JPH03277204A - Operation hitch of working machine of tractor - Google Patents

Abstract

PURPOSE:To rapidly connect a working hitch to a link hitch by supporting an output clutch member in such a way that the output clutch member is rotated and moved in the longitudinal direction approximately along a center of the clutch. CONSTITUTION:When a link hitch 4 is made to approach a working hitch 6 and to rise, a hanging pin 18 is scooped by a seat 19 to raise the working hitch 6. The working hitch 6 is rotated forward around the hanging pin 18 by weight of a working machine 5 and a lower connecting pin 21 is engaged with a front socket 22. Simultaneously, an input clutch 9 of an input shaft 8 approaches and is engaged with an output clutch 10. When the output clutch 10 pushed by contact of the input clutch 9 is in a state hung by an arm 29 and the center of both the clutches 9 and 10 is made coincident with a spline while the clutch is being longitudinally moved around an arm shaft, the clutch is engaged in the shaft direction and made into a state rotatable in the turning direction. Simultaneously, the connecting pin 21 pushes and opens a hook 24 of the socket 22, is engaged with the hook, fixed through return by a spring 27 and maintains a connecting state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a working pitch for connecting working devices of a tractor working machine.

(Prior Art and Problems to be Solved by the Invention) In a configuration in which a tilling device or other working device is connected to a lifting link consisting of a top link, a lower link, etc. provided on the rear side of the tractor body, this work is difficult. At the same time as connecting the devices, it is necessary to connect the power take-off shaft for transmitting power to the working device. When attempting to set the output clutch body on the tractor body side and the input clutch body on the working equipment side connected to the lifting link to be in an interlocked state, it is difficult to align these clutch bodies, especially when the working equipment When connecting, since this clutch body is not connected, 1
Work equipment may not be connected correctly.

(Means for Solving the Problems) The present invention provides a link hitch 4 that is attached between the tips of a top link 2 and a lower link 3 that are movable up and down with respect to a vehicle body 1, and a work hitch that is integrated in a work machine body 5. An input clutch body 9 receives the upper part of the input clutch body 6 and is detachably provided by swinging the lower part back and forth, and is rotated by the power take-off shaft 7 on the vehicle body 1 side to rotate the input shaft 8 on the work machine side.
The axis of the output clutch body 10 that turns on and off the power by engaging and disengaging in the axial direction is the axis of the clutch 11 consisting of the output clutch body 10 and the input clutch body 9, which rotates in the front-back direction along f. The working hitch of a tractor working machine is constructed such that it is supported as follows.

(Operation and Effect of the Invention) A top link 2 and a lower link 3 are provided at the rear of the tractor body 1.
The link hitch 4 can be raised and lowered freely, and while operating the tractor body 1, approach the front of the work hitch 6 of the work machine 5, receive the upper part of the work hitch 6 with the link hitch 4, and move the lower link 3 to the vehicle body. When raised by the lift arm on the first side, the lower part of the work hitch 6 swings closer to the lower part of the link hitch 4, and becomes ready for connection. At this time, the output clutch body 10 on the side of the link hitch 4 and the input clutch body 9 on the side of the working pitch 6 are mechanically opposed and engaged in an interlocking state. These output clutch bodies 10 include a clutch 11
Because it is supported so that it can rotate in the front-rear direction along the axis of the , since the axial center position of the input clutch body 9 does not change significantly, the clutch 11 is easily engaged;
Therefore, the work hitch 6 can be quickly connected to the link hitch 4.

(Example) Rotation In FIGS. 1 to 3, the tractor body l is in a four-wheel running mode, and a pair of left and right lower links 3 are raised and lowered by a lift arm 12 provided at the rear upper part of the vehicle body 1. They are connected by a lift rod 13, and the top link 2 is connected to a bracket 14 provided at the rear end of the vehicle body 1 so as to be movable up and down.

15 is a rear wheel, and 16 is a rear axle.

The link hitch 4 is attached to the upper end of the saddle-shaped hitch main body 17.
A catch seat 19 is provided which fits and supports the hanging bin 18 at the upper end of the work hitch 6 on the upper side, and the top link 2 is connected to the front part of the catch seat 19 by a connecting bin 20. Furthermore, sockets 22 are provided on both left and right sides of the lower end of the hitch main body 17, into which the pair of left and right connecting pins 21 at the lower end of the work hitch 6 are fitted, and the lower link 3 is connected to the connecting pins 23 on the outside of the sockets 22. The lower link 3 is raised and lowered by the lift arm 12, and the hitch main body 17 is raised and lowered in parallel to the arms. A hook 24 is provided in each of the left and right sockets 22 so as to be rotatable around the bin 25, and is configured to engage the connecting bin 21 fitted in the socket 22 to prevent it from coming off. A lever 26 is provided on the hook 24, and a spring 27 biases the hook 24 so as to constantly engage the connecting bin 21. Also, the connecting bottle 21 is connected to the socket 2.
2, this hook 24 is pushed open against the spring 27, and when the connecting bottle 21 is completely fitted into the socket 22, the hook 25 automatically moves the connecting bottle 21 by the spring 27. to engage. 28 is mainly Hitachi 17
This is a connecting member that connects the left and right lower ends of the.

The output clutch body 10 is provided at the lower left and right center of the pitch main body 17 by a pair of left and right arms 29 so as to be swingable in the front and rear direction, and the upper end of the arm 29 is attached to a bracket 30 that is integrated with the pitch main body 17. The arm 29 is rotatably supported around an arm shaft 31 in the lateral direction, and an 8-force clutch body 0 is supported at the lower part of the arm 29 so as to be rotatable around a pin 32 in the lateral direction.

As shown in FIG. 2, the arm shaft 31 of this arm 29 is such that the axial center line A of the clutch 11 is relative to the longitudinal rotation arc locus line B of the center line of the output clutch body 10 suspended by this arm 29. ＼Configure it so that it is in a tangential position. Also, a spring 3 is installed between the bottle 32 and the bracket 30.
3 is provided to tension the output clutch body 10 rearward. Further, when the output clutch body 10 is turned sideways, a lock arm 35 is provided which can be rotated left and right by operating a lever 34, and by rotating this lock arm 35 toward the output clutch body 10, it engages with the bin 32, etc. This prevents the output clutch body lO from moving forward and disengaging the clutch 11.

The output clutch body IO is spline-fitted with the human-powered clutch body 9 to transmit power, and is connected to the power output shaft 7 on the vehicle body 1 side and an interlocking shaft 38 having an expansion joint 36, a universal joint 37, etc. They are interlocked and can be moved back and forth by spline fitting.

The work machine 5 is an example of a tilling device, and has connecting bins 21 protruding from both left and right sides of a tilling transmission case 39, and a hanging bin 18 provided in the upper center by a bracket 40.
An input shaft 8 made of a spline shaft is provided on the front side, and a spline shaft portion at the front end of the input shaft 8 serves as an input clutch 9.

When connecting the work machine 5, the work machine 5 is placed on the ground and the tractor body 1 is steered so that the link hitch 4 faces the front of the work hitch 6. With the lift arm 12 lowered so that the seat 19 of the link hitch 4 is slightly lower than the hanging bin 18 of the work hitch 6, when the link hitch 4 is brought close to the work hitch 6 and raised by moving the vehicle body 1 backward, The catch 19 scoops up the hanging bottle 18 and raises the work hitch 6.

When the work hitch 6 is moved upward as the link hitch 4 rises, the work hitch 6 begins to rotate forward around the hanging bin 18 due to the weight of the work machine 5, and the lower connecting bin 21 moves forward. It fits into the socket 22 and is ready for connection.

At the same time, the input clutch 9 of the input shaft 8 approaches and engages with the output clutch 10. The output clutch body 10, which is pushed by the contact of the input clutch body 9, is suspended from the arm 29 and moves back and forth around the arm shaft 31, so that the axes and splines of both clutch bodies 9 and 10 are aligned. Then, they fit together in the axial direction and rotate integrally in the rotational direction, resulting in a suspended state. At this time, the connecting bottle 21 is connected to the socket 2 at the same time.
The two hooks 24 are fitted together while being pushed open, and are locked by the spring 27, thereby maintaining the connected state.

In this way, when the clutch 11 is engaged and connected, the output clutch body 10 is connected to the arm 29. The output clutch body 10 of this clutch 11 swings along the axis of the clutch 11 by swinging around the arm shaft 31 of the clutch 11.
There is little resistance between the input clutch 9 and the input clutch 9, and fast engagement can be maintained.

When removing the work hitch 6, the lock arm 35 is moved out of the swinging range of the output clutch body 10 using the lever 34, and the lever 26 is rotated manually or by remote control to move the hook 24 to the connecting bin. Remove from 21. As a result, the work machine body 5 can be removed by slightly lowering the link hitch 4 and moving the vehicle body 1 forward while removing it from the work hitch 6.

In FIG. 4, the difference from the above example is that the clutch 11 is configured in the form of a dog clutch, and the clutch pawls 41 protrude toward opposite sides to form an output clutch body 10 and an input clutch body 9. However, similarly to the above example, the output clutch body 10 is movable back and forth with respect to the interlocking shaft 38 by spline fitting. Further, the arm shaft 31, which is the fulcrum of the arm 29, is deviated toward the front of the hitch main body 17 and positioned directly above the engagement position of the clutch pawl 41.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view showing a part of the separation position, Fig. 2 is a side view of the part, and Fig. 3 is a side view of the part.
The figure is a partially sectional side view, and FIG. 4 is a partially sectional side view showing another embodiment. (Explanation of symbols) 1 Vehicle body 2 Top link 3 Lower link 4 Link hitch 5 Working machine 6 Working pitch 7 Power take-off shaft 8 Human power shaft 9 Human power clutch body 10 Output clutch body 11 Clutch

Claims (1)

[Claims] A link hitch 4 installed between the tips of a top link 2 and a lower link 3 that are movable up and down relative to the vehicle body 1.
The upper part of the work hitch 6 which is integrated with the work machine body 5 is attached and detached by swinging the lower part back and forth, and the work hitch 6 is rotated by the power take-off shaft 7 on the vehicle body 1 side to receive the input to the work machine side. An input clutch body 9 that rotates the shaft 8 and an output clutch body 10 that turns power on and off by engaging and disengaging the shaft 8.
A work hitch for a tractor working machine, which is supported so as to rotate in the front-rear direction along the axis of a clutch 11 made up of an output clutch body 10 and an input clutch body 9.