JPH05153804A - Device for connecting working machine in tractor - Google Patents

Abstract

PURPOSE:To connect and disconnect sockets interlocking with locking or releasing operation of a locking member without damaging the sockets by connecting and disconnecting the mutual sockets with an operating lever for operating the locking member. CONSTITUTION:A front socket 30 is attached through a bracket 31 to a pitch frame 5 in the rear of the tractor. A rear socket 37 is attached through a bracket 34 to a rotary tiller 10. The lower end of a rod 23 is linked to a locking hook 22 pivoted on a lower hook 21 and an operating lever 25 is fixed on the upper part of the rod. Thereby, the sockets are connected and disconnected following the operation of the locking member with the operating lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machine connecting device for a tractor in which a work machine is removably mounted on a hitch frame mounted on a rear portion of a tractor via a top link and a lower link.

[0002]

2. Description of the Related Art Conventionally, a hitch frame is connected to a rear portion of a tractor by a top link and a lower link, and a working machine is automatically attached to and detached from the hitch frame. , Connect to the control equipment attached to the tractor with electric wires for transmission or power transmission, and insert a socket in the middle of the tractor to manually connect or disconnect the work machine, or connect the socket to the connection part of the work machine to connect or disconnect. Those that have been done are already known.

[0003]

Among the above-mentioned known devices, the one in which the socket of the electric wire is intermittently connected by human power is as follows.
Although the operation is troublesome, the socket will not be damaged unless you forget the intermittent operation. In addition, it is convenient to connect the working machine to the socket with the socket to automatically connect and disconnect the socket, but the socket may be damaged by the impact during the disconnection.

[0004]

According to the present invention, a working machine is detachably connected to a hitch frame which is connected to a rear portion of a tractor via a top link and a lower link. A movable bracket is attached in the vicinity, one socket for electric wiring is attached to the bracket, the other socket joined to the socket is attached to a working machine, and one of the sockets is attached to the hitch frame 5. The operation lever for operating the lock member of the lower connecting portion is connected to the other socket so that one socket is intermittently interlocked with the lock member, so that the lock member of the lower connecting portion can be locked or released. When doing so, the above-mentioned problem was solved by making it possible to automatically connect and disconnect without damaging the socket.

[0005]

[Operation] When the working machine is removed from the hitch frame, when the lock member is released by the lock lever, one socket moves together with the bracket and separates from the other socket, and then the working machine is hitched. Remove from the frame. Further, when the working machine is attached to the hitch frame, first, when the working machine is connected to the hitch frame and then the operating lever is operated to lock the lock member, the bracket is moved backward in conjunction with the operation of the operating lever. As it moves, one socket is automatically connected to the other socket.
At that time, since one socket is connected to the other socket by soft touch, it is not damaged.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. 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 4, 4 and the lift arm 6 is connected to the lower link 4 via the lift rod. The PTO shaft 7 has a yoke joint 8 whose rear part is supported by the hitch frame 5 and a clutch. It is interlockingly connected to the input shaft of the rotary cultivator 10 which is a working machine.

The rotary cultivator 10 has a rotary main cover 11 covering the upper surface of the rotary locus of the cultivating claw attached to the cultivating shaft and a rear end fixed to the lateral frame 12 to form an arc shape in a side view. The rotating rails 13 and 13 are fitted to guide rollers on the rotary main cover 11 so as to be rotatable back and forth, and 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 has an upper end. The lower part of the lift cylinder 17 with the electric motor 16 pivotally supported on the top mast 14 is connected to the middle part of the horizontal frame 12, and when the electric motor 16 is rotated in the forward and reverse directions, the lift cylinder 17 expands and contracts. The rotating rails 13, 13 and the horizontal frame 12 integrally rotate forward and backward, whereby the rear cover 15 moves up and down in an oblique direction. Further, the lower plate 20 is attached to the connecting plate 18 that is projected forward from both sides of the rotary cultivator 10.
The lower pin 20 is fitted in the groove of the lower hook 21 fixed to the lower ends of both sides of the hitch frame 5 at the time of connection, and the lock hook 22 has its front part pivotally attached to the lower hook 21 and its lower end at its middle part. An operation lever 25 is fixed to the upper portion of the linked rod portion 23, and the operation lever 25 is L-shaped in a side view formed by drilling a top hook 26 fixed to the center of the upper end of the hitch frame 5. It is loosely fitted in the guide groove 27,
An inverted V-shaped stop spring 28 is attached to the shaft attachment portion of the rod portion 23.

A bracket 31 having a U-shaped cross section, to which a front socket 30 is attached in a fitted state, is rotatably mounted on a spindle 29 fixed to the upper rear surface of the hitch frame 5, and the bracket is also attached. 31 torsion spring 32
The control rod 33, which is urged to rotate rearward by means of, is fixed to the rear surface of the bracket 31 so as to stand up.
Is pressed against the front surface of. In addition, the top mast 14
Top pin 3 with which the top hook 26 is engaged at the front end of the
A rear socket 37 that is joined to the front socket 30 is attached to a bracket 34 that is welded through 6 and fixed to the side surface of the top mast 14 near the front portion. The rear end is connected to the electric motor 16, and the electric wire 39 of the front socket 31 is connected to the battery of the tractor.

The front socket 30 has two poles (+
The two-pole pins 42 and 42, which have the connection terminals 41 and 41 of −) and which are inserted through the rear socket 37 so as to be able to move forward and backward, are biased by the springs 43 and 43 so as to project, and adhere to the front surface of the main body 45. The rubber plate 46 prevents muddy water and rainwater from entering the inside.

In the tractor described above, when the rotary cultivator 10 is mounted as a working machine, the lock hook 22 has a stopper 47 at the bent portion at the lower end of the stop spring 28.
The operation lever 25 is at the position shown by the dotted line in FIG. 4, and the front socket 30 rotates forward together with the bracket 31 and is separated from the rear socket 37. .. In this state, the hitch frame 5 is slowly lifted from below to hook the top hook 26 on the top pin 36, and when further lifted in this hooked state, the rotary cultivator 10 rotates forward around the top pin 36 to move the lower pin. Since 20 enters the groove of the lower hook 21, the lower end of the stop spring 28 is pushed by the lower pin 20 and slips off from the stopper 47, and the lock hook 2
2 is rotated downward, and the downward groove thereof is fitted into the lower pin 20 to be in a locked state, and accordingly, the operation lever 25 descends to the lower end of the vertical portion of the guide groove 27,
At that time, since the bracket 31 is urged to rotate rearward by the torsion spring 32, the operating lever 25 enters the rearward portion of the guide groove 27, and the operating lever 25
When the front socket 30 is locked itself, the front socket 30 is automatically and softly joined to the rear socket 37 by the elastic force of the torsion spring 32 so that the electric current can be supplied.

When the rotary cultivator 10 is detached from the hitch frame 5, the driver extends the hand to the rear while holding the operation lever 25 in the state where the rotary cultivator 10 is raised, and pulls it to the front. Socket 30 is rear socket 3
When the stop spring 28 is lifted above the lower pin 20 and lifted up to the position shown by the solid line in FIG. When the rotary cultivator 10 is lowered in that state, the lower pin 20 comes out from the groove of the lower hook 21 when the rotary cultivator 10 is lowered. Further, during work, for example, during scraping work, the rear wheel of the tractor and the rotary tiller 10 splash a large amount of muddy water, but the muddy water does not adhere to the sockets 30 and 37.

[0012]

According to the present invention, the working machine is detachably connected to the hitch frame 5 connected to the rear portion of the tractor via the top link 3 and the lower link 4, and the hitch frame 5
A movable bracket 31 is mounted in the vicinity of the top hook, and one socket 30 for electric wiring is attached to the bracket 31, and the other socket 37 that is joined to the socket 30 is attached to the working machine. Socket 30
Is connected to an operating lever 25 for operating a lock member attached to the lower connecting portion of the hitch frame 5 so that one socket 30 is interlocked with the lock member and intermittently connected to the other socket 37. When connected to the hitch frame 5, the front and rear sockets 30 and 37 can be automatically and almost simultaneously connected via the operation lever 25, and the connection can be made by soft touch and attached to the working machine connecting means. It will not be damaged by impact like objects. Further, since the sockets 30 and 37 are arranged on the upper portion of the hitch frame 5, there is no possibility that the mud or muddy water splashed by the wheel or the working machine adheres to the sockets 30 and 37 to cause the electric conduction failure.

[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 state in which working machines are connected.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view showing a state in which the operating lever is operated to be released.

FIG. 5 is a plan view of the same.

FIG. 6 is a front view of a connected state.

FIG. 7 is a cross-sectional view of front and rear sockets.

[Explanation of symbols]

 5 Hitch Frame 10 Rotary Tiller 12 Horizontal Frame 15 Rear Cover 17 Lifting Cylinder 20 Lower Pin 25 Operating Lever 30 Front Socket 32 Torsion Spring 33 Control Rod 35 Top Pin Bracket 37 Rear Socket

Claims (1)

[Claims] 1. A work machine is detachably connected to a hitch frame 5 connected to a rear portion of a tractor through a top link 3 and a lower link 4, and the work machine is moved to a vicinity of a top hook 26 of the hitch frame 5. Attach the possible bracket 31,
One socket 30 for electric wiring was attached to the bracket 31, the other socket 37 joined to the socket 30 was attached to the working machine, and the one socket 30 was attached to the lower connecting portion of the hitch frame 5. A working machine connecting device for a tractor, wherein one socket 30 is linked to an operating lever 25 for operating a lock member so as to be intermittently connected to the other socket 37 in conjunction with the lock member.