JPH03143302A - Device for attaching working machine - Google Patents

Abstract

PURPOSE:To simply and readily carry out coupling of three point link and release of coupling thereof by providing an engaging projection for retaining a hook member in coupling state, state where coupling is released and waiting state to hitch pin in a lock member. CONSTITUTION:A hook member 12 and lock member 14 are pivoted in cam contact on the side face of a fitting plate 7 and a spring 16 is stretched and laid between the lock member and hook member. Engaging projections 14a and 14b for retaining the hook member in coupling state, state where the coupling is released and waiting state to a hitch pin are provided in the lock member.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a work implement mounting device that automatically attaches a work implement to a three-point linkage mechanism of a tractor.

[Conventional technology]

Conventionally, a working machine was attached to a three-point linkage mechanism of a tractor via an automatic coupling mechanism, for example,
It is known from the publication No. 2-40088.

In this prior art, a notch is provided at the tips of the left and right lower links of the tractor into which the connecting pin of the work equipment can be fitted and removed, and the connecting pin is inserted into the lower link near this notch. A plate is pivoted to rotate between an engaged state in which it is fitted and an open state in which the connecting pin can be engaged and removed from the notch, and the plate is engaged with a lower link near the plate from the open state. A lock plate is provided that forms a ratchet part between the plate and the lock plate, which rotates and locks in the mated state.Two springs are stretched on the lock plate 1 for the ratchet part. There is.

When the work equipment is attached to the three-point linkage mechanism, only the lower link is automatically connected, but to release the connection, the lock plate must be rotated using the release handle while removing the ratchet part. , therefore, the worker is 1
~I get off the Rakuta and operate it. Further, in this prior art, the top links are connected manually by a separate worker.

[Problem to be solved by the invention]

In the prior art described above, when connecting or disconnecting the three-point link of the tractor and the work equipment, it is necessary to operate the lock play 1~ with human power to release the ratchet. I had to get out of the tractor.

(2) Since it has a ratchet part, its structure is complicated, and it is necessary to rotate the plate at the same time as releasing the ratchet, making the operation cumbersome.

■Since the top link was connected and disconnected manually, it was not possible to automatically connect and disconnect the entire 3-point link.

There were other issues that needed to be resolved.

The present invention has been made to solve the above problems.

[Failure to solve the problem]

In order to achieve the above object, the present invention has been developed.
In a work machine mounting device in which a work machine is mounted on a point link 1111I via an automatic connection fi mechanism, the automatic connection mechanism is provided with a hanger hook at the center of the upper part, and on both left and right sides of the lower part of the hanger hook. A fitting plate having a fitting hole that can be fitted and removed by moving back and forth with a hitch pin of a work machine, and a hook member and a locking member that are pivoted so as to make cam contact with the side surface of this fitting plate. , an elastic member stretched between the locking member and the hook member is provided, and the locking member is locked in an engaged state where the hook member engages with the hitch pin, and the hitch pin is in the fitting hole. The device is characterized in that it is configured to be locked in a position where it can be detached from the main body and a position where it is in a standby state.

[For production]

With the above configuration, the top link of the three-point linkage mechanism and the left and right lower links can be automatically connected and disconnected. Further, the lower link becomes automatically connectable when the link is disconnected, and the operator can automatically connect and disconnect the link while riding on the tractor.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 denotes a tractor, and a three-point link mechanism 4 consisting of a top link 2 and left and right lower links 3 is provided at the rear of the tractor. A hanger hook 6 provided at the upper end of the auto hitch arm 5 and left and right fitting plates 7.7 are connected to the three-point linkage mechanism 4 in advance via a connecting pin 38 or the like.

A top mast 9 provided at the front of the rotary tiller 8 and a hitch pin 1010 are provided on the hanger hook 6 and the fitting plate 7.7 of the auto hitch arm 5 so as to connect and disconnect them, respectively. There is. The fitting grates 7 and 7 are connected and reinforced by a connecting rod 7a.

A fitting hole 11 is formed in the fitting plate 7, as shown in detail in FIGS. A hook member 12 is pivotally supported. The hook member 12 includes
an engagement hole 12a that engages with the hit pin 10 in a state where the hit pin 10 is fitted into the fitting hole 11 and maintains the connected state;
When the hit pin 10 is fitted into the fitting hole 11, a guide portion 12b contacts the circumferential surface of the hit pin 10 and rotates the footer member 12, and a sliding portion makes sliding contact (cam contact) with a lock member 14, which will be described later. 12C. A locking member 14 is pivotally supported by a pivot 15 on the fitting plate 7 in close proximity to the hooking member 12, and is in cam contact with the hooking member 12.

This locking member 14 is such that the hook member 12 is connected to the hit pin 1.
0 is in the connected state, and when this lock is released, the engagement with the hitch pin 10 is released and the hitch pin 10 can be removed from the fitting hole 11, and the hitch pin 10 is not fitted. This is to put the connector in a standby state where it fits into the mating hole 11. Therefore, the engaging protrusion 1 makes cam contact with the hook member 12 and holds the hook member 12 in a connected state, a disconnected state, and a standby state with respect to the hit pin 10.
4a and 14b. Further, a spring 16 is stretched between the hook member 12 and the lock member 14 in order to hold the hook member 12 and the lock member 14 in the above-mentioned circumferential position, in a disconnected state, and in a standby state for connection.

The double-ended locking members 14.14 are connected by a connecting member 17, and a release lever 18 provided so as to protrude upward from the center of the connecting member 17 is supported by a support ring 19 so as to be vertically movable. The release lever 18 is
It is located in a position where a worker sitting in the front seat can reach back and operate the machine.

The hit pin 10 is provided with a guide collar 20 to facilitate guiding the hit pin 10 into the fitting hole 11. Note that the reference numeral 21 is a gauge wheel that holds the rotary tiller 8 in a predetermined posture.

In another embodiment shown in FIGS. 11 and 12,
A release wire 22 is connected to the connecting member 17 in place of the release lever 18, and can be operated from the seat of the tractor 1.

In the work equipment mounting device with such a configuration, the tractor 1 has an auto hitch arm 5 connected to its three-point sink II ellipse 4, and the rotary tiller 8 is tilted slightly forward with its gauge wheel 21. Support your posture. and,
When the tractor 1 is moved backward, the hanger hook 6 of the automatic hitch arm 5 is engaged with the top mast 9 of the rotary tiller 8, and the front part of the rotary tiller 8 is lifted up by the three-point linkage mechanism 4, Rotary tillage device 8
Approach the auto hitch arm 5@ so that its lower part is pulled towards it. As a result, the hit pin 10 is guided by the guide collar 20 and directed into the fitting hole 11 of the fitting plate 7. At this time, the hook member 12 is
As shown in the drawings and FIG. 12, the locking member 14. Spring 1
6, etc., and as shown in FIG. Hook member 12 by force
The locking member 14, which is in contact with the cam surface of the locking member 14, rotates about the pivot shaft 15, and the engagement hole 12a of the hooking member 12 engages with the hit pin 10, as shown in FIG. FIG. 7 shows the locked state, in which the engagement protrusion 14b of the lock member 14 engages with the protrusion of the hook member 12,
Spring 16 is biased toward its locked condition. In this state, the rotary tilling device 8 is pulled and driven by a tractor to perform tilling work.

When the rotary tilling device 8 is removed from the tractor after the tilling work is completed, the locking member 14 is rotated by being pulled upward by the release lever 18 or the release wire 22, as shown in FIG. 12 unlocked. At this time, the spring 16 biases the hook member 12 beyond the fulcrum of the pivot 15 of the lock member 14 to release it.

In this state, when the tractor is moved forward and the hitch pin 10 is moved with respect to the rotary tiller 8 that is in contact with the ground, the ninth
As shown in the figure, the hook member 12 rotates and the hit pin 1
0 is pulled out, the lower link is disengaged, and then the hanger hook 6 of the auto hitch arm 5 and the top mast 9 of the rotary tilling device 8 are disengaged, and the tractor 1 is removed.
The rotary tiller 8 is removed from the rotary tiller 8, and the hook member 12 is returned to the standby state by the locking member 14, spring 16, etc., as shown in FIGS. 2, 4, and 12. In addition,
The release lever 18 is operated by the operator facing backward while riding on the tractor 1, but the release wire 22 can be used even if the operator's seat is a cabin type.

〔Effect of the invention〕

As explained above, according to the work machine mounting device of the present invention,
The following effects can be achieved.

(b) The work of connecting and uncoupling the tractor and work equipment can be performed automatically while the operator is riding on the tractor.

0 The operator can easily disconnect the tractor from the work equipment while riding on the tractor.

Q9) When the connection between the tractor and the work machine is released, it automatically enters the connection standby state, and there is no need for manual pre-certification.

2) The structure is simple, there are no operational errors, the manufacturing cost is low, and failures are rare.

[Brief explanation of the drawing]

Figure 1 is a partial perspective view of the tractor and work equipment connected, Figure 2 is a surface measurement of the automatic coupling mechanism, Figure 3 is a front view of the same,
Figure 4 is a side view showing the state of the lower link part before connection;
Figure 5 is a general plan view of the hitch pin or hook member entering the fitting hole without being pushed, and Figure 6 is the hitch pin just before entering the fitting hole and the hook member engaging with the hitch pin and being locked. Figure 7 is a side view of the locked state, Figure 8 is a side view of the lock member pulled upwards to release the lock, and Figure 9 is a side view of the hitch pin pulled out from the fitting hole. 10 is a side view of the hitch pin being removed from the fitting hole and the hook member has returned to the connection standby state; FIG. 11 is a perspective view showing another embodiment next to the lock release point;
The figure is a side view of the automatic coupling machine. 1 1...Tractor, 2...1~Tsubrink, 3...
Lower link, 4... 3-point sink, 5... Auto hitch arm, 6... Hanger hook, 7... Fitting plate, 8... Rotary tillage device, 9... Top Square 1~. 10... hitch pin, 11... fitting hole,
12... Hook member, 1315... Pivot, 14...
・Lock member, 16... spring, 17... connecting member,
18...Release lever, 19...Support ring, 20.
...Guide tsuba, 21...Gauge wheel, 22...
release wire. ○Figure

Claims (1)

[Scope of Claims] A work equipment mounting device for mounting a work implement to a three-point linkage mechanism of a tractor via an automatic coupling mechanism, wherein the automatic coupling mechanism is provided with a hanger hook at an upper center position, and the hanger A fitting plate is formed on both left and right sides of the lower part of the hook, and a fitting plate is formed with a fitting hole that can move back and forth to mate with and detach from the hitch pin of the work equipment. a hook member and a lock member, and an elastic member stretched between the lock member and the hook member, and the lock member is locked in an engaged state in which the hook member engages with a hitch pin. 1. A work machine mounting device characterized by being configured to be locked in a position where a hitch pin can be removed from a fitting hole, and a position where a hitch pin is in a connection standby state.