JPH05192007A - Device for transmitting amount of rear cover moved in rotary tiller of tractor - Google Patents

Abstract

PURPOSE:To precisely transmit an amount of a rear cover moved to a detector by linking a raising and dropping drive arm to a means of moving the rear cover or its pivot part with a mechanical means. CONSTITUTION:When an electrically-driven motor is normally or reversely rotated and a rise and fall cylinder is expanded or contracted, a rotary rail is longitudinally revolved, a rear cover is raised and dropped with the revolution and a rod is simultaneously moved forward and backward so that a passive arm 43 is rotated by a raising and dropping drive arm 39. Thereby, the height of the rear cover is discovered by a height detector 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear cover moving amount transmission device for a rotary cultivator of a tractor in which a hitch frame is connected to a rear portion by a top link and a lower link, and a rotary cultivator is detachably attached to the hitch frame. ..

[0002]

2. Description of the Related Art Conventionally, a hitch frame is connected to a rear portion by a top link and a lower link, a front upper portion of a rotary cultivator is hooked and lifted by a lifting portion of the hitch frame, and the hook portion is rotated to rotate the lower portion. And the rear cover pivot part of the rotary cultivator is rotated around the cultivating shaft to move the rear cover diagonally up and down together with the pivot shaft, and the amount of movement is transmitted to a detector attached to the tractor for detection. In such a configuration, a cylinder for rotating the pivot portion of the rear cover, or a means for supporting the mast and the rear cover is provided with a stroke sensor for electrically detecting the displacement amount, and the detection result is used as an electric signal for electric wire. The electric wire is transmitted to the detector of the tractor main body, and the electric wire can be connected and disconnected in the vicinity of the hitch frame through an electric socket.

[0003]

In the rear cover movement amount transmission device of the rotary cultivator of the known tractor, the method of transmitting the movement amount of the rear cover pivot portion to the detector of the main body by a series of wires is a rotary cultivator. It is difficult to attach / detach, and the method of connecting / disconnecting the electric wire by the socket can attach / detach the rotary cultivator to / from the hitch frame, but the driver must get off and attach / detach each time the attach / detach operation is performed. Therefore, it is extremely troublesome, and since the detection signal of the stroke sensor is extremely low voltage,
When the connection of the socket was loosened even a little, it became impossible to send.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a hitch frame is connected to a rear portion by a top link and a lower link, and a rotary cultivator is pivoted on the hitch frame around an upper engaging portion to attach and detach a lower portion. In a tractor in which the movement amount of the rear cover pivot portion of the rotary cultivator is transmitted to the tractor, and the movement amount transmission means is connected by the engagement / disengagement means in the vicinity of the hitch frame, the engagement / disengagement means moves up and down with a passive arm. And a rear cover,
Alternatively, the aforementioned problem is solved by interlockingly connecting the means for moving the pivotal support portion without interposing the stroke sensor.

[0005]

[Operation] When the working machine is mounted on the hitch frame, a hook serving as a lock receiving portion of the hitch frame is hooked on the upper engaging pin of the working machine and lifted by the lift device of the tractor, the lower connecting section is automatically Be connected. At that time, the drive arm, which is connected to the rear cover moving cylinder or the front end of the wire whose rear end is connected to the rear cover, is transmissibly superimposed on the passive arm mounted to the hitch frame. When the rear cover is moved diagonally up and down, the rear cover or the cylinder for raising and lowering it pushes and pulls the wire connected to it, whereby the drive arm rotates, and the passive arm rotates by the drive arm. As a result, the amount of movement of the rear cover is transmitted to the tractor body or the detector mounted on the hitch frame via the wire.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. Reference numeral 1 is a tractor mission case, and a top link 3 and a lower link are attached to a top link bracket 2 attached to a lower portion and an upper portion thereof. The hitch frame 5 is connected via the lift arm 6, the lift arm 6 is connected to the lower link 4 via the lift rod, and the PTO shaft 7 is connected via the yoke joint 8 whose front portion is supported by the hitch frame 5 and the clutch. Is operatively connected to an input shaft of a rotary cultivator 10.

The rotary cultivator 10 has a rotary cover 1 on the upper surface of the rotation path of the cultivating claws mounted on the cultivating shaft.
1, the rear ends of which are fixed to the horizontal frame 12 and which are arcuate in a side view and which are formed into arcuate shapes are fitted to guide rollers on the rotary cover 11 so as to be rotatable back and forth.
An upper portion of a rear cover 15 is pivotally attached to a rear surface of the horizontal frame 12 so as to be vertically rotatable, and an upper end of the rear cover 15 is pivotally supported by the top mast 14. A lower portion of a lifting cylinder 17 with an electric motor 16 is connected to an intermediate portion of the horizontal frame 12. When the electric motor 16 is rotated in the forward and reverse directions, the elevating cylinder 17 expands and contracts, so that the rotating rails 13 and 13 and the horizontal frame 12 integrally rotate forward and backward, whereby the rear cover 15 is obliquely moved. Go up and down.

A bracket 18 which is erected on the rear surface of the rear cover 15 is attached to the rear end of the bending link 20 for the rod 2.
1 is a pipe frame 24 that is rotatably connected and that extends laterally from the side surface of the gear case 22 having the input shaft.
A plate 24a is projectingly provided on the front of the plate 24a, and a middle portion of a drive arm 25 serving as a drive member is rotatably supported by a bracket 23 screwed to the plate 24a.
At the lower end of the bending link 20, at the pipe frame 24
It is connected by a wire 27 consisting of a push-full wire wound in a loop shape only once, and a strong spring 28 for urging the wire 27 to rotate in the extending direction is attached to the upper end, so that the rear cover 15 can be changed by changing the working depth. When is rotated up and down, the drive arm 25 is accurately rotated in the forward and backward directions.

The lower end connecting member of the inverted U-shaped hitch frame 5 has a trough-shaped bracket 3 fixed to the center thereof.
No. 0 supports the yoke joint 8, and an L-shaped mounting plate 34 in a plan view is fixed to one side of the bracket 30, and an inner surface of the mounting plate 34 is a plowing depth detector including a potentiometer. 32 is attached to the shaft 32a so that an intermediate part of the passive arm 33 whose upper part is bent in the lateral direction is integrally rotated, and the lower part is attached to the spring 28.
It is pulled by a weaker spring 35 to come into contact with the stopper 35a on the lower front side, and is rotatably biased so that the upper bent portion is brought into pressure contact with the upper portion of the drive arm 25. Since it pivots about an axis parallel to the arm 25, when the hook on the upper portion of the hitch frame 5 is hooked on the front pin of the top mast 14 and lifted to connect the lower connecting portion, the rear cover 15 is raised most. In this state (the member that rotates with respect to the rotary cultivator itself is rotated most forward), the drive arm 25 is pressed against the bent portion of the passive arm 33 as shown in FIG.
When the rear cover 15 rotates up and down due to a change in the plowing depth during the plowing work, the operation causes the bending link 20 and the rod 21 to rotate.
And rotating the drive arm 25 via the wire 27,
Following this, the passive arm 33 is rotated. Further, when the pivotal support portion of the rear cover 15 is pivoted rearward and lowered, the pivotal support portion is separated from the drive arm 25 rearward, but the wire 27 only extends to drive the drive arm 25.
The posture of the working depth detector 32 does not change, and
The rotation amount of 5 is accurately detected.

3 to 5 show the vertical movement amount of the rear cover 15,
That is, it shows a device for detecting the supporting height, in which a receiving member 36 is erected on the horizontal frame 14 and a front portion is provided on a plate 37 which is integral with the front surface of the pipe frame 24 extending from the gear case 22 to the other side. A bracket 38 bent outward is screwed, a lower part of a raising / lowering drive arm 39 is pivotally attached to the bracket 38 by a fulcrum pin 40, and an upper end of the bracket 36 is attached to the receiver 36.
It is interlockingly connected through a. Further, a height detector 41 corresponding to the lifting drive arm 39 is attached to the inner side surface of an L-shaped attachment plate 42 fixed to the other side surface of the bracket 30, and a height detector including a potentiometer is detected. The other passive arm 43, which is attached to the shaft of the container 41 and has an inverted L-shape when viewed from the front, is urged by the spring 45 to rotate until its upper portion comes into contact with the stopper 46, and outwardly of the lower end. In the portion that is bent toward the substantially horizontal position, the raising / lowering drive arm 39 is connected to the working machine in a connected state.
When the electric motor 16 rotates forward and backward and the elevating cylinder 17 expands and contracts, the rotating rails 13 and 13 rotate back and forth, and the rear cover 15 moves up and down accordingly. At the same time, since the rod 36a moves back and forth, the elevating drive arm 39 moves the passive arm 43
The height detector 41 so that the rear cover 1
The height of 5 is detected, and this detection signal is electrically transmitted to the control device of the machine by a code. Also, when the rotary cultivator is attached to or detached from the hitch frame 5, the lifting drive arm 39 is used.
Moves toward and away from the passive arm 43. Further, when the movement amount of the rear cover is transmitted to a detector mounted on the rear portion of the tractor or to a solenoid valve which is inserted in the lift hydraulic circuit and serves as a detector, the operation of the passive arm 43 is performed by a machine such as a rod or a wire. It is transmitted by means of automatic transmission.

The front of the front end of the bracket 38 is bent outward (it is preferable to incline the front so as to be about 70 degrees with respect to the front-rear direction). Socket 5 connected to electrical wiring 48
0 is screwed so that the L-shaped plate 51 (the angle of the front surface with respect to the front-rear direction is approximately 70 degrees) is projected inward on the inner surface of the rectangular tubular portion 5a at the lower right side when viewed from the front of the hitch frame 5. A socket 52 corresponding to the socket 50 is screwed to the protruding portion of the socket 52. A ring 53 made of a cushioning material such as rubber is adhered to the rear surface of the plate body, and the socket 52 is attached to the inside thereof. , Two-pole (+-) connection terminals 55, 55 to which the electric wiring 54 leading to the battery of this machine is connected, and are inserted into the front portion of the box-shaped body of the socket 50 so as to be able to move forward and backward.
The pole pins 56 and 56 are biased by the springs 57 and 57 so as to project. When the sockets 50 and 52 are connected to each other, the ring 53 prevents rainwater from entering the inside.

[0012]

According to the present invention, the hitch frame 5 is connected to the rear portion by the top link 3 and the lower link 4, and the rotary cultivator 10 is rotated around the upper engaging portion of the hitch frame 5 to attach and detach the lower portion. Then, the moving amount of the rear cover pivot portion of the rotary cultivator 10 is transmitted to the tractor, and in the tractor in which the moving amount transmitting means is connected by the engaging / disengaging means in the vicinity of the hitch frame 5, the engaging / disengaging means is passive. The arm 43 and the lifting drive arm 39 are provided, and the lifting drive arm 39
When the rotary cultivator 10 is attached to or detached from the hitch frame 5, since the rear cover 15 or a means for moving the pivotal support thereof is interlocked and linked without using a stroke sensor,
The driver can automatically connect the raising / lowering drive arm 39 mounted on the front part of the rotary cultivator 10 and the passive arm 43 attached to the hitch frame 5 while the driver is on the vehicle. Further, the stroke sensor detects the ascending / descending amount of the rear cover 15, and the detection result does not become untransmittable at the interrupting portion unlike the electrical transmission method, and can always be accurately transmitted.

[Brief description of drawings]

FIG. 1 is a side view of a tractor having a rotary cultivator connected to a rear portion thereof.

FIG. 2 is a side view showing a connected state of a rear cover rotation amount transmission device.

FIG. 3 is a side view of the rear cover movement amount transmission device in a rear cover most raised state.

FIG. 4 is a side view of the uppermost descent state.

FIG. 5 is a side view of the rotary cultivator immediately before connecting the rotary cultivator to the hitch frame.

FIG. 6 is a plan view showing a connection state of each connecting portion.

FIG. 7 is a plan view showing the above-mentioned separated state.

FIG. 8 is a front view of the same.

FIG. 9 is a cross-sectional view of front and rear sockets.

FIG. 10 is a side view of an example in which a working portion operation amount is transmitted to a solenoid valve or a detector mounted on a tractor body.

[Explanation of symbols]

 5 Hitch Frame 10 Rotary Tiller 11 Rotary Cover 12 Horizontal Frame 15 Rear Cover 17 Rear Cylinder 17 Lifting Cylinder 25 Drive Arm 27 Wire 28 Spring 32 Culturing Depth Detector 33 Passive Arm 35 Spring 39 Lifting Drive Arm 41 Detector 43 Passive Arm 50 Socket 52 Socket

[Procedure amendment]

[Submission date] December 31, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a side view of a tractor having a rotary cultivator connected to a rear portion thereof.

FIG. 2 is a side view showing a connected state of a rear cover rotation amount transmission device.

FIG. 3 is a side view of the rear cover movement amount transmission device in a rear cover most raised state.

FIG. 4 is a side view of the uppermost descent state.

FIG. 5 is a side view of the rotary cultivator immediately before connecting the rotary cultivator to the hitch frame.

FIG. 6 is a plan view showing a connection state of each connecting portion.

FIG. 7 is a plan view showing the above-mentioned separated state.

FIG. 8 is a front view of the same.

FIG. 9 is a cross-sectional view of front and rear sockets.

[Explanation of Codes] 5 Hitch Frame 10 Rotary Tiller 11 Rotary Cover 12 Horizontal Frame 15 Rear Cover 17 Lifting Cylinder 25 Drive Arm 27 Wire 28 Spring 32 Working Depth Detector 33 Passive Arm 35 Spring 39 Lifting Drive Arm 41 Detector 43 Passive Arm 50 socket 52 socket

Claims (1)

[Claims] 1. A hitch frame 5 is connected to a rear portion by a top link and a lower link, and a rotary cultivator is attached to the hitch frame by rotating the rotary cultivator around an upper locking portion center to attach and detach the lower part thereof. In a tractor in which the movement amount of the rear cover pivot portion is transmitted to the tractor, and the movement amount transmission means is connected to the hitch frame 5 by the engagement / disengagement means, the engagement / disengagement means is combined with the passive arm 43 and the elevating drive arm 39. And the drive arm 39 for raising and lowering, the rear cover 15,
Alternatively, a rear cover movement amount transmission device in a rotary cultivator of a tractor, characterized in that it is linked to a means for moving its pivotal support portion by mechanical means without interposing a stroke sensor.