JP2000270620A - Paddy field working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take a good balance in front and rear of a self traveling machine body without inviting much increase of the length of the machine body in front to rear and the machine weight. SOLUTION: This paddy field working machine is provided by being equipped with a transmission case 9 supporting front wheels 1 with a shaft through a front wheel shaft case 8, linking a paddy working device at the rear part of the self-traveling machine body loaded with an engine 11 in the front direction of the transmission case 9, and also linking a static hydraulic type step-less transmission device 41 at the lateral side surface of the transmission case 9 in a shape of entering from the front direction into an upper position of a sideways transmission case part 8 extruding from the lower part of the transmission case 9 toward the sideways and out direction among the front wheel shaft cases 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddy field such as a rice transplanter in which a paddy working device such as a seedling planting device is connected to a rear part of a self-propelled body having a hydrostatic stepless transmission as a transmission for traveling. Work equipment.

[0002]

2. Description of the Related Art A conventional paddy working machine is disclosed in Japanese Unexamined Patent Publication No. 8-31.
As disclosed in Japanese Patent No. 0266, a transmission case to which a hydrostatic continuously variable transmission is connected is disposed at the rear of the self-propelled body.

[0003]

However, according to the above-mentioned prior art, the engine disposed in front of the front wheels effectively acts as a load on the front wheels, but is a heavy transmission case with a hydrostatic stepless transmission. Does not work effectively as a front wheel load due to the arrangement at the rear, so to improve the front-rear balance of the self-propelled body, arrange the engine more forward or wear a heavy weight balance weight. It was necessary to make the front and rear lengths of the aircraft unreasonably long and the weight of the aircraft unreasonably heavy.

[0004] It is an object of the present invention to improve the front-rear balance of a self-propelled body without causing an increase in the length of the body and the weight of the body.

[0005]

The features, functions and effects of the present invention according to claim 1 are as follows.

[Characteristics] A paddle work device is connected to a rear part of a self-propelled body equipped with an engine in front of the transmission case and a transmission case is provided at the front of the transmission case. It is characterized in that a hydrostatic continuously variable transmission is connected to a side surface of the front axle case from the front into a portion above a lateral transmission case portion projecting laterally outward from a lower portion of the transmission case.

[Action] The front wheel is supported by a transmission case to which a hydrostatic continuously variable transmission is connected, and the transmission case with the hydrostatic continuously variable transmission is arranged above the front wheels, so that the weight is large. The transmission case with the hydrostatic stepless transmission, which is an object, can effectively act as a front wheel load.

In addition, since the hydrostatic stepless transmission is connected to the side surface of the transmission case, the operation steps disposed above the transmission case can be installed closer to the transmission case.

In addition, in order to connect the hydrostatic stepless transmission to the lateral side surface of the transmission case, the front axle case which supports the front wheels and supports the front wheels to the transmission case by connecting the front wheels to the transmission case. Since the hydrostatic stepless transmission is arranged so that it enters from the front into the upper part of the lateral transmission case projecting laterally outward from the lower part of the transmission case, the hydrostatic stepless transmission is mounted on the lateral side of the transmission case. The hydrostatic continuously variable transmission can be arranged as far back as possible without disturbing the lateral transmission case section while connecting the transmission, so that the hydrostatic continuously variable transmission projects forward from the transmission case. By reducing the amount, the engine disposed in front of the transmission case can be moved toward the transmission case, that is, rearward.

[Effects] Therefore, the front-rear balance of the self-propelled body can be improved, the operation steps can be set low, and the engine can be installed without increasing the length of the body and the weight of the body. Being able to be positioned as far back as possible has made it possible to further suppress an increase in the longitudinal length of the aircraft.

The features, functions and effects of the present invention according to claim 2 are as follows.

[Features] In the present invention according to the first aspect, the front axle case is fixed to the transmission case.

[Operation] Since the front axle case is fixed to the transmission case and the vertical interval between the lateral transmission case and the hydrostatic continuously variable transmission is fixed, the hydrostatic transmission case is located above the lateral transmission case. While adopting the configuration of arranging the stepped transmission, it is possible to prevent mutual interference between the two and arrange them close to each other.

[Effect] Therefore, the transmission case with the hydrostatic continuously variable transmission can be made compact in the vertical direction, and the heavy hydrostatic continuously variable transmission can be arranged as low as possible. Now, the stability of the self-propelled aircraft can be improved.

The features, functions and effects of the present invention according to claim 3 are as follows.

[Features] A paddy field working device is connected to a rear part of a self-propelled body having an engine mounted in front of the transmission case and a transmission case for supporting the front wheels.
A hydrostatic stepless transmission is connected to the lateral side of the transmission case, and the hydrostatic stepless transmission is arranged in a state located on one of the right and left sides of the left and right center of the self-propelled body. The point is that the transmission case is arranged so as to enter the left and right sides.

[Operation] The front wheel is pivotally supported by a transmission case to which a hydrostatic continuously variable transmission is connected, and the transmission case with the hydrostatic continuously variable transmission is disposed above the front wheels. The transmission case with the hydrostatic stepless transmission, which is an object, can effectively act as a front wheel load.

In addition, since the hydrostatic stepless transmission is connected to the lateral side of the transmission case, the operation steps arranged above the transmission case can be installed closer to the transmission case.

In addition, a hydrostatic continuously variable transmission is arranged on one of the left and right sides of the left and right center of the self-propelled body, and the transmission case is arranged to enter the other side on the left and right sides. A transmission case with a hydrostatic stepless transmission is provided by positioning the center of gravity of the transmission case with a hydrostatic stepless transmission near the center of the fuselage left and right while adopting a configuration that connects the stepless transmission. This can prevent the left-right balance of the self-propelled aircraft from deteriorating.

[Effect] Therefore, the front-rear balance of the self-propelled body can be improved without increasing the front-rear length and the body weight of the self-propelled body. Can be improved.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rice transplanter, which is an example of a paddy field working machine, includes a pair of left and right driving front wheels 1 and a pair of left and right driving rear wheels 2, as shown in FIGS. A multi-row seedling planting device 4 as an example of a paddy field working device is connected to a rear portion of the riding type self-propelled body 3 via a four-link mechanism 5 so as to be able to move up and down freely. An elevating cylinder 6 using a hydraulic cylinder for elevating and lowering is provided, and a fertilizer application device 7 is provided.

As shown in FIGS. 3 and 4, the self-propelled body 3 has a transmission case 9 for supporting the driving front wheel 1 via a front axle case 8, and the driving rear wheel 2 The engine 11 is located near the front of the transmission case 9 in the body frame supported via the rear axle case 10.
Is mounted so that its output shaft 11a is positioned laterally via a vibration-proof rubber 12 (an example of a vibration-proof material), and the boarding operation unit 13 is mounted in a state where it is located behind the engine 11. ing.

The on-board driving section 13 includes a steering handle 14 for steering the front wheels 1, a seat 15 located behind the steering wheel 14, and a driving step S. The operation step S is arranged at a level higher than the transmission case 9.

The seedling planting apparatus 4 is provided with a seedling stand 16 which is driven to reciprocate at a set stroke in the left-right direction, and moves up and down between a seedling outlet and a field in conjunction with the movement of the seedling stand 16. A plurality of planting mechanisms 17 for taking out the seedlings on the seedling stand 16 by the planting unit amount by circulating the seeds and planting the seedlings in the field at right and left intervals are provided. It has a well-known basic structure in which a plurality of ground floats 18 for leveling a field to be planted by sliding are arranged at right and left intervals.

The fertilizer applicator 7 has a fertilizer hopper 19 mounted on the self-propelled body 3 and a feeder 20 for feeding the fertilizer in the fertilizer hopper 19 by a set amount in conjunction with the planting operation.
And a groove generator 21 for forming a fertilizer groove in the field as the vehicle travels and supplying the fertilizer sent into the groove, and feeding the fed fertilizer to the groove generator 21 via a hose 22. And an electric fan 23 for generating an airflow for performing the operation.

As shown in FIGS. 3 and 4, the engine 1
A continuously variable hydrostatic continuously variable transmission 41 having a lateral input shaft 41a interlocked with the first output shaft 11a via a transmission 40, the output of which is output to the transmission case 9 by a lateral shaft. The input shaft 41a and the lateral output shaft 41b are connected to each other so as to be transmitted and transmitted.

The above-mentioned wrapping transmission device 40 includes an output shaft 11
The transmission belt 40c is wound around an output pulley 40a mounted on the input shaft 41a and an input pulley 40b mounted on the input shaft 41a, and a tension pulley 40d for applying tension to the transmission belt 40b is provided.

The input shaft 4 of the hydrostatic continuously variable transmission 41
Reference numeral 1a extends to the other side through the front of the transmission case 9.

As shown in FIG. 4, a hydraulic pump 42 driven by the extending end of the input shaft 41a of the hydrostatic stepless transmission 41 is provided on the other side of the transmission case 9 on the left, right, left and right sides. As shown in FIGS. 3 and 4, the upper surface of the transmission case 9 controls a torque generator 43 for hydraulic power steering interlocked with a handle shaft 14a of the steering handle 14 and the lifting cylinder 6 as shown in FIGS. Hydraulic control valve 4 for lifting / lowering operation of working equipment
4 are attached.

The hydraulic system will be described in detail. The transmission case 9 is used as a hydraulic oil tank, and the oil filter 4 is mounted on the other side of the transmission case 9.
5, the hydraulic oil in the transmission case 9 is supplied to the hydrostatic stepless transmission 41 and the hydraulic pump 42, and the hydraulic oil from the hydraulic pump 42 is supplied to the torque generator 43, and then through the hydraulic control valve 44. It is supplied to the lifting cylinder 6. The drain of the hydrostatic continuously variable transmission 41 is returned to the front axle case 8 communicating with the transmission case 9, and the drain of the hydraulic control valve 44 when the operation of the elevating cylinder 6 is stopped is returned to the transmission case 9. It is supposed to be.

Then, in the mission case 9,
The main clutch for interrupting the power from the output shaft 41b of the hydrostatic continuously variable transmission 41, the gear shift type sub-transmission mechanism for high-low two-stage transmission, and the differential mechanism for the left and right driving front wheels 1 are transmitted by a traveling transmission system. A one-way clutch that transmits only forward power among the power from the main clutch, a speed change mechanism for changing the power between these strains, and a planting clutch that intermittently powers these powers. Is installed as a transmission element of the planting transmission system branched from the traveling transmission system. In addition, the front axle case 8 includes:
A transmission mechanism from the differential mechanism to the drive front wheel 1 is provided,
The rear axle case 10 includes a transmission mechanism for transmitting the rotation of the differential case transmitted from the differential mechanism via the transmission shaft to the driving rear wheel 2.

The front axle case 8 is fixed to the transmission case 9, and the rear axle case 10 is supported by the body frame so as to freely roll around a longitudinal axis. As shown in FIG. 5, the front axle case 8 has a lateral transmission case portion 8A protruding left and right and laterally outward from a lower portion of the transmission case 9, and a longitudinally connected outer end of the lateral transmission case portion 8A. A front transmission case portion 8B. A front drive wheel 1 is supported at a lower end of the vertical transmission case portion 8B, and the hydrostatic stepless transmission is set in a state of entering the upper portion of the horizontal transmission case portion 8A from the front. 41
Is arranged.

The hydrostatic continuously variable transmission 41 is
Left and right center C of self-propelled body 3 (center between left and right driving front wheels 1)
The transmission case 9 is disposed so as to enter the left and right sides from the left and right center C.

L1 is a shift lever for operating the hydrostatic continuously variable transmission 41. Further, a knuckle arm 202 of the left and right driving front wheels 1 is attached to a pitman arm 201 which is driven and oscillated by the torque generator 43.
This is a drag link that links the two.

[Brief description of the drawings]

FIG. 1 is a side view

FIG. 2 is a plan view

FIG. 3 is a side view of a main part.

FIG. 4 is a plan view of a main part.

FIG. 5 is a front view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front wheel 3 Self-propelled body 4 Paddy field working device 8 Front axle case 8A Lateral transmission case part 9 Transmission case 11 Engine 41 Hydrostatic continuously variable transmission C Left and right center

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Naoki Matsuki 64 Ishizukitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (72) Inventor Shinsuke 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing In-house (72) Inventor Takashi Shimizu 64 Ishizu-Kitacho, Sakai-shi, Osaka F-term in Kubota Sakai Works (reference) 2B062 AA03 AB01 AB07 BA05 BA06 BA07

Claims (3)

[Claims] 1. A paddy working device is connected to a rear part of a self-propelled body having an engine mounted in front of the transmission case, the transmission case being provided with a front wheel pivotally supported via a front axle case, and a lateral side surface of the transmission case. And a hydrostatic stepless transmission is connected from the front axle case to a position above a lateral transmission case portion of the front axle case projecting laterally outward from a lower portion of the transmission case, so as to enter from the front. 2. The paddy working machine according to claim 1, wherein the front axle case is fixed to the transmission case. 3. A paddy working device is connected to a rear part of a self-propelled body equipped with an engine in front of the transmission case and supporting a front wheel, and a hydrostatic stepless is mounted on a lateral side surface of the transmission case. A transmission is connected, the hydrostatic stepless transmission is arranged in a state located on one of the left and right sides of the left and right center of the self-propelled body, and the transmission case is arranged in a state of entering the left and right sides from the left and right center. Paddy working machine.