JPH0614605A - Angle controller of working machine - Google Patents

Abstract

PURPOSE:To proportion an amount going in and out of an inner wire to a rotation amount of a wire connecting arm by connecting an inner wire of a sensor wire mechanism to an inclination sensor so as to allow a wire guide along rotating locus of the wire connecting arm to go in and out. CONSTITUTION:The top of an inner wire 1 of a sensor wire mechanism W is connected to the upper end of a wire connecting arm and the wire connecting arm is rotated by in and out amount of the inner wire. A vertically engaging pin is vertically moved by rotation of the wire connecting arm and a sensor inclination table of a inclination sensor is inclined to same angle as that of a working machine. As a result, the inner wire is slid though the upper face of the wire guide 2 along rotation locus of a wire connecting arm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a sensor unit for tilting a tilt sensor for detecting a tilt angle of a working machine in an angle control mechanism for a working machine mounted on a rear portion of a working vehicle such as a tractor.

[0002]

2. Description of the Related Art Conventionally, a technique relating to a tilt angle control mechanism of a rotary tiller mounted on a tractor has been publicly known. However, in the conventional technique, the tilt sensor for detecting the tilt angle on the working machine side is attached to the upper surface of the tilling cover of the rotary tiller. Therefore, a harness or wire is required to transmit a signal from the tilt sensor on the surface of the tilling cover to the controller on the tractor side, and these harnesses and wires can be easily attached / detached when the work implement is attached / detached. It needed a different configuration.

[0003]

In order to solve the problems of the prior art, an inclination sensor is provided on the main body side of the tractor, so that the inclination of the sensor tilt base is eliminated on the main body side in order to eliminate the need for connecting harnesses and wires. Is provided, the sensor tilting table is rotated in response to expansion and contraction of the lift rod, the tilt sensor is arranged on the sensor tilting table, and the tilt of the tilt sensor is set as the tilt angle of the working machine. . Further, in this configuration, it is necessary to accurately transmit the expansion / contraction amount of the tilt control hydraulic cylinder to the sensor inclining base. In the present invention, the inner wire for transmitting the expansion / contraction amount of the tilt control hydraulic cylinder is accurately connected to the sensor inclining base. The arc-shaped wire guide is configured to transmit the amount of expansion and contraction.

[0004]

The problems to be solved by the present invention are as described above, and the means for solving the problems will be described below. That is, a sensor wire mechanism W for interposing a hydraulic cylinder C for tilt control on one lift rod of a three-point link mounting mechanism for mounting a working machine and detecting the amount of expansion and contraction to the side of the hydraulic cylinder C for tilt control. In the configuration in which the inner wire 1 of the sensor wire mechanism W is connected to the tilt sensor 3 on the main body side, the arc-shaped wire guide 2 with which the inner wire 1 abuts is configured.

Further, the wire guide 2 connected to the inner wire 1, the inclination sensor 3, and the sensor inclination base 4 are integrally formed as a unit, and the sensor unit U is supported and arranged laterally of the hydraulic cylinder case 5. .

[0006]

[Operation] Next, the operation will be described. The inner wire 1 moves in and out of the arc-shaped wire guide 2 as the tilt control hydraulic cylinder C expands and contracts. Since the tip of the inner wire 1 is connected to the upper end of the wire connecting arm 6, the wire connecting arm 6 can be moved with respect to the moving amount of the inner wire 1.
When the outer receiver 20 and the wire connecting arm 6 are linearly connected, the turning locus of the tip of the wire connecting arm 6 is an arc, whereas the inner wire 1 moves the chord portion. Since they are connected linearly, the amount of rotation of the wire connecting arm 6 is not proportional to the amount of movement of the inner wire 1, that is, the amount of expansion and contraction of the tilt control hydraulic cylinder C. In the present invention, the arc-shaped wire guide 2 is arranged along the wire connecting arm 6 so that the amount of expansion and contraction of the hydraulic cylinder C for tilt control corresponds to the amount of rotation of the wire connecting arm 6. The inner wire 1 moves in and out of the arc-shaped wire guide 2 in abutment state.

[0007]

EXAMPLES Next, examples will be described. 1 is a side view of the hydraulic cylinder case 5 and an angle control device for a working machine, FIG.
Is also a rear surface layout view of the hydraulic cylinder case 5 and the angle control device of the working machine, FIG. 3 is a side view of the sensor unit U, FIG. 4 is an enlarged rear view of the sensor unit U, and FIG. 5 is an enlarged view of the sensor unit U. FIG. 6 is a bottom view, FIG. 6 is a side view of the arc-shaped wire guide 2 and the wire connecting arm 6, and FIG.

This will be described with reference to FIGS. 1 and 2. Inside the hydraulic cylinder case 5, a hydraulic cylinder for vertically rotating the lift arm 14 is arranged, and an electromagnetic control valve for controlling pressure oil to the hydraulic cylinder is arranged. A position setting lever 15, a position detection sensor 10, and a working depth detection sensor 11 are provided around the hydraulic cylinder case 5 as a mechanism for transmitting a signal to the electromagnetic control valve. The position setting lever 15 is a lever that is rotated by an operator, and the position setting sensor 12 is arranged at the base of the position setting lever 15. The position setting sensor 12 is also composed of a potentiometer. The position detection sensor 10 is a potentiometer that feeds back a signal according to the rotation of the lift arm 14, and the working depth detection sensor 11 is
It is a potentiometer which is rotated by transmitting a rotation angle of a rear cover of a rotary tiller with a wire. These signals are transmitted to the controller and judged, and the electromagnetic control valve is switched between up, neutral and down to rotate the lift arm 14 up and down.

Further, one of the lift rods interposed between the lift arm 14 and the lower link is configured as a tilt control hydraulic cylinder C, and the tilt control hydraulic cylinder C is provided.
Is also controlled by the tilt control valve. The machine-side sensor 13 and the working-machine-side tilt sensor 3 send signals to the tilt control valve. The main unit side sensor 13 detects the lateral inclination of the tractor, and is only fixed to the tractor. As shown in FIG. 1 and FIG.
3 is a tilling depth detection sensor 1 on the left side of the hydraulic cylinder case 5.
It is fixed near 1.

Conventionally, the working machine-side tilt sensor 3 is fixed to the surface of the tilling cover of the rotary tiller, and the tilt angle of the working machine is directly detected. Since it is necessary to attach and detach the wires, it is troublesome, and it is necessary to provide the working machine side inclination sensor 3 on the tractor side. In the present invention, the working machine side tilt sensor 3 is placed on the sensor tilting table 4, and the sensor tilting table 4 is rotated in the same manner as the working machine,
This is to obtain the same tilt angle as the left-right tilt of the working machine from the working machine side tilt sensor 3.

For this purpose, the amount of expansion and contraction of the tilt control hydraulic cylinder C mounted on the lift rod is taken out by the sensor wire mechanism W, and the inner wire 1 of the sensor wire mechanism W is transmitted to the sensor tilt base 4. I am configuring. Figure 3
7 to FIG. 7, the configuration of the sensor unit U will be described. The sensor frame 9 is fixed to the right side surface of the hydraulic cylinder case 5 via a mounting bracket 19. On the hydraulic cylinder case 5 side of the sensor frame 9, the sensor tilt base 4 is pivotally supported in a substantially horizontal state in the traveling direction via a pivot shaft 18. With this configuration, the sensor tilting table 4
Allows the same inclination as the inclination of the working machine in the direction orthogonal to the traveling direction. On the upper surface of the sensor tilt base 4, the working machine side tilt sensor 3, which is a main part of the present invention, is placed.

On the side of the sensor frame 9 remote from the hydraulic cylinder case 5, the axis of the wire connecting arm 6 is orthogonal to the pivot 18 of the sensor tilting base 4 and perpendicular to the traveling direction. 17 are arranged. The wire connecting arm 6 pivotally supported by the pivot shaft 17 is rotatable in the front-rear direction. An upper and lower engaging pin 7 is fixedly provided at a portion where the lower end of the wire connecting arm 6 is projected. When the wire connecting arm 6 rotates, the upper and lower engaging pin 7 moves up and down to operate the sensor tilting table 4. Tilt to the same angle as the machine.

A return spring 1 is provided on the upper end of the wire connecting arm 6.
6 is connected, and the return spring 16 is configured to rotate the wire connecting arm 6 in the contracting direction with respect to the extending direction of the tilt control hydraulic cylinder C. Further, on the side of the hydraulic cylinder C for tilt control, the outer is fixed to the outer casing receiver on the cylinder case side, and the tip of the inner wire 1 is the wire of the inner wire 1 of the sensor wire mechanism W fixed on the piston side. It is fixed to the tip of the connecting arm 6.

The other end of the outer is fixed to a portion of the outer receiver 20 shown in FIG. The outer receiver 2
When the inner wire 1 starting from the portion of 0 passes through the chord portion of the arc in a straight line between the inner wire 1 and the tip of the wire connecting arm 6, the wire connecting arm 6 does not rotate accurately. The arc-shaped wire guide 2 is configured so that the wire connecting arm 6 accurately rotates in proportion to the expansion / contraction amount of the inner wire 1 as the inner wire 1 rotates.

[0015]

Since the present invention is constructed as described above, it has the following effects. That is, since it is configured as in claim 1, the center of the connecting pin at the tip of the wire connecting arm 6 which is rotated via the inner wire 1 with respect to the expansion and contraction amount of the tilt control hydraulic cylinder C is shown in FIG. P to P1
.About.P2, the inner wire 1 is kept in an arcuate state along the arcuate wire guide 2 as the arcuate shape is rotated. As a result, a rotation angle that is accurately proportional to each other is formed, which in turn leads to an accurate tilt of the sensor tilt base 4 and the working machine side tilt sensor 3. Further, by disposing the arc-shaped wire guide 2, it is possible to dispose the outer receiver 20 in the vicinity of the wire connecting arm 6, so that the sensor unit U can be made compact.

Further, since the constitution is as described in claim 2, by fixing the sensor unit U to the hydraulic cylinder case 5, a reliable and accurate mounting state can be obtained. Further, by using the sensor tilt base 4, the wire connecting arm 6, the arc-shaped wire guide 2 and the like as the sensor unit U, the assembling property and the inspection and repair property could be improved. Further, the sensor unit U is the hydraulic cylinder case 5
Since it is located laterally between the fender and the fender, the position is higher than the center of the tire, and it is possible to avoid scattering of muddy water and clods.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic cylinder case 5 and an angle control device for a working machine.

FIG. 2 is a rear view of the hydraulic cylinder case 5 and the angle control device of the working machine.

FIG. 3 is a side view of a sensor unit U.

FIG. 4 is an enlarged rear view of the sensor unit U.

FIG. 5 is an enlarged bottom view of the sensor unit U.

FIG. 6 is a side view of the arcuate wire guide 2 and the wire connecting arm 6.

FIG. 7 is a bottom view of the same.

[Explanation of symbols]

 C Hydraulic cylinder for tilt control W Sensor wire mechanism 1 Inner wire 2 Arc wire guide 3 Work machine side tilt sensor 4 Sensor tilt table 5 Hydraulic cylinder case 6 Wire connection arm 7 Vertical engagement pin 9 Sensor frame

Claims (2)

[Claims] 1. A sensor wire for interposing a hydraulic cylinder C for tilt control on one lift rod of a three-point link mounting mechanism for mounting a working machine, and detecting the amount of expansion and contraction to the side of the hydraulic cylinder C for tilt control. A mechanism W is provided, and the sensor wire mechanism W
An angle control device for a working machine, characterized in that an arc-shaped wire guide 2 with which the inner wire 1 abuts is configured in the configuration in which the inner wire 1 is connected to the tilt sensor 3 on the machine side. 2. A wire guide 2, a tilt sensor 3, and a sensor tilt base 4 which are connected to the inner wire 1 according to claim 1.
Is integrally formed as a unit structure, and the sensor unit U is supported and arranged laterally of the hydraulic cylinder case 5.