JPS61257101A - Working machine mount apparatus of agricultural tractor - 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 (a) Industrial application field The present invention is directed to a work machine such as a rotary tiller attached to an agricultural tractor that moves in parallel when the agricultural tractor turns, and as the agricultural tractor turns, the field of the field changes. rotate the soil of
This invention is intended to prevent soil from being unevenly distributed along the ridges.

(B) Prior Art Conventionally, there has been a well-known technique for keeping a working machine horizontal or at a constant angle of inclination when the machine of an agricultural tractor is tilted from side to side. For example, Utsukai Sho 59-17951
As in Publication No. 0.

Although it is similar to an agricultural tractor in that the angle of the working machine is independently controlled, the present invention particularly allows the agricultural tractor and the working machine to be folded in the center in a plan view.

(c) Problems that the invention attempts to solve The objects of the present invention are as follows.

Although the working equipment attached to conventional agricultural tractors is equipped with technology to always keep it horizontal against up and down inclinations, it was impossible to adjust the work equipment to bend left or right on a horizontal plane. be. Therefore, if a tractor tries to turn around a curved ridge or corner of a field with a work equipment attached, even if the tractor's turning radius is small, the turning radius of the work equipment attached to the rear of the tractor will become large. There was a problem in that the work equipment was swung wildly and moved in parallel, scratching the soil and being carried around.

Since this collected soil gathers at the edge of the ridge, the operator must manually correct the uneven distribution of the soil after completing the work.

The present invention solves these problems, and provides a tilling device that replaces the conventional configuration that could only perform linear work, allows for free curve plowing on deformed land, and provides good soil leveling after finishing. That is.

Further, according to the present invention, since the traveling trajectory caused by the steering of the machine body and the direction of the reaction force of the driving force of the working machine match, the running becomes stable and the straightness is improved.

(d) Means for Solving the Problems The objects of the present invention are as described above. Next, the structure for achieving the objects will be explained.

An actuator is installed between the agricultural tractor and the work equipment attached to it, which allows the center bending adjustment between the two in plan view, and a detector is installed to detect the steering angle of the steering handle. The working machine is configured to turn based on the detected value of the angle detector, drawing a turning trajectory that is substantially the same as the turning trajectory of an agricultural tractor.

(E) Embodiments and Functions The objects and structure of the present invention are as described above. Next, the structure of the embodiments shown in the attached drawings will be explained.

Fig. 1 is an overall plan view of the agricultural tractor of the present invention, Fig. 2 is a plan view showing the state of the agricultural tractor when turning, Fig. 3 is a side view of the vicinity of the steering gear box, and Fig. 4 is a plan view as well. FIG. 5 is a control block diagram.

Referring to FIGS. 1 and 2, the overall configuration will be explained.

The agricultural tractor has front wheels of 14L/14R and rear wheels of 16L/1.
Supported by 6R. The front wheels 14L and 14R are steering wheels, and the rear wheels 16L and 16R are drive wheels. By turning the steering handle 15 by the operator,
The pitman arm 1 rotates back and forth, the tie rod 20 and knuckle arm 22 are operated via the drag rod 3, and the front wheels 14L and 14R are steered and rotated. A three-point link type work equipment mounting device protrudes rearward from the rear of the transmission case of an agricultural tractor.

The three-point link type work machine mounting device consists of a top link 21 and lower links IIL and 11R, and power is transmitted through a universal joint shaft 10.

In the present invention, the actuator 12 is interposed in the lower link IIL, and the rotary tiller 9 is rotated back and forth on the field surface in a plan view by the actuator 12. The rotary tilling device 9 is attached to a three-point link type work machine mounting device consisting of a top link and two drawer links 11L and IIR.

In Figures 3 and 4, the steering gear box 5
To explain the structure around the steering wheel 15, rotation of the steering handle 15 is transmitted to the steering gear box 5 by a shaft inside the steering shaft cylinder 7. A bevel gear in the steering gear box 5 causes the pitman arm 1 to rotate back and forth, and the pitman arm 1 steers and rotates the front wheels 14L and 14R via the drag rod 3.

The steering angle detector 2 of the present invention is supported by a bracket 4 protruding from a steering gear box 5. A sensor arm 8 protrudes from the steering angle detector 2, and the sensor arm 8 rotates together with the pitman arm 1. 6 is a clutch housing.

Next, a control block diagram will be explained based on FIG.

Based on the detected value detected by the steering angle detector 2, the central processing unit 13 issues a signal to operate the solenoid valve 17,
This causes the actuator 12 to expand and contract. By expanding and contracting the actuator 12, a working machine such as a rotary tiller is moved to a predetermined radius of curvature R from the rotation center of the agricultural tractor.
The actuator position detector 19 detects and confirms that this has occurred, switches the solenoid valve 17, and
This is to stop the movement of 2.

Then, as shown in FIG. 2, the steering handle 15
The central processing unit 1 controls the expansion and contraction of the actuator 12 so that the rotation center 0 of the agricultural tractor due to rotation becomes the rotation center of a working machine such as a rotary tiller.
The controller in 3 is set.

(F) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

First, conventional agricultural tractor working machines are equipped with technology to maintain horizontal or set inclination angles for left and right inclinations, but it is difficult to adjust the inclination angle between the two in plan view. was impossible. Therefore, if an agricultural tractor with a working implement attached tries to accompany it along a curved ridge or corner of a field, even if the agricultural tractor's turning radius is small, the turning radius of the working implement attached to the rear of the agricultural tractor will be affected. As the radius becomes larger, the implement swings a lot and moves in parallel, scratching the soil and moving around.

Since this soil collects at the edge of the ridge, the operator had to manually correct the uneven distribution of the soil after completing the work.However, with the structure of the present invention, the working machine can be placed at the center of rotation of the agricultural tractor. Since the machine rotates around approximately the same position as the machine, the work machine does not rotate in a scratching state, and the problem of uneven distribution of soil can be solved.

Second, compared to the conventional configuration that could only work in straight lines, it is possible to plow curved areas on deformed land more freely, and the leveling condition after finishing is also better.

Thirdly, in the case of the present invention, since the traveling locus caused by the steering of the machine body and the direction of the reaction force of the driving force of the working machine match, the running becomes stable and the straightness improves.

[Brief explanation of the drawing]

Fig. 1 is an overall plan view of the agricultural tractor of the present invention, Fig. 2 is a plan view showing the state of the agricultural tractor when turning, Fig. 3 is a side view of the vicinity of the steering gear box, and Fig. 4 is a plan view as well. FIG. 5 is a control block diagram. 1... Pitman arm 2... Steering angle detector 9... Rotary tilling device 11... Lower link 12... Actuator R... Radius of curvature

Claims (1)

[Claims] An actuator is installed between the agricultural tractor and the work equipment attached to it, which allows the center bending adjustment between the two in plan view, and a detector is installed to detect the steering angle of the steering handle. 1. A working equipment mounting device for an agricultural tractor, characterized in that the working equipment is configured to rotate in a turning trajectory substantially the same as that of the agricultural tractor based on a detected value of an angle detector.