JPS6310321Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a riding-type rice transplanter or a tractor, etc., and various working machines such as a seedling planting device or a tiller can be detachably connected to the running body of the vehicle with a single touch operation. This relates to hitch devices.

Conventionally, this type of hitch device was connected by aligning a hole in a member protruding from the vehicle body with a hole in a member on the work equipment side and inserting a pin into the hole, but this method In this case, the actuator must be moved up and down or left and right to align the holes, which is extremely difficult and requires a considerable amount of effort to connect.
Since a play must be provided to facilitate the insertion of the pin, the backlash causes noise due to the play.

In this invention, positioning is achieved by hooking a hook provided on the working machine side onto a pin provided on the traveling vehicle body side, and a hook lever provided on the working machine side is moved toward the traveling vehicle body side by rotating the lever handle. By hooking it onto another pin and fastening it, the working machine can be connected extremely easily with one-touch operation without rattling.

Hereinafter, an embodiment in which the present invention is applied to a riding-type rice transplanter will be described.
It consists of two front wheels 3 attached to the front lower surface and two rear wheels 5 attached to the rear lower surface via chain cases 4, 4, and a control seat 6 and a steering handle 7 on the upper surface of the body frame 2. The vehicle moves forward using an engine 8 mounted on the front upper surface of the vehicle body frame 2.

Reference numeral 9 denotes a seedling planting device located at the rear of the traveling vehicle body 1, and the seedling planting device 9 includes a transmission case 10, planting cases 11, 11, 11 attached at appropriate intervals from the transmission case 10 in the lateral direction; It consists of floats 12, 13, 12 attached to the lower surface of the planting case and a seedling stand 14 whose upper end is inclined so as to approach the traveling vehicle body 1. At the rear end of each planting case, a vertically swinging type of seedling is placed. A mechanism 15 is provided.

The base ends of a pair of left and right lower links 16, 16 of equal length are rotatably attached to the rear lower surface of the traveling vehicle body 1, and the base end of one top link 17 is rotatably attached to the rear upper surface. , 16 and the joint bodies 18, 18 disposed on the left and right sides of the tip of the top link 17 are connected by a pair of upper and lower pin shafts 19, 20, and the tip of the top link 17 is connected to the upper pin shaft 19. , the tips of both lower links 16, 16 of the lower pin shaft 20 are rotatably connected, and a pair of upper and lower hitch pins 21, 22 are mounted between the joint bodies 18, 18, while the seedling planting device 9 A rolling shaft 24 is provided on the side surface of the transmission case 10 on the traveling vehicle body 1 side at a position on the plane center line of the traveling vehicle body 1.
A bracket plate 23 is attached to the bracket plate 23, and a hit body 25 formed in a U-shape in plan is rotatably covered on the rolling shaft 24 of the bracket plate 23, so that it can be inserted between the two joint bodies 18, 18. Fit it,
The front surfaces of the left and right side plates 26, 26 of the hit body 25 are provided with downward hook portions 27, 27 on the upper part to be hooked on the upper hit pin 21, and recesses 28, 28 on the lower part into which the lower hit pin 22 can be fitted. A hit shaft 29 is rotatably supported between the left and right side plates 26, 26 of the hit body 25 in parallel with both hit pins 21, 22, and a lever handle 30 is fixed to one end of the hit shaft 29, so that the lever The hitch shaft 29 is configured to be rotated by the handle 30, and the hitch shaft 29 between the side plates 26, 26 is configured to rotate.
are provided with eccentric cams 31, 31, and hook levers 32, 32 which are hooked on the lower hitch pin 22 are rotatably fitted onto the eccentric cams 31, 31. 32 are connected via a pipe 33 so that they can rotate at the same time,
A pin 34 protruding outward from one end of one of the lever handles 32 and a pin 35 protruding outward from the lever handle 30 are provided when the lever handle 30 is rotated toward the seedling planting device 9 side. Both foot levers 32, 32 are biased in a direction in which they are hooked on the lower hitch pin 22, and when the lever handle 30 is rotated in the opposite direction to the seedling planting device 9, both foot levers 32, 32 are moved in a direction in which they are removed from the lower hitch pin 22. Equipped with springs 36 each biased,
In addition, the eccentric direction of both the eccentric cams 31 is set such that the lever handle 30 approaches the hitch shaft 29 when the lever handle 30 is rotated toward the seedling planting device 9. When rotated in the opposite direction to 9, both foot levers 32, 3
2 are configured to move in the direction away from the hit shaft 29.

Note that a lifting hydraulic cylinder 37 for raising and lowering the seedling planting device 9 is provided between the traveling vehicle body 1 and the top link 17, and both lower links 16,
A stopper rod 38 having a U-shaped planar shape is fixed to the tip of the seedling transplanter 16, and when the seedling planting device 9 is raised to the highest position, the stopper rod 38 comes into contact with a contact portion 39 fixed to the bracket plate 23. It is set not to rise any further. Furthermore, a rolling buffer mechanism 40 against rolling motion of the seedling planting device 9 is provided between the hit body 25 and the bracket plate 23. This rolling buffer mechanism 40 includes a pin 41 embedded in the bracket plate 23, and a pin 41 embedded in the bracket plate 23.
Horizontal rod 4 pivoted to swing like a seesaw on the
2, and a pair of left and right compression springs 45, 45 inserted between nuts 43, 43 at both ends of the horizontal rod 42 and receiving plates 44, 44 protruding from the hit body 25. Further, the rear end portions 46, 46 of both the joint bodies 18, 18 are connected to the hit body 25 inside thereof.
It is bent outward to facilitate insertion. Further, a stopper 47 is provided on the outer surface of one of the joint bodies 18, with which the lever handle 30 comes into contact when the lever handle 30 is rotated in the outward direction of the hitch.

In this configuration, from the traveling vehicle body 1 to the seedling planting device 9
In order to separate the lever handle 30 from the position on the side of the seedling planting device 9, rotate the lever handle 30 in the forward direction, that is, toward the traveling vehicle body 1 side. , 32 are moved forward by the rotation of the eccentric cams 31, 31 and loosened, while the line of action of the spring 36 mounted between the lever lever 32 and the lever handle 30 is on the front side of the center of the hitch shaft 29. By shifting to this spring 36, both foot levers 32, 32
The force automatically rotates upward and separates from the lower hitch pin 22 (in this state, the pins 34 protruding from both foot levers 32 are brought into contact with the joint body 18 and positioned), so from now on, seedlings cannot be planted. The seedling planting device 9 can be separated from the vehicle body 1 by lifting the device 9 slightly and removing the hook portion 27 from the upper hitch pin 21.

To connect the seedling planting device 9 to the traveling vehicle body 1, hook the hook part 27 on the upper part of the hitch body 25 onto the upper hitch pin 21, and fit the lower hitch pin 22 into the recess 28 at the bottom. By rotating the lever handle 30 toward the seedling planting device, the line of action of the spring 36 shifts to the rear of the hitch shaft 29, so that the foot levers 32, 32
6 force automatically rotates downward and hooks on the lower hitch pin 22, and at the same time, both foot levers 32, 32 are rotated by the rotation of the eccentric cams 31, 31 on the hitch shaft 29.
is pulled rearward, so that the hit body 25 is strongly fastened to the joint bodies 18, 18 to complete the connection, and in this connected state, the foot lever 32 is pulled against the lower hit pin 22 by the force of the spring 36. Because the hung state is maintained,
As long as the lever handle 30 is not rotated, the connection will not come off and the connection can be made reliably and firmly without any play.

In addition, contrary to the above embodiment, the joint body 18 having a pair of upper and lower hitch pins may be provided on the seedling planting device 9 side, and the hitch body 25 may be provided on the traveling vehicle body 1 side.

Therefore, according to the present invention, a working machine such as a seedling planting device can be connected to the traveling vehicle body with a single touch, and the labor required for connection and separation can be significantly reduced. It has the effect of not emitting noise due to the attachment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a riding rice transplanter, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a side view of a riding rice transplanter.
The figure is a longitudinal sectional front view of the connecting part of the seedling planting device to the traveling vehicle body, FIG. 4 is a sectional view taken from the side shown in FIG. - It is a sectional view. 1... Running vehicle body, 2... Vehicle body frame, 3...
Front wheel, 5... Rear wheel, 9... Seedling planting device, 18... Joint body, 21, 22... Hitchi pin, 25... Hitchi body, 27... Hook portion, 28... Recess, 29...
... hitch shaft, 32 ... foot lever, 31 ... eccentric cam, 30 ... lever handle, 36 ... spring.

Claims (1)

[Scope of utility model registration request] In an agricultural machine in which a working machine is detachably connected to a traveling body, a joint body having a pair of upper and lower hitch pins is attached to one traveling body or working machine side, and a hitch body is attached to the other working machine or traveling body side, and the hitch body is attached to the front upper part of the hitch body.
a hook portion for hooking onto the upper hitch pin of the pair of upper and lower hitch pins, a hitch shaft rotated by a lever handle is journalled on the lower part of the hitch body, a hook lever for hooking onto the lower hitch pin of the pair of upper and lower hitch pins is rotatably fitted onto an eccentric cam fixed onto the hitch shaft, and a spring is mounted between the hook lever and the lever handle so as to urge the hook lever in a direction to hook onto the lower hitch pin when the lever handle is rotated in one direction, and to urge the hook lever in a direction to disengage from the lower hitch pin when the lever handle is rotated in the other direction; and the eccentric direction of the eccentric cam is configured so that the hook lever moves towards the hitch shaft when the lever handle is rotated in one direction, and moves away from the hitch shaft when the lever handle is rotated in the other direction.