JP3075616B2 - Tractor work equipment coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor working machine connecting device in which a working machine is detachably mounted on a hitch frame connected to 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 work machine is automatically attached to and detached from the hitch frame. , Connected to the control device attached to the tractor by a transmission or power transmission wire, with a socket interposed in the middle of the tractor to be interrupted manually when the work equipment is attached or detached, or a socket is attached to the connection part of the work equipment Installed by
It is already known that time is worn by human power and automatically performed only when leaving .

[0003]

Among the above known devices, the one in which the socket of the electric wire is intermittently operated by human power is troublesome, but the socket may be damaged unless the intermittent operation is forgotten. Absent. Also, when the socket is attached to the work equipment connection part, it can be operated manually by human
It is troublesome, but it can be done automatically when leaving, which is convenient . I
However, the socket was sometimes damaged by an impact when attaching or detaching a heavy working machine .

[0004]

According to the present invention, a work machine is detachably connected to a hitch frame 5 connected to a rear portion of the tractor main machine via a top link 3 and a lower link 4. The front and rear portions of the hitch frame 5 near the top hook 26.
The bracket 31 that is movable in the direction fitted, while Ru attaching the front socket 30 for electrical wiring to the bracket 31,
The working machine fitted with a rear socket <br/> preparative 37 joined to the front socket 30, upon detachment to the unit of the working machine,
The pre SL front socket 30, the operating lever 25 for operating the locking member which is attached to the lower coupling portion of the hitch frame 5, the rear socket 37 front <br/> socket 30 in conjunction with the locking member
That when the locking operation or releasing operation of the working machine to the locking member of the lower coupling portion, damaging the intermittent socket both provided in this unit side and the working machine side by which tandem configured to intermittently to Instead , the above-mentioned problem was solved by enabling automatic and smooth intermittent operation.

[0005]

[Function] When attaching a work machine to the hitch frame , first,
To the hitch frame, and then operate the operating lever to lock
When the locking member is operated, the bracket is
As it moves backward in conjunction with the operation of the front socket,
Move rearward with the bracket to the rear socket.
Connected dynamically . Also, remove the work equipment from the hitch frame.
Release the lock member with the operation lever
And the front socket shares with the bracket
Move forward and out of the rear socket, then
Remove the implement from the hitch frame . At that time, since the front socket <br/> DOO is Intermittent the rear socket soft touch, self
Impact is reduced while being dynamically attached and detached
They will not be damaged.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a transmission case provided on a tractor main body, and a top link bracket 2 attached to a lower portion and an upper portion thereof has a top link. The hitch frame 5 is connected via the lower link 3 and the left and right lower links 4, the lift arm 6 is connected to the lower link 4 via a lift rod, and the rear of the PTO shaft 7 is supported by the hitch frame 5. The yoke joint 8 and a clutch are interlockingly connected to an input shaft of a rotary tiller 10 serving as a working machine via a clutch.

The rotary tiller 10 has a rotary main cover 11 which covers an upper surface of a rotation trajectory of a tilling claw mounted on a tilling shaft, and has a rear end fixed to a horizontal frame 12 and has 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 the upper portion of a rear cover 15 is pivotally mounted on the rear surface of the horizontal frame 12 so as to be vertically rotatable. Is connected to the middle part of the horizontal frame 12 with the electric motor 16 pivotally supported by the top mast 14, and when the electric motor 16 is rotated in the forward and reverse directions, the elevating cylinder 17 expands and contracts. The rotating rails 13 and 13 and the horizontal frame 12 integrally rotate back and forth, whereby the rear cover 15 moves up and down in an oblique direction. In addition, a lower pin 20 is attached to the connection plate 18 protruding forward from both sides of the rotary tiller 10.
Projecting a and the groove of the lower hook 21, 21 fixed to opposite sides the lower end of the hitch frame 5 the Roapin 20 is fitted at the time of connection, the locking hook 22 is pivotally mounted to the front the lower hook 21, at its intermediate portion An operation lever 25 is fixed to an upper portion of the rod portion 23 having a lower end linked thereto.
Is loosely fitted in an L-shaped guide groove 27 as viewed from the side, which is formed in a top hook 26 fixed to the center of the upper end of the hitch frame 5, and an inverted V-shape is formed in a shaft attachment portion of the rod portion 23. A stop spring 28 is mounted.

A bracket 31 having a U-shaped cross section to which a front socket 30 is attached in a fitted state is mounted on a support shaft 29 fixed to the upper rear surface of the hitch frame 5 so as to be rotatable in the front-rear direction. At the same time, the bracket 31 is rotationally urged rearward by a torsion spring 32,
The restricting rod 33 fixed to the rear surface and raised is pressed against the front surface of the operation lever 25. Further, the top mast 14 is welded to the front end of the top mast 14 through a top pin 36 with which the top hook 26 is engaged.
A rear socket 37, which is connected to the front socket 30, is attached to a bracket 34 fixed to a side near the front of the rear socket 37. The rear end of an electric wire 38 of the rear socket 37 is connected to the electric motor 16, front socket 3 0 of the wire 39 is coupled to the battery of the tractor.

The front socket 30 has two poles (+
The two-pins 42, 42 having the connection terminals 41, 41 of (-) and being inserted into the rear socket 37 so as to be able to advance and retreat are urged to project by springs 43, 43 and adhered 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 tilling machine 10 is mounted as a working machine, the bent portion of the lock hook 22 at the lower end of the stop spring 28 has a stopper 47.
In this state, 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 raised from below, and the top hook 26 is hooked on the top pin 36. When the hitch frame 5 is further raised in this hooked state, the rotary tiller 10 rotates forward around the top pin 36, and the lower pin 2, the lower end of the stop spring 28 is pushed by the lower pin 20 and slides down from the stopper 47 , as shown in FIG.
The lock hook 22 is rotated downward to be in a locked state in which the downward groove is fitted to the lower pin 20, and accordingly, the operation lever 25 is lowered and lowered to the lower end of the vertical portion of the guide groove 27, at which time the bracket Since 31 is rotationally urged rearward by the torsion spring 32, the operation lever 25 enters the rearward portion of the guide groove 27,
The operation lever 25 itself is locked, and the front socket 30 is automatically and softly joined to the rear socket 37 by the elastic force of the torsion spring 32 to be in a state where power can be supplied.

When removing the rotary cultivator 10 from the hitch frame 5, the driver extends the hand to the rear while holding the rotary cultivator 10 up, holds the operating lever 25, and pulls forward to pull the front part. Socket 30 is rear socket 3
7 and resists the urging force of the torsion spring 28.
To the front, and in that state, to the position shown by the solid line in FIG.
When the operation lever 25 is pulled up, the stop spring 2
8 rises above the lower pin 20, and when the hand is released, the bent portion at the lower end assumes a standby position on the lower pin 20. When the rotary tiller 10 is lowered in this state, the lower portion is grounded. The lower pin 20 comes out of the groove of the lower hook 21. As described above, the operation of attaching and detaching the work machine is performed. During the work, for example, during the scraping work, the rear wheel of the tractor and the rotary cultivator 10 splash up a large amount of muddy water . However, these muds, do not adhere to the two sockets 30, 37.

[0012]

According to the present invention, a working machine is detachably connected to a hitch frame 5 connected to a rear portion of the tractor main body via a top link 3 and a lower link 4. while wearing the bracket 31 that is movable in the longitudinal direction in the vicinity of the hook 26, Ru attach the front socket 30 for electrical wiring to the bracket 31, said working machine
Attach the rear socket 37 to be joined to the front socket 30
Te, upon detachment to the unit of the working machine, the pre-SL front socket <br/> DOO 30, the operating lever 25 for operating the locking member which is attached to the lower coupling portion of the hitch frame 5, the front socket since 30 is in tandem configured to intermittently to the rear socket 37 in conjunction with the locking member, a working machine with a weight hitch frame 5
When detached , the front and rear sockets 30 and 37 are
5 can be attached and detached almost simultaneously and automatically
Te and Rutotomoni its detachable <br/> eliminates the hassle of detachable by human power obtained perform in soft touch, the impact as in the prior art that these are not damaged. Further, since the sockets 30 and 37 are disposed above the hitch frame 5, there is no possibility that muddy soil, muddy water, etc., which the wheels or the working machine jumps up, adhere to the sockets 30 and 37, resulting in poor current supply.

[Brief description of the drawings]

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

FIG. 2 is a side view of a state where the working machines are connected.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view showing a state where the operation lever is released in the same manner.

FIG. 5 is a plan view of the same.

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

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

[Explanation of symbols]

Reference Signs List 5 hitch frame 10 rotary tiller 12 horizontal frame 14 top mast 15 rear cover 17 elevating cylinder 20 lower pin 21 lower hook 22 lock hook 25 operating lever 26 top hook 30 front socket 32 torsion spring 33 regulating rod 35 top pin bracket 37 rear socket

Claims (1)

(57) [Claims] 1. A work machine is detachably connected to a hitch frame 5 connected to a rear portion of the tractor main body via a top link 3 and a lower link 4, and is provided near a top hook 26 of the hitch frame 5. the mounting bracket 31 that is movable in the longitudinal direction, while the Ru mounted front Seo <br/> socket 30 for electrical wiring to the bracket 31, the working machine to said front socket <br/> DOO 30 wearing the rear socket 37 of joining, the work
Upon attached to and detached from the work machine of the present machine, the previous SL front socket 30,
The operating lever 25 for operating the locking member which is attached to the lower coupling portion of the hitch frame 5, characterized in that the front socket 30 is cooperative configured <br/> to intermittently to the rear socket 37 in conjunction with the locking member Tractor working machine coupling device.