JPH09300986A - Drive part structure of riding type transplanter - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] In a driving part structure of a passenger transplanter in which a driving part having an engine installed therein is provided in front of a driving part, a water-cooled engine can be rationalized without increasing the size of the driving part in the front-rear direction. By deploying and ensuring the cooling performance in the driving part, it will be possible to make full use of the capacity of the water-cooled engine. A driving unit 19 provided in front of a driving unit 17.
Further, a water-cooled engine E in which a main body of the engine and a radiator 33 cooled by a cooling fan 32 driven by the engine output are laterally arranged is installed inside, and the radiator 33 and the cooling fan 32 are exhausted to the main body 31 of the engine. The manifold 35 is eccentrically disposed on the side where the manifold 35 is arranged, and the cooling exhaust air that has passed through the radiator 33 is configured to mainly flow on the exhaust manifold arrangement side of the engine body 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving part structure of a riding type transplanter in which a driving part containing an engine is provided 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.

Further, it is desirable to make the size as small as possible in order to form a prime mover with good forward visibility, but in this case, unless the thermal balance in the prime mover is sufficiently taken into consideration, overheating is likely to occur and the water-cooled engine is likely to overheat. There is a risk that you may not be able to exert your full potential.

The present invention has been made paying attention to such a point, and a water-cooled engine is rationally provided without increasing the size of the driving part in the front and rear direction, and the cooling performance in the driving part is increased. The main purpose is to ensure that the water-cooled engine can fully utilize its capabilities.

[0008]

[Means for Solving the Problems]

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

(Structure) The structure of the driving part of the riding type transplanter of the invention according to claim 1 is characterized in that the driving part provided in front of the driving part has:
A water-cooled engine in which a main body of the engine and a radiator cooled by a cooling fan driven by the engine output are laterally arranged is installed inside, and the radiator and the cooling fan are arranged on the side where the exhaust manifold is arranged with respect to the main body of the engine. It is characterized in that the cooling exhaust air passing through the radiator is eccentrically arranged so as to mainly flow on the exhaust manifold arrangement side of the engine body.

(Operation) According to the above characteristic structure, when the engine 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. Also, since most of the cooling exhaust air of the radiator flows on the exhaust manifold arrangement side of the engine body, the high temperature exhaust manifold is cooled by this cooling exhaust air, and heat retention around the exhaust manifold is reduced.

(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. In addition, by rationally disposing the engine body, radiator and cooling fan, the exhaust manifold, which is the high temperature part of the engine body, can be effectively cooled by using the cooling exhaust air after cooling the radiator, and within the driving part. It is possible to maintain a good thermal balance and to fully exert the function of the water-cooled engine.

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

According to a second aspect of the present invention, in the passenger transplanter of the first aspect of the invention, cooling exhaust air passing through the radiator is provided outside the exhaust manifold along the outer peripheral portion of the exhaust manifold. It is characterized by the provision of a wind guide cover for fluidization.

(Operation) According to the above configuration, the cooling exhaust air passing through the radiator can be efficiently flowed along the outer peripheral portion of the exhaust manifold, and the radiant heat from the exhaust manifold can be blocked by the air guide cover. it can.

(Effect) The invention according to claim 2 can exert the above effect of the invention according to claim 1 and can further maintain a good thermal balance in the driving part.

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

(Structure) In the invention according to claim 3, in the invention according to claim 2, a muffler, which is connected to the exhaust manifold through an exhaust pipe, has a lateral outer side of the driving portion on the side opposite to the radiator. It is arranged below the boarding / alighting step arranged at 1, and the boarding / alighting step is arranged at a height corresponding to an intermediate portion of the height of the radiator.

(Operation) According to the above configuration, the lower part of the air passage through which the cooling exhaust air flows after cooling the radiator faces the lower side of the boarding / alighting step, and the cooling exhaust air also reaches the lower side of the boarding / alighting step. Flows easily. Therefore, the muffler arranged below the boarding / alighting step is cooled by the cooling exhaust air.

(Effect) The invention according to claim 3 exerts the effect of the invention according to claim 2, and at the same time, effectively cools the muffler by effectively utilizing the cooling exhaust air after cooling the radiator. Therefore, exhaust noise can be reduced.

[Structure, Action and Effect of the Invention According to Claim 4]

(Structure) The invention according to claim 4 is the invention according to claim 3, wherein the muffler is disposed below the boarding / alighting step in a posture in which the muffler is exhausted rearward, and a tail pipe provided on the muffler is provided. It is characterized in that the open end is located rearward of the pedal mounting hole formed in the step on / off step.

(Operation) According to the above structure, the exhaust gas discharged from the tail pipe of the muffler does not flow upward from the pedal mounting hole of the getting on / off step and flow into the operating section. In particular, when the pedal mounting hole is provided closer to the engine than the tail pipe, the exhaust gas is diffused by the cooling exhaust air flowing near the muffler so as to move away from the pedal mounting hole.

(Effect) The invention according to claim 4 exhibits the above effect of the invention according to claim 3, and at the same time, the deterioration of the environment of the driving part can be avoided.

[0024]

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 which 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 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.

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 section 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 31 Engine Main Body 32 Cooling Fan 33 Radiator 35 Exhaust Manifold 39 Muffler 51 Wind Guide Cover 56 Tail Pipe 56a Open End 58 Pedal Mounting Hole

Claims (4)

[Claims] 1. A water-cooled engine in which a main body of an engine and a radiator cooled by a cooling fan driven by the engine output are laterally arranged in a driving portion provided in front of an operating portion, the radiator and The cooling fan is eccentrically arranged with respect to the side where the exhaust manifold is arranged with respect to the engine body, and the cooling exhaust air that has passed through the radiator is mainly configured to flow on the exhaust manifold arrangement side of the engine body. Structure of the moving part of the type transplanter. 2. A driving part of a riding type transplanter according to claim 1, wherein an air guide cover is provided outside the exhaust manifold to allow cooling exhaust air that has passed through the radiator to flow along an outer peripheral portion of the exhaust manifold. Construction. 3. A muffler communicatively connected to the exhaust manifold via an exhaust pipe is arranged below a boarding / alighting step arranged laterally outside of the prime mover on the side opposite to the radiator, and the height of the radiator is increased. The driving part structure of the riding-type implanter according to claim 2, wherein the step-on / off step is arranged at a height corresponding to an intermediate portion of the height. 4. The muffler is arranged below the step-on / off step in a posture in which it is exhausted rearward, and the open end of a tail pipe provided on the muffler is located at a position rearward of a pedal mounting hole formed on the step-on / off step. The driving part structure of the riding type transplanter according to claim 3, wherein the driving part structure is located.