JPH0458802A - Agricultural work car - Google Patents

Abstract

PURPOSE:To solve trouble of control works by disposing the upper motion- detector means of a parallel control means on a member for controlling the upper setting position of an operation lever for setting the lift position of a working device. CONSTITUTION:A position control mechanism for lifting a working device to a height corresponding to the operation position of an operation lever 3 is disposed. A parallel control means for recovering the working device to a counter-frame parallel posture with the lifting of the working device. A limit member 18 for contacting and limiting the upper setting position of the operation lever 3 is fixed with a bolt 20 in a position-adjustable state, and a limit switch SW is attached to the limit member 18 to form a detection member for a parallel control means.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention connects a working device to the rear of a traveling machine so that it can be raised and lowered as well as rolled left and right, and the working device is raised to a height corresponding to the operating position of an operating lever. The present invention relates to an agricultural vehicle that is equipped with a position control mechanism that forcibly raises the working device, and a parallel control means that forcibly restores the working device to a position parallel to the machine body as the working device is raised.

[Conventional technology]

In the above agricultural vehicle, conventionally, for example,
As disclosed in the drawings in Publication No. 74206, the contact regulating member for setting the upper limit of the operation lever for the position verification mechanism is attached to the lever guide fixing part so that the position can be changed and adjusted, and the operation of the parallel control means is The limit switch for detecting the device's upward movement was attached to the lever guide fixing part on the side of the movement area of the operating lever.

[Invention or problem to be solved]

However, in the above-mentioned conventional structure, the position adjustment work of the abutment regulating member and the position adjustment work of the limit switch must be performed separately, which has the disadvantage of being troublesome and time-consuming.

The present invention aims to solve the above-mentioned problems.

[Means to solve the problem]

A characteristic configuration of the present invention is that, in the agricultural vehicle described at the beginning, a regulating member for regulating the contact of the upper limit setting position of the operating lever is provided in a position adjustable manner, and the regulating member is provided with a rising motion detecting means in the parallel control means. It is located at the point where it is attached.

[For production]

When the position of the restriction member is changed in order to change and adjust the upper limit setting position by the position control mechanism, the position of the rising motion detection means is also changed integrally, so that the adjustment can be performed at once.

〔Effect of the invention〕

Therefore, according to the present invention, the troublesome adjustment work can be eliminated through rational improvement, and the relative positional relationship between the upper limit setting position of the operating lever and the parallel restoring operating position can always be maintained the same. Ta.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 5 shows the rear part of an agricultural tractor, which is an example of an agricultural vehicle according to the present invention.

This agricultural tractor has a link mechanism (1) at the rear of the traveling body.
A rotary tilling device (2) (an example of a working device) is connected through the rotary tiller so that it can be driven up and down and rolled left and right. and a position control mechanism (A) for forcibly raising the tilling device (2) to a height relative to the machine body corresponding to the operating position of the operating lever (3); ) and a parallel control means (C) for forcibly restoring the tilling device (2) to the parallel attitude to the aircraft as the tilling device (2) rises. ) are provided for each.

More specifically, as shown in Fig. 4, a balance swing link (6) is pivotally supported on a spool (5) of a hydraulic control valve (V+) of a lift cylinder (4) for driving the tiller up and down. An operation arm (7) that swings in conjunction with the operation lever (2) is connected to one end of the (6), and a feedback link (10) is connected to the lifting lift arm (9) at the other end.
) A feedback arm (11) that moves in conjunction with the
is concatenated. In this way, when the lift arm (9) rises to the position corresponding to the swing operation position of the control lever (3), the hydraulic control valve (■1) returns to neutral, and the tilling device (2) or its position is The position control mechanism (A) is configured to maintain the position control mechanism (A).

As shown in Fig. 3, the left and right lift arms (9) for lifting and lowering are connected to the left and right lower links (12).

Left and right lift rods (13) connected to (12), (1
3) is provided telescopically via a rolling cylinder (14), and a stroke sensor (15) for detecting the amount of expansion and contraction is provided on the side of this rolling cylinder (14). A tilt angle sensor (16) for measuring the tilt angle is provided, and both sensors (15),
Based on the signal from (16), the control device (17
) controls the rolling control mechanism (B).

A tilling device (2) is installed near the operating lever (3).
A limit switch (
SW) and this limit switch (S
Based on the detection operation of the control device (17), the electromagnetic control valve (■2
) is configured to control and drive the parallel control means (C).

As shown in FIGS. 1 and 2, a regulating member (18) that limits contact with the upper limit setting position of the operating lever (3)
) is fixed to the lever guide fixing member (19) with a bolt (20) so that the position can be adjusted freely, and this regulating member (18)
The limit switch (SW) is attached to the.

In this way, it is not necessary to separately adjust the position of the limit switch (SW), and the hassle is eliminated, and the upper limit setting position of the operating lever (3) and the limit switch (SW) are adjusted.
) will always be maintained constant.

The position control mechanism (A) may have an electrical feedback structure using a potentiometer instead of a mechanical feedback structure.

Further, in place of the limit switch (SW), various detection means such as a photoelectric type or an electromagnetic type may be used.

It should be noted that the present invention is not limited to the structure shown in the accompanying drawings by adding reference numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the agricultural vehicle according to the present invention, in which FIG. 1 is a plan view of the operating lever arrangement section, FIG. 2 is a side view of the operating lever arrangement section, FIG. 3 is a control block diagram, and FIG. The figure is a perspective view of the position control mechanism, and FIG. 5 is a perspective view of the rear part. (2)... Working device, (3)... Operation lever (18)... Regulation member, (A)...
...Position control mechanism, (C) ...Parallel image forming means, (SW) ...Detection means.

Claims (1)

[Claims] A working device (2) is connected to the rear of the traveling machine so that it can be raised and lowered as well as rolled left and right, and the working device (2) is forcibly raised to a height corresponding to the operating position of the operating lever (3). The agricultural vehicle is equipped with a position control mechanism (A) and a parallel control means (C) for forcibly restoring the working device (2) to a parallel attitude with respect to the machine body as the working device (2) rises. A regulating member (18) for abutting and regulating the upper limit setting position of the operating lever (3) is provided in a freely adjustable position, and the regulating member (18) is provided with a rising motion detecting means ( A farm vehicle equipped with SW).