JPS61274602A - Rolling apparatus of earth working machine - 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] [Industrial Application Field] The present invention is designed to enable the working equipment to follow the field surface or to maintain a certain inclination angle with respect to the horizontal plane even if the traveling machine body tilts left and right during work travel. It is configured to be capable of rolling operation, and more specifically, the ground work device is connected to the traveling machine body via a drive mechanism so as to be able to freely roll, and the left and right inclination angle of the ground work device is adjusted to the traveling machine body or the ground work device. A sensor for detection is provided, and the drive mechanism is operated based on the detection result of the sensor, so that the ground work device is configured to take a tilted posture corresponding to a tilt angle set by a rolling posture setting device. This article relates to a rolling device for a ground-based work machine.

[Conventional technology]

In this type of rolling device for a ground-based work machine, a conventional rolling attitude setting device is of a type that simultaneously sets the left and right tilt direction and tilt angle, as shown in FIG.

[Problem that the invention seeks to solve]

Therefore, if the field is on a slope as shown in Figure 4 ((), (TI)), the working device (2), which is in an inclined position along the slope, can be reversed in the working direction of the traveling body (1). Accordingly, it was necessary to reverse the angle of inclination from the horizontal direction while keeping the absolute angle of inclination from the horizontal direction constant, and for this purpose, the setting device had to be reset.

Moreover, when setting using a setting device, it is necessary to check the inclination angle scale while setting it, making the operation complicated compared to turning operation, which complicates steering operation. . Furthermore, since the user tends not to pay sufficient attention to the operation during setting, the inclination angle may not be set accurately.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus that can easily reverse the tilting direction of a working device by adding a simple mechanism.

[Means for solving problems]

The characteristic configuration of the present invention is that a switch is provided to change the posture of the working device set to the left or right tilted posture to the opposite direction while maintaining the same absolute tilt angle with respect to the horizontal plane. The actions and effects are as follows.

[For production]

In other words, if you want to reverse a working device that has been tilted in either the left or right direction using the rolling setting device, you only need to operate the switch without operating the setting device. The operation is also easy, as it is not complicated and requires accurate positioning along the angle scale as in the past, but can be operated with one touch, such as a button or toggle type.

〔Effect of the invention〕

As a result, it is possible to reduce the complexity of the steering operation during the turning operation, and the modification for this purpose can be as simple as providing a switch.

〔Example〕

As shown in Fig. 5, a tilling rotary as an example of a ground work device (2) is attached to the rear of a tractor as a traveling machine (1), and a tilling rotary as an example of a ground work device (2) is attached to the longitudinal axis of the machine provided at the rear end of the machine (1). (X) Extending portions (4A) extending rearward from both lateral sides of the swinging bracket (4) that can swing around;
(4A) so as to be vertically swingable around the horizontal axis (Y), and a pair of left and right lift arms (3),
(3), a lift rod (7), and a hydraulic cylinder (8) configured to serve as the lift rod are interlocked, and further,
A sensor (S+) is attached to the tractor (1) side to detect the rolling of the tilling rotary (2) accompanying the rolling operation of the tractor (1), that is, the horizontal tilt angle (θ) with respect to the horizontal. Based on this, a rolling control mechanism is provided which automatically corrects the left and right attitude of the tilling rotary (2) relative to the ground to a set attitude by expanding and contracting the hydraulic cylinder (8).

The lift arms (3), (3) are driven up and down by hydraulic cylinders (9), so that the tilling rotary (2) as the ground working device can be raised and lowered with respect to the tractor (1). A sensor (S2) for detecting the lift angle of the lift arms (3), (3) with respect to the tractor (1) is provided at the lift arm fulcrum.

On the other hand, a hydraulic cylinder (
8) is provided with a sensor (S3) for detecting the amount of expansion and contraction thereof, and is configured to detect the length displacement of the lift rod (8).

The inclination angle detection sensor (S+) is configured to non-contactly detect the amount of swing displacement of a weight hanging down so that it can swing left and right, using a Hall element or a differential transformer, and The lift angle detection sensor (S2) uses a rotary potentiometer, and generates a voltage corresponding to each rotation angle (θ).

Further, a linear slide type potentiometer is used as the cylinder length detection sensor (S3), and the cylinder length detection sensor (S3) is a linear slide type potentiometer.
8) is configured to generate a voltage corresponding to the amount of expansion and contraction.

As shown in FIG. 6, the connection structure of the sensor (S3) to the lift rod (8) will be described in detail.

A hydraulic cylinder (8) is attached via a connecting pin (11) to a fork-shaped member (10) connected to the lift arm (3) so as to be relatively swingable, and the outside of the fork-shaped member (10) is attached. The sensor (S3) mounting bracket (12) is attached together with the hydraulic cylinder (8) by the connecting pin (11) from the other side. The connecting pin (11) is formed into a stepped pin whose diameter (D) is larger at the portion inserted into the bracket (12) of the sensor (S3) than the other portion, and the length of this large diameter (D) portion is The thickness is slightly larger than the thickness of the bracket (12). Therefore, even if a thrust force acts on the bracket (12) which is sandwiched between the head of the connecting pin (11) and the fork-shaped member (10) during rolling operation, the pressing force against the bracket (12) sensor (S3
) can reduce restrictions on its operation.

Next, a control circuit that adjusts the horizontal tilt attitude of the tilling rotary (2) based on the detection results of the sensors (S+), (Sg), and (Ss) will be described in detail. The aircraft (1
) The signal from the inclination sensor (S, ) which detects the inclination angle (θ) of
A comparison circuit (15) outputs a target voltage (v2) corresponding to the amount of expansion and contraction, and compares and controls the detected voltage (V, ) after amplification from the cylinder length detection sensor (S3), and performs control after control. It is configured to output the voltage to the electromagnetic valve (16), and the target voltage (v2) and the sensor (S3) are converted based on the gas inclination angle detection value of the sensor (S,).
The amount of expansion and contraction of the hydraulic cylinder (8) is controlled so that the detected voltage (VL) corresponding to the cylinder length of
The structure is such that the set angle with respect to the horizontal plane can be maintained regardless of the left and right inclination of the plane.

As shown in Fig. 2, the rolling attitude setter (13) has a double volume type, and as the knob (17) is rotated in a certain direction, one volume I (18
) is set so that the output voltage increases sequentially, and the other volume II (19) is set so that the output voltage sequentially decreases. Moreover, these two volumes I, n
In (18) and (19), the rate of increase/decrease in electrical resistance in the increasing direction and decreasing direction is set to be the same, with the midpoint of the adjustment range at the center. And these two volumes I, n (
18) and (19) are switched to the arithmetic circuit (14) by switching the push button type changeover switch (20) with a built-in lamp.
) are connected to each other individually. In other words, the fourth
As shown in the figure, when the knob (17) is rotated from the horizontal position by (θI) to the left, for example, in order to set the inclination angle of the tilling rotary (2) to the left (<?1), the volume 18) is the slope angle (
θ1) so as to output a low voltage (v2) corresponding to the voltage difference (L V
z) = Voltage (
V, ) is output. Therefore, as shown in FIG. 4, when the tractor (1) turns at the edge of a ridge while working on a slope,
), the absolute inclination angle from the horizontal plane (
The tilling rotary (2) can be reversed in the opposite direction to the left and right while keeping 1θ and D the same.

[Another example]

As shown in FIG. 7, the rolling attitude setter (13
), a doble switch may be employed as a setting device that displays the absolute angle of inclination from the horizontal plane and a changeover switch (20).

[Brief explanation of the drawing]

The drawings show an embodiment of a rolling device for a ground-based work machine according to the present invention, in which FIG. 1 is a control circuit diagram, FIG. 2 is a schematic perspective view of a rolling attitude setting device, and FIG. 3 is a rolling attitude setting device and an inclination direction. Layout diagram of the changeover switch, Figure 4 (A), (T
I) is a rear view showing how the tractor is working on a slope, FIG. 5 is a perspective view showing the connected state of the working device, FIG. 6 is a vertical cross-sectional view showing the installed state of the stroke sensor, and FIG. 7 is the inclination direction. FIG. 7 is a layout diagram showing another embodiment of a changeover switch and a rolling attitude setter. (1)... Traveling body, (2)... Ground work device, (8)... Drive mechanism, (13)...
・・・Rolling posture setting device, (20)・・・・・・
switch. .

Claims (1)

[Claims] The ground work device (2) is connected to the traveling body (1) via a drive mechanism (8) for rolling operation, and the ground work device (2) is connected to the traveling body (1) or the ground work device (2). A sensor (S_1) that detects the left and right inclination angle of
), and operates the drive mechanism (8) based on the detection result of the sensor (S_1) to adjust the ground work device (2) to the inclination angle set by the rolling attitude/setting device (13). A rolling device for a ground-based working machine configured to take a tilted position such that the work equipment (2) is set in a tilted position to either the left or right while maintaining the same absolute tilt angle with respect to a horizontal plane. A rolling device for a ground-based work machine equipped with a switch (20) that changes the posture in opposite directions.