JPS6311524B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention is applicable to agricultural hitch pins, particularly as means for ensuring connection between two elements such as a tractor and an agricultural machine such as a plow pulled by the tractor. Regarding the designed tow pin.

(Technical background) At present, a tractor is connected to the agricultural machine to be towed via a pin integrated with a circular ring with a closed head. For such purpose, the pin is attached to a side hole along the diameter formed in a columnar projection attached to, for example, an agricultural machine to be towed by a tractor. The pin itself therefore forms a handle that prevents the disengagement of the protrusion of the agricultural machine from the corresponding component attached to the tractor, while the component generally mates with the columnar protrusion of the agricultural machine. It has an end portion provided with a circular hole. When the pin is introduced into the hole of the end part corresponding to the element connecting the tractor to the post of the agricultural machine, the pin is immediately placed in the hole along the diameter of the post of the agricultural machine, and as described above. In this way, separation of the two parts, namely the protrusion of the agricultural machine itself and the end part attached to the tractor, is prevented.

Disadvantages of conventional types of couplings or connections are the vibrations and shocks that occur during the cruising and/or operation of the tractor pulling the given agricultural machinery;
Frequently, the pin will slip out of the hole in which it is installed, or the connected members will separate, causing problems such as accidents and damage to the machine being towed.

(Problems to be Solved and Configuration) In order to prevent the above-mentioned drawbacks and inevitable problems, the present invention provides a new type of hitch pin for connecting, for example, a tractor and agricultural machinery towed by the tractor. This is what we propose. In the pin according to the present invention, a circular ring attached to the head of the pin is cut out, both ends of the ring are overlapped to form a closed ring, and the diameter of the ring is made smaller than the length of the pin. It is characterized in that the ring is similarly opened and positioned on one side or the other side of the pin by a predetermined manual operation.

In this way, once the pin has been fitted into a diameter-aligned hole in the cylindrical projection of the agricultural machine, the ring is placed on the inner side of the pin through the cutout, thereby , as long as the ring surrounding the columnar projection attached to the agricultural machine is applied to the columnar projection and is in contact with the area corresponding to the free end of the pin. Escape from the hole is prevented.
In this way, the ring is placed inside the pin. Since this pin is longer than the diameter of the ring, the pin is contained and is prevented from moving upwardly and thus from the hole in which it is installed.

In this way, the hitch pin of the present invention constitutes a means for reliably connecting between a tractor and an agricultural machine, or other two elements to be similarly connected.

An object of the present invention is to provide, for example, something that ensures the connection between a tractor and agricultural machinery.
The pin which ensures the connection or coupling has a columnar rod which has a flat slope over its entire length, while at one end of said rod there is a head with a groove at the top which is enlarged circularly at the bottom. part is formed,
A releasable safety ring is secured in the groove and has a diameter smaller than the length of the rod. In this way, once the pin or rod is installed in the corresponding hole, the ring is manually opened and transferred to the opposite side of the rod or pin;
In this way, the correct set position of the pin is ensured and separation of the two connected elements is prevented.

(Example) In the drawings, the pin according to the invention preferably includes a ring 1 in the form of a column. The rod 1 has a sloped surface along its entire length with a finished flat surface 2, one end of the rod 1 is a head 3, and the top of the head 3 is provided with a groove 4. The bottom of this groove 4 is enlarged and has a circular cross section in order to attach the open ring 5. This open ring 5 has an annular shape, and both ends of the ring 5 are overlapped.

The pin configured in this manner is used in the following manner.

For example, if a tractor is to be connected to an agricultural machine, for this purpose the agricultural machine has a columnar projection 7 at its end and the tractor also has an end section 8 . The columnar projection 7 is provided with a hole 9 along its diameter near its free end into which a rod 1 formed with a pin according to the invention is inserted. On the other hand, the end portion 8 of the tractor is provided with a hole through which the columnar protrusion 7 is inserted.
Then, the above-mentioned columnar projection 7 is inserted into the hole provided in the end portion 8, as shown in FIG. is placed outside the rod 1. And to ensure this connection,
As shown in FIG. 2, the ring 5 is opened by separating its overlapping ends 6.
must be in contact with the flat end surface 2 of the rod 1.

In this way, the length of the rod 1 is made larger than the diameter of the ring 5, and this rod 1 is therefore prevented from disengaging from the hole 9 in which it is installed. This is because the diameter of the ring 5 mentioned above is made smaller than the length of the rod 1, and the ring 5 is brought into contact with the columnar projection 7, thus preventing the rod from moving, i.e. from leaving the hole in which it is attached. be done.

Finally, FIG. 4 shows another example of application of the pin according to the invention. The pin 1 is attached to a hole in the elongated shaft 10 having a diameter that is larger than the diameter of the ring 5, and the rod or pin 1 is inserted into a hole on one side or the other side of the side hole in which the rod or pin 1 is inserted. It extends over a fairly large length.
It is therefore clear that there is no possibility of the rod 1 coming out of the hole.

In order to carry out the removal of the instrument shown in FIG. then the ring 5 can be rotated upwards and in this way the rod 1 can be pulled out, so that, for example, the columnar projection 7 connected to the agricultural machine can disengage the end part 8 connected thereto. separated.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a pin and a corresponding ring according to an embodiment of the present invention, Fig. 2 is a diagram illustrating manual operations when attaching the pin of Fig. 1, and Fig. 3 is a diagram showing two members. FIG. 4 is an enlarged side view of the pin that ensures the connection of the pin, and FIG. 4 is a perspective view showing the state in which the pin is attached to the center of the elongated shaft without detaching. 1...Rod (or pin), 2...Flat surface, 3
...Head, 4...Groove, 5...Ring, 6...End of ring, 7...Protrusion, 8...End portion, 9...
…hole.

Claims (1)

[Claims] 1. A column-shaped rod with a head formed at one end, which is designed as a connection guarantee means between two elements such as a tractor and an agricultural machine such as a plow, and which is attached to the head of the rod, and a circular ring having a diameter smaller than the length of the rod, the rod has a flat slope along its entire length and has an enlarged groove at the top of its head with a circular cross-section at the bottom. The ring is cut out and both ends thereof are overlapped so that they can be separated by manual operation, and after the hitch pin is attached, the ring is moved to the other side of the rod. Hittipin.