JPS6242803Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a swing drawbar for a tractor.

First, FIG. 1 shows a conventional example. Reference numeral 1 denotes the body of a tractor. A guide 2 having a wide left and right width is fixed to the rear end of the body 1, and a traction rod 3 for connecting a working machine is inserted through the guide 2 so as to be movable in the front, rear, left and right directions. Further, another holder 4 is fixed to the rear lower surface of the fuselage 1, and one end of the traction rod 3 is rotatably connected to this holder 4 by a pin 5, and a retaining pin 6 is inserted into the lower end of this pin 5. ing.

However, in such a device, since the retaining pin 6 faces the ground surface, there is a risk that it will interfere with an obstacle and be damaged or fall off, causing the pin 5 to come off and the traction rod 3 to come off. Further, in order to adjust the rearward protrusion length of the traction rod 3, the pin 5 is inserted into the traction rod 3, but each time the pin 5 is inserted into the traction rod 3, the pin 5 must be inserted deep under the fuselage 1, which is extremely troublesome.

This invention was devised in view of these points, and the purpose is to provide a swing drawbar for a tractor that reliably prevents accidents in which the traction rod falls off, and also allows for easy attachment of the traction rod. .

In this invention, the support body rotatably attached to the body of the tractor is fitted with the traction rod, and the adjustment pin is used to prevent the traction rod from coming off. A retaining pin is inserted into the upper protruding end of the adjustment pin, and this retaining pin is surrounded by a recess formed at the rear end of the fuselage, thereby preventing the retaining pin from being damaged or falling off due to interference with obstacles. This prevents the adjustment pin and the traction rod from falling off while traveling, and furthermore, by forming a recess on the lower surface of the rear end of the fuselage that surrounds the adjustment pin that connects the support and the traction rod, the adjustment pin can be easily inserted. The structure is such that the attachment work can be easily carried out at the rear of the aircraft without getting under the aircraft.

An embodiment of this invention will be explained based on FIG. 2.

The same parts as those shown in FIG. 1 will be explained using the same reference numerals. A guide 2 is fixed to the rear end of a body 1 of the tractor, and a holder 4 is attached to the lower rear surface of the body 1. One end of the rectangular cylindrical support body 7 is supported by the holder 4 and is attached to the lower surface of the mission case 9 by bolts 8 so as to be rotatable in the left and right directions. The guide 2 has a wide width in the left and right directions, and has a plurality of mounting holes (not shown) for mounting pins and bolts that are connected to both sides of the support 7.

That is, the guide 2 holds the support body 7 so as to be able to adjust the position at any angle with the bolt 8 as the center.

Next, a traction rod 10 having a plurality of holes (not shown) formed in the longitudinal direction through which adjustment pins 9 are inserted is slidably fitted into the support body 7. The adjustment pin 9 protrudes from the lower surface to the upper surface of the support body 7, and a retaining pin 11 is inserted into the protruding end thereof. This retaining pin 11 is a split pin, and is bent after insertion to prevent itself from being withdrawn.

Then, a recess 1 surrounding this retaining pin 11 is formed.
2 is formed on the lower surface of the rear end of the fuselage 1. The recess 12 is defined in a range that opens the end of the adjustment pin 11 when the support rod 7 is moved to both outer sides of the guide 2. Furthermore, the traction rod 10
A holding plate 13 for preventing the working machine from floating and a connecting pin 14 for connecting the working machine are provided at the rear of the machine.

In such a configuration, the working machine connects the connecting pin 1
4 is connected to the traction rod 10. Since the retaining pin 11 is surrounded by the recess 12 during running, it will not be damaged or come off due to interference with obstacles. As a result, the adjustment 9 will not come off and the traction rod 10 will not fall off.

When adjusting the protruding length of the traction rod 10 with respect to the support 7, the adjustment pin 9 is inserted and changed, but since the adjustment pin 9 is located near the rear end of the fuselage 1,
The adjustment pin 9 can be replaced without going deep into the lower surface of the holder. At this time, when the support rod 7 is brought to one side of the guide 2, the retaining pin 11 appears from the recess 12, making the work easier.

Since this device is constructed as described above, the support body and the traction rod are connected by an adjustment pin, and this adjustment pin is prevented from coming out by a retaining pin, and the retaining pin is surrounded by a recess formed in the body of the machine. It is possible to prevent the retaining pin from being damaged or coming off due to interference with obstacles, and accordingly, it is possible to prevent the adjustment pin and the traction rod from falling off, and furthermore,
By forming the concave portion in which the adjustment pin is located on the lower surface of the rear end of the fuselage, the adjustment pin can be easily attached and removed at the rear of the fuselage without having to go deep into the underside of the fuselage. It has the following.

[Brief explanation of drawings]

FIG. 1 is a side view showing a conventional example, and FIG. 2 is a side view showing an embodiment of this invention. 1... Body, 7... Support body, 9... Adjustment pin,
10... Traction rod, 11... Retaining pin, 12...
recess.

Claims (1)

[Scope of utility model registration request] A support is provided on the lower surface of the tractor body so as to be rotatable in the left and right directions, a guide is attached to the rear end of the body to guide the support and fix it in any position, and a traction mechanism that extends rearward to the support is attached to the rear end of the body. An adjustment pin that fits the rod so as to be slidable in the front-rear direction and arbitrarily determines a rearward protrusion length of the traction rod with respect to the support is inserted through the traction rod from the lower surface of the support at a position immediately before the guide. and a retaining pin is inserted into the protruding end of the adjustment pin protruding from the upper surface of the support, and a recess surrounding the retaining pin is formed on the lower surface of the rear end of the body of the tractor. Tractor swing drawbar.