JPH0745368Y2 - One-touch hitch structure that connects the tractor and work implement - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-touch hitch structure for connecting a tractor and a working machine.

[0002]

[Technical background] A manual type in which bolts and nuts are fastened to the connecting means between the lower link on the tractor side and the working machine, and the lower link on the tractor side is hydraulically raised to the chuck mechanism attached to the working machine side, There are two types, a mechanical type that makes the chuck mechanism bite.

[0003]

2. Description of the Related Art A manual method for fastening with bolts and nuts
The chuck mechanism attached to the industrial machine side is attached to the lower part of the tractor side.
-If the link is hydraulically lifted and bites into the chuck mechanism
Of the two types of connecting means with mechanical type, the latter mechanical type is commonly called a one-touch hitch. When the device is disengaged from the device and the disengagement operation is completed, the lock pin is returned to the original position, and preparation for accepting the lower link, putting on and taking off, respectively, requires prior manual operations.

[0004]

As described above, in the so-called "one-touch hitch" device of mechanical attaching / detaching means,
The previous operation is performed every time when you "wear" and "detach", and you had to perform the operation twice for the convenience of putting on and taking off. The purpose of the present invention is to unlock only by the operation, mechanically maintain the unlocked state until the next connection, reduce the number of manual operations by half, and reduce the troublesomeness.

[0005]

SUMMARY OF THE INVENTION The present invention provides a means for achieving the above-mentioned object from the rear end of a tractor .
Two lowerlins that project almost horizontally and move up and down
A human <br/> Tchiyunitto connecting member to be removable from the coupling rod connecting the ends of the click, the steel plate to affix mounted on the work vehicle side
The fixing member made of material and the acting member made of steel plate
The shafts are pivotally attached to each other so that they can slide in contact with each other.
Each of these fixing members and each of the working members should have a shaft center of the shaft.
At the same distance from each other, the connecting portion of the connecting rod
Bottom of each of the engaging groove and the engaging groove that can be inserted and engaged by
Each of the openings when the groove bottoms are aligned.
Formed by opening each edge so that the parts do not match
However, this acting member is not in contact with the fixing member to be joined.
A part of the support frame provided on the mating side and the acting member are drilled.
The locking pin can be freely moved and rotated in the axial direction through the insertion hole.
So that the through shaft is supported and one end is hooked on the locking pin.
Enclose the stopped spring and lock the other end to the support frame.
And always point in the direction of the fixing member with respect to the locking pin.
For the pressure action, the engaging groove and the engaging
When the bottoms of the mating grooves are aligned, the locking pin is inserted and fitted.
A locking hole that can be fitted is formed in the fixing member by drilling.
Connect to the rear end of the locking pin and direct the tip of the locking pin
And a grip portion having a hooking portion at the tip thereof
The hook so that it is near the tip of the locking pin.
Of the locking pin against the elasticity of the spring.
The tip is flush with the joint surface of the fixing member of the working member, or
Hooking hook part of the gripping part when retracted from the flush state
If the notch is recessed in the support frame at a position where the
Together, further, in a part of the fixing member, the support
The hooks that engage with the notches that are recessed in the frame
Place the stopper at a position where it can be contacted by turning
It is formed by projecting .

[0006]

First of all, the function of moving from the connected state to the disconnecting state will be described.

The fixing member and the acting member constituting the hitch unit are rotatably joined together by one shaft so as to engage with each other and engage with the engaging grooves and locking grooves of the substantially inverted U shape. The connecting rod is supported by the directions of the openings of the engaging groove and the engaging groove being different.

[0008] Fixed member and acts as the fixed member and connecting rod hooked under the action member can not be disengaged
Both members are kept fixed by inserting locking pins.

The locking pin is attached to the working member side and the working member.
It is attached so that it can rotate and move in the axial direction by penetrating through the insertion hole of the attached support frame.
And the the insertion fitted fixing member the engaging hole of the fixing member facing against the outer side of the working member and in part by the resilience of the interposed a spring and acting member maintaining immobility.

The above is connected to the connecting rod connecting the rear ends of the two lower links arranged in parallel in the horizontal direction from the rear of the tractor side and the hitch unit mounted on the working machine towed by the tractor. It is in a state.

Next, from the hitch unit to the lower link
Explaining the action for detaching the connecting rod,
One letter for the retaining hole and the insertion hole of the fixed member and the acting member
The locking pin that is inserted in the shape of the
As a means to
The pulling operation is performed against the elasticity of the engaged spring.
Is Umono.

At such a stage, the acting member can no longer rotate about the shaft with respect to the fixed member.

Therefore, when a lowering operation is performed on the connecting rod on the lower link side, the action member is guided by this operation to rotate, and the opening portions of the engaging groove and the locking groove supporting the connecting rod are opened. In unison, the connecting rod can be disengaged from the hitch unit.

On the other hand, in the hitch unit, pull first.
Hold the gripping part connected to the locking pin that has been punched out.
Of the support frame.
Insert into the U-shaped notch on the top surface .

The hooks inserted into the notches of the support frame are
By loosening the pulling operation of the grip ,
Due to the action of the ring, the locking pin is
As it moves forward, the hooks in the notches also move forward.
The forward movement is stopped by coming into contact with the wall side of the cutout portion.

In the above state, the tip of the locking pin and the outer surface of the operating member are flush with each other.

In this way, the hitch unit maintains the shape of the connecting rod when it is disengaged from the hitch unit, and the openings of the engaging grooves and the engaging grooves with which the connecting rod is engaged are in good contact. It has a wide opening so that the connecting rod can be immediately received at any time.

Once again, the connecting rod on the lower link side rises and is inserted from the openings of the engaging groove and the engaging groove in the hitch unit, and if the ascending action is further continued, the engaging groove Also, because the direction of the groove is different,
As the connecting rod is moved upward, the engaging groove of the fixing member is set to the reference position, and the locking groove of the acting member is rotated accordingly, so that the acting member rotates with the engaging depth of the connecting rod. When it moves, the latching hook of the locking pin that was locked in the notch of the support frame until then is pushed by the stopper on the side of the fixed member that rotates from the rear, and the notch that was locked. Unlimited movement is allowed after leaving the club.

In this way, the tip of the locking pin, which tends to move by the elastic force of the spring, acts so as to project from the outer surface of the working member, abuts on the side surface of the fixing member, and slides.

When the connecting rod reaches the innermost ends of the engaging groove and the engaging groove, the tip of the engaging pin is aligned with the engaging hole in the fixing member, and the elastic force of the spring causes the advancing action. The fixed member and the acting member are fitted and inserted into the matching hook holes to complete the immobile state.

When the fixing member and the acting member are united with each other and the immovable state is formed in this way, since the groove directions of the engaging groove and the engaging groove are made different, the connecting rod is It is impossible to escape from.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. The hitch unit A includes a fixing member 1 fixed to a working machine (both not shown) towed by a tractor, and a fixing member 1 attached to the fixing member 1. And an action member 3 pivotally attached to the shaft 2.

Both the fixing member 1 and the acting member 3 are made of steel plates, and a supporting frame 4 is provided on one surface of the latter acting member 3, and the supporting frame 4 and the acting member 3 are perforated. The locking pin 7 is inserted into the insertion hole 6 so as to be movable back and forth in the axial direction and rotatable, and between the part of the locking pin 7 and the inner surface of the action member 3 in the support frame 4. A spring 10 that extends in the direction of the spring is surrounded, and the tip of the locking pin 7 is always urged to project toward the outside of the acting member 3, and the support frame is resisted against the elastic force of the spring 10. The contraction limit is set such that the tip of the locking pin 7 and the outer surface of the action member 3 are submerged inward from the flush position and are not deviated from the insertion hole 6 when they are inserted into the fourth side.

On the other hand, one top link projecting rearward from the rear end of the tractor and two lower links 16 are arranged so that the end positions are vertical planes, and an isosceles triangle having the top link as an apex. 2 lower links 1 arranged in parallel so as to form the bottom side thereof.
A connecting rod 15 is attached so as to connect between 6 and 16.

At a position where the shaft-shaped connecting portion 15a near the both ends of the connecting rod 15 is connected to the hitch unit A of the present invention, a substantially U-shaped engagement is made so that a half circumference of the connecting portion 15a can be engaged. The fitting groove 13 and the locking groove 14 are relatively widened on one side of the fixing member 1 and the acting member 3, and opening portions 13a and 14a exhibiting an accepting action are opened, and in particular, the fixing member 1 is pivotally attached to the fixing member 1 by a shaft 2. The opening 14a of the locking groove 14 in the acting member 3 is arranged so that the locus of the acting member 3 when it is rotated matches the engaging groove 13 of the fixed member 1, and
When the semicircular ends of the innermost portions of both are aligned, the semicircular ends of the connecting rod 15 are formed so as to be able to come into contact with most of the outer periphery of the connecting portion 15a, and the openings 13a, 1
4a points in a different direction and opens.

Thus, the engaging groove 13 and the engaging groove 14
When the innermost part of the above is in a matched state, a locking hole 11 penetrating the fixing member 1 is formed at the tip-directed position of the pin 7 so that the above state can be fixed and maintained.

Further, a stopper 12 is provided on one side of the fixing member 1 so as to project toward the acting member 3 side, and a grip portion 8 formed as a part of the locking pin 7 pulled out from the locking hole 11 of the fixing member 1. It is provided at a position where the hooking hook portion 9 at the tip abuts and the locking pin 7 does not communicate with the locking hole 11 of the fixing member 1.

In addition, a notch 5 having a substantially U-shape is provided in a part of the upper side of the support frame 4, and the hook 9 is provided in order to maintain the pulled-out state of the locking pin 7. Engage,
During engagement, can in engagement with a pressed state at a corner portion engaging hook 9 of the notch 5 by the elastic force of the spring 10
To be formed .

In the figure, reference numeral 17 is a mounting hole of the fixing member 1 provided for mounting on the working machine B side.

[0030]

[Effects of the Invention] With the above-described structure, the present invention maintains the unlocked state until the next connection is made by only one operation when attaching and detaching the tractor and the working machine. However, since this is a compliant state and these attachment / detachment operations are halved from the previous operation work amount, the attachment / detachment operation can be simplified and the accidents that can occur with the work can be halved. There is an effect that can be.

[0031]

[Brief description of drawings]

Figure 1 Side view of the entire device Figure 2 Front view of Figure 1 Figure 3 Front view of the end of the connecting rod Figure 4 Side view of the fixing member 5
Front view of FIG. 6 side view of action member FIG. 7 front view of FIG. 8 perspective view of locking pin

[0032]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing member 2 Shaft 3 Working member 4 Support frame 5 Notch 6 Insertion hole 7 Locking pin 8 Gripping 9 Locking hook 10 Spring 11 Locking hole 12 Stopper 13 Engaging groove 13a Opening 14 Locking groove 14a Opening Part 15 Connecting rod 15a Connecting part 16 Lower link 17 Mounting hole A Hitch unit B Working machine

Claims (1)

[Scope of utility model registration request] 1. A substantially horizontal projection from the rear end of the tractor
And the ends of the two lower links 16 that move up and down
A hitch unit A of a connecting tool that can be detachably attached to a connecting rod 15 to be connected, and a steel plate that is fixedly mounted on the working machine B side is a base material.
Fixing member 1 made of a material and an operating member 3 made of a steel plate
The shafts 2 are pivotally attached to each other so that they can slide in contact with each other.
The fixed member 1 and the acting member 3 each have the shaft.
The connecting rod 15 is provided at a position separated by the same distance from the axis of 2.
If the connection groove 15 in which the connecting portion 15a in FIG.
At the bottom of each of the locking grooves 14,
When the bottoms are aligned, the openings 13a and 14a are not
This is formed by opening each edge so that it will be in a close position.
Non-bonding surface of the acting member 3 with the fixed member 1 to be bonded
A part of the supporting frame 4 provided on the side and the acting member 3
The locking pin 7 can be freely moved and rotated in the insertion hole 6 in the axial direction.
So that the through shaft is supported so that
Enclose the spring 10 with the other end hooked up and support the other end
Locked to the frame 4 and fixed to the locking pin 7 at all times
The pressure operation for directing the direction of the member 1 is biased, and
The respective groove bottoms of the engaging groove 13 and the engaging groove 14 are coincident with each other.
Fix the locking hole 11 into which the locking pin 7 can enter and fit
The member 1 is formed by boring, and the rear end of the locking pin 7 is formed.
Connect it so that it points in the direction of the tip of the locking pin 7,
The gripping part 8 having the hooking part 9 at the tip,
The part 9 is formed in the vicinity of the tip of the locking pin 7,
Further, the tip of the locking pin 7 is resisted against the elasticity of the spring 10.
The end is flush with the joint surface of the fixing member 1 of the acting member 3, or
Hooking of the grip portion 8 when retracted from the flush state
The notch 5 is attached to the support frame 4 at a position where the hook 9 can be locked.
In addition to being recessed, the fixing member 1 also has a part of the odor.
To engage with the notch 5 formed in the support frame 4
The hook 9 can be contacted by the rotation of the fixing member 1.
A one-touch hitch structure for connecting a tractor and a working machine, which is characterized in that a stopper 12 is formed in a protruding position .