JPH07255230A - Power transmission mechanism for sulky rice transplanter - Google Patents

Abstract

PURPOSE:To improve the weight balance in the front, rear, right and left and facilitate the speed changing operation in a sulky rice transplanter. CONSTITUTION:This power transmission mechanism for a sulky rice transplanter is obtained by integrally attaching a hydraulic type infinitely variable-speed drive device (HST) to one side of an engine 2 in a rice transplanter having a planting part 15 connected to the rear of a mobile machine body 1, arranging the HST in front of the mobile machine body 1, locating the HST under a step of the mobile machine body 1, integrally attaching the HST to the rear side of the engine 2, arranging the HST in front of the mobile machine body, interlocking and connecting the HST in a deceleration case 40 arranged in the rear thereof, arranging the engine 2 in front of the mobile machine body 1, providing the HST on one lateral side of the engine 2, arranging a battery 57 and an air cleaner 59 on the other lateral side, installing a speed change lever 29 on one lateral side of a driver's seat and interlocking and connecting the speed change lever 29 to a speed change ratio changing lever for the HST.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission mechanism for a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, a passenger rice transplanter has been equipped with a hydraulic continuously variable transmission, a transmission case, etc. for transmitting power from an engine to front and rear wheels and a planting portion, and also supports an electric system. Is equipped with a battery for.

[0003]

However, if the engine, the hydraulic continuously variable transmission, the transmission case, etc. are separately provided, the structure becomes complicated, and the assembly work and maintenance work of the traveling machine body become complicated. In addition, if these members are not deployed at appropriate positions on the traveling aircraft,
If the power transmission system becomes complicated, or if the above-mentioned members and batteries are not placed in appropriate positions on the traveling body, the weight distribution of the traveling body will be poor and the stability will be impaired, and the electrical wiring attached to the battery , It may come into contact with a movable part of the power transmission mechanism to cause a short circuit.

[0004]

According to the present invention, in a riding rice transplanter, a hydraulic type continuously variable transmission is integrally mounted on one side of an engine and disposed at a front portion of a traveling machine body, and a hydraulic type continuously variable transmission is provided. The present invention provides a power transmission mechanism for a riding rice transplanter, which is characterized in that the machine is located below the step of the traveling machine body.

Further, a hydraulic type continuously variable transmission is integrally mounted on one side of the engine and is arranged at one side of the front part of the traveling machine body, and the hydraulic type continuously variable transmission is provided in a deceleration case arranged behind these. The engine is installed in front of the traveling machine, the hydraulic continuously variable transmission is installed on one side of the engine, and the battery and the air cleaner are installed on the other side of the engine. That is, a hydraulic continuously variable transmission is integrally attached to one side of the engine and is installed in the front part of the traveling machine body, and a speed change lever is provided on one side of a driving seat provided in the rear part of the traveling machine body. It is also characterized in that the speed change lever is linked to the speed ratio change lever of the hydraulic continuously variable transmission.

[0006]

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

FIG. 1 shows a power transmission mechanism A1 according to the first embodiment of the present invention.
1 shows a riding rice transplanter A equipped with a traveling machine body 1 in which an engine 2 and a hydraulic continuously variable transmission HST are mounted on a vehicle body frame 3, and a deceleration case 40 is arranged behind them. A front wheel 6 is pivotally supported in front of a mission case 4 arranged behind it via a front axle case 5, and a rear axle case 7 is connected to a rear portion of the mission case 4 so as to be connected to the rear axle case 7. The rear wheel 8 is pivotally supported, the spare seedling mounts 10 are attached to both sides of the hood 9 that covers the engine 2, and the vehicle body cover 12 is attached through step 11.
The transmission case 4 and the like are covered by the above, a driver's seat 13 is mounted on the upper part of the vehicle body cover 12, and a steering handle 14 is provided in front of the driver's seat 13 and at the rear of the hood 9.

A planting section 15 is connected to the rear of the traveling machine body 1, and the planting section 15 is equipped with a seedling stand 16 for planting 6 rows and a plurality of planting claws 17, etc. While supporting the seedling placing table 16 of the planting case 20 through the lower rail 18 and the guide rail 19 so as to be freely slidable left and right,
A rotary case 21 that rotates at a constant speed in one direction is supported by the planting case 20, and a pair of claw cases 22 are arranged symmetrically around the rotary shaft center of the rotary case 21, and the claw case 22 is planted at the tip of the claw case 22. The claw 17 is attached.

A support frame 24 is provided on the front side of the planting case 20 via a rolling fulcrum shaft 23, and the support frame 24 is provided with a three-point link mechanism 27 including a top link 25 and a lower link 26 to provide a traveling body. Connected to the rear side of 1,
Connect the lifting hydraulic cylinder 28 to the lower link 26, and
The planting section 15 can be moved up and down via a point link mechanism 27.

In the figure, 29 is a gear shift lever, 30 is a planting part elevating lever, 31 is a planting sensitivity adjusting lever, 32 is a main clutch pedal, 34 is a center float, 35 is a side float, 36
Is a bracket that supports the rolling cylinder 37.

In such a riding rice transplanter A, as a first embodiment of the present invention, as shown in FIGS. 2 to 4, a hydraulic continuously variable transmission HST is integrally attached to the left side surface of the engine 2,
This is installed in the front part of the upper surface of the vehicle body frame 3 of the traveling machine body 1 with the main shaft in the left-right direction, and the reduction gear case 40 is arranged behind this, and the left side surface of the hydraulic continuously variable transmission HST and the reduction gear case 40 is arranged. The belt 43 is wound between the driving pulley 41 and the passive pulley 42 projecting from each of them to form a belt transmission mechanism 44, and the power from the engine 2 is continuously changed by the hydraulic continuously variable transmission HST. Then, the power is transmitted to the reduction gear case 40 via the belt transmission mechanism 44, and the power is transmitted from the reduction gear case 40 to the transmission case 4 via the propeller shaft 45 and the rear axle case 7 connected to the rear of the transmission case 4. There is.

46 and 47 are idle pulleys and springs for holding the tension of the belt 43, respectively.

The hydraulic type continuously variable transmission HST is composed of a hydraulic pump linked to the engine 2 and a hydraulic motor linked to the pump and connected to an output shaft, and at least one of the pump and the motor. Is a variable capacity type such as a swash plate type or a swash axis type, and has the characteristic that the speed ratio can be changed steplessly.

Further, as shown in FIGS. 1 and 3, the step 11 is formed to have a high front and a low front, and the hydraulic continuously variable transmission HST is positioned below the step 11.

As shown in FIG. 4, the deceleration case 40 horizontally supports an input shaft 49 and an intermediate shaft 50 inside a casing 48, and a clutch is provided between the left end of the input shaft 49 and the passive pulley 42. 51, a driving gear 52 is formed in the middle of the input shaft 49, meshes with a passive gear 53 formed on the intermediate shaft 50, and is axially supported on the right end of the intermediate shaft 50 and the rear surface of the casing 48. Output shaft
The front end of 54 is interlockingly connected with a meshing bevel gear 55, and the rear end of the output shaft 54 is interlockingly connected to the front end of the propeller shaft 45, so that the power transmitted from the hydraulic continuously variable transmission HST to the mission case 4 is 2 The speed can be changed in stages, and the axial direction of the rotational power is converted from the left-right direction to the front-back direction.

In FIG. 4, reference numeral 56 is a clutch operating mechanism,
The gearshift lever 29, which will be described later, is interlocked and coupled through a interlocking mechanism such as a wire.

With such a structure, the engine 2 and the hydraulic continuously variable transmission HST are integrally formed, and the hydraulic continuously variable transmission is obtained.
The structure is simplified without the need for hydraulic piping attached to the HST, and the integrated engine 2 and hydraulic continuously variable transmission HS
Since T is arranged at the forefront part of the traveling body 1, and the deceleration case 40 is arranged close to the rear of the traveling body 1, the weights thereof are the transmission case 4 and the rear axle case 7 arranged at the rear part of the traveling body 1. , A hydraulic cylinder 28 for raising and lowering the planting section, a driver seated in the driver's seat at the rear of the traveling body 1 and the planting section 15
Balances with the weight of the car, and the front-rear balance of the car body becomes good.

Further, the step 11 is formed to have a high front and a low front,
By positioning the hydraulic continuously variable transmission HST below the step 11, the engine 2 and the hydraulic continuously variable transmission are placed.
The HST is better ventilated and these are better cooled. Further, the width of the bonnet 9 is narrowed to make a step.
It is possible to reduce the amount of overhang on the left and right of 11 and the driver walks on step 11 to transfer the seedlings to the spare seedling stand 10 for seedling splicing.
It is possible to prevent the left-right balance of the traveling machine body 1 from being lost when going to.

As shown in FIG. 2, on the right side of the front portion of the traveling machine body 1, that is, on the opposite side of the hydraulic continuously variable transmission HST with the engine 2 in between, the battery 57 is held with an appropriate distance from the engine 2. And the air cleaner 59 are arranged.By doing so, the electrical wiring attached to the battery 57 contacts the belt 43 between the hydraulic continuously variable transmission HST and the reduction case 40, and the insulation coating is removed. It is possible to prevent peeling and disconnection.

Further, the hydraulic continuously variable transmission HST and the battery
The weight balance with 57 improves the left-right balance of the traveling body 1, and there is no interference with the hydraulic continuously variable transmission HST.
Can be equipped with a large air cleaner 59.

Further, as shown in FIGS. 4 and 5, a substantially rectangular box-shaped muffler 60 is arranged on the left side of the hydraulic continuously variable transmission HST at an appropriate interval, and the muffler 60 is provided. On the inner side of the front part, from the left side of the upper rear part of the engine 2, a hydraulic continuously variable transmission
Exhaust pipe 61 circumventing the HST at a distance above and in front of the HST
Is connected via a flange 62, the start end of a tail pipe 63 that is bent in a substantially spiral shape is connected to the rear outer surface of the muffler 60, and the end of the tail pipe 63 is opened in front of the muffler 60 in a diagonally front lower direction. I am letting you.

In this way, the exhaust pipe 61 is connected to the hydraulic continuously variable transmission.
Interference between the exhaust pipe 61 and the hydraulic continuously variable transmission HST is prevented by circumventing the upper and the front of the HST with a space therebetween and refracting the tail pipe 63 in a substantially spiral shape. Sufficient exhaust pipe 61 and tail pipe in a small space
The length of 63 can be secured, the noise reduction effect can be enhanced, and the low speed torque characteristic of the engine 2 can be improved.

Further, by disposing the air cleaner 59 and the muffler 60 on opposite sides of the engine 2, the engine 2
It is possible to prevent the intake air temperature from rising and prevent the charging efficiency from decreasing.

Further, as shown in FIG. 6, a pivot 64 is laterally provided on the left side of the driver's seat 13 at the rear of the traveling body 1, and the lower end of the speed change lever 29 is pivotally attached to the pivot 64. Same speed lever
The rear end of the interlocking rod 66 is pivotally attached to the lower end of the downward extension portion 65 of the 29, and a gear ratio changing shaft 67 is provided on the left side surface of the front end of the hydraulic continuously variable transmission HST so as to change the gear ratio. The base end of the gear ratio changing lever 68 is fixed to the shaft 67, the front end of the interlocking rod 66 is pivotally attached to the tip of the gear ratio changing lever 68, and the gear change lever 29
The operation operation of is transmitted to the hydraulic continuously variable transmission HST.

Formed on the floor by bending the interlocking rod 66 obliquely rearward and downward at a position above the driving pulley 41 of the hydraulic continuously variable transmission HST and horizontally refracting at the center of the interlocking rod 66. It is designed to be housed inside the shaft tunnel 69.

The operation of the shift lever 29 is as shown in FIG.
It is guided by a guide plate 70 indicated by. That is, a substantially Y-shaped guide hole 71 that opens rearward is formed in the guide plate 70 so that the middle portion of the speed change lever 29 is inserted, and the front end of the guide hole 71 is set at the forward high speed position 72 for shifting operation Branch position is in neutral position
73, the right rear end of the guide hole 71 which is split into two parts, and the backward position 74,
The rear end position on the left side is set to the seedling joint position 75, and the power transmission of the clutch 51 and the hydraulic continuously variable transmission HST is cut off at this seedling joint position 75.

With such a structure, since a single speed change lever 29 arranged on the left side of the driver's seat 13 can be operated from forward high speed to reverse, the speed change operation is facilitated, and further,
If the shift lever 29 is operated to the seedling joining position 75 during seedling joining, the power-off state is held and the traveling machine body 1 holds the stopped state, so that seedling joining work can be performed safely.

FIG. 8 shows a modification of the deceleration case. The deceleration case 76 axially supports the input shaft 78 and the intermediate shaft 58 in the casing 77 in the left-right direction, and The clutch 51 is installed between the passive pulley 42 and the input shaft 78.
A sliding piece 81 with large and small driving gears 79 and 80 formed in the middle of the shaft is spline-fitted so that it can mesh with large and small passive gears 82 and 83 formed on the intermediate shaft 58, and the right end of the intermediate shaft 58 and the casing 77 rear The front end of the output shaft 54, which is axially supported on the side surface, is interlockingly connected by a meshing bevel gear 55, and the rear end of the output shaft 54 is interlockingly connected to the front end of the propeller shaft 45, thereby providing a hydraulic continuously variable transmission HS.
The power transmitted from T to the mission case 4 can be shifted in two stages.

FIG. 9 shows, as a second embodiment, an engine 2 and a hydraulic type continuously variable transmission which are integrally constructed as in the first embodiment.
HST with the main shaft in the front-back direction and hydraulic type continuously variable transmission HS
The T is rearward, the front of the traveling machine body 1 is arranged slightly to the right, and the reduction case 84 is arranged to the rear or slightly left of the traveling body 1 to balance the left and right, and the hydraulic continuously variable transmission HST Power is transmitted to the deceleration case 84 via the belt transmission mechanism 44 similar to that of the embodiment, and power is transmitted from the deceleration case 84 to the transmission case 4 via the propeller shaft 45.

As shown in FIG. 10, the deceleration case 84 of this embodiment axially supports the input shaft 86 and the output shaft 87 in the front and rear direction inside the casing 85, and connects the front end of the input shaft 86 and the passive pulley 42. A large and small passive gear 9 formed on the output shaft 54 is slidably fitted with a sliding piece 90 having a clutch 51 interposed between the input shaft 86 and large and small driving gears 88 and 89 formed in the middle of the input shaft 86.
1,92 can be meshed, and the rear end of the output shaft 87 is linked to the front end of the propeller shaft 45.
The power transmitted from the vehicle to the mission case 4 can be shifted in two stages.

With this structure, the meshing bevel gear in the reduction case can be omitted, and the structure can be simplified.

[0032]

According to the present invention, in the riding rice transplanter,
By integrally mounting the hydraulic continuously variable transmission on one side of the engine and arranging it at the front part of the traveling machine body, by positioning the hydraulic continuously variable transmission below the step of the traveling machine body,
The structure is simple without the hydraulic piping attached to the hydraulic continuously variable transmission, the front and rear balance of the vehicle body is good, and the ventilation between the engine and the hydraulic continuously variable transmission is good, and these are cooled. Can be good.

Further, a hydraulic continuously variable transmission is integrally mounted on one side of the engine and is arranged at one side of the front part of the traveling machine body, and a deceleration case arranged at the rear of these is used as the hydraulic continuously variable transmission. By interlocking with the gear, the meshing bevel gear in the reduction case can be omitted, and the structure can be simplified.

An engine is arranged in the front part of the traveling machine body, a hydraulic continuously variable transmission is arranged on one side of the engine, and a battery and an air cleaner are arranged on the other side of the engine. By doing so, it is possible to prevent the electric wiring attached to the battery from coming into contact with the belt between the hydraulic type continuously variable transmission and the reduction gear case, and removing the coating or breaking the wire. The left-right balance of the aircraft can be improved.

Further, a hydraulic continuously variable transmission is integrally attached to one side of the engine and is arranged in the front part of the traveling machine body, and a speed change lever is provided on one side of a driving seat provided in the rear part of the traveling machine body. The gear shift operation can be facilitated by interlocking the gear shift lever with the gear ratio changing lever of the hydraulic continuously variable transmission.

[Brief description of drawings]

FIG. 1 is an overall side view of a riding rice transplanter equipped with a power transmission mechanism according to the present invention (first embodiment).

FIG. 2 is an explanatory plan view showing the arrangement of a power transmission mechanism (first embodiment).

FIG. 3 is a left side view of the front part of the traveling vehicle body (first embodiment).

FIG. 4 is a plan view of the front portion of the traveling body (first embodiment).

FIG. 5 is a left side view of the muffler (first embodiment).

FIG. 6 is a left side view showing the main shift operation system (first embodiment).

FIG. 7 is a plan view of a guide plate (first embodiment).

FIG. 8 is an explanatory view showing a configuration of a deceleration case (a modified example of the first embodiment).

FIG. 9 is an explanatory plan view showing the arrangement state of the power transmission mechanism (second embodiment).

FIG. 10 is an explanatory diagram showing a configuration of a deceleration case (second embodiment).

[Explanation of symbols]

 A Passenger rice transplanter HST Hydraulic continuously variable transmission 1 Traveling machine 2 Engine 11 Step 13 Driver's seat 15 Planting part 29 Gearshift lever 40 Deceleration case 57 Battery 59 Air cleaner 68 Gear ratio change lever

Claims (4)

[Claims] 1. In a passenger rice transplanter, a hydraulic type continuously variable transmission (HST) is integrally mounted on one side of an engine (2) to provide a traveling body.
It is installed in front of (1) and is a hydraulic type continuously variable transmission (HST).
The power transmission mechanism of the riding rice transplanter is characterized in that the vehicle is positioned below the step (11) of the traveling body (1). 2. In a passenger rice transplanter, a hydraulic type continuously variable transmission (HST) is integrally attached to a rear side of an engine (2) to provide a traveling body.
A power transmission mechanism for a passenger rice transplanter, characterized in that the hydraulic type continuously variable transmission (HST) is interlockingly connected to a reduction case (40) arranged in front of (1) and behind them. . 3. In a passenger rice transplanter, an engine (2) is arranged in front of a traveling body (1), and a hydraulic continuously variable transmission (HST) is arranged on one side of the engine (2). The power transmission mechanism for the passenger rice transplanter is characterized in that the battery (57) and the air cleaner (59) are arranged on the other side of the engine (2). 4. In a passenger rice transplanter, a hydraulic type continuously variable transmission (HST) is integrally attached to one side of an engine (2) to provide a traveling body.
A gearshift lever (29) is provided on one side of the driver's seat (13) provided at the front part of (1) and at the rear part of the traveling body (1). A power transmission mechanism for a passenger rice transplanter, which is linked to a gear ratio changing lever (68) of a gear transmission (HST).