JPH0244645Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a wheel support device for a walking type two-wheeled rice transplanter.

(b) Conventional technology The technology related to a walk-behind single-flower rice transplanter that integrates an engine and a swing case has been developed since the 1970s.
Techniques such as those disclosed in Japanese Patent No. 41777 are known.

In the case of a walk-behind single-wheel rice transplanter, the single wheel can constitute a rolling pivot, so there is no need to separately provide a rolling bending section.

However, in the case of a one-wheeled vehicle, it was difficult to use because it was unstable when being transported on the road and required the operator to firmly support the vehicle by gripping the handle.

This invention has two wheels, left and right.
This compact walk-behind two-wheeled rice transplanter is constructed by providing stability when traveling on the road, and by pivoting the traveling device and the planting device for pitching and rolling.

(c) Problems to be solved by the invention In the case of a walk-behind two-wheeled rice transplanter, the planting device is placed on top of a float and configured to run on a horizontal surface.
The running power is obtained by rotating the wheels while they are in contact with the tiller.

Therefore, the wheels are configured to swing up and down independently of the float and the planting section, and are always in contact with the uneven surface of the tiller while following the unevenness of the tiller.

Conventionally, as shown in Figures 6, 7, and 8, the engine and transmission case were fixed together with the planting device side, and the swing case was configured to be movable up and down relative to the transmission case, so the swing It was not possible to make the case longer, and if the swing case was made longer, the overall length would be longer, and the structure of the connecting part between the transmission case and the swing case would be complicated.

In addition, the engine 1, the transmission case 32, the power transmission case 35, and the planting drive case 6 are fixed in a straight line, and the handle 5 is connected to the planting transmission case.
protrudes and the seedling stand 4 is allowed to slide left and right, so the swing cases 33 of the wheels 8L and 8R are pivotally supported on shafts that protrude from the transmission case 32.
It was designed to be able to rotate around this axis. 3
4 is a float.

In this way, the conventional technology had the disadvantage that if the axle case was lengthened, the overall length of the aircraft would become even longer, and if an attempt was made to make the aircraft shorter than this, it would be impossible to shorten the aircraft due to the length of the swing case. .

Also, swinging the transmission case is structurally very complex and requires many parts.
It also had the disadvantage of being heavier.

In order to eliminate these drawbacks, the present invention solves these problems by integrating the swing case with the transmission case 9 and the engine 1 and configuring these into the swing case.

(d) Means for solving the problems The problems to be solved by this invention are as described above.
Next, we will explain the means to solve the problem.

Integrating engine 1 and transmission case 9,
Axle 2 to the left and right from the rear end of the transmission case 9
The two left and right wheels 8L, 8R are supported by the axles 24, 24, and the pitching pivot shaft 40 is protruded from the transmission case 9 in front of the axles 24, 24. The front end of the power transmission case 3 is pivotally supported by a shaft 40 so as to be movable up and down, and a rolling bending part 26 is provided at the rear end of the power transmission case 3, and the planting drive case 6 can be rotated left and right by the rolling bending part 26. It was supported as possible.

(E) Embodiment The problems to be solved by the present invention and the means for solving them are as described above.Next, the structure of the embodiment shown in the attached drawings will be explained.

Figure 1 is an overall side view of the walking rice transplanter of the present invention.
Figure 2 is a drawing showing the walking rice transplanter of the present invention in its stored state; Figure 3 is a plan view showing the power transmission system;
Fig. 4 is a side view of a bending section configured to allow the planting section to swing left and right to transmit power, Fig. 5 is a side view of the wheel swing section of the present invention, and Figs. 6 and 7 are conventional rice planting sections. A drawing of the wheel swing portion of the machine, FIG. 8 is a side view of a conventional rice transplanter.

As shown in FIGS. 1, 2, and 3, the present invention integrates the engine 1, the transmission case 9, the bevel gear box 16 sandwiched between them, etc. as a swing case, and the transmission case An axle 24 protrudes left and right from both sides of the vehicle 9, and left and right wheels 8L, 8R are fixed to the axles 24, 24.

In conventional walk-behind rice transplanters, the left and right wheels move up and down separately according to the unevenness of the paddy tiller, but in this invention, the swing case is a single transmission case in the center, so the left and right wheels are integrated. It changes and moves up and down.

However, in this case, if the left and right axles tilt according to the unevenness of the tiller in the field, the planting section will also tilt, so a rolling bending section 26 is provided to prevent the planting section from tilting from side to side.

A bevel gear box 16 is provided at the rear of the engine 1, and this bevel gear box converts the rotation of the engine 1 on the front and rear axes to the rotation on the left and right axes. Then, the transmission case 9 is fixedly installed at the rear of the bevel gear box 16. Inside the transmission case 9, a transmission is constructed of a gear sliding type.

Axle 24 to the left and right from the rear end of the transmission case 9
protrudes, and wheels 8L and 8R are fixedly installed. If the left and right wheels 8L, 8R swing up and down at the same time, the axles 24, 24 may come into contact with the lower surface of the power transmission case 3 and may not be able to rise any further. It is configured.

The tips of the power transmission case 3 and the reinforcing plate 23 are pivotally supported by the chassis 10 below the engine 1. The planting section and the power transmission case 3 swing back and forth with respect to the engine 1 and the transmission case 9 around this pitching pivot shaft 40, but conversely speaking, the engine 1 and the transmission case 9 are It pivots around the pivot shaft 40 relative to the power transmission case 3.

The pitching pivot shaft 40 may protrude from inside the mission case 9 as shown in FIG.
As shown in FIGS. 2 and 5, power may be transmitted from the transmission case 9 to the front chassis section 10 via the chain case 15, and the pitching pivot shaft 40 may be provided in this section.

Since the power transmission case 3 has a downwardly curved portion, a counter shaft is provided inside the power transmission case 3, and this portion divides the chain into front and rear parts.

The front chain is wound from sprocket 17 to 18, and the rear chain is wound from sprocket 19 to 20.

The shaft 41 of the sprocket 20 is installed between the power transmission case 3 and the reinforcing plate 23, and the direction of power transmission is changed by bevel gears 21 and 22. A shaft 42 of the bevel gear 22 passes through the inside of the cylindrical body 25 and transmits power to the rolling bending section 26.

A gear 12 is provided at the rear of the shaft 42, and the gear 12 meshes with a gear on a bending shaft 43. The gears 12 and 13 are housed in a transmission case 27 fixed to the cylindrical body 25 side.

A sprocket 28 is provided inside the bent portion shaft 43 on the side of the planting drive case 6, and transmits power to a sprocket 29 at the lower portion. and bevel gear 3
By the combination of 0 and 31, the planting part is configured to be driven by changing the direction of power transmission.

As shown in FIGS. 1 and 2, the float 7
is fixed only from the planting part side, and the wheel side is supported only by wheels 8L and 8R.

A seedling stand 4 is supported on the top of the planting drive case 6,
A float 7 is supported below the planting drive case 6.

The traveling part and the planting part are capable of pitching rotation of the pitching pivot shaft 40 and rolling rotation of the rolling bending part 26, so even if the wheels 8L and 8R shake back and forth and left and right due to the tiller in the field. , there is no effect on the planted area.

Figure 2 shows the state of the present invention when it is stored.
It is supported on the ground by the bumper 14 at the front end and the wheels 8L and 8R, and then the handle 5 is rotated about the pitching pivot shaft 40, the planting drive case 6 and the power transmission case 3 are erected, and the planting is carried out. The stoppers 44, 44 are hooked between the left and right sides of the case 9 and the planting drive case 6, and the planting drive case 6 is closed.
It is fixedly stored so that it does not swing from side to side.

In comparing Figures 5 and 7, in the past, the swing case 33 was provided swingably protruding from the transmission case 32, so the distance from the front end of the engine to the wheels could not be longer. Therefore, the length _t2 of the swing case 33 could not be made any longer. Therefore, the amount of back-and-forth movement _S2 of the wheels during swinging was large, which hindered free swinging.

In the case of the present invention, the distance from the front end of the engine 1 to the pivot shaft 40 is shortened, and as a result, the distance _t1 from the pitching pivot shaft 40 to the axle 24 can be made longer. This allows the axle 24
The longitudinal movement amount S ₁ of the wheel 8 becomes small, and the free vertical movement of the wheel 8 is promoted.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

Firstly, the walk-behind two-wheeled rice transplanter can be configured with front and rear separate supports, which improves the left-right balance when running on the road, which was a drawback of conventional walk-behind single-wheel rice transplanters with front and rear supports. It was possible to eliminate the disadvantages of

Second, even if the front running section rolls left and right due to the unevenness of the tiller, the rolling bending section 26 at the rear can absorb this lateral shaking, so the planting section always slides on the paddy field. The seedlings can be horizontally supported by the float 7, which improves the planting posture of the seedlings.

Third, compared to conventional walk-behind rice transplanters, the structure of the transmission case and axle part is simpler, the number of parts can be reduced, and the weight of the machine can be reduced.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the walking rice transplanter of the present invention.
FIG. 2 is a drawing showing the state of the walking rice transplanter of the present invention when it is stored. FIG. 3 is a plan view showing the power transmission system.
FIG. 4 is a side view of a bending section configured to allow the planting section to swing left and right to transmit power. FIG. 5 is a side view of the wheel swing section of the present invention. Figures 6 and 7 are drawings of the wheel swing section of a conventional rice transplanter. FIG. 8 is a side view of a conventional rice transplanter. 1... Engine, 4... Seedling stand, 6... Planting drive case, 7... Float, 8L, 8R... Wheel, 9... Mission case, 24... Axle, 2
6...Rolling bending section, 40...Pitching pivot shaft.

Claims (1)

[Scope of utility model registration request] Integrating engine 1 and transmission case 9,
Axle 2 to the left and right from the rear end of the transmission case 9
The two left and right wheels 8L, 8R are supported by the axles 24, 24, and the pitching pivot shaft 40 is protruded from the transmission case 9 in front of the axles 24, 24. The front end of the power transmission case 3 is pivotally supported by a shaft 40 so as to be movable up and down, and a rolling bending part 26 is provided at the rear end of the power transmission case 3, and the planting drive case 6 can be rotated left and right by the rolling bending part 26. A walking type two-wheeled rice transplanter characterized by being pivotably supported.