JPH076734Y2 - Drive operation structure of rice transplanter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention connects a seedling planting device to a rear part of a traveling machine body through a link mechanism so that the planting device can be freely moved up and down, and is used for raising the seedling planting device. Accordingly, the present invention relates to a traveling operation structure of a rice transplanter in which the link mechanism and the main transmission are linked to automatically reduce the speed of the traveling main transmission.

[Conventional technology]

In the above-mentioned traveling operation structure, in the past, for example, the actual development 62
As disclosed in Japanese Patent No. 169916, in addition to interposing a rotating cam member that forms an operation interchange to the deceleration operation side in the middle of the linkage between the tension arm and the speed change lever of the belt continuously variable main transmission, With the upward swing of the link mechanism, the rotating cam member is forcibly abutted and rotated to automatically decelerate, and the power of the main transmission is transmitted through a manual shift type gear transmission mechanism. It was configured to tell the wheels.

[Problems to be solved by the device]

In the above conventional structure, when turning on a headland while traveling with seedlings, the wheels run while pushing on the mud, so the traveling resistance becomes large and a large traveling driving force is required, so the vehicle speed is automatically reduced. Therefore, the driving force is increased to smoothly turn the vehicle. In particular, since unskilled persons are dangerous to turn at high speed, turning at a low speed is taken into consideration for safety in running.

However, in some fields, the running resistance during turning may be relatively small, and if a skilled worker who is capable of high-speed turning runs forcibly turns at low speeds, the work efficiency may be reduced. However, in the above-mentioned conventional structure, when the seedling planting device is moved up, the device is decelerated each time, so there is a drawback that the work efficiency is poor.

In such a case, it may be possible to manually increase the speed, but it is dangerous to operate the lever by hand during turning.
Improvement in this respect was desired.

The present invention aims to solve the above-mentioned problems.

[Means for Solving the Problems]

The feature of the present invention is that in the traveling operation structure of the rice transplanter described at the beginning, the deceleration return state is provided with the speed change pedal that operates the auxiliary transmission device interposed in the traveling transmission system to the speed increasing side in response to the depression operation. It has the following features and effects.

[Action]

When automatic deceleration is performed by the linkage between the link mechanism and the main transmission during turning, it is possible to perform turning at high speed by depressing the speed change pedal and increasing the speed of the auxiliary transmission. Become. When the stepping operation is released, the speed change pedal is decelerated and returned to the original automatic deceleration state.

[Effect of device]

Therefore, according to the present invention, the driving resistance is small in the field and there is a margin in the driving force without slowing the turning traveling speed.
When an expert who is capable of turning and steering at high speed is to work, he or she can turn at a high speed by stepping on the speed change pedal, which improves work efficiency.

Moreover, since it is a foot-operated type, there is no hindrance to the steering wheel turning operation, and deceleration and recovery can be achieved by releasing the foot, so that safety in traveling operation can be secured.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 4 shows a riding type rice transplanter according to the present invention. In this rice transplanter, a seedling planting device (4) is connected to a rear portion of the riding type traveling body (1) via a link mechanism (3) that is vertically moved by expansion and contraction drive of a hydraulic cylinder (2).
The fertilizer application device (5) is attached to the rear of the seedling planting device (4).

The traveling vehicle body (1) has an engine (7) mounted in a front hood (6) and front and rear wheels (9), (10) below a rear side of the engine (7) via a mission case (8). ) To drive the vehicle.
Further, a control section (11) is arranged on the upper part of the machine body, and a spare seedling storage table (12) is arranged on both left and right sides of the bonnet (6).

The rear support columns (13) and (13) of the left and right preliminary seedling storage bases (12) and (12) are extended upward, and the traveling body (at the upper end of the support columns (13) and (13) ( 1) and a ceiling hood (14) covering the upper part of the planting device (4) are pivotally connected. Further, the rear side of the ceiling hood (14) and the transmission case (15) which also serves as a frame of the seedling planting device (4) are pivotally connected by a rear side column (16) to provide the seedling planting device (4). ) Is in the lower planting position, the ceiling hood (14) is configured to be maintained in a substantially horizontal position, and the seedling planting device (4) is also provided.
The ceiling hood (14) is also configured to swing around the fulcrum on the front side so that the rainwater stored in the upper part can be discharged by swinging up. In this way, the worker can work not only during planting work but also during fertilizer replenishment work without getting wet with rain.

Next, the transmission structure will be described.

As shown in FIG. 2, a split pulley type drive pulley (18) mounted on the sideways output shaft (17) of the engine (7).
And the driven pulley (26) attached to the input shaft (19) of the mission case (8), the transmission belt (21) is wound around, and the transmission belt (2) is operated by operating the main shift repeller (22).
The belt continuously variable main transmission (24) is configured by providing a tension pulley (23) that presses 1) to change the winding diameter on the drive side. Then, the horizontal axis (P) is inserted in the middle of the linking between the main shift repeller (22) and the tension pulley (23).
A rotating cam member (25) that is rotated around is interposed. The rotating cam member (25) has a main transmission repeller (22).
Even when the plant is operated to the high speed side, the operation pin (38) provided on the link mechanism (3) comes into contact with the upward movement of the seedling planting device (4) and forced to the low speed side. A rotatable interchange (26) is formed. That is, when the planting traveling is performed at a high speed, if the seedling planting device (4) is lifted for headland turning, the plant is forcibly switched to the decelerating state, and after turning, the seedling planting device (4) is lowered. When it is done, it is configured to return to the original high speed setting state.

Further, in the mission case (8), an auxiliary transmission device (27) capable of shifting gears at an acceleration rate equivalent to the deceleration rate in the forced deceleration is interposed in the machine body transmission system. The speed change pedal (28) for operating the (27) to the speed increasing side is provided in the deceleration return state. That is, the first
As shown in the figure, a pair of large and small drive gears (30) and (31) are fixedly attached to the drive side shaft (29) in the mission case (8) and the driven side shaft (32) is driven with a large diameter. A shift gear (33) in which a small-diameter driven gear portion (33a) that engages with the gear (30) and a large-diameter driven gear portion (33b) that engages with the small-diameter drive gear (31) are integrally connected to each other is spline-fitted to allow shift operation. Thus, the sub transmission (27) is configured.

When the fork (34) and the speed change pedal (28) are interlockingly connected, the speed change pedal (28) is biased upward by the spring (35), and the speed change pedal (28) is positioned at the upper side. When the auxiliary transmission (27) is operated to the low speed side and the transmission pedal (28) is depressed, the auxiliary transmission (27) is switched to the high speed side.

As shown in FIG. 3, the speed change pedal (28) is arranged on the right side of the driving section step (36) on the side of the side clutch pedals (37a) and (37b) so that the running resistance in the field is reduced. When turning when it is large, the side clutch pedals (37a) and (37b) are operated for reliable turning, and when turning when the running resistance is small, the speed change pedal (28) is operated. It is constructed so that it can be turned at high speed and can be operated selectively.

The sub transmission (27) may have a structure capable of continuously increasing the speed.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 shows an embodiment of a traveling operation structure of a rice transplanter according to the present invention, FIG. 1 is a view showing an operation linking structure of essential parts, FIG. 2 is a side view showing a main shift running operation linking structure, and FIG. Is a plan view of the control section, and FIG. 4 is an overall side view of the rice transplanter. (1) …… Running machine, (3) …… Link mechanism, (4)…
... Seedling planting device, (24) ... Main transmission, (27) ... Sub transmission, (28) ... Shift pedal.

Claims (1)

[Scope of utility model registration request] 1. A link mechanism (3) at a rear portion of the traveling body (1).
The seedling planting device (4) is connected to be driven up and down via the above, and the traveling main transmission (24) is automatically decelerated in accordance with the raising operation of the seedling planting device (4). A traveling operation structure of a rice transplanter in which a link mechanism (3) and the main transmission (24) are linked to each other, and an auxiliary transmission (27) interposed in a traveling transmission system is accelerated with a depression operation. The drive operation structure of the rice transplanter in which the gearshift pedal (28) operated to the side is provided for deceleration return.