JPH06887Y2 - Work implement mounting device for tractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a small tractor to which a working machine that operates in the middle of the machine width is mounted by a two-point link.

(B) Conventional technology It has been already known that, in a small tractor in which a working machine that operates in the middle of the machine width is mounted by a two-point link, a lower link is mounted and the working machine is mounted by a three-point link. .

(C) Problems to be solved by the invention Due to the structure of the known small tractor, the tire tread is narrow, and when the working machine is mounted by the three-point link system, the distance between the lower link and the bracket that connects the liner. When the working machine swings to the left and right like a go or a plow, as shown in Fig. 5, the lower link comes into contact with the bracket, so the bracket must be removed, and its attachment and detachment is troublesome. Met.

(D) Means for Solving Problems The present invention relates to a tractor in which a working machine is mounted on a rear portion of a mission case via mounting brackets having connecting metal on both sides, and a cylinder in which the mounting bracket is attached to the mission case. -Shaped front bracket and a rear bracket that has connecting gold on both sides and is rotatably engaged with the front bracket, and is displaced approximately 90 degrees between the rear bracket and the front bracket. And the rear bracket is approximately 90
By rotating the rear bracket by 90 degrees, the holes are aligned with each other and the pins are inserted into the holes so that the connecting bracket is held at the upper and lower positions. The above-mentioned problems are solved by arranging them so that the working machine can be mounted by a three-point link without removing the bracket.

(E) Action When mounting the rotary cultivator to the tractor, the rear bracket should be in a position in which the connecting gold is located on both the left and right sides, and the pins protruding left and right from the front part of the rotary cultivator should be fitted to the left and right connecting gold Then, the connecting pin is inserted into the connecting metal from above and connected.

In addition, when attaching a working machine such as goose or plow to the tractor with a three-point link, the rear bracket is rotated 90 degrees so that the hole formed in it is aligned with the hole formed in the front bracket. , When the connecting pin is inserted through these holes, the connecting metal is held in the upper and lower positions at the center of the machine width, so the front parts of the left and right lower links are connected to the lower link brackets on the side of the machine. Connect the lower part of the work machine to the rear part of the lower link.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a mission case provided at a rear portion of a tractor for driving a rear wheel and projecting a PTO shaft 2 from the rear surface.

Reference numeral 3 denotes a rotary tiller, which has a plurality of tillage claws 8 ... Attached to a chain case 7 suspended from a rotary frame 5 and a tiller shaft 7 supported by a support bracket, and a middle portion of a rear cover 10 is attached by a toolbar 11. The rotary frame 5 is provided with a hitch pin 12 projecting left and right at the front portion thereof.

The mounting bracket 13 that connects the rotary tiller 3 to the tractor is a rear bracket made of a tubular body having a U-shaped plate 16a at the rear end with a screw a provided on the inner periphery of the tubular front bracket 15. Since the screw b provided on the outer circumference of 16 is connected to be screwed, the rear bracket
16 is rotatable, and the flange 15a protruding from the outer periphery of the front portion of the front bracket 15 is fixed to a mounting plate 18 with bolts 17 ...
Thus, the connecting case 20, 20 is fixed to the rear surface of the rear bracket 16 by a U-shaped plate 16a.

Further, an outer hole 21 is formed in a side portion of the front bracket 15, an inner hole 22 is formed in an upper portion of the rear bracket 16, and the outer hole 21 is formed.
The inner hole 22 is offset by 90 degrees as shown in FIG.

In the tractor described above, when the rotary cultivator is installed as shown in FIG. 1, the rear bracket 16 is set in a posture in which the connecting members 20, 20 project left and right as shown in FIG. 1 and FIG. The hitch pin 12 of the cultivator 3 is fitted to the coupling gold 20,20 and the sleeves 23,23 are inserted in the rear part thereof, and the coupling pins 25,25 are connected to the coupling gold 20,20 and the sleeves 23,23.
Insert it into the hole.

In addition, when attaching a goat or plow by a three-point link, when the rear bracket 16 is rotated 90 degrees as shown in FIG. 3, an inner hole 22 formed in the rear bracket 16 is formed in the front bracket 15. Since they coincide with the holes 21, one of the connecting pins 25 is inserted into the holes 21 and 21 as shown in FIG. 3 and the inner end is stopped by a spring pin or the like.

In this state, the connecting members 20, 20 are located directly above and below the PTO shaft 2, that is, at the upper and lower positions in the center of the machine width, as shown in FIGS. 3 and 4.

Then, the front parts of the left and right lower links 26, 26 are axially attached to the lower link brackets 27, 27 on both sides of the mission case 1 and the check chains 28, 28 are attached so that the working machine can be attached to the tractor by the three-point link. At this time, the connecting metal 20,20 does not project to both sides of the rear bracket 16, and the working machine that can secure a sufficient space between the rear bracket 16 and the lower links 26,26 swings to the left and right. Even if the lower link 26 does not come into contact with the rear bracket 16, the predetermined work can be performed accurately.

(G) Effect of the Invention As described above, the present invention is a tractor for mounting a working machine on the rear portion of the mission case 1 via the mounting brackets 13 having connecting gold on both sides, and
Cylindrical front bracket 15 attached to the mission case 1
And the front side bracket 15
And a rear bracket 16 rotatably engaged with
The rear bracket 16 and the front bracket 15 have approximately 90
Since the rear bracket 16 is deviated and the rear bracket 16 is rotated by approximately 90 degrees, holes 21 are formed to coincide with each other, and pins or the like are inserted into the holes to hold the connecting metal in the upper and lower positions. ,
When mounting a work machine that swings in the lateral direction like a go or plow with a three-point link, a mounting bracket for the two-point link
Rear bracket 16 without removing 13 as before.
By rotating the bracket about 90 degrees, the connecting members 20, 20 of the rear bracket 16 can be easily retracted from the left and right sides to the upper and lower parts of the intermediate part. Even when the mounting bracket is mounted, the lower link 26 and the rear bracket are attached. It is possible to prevent interference with the 16 connecting gold 20.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view showing a state in which a rotary tiller is attached to the rear part of a tractor, and FIG. 2 is a view taken along the line AA in FIG. The figure is a view of the same as above, with the rear bracket rotated by 90 degrees. Fig. 4 is a plan view of a state in which a lower link is attached to mount a working machine by a three-point link system. Fig. 5 is a target example of the same. It is a top view. 1 ・ ・ Mission case, 2 ・ ・ PTO shaft, 3 ・ ・ Rotary tiller, 13 ・ ・ Mounting bracket, 15 ・ ・ Front bracket, 16 ・ ・ Rear bracket, 20 ・ ・ Coupling metal, 21,22
..Hole, 25, connecting pin

Claims (1)

[Scope of utility model registration request] 1. A tractor for mounting a working machine on a rear portion of a mission case 1 via mounting brackets 13 having connecting gold on both sides, wherein a tubular front bracket having the mounting bracket 13 mounted on the mission case 1. 15 and a rear bracket 16 that has connecting metal 20, 20 on both sides and is rotatably engaged with the front bracket 15, and the rear bracket 16 and the front bracket 15 have approximately 90 The holes 21 and 22 are formed so as to be coincident with each other when the rear bracket 16 is rotated by about 90 degrees, and pins are inserted into these holes to hold the connecting metal in the upper and lower positions. A work implement mounting device for a tractor.