JPS5811964B2 - rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rice transplanter, and more particularly to the structure of a front wheel support of a traveling vehicle body on which a rice transplanter is mounted at the rear.

As a traveling vehicle body for a rice transplanter with a rice transplanting device attached to the rear.
A four-wheel type vehicle is known, and the wheels of this vehicle are usually set to pass between the seedling planting lines.

However, if the plowing depth of the rice planting field is large, that is, if the hard ground is deep, the wheels of the traveling vehicle will enter the mud near the axles, and the lower part of the front wheel support that drives and supports the wheels will enter the rice field, making it difficult to plant seedlings. There was a drawback that the line passed through the line and had a negative impact on the seedling planting work.

Therefore, in the present invention, the lower part of the front wheel support is configured to have a shape and mechanism that prevents the wheel from coming into contact with the seedling planting line even if the wheel enters the cultivated soil close to the axle, thereby adversely affecting the seedling planting work (accuracy). The aim is to provide a rice transplanter that avoids this problem.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the figure, reference numeral 1 denotes a running vehicle body, and this running vehicle body 1 includes a pair of left and right front wheels 2 and a rear wheel 3.
have approximately the same distance between ruts, and are arranged so that they run approximately on the same line when traveling straight, as shown in FIG.

A rice transplanting device 5 is attached to the rear part of the traveling vehicle body 1 via a lift mechanism 4.

The rice transplanting device 5, similar to conventionally known devices, has a frame 6 serving as a transmission case as a base, a float 7 disposed below the frame 6, and a float 7 that is tilted toward the traveling vehicle body 1 and supported so as to reciprocate in the left and right direction. The seedling tank 8 has a seedling tank 8 and a planting body 9 which is provided so as to move up and down in opposition to the inclined lower end of the seedling tank 8. The structure is such that the mat-shaped seedlings are taken out one by one from the seedling take-out port and planted on the rice field, and in the present invention, five planting bodies 9 are provided.

As shown in FIG. 2, the front wheels 2 and rear wheels 3 are spaced so that the middle three rows of the five seedling planting lines PL fall within the ruts.

The front wheels 2 are supported by front wheel supports 12 attached to both ends of a transmission case 11 that has a differential portion 10 in the center and extends left and right.

A propeller shaft 13 from the traveling vehicle body 1 is connected to the differential portion 10, and the left and right transmission cases 1 are connected via a differential (not shown).
Power is transmitted to a rotating shaft 14 mounted inside the rotary shaft 1.

Further, the differential section 10 is mounted between a pair of front and rear support members 15 protruding downward from the traveling vehicle body 1 so as to be vertically rotatable (rolling) via a center pivot 16. It is connected to the differential section 10 by passing through the rear part of the shaft.

As shown in FIGS. 2 and 3, the front wheel support 12 includes a transmission case 17 that is integrally connected to the transmission case 11 and bent in a key shape, and a bearing section 18 at the bottom of the transmission case 17. The steering part case 20 is fitted so as to be rotatable in a substantially horizontal direction via a thrust bearing 19 and is formed to cover the lower part from the side of the transmission part case 17. The steering section case 20 houses a bevel gear 21 fixed to the rotating shaft 14 and a counter shaft 23 fixed to one end thereof and extending downward, with a bevel gear 22 meshing with the bevel gear 21 fixed to the rotating shaft 14. Bevel gear 24 fixed to the other end of countershaft 23
and a bevel gear 25 that meshes with this bevel gear 24,
It houses an axle 26 on which the front wheel 2 is mounted.

The steering unit case 20 has a recess 27 formed on its inner surface that pivotally supports the axle 26 .

This recess 27 is close to the seedling planting line PL as shown in FIG.
It is designed not to touch the seedling planting line PL4.

Further, the two steering section cases 20 are connected by a tie rod 28, and a knuckle arm 29 is attached to the upper part of one of the steering section cases 20, and is linked to a steering handle 30 of the traveling vehicle body 1.

The rear wheels 3 are provided on both sides of the traveling vehicle body 1, and are attached to the rear end of a transmission case 31 that is longitudinally elongated.
It is designed to be driven together with the front wheels 2.

The rice transplanter having such a configuration uses the traveling vehicle body 1 which drives the four wheels, the front wheels 2 and the rear wheels 3, to move the rice transplanting device 5.
A float 7 is slid in contact with the rice field surface, and a planting body 9 is used to plant five seedlings at a time.

At this time, if the cultivated soil in the field is deep and the depth from the field surface to the hard platen is large, the front wheels 2 and rear wheels 3 of the traveling vehicle body 1 will go deep into the cultivated soil until they come into contact with the tiller. However, in the present invention, Since the front wheel support 12 of the front wheel 2 forms a concave portion 27, even if the front wheel 2 enters into the cultivated soil close to the axle 26, the seedlings will not be thrown into the circular surface. does not have a negative effect on the planting condition (accuracy).

As explained above, according to the rice transplanter of the present invention, the inner lower end of the front wheel support 12 that supports the front wheels 2 of the traveling vehicle body 1 is
The lower part of the front wheel support body 12 is recessed from the upper part to the lower end of the axle 26 of the front wheel 2 so as to prevent the inner lower end part from sinking into the soil on the rear seedling planting line PL.

Therefore, even if the rice transplanter runs in a field with a deep tiller and the front wheels sink into the soil, the lower end of the front wheel support will be on the seedling planting line or the seedling planting line. The soil surface at a position close to the front wheel is not roughened by scraping a wide area, and therefore, there is no adverse effect on the planting of seedlings on the seedling planting line corresponding to the traveling trajectory of the front wheels.

In the above embodiments, the present invention was applied to the front wheels of a four-wheel drive type vehicle body, but it can be similarly applied to a type of vehicle body that does not drive the front wheels but drives only the rear wheels. It is.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a side view of the entire rice transplanter, and Fig. 2 is a front view showing the relative position between the wheels of the traveling vehicle and the planting line of the seedlings planted by the rice transplanter. figure,
FIG. 3 is a longitudinal sectional view of the main part. 1... Traveling vehicle body 42... Front wheel, 3... Rear wheel, 4... Lift mechanism, 5... Rice transplanting device, 6... Frame, 7... Float, 8... Seedling tank, 9... Planting body , 10... differential section, 11... transmission case, 12... front wheel support, 13...
Propeller shaft, 14... Rotating shaft, 15... Support member, 16... Center pivot, 17... Transmission part case, 1
8... Bearing section, 19... Thrust bearing, 20...
Steering unit case, 21, 22...bevel gear, 23...counter shaft), 24, 25...bevel gear, 26...
Axle, 27... recess, 28... tie rod, 29... knuckle arm, 30... steering bundle, 31... transmission case.

Claims (1)

[Claims] 1. A rice transplanter equipped with a rice transplanting device in which a plurality of seedling planting mechanisms are arranged in parallel in the width direction on the rear part k of a four-wheeled running vehicle body with a pair of left and right front wheels and rear wheels, and the above-mentioned rice transplanting device In a vehicle in which the front wheels pass in front of the rows of seedlings to be planted, the front wheel support that supports the left and right front wheels has its inner lower end extending from the upper part of the axle support position of the front wheel to the lower end. It is recessed and formed in the middle of the lower part of the front wheel support.
The rice transplanter is configured such that the inner lower end portion is not thrown into the soil on the rear seedling planting line.