JP3103351B2 - Riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated structure of a transmission case, a front axle case, and a rear axle case in a rice transplanter having a planting portion mounted on a rear portion of a body of a passenger traveling vehicle.

[0002]

2. Description of the Related Art Conventionally, a walking type rice transplanter has been used in a small-scale field such as a mountainous region. However, recently, a walking type rice transplanter has been used due to agricultural circumstances such as aging of workers and reduction of workers. With such a rice transplanter, the burden on the operator is large and the working time is long, and a riding type rice transplanter has been desired. In addition, the riding type rice transplanter has front and rear wheels arranged at the front and rear ends of an airframe that is long in the front and rear direction, and the transmission case is independently arranged to drive each of the front and rear wheels. And
In order to firmly connect the front and rear mission cases,
It was configured to be supported by a rigid large body frame.

[0003]

However, in the conventional configuration in which the transmission case is supported by a rigid and large body frame, the body becomes large, the body weight increases, and the price becomes expensive. Was. Therefore, the present invention simplifies the support structure for the front and rear wheels,
It is an object of the present invention to provide a riding rice transplanter having an inexpensive configuration.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in a riding rice transplanter having a planting portion arranged at the rear of the body so as to be able to move up and down, a mission case is provided which extends in the front-rear direction substantially at the center of the body at the left and right.
Attach the front axle case to the front of the
A rear axle case is formed at the rear, and the front axle
The rear case and the rear axle case.
It is configured integrally with the base.

[0005]

Next, an embodiment of the present invention will be described. 1 is an overall side view of a small riding rice transplanter having a frame which is a pipe body, FIG. 2 is a partial sectional view of the same overall riding plan, FIG. 3 is a side sectional view showing a front upper portion of the small riding rice transplanter,
4 is a cross-sectional view of the transmission case, FIG. 5 is a rear view showing a body frame for pivotally supporting the elevating link mechanism, FIG. 6 is a front cross-sectional view of the integrally formed hollow body cover, and FIG. FIG. 4 is a partial plan sectional view showing a configuration in which a part is bent.

First, a small riding rice transplanter is shown in FIGS.
A more general configuration will be described. A front and rear wheel 6 and a rear wheel 8 are suspended at a front portion and a rear portion of the traveling vehicle 1, an engine E is mounted above a front portion of the body frame F, and a transmission case M having a long front and rear portion is disposed at the center of the traveling vehicle 1. The front wheel 6 is supported at the front of the transmission case M, and the rear wheel 8 is supported at the rear of the transmission case M. As described above, the transmission case M that extends long in the front-rear direction is disposed at the center position on the left and right sides of the fuselage, and the front wheels 6.6 and the rear wheels 8.8 are disposed at the front and rear sides of the transmission case M. Accordingly, the power transmission configuration for transmitting power to the wheels 6 and 8 can be simplified, the assembly work of power transmission can be facilitated, the cost can be reduced accordingly, and the configuration is inexpensive. be able to. The spare seedling table 10 is provided on both sides of the hood 12e covering the engine E.
The transmission case 10 is disposed, and the transmission case M and the like are covered with a vehicle body cover 12 on which an operator or the like rides. A direction handle 14 is provided.

[0007] The planting section 15 is composed of a seedling stand 16 formed by four-row planting, a plurality of planting claws 17, and the like. A planting transmission frame 20 is supported by the planting transmission frame 20 so as to be reciprocally slidable left and right, and planting claws 17, which are cranked by a crank mechanism 21, are disposed at the rear of the planting transmission frame 20.

A hitch 24 is provided at a front portion of the planting transmission frame 20 via a rolling fulcrum shaft 23, and the hitch 24 is provided at a rear portion of the traveling vehicle 1 via a lifting link mechanism 27 including a top link 25 and a lower link 26. And an elevating cylinder 28 for driving the elevating link mechanism 27 to elevate and lower is connected to a lift arm connected to the lower link 26. And the front wheel 6.6 and the rear wheel 8.8
At the same time, the seedlings for one plant are taken out from the seedling table 16 which can be reciprocated slidably to the left and right by the planting claws 17 and the seedlings are continuously planted.

A traveling speed change lever 29, a main clutch pedal 32, a planting elevating lever 30, and a brake pedal 33 are disposed on the body cover 12 on which the driver's seat 13 and the like are installed. A leveling center float 34, a leveling side float 35, a planting depth setting lever 31, and the like are provided.

The body frame F is constituted by a main frame 2 and an engine frame 3. The engine frame 3 has a front wheel 6 in a side view.
The pipe body is bent substantially U-shaped in plan view along the front shape of the traveling vehicle 1 and is fixed to a horizontal member 41 fixed to the front end of the main frame 2 with the open side facing rearward. doing. A front portion of the engine frame 3 is bent upward to form a bumper portion 3a, and a light 40 or the like can be mounted on the bumper portion 3a.

As described above, the front part of the body frame F is formed by bending the pipe body into a U-shape in plan view to serve as a support part of the power unit, so that the frame of the body frame F is used as a frame for mounting and fixing the engine E. Since the front portion is formed in the engine frame 3 in which the pipe body is bent, the rigidity is maintained high, and the heavy engine E can be stably supported. In addition, since a simple configuration in which welding or the like is reduced as much as possible is employed, the manufacture of the body frame F is facilitated, and the cost can be reduced.

The front ends of two main frames 2, 2 formed of pipes are fixedly provided at the left and right portions of the horizontal member 41. The main frames 2 and 2 are arranged in parallel left and right, a rear portion of the main frames 2 and 2 is curved rearward and upward, and a rear end of the main frames 2 and 2 is disposed above the rear wheel 8.

A body cover 12 is mounted on the main frames 2 and 2. As shown in FIG. 6, the vehicle body cover 12 is integrally hollow-molded of a synthetic resin.
2a, a driver's seat 13 is mounted and fixed on the driver's seat mounting portion 12a, and is supported by a seat frame 9 fixed to the rear portion of the main frame 2. A step portion 12b is formed at the front of the driver's seat mounting portion 12a.
c is formed. As shown in FIG. 3, a support 42 is fixedly provided at the rear of the main frame 2 on the left side.
A Ω-shaped pivot body 43 is fixedly mounted on the support base 42 in a side view,
The base of the main transmission lever 29 is supported inside the Ω-shaped pivot 43. The main shift lever 29 switches between the second forward speed and the reverse speed. Further, an open-side end of a step frame 44 having a substantially U-shape in side view is fixedly provided in the front and rear part of the main frames 2 and 2 and used as a step when getting on and off.

As shown in FIGS. 3 and 7, the vehicle body cover 12 which covers the upper part from the engine frame 3 to the front part of the main frame 2 is formed at the center of the front part on a hood 12e on which the engine E is mounted. The middle part in the front and rear of the step part 12b at the rear part is configured to be thin by being thinned in the left-right direction and to be bent by forming a constricted part 12d,
This constricted part 12d is not formed by hollow molding. Therefore, as shown by a two-dot chain line 12e 'shown in FIG.
2e is turned upward so that the upper part of the engine E can be opened. Further, an opening 12f is formed in the upper part of the bonnet 12e, and a fuel tank 45 is inserted into the opening 12f and fixed at a position above the engine E.

As described above, the driver seat mounting portion 12a on which the driver seat 13 is mounted and the step portion 1 are provided above the body frame F.
2b and a passage 12c on the left and right sides of the engine E, and a hood 12 on which the engine E is mounted.
e and an integral molding of a synthetic resin.
e, opening 12f on which fuel tank 45 can be placed
Is formed, the manufacturing becomes easy, and the assembling work is made easy. Further, by forming an opening 12c above the bonnet 12e and inserting and fixing the fuel tank 45 into the opening 12c, the work of assembling the work vehicle can be simplified and the assembly cost can be reduced. A riding type rice transplanter can be configured.

Then, the integrally formed vehicle body cover 12 is formed.
And the hood 12e is configured to be rotatable upward, so that even if the hood 12e is integrally hollow-formed as the vehicle body cover 12, the front and rear of the vehicle body cover 12 can be formed. Since the middle portion is bendable, the bonnet 12e can be pivoted upward, and the bonnet 12e can be removed for maintenance of the engine E without removing the vehicle body cover 12.
By turning only e upward, the work can be easily performed. Further, when the hood 12e is mounted on the engine E, the hood 12e can be easily fixed by rotating the hood 12e downward without performing positioning or the like of the hood 12e. can do.

A hydraulic pump P for working equipment is disposed at the front of the engine E, and a belt 47 wound around a pulley 46 fixed to an output shaft projecting laterally from the left side of the engine E is provided. The power is transmitted through the motor to supply hydraulic oil to the elevating cylinder 28 described above. The pulley 46 is a double pulley, and power is transmitted to the transmission case M via a belt 48.
The belt 48 is tensioned by a tension pulley 49 so that power transmission can be connected and disconnected in conjunction with the depression operation by the clutch pedal 32 described above.

The transmission case M extends from the lower front and rear central portions of the fuselage frame F to the rear lower portion of the rear end of the fuselage frame F, and is formed to be long in the front-rear direction. ing. In addition, a transmission 51 is formed with a traveling transmission mechanism inside the transmission case M, and front axle cases 5.5 are fixedly provided on left and right side surfaces of the transmission 51, respectively.
Axle cases 53, 53 from the left and right ends of
The front wheel 6 is fixed to the lower end of the axle case 53.
The axle 54 to which the 6 is fixed is supported. At the rear end of the transmission case M, there are formed cylindrical rear axle cases 7.7 each having an axial center in the left-right direction, and axles 56 are supported in the rear axle cases 7.7. 5
The rear wheels 8.8 are fixed to the left and right ends of the 6.56 so that the conventional transmission case is eliminated. Therefore, front and rear front axle cases 5.5 and rear axle cases 7
7 are integrally formed in the same transmission case M,
The transmission case M constitutes a part of a frame member that supports the wheels 6,8.

As described above, the front axle case 5 is provided on the front side of the transmission case M which extends long in the front-rear direction.
5 is integrally formed, and the rear axle cases 7.7 are integrally formed on the rear side, so that there is no need to separately support these axle cases 5.7, and the transmission case M and The transmission case M can be integrated, and the transmission case M forms a part of a frame that supports the traveling vehicle 1 to reduce the load on the body frame F, and has a highly rigid support structure. Moreover, the support structure of each wheel 6 and 8 becomes simple, and an inexpensive rice transplanter can be constituted.

The transmission unit 5 of the transmission case M
The input shaft 60 is protruded laterally from the first shaft 1, and power is transmitted to the pulley 61 fixed to the input shaft 60 via the belt 48. The belt 48 for transmitting the power of the engine E and the transmission case M are connected to each other. A power transmission path that is arranged on a substantially straight line and transmits power to the wheels 6 and 8 has a space-saving and efficient arrangement.

As described above, the transmission case M which extends long in the front-rear direction is disposed at the front and rear high and low positions, and the engine E
Of each wheel 6 via a power transmission path that distributes the power of the vehicle linearly.
-By enabling power transmission to 8, the power transmission path can be arranged in a space-saving and efficient arrangement, and the traveling vehicle 1
Can be simplified, the traveling vehicle 1 can be downsized, and a rice transplanter suitable for various fields can be configured. In addition, by reducing the size of the traveling vehicle 1, it is possible to reduce the cost.

A PTO shaft 62 is supported at the rear of the transmission section of the transmission case M.
2 drives the planting section 1 via the universal joint shaft
5 is transmitted.

Next, the support structure of the body frame F mounted on the transmission case M for suspending the wheels 6, 8 will be described. As shown in FIG. 3, in the middle of the main frame 2.2 above the front axle case 5.5, a support bracket 8 is provided below the main frame 2.2.
A fixed plate 82 is fixed to the support bracket 81, and the fixed plate 82 is arranged on the front surface of the front axle case 5. On the other hand, a boss 5a having an axial center in the front-rear direction is arranged on an upper portion of the front axle case 5, and a fixing plate 82 is fixed to a front portion of the front axle case 5 by a bolt 83 screwed into the boss 5a. The front part of the body frame F is fixed to the front axle case 5.

A rear connecting frame 85 formed of a pipe body is fixedly provided at the rear of the main frames 2 and 2, and the other end of the rear connecting frame 85 extends to a position near the rear lower axle case 7. The fixing plate 86 is fixed to the end of the rear connecting frame 85. The fixing plate 86 is a plate having a triangular shape in a side view, and a hole is formed at an end of the fixing plate 86 so that a bolt can be inserted. On the other hand, in the rear axle case 7, FIG.
As shown in FIG. 5, a boss 7 opening a screw hole in the left-right direction.
The fixing plate 86 is arranged on the side of the boss portions 7a and 7a, and the holes of the fixing plate 86 are formed in the boss portions 7a.
A bolt is screwed in from the side so that the screw hole of a coincides with the axis, and the fixing plate 86 and the boss 7a are fixed. Therefore, the rear end of the main frame 2 and the rear end of the transmission case M are connected via the rear connection frame 85, and the vehicle body F, the transmission case M and the rear connection frame 85 form a triangular traveling vehicle. 1 is formed. The transmission case M has an elongated shape and is formed in a tubular shape as shown in a sectional view shown in FIG.
. 95 are formed, the section modulus is increased, and a rigid case is formed. Thus, a rigid high integral frame for suspending the wheels 6 and 8 is formed.

Next, the structure of the lifting link mechanism 27 for mounting the planting section 15 so as to be able to move up and down will be described. That is, as shown in FIGS. 1 and 5, the lifting link mechanism 27 is configured such that the hitch 24 of the planting portion 15 that is supported to be able to swing right and left can be raised and lowered using a parallel link. Top link 2 which is a parallel link on the upper left and right sides of the hitch 24
5 and 25 are pivotally supported, and lower links 26 and 26, which are parallel links, are pivotally supported on the left and right sides of the lower portion of the hitch 24.
The lower links 26, 26 are provided with lift arm 90, 90 bases fixed on the inner surface of the front end,
90 protrudes vertically with respect to the direction in which the lower link 26 is disposed. Also, the left and right lift arms 90.9
The interval of 0 becomes narrower toward the distal end, and the rod front part of the lifting cylinder 28 is connected to a position between the distal ends.
Reinforcing links 91 are connected between the distal ends of the lift arms 90 and the rear ends of the lower links 26 to increase the rigidity of the lower links 26.

The lifting mechanism is pivotally supported at the rear of the integrated frame of the traveling vehicle 1. That is, the arms 92 are projected rearward from the rear portion of the main frame 2.2, the pins 93 are horizontally provided on the left and right arms 92, 92, and the front ends of the top links 25 are pivotally supported by the pins 93. . Further, a pivot pin 94 is provided horizontally in the front and rear part of a rear connecting frame 85 that connects the rear part of the transmission case M and the main frame 2, and the left and right ends of the pivot pin 94 have lower links 26 and 26 front ends. Are pivotally supported, and the rear connecting frame 85 of the integral frame of the traveling vehicle 1 is also used as a supporting portion of the elevating mechanism, and has a simple configuration without requiring a special supporting frame.

[0027]

As described above, the present invention has the following advantages. 2. A rice transplanter according to claim 1, wherein a planting portion is disposed at the rear of the vehicle body so as to be able to move up and down. A case is fixed and a rear axle case is formed at the rear, and the front axle case and the rear axle case are
Is integrated with the transmission case M, the power transmission configuration for transmitting power to each wheel can be simplified, the power transmission assembling work can be simplified, and the cost is reduced accordingly. As a result, the configuration for supporting each wheel is simplified, and an inexpensive rice transplanter can be constructed.

[Brief description of the drawings]

FIG. 1 is an overall side view of a small riding rice transplanter having a frame that is a pipe body.

FIG. 2 is a partial plan view of the same overall plan view.

FIG. 3 is a side sectional view showing a front upper portion of the small riding rice transplanter.

FIG. 4 is a sectional view of a transmission case.

FIG. 5 is a rear view showing a body frame pivotally supporting the lifting link mechanism.

FIG. 6 is a front sectional view of a body cover integrally formed by hollow molding.

FIG. 7 is a partial plan cross-sectional view showing a configuration in which an intermediate hollow molded vehicle body cover is bent.

[Explanation of symbols]

 F Airframe M Transmission Case 1 Vehicle 5 Front Axle Case 6 Front Wheel 7 Rear Axle Case 8 Rear Wheel

Claims (1)

(57) [Claims] 1. A riding rice transplanter having a planting portion arranged at the rear of the body so as to be able to move up and down, a transmission case extending in the front-rear direction substantially at the center of the body at the left and right , and a front portion of the transmission case. the front axle case fixedly to form a rear axle case to the rear in the said front axle casing
The rear axle case and the transmission case are integrated
Riding rice transplanter characterized by having a unique configuration .