steering lever 2 for steering a vehicle body 1 is provided with a tilt switch 3 for rolling or pitching the vehicle body 1. shall be.

0004

[Operation and Effects of the Invention] When the steering lever 2 is gripped and tilted to the left or right, the left and right steering clutches, steering brakes, etc. are operated, and the running direction of the vehicle body 1 can be controlled. Under conditions where the traveling device is likely to sink and the vehicle body 1 is tilted from side to side or front and back, such as on the edge of a ridge or on a soft soil surface in a field, it is necessary to control the vehicle body to a horizontal position by rolling or pitching. In such a case, by operating the tilt switch 3 of the steering lever 2, the vehicle body 1 is rolled into a horizontal position in the left-right direction, or pitched into a horizontal position in the front-rear direction.

[0005] In this way, the pilot controls the attitude of the aircraft by operating the tilt switch 3 of the steering lever 2 while holding the steering lever 2, such as rolling or pitching. It can be operated quickly and accurately with one hand.

[0006]

[Embodiment] Referring to FIGS. 1 to 7, to illustrate the case where this is applied to a combine harvester, a steering lever 2 is provided on a control platform 4, and when the steering lever 2 is tilted to the left from the neutral position, the steering lever 2 moves to the left. While disengaging the device 6 steering clutch,
Furthermore, when the angle of inclination to the left is increased, the steering brake of the left traveling device is activated. Also, steering lever 2
When tilting to the right, the steering clutch of the right traveling device 6 can be similarly disengaged and the steering brake can be activated. The steering clutch, steering brake, etc. can be operated by switching the switches 2L and 2 by tilting the steering lever 2 left and right.
By turning R on and off and switching the solenoid valve, the hydraulic push cylinders 8L and 8R are operated.

Furthermore, by tilting and rotating the steering lever 2 from the neutral position in the longitudinal direction, the reaping device 11 at the front of the vehicle body 1 can be lowered to a working position or raised to a non-reaping position. It is. In the forward tilt operation, the lower reaping solenoid valve 5D is activated by turning on the lower reaping switch 2D.
is opened, and the reaping upper and lower cylinders 12 that support the reaping device 11 with respect to the vehicle body 1 are hydraulically shortened to a working position,
In the backward tilting operation, the upper reaping solenoid valve 5U is opened by turning on the upper reaping switch 2U, and the upper and lower reaping cylinders 12 are extended to take a non-working position.

A tilt switch 3 is provided at the top of the steering lever 2 to roll or pitch the aircraft 13 by tilting it left and right and forward and backward, and turning it on by pushing the tilt switch 3 to the lower left 3L and lower right 3R. Well, aircraft 13
is rolled to the left and right, and when pressed to the upper rear 3U and lower rear 3D and turned ON, the rear part of the fuselage 13 is raised or lowered to perform a pitching operation.

The traveling device 6 consisting of a pair of left and right crawlers 14 has a crawler frame 16 supported on both left and right sides of the vehicle body 1 so as to be movable up and down by front and rear parallel links 15, and is disposed along this crawler frame 16. A rubber crawler 14 is spanned between the wheel 17 and a drive sprocket 18 that is pivotally supported at both ends of the axle housing of the traveling transmission case at the front end of the vehicle body 1, and is rotated by the drive of the drive sprocket 18. It is configured so that it can be driven. A steering clutch and a steering brake, which are turned on and off by the push cylinders 8L and 8R, are provided within this traveling transmission case.

The upper end of the front and rear parallel links 15 is connected to the rod 1
9, rolling cylinders 7L and 7R are provided between the rear parallel link 15 and the vehicle body 1, and the crawler frame 16 is raised and lowered by the expansion and contraction of the rolling cylinders 7L and 7R. By changing the height of the left and right crawler frames 16 relative to the
3 to the left and right, and then move the left and right crawler frame 1.
6 and the vehicle body 1 are controlled to have a horizontally parallel height,
Further, the vehicle body 1 and the machine body 13 can be kept horizontally horizontal regardless of the inclination of the left and right crawler frames 16.

The fuselage 13 on the vehicle body 1 also has a combine threshing device 20, a driver's seat 21, and a grain storage tank 22 on the upper side.
, and the reaping device 11, etc., are supported so as to be movable up and down about the support shaft 23 of the front parallel link 15 relative to the vehicle body 1, and between the rear portions of the vehicle body 1 and the vehicle body 13, there is a A pitching link 24 is provided, and the pitching cylinder 9 between the arm 25 of the pitching link 24 and the body 13 is expanded and contracted to move the body 13 up and down about the support shaft 23 with respect to the vehicle body 1 for pitching.

The reaping device 11 is configured to feed the harvested grain culm to the feed chain 28 of the threshing device 20 via the transfer device 27, and cut the threshed culm with a culm cutter 29 at the rear. Hydraulic pump P and tank port T
The hydraulic circuit has a steering control valve 30, push cylinders 8L and 8R that are switched by the steering control valve 30, a throttle valve 31 that is throttled by left and right rotation of the steering lever 2, and the like.
The push cylinders 8L and 8R are activated by switching the steering control valve 30 when the steering switches 2L and 2R of the steering lever 2 are turned on. The pressed steering clutch is disengaged and steering is performed, but the steering lever 2
When the inclination angle is further increased, the throttle valve 31 is throttled, the amount of operation of the push cylinder 8L or 8R is further increased, the steering brake is braked, and the crawler 1 on the steering side is
4 and make a sharp turn.

The hydraulic circuit also includes, in addition to the upper and lower reaping cylinders 12 formed by the upper reaping solenoid valve 5U and the lower reaping solenoid valve 5D, rolling cylinders 7L and 7R formed by the left and right rolling solenoid valves 32 and 33,
A pitching cylinder 9 and the like are provided with a pitching solenoid valve 34, and these solenoid valves 32,
33 and 34 are upper left and lower left solenoids 32U on the output side of the controller CPU having a microcomputer;
32D, upper right and lower right solenoids 33U and 33D, and rear upper and rear lower solenoids 34U and 34D.

When the tilt switch 3 is pushed to the left or right to tilt, the lower left solenoid 32D and the lower right solenoid 33D of the rolling valves 32, 33 on the pressed side are output, and the body 13 is rolled toward the lower left or lower right. can be done. Also, when tilting by pushing forward or backward, the rear upper solenoid 34U of the pitching valve 34 on the pushed side,
Also, the rear lower solenoid 34D is output to change the attitude of the aircraft 13 back and forth.

Reference numeral 35 denotes a vehicle height up/down switch operated by a vehicle height up/down lever 36. By switching this up/down, the left and right rolling cylinders 7L, 7R are extended and contracted in the same direction and by the same amount, and the vehicle body 1 is placed in a horizontally parallel posture. It is lifted and lowered while maintaining the A vehicle speed sensor 37 calculates the vehicle speed while detecting the rotational speed from the shaft of the drive sprocket 18, etc. Reference numeral 38 denotes a vehicle horizontal switch that automatically performs rolling control and pitching control to control and maintain the vehicle bodies 1 to 13 in a horizontal state. Further, a threshing lever switch may be provided in the circuit of the vehicle horizontal switch 38 so that automatic control is started only when the threshing clutch is engaged.

In addition, on the input side of the controller CPU, there are a longitudinal inclination sensor 39 for detecting the longitudinal inclination angle of the aircraft body 13, a lateral inclination sensor 40 for detecting the horizontal inclination angle of the aircraft body 13, and a pitching cylinder 9 sensor. It has a longitudinal stroke sensor 41 that detects the amount of expansion and contraction, and left and right stroke sensors 42L and 42R that detect the amount of expansion and contraction of the left and right rolling cylinders 7L and 7R, and rolling control and pitching control are performed by detection by these sensors. It is configured to do so. 43 is an unload valve.

FIG. 8 shows a vehicle body 1 configured as a link mechanism, in which a front parallel link 15 is supported rotatably around a support shaft 23 at the left and right front ends of the vehicle body 13, and a rear parallel link 15 is supported rotatably around a support shaft 23.
is pivotally attached 48 to the rear end of a substantially horizontal horizontal link 47 which is pivoted 46 at the lower end of a swinging arm 45 which is pivotally attached 44 to the fuselage 13 so as to be pivotable back and forth;
The upper end of this rear parallel link 15 and the swing arm 45
A rolling cylinder 7L that is hydraulically expanded and contracted between
, 7R are provided, and a rod 19 is connected between the upper parts of the parallel links 15 facing each other in the front and rear, and the parallel links 15 are rotated by the expansion and contraction of this rolling cylinder 7L,
The crawler frame 16 can be moved up and down in parallel. Further, the pitching link 24 is provided between the pivot portion 48 of the rear parallel link 15 and the rear part of the fuselage 13,
By rotating the arm 25 around the pivot shaft 49 relative to the fuselage 13 by the expansion and contraction of the pitching cylinder 9, the fuselage 1
3 is moved up and down around the support shaft 23 to perform a pitching action on the crawler frame 16 of the aircraft body 13. The drive sprocket 18 is integrally supported by a support shaft 23 at the front of the fuselage 13. In the illustrated example, the swing arm 45 and the horizontal link 47 are configured separately for the left and right sides, but they may be configured as a single member with the left and right integrated.

In FIG. 9, a rolling switch 50 which is simply a push button is provided on the upper part of the steering lever 2, and when the steering lever 2 is tilted left and right to perform steering,
By pressing the rolling switch 50 to turn on the rolling switch, the vehicle bodies 1 to 13 are rolled so as to tilt downward in the steering direction. For example, the steering lever 2 is tilted from the neutral position to the left side. When steering and turning to the left, simultaneously press the rolling switch 50.
By pressing , the lower left solenoid 32D or the upper right solenoid 33U is output, and the vehicle body 1 and the aircraft body 13 are rolled at a predetermined angle with respect to the left and right crawler frames 16, thereby improving steering turning performance.

[Brief explanation of drawings]

The figure shows an embodiment of the invention.

FIG. 1 is a partial plan view of a combine harvester control platform.

FIG. 2 is a side view of a portion thereof.

FIG. 3 is a block diagram of vehicle attitude control.

[Fig. 4] Hydraulic circuit diagram.

[Fig. 5] Hydraulic circuit diagram.

FIG. 6 is a side view of the traveling device.

FIG. 7 is an overall side view.

FIG. 8 is a side view of a traveling device according to a partially different embodiment.

FIG. 9 is a front view of the partially separated invention.

[Explanation of symbols]

1 Vehicle body 2 Steering lever 3　　　　　　　　Tilt switch

Claims (1)

[Claims] [Claim 1] A steering lever 2 for steering the vehicle body 1 includes:
A steering lever for a combine harvester, etc., which is provided with a tilt switch 3 for rolling or pitching a vehicle body 1.