JPS62198304A - Control structure of earth working apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention connects a ground work device to a traveling vehicle body so that it can be driven up and down, and can be rolled. A ground work system equipped with a self-IIFI plowing depth control mechanism that raises and lowers the ground work table Wt so as to maintain the IIJ attitude at a predetermined attitude, and a cutting A-ring control mechanism that maintains the rolling attitude of the ground work device with respect to the ground at a predetermined attitude. Pay close attention to the control structure of work equipment.

[Conventional technology]

Conventionally, as a control structure equipped with an automatic rolling mechanism as described above, there is one shown in Japanese Utility Model Application Publication No. 57-7420B. The structure is organized.

[Problem that the invention seeks to solve]

Generally, in raising operations, self-help plowing depth control is often performed at the same time as the automatic rolling mechanism. Control is performed so that the ground work equipment is set to a predetermined rolling posture by extending or contracting the trot as shown in Figure 7. At the same time, the plowing depth of the ground work equipment is controlled by feedback from the rear covering force and the like. The set depth is maintained by the control.

The rear cover is normally formed over the entire width of the rear of the ground work equipment, so when the vehicle body tilts from side to side as described above, the ground work equipment will not be able to move into the prescribed rolling position. Before being restored, the sloped side of the rear cover may be pushed up by the ground, resulting in a shallow plowing depth.

In other words, the structure is such that the rear cover swings integrally.
The purpose of the present invention is to solve the problem of having to control the lifting of the ground working equipment even when the plowing depth has not changed in the deeper direction as a result of the whole body oscillating even if the side end is not pushed up. The purpose of this invention is to obtain a control structure in which the plowing depth does not become shallow even when the ground working device is significantly deviated from the predetermined A-ring posture by rational modification.

[Comparative means to solve problems]

A feature of the present invention is that in the control structure having the above configuration, when the rolling attitude of the ground work device deviates from the predetermined attitude, the outside rt, fi1. The method is provided with a means for automatically changing the predetermined rocking posture of the rear cover to the side where the set plowing depth increases as the plowing depth increases, and its functions and effects are as follows. ] For example, as shown in FIGS. 1 and 932, #i
Then, when the ground working device (4) deviates from the predetermined rolling posture while the self-help rolling control and the self-help plowing depth control are being performed simultaneously, a means Q61 is configured to change the set plowing depth t. The plowing depth setting device (16a) is set to a deeper depth as the deviation from the predetermined posture increases, and at the same time, the plowing depth is set by the operation of the relay (16b).
17n depth setting device [(Hl
The signal from a) will be input to the control device (8).

〔Effect of the invention〕

Therefore, by relatively simple modification of the conventional control structure by providing a means for changing the plowing depth, a control structure that prevents the plowing depth from becoming shallow even if the rear cover swings upward due to the inclination of the ground working device can be created. Compared to changing the plowing depth, for example, if the vehicle body tilts sharply and greatly, the ground working device can be controlled to rise, and the plowing depth can be changed to prevent damage to the ground working device or damage to the ground working device. It also has the effect of preventing overload.

〔Example〕

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

As shown in Fig. 2, an external power take-off shaft (21 axis (rotatable around PI
A rotary type ground work device (4) is connected to the traveling vehicle body (1) via a point linkage mechanism (3) that can freely swing I/C around the left-right axis [Q], and Running vehicle body f
Throw it at the rear of il; f'14! J7 Toshiring (6)
A pair of left and right 7-toe arms (6+, +61
and the ground work device (4) are connected via a pair of left and right lift rods (7) to form an agricultural tractor.
It swings up and down around the axis +01 by the operation of , and
The pair of lift rods (71, t, 71, 71, and 10,000 others) are arranged to be able to roll around the axis II'.

Further, the ground working device (4) is controlled to rise and fall via an own plowing depth control mechanism that is provided at the rear of the ground working device (4) and maintains the swinging posture of the rear cover (4a) at a predetermined posture. ,
Further, the rolling posture of the ground work device +4) with respect to the ground is controlled via a self-help rolling control mechanism that maintains the rolling posture in a predetermined posture.In other words, as shown in FIG. a control device (8) for /, a setting device (9) for setting the amount of left and right inclination of the ground work device (4), and a lift rod (7).
)'s Naka&fjl detection stroke senpu 110+,
Tilt sensor that detects the amount of tilt of the traveling 11L body (1) to the left and right? CIl+, a setting device (121, l1iJ) for setting the plowing depth of the ground working device (4), a sensor for detecting the swinging posture of the cover (4a), and the control device +1! (81, The first solenoid valve (14) is controlled by a signal from the control device (8).
It also controls the supply and discharge of hydraulic oil to the 21st! Magnetic valve (151
controls the supply and discharge of hydraulic oil to the lift rod (7), which is configured to expand and contract using hydraulic pressure.

In addition, both projectors (91, (121) are dials (9a) respectively.
.

(12a), and the tilt sensor (111) is operated by a weight (lla).

In addition, as shown in FIG. 1, the above-mentioned control structure has the following feature: the rolling attitude of the ground work device (4) is different from the predetermined attitude η to the outside f′.
In the case of L, a means (119) is provided for automatically changing the predetermined swinging posture of the rear cover (4a) to the side with a larger set plowing depth as the outside A becomes larger.

In other words, the means +161 is a plowing depth setting device (ltla) that outputs a plowing depth setting signal to the deeper side in response to a signal from the inclination sensor (II), and an output signal from this plowing depth setting device (16a). A relay (ltlb
), the relay (tab) F1 control device (8)
It is configured to operate with a signal from.

For example, if the traveling vehicle body (fl) is tilted significantly and the ground working device (4) is moved from the predetermined rolling posture to >1, the set plowing depth is automatically set to be deeper according to the amount of deviation. .

[Another example]

In addition to the embodiments described above, the present invention also provides an arrangement in which, as shown in FIG.
61, +61 and a pair of lift rods (71, F7+ 10,000 (7) '(i-
The side where the lift rod (7) of this telescopic structure contracts, that is, the ground work table (tH4)
It may be configured such that the changing mechanism Qt1 is activated only when rolling in the direction of lifting the entire body.

Further, in the present invention, the control device v11 may be configured with a microprocessor, and the program set in the microprocessor may include the above-described pattern <fl:lIl.

[Brief explanation of drawings]

The drawings show an embodiment of a control structure for a ground work device according to the present invention, FIG. 1 is a block circuit diagram showing the configuration of the control structure, FIG. 2 is a perspective view of the rear part of an agricultural tractor, and FIG. It is a perspective view of the rear part of an agricultural tractor showing another example. fil... Traveling vehicle body, (4)... Ground work device, (4a)... Rear cover, (+61・
·····means.

Claims (1)

[Claims] The ground work device (4) is connected to the traveling vehicle body (1) so that it can be driven up and down and can be rolled. a self-help plowing depth control mechanism that raises and lowers the ground working device (4) to maintain the ground working device (4);
4) A control structure for a ground work device equipped with an automatic rolling control mechanism that maintains the rolling posture at a predetermined posture, which controls the amount of deviation when the rolling posture of the ground work device (4) deviates from the predetermined posture. A control structure for a ground working device, which is provided with means (16) for automatically changing the predetermined rocking posture of the rear cover (4a) to a side with a larger set plowing depth as the plowing depth increases.