JPH05168302A - Sensor wire of tractor or the like - Google Patents

Abstract

PURPOSE:To accurately carry out pushing and pulling operations of a sensor wire used for posture control of tractor working machine, etc., in reduced bending of the wire. CONSTITUTION:In a sensor wire 3 for connecting the space between an operating member 1 and a sensor 2, a slidable sensor rod 9 is provided along a coupling end part 8 ranging between the operating member 1 coupling the inner wire 4 and an outer receiving member 7 for receiving the tip of an outer wire 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor wire for a tractor or the like, and can also be used for combine harvesters, rice transplanters, other civil engineering, construction machinery and the like.

[0002]

2. Description of the Related Art In a tractor working machine, a working device connected to a lower link, a top link, or the like of a vehicle body is maintained and controlled in a horizontal posture regardless of the lateral inclination of the vehicle body. In order to detect the tilt angle of the working device with respect to the vehicle body, when connecting the lower link and a sensor such as a potentiometer on the vehicle body with a wire, the connecting end side of the wire with respect to the lower link is An accurate tilt angle may not be detected due to bending or distortion.

[0003]

SUMMARY OF THE INVENTION The present invention is directed to an actuating member 1.
Along the connecting end portion 8 between the connecting portion 5 of the inner wire 4 for the actuating member 1 of the sensor wire 3 for connecting between the sensor 2 and the sensor 2 and the outer receiving member 7 for receiving the tip of the outer wire 6. A sensor wire such as a tractor provided with a slidable sensor rod 9 is used.

[0004]

When the posture of the working device changes with respect to the vehicle body, the inner wire 4 is pushed and pulled by the operation of the operating member 1 and the sensor 2 is interlocked. At the time of pushing and pulling the inner wire 4, the sensor rod 9 slides in the connecting end portion 8 in a substantially parallel state, so that the pushing and pulling direction of the inner wire 4 is constant, and the operating member 1 and the outer member A portion of the connecting end 8 of the inner wire 4 between the receiving member 7 and the outer wire 6 does not bend or bend, and the movement of the actuating member 1 can be accurately transmitted to the sensor 2.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated example shows a case where the present invention is used for horizontal control for controlling a working device of a tractor in a horizontal posture. At the rear end of the transmission case 11 of the four-wheel drive tractor body 10, a pair of left and right lower links 12 and a top link 13 are used as a working device, which is a tilling device 14.
Is connected so that it can be raised and lowered. Reference numeral 15 is an engine mounted on the front portion of the vehicle body 10, and 16 is a steering handle for steering front wheels 17. 18 is a rear wheel, 19 is a cockpit, 20
Is a fender, 21 is a hydraulic case above the transmission case 11, and has a hydraulic cylinder, a hydraulic control valve 22 and the like inside, and a lift arm 24 that is rotated around a lift shaft 23 by this hydraulic cylinder is provided. The lift arm 24 and the lower link 12 are connected by a lift rod 25 and a rolling cylinder 26 so that the tiller 14 can be vertically moved and horizontally controlled. Reference numeral 27 denotes a horizontal sensor provided on the hydraulic case 21 to detect the inclination angle of the vehicle body 10 in the left-right direction.

The tiller 14 has a tiller claw 29 arranged around a horizontal tiller shaft 28, and is rotatably tilled from the rear end of the mission case 11 via a power take-off shaft 30. A flat plate 31 is provided at the rear of the tiller 14.
Is provided so as to be vertically rotatable so as to level the tillage mark, and a tilling depth sensor 32 that detects the vertically rotating angle to determine the tilling depth is provided.

The structure for controlling the working depth is the working depth sensor 32.
And the elevation control valve 33 of the hydraulic control valve 22 control the tilling depth to be tilled by the tilling device 14 so that the tilling depth is set in advance by the tilling depth setting device 34. Lift arm 24
By the vertical control rotation of the lower link 12, the top link 13 and the like, the tiller 14 is moved up and down,
The working depth is controlled. At this time, the rotation angle of the lift arm 24 is detected by the potentiometer 35, and the lift arm 24 is controlled so as to be maintained at the depth set by the tilling depth setting device 34.

Further, the structure of the horizontal control is the horizontal sensor 27.
And the horizontal control valve 36 of the hydraulic control valve 22 and the sensor 2, and when the horizontal sensor 27 detects a certain lateral tilt of the vehicle body 10, the horizontal control valve 36 is output to lift the lift arm 24 and the lower link. The rolling cylinder 26 between 12 and 12 is expanded / contracted, the up-and-down position of the left and right lower links 12 is changed, and the tilling device 14 is controlled to a horizontal posture. At this time, the sensor 2 detects the vertical difference between the left and right lower links 12 and performs feedback control so as to compare with the input value from the horizontal sensor 27.

The sensor 2 is composed of a potentiometer and is attached to the fender 20 on the side of the cockpit 19. The sensor shaft 37 of the sensor 2 has an arm 38 and the sensor case 39 is integrally formed with an outer receiving member. The sensor wire 4 has one end of the outer wire 6 received by the outer receiving member 40, and the one end of the inner wire 4 is connected to the arm 38.

In order to detect the difference between the relative vertical positions of the left and right lower links 12, at the rear end of the mission case 11,
The crankshaft 41 is rotatably provided, and the crankshaft 4
Crank arm 42 at one end and lower link 1 at one side
2 is connected by a rod 43, and the crank arm 44 at the other end of the crank shaft 41 and the lower link 12 on this side are connected.
The tip of the sensor wire 3 is connected to and. The crank arm 44 is provided with an outer receiving member 7 which is vertically rotatable around a pin shaft 45 to receive the tip end portion of the outer wire 6, and the lower link 12 is vertically rotatable around a pin shaft 46. The operating member 1 is provided, and the tip of the inner wire 4 is connected to the operating member 1. A portion of the inner wire 4 extending from the outer receiving member 7 to the actuating member 1 is used as a connecting member 8, and the outer periphery of the connecting end portion 8 is covered with an elastic rubber boot 47.

A sensor rod 9 is integrally provided on the actuating member 1, and an upper end portion of the sensor rod 9 is approximately parallel to the connecting end portion 8 with respect to the boss 48 of the outer receiving member 7. It is slidably inserted, and the bush 4
9, dust seals 50, 51, etc. are provided, and grease 52 is injected into the inside to keep the sensor rod 9 sliding smoothly. 53 is the grease nipple.

When the horizontal control mode is selected by the mode setter 54, the horizontal sensor 27 detects the lateral inclination of the vehicle body 10 to output the horizontal control valve 36 via the controller CPU having a microcomputer.
The rolling cylinder 26 is expanded and contracted, and the lower link 1 on one side
Raise and lower 2. Since the ascending / descending movement of the lower link 12 is interlocked with the sensor 2 via the sensor wire 4, when the detection value of the sensor 2 becomes a value corresponding to the detection value of the horizontal sensor 27, the vehicle body 10 tilts. Even if it is, the tilling device 14 is in a horizontal state on the left and right. Reference numeral 55 is a return of the arm 38.

At this time, the expansion and contraction of the rolling cylinder 26 causes the lower link 12 to move up and down to push and pull the sensor rod 9 together with the inner wire 4, but the operating member 1 and the outer receiving member 7 serve as the sensor rod 9. By sliding, the vertical spacing is changed in parallel, and the inner wire 4
Since the pushing and pulling of the connecting end portion 8 is guided, the bending and distortion of the connecting end portion 8 can be reduced.

[Brief description of drawings]

 The figure shows an embodiment of the invention.

FIG. 1 is a side view of a main part.

FIG. 2 is a front view of a part thereof.

FIG. 3 is a side view of a part of the tractor.

FIG. 4 is a rear view thereof.

FIG. 5 is a side view of the entire tractor.

FIG. 6 is a block diagram of partial control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operating member 2 Sensor 3 Sensor wire 4 Inner wire 5 Connecting part 6 Outer wire 7 Outer receiving member 8 Connecting end part 9 Sensor rod

Claims (1)

[Claims] 1. Between a connecting portion 5 of an inner wire 4 of the sensor wire 3 for connecting the operating member 1 and the sensor 2 to the operating member 1 and an outer receiving member 7 for receiving a tip of an outer wire 6. A sensor wire, such as a tractor, provided with a slidable sensor rod 9 along the connecting end portion 8 extending across.