JPS6234828Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention locates the input shaft of the transmission connected to the front wheels at the rear of the aircraft body than the output shaft connected to the engine, and has different transmission ratios between the output shaft and the input shaft. In addition to winding two transmission belts, a tension pulley is attached to each of the first and second transmission belts, which can be selectively entered and operated based on the operation of a manual operation lever; The present invention relates to a riding type rice transplanter equipped with a transmission configured to link a foot pedal to a pulley and forcibly cut and operate a tension pulley in an engaged state based on the operation of the foot pedal.

Conventionally, in the above riding type rice transplanter, a tension pulley is generally provided below each of the first and second transmission belts, whereas a manual operation lever and a foot pedal are provided above each of the first and second transmission belts. In order to link the lever and the tension pulley, a link or wire may be passed through the gap between the engine or transmission case and the first or second transmission belt, or
It is necessary to detour the first or second transmission belt on the lateral outer side, which complicates the linkage structure and has the drawback that the width of the machine body increases from side to side due to the linkage member. In addition, the tension pulley separated from the belt due to the cutting operation is located close to the ground, which has the disadvantage of being damaged by collision with other objects such as thrown up stones.

In particular, when planting in paddy fields with deep hard ground, there is a risk that the tension pulleys located below the first and second transmission belts may plunge into the mud. The disadvantage was that the range of work that could be done was limited.

This invention was created in view of the above circumstances, and aims to increase the height of the aircraft above the ground as much as possible to increase its versatility so that it can be used efficiently even in deep paddy fields, and to effectively utilize the structure for this purpose. In order to prevent other objects from colliding with the tension pulley, we devised a way to easily and compactly arrange the linkage structure between the tension pulley, manual operation lever, and foot pedal. The purpose is to provide an advantageous arrangement in terms of operating space.

The characteristic configuration of the present invention for achieving the above-mentioned object is that, in the riding rice transplanter described above, the output shaft is positioned at a higher position than the input shaft, the first and second transmission belts are wound in an attitude that slopes downward toward the rear of the machine, both of the tension pulleys and the manual operation lever and foot pedal connected thereto are all provided above the first and second transmission belts, and the manual operation lever is provided so as to be freely operable along a straight path in the fore-and-aft direction of the machine, and this configuration provides the following effects.

In other words, the output shaft connected to the engine is located higher than the input shaft of the transmission connected to the wheels, so that the height of the machine above the ground can be set as high as possible, thereby increasing the workable range with respect to the depth of the paddy field. It can be expanded to increase its versatility.

Since the output shaft is located further forward of the machine than the input shaft, the first and second transmission belts are wound in a position that is positioned lower toward the rear of the machine. This is a space that runs above the power transmission belt and is hidden behind the power transmission belt when viewed from the front, in other words, a space where stones, etc. are less likely to be thrown up, and where mud is less likely to enter even when working in deep paddy fields. Since each of the tension pulleys is provided with a manual operation lever and a foot pedal linked to them, it is possible to not only prevent rocks thrown up from hitting the tension pulleys, but also prevent the tension pulleys from colliding with each other. The control lever and the foot pedal can be linked together in a simple and compact structure without increasing the left and right width of the machine due to the linking member, and the entire device can be miniaturized.

Furthermore, even when working in deep paddy fields, the connecting members between the tension pulley, operating lever, and foot pedal are less likely to get caked with mud, allowing efficient work with less chance of malfunction.

Moreover, since the operating lever is provided so that it can be operated freely along a straight path in the longitudinal direction of the aircraft, it can be operated in a narrower space on the side of the mission case compared to, for example, operating in the horizontal direction of the aircraft. As with pushing and pulling the lever by bending and stretching the arm, it is ergonomically comfortable, easy and quick to operate, and is advantageous in terms of both space and operation.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

An engine 3 is mounted on the front part of a traveling vehicle body with wheels 1 and 2 mounted on the front and rear wheels, and a seedling planting device 4 is installed at the rear part of the vehicle so that it can be driven up and down via a hydraulic cylinder 5. A driver's seat 6 is provided at the same position, and a riding-type rice transplanter is constructed.

To transmit power from the engine 3 to the wheels 1 and 2, power is transmitted from the engine 3 to the transmission 7 via a double tension transmission 8, and from the transmission 7 to its internal gear transmission mechanism ( (not shown) to the front and rear wheels 1 and 2.

To configure the transmission 8, a camshaft 10 interlocked with the crankshaft 9 of the engine 3 protrudes to one side of the aircraft body, and the protruding portion is connected to the engine side output shaft 10.
, an output pulley 11 is attached to the output shaft 10, and input pulleys 13 and 14 of different sizes are attached to the input shaft 12 protruding from the transmission 7, and the output shaft 10 is placed at a higher position than the input shaft 12. the output pulley 11 and input pulleys 13, 14.
The first and second transmission belts 15, 16
The transmission belts 15 and 16 are wound in an inclined position so as to be positioned downward toward the rear of the machine, and first and second tension pulleys 17 and 18 are attached to both transmission belts 15 and 16, respectively, and positioned above them. The second tension pulleys 17 and 18 are configured to be selectively engaged and operated by a manual operation lever 19 that can be freely operated along a straight path R in the longitudinal direction of the machine body.

The first and second tension pulleys 17, 18
Each of the tension arms 20 and 21 is pivotally connected to a support shaft 23 protruding from the upper part of the transmission case 22 in the left-right direction of the machine body so as to be able to swing freely around the axis P pointing to the left and right direction of the machine body. Arm 20,2
Tension springs 25, 25 are stretched across the frame 1 and the gate-shaped frame 24 when viewed from the front to constantly bias the first and second tension pulleys 17, 18, respectively, toward the entry side.

A manual operation lever 19 is provided on the protruding end side of the support shaft 23.
A plate body 27 is pivotally connected to the supporting bracket 26 so as to be pivotable about the horizontal axis _P1 .
are connected to an intermediate position in the longitudinal direction of the operating lever 19 via a long hole 28, and one end is pivotally connected to a predetermined position of the plate body 27.
9, 30, and both tension arms 20, 21
The plate body 27 is provided with a groove 32 having a predetermined width, and both side walls 32a, 32a of the groove 32 are pivotally connected to each other through a long hole 31.
A fixing pin 33 is protruded and brought into contact with the plate 27 so that the plate 27 can be swung within a predetermined range.

With the above configuration, as the lever 19 swings, the second tension pulley 18 is separated from the second transmission belt 16 via the second link 30 against the biasing force of the spring 25, while the first tension pulley 18 is separated from the second transmission belt 16. A high-speed state in which the pulley 17 enters and operates the first transmission belt 15 by the biasing force of the spring 25 without acting on the first link 29 through the elongated hole 31 (see A in FIG. 4), and a first tension state. A low speed state in which the second tension pulley 18 is operated while separating the pulley 17 from the first transmission belt 15 (see FIG. is also separated from the first and second transmission belts 15 and 16 (the fourth
(see c in the figure) is obtained.

In each of the low speed state and high speed state, the first
Both of the second links 29 and 30 are configured to be displaced on the same side with respect to the imaginary straight line L connecting the swing axis P of the lever 19 and the swing axis _P1 of the plate body 27, The structure is such that both the low speed state and the high speed state are stably maintained by the biasing force of one of the springs 25, 25.

Long hole forming member 36 connected to the tip of the rod 35
is inserted between the first and second links 29, 30, and the pins 37, 37, which are inserted and fixed in order to attach the springs 25, 25 to the first and second links 29, 30, respectively, are inserted into the length. Both links 29 and 30 are fitted into the elongated hole 38 of the hole forming member 36.
The rod 35 and the tension pulleys 17 and 18 are linked with each other while the rod 35 is positioned, and the rod 35 is connected with the foot pedal 40 which is biased via the spring 39. The elongated hole 38 allows the tension pulleys 17 and 18 to be engaged selectively, and when the pedal 40 is depressed, the elongated holes formed in the first and second links 29 and 30 are opened. Hole 31,3
1, the tension pulleys 17, 18 which are in the engaged state can be forcibly turned off without displacing the operating lever 19 in any way, and the transmission to the transmission 7 can be stopped.

In the figure, 41 indicates a lock member that maintains the pedal 40 in the off state, and 42 indicates a safety switch that allows the starter motor to operate only when the pedal 40 is in the off state.

Further, numeral 43 in the figure indicates a defrock pedal provided on the same side as the pedal 40 in the left-right direction of the aircraft body.

Reference numeral 44 in the figure indicates a stopper that restricts the return position of the foot pedal 40 when the foot pedal 40 is not operated. The tension arms 20, 2 are inserted into the elongated hole 38 of the hole forming member 36.
1 is configured to be turned on and off.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the riding-type rice transplanter according to the present invention. Figure 1 is an overall side view of the rice transplanter, Figure 2 is a partially cutaway front view of the main part, and Figure 3 is a partially cutaway view of the main part. The side view and FIG. 4 are action explanatory diagrams, where A shows a high speed state, B shows a low speed state, and C shows a stopped state. FIG. 5 is a partially cutaway perspective view of the main part, and FIG. 6 is a sectional view of the main part in a stopped state. 3...Engine, 1...Front wheel, 7...Mission, 10...Output shaft, 12...Input shaft, 40...
...Foot pedal, 15, 16...Transmission belt, 1
7, 18... Tension pulley, 19... Manual operation lever, R... Straight path.

Claims (1)

[Scope of utility model registration request] The input shaft 12 of the transmission 7 linked to the front wheels 1, 1 is located on the rear side of the aircraft body than the output shaft 10 linked to the engine 3, and two shafts with different transmission ratios are provided between the output shaft 10 and the input shaft 12. The transmission belts 15 and 16 are wound around the first and second transmission belts 15 and 16.
A manual operation lever 1 is provided for each of the transmission belts 15 and 16.
Tension pulleys 17 and 18 are attached which can be selectively engaged and operated based on the operation of step 9, and a foot pedal 40 is linked to the tension pulleys 17 and 18. Tension pulley 17 or 1 in the engaged state
8, the riding type rice transplanter is equipped with a transmission 8 configured to forcibly switch off the first and second The two transmission belts 15 and 16 are wound in such a manner that they are inclined downward toward the rear of the machine, and both of the tension pulleys 17 and 18, and the manual operation lever 19 and foot pedal 40 that are linked to these, are connected to each other. A riding-type rice transplanter characterized in that the manual operation lever 19 is provided above the first and second transmission belts 15 and 16 and is operable along a straight path R in the longitudinal direction of the machine.