JPH10262403A - Tilling device for tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilling device for tractor with which tilling work can be continuously performed by facilitating the removal of weed or waste straw stuck on the rotary of tilling device by rotating the rotary backward through the upward move of tilling device higher than a prescribed value. SOLUTION: A traveling machine body 1 is provided with a rotary type tilling device 3 through an elevating mechanism 2, and a rotary 36a of this tilling device 3 is rotated backward by the upward move of tilling device 3 higher than the prescribed value. In this case, the forward rotation switching operation is preferably performed after the backward rotating operation of this rotary 36a is executed for prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor provided with a rotary tilling device on a traveling body.

[0002]

2. Description of the Related Art Conventionally, a tractor tilling device, which is supported at the rear of a traveling body via a lifting mechanism so as to be able to move up and down, performs a tilling operation by rotating a rotary forward with the forward movement of the body. At the time of turning, a turning operation in the left-right direction is performed with the tillage device raised.

[0003]

In the above-described tilling work, the winding of long weeds and straw chips easily occurs on the rotary. When this wrapping occurs, there is a problem that the soil is turned into a large lumps together with the adhesion of the mud, and the tilling claws reverse the cultivated soil, break the soil, and hinder the uniformity to make it difficult to cultivate a good tilling. Therefore, there is a problem that the operation is inefficient because the machine must be stopped and the operation of removing the attached material must be performed in order to remove the attached material.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, a tractor tilling device of the present invention comprises a traveling tractor 1 provided with a rotary tilling device 3 via a lifting mechanism 2 on a traveling body 1. Rotary 36a of tillage device 3,
The tilling device 3 is configured to rotate in the reverse direction when the tilling device 3 rises by a predetermined value or more.

[0005] Further, it is characterized in that after performing a reverse rotation operation of the rotary 36a for a predetermined time, a forward rotation switching operation is performed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a tractor (traveling body) which is mounted on a rear part of a body having a front wheel and a rear wheel via a lifting mechanism 2 composed of a three-point link type hitch and a rotary tilling device 3 mounted thereon. It is configured. And the lifting mechanism 2
The hitch 2c is formed at the rear end of the top link 2a and the lower link 2b, and the lower link 2b is lifted up and down by a hydraulic cylinder 20 installed in the body (transmission case frame) 10. To the hydraulic cylinder 20 from the control unit side in the same manner as in the conventional device.
The tilling device 3 is configured to be able to move up and down by expanding and contracting.

On the other hand, the lifting mechanism 2 is operated by controlling the hydraulic cylinder 20 by a tillage depth control device 40 that is operated by a signal from a tillage depth detection sensor 4 described later provided in the tillage device 3. The tilling device 3 is configured to be moved up and down so that the tilling depth is constant. The tillage device 3 is mounted by detachably attaching a work machine frame (transmission frame body) 30 and a top mast 31 integrally formed with the work machine frame 30 to the hitch portion 2c.
In this mounted state, the input is transmitted from the transmission shaft 11 with the universal joint so as to be rotatable between forward and reverse.

A tilling portion (rotary) 36a composed of a rotary shaft 36 on which a number of tilling claws 35 are planted is transmitted between a transmission case 32 provided on both sides of the working machine frame 30 and a lower portion of the support frame 33. It is rotatably supported, and its upper and rear sides are covered with a rotary cover 37 and a rear cover 38 which is rotatably attached to the rear of the rotary cover 37 via a support shaft 37a to prevent scattering of tilled soil. I do.

The rear cover 38 has a bracket 39 projecting upward from the rear of the rotary cover 37.
And a non-working posture suspended in the air by a support mechanism 5 interposed therebetween. The tillage device 3 configured as described above includes an angle sensor 70 for detecting a rotation angle at the base of the lift arm 21, an angle setting unit 71 for processing the signal of the angle sensor 70, and a comparison unit as shown in FIG. A control box 73 including a control unit 71a and a calculation unit 72, and a transmission shaft (P
A switching lever 75 of a forward / reverse rotation switching mechanism (not shown) that switches the rotary shaft 36 located below the rotary cover 10 a so as to be rotatable forward and backward inside the transmission frame case 10 via the TO shaft 11. , A rotary speed change mechanism 7 including an electromagnetic clutch 76 and the like for electrically performing the operation. Note that reference numeral 75a in FIG. 1 denotes an operation end of the switching lever 75.

When the tilling device 3 is raised from the tilling working posture to a predetermined height of the non-tilling working posture via the lifting / lowering mechanism 2 by operating the raising / lowering lever 4L provided on the tillage depth control device 40, the rotary shaft is rotated. The rotation of the motor 36 can be automatically switched from the forward rotation state to the reverse rotation state. That is, when the angle sensor 70 reads the amount by which the hydraulic cylinder 20 is extended by the above operation and the lift arm 21 is rotated by a value equal to or more than the value set by the angle setting unit 71, the electromagnetic clutch 76 is controlled via the control box 73. ON
I do.

The switching lever 75 is pushed or pulled to operate in the reverse direction, so that the rotary shaft 36 is reversely rotated for a predetermined time. Thereafter, when a predetermined time has elapsed, the electromagnetic clutch 76 is operated to return the switching lever 75 to the original position, and the rotary shaft 36 is caused to rotate forward again. Therefore, the tilling operation by the tilling device 3 having the above configuration is performed by operating the lifting lever 4L to the ascending side when it is desired to change the direction during the operation.
The tillage device 3 is raised to the non-tillage working posture via the hydraulic cylinder 20, the lift arm 21, and the like.

Next, turning operation is completed by operating the steering wheel, but the rotary shaft 36 of the tilling apparatus 3 reversely rotates for a predetermined time shorter than the average required time for the turning operation in the non-tilling working posture. During this reverse rotation, it is possible to shake off and remove the attached matter such as soil mass, mud, and weeds attached to the tilling claws 35 and the like of the tilling portion 36a by the tilling operation.

After completion of turning, the lifting lever 4L
When the tilling device 3 is moved down to the field by operating the, the rotary shaft 36 has already returned to the normal rotation state, so that the tilling operation is efficiently performed again by the tilling portion 36a with less attachment while reducing the tilling resistance. It can be performed well. In addition, a case cover 9 having a shape shown in FIGS. 3 to 5 is provided at a lower portion of the transmission case 32 of the tillage device 3 to prevent a lower end of the transmission case 32 from being worn or damaged. , So that it can be protected well by integrally covering it.

That is, the case cover 9 is used for the transmission case 3.
The cover main body 91 is attached to the lower part of the lower part 2 so as to be fittable and is fixed to the transmission case 32 through the mounting hole 92 by the mounting screw 93.
Cover piece 95 covering the upper and inner sides of
It is constituted by being integrally formed.

[0015]

According to the present invention, the following effects can be obtained by the configuration described above. When the tilling device is raised through the elevating mechanism to be in the non-tiling work position, the rotary is automatically reverse-rotated by raising the tilling device by a predetermined value or more. The removal can be accelerated by the reverse rotation, and the good tilling work can be continuously performed by swinging down the attached matter and lowering the rotary with less attached matter while rotating forward.

Further, by performing the reverse rotation operation of the rotary for a predetermined time and then performing the forward rotation switching operation, it is possible to efficiently remove the deposits during the turning traveling.

[Brief description of the drawings]

FIG. 1 is a side view showing a tilling operation state of a traveling machine body 1 and a tilling device 3;

FIG. 2 is a circuit diagram of a rotary transmission mechanism.

FIG. 3 is a side view of a transmission case.

FIG. 4 is a sectional view of FIG. 3;

5A is a side view of the case cover, FIG. 5B is a rear view of FIG. 5A, and FIG. 5C is a cross-sectional view taken along line AA of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Traveling body (tractor) 2 Elevating mechanism 3 Tilling device 7 Rotary speed change mechanism 36 Rotary shaft 35a Tillable part (rotary) 70 Angle sensor 73 Control box 75 Switching lever 76 Electromagnetic clutch 4L Elevating lever

Claims (2)

[Claims] In a tractor provided with a rotary tilling device 3 on a traveling body 1 via a lifting mechanism 2, a rotary 36a of the tilling device 3 is reversely rotated by a rise of the tilling device 3 by a predetermined value or more. Tractor tilling device configured as described above. 2. The tractor tilling apparatus according to claim 1, wherein the rotary operation is performed in a reverse direction after a predetermined period of time.