JPS6310965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a driving mechanism that is provided at the front or rear of a traveling machine body, which includes a driver's seat, a driving unit, and traveling drive wheels disposed at one location in the longitudinal direction of the machine when viewed from the side. The present invention relates to a riding rice transplanter in which a planting device equipped with a float that supports the machine body on the ground is arranged and connected, and the wheels can be height-adjusted and fixed by vertical swinging of a transmission case that supports the wheels.

In such a riding rice transplanter, it is desirable to suppress fluctuations in the front-rear balance as much as possible in order to run stably and improve planting performance such as planting depth, planting posture, and mud pushing. Changes in the front-to-back balance of the machine due to the up-and-down movement of the wheels in response to the plowing depth are unavoidable.
As a result, there are problems that lead to unstable running and a decline in planting performance, and measures to solve these problems are absolutely necessary.

Although it is a walking-type rice transplanter, the technology for correcting the front-rear balance of the machine by configuring the running wheels that can change the height up and down so that they can also change the position forward and back was published in Japanese Utility Model Application Publication No. 50-72621. Already proposed. However, in the walk-behind rice transplanter shown here, the transmission case supporting the wheels, which can swing up and down, has a telescoping structure, and the position of the wheels can be changed back and forth by expanding and contracting the transmission case. Therefore, for example, when the transmission case faces diagonally downward, there is a problem in that the wheels change not only back and forth but also up and down. This problem arises not only because it is difficult to obtain an appropriate front-back balance, but also because when applied to a riding rice transplanter operated by a human on board, the wheel position is repeatedly adjusted to find the appropriate position. This results in the disadvantage that the pilot feels extremely uncomfortable and anxious.

The present invention has been made in consideration of such a situation, and an object of the present invention is to provide a riding rice transplanter that can rationally maintain the longitudinal balance of the machine body.

The present invention has the following structural features. That is, in the riding rice transplanter described at the beginning of the detailed description of the invention, there is provided a mechanism for changing and fixing the front-rear position of the frame, which swingably supports the transmission case, with respect to the main body of the traveling machine along a straight line. It is characterized in that it is configured such that the longitudinal balance of the aircraft can be adjusted by changing the position.

With this configuration, if the longitudinal balance of the rice transplanter fluctuates due to unavoidable causes such as a change of operator, the entire transmission case that supports the wheels can be moved horizontally in parallel, and the position of the transmission case can be changed. Regardless of the situation, the balance can be corrected while keeping the height position of the wheel relative to the main body constant, and unnecessary changes in the vertical height position due to the longitudinal position adjustment described above do not occur at all. Therefore, the front-to-back balance of the machine can be stabilized quickly, and the float of the planting device sinks or rises, which can cause deep or shallow planting, floating seedlings, and mud pushing by the float. The balance is corrected smoothly by maintaining a horizontal position, so the pilot does not feel uncomfortable or anxious.

Hereinafter, embodiments of the present invention will be described based on the drawings. A traveling machine main body 4 includes a pair of left and right driving drive wheels 1, 1 movable on a tiller a, a driver's seat 2, and a driving unit 3. At the front part, a pair of left and right floats 5, 5 are provided which cooperate with the left and right wheels 1, 1 pair to support the aircraft body by contacting the mud surface b, and also level the mud surface where planting is planned. The row planting device 6 is arranged and connected so that it can be swung from side to side around the vertical axis X, and by swiveling the planting device 6 from side to side, it is possible to align the rows to the rows of already planted seedlings, etc. The riding rice transplanter configured as follows is configured as follows.

That is, the wheels 1, 1 and their supporting transmission cases 7, 7, including the differential case [frame] 4A at the rear of the main body 4, which supports these supporting transmission cases 7, 7 behind the wheel axles 1A, 1A. A hydraulic cylinder 8A is provided between the main body 4 portion and the differential case 4A, which is configured to be freely changeable in position back and forth along a straight line, and for changing and fixing the differential case 4A back and forth with respect to the main body 4 portion. The float 5 of the device 6 is attached so as to move up and down with respect to the planting device 6 following ground pressure fluctuations caused by changes in the longitudinal balance of the aircraft, and the float 5 controls the operation of the control valve 8B of the hydraulic cylinder 8A. In conjunction with the vertical movement of the wheels 1, 1, based on the ground pressure detection result of the float 5,
A mechanism 8 is configured to automatically change the position of the support transmission cases 7, 7 and the differential case 4A back and forth so that the ground pressure of the float 5, that is, the longitudinal balance of the aircraft body, is maintained within a set range. Further, the support transmission cases 7, 7 are mounted to the differential case 4A so that the attachment portions to the differential case 4A are fulcrums R, R, and the upper limit is a horizontal position passing through the fulcrums R, R, so that the support transmission cases 7, 7 can swing up and down. By vertically swinging the support transmission cases 7, 7, the height position of the wheels 1, 1 relative to the main body 4 can be adjusted. A hydraulic cylinder 9 and a sensor 10 that swings up and down in accordance with changes in ground pressure caused by changes in the height of the machine body relative to the mud due to changes in the depth of the tiller a are provided, and the sensor 10 swings up and down. By coordinating the operation of the control valve 11 of the hydraulic cylinder 9, the ground pressure of the sensor 10, that is,
The vertical position of the wheels 1, 1 is automatically adjusted so that the height of the aircraft body relative to the mud is maintained within a set range.

[Brief explanation of the drawing]

The drawings show an embodiment of a riding rice transplanter according to the present invention, with FIG. 1 being a side view of the whole, and FIG. 2 being a partially cutaway plan view of the whole. 1... Drive wheel for driving, 2... Driver's seat, 3...
Driving unit, 4... Traveling machine body, 5... Float, 6
...Planting device, 7...Support transmission case, 8...
mechanism.

Claims (1)

[Scope of Claims] 1. The wheels 1 are attached to the front or rear of a traveling machine main body 4 that includes a driver's seat 2, a driving unit 3, and traveling drive wheels 1 disposed at one location in the longitudinal direction of the machine when viewed from the side.
A planting device 6 equipped with a float 5 that supports the machine body on the ground is arranged and connected thereto, and the wheels 1 are configured to be adjustable in height and fixed by vertical swinging of a transmission case 7 supporting the wheels 1. A certain riding rice transplanter is provided with a mechanism 8 that changes and fixes the longitudinal position of the frame 4A, which swingably supports the transmission case 7, with respect to the traveling machine main body 4 along a straight line. A riding rice transplanter characterized in that the front and rear balance of the rice transplanter is configured to be adjustable. 2. The riding rice transplanter according to claim 1, wherein the mechanism 8 is configured to automatically change the position of the support frame 4A back and forth based on the ground pressure detection result of the float 5.