JPS58570Y2 - Tractor rotary drawbar device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotatable drawbar device that is attached to an agricultural tractor.

In general, a drawbar hit for an agricultural tractor has a pitch bracket 2 attached to the lower surface of a transmission case 1, a drawbar hit 3 inserted into the pitch bracket 2 so as to be slidable back and forth, and a pin 4 as shown in FIGS. When in use, the pin 4 is removed and the drawbar hitch 3 is slid rearward to be pulled out, and conversely, when not in use, it is pushed forward and stored.

However, such a sliding operation of the drawbar hitch 3 cannot be performed by simply extending a hand from the side, and it is necessary to always move the body close to the drawbar hitch 3 side.

In that case, such operations are often performed with the rotary 5 or other working equipment attached, and for that purpose, it is necessary to crawl under the rotary 5, etc., which is difficult to operate, and the rotary There was a drawback that clothes etc. were stained by the mud that adhered to the 5th grade.

The present invention has been developed in view of the drawbacks of the conventional example, and the drawbar hit can be easily stored and taken out by rotating the drawbar hit without crawling under a working machine such as a rotary. It is made to be operable.

The configuration of the present invention will be explained below based on the drawings showing one embodiment.

In FIGS. 3 and 4, the drawbar hitch 6 is formed into a long plate shape as shown in the figure, and a U-shaped pitch piece 7 is fixed to the tip of the drawbar hitch 6 as in the conventional case. A hit pin 8 is attached so that it can be freely inserted and removed.

A mounting hole 9 is bored at the base end of the drawbar hitch 6.
The drawbar hitch 6 is mounted so as to be rotatable in the horizontal direction by a bolt 10 that is loosely inserted into the mounting hole 9 and screwed onto the lower surface of the mission case 1 forming the body of the tractor.

On the other hand, a groove 12 having a flat surface 11 as shown in the figure is formed in the rear end of the transmission case 1, and a pin hole 13 is bored in the middle part of the drawbar hitch 6 corresponding to the groove 12. A locking pin 14 is removably inserted into this pin hole 13.

The head 15 of the locking pin 14 fits into the groove 12, and a portion of the head 15 is formed flat by press working or the like, and the flat surface 16 is formed in the flat surface 11 of the groove 12. In this way, the locking pin 14 itself is prevented from rotating, thereby preventing wear of the pin 14, and also preventing rotation of the drawbar hitch 6.

Furthermore, a groove 18 having an oblique surface 17 similar to the groove 12 at the rear end of the mission case 1 is formed on the side of the mission case 1, so that the drawbar hitch 6 can be rotated approximately 90' in the horizontal direction. , the drawbar hitch 6 is fixed.

The storage and removal of the drawbar hitch 6 of the present invention is as follows.

That is, as shown by the solid line in FIGS. 3 and 4, the state in which the drawbar hit 6 is protruded rearward is when it is in use.
To store it from this state, pull out the locking pin 14 from the groove 12 and pin hole 13, rotate the drawbar hitch 6 horizontally about 900 times, and insert the pin hole 13 into the groove 18 on the side of the transmission case 1. The locking pin 14 may be inserted into the recessed groove 18 and the pin hole 13 to fix the locking pin 14, and the reverse operation may be performed to remove the locking pin 14.

The present invention has the above-mentioned configuration, and as described above, in the present invention, the drawbar hit is not slid as in the past, but is rotated for storage and removal. It can be easily operated by simply extending your hand without having to crawl under the working machine, so it can be easily operated without staining clothes or the like.

In addition, in the present invention, since the base of the drawbar hit only needs to be pivotally attached to the fuselage, there is no need for a housing and the structure is simplified. By simply attaching the drawbar hitch to the drawbar hitch in a removable manner, it is possible to prevent the drawbar hit from rotating in the drawn out state and the retracted state.

Therefore, in order to prevent the drawbar hit from rotating when the drawbar hit is pulled out or stowed, there is no need to provide a hole for inserting a locking pin (two required for when stowed and when pulled out) on the fuselage side. Only one such hole needs to be formed in the drawbar hitch, which requires less man-hours for drilling the hole, and furthermore, as mentioned above, it is difficult to drill a hole on the aircraft side into the thick mission case. in,
Therefore, it is necessary to provide a protrusion for forming holes.
This creates an unnecessary protrusion, and there is a risk that this protrusion may collide and damage the expensive transmission case, etc.
The present invention does not have such drawbacks, and the overall structure is simple and inexpensive, and there is little risk of damage.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a conventional tractor, Fig. 2 is a side view of a drawbar hitch, Fig. 3 is a partial longitudinal cross-sectional side view of a drawbar hitch showing an embodiment of the present invention, and Fig. 4 is a similar side view of the drawbar hitch. FIG. 1...Mission case, 6...Draw bar hitch, 14...Lock pin.

Claims (1)

[Scope of utility model registration request] The base of the drawbar hit is horizontally rotated on the back side of the tractor body so that the drawbar hit that protrudes toward the rear of the tractor body can rotate at least between a state in which it protrudes rearward and a state in which it protrudes to one of the left and right sides. When the drawbar hit is movably pivoted, and the drawbar hit is protruding rearward or to one of the left and right sides, a locking pin detachably attached to the drawbar hit prevents the rotation of the drawbar hit. 1. A rotary retractable drawbar device for a tractor, characterized in that the locking pin is brought into contact with a rear wall surface and a side wall surface of a fuselage body to prevent this.