JPH0142405Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coupling device for a working machine in a mobile agricultural machine.

In other words, as a conventional example of a mobile agricultural machine configured so that the connecting fitting on the working machine side is fitted to the side-side U-shaped hitch on the main machine side and a connecting pin is inserted to connect the machine, there is a conventional example as disclosed in Japanese Utility Model Publication No. 54-31925. However, since the hitch has a structure in which a cam mechanism is installed on one side of the hitch in the width direction, when connecting the hitch, the adjustment bolts on both sides of the hitch in the width direction must be completely synchronized, otherwise the work equipment side will not move horizontally relative to the machine side. It had the drawback of leaning in one direction.

The present invention relates to an improvement that solves this drawback, and provides that the working machine side can be connected straight to the main machine side in the direction of travel, and can be suitably implemented as a so-called quick hitch.

Next, the embodiment shown in the drawings will be described.

Figure 1 shows a side view of a tiller, which is an example of mobile agricultural machinery. 11, a tail wheel 12, etc. are connected to form the same structure as the conventional structure, but the rear end of both frame plates 13 connected to the rear part of the transmission case 7 is provided with a side U-shaped hit 1. is fixed, and a connecting fitting 2 made of a plate is fixed to the front ends of both frame plates 14 protruding forward from the center in the width direction of the rotary work machine B, so that the hitch 1 and the connecting fitting 2 can be connected detachably. do.

Both side plates 1a having arcuate edges 15 concavely curved toward the rear are fixed by welding to both ends of the hitch 1, and heads 3a are provided at two locations on both sides near the center in the width direction of the hitch 1. Both connecting pins 3
Holes 16a and 16b, into which the components can be inserted from above, are formed in correspondence with the upper and lower surfaces, respectively.

Both side ends of the connecting fitting 2 are bent forward to integrally form both side plates 2a, and the front edges of the both side plates 2a are provided with convex arcuate edges 17 that can match the arcuate edges 15 on the both side plates 1a of the hitch 1. are formed, respectively, and guide plates 18, 18 are fixedly installed on both sides of the hitch 1, respectively, facing the outer surfaces of the both side plates 2a,
Two support rods 19a, 19a, 19b, and 19b are fitted into the top and bottom of two locations on both sides of the connecting fitting 2 so as to be able to slide in the front and rear directions, respectively, and can be fitted into the inside of the hitch 1. The engaging body 4, which has a U-shaped side surface and is formed horizontally so as to span the entire width inside the hitch 1, has four support rods 19a, 19a, 1
The front ends of 9b and 19b are fixed integrally, respectively, and semicircular notches 20a, 20a, 20b into which the connecting pins 3, 3 can be fitted are provided on the edge sides of the upper and lower surfaces, which are two places on both sides of the engaging body 4. , 20b are formed respectively.

In addition, both frame plates 1 that are on the back side of the connecting fitting 2 are provided.
Lateral through holes 21, 21 are respectively formed in the portion 4, and eccentric cam bodies 6, 6 are provided at two locations of the shaft rod 6a which is fitted into the through holes 21, 21 and installed laterally.
are formed integrally with each other, and are installed so that both cam bodies 6 can abut against a contact plate 22 fixed to the back surface of the connecting fitting 2. The upper and lower support rods 19a, 1
9a, 19b, 19b, respectively, and a double nut 24 serving as an adjustment mechanism is screwed into the rear end of each support rod 19a, 19a, 19b, 19b, respectively, and a lever 5 is fitted on one end side of the shaft rod 6a. An integral connecting tube 25 is fitted and fixed, and a stopper 26 that can abut against the back side of the connecting fitting 2 is fixed on the outer periphery of the connecting tube 25.

Therefore, the separated rotary work machine B
When connecting the machine A to the rear of the machine A, as in the conventional case, move the machine A backward and fit the engaging body 4 into the hitch 1 while bringing the hitch 1 closer to the connecting metal fitting 2 as shown by arrow A. At the same time, both guide plates 1
8 and 18, and guide the both side plates 2a of the connecting fitting 2 inwardly to the circular arc edges 15 of the both side plates 1a of the hitch 1.
When the arcuate edges 17 of both side plates 2a of the connecting fitting 2 are fitted until they abut, and in that state, both the connecting pins 3 are inserted into the holes 16a, 16b of the hitch 1 from above as shown by the arrows B. As shown in FIGS. 2 to 5, both connecting pins 3 come close to the notches 20a, 20a, 20b, and 20b of the engaging body 4, and can be connected.

Next, when the lever 5 is rotated as shown by arrow C, the circumferential surfaces of both cam bodies 6 push the connecting fitting 2 toward the hitch 1 via the contact plate 22 as the shaft rod 6a rotates, and the shaft rod 6a is rotated. While pushing the support plates 23a, 23b, the engaging body 4 is drawn toward the connecting pins 3, 3, and the cam bodies 6, 6 are moved until the stopper 26 abuts against the connecting fitting 2, as shown in FIG. 6b. After rotating a little beyond the dead center, the seventh
As shown in the figure, the engaging body 4 is in pressure contact with the connecting pins 3, 3, and the connecting pins 3, 3 are in pressure contact with the hitch 1, and on both sides, the both side plates 1a of the hitch 1 and the connecting metal fittings 2
The side plates 2a of the rotary work machine B are aligned with each other, and the hitch 1 side and the connecting metal fitting 2 side are connected without play, and the rotary work machine B assumes a normal posture in the front and back direction without tilting in the lateral direction. This means that they can be connected.

In addition, by adjusting the screwing of each double nut 24 to each support rod, the degree of engagement and pressure of the engaging body 4 with respect to the connecting pins 3, 3 can be adjusted.

As described above, the present invention provides a mobile agricultural machine configured so that the connecting fitting 2 on the working machine B side can be connected to the side U-shaped hitch 1 on the side of the machine A. Side plate 1 that can collide
a, 2a, respectively, and the connecting pin 3 is inserted into the hitch 1, and an engaging body 4 that can be inserted into the inside of the hitch 1 and engaged with the connecting pin 3.
is connected to the connecting fitting 2 so as to be movable back and forth, and at the rear of the connecting fitting 2 opposite to the hitch 1, there is a cam body 6 which can be rotated by a lever 5, and the engaging body 4 is moved by the cam action. Since it is constructed by interlocking and interlocking so that it can be drawn, it can be quickly used as a so-called quick hit by simply fitting the hitch 1 into the connecting fitting 2 side, inserting the connecting pin 3, and rotating the cam body 6 with the lever 5. Work machine B can be easily connected to machine A, and
In the connected state, both side plates 1a on the hitch 1 side and both side plates 2a on the coupling fitting 2 side match each other on both sides, and the connecting pin 3 on the center side is tightened to prevent play, so that the work machine B can be moved laterally. This means that the connection can be made accurately without tilting, in a normal posture, and without any looseness, which has the advantage of being suitable for implementation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the tiller, Fig. 2 is a side view of the main parts, Fig. 3 is a sectional view taken along the - line in Fig. 5 is a sectional view taken along the - line in FIG. 3, FIGS. 6 a and b are explanatory diagrams of the operation of the cam body, and FIG. 7 is an explanatory diagram of the operation of FIG. 5. FIG. 8 shows an exploded view of FIG. A...This machine, 1...Hitsuchi, B...Work equipment, 2
...Connection fittings, 3...Connection pins, 1a, 2a...
Side plate, 4... engaging body, 5... lever, 6... cam body.

Claims (1)

[Scope of utility model registration request] In a mobile agricultural machine configured such that a side U-shaped hitch 1 on the side of the machine A can be connected to a connecting fitting 2 on the working machine B side, side plates 1a and 2a that can abut each other are provided on both sides of the hitch 1 and the connecting fitting 2. A connecting pin 3 is fitted into the hitch 1, and an engaging body 4 that can be fitted inside the hitch 1 and engaged with the connecting pin 3 is attached to the connecting fitting 2 so as to be movable back and forth. A cam body 6, which can be rotated by a lever 5, is attached to the rear of the connecting fitting 2, which is connected in series and is on the opposite side of the hitch 1, and is interlocked with the cam body 6 so that the engaging body 4 can be drawn by the cam action. A connecting device for a working machine, characterized in that it is configured as follows.