JPH09300985A - Riding type transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationally dispose a water-cooled engine of large output without making a motive power part longitudinally large-sized in a riding type transplanter in which the motive part with an engine mounted therein. SOLUTION: A motive power part 19 in which a water-cooled engine body 31 and a radiator 33 cooled by a cooling fan 32 driven by engine output are horizontally arranged, is provided in front of an operating part. The radiator 33 and the cooling tan 32 are disposed being shifted backward in relation to the engine body 31, and an engine supporting frame 30 provided at a front part of a machine body is formed into hollow shape. The engine body 31 is mounted in the state of part of its lower part being dropped into this engine frame 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type transplanter in which a driving part having an internal engine is arranged in front of a driving part.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned riding type transplanter,
An air-cooled engine has been used for the engine installed in the driving part.

[0003]

In recent years, there has been a tendency for the work load to gradually increase as the number of threads and the number of auxiliary working devices such as fertilizer applicators have been increased in passenger riding type transplanters. Therefore, it is desired to mount an engine with high output in order to cope with an increase in load, and it has been considered to use a water-cooled engine.

By the way, in other riding-type agricultural work machines such as agricultural tractors and lawnmowers equipped with a water-cooled engine, a radiator is provided in front of or behind the engine body with the output shaft oriented in the front-rear direction. The radiator is cooled by a cooling fan driven by the engine output, and it is conceivable that the passenger-type transplanter will also have the same engine-mounted configuration.

However, when the water-cooled engine is arranged in the front-rear direction, the engine body, the cooling fan, and the radiator are arranged in the front-rear direction. As a result, the driving part is generally long in the front-rear direction, and the operating position is fixed. On the other hand, the front end of the driving part is extended to the front of the aircraft. That is, for the driver, it is predicted that the forward visibility will deteriorate and the workability will decrease. Further, when the driving part is extended forward, the length of the machine body becomes large, which causes a problem that the space required for changing the machine body direction at the ridge, so-called headland, becomes large.

The present invention has been made in view of such a point, and it is possible to rationally deploy a water-cooled engine having a large output without enlarging the driving part in the front and rear. Its main purpose is.

[0007]

[Structure, Action and Effect of Invention According to Claim 1]

(Structure) According to the first aspect of the present invention, the riding type transplanter has a driving section including a driving section in which a water-cooled engine body and a radiator cooled by a cooling fan driven by the engine output are arranged sideways. It is characterized in that it is provided in front of.

(Operation) According to the above characteristic structure, when the engine main body, the cooling fan, and the radiator are arranged sideways, the space required in the front-rear direction of the entire engine is small, and this water-cooled engine is incorporated. The length of the driving part in the front-rear direction can be short.

(Effect) According to the invention of claim 1,
A water-cooled engine with a large power output can be configured without compromising the forward visibility for the driver and without increasing the length of the aircraft, because the engine part with the water-cooled engine inside can be configured to be short in the front-back direction. This is useful for constructing a riding-type transplanter capable of increasing the work load.

[Structure, Action and Effect of Invention According to Claim 2]

(Structure) According to a second aspect of the present invention, in the riding type transplanter of the first aspect of the present invention, the radiator and the cooling fan are eccentrically arranged rearward with respect to the engine body. Is characterized by.

(Operation) Generally, since the cooling fan is arranged coaxially with the pump for circulating the cooling water provided in the upper part of the engine body, the radiator facing the cooling fan is naturally at a high position with respect to the engine body, The bonnet forming the driving part is formed in a shape that does not interfere with the radiator. In addition, since the driver's line of sight to the front of the aircraft, which is located behind the driving part, falls forward, the height of the front end position of the driving part affects the driver's line of sight. The height of the car does not significantly affect the driver's perspective. If the radiator and cooling fan located at a high position are eccentrically arranged rearward with respect to the engine body, the front part of the bonnet that houses the engine will be placed rearward with respect to the radiator and cooling fan. It can be made lower than that which is not deviated. That is, the driving part can be further inclined downward.

(Effect) The invention according to claim 2 achieves the above effect of the invention according to claim 1, and the driving part can be configured to have a further forward slant so as to have a good forward line of sight. It is effective in obtaining a riding type transplanter having excellent properties.

[Structure, Action and Effect of the Invention According to Claim 3]

(Structure) According to a third aspect of the present invention, in the riding type transplanter of the first or second aspect of the present invention, the engine support frame provided at the front of the machine body is formed in a hollow shape.
It is characterized in that a part of the lower part of the engine main body is dropped into the engine support frame and mounted.

(Operation / Effect) According to the above construction, the entire engine including the radiator can be arranged low, and the driving part in which the water-cooled engine is installed is constructed to be sufficiently low so that the forward visibility is further improved. I was able to.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a riding type rice transplanter which is an example of a riding type transplanting machine will be described with reference to the drawings. As shown in FIG. 1, the riding type rice transplanter has a basic structure in which a seedling planting device 3 is connected to a rear portion of a four-wheel drive riding traveling machine 1 via a four-link mechanism 2 so as to be able to move up and down. ing. Here, the four-link mechanism 2
Is constructed by installing the hydraulic cylinder 4 over a connection point between the front end of the upper link 2a and the fuselage side and a connection point between the rear end of the lower link 2b and the lower end of the rear link 2c. The four-link mechanism 2 is pulled up and raised by the shortening drive of the hydraulic cylinder 4, and the four-link mechanism 2 is lowered by its own weight by the extension operation of the hydraulic cylinder 4. Further, on the seedling planting device 3, a seedling stand 5 on which the seedlings are placed and reciprocally laterally moved with a constant stroke, a planting mechanism 6 for a plurality of rows for planting two plants by one rotation, and a paddy field are grounded. The float 7 and the like are provided, and the whole seedling planting device 3 is connected to the lower part of the rear link 2c in a freely rolling manner. The seedling planting device 3 is provided with a fertilizer application device 8 and a herbicide spraying device as necessary.

A transmission case 12 having left and right front wheels 11 that are steered by a power steering system is connected to a front portion of a body frame 10 of the passenger traveling body 1, and a rear portion of the body frame 10 is connected to a transmission case 12. A rear axle case 14 equipped with rear wheels 13 capable of independently braking right and left is connected, and a driver section 17 having a driver seat 16 mounted on a rear wheel fender 15 is provided on an upper portion of the body frame 10. In addition, a driving part 19 covered with a hood 18 is provided in the front part of the mission case 12. A front frame 20 is connected to the front portion of the machine body frame 10 so as to surround the driving portion 19 from the left and right sides and the front portion, and between the left and right portions of the hood 18 and the left and right portions of the front frame 20 in the driving portion 19. A boarding / alighting step 22 is provided to allow a worker to walk between the front of the machine body and the driving step 21 of the driving unit 17. A steering handle 23 for steering the front wheels is provided at the rear of the drive unit 19, and a fuel tank 24 is provided at a position above the rear of the drive unit 19. It should be noted that the battery 2 is provided below the right side getting on / off step 22.
5 is provided so that the battery 22 can be inspected by opening the cover 22a attached to the right side getting on / off step 22.

As shown in FIG. 7, an engine support frame 30 having a hollow shape in plan view is connected to the front portion of the mission case 12, and a water-cooled gasoline engine E is attached to the engine support frame 30. Is mounted and supported in an anti-vibration state. More specifically, the water-cooled engine E includes an engine main body 31 in which the output shaft 31a is laterally arranged so as to protrude in the left lateral direction, and the engine main body 31.
A cooling fan 32 disposed on the upper right lateral side of the engine and driven by the engine output, and a radiator 33 horizontally disposed upright on the right lateral side of the engine body 31 facing the cooling fan 32. A carburetor 34 is provided on the front side of the main body 31, and an exhaust manifold 35 is provided on the rear side.
Are provided respectively. An air cleaner 36 connected to the carburetor 34 via a hose 27 is provided above the engine body 31 via a mount 28, and an intake hose 37 led out from the air cleaner 36.
The open end 37a of the above is provided on the rear side of the radiator 33, and is configured to suck the outside air taken in from the intake port 38 formed on the right side surface of the bonnet 18 into the air cleaner 36. Further, a muffler 39 connected to the exhaust manifold 35 by a pipe is provided below the left step 22.

As shown in FIGS. 6 and 7, mounting brackets 40 and 41 are connected and fixed to the front and rear of the engine main body 31, and a fulcrum that is connected to the front mounting bracket 40 and the front portion of the engine support frame 30. The metal fitting 42 is vibration-coupled via a vibration-proof bush 43 and a fulcrum shaft 44 so as to be vertically rotatable about the horizontal axis P, and the rear mounting bracket 41 and the engine support frame 30 are provided at two left and right positions. It is vibration-proof connected via a vibration-proof rubber 45 that is inclined. A part of the lower part of the engine body 31 supported as described above is dropped into the hollow space of the engine support frame 30, and the engine body 31 is mounted low.

Here, the engine support frame 30
The left side portion 30L has a sheet metal welded structure and is formed into a three-dimensional structure that is recessed toward the engine side, and the lower portion of the flywheel 46 of the engine body 31 is inserted into the recessed portion. Note that, as shown in FIG. 7, a plurality of holes 30a are formed in the bottom surface of the left side portion 30L of the engine support frame 30 for weight reduction. The right side portion 30R of the engine support frame 30 is a square pipe formed in a hollow shape, and the lubrication pump 47 of the engine body 31 is provided in the hollow portion. A pump unit 48 in which a power steering pump and a hydraulic cylinder operating pump are connected in series is attached to the lower portion of the right side surface of the engine body 31, and the radiator 3 is attached.
It passes under 3 and projects laterally outward. A two-cylinder OHC (overhead camshaft) engine is used as the engine main body 31, and the cooling fan 32 is provided above the transmission case 49 provided on the right side surface thereof.

The front and rear mounting brackets 40 and 41 for mounting the engine are respectively extended rightward, and the radiator 33 is vibration-proof connected to both extension ends 40a and 41a thereof via a vibration-proof rubber 50. . Here, the radiator 33 and the cooling fan 32 are arranged so as to be displaced rearward with respect to the engine main body 31, respectively, and the outside air sucked by the cooling fan 32 from the intake port 38 on the right side surface of the bonnet passes through the radiator 33 and passes through the radiator 33. After cooling, the air becomes cooling exhaust air and passes behind the engine body 31. At this time, on the outside of the exhaust manifold 35, there is provided a wind guide cover 51 having an inlet opening toward the windward side.
The exhaust manifold 35 is configured to be efficiently cooled by the cooling exhaust air taken into the air guide cover 51. A part of the cooling exhaust air passing through the rear side of the engine body 31 is part of the exhaust port 5 formed on the left side surface of the bonnet 18.
2 is discharged to the outside of the machine, and another part of the cooling exhaust air flows into the lower part of the leftward and rightward step 22 and the muffler 3
9 will be cooled from the environment.

Further, as shown in FIGS. 5 and 10, the exhaust pipe 53 connecting the exhaust manifold 35 and the muffler 39 is connected to and supported by the upper portion of the engine body 31 via the stay 54. The exhaust pipe 5 is covered with the covers 55a and 55b, and a part of the cooling exhaust air is guided by the covers 55a and 55b.
3 is also cooled. As shown in FIG. 3, an open end 56a of the tail pipe 56 protruding from the rear end of the muffler 39 is provided with a notched pedal mount on the left side on the operation unit step 21 so that the main clutch pedal 57 can be inserted therethrough. It is arranged at a position deviated behind and laterally outward from the hole 58, and is designed so that exhaust gas exiting from the tail pipe 56 does not flow onto the step.

The output unit located on the left side of the engine body 31 and the input shaft 1 provided on the left lateral side of the mission case 12
2a is linked by a belt type continuously variable transmission 60,
The power transmitted by the continuously variable transmission 60 and the gear transmission mechanism in the transmission case 12 is transmitted to the front wheels 11 and the rear wheels 13, and the power extracted rearward from the transmission case 12 passes through the transmission shaft 61. It is adapted to be transmitted to the seedling planting device 3 via the above.

[Brief description of drawings]

[Fig. 1] Overall side view of the riding rice transplanter

FIG. 2 is a side view of a driving unit viewed from a left side of the fuselage.

FIG. 3 is a plan view of a driving unit.

FIG. 4 is a front view of a driving unit.

FIG. 5 is a rear view showing a cooling air passage of a driving unit.

FIG. 6 is an exploded perspective view around an engine.

FIG. 7 is an exploded perspective view of an engine mounting structure.

FIG. 8 is a side view showing an engine mounting structure.

FIG. 9 is a side view of the radiator support structure from the right side of the fuselage.

FIG. 10 is an exploded perspective view of a muffler cover structure.

[Explanation of symbols]

 17 Driving Section 19 Driving Section 30 Engine Support Frame 31 Engine Main Body 32 Cooling Fan 33 Radiator

Claims (3)

[Claims] 1. A ride-on type transplanter in which a driving part in which a water-cooled engine body and a radiator cooled by a cooling fan driven by the engine output are laterally arranged is provided in front of the operating part. 2. The ride-on type transplanter according to claim 1, wherein the radiator and the cooling fan are arranged so as to be displaced rearward with respect to the engine body. 3. The engine supporting frame provided in the front part of the machine body is formed in a hollow shape, and the lower part of the engine body is mounted on the engine supporting frame with the lower part thereof being dropped. Riding type transplanter.