JPS6238489Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connecting device for detachably connecting two connecting parts.

For example, when connecting a tiller to a tractor, the end of the lower link, which is the connecting part of the tractor, and the connecting fitting for the lower link, which is the connecting part of the tiller, are usually connected by connecting the tiller to the tiller. This is done by aligning the pin hole drilled in the end of the lower link with the pin hole drilled in the connecting fitting while moving it, and then inserting the pin into both pin holes. It is extremely difficult and labor-intensive to align both pin holes while moving the pin hole, and to insert the pin while keeping both pin holes aligned and aligned. The reality is that this connection work cannot be easily performed.

In view of the above-mentioned circumstances, the present invention provides a novel coupling device that can extremely easily connect two coupling parts when coupling a tiller to a tractor.

That is, the coupling device of this invention has a first coupling body provided in one coupling part and having a fitting recess formed in a triangular shape tapering upward and downward on the front and rear surfaces in the direction of movement of the aircraft and on the left and right sides thereof, and the other coupling part. a second connecting body having a tapered triangular fitting protrusion that is provided in the connecting part of the first connecting body and can be fitted into the fitting recess of the first connecting body in a substantially intimate manner; In a state where the fitting recess and the fitting protrusion are fitted in a substantially tight state, a connection structure including a fixing device for removably connecting and fixing is attached to the left and right lower links of the three-point link mechanism. This is characterized in that the top link and the upper arm to be connected in the three-point link mechanism are configured to be connected separately from the left and right lower link portions by separate connecting pins.

Next, an embodiment will be described with reference to the figures.

In the figure, reference numeral 1 indicates a pair of left and right lift arms 4, 4 which are located below the driver's seat 2 and are operated to move up and down by an appropriate operating mechanism (not shown) between the pair of left and right rear wheels 3, 3. , a pair of left and right lower links 5, 5 that are supported so as to be movable up and down, a pair of left and right lift links 6, 6 that connect the ends of each lift arm 4 and a proper position of each lower link 5, and lower links 5, A link hitch 7 fixedly installed in the upper direction of the center between 5 and
The tractor is equipped with a so-called three-point connection mechanism configured with a top link 8 connected to the end of the link hitch 7 so as to be movable up and down, and 9.
The transmission tube 1 is installed on both sides of the gearbox 10.
1 and 11, tilling rotary 12 and tail wheel 1
This is a tillage work machine that supports a pair of transmission cases 14, 14 equipped with a third gear.

This tilling work machine 9 has lower link connecting fittings 15 protruding from each transmission tube 11 connected to each lower link 5, and an upper arm 16 erected on a gear box 10 connected to the top link 8. It is connected to the tractor 1, and is lifted and lowered between a working position and a non-working position where it can be raised significantly by vertically moving the lift arm 4 and vertically displacing each lower link 5. .

In this embodiment, the present invention is applied to the above-mentioned tractor 1.
A connecting device 1 for connecting the connecting portion of the tiller and a connecting portion of the tilling work machine 9, and especially connecting each lower link 5 and each connecting fitting 15.
In this embodiment, the connecting device 17 is constructed as follows according to the present invention. The top link 8 and the upper arm 16 are configured to be independently connected or disconnected by a connecting pin 29, separate from the connecting portion between the lower link 5 and the tilling machine 9.

That is, in the connecting device 17, a connecting piece 18 is rotatably supported 19 on each connecting fitting 15 along the front-rear direction of the tilling work machine 9, and a pyramid-shaped first connecting body 20 is attached to each connecting piece 18. A pyramid-shaped fitting recess 21 is formed in each of the first connecting bodies 20, and the fitting recess 21 is formed in a pyramid shape and narrows from the bottom surface toward the top, and the fitting recess 21 is formed in the right and left direction of the tilling machine 9. A first through hole 22 passing through the hole 21 is provided, and a pyramidal shape is provided on the upper surface of the end of each lower link 5 so that the first through hole 22 can be fitted tightly into the fitting recess 21 from the bottom surface of the first connecting body 20. A second connecting body 23 having a fitting convex part 24 is fixed with the top part 24a of the fitting convex part 24 facing upward, and the fitting convex part 24 of each second connecting body 23 is fixed to the second connecting body 23 having a fitting convex part 24. A second through hole 25 is provided along the left and right direction of the tractor 1, and the second through hole 25 communicates with the first through hole 22 when the convex portion 24 is tightly fitted into the fitting recess 21, and the two connecting bodies are connected to each other. 20, 23
When the fitting concave portion 21 and the fitting convex portion 24 are closely fitted, the pins 26 are inserted into the through holes 22 and 25 which are in communication with each other, so that they are removably connected and fixed. It is structured so that it can be done.

In this embodiment, especially when the first connecting body 20 and the second connecting body 23 are connected and fixed with the pin 26 (FIGS. 1 and 5), the rotation fulcrum 27 of the lower link 5 and The connection point 28 between the lower link 5 and the lift link 6 and the pivot point 1 of the connection piece 18 which is the connection point between the lower link 5 and the connection fitting 15
9 are arranged on the same straight line (see Fig. 1).

Next, to explain the operation of the above embodiment, when the tilling machine 9 is connected to the tractor 1,
First, the tractor 1 and the tilling machine 9 are placed in a state where they can be connected, and while the tilling machine 9 is slightly lifted, the fitting protrusion 24 of the second connecting body 23 fixed to each lower link 5 is inserted. The fitting recesses 21 of the first connecting bodies 20 connected to the respective connecting fittings 15 are tightly fitted.

At this time, since both the fitting concave portion 21 and the fitting convex portion 24 have a tapered shape, as long as the top portion 24a of each fitting convex portion 24 enters each fitting concave portion 21 even slightly (the third Figure A), followed by tilling machine 9
artificially vibrate or lift arm 4.
By simply slightly swinging and displacing the lower link 5, each fitting convex portion 24 is fitted tightly into each fitting recess 21 (FIG. B), and the fitting convex portion 24 and the fitting recess 21 are tightly fitted into each other. Since the cross-sectional shape of the mating convex portion 24 is a rectangular shape that cannot rotate with respect to each other, when the mating concave portion 21 and the mating convex portion 24 are closely fitted, the first through hole is securely fitted. 22 and the second through hole 25 are brought into communication with each other.

Therefore, the operation of fitting the two connecting bodies 20, 23 into a state in which the through holes 22, 25 are brought into communication with each other can be carried out very easily and easily.

Then, each of the connecting bodies 20 and 23 is inserted into each of the through holes 22 and 25 which are connected to each other with a pin 26.
Insert and connect and fix each lower link 5.
The connection work between the connecting fittings 15 and each connecting fitting 15 is completed.

At this time, when the engaging recess 21 and the fitting protrusion 24 of each of the connecting bodies 20 and 23 are tightly fitted,
Even if the tilling machine 9 is not held artificially, the through holes 22 and 25 are maintained in a communicating state, so that the work of inserting the pin 26 into each of the through holes 22 and 25 is easy. It can be done easily.

After each lower link 5 and each connecting fitting 15 are connected, the top link 8 and upper arm 16 are connected by a connecting pin 29 to complete the connection work of the tiller 9 to the tractor 1. Of course, the connection between the top link 8 and the upper arm 16 can be easily performed since the connection between each lower link 5 and each connection fitting 15 has already been completed.

In the above embodiment, an example was shown in which the connecting device 17 is configured to connect the lower link 5, which is the connecting part of the tractor 1, and the connecting fitting 15, which is the connecting part of the tilling machine 9. The scope of application is
Of course, the present invention is not limited to the above embodiment.

Further, in the above embodiment, both the connecting bodies 20,
The fixing device for connecting and fixing the pins 23 includes the pin 26 and the first and second through holes 22 and 25 into which the pin 26 is inserted. The fitting convex portion 24 of the second connecting body 23 passes through the through hole 30 formed in the connecting body 20.
It is also possible to connect and fix both the connecting bodies 20 and 23 by screwing a bolt 32 into a screw hole 31 formed in the screw hole 31 .

In any case, as can be easily understood from the above explanation, the coupling device of the present invention has fitting convex portions 24 formed in a triangular shape tapering upward on the front and rear surfaces in the direction of movement of the aircraft and on the left and right sides thereof. The second connecting bodies 23, 23 having the above-mentioned second connecting bodies 23, 23 are installed on the left and right lower links 5, 5 of the three-point link mechanism on the tractor 1 side, respectively, and the second connecting bodies 23, 23 are installed on the working machine 3 side. A first connecting body 2 having a tapered triangular fitting recess 21 that can be fitted into the fitting convex portion 24 in a substantially tight manner on the front, rear, right and left sides.
0, 20 are installed correspondingly, each connecting body 20, 23, 2
0 and 23 are provided with fixtures 32 and 32 for removably connecting and fixing the fitting concave portion 21 and the fitting convex portion 24 in a substantially tightly fitted state, and Top link 8 in point link mechanism
Since the upper arm 16 on the working machine side can be independently connected and disconnected by another connecting pin 29, when connecting the working machine to the tractor side, the lower link side can be connected in either the front, back, left or right direction. By fitting the triangular fitting parts together, you can naturally position them in the correct connection position, and then insert the fixing tool to completely connect and fix them, making it easy to align. In addition, it is extremely easy to insert and insert the fixture, and
Once the connection and fixation on the lower link side is completed, the relative positions of the top link and upper arm will automatically match, so pin holes can be aligned with a simple operation of moving the lower link or the work equipment side up and down. The whole thing can be installed easily.

Furthermore, the lower link and top link of the three-point linkage mechanism are connected to form a connecting frame on the tractor side,
If a connected frame corresponding to the connecting frame is configured on the working machine side, and the working machine is positioned and connected by matching both connecting frames, a part of the connected frame can be connected to the connecting frame on the tractor body side. After hooking the machine, the entire work equipment side must be pulled toward the tractor body side so that the two connecting frames completely align with each other, so when connecting, there is no risk of the heavy work equipment butting against the connecting frame in a collision state. Therefore, the whole must be made strong, but in the present invention, a positioning connection part is installed on the left and right lower links, and the connection between the top link and the upper arm is done separately.
There is no collision during the connection work, and there is no need to make the entire connection part an unnecessarily large and strong structure, resulting in weight reduction.

In addition, if the lower link and top link of the three-point linkage mechanism are used as a connecting frame to form a connecting part as described above, it is not possible to change the width between the left and right lower links. Since the positioning connection body is installed independently on the work machine, even if another work machine is to be replaced, the connection body on the other work machine side can be installed at the appropriate position on the work machine itself, and the lower It can be adapted by changing the link width and can be used in a wide range of applications.
There are some advantages.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the coupling device according to the present invention. Figure 1 is a side view showing a state in which a tiller is connected to a tractor, and Figure 2 is a partially cutaway view. 3 is a partial longitudinal sectional side view of the same essential parts, and 4 is a sectional view taken along the line -- of FIG. 3.
FIG. 5 is a cross-sectional view of the main part taken along the - line in FIG. 1. 5...Lower link, 8...Top link, 15
...Connection fitting (connection part), 17 ...Connection device, 1
6... Upper arm, 20... First connecting body, 2
1... Fitting recess, 22... First through hole, 25...
2nd through hole, 26... pin, 30... through hole, 3
1...screw hole, 32...bolt (fixing tool), 23...
...Second connecting body, 24...Fitting convex portion, 32...Fixing tool.

Claims (1)

[Scope of utility model registration request] The second connecting bodies 22 and 23 each having a triangular fitting convex portion 24 tapered upward on the front and rear surfaces in the machine traveling direction and on the left and right sides thereof are connected to the left and right lower links 5 in the three-point linkage mechanism on the tractor 1 side. . First connecting body 2 having a triangular fitting recess 21
0, 20 are installed correspondingly, each connecting body 20, 23, 2
0 and 23 are provided with fixtures 32 and 32 for removably connecting and fixing the fitting concave portion 21 and the fitting convex portion 24 in a substantially tightly fitted state, and Top link 8 in point link mechanism
A connecting device characterized in that the upper arm 16 on the working machine side can be independently connected and disconnected by another connecting pin 29.