JPH0323042Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a riding rice transplanter in which a planting machine is configured to be movable up and down via a parallel link mechanism at the rear of a tractor-shaped body.

In this type of riding rice transplanter, even when the machine body is tilted from side to side or when the mud surface is tilted from side to side, the planting work machine is moved forward and backward so that it can reliably follow the planting mud surface. The planting machine is swingably connected via the shaft, but with this configuration, when the planting machine is lifted up when changing direction at the edge of the field or driving on the road, the machine can freely move. This causes the aircraft to oscillate, significantly impairing the stability of the aircraft and hindering its flight.

In order to eliminate the above-mentioned drawbacks, it has been proposed to provide a device that fixes the swing when the planting machine is raised; It was supposed to be fixed by touching it, but because this fixing device is not flexible, when the planting work machine swings and fixes it as it rises, it receives a shock, and the stored seedlings on the seedling stand fly out, and the seedlings also get damaged. The length of the buffer spring installed between the lifting cylinder and the link mechanism changes depending on the amount of seedlings stored on the platform, and the swinging is fixed sufficiently even though the lifting cylinder is operating to the highest position of the planting machine. It had the disadvantage that it was not carried out.

This invention aims to solve these drawbacks.
That is, in a riding rice transplanter having a planting machine configured to be able to be raised and lowered by means of a lifting link constituted by one upper link and a pair of lower links,
The planting work machine is configured to be able to swing left and right via a swing shaft with respect to the connecting link that connects the rear ends of the upper and lower links, and the lower link is configured integrally with the planting work machine and when the planting work machine is raised. By providing a member that comes into contact with and prevents the above-mentioned swinging, and by constructing this swing-preventing abutting portion from an elastic member, the following effects have been achieved.

Since the planting machine can be fixed elastically when it swings as it rises, the impact is alleviated when the machine swings and fixes, which prevents the stored seedlings on the seedling platform from flying out or being disturbed. There is no fear.

Even if the length of the buffer spring installed between the lifting cylinder and the link mechanism changes depending on the amount of seedlings stored on the seedling platform, the swinging fixing part remains in elastic contact, so the range of swinging fixation is fixed. This allows for reliable rocking fixation and prevention of damage to related parts.

Since the swing is fixed by contacting the two lower links with the contact part provided on the planting machine, the swing can be fixed at a position away from the swing axis, and the structure is simple and can be performed reliably. .

This will be explained below using an example shown in the figure.
In Fig. 1, reference numeral 1 denotes a tractor-shaped body with a control section 2 at the top and a pair of left and right front wheels 3 and rear wheels 4 at the bottom; 5 a link mechanism installed at the rear of the body; The mechanism includes an upper link 6 whose front end is pivotally connected to the fuselage frame, a pair of left and right lower links 7, whose front ends are also pivotally connected to the fuselage frame, and a connecting link 8 that connects the rear ends of the upper and lower links. The link mechanism is a parallel link mechanism in which the quadrilaterals connecting the pivot points of the upper and lower links to the frame and the connection points with the connecting links always form a parallelogram, and one end is connected to the aircraft body. Lift-up cylinder 9 pivoted to
The rod at is connected to an arm 11 fixed to the front end of the upper link 6 via a buffer spring 10, so that when the rod is extended, the entire mechanism moves from the lower position shown by the solid line in FIG. 1 to the position shown by the chain line. It is configured to be able to swing to the upper position. Reference numeral 12 denotes a planting work machine connected to the machine body 1 via the link mechanism 5, and the work machine has a drive device 14 into which power is introduced from the machine body through an input shaft 13, and moves left and right by the output of the device. Seedling stand 1
5 and a planting claw 16 etc. which are similarly operated by the output of the drive device, and a float 17
It is designed to be held on the planting mud surface. Here, as shown in an enlarged view in FIG. 2, a swing shaft 18 that does not rotate with respect to the drive device 14 is projected forward, and this shaft is attached to the lower end of the connecting link 8 in the link mechanism. By being rotatably fitted into a fixed sleeve-shaped bearing member 19, the planting machine is supported so as to be swingable left and right with respect to the link mechanism 5 or the machine body 1.

Reference numeral 26 denotes a boss fitted to the tip of the swing shaft 18 and fixed by a nut 21. Parallel grooves 26a, 26a are formed on the upper and lower peripheral surfaces of the boss, and 20 is a line. The upper and lower sides 20b, 20b of the elliptical winding portion 20a formed in the center of the member are respectively engaged with the grooves 26a, 26a of the boss. It is fixed to the swing shaft via the boss, and when the work machine is lifted up, both left and right ends of this member come into contact with the receiving members 22, 22 fixed to the lower links 7, 7, so that the work machine swings. It is designed to elastically prevent the Here, it is also possible to use a plate-shaped elastic material as the rocking prevention member.

According to the above configuration, when the planting work machine 12 is at the planting position held on the planting mud surface by the float 17, the swing prevention member 20 separates from the lower links 7, 7 in the link mechanism 5. Because I'm doing it,
The work machine can swing from side to side relative to the machine body 1 or the link mechanism 5 around the fitting part between the sleeve 19 and the swing shaft 18, so that even if the machine body is tilted, planting work can be carried out. The machine is held horizontally on the mud surface, and each row of seedlings is planted at the required planting depth. However, when changing direction at the edge of a field or driving on the road, the link mechanism 5 is activated by operating the lift-up cylinder 9.
When the planting machine 12 is lifted up through the support members 22, 2, both ends of the swing prevention member 20 are fixed to the lower links 7, 7.
2, the planting work machine is prevented from swinging from side to side about the swing shaft 18, and therefore the work machine is fixed to the machine body, and the work machine is not allowed to move. This will prevent the center of gravity from shifting due to free rocking of the aircraft, and the resulting instability of the aircraft. Here, since the rocking prevention member 20 is directly fixed to the rocking shaft 18 which serves as a reference for attaching the link mechanism 5 in the planting machine 12, the positional relationship between the member and the link mechanism can be set with high precision. As a result,
This ensures that the work equipment is accurately fixed at the required height when lifted up. Also,
Since a buffer spring 10 is interposed between the link mechanism 5 and the cylinder 9 that raises it,
This means that the impact when the lower link 7 and the swing prevention member 20 come into contact with each other during lift-up of the work machine is alleviated.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a rice transplanter showing an embodiment of the present invention, Fig. 2 is an enlarged side view of the main parts of the embodiment, and Fig. 3
The figure is a longitudinal sectional front view taken along the line of FIG. 2. DESCRIPTION OF SYMBOLS 1... Body, 5... Parallel link mechanism, 7... Lower link, 8... Connection link, 9... Lift-up cylinder, 12... Planting work machine, 14... Drive device, 18... Rocking Shaft, 19...Bearing member, 20
...Swinging prevention member.

Claims (1)

[Scope of utility model registration request] In a riding rice transplanter that has a planting machine that can be raised and lowered by means of a lifting link consisting of one upper link and a pair of lower links, a swing axis is attached to the connecting link connecting the rear ends of the upper and lower links. The planting work machine is configured to be swingable through the planting work machine, and a member is provided that is integrated with the planting work machine and comes into contact with the lower link when the planting work machine is raised to prevent the above rocking. A riding rice transplanter characterized in that a motion-preventing contact portion is made of an elastic member.