JPH0417604B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention includes a float on the lower side of the rice transplanter main body, the front part of which is supported so as to be movable up and down with respect to the rice transplanter main body, with the rear part as a pivot point, and a transmission equipped on the rice transplanter main body. The wheels are equipped to be able to move up and down via a swing arm that swings up and down using the front part as a rotational fulcrum, and the wheels can be raised and lowered by the vertical movement of the float, and the rice transplanter body is aligned with the rice field standard. This invention relates to a rice transplanter that is controlled to run.

[Conventional technology]

In this type of rice transplanter, if the swing arm rotates significantly downward in a field where the tiller is deep, the center of the wheel will move significantly forward of the rice transplanter body, which may greatly upset the front-to-back balance of the rice transplanter. For this reason, efforts have been made to lower the position of the front pivot point of the swing arm as much as possible. For example, in the device described in Japanese Utility Model Publication No. 58-20082, a recess extending in the front-rear direction is formed in the center of the upper surface of the float, and a rice transplanter is placed in this recess so that the front pivot point of the swing arm is lowered. The wheel support member on the main body side is bulged downward. As a result, the swing arm is swung up and down with the front pivot point as low as possible and the rear wheel pivot point high. The amount of movement of the center back and forth is suppressed.

[Problem to be solved by the invention]

A problem with such prior art is that the level of the front pivot point of the swing arm is restricted by the upper surface of the float and cannot be made sufficiently low. Therefore, by dividing the float into front and rear parts and positioning the front pivot point of the swing arm between the front and rear floats, the front pivot point of the swing arm can be lowered without being restricted by the float. It has also been proposed to do this, but this has the disadvantage of shortening the length of the float and deteriorating float performance. The present invention has been made to solve the above problems.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a float on the lower side of the rice transplanter main body, the front part of which is supported so as to be movable up and down with respect to the rice transplanter main body, with the rear part as a pivot point, and the float is attached to the rice transplanter main body. In a rice transplanter equipped with a transmission that is equipped with wheels that can move up and down via a swing arm that swings up and down with the front part as a rotational fulcrum, the transmission case is connected from the transmission to the base of the It is rotatable in the vertical direction relative to the transmission, and is installed so as to protrude downward from the rear of the aircraft.
The transmission case is characterized in that the front portion of the swing arm is pivotally supported at the distal end portion of the transmission case.

[Effect]

With the above configuration, the rice transplanter of the present invention can lower the position of the front pivot point of the swing arm as much as possible via the transmission case. Even if there is a large rotation, the center of the wheel will not move significantly forward of the rice transplanter body, and the front-rear balance of the rice transplanter will not be greatly disturbed.

【Example】

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 denotes a rice transplanter main body, and this rice transplanter main body 1 is equipped with a float 2 on the lower side, and is located on both left and right sides of the float 2 at approximately the center of the rice transplanter main body 1 in the front-rear direction. A pair of left and right wheels 3
is equipped. The float 2 has its rear part pivoted to the rice transplanter main body 1 near the planting part 4 by a horizontal shaft 5, and its front part can be moved up and down with respect to the rice transplanter main body 1 via a link mechanism 6. I support it. Further, the rice transplanter main body 1 is equipped with an engine 7 at the front, and power is transmitted from the output shaft of the engine 7 to a transmission 9 via a belt transmission system 8. On both sides of the bottom of the transmission 9, the base of a gearbox 10, which is a wheel transmission case on the side of the rice transplanter main body 1, is rotatable with respect to the transmission 9 on both sides of the float 2, and extends backward and downward. It is protruding towards. A front pivot point of a chain case 11, which serves as a wheel swing arm, is pivoted at a position near the lower end of the gearbox 10.
The wheel 3 is pivotally supported on the rear free end side of the chain case 11, and the gear box 10
Traveling driving force is transmitted from the transmission 9 to the wheels 3 via a gear transmission system provided in the transmission 9 and a chain transmission system provided in the chain case 11. In this case, the chain case (i.e., swing arm) 11 is tilted upward and downward, with the front pivot part being low and the rear free end side (the side on which the wheels 3 are pivotally supported) being high. For example,
It is designed to make a large oscillating motion within the range of angles α and β. Such a rocking motion is caused by the above-mentioned chain case 11.
This is realized by operating an interlocking arm 12 provided in the holder by a balance 14 via an interlocking rod 13.
The balance 14 is connected to a hydraulic cylinder 15 as is well known.
The piston rod 16 is connected to the piston rod 16 via an elastic mechanism 17. The float 2 also has a control arm 1 of a hydraulic mechanism 18 provided on the upper part of the transmission 9.
The lower end of the sensor rod 20 descending from 9 is connected. In the figure, reference numeral 21 is a whistle tank, 22 is a handle, and 23 is a seedling planting rod. Furthermore, in the embodiment shown in FIG. 3, the chain case 11 is located outside the gearbox 10, and the wheels 3 are located outside thereof, so the float width must be narrower than the mutual spacing between the wheels. ,
As shown in FIG. 4, by positioning the chain case 11 inside the gearbox 10, the gearbox 1
0 and wheels 3 are lined up, or as shown in Figure 5, by positioning the wheels 3 inside the chain case 11 so that the gearbox 10 and wheels 3 are lined up, the float width can be increased. , improves left and right stability. In such a configuration, during rice planting work, while the float 2 slides on the rice field, the sensor rod 20 is operated by the body load applied to the float 2, and the control arm 19 is operated to control the hydraulic mechanism 18.
The hydraulic cylinder 15 is operated to swing the swing arm (chain case 11) within the range of angles α and β according to the plowing depth, and the wheels 3 are moved against the rice transplanter main body 1.
move up and down. In this case, even if the plowing platform in the field is deep and the free end of the swing arm is lowered considerably, the front pivot point of the swing arm is already at a low position, so the center of the wheel 3 is aligned with the front and back of the rice transplanter main body 1. It is possible to maintain a good front-rear balance without moving significantly. Moreover, the wheel transmission case on the rice transplanter side (gear box 10 in this embodiment) protrudes downward on both sides of the float 2, so there is no need to divide the float into front and back parts, and the float has a specified length. By having this, there is no inconvenience that the float function is impaired.

【Effect of the invention】

As described in detail above, the present invention enables the transmission case to be connected to the transmission case installed in the rice transplanter body.
The swing arm is rotatable and protrudes downward from the rear of the fuselage, and the swing arm is pivoted at the lowest possible position relative to the protruding wheel transmission case, allowing it to swing up and down. The pivot point of the arm can be set low, substantially suppressing the back and forth movement of the wheels, and maintaining the front and back balance of the rice transplanter. Furthermore, unlike conventional floats, there is no need to form a recess in the float or divide it into front and rear sections, so the float function is not impaired.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figure is a side view, FIG. 3 is a front view, and FIGS. 4 and 5 are plan views showing different embodiments. DESCRIPTION OF SYMBOLS 1... Rice transplanter body, 2... Float, 3... Wheels, 4... Planting section, 5... Shaft, 6... Link mechanism, 7... Engine, 8... Belt transmission system, 9...
... Transmission, 10... Gear box (transmission case), 11... Chain case (swing arm), 12... Interlocking arm, 13... Interlocking rod, 14... Balance, 15... Hydraulic cylinder,
16... Piston rod, 17... Elastic mechanism,
18... Hydraulic mechanism, 19... Control arm, 20...
... Sensor rod, 21 ... Seedling tank, 22 ... Handle, 23 ... Seedling planting rod.

Claims (1)

[Scope of Claims] 1. A transformer comprising a float on the lower side of the rice transplanter main body, the front part of which is supported so as to be movable up and down with respect to the rice transplanter main body, with the rear part as a pivot point, and the rice transplanter main body is equipped with a float. In a rice transplanter in which the transmission case is equipped with wheels that can move up and down via a swing arm that swings up and down with the front part as a rotational fulcrum, the transmission case is connected to the transmission case with its base attached to the transmission. On the other hand, it is rotatable in the vertical direction and protrudes downward from the rear of the aircraft,
A rice transplanter characterized in that the front part of the swing arm is pivotally supported at the tip of the transmission case.