JP3599479B2 - Riding transplanter - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a riding type transplanter in which a driving unit including an engine is provided in front of a driving unit.
[0002]
[Prior art]
From the past, in the above-mentioned riding type transplanter, an air-cooled type has been used as an engine installed in a driving part.
[0003]
[Problems to be solved by the invention]
2. Description of the Related Art In recent years, in a riding type transplanter, an auxiliary working device such as a multi-row or a fertilizer device has been increasingly installed, and the work load tends to gradually increase. Therefore, it is desired to mount an engine having a high output to cope with an increase in load, and the use of a water-cooled engine has been studied.
[0004]
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 arranged in front or rear of the engine body with the output shaft facing forward and backward, and the engine output is A configuration in which a radiator is cooled by a driven cooling fan is adopted, and it is conceivable that a similar type of engine mounted configuration is adopted in a riding type transplanter.
[0005]
However, when the water-cooled engine is arranged in the front-rear direction, the engine body, cooling fan, and radiator are arranged back and forth, so that the prime mover is generally longer in the front-rear direction, and the position of the engine is fixed. The front end of the prime mover is extended forward of the fuselage. In other words, it is predicted that the driver has a poor view of the front and the workability is reduced. In addition, if the prime mover extends forward, the length of the aircraft increases, which causes a problem that the space required for turning the aircraft around the ridge, that is, the so-called headland becomes large.
[0006]
The present invention has been made in view of such a point, and an object of the present invention is to rationally deploy a water-cooled engine without increasing the size of a driving part back and forth.
[0007]
[Means for Solving the Problems]
[Structure, operation and effect of the invention according to claim 1]
(Configuration) The invention according to claim 1 is configured as follows in a riding type transplanter .
A riding type in which a driving unit including a water-cooled engine main body, a cooling fan driven by the engine main body, and a radiator cooled by the cooling fan is mounted on a hood provided in front of the operating unit. A transplanter,
An engine support frame is provided at the front of the fuselage, the engine support frame is configured in a hollow shape, a lower part of the engine body is dropped into the engine support frame, and the engine body is mounted on the engine support frame. In addition, the engine body and the radiator are arranged laterally with respect to the traveling machine body to form a driving unit that allows a driver to easily look forward and downward when seated in the driving unit .
[0008]
According to the first aspect of the present invention , when the engine body, the cooling fan, and the radiator are arranged side by side, the required space in the front-rear direction of the entire engine is small, and the water-cooled engine is mounted. The length of the prime mover in the front-rear direction can be short .
[0009]
(Effect) According to the first aspect of the present invention, the prime mover including the water-cooled engine can be configured to be short in the front-rear direction, so that the forward view for the driver is not deteriorated and the length of the body is increased. This makes it possible to mount a water-cooled engine with a large output without performing any operation, and is useful for configuring a riding type transplanter that can cope with an increase in the workload .
[0010]
[Configuration and Effect of the Invention According to Claim 2]
(Structure) In the invention according to claim 2, in the invention according to claim 1, a muffler is provided on a side of the engine body opposite to the radiator.
(Effect) The invention according to claim 2 exhibits the effect of the invention according to claim 1, and can effectively cool the muffler by effectively utilizing the cooling exhaust air after cooling the radiator.
[0011]
[ Configuration of the invention according to claim 3]
(Configuration) According to a third aspect of the present invention, in the second aspect of the present invention, the muffler is arranged on a laterally outer side of the engine support frame.
[0012]
[ Configuration of the invention according to claim 4]
(Configuration) In the invention according to claim 4, in the invention according to any one of claims 1, 2, and 3, the air cleaner is disposed above the engine body.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a riding type rice transplanter which is an example of a riding type transplanter will be described with reference to the drawings. As shown in FIG. 1, the riding 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 connects the hydraulic cylinder 4 to a connection point between the front end of the upper link 2a and the body side and a connection point between the rear end of the lower link 2b and the lower end of the rear link 2c. has been constructed erection to, quadruplicate link mechanism 2 by shortening the driving of the hydraulic cylinder 4 is increased pulling, so that the quadruplicate link mechanism 2 is its own weight lowered by extending action of the hydraulic cylinder 4. In the seedling planting apparatus 3, a seedling stand 5 on which the seedlings are placed and reciprocated horizontally with a constant stroke, a plurality of planting mechanisms 6 for planting two plants by one rotation, and a leveling of the planted rice field. The seedling planting device 3 is rotatably connected to a lower portion of the rear link 2c. The seedling planting device 3 is provided with a fertilizer application device 8 and a herbicide spraying device as necessary.
[0014]
A transmission case 12 having left and right front wheels 11 steered in a power steering manner is connected to a front portion of a body frame 10 of the riding traveling body 1. A rear axle case 14 equipped with a rear wheel 13 that can be braked is connected, and a driving unit 17 having a driving seat 16 mounted via a rear wheel fender 15 is disposed on an upper portion of the body frame 10. A driving portion 19 covered with a hood 18 is provided at a front portion of the transmission case 12. A front frame 20 is connected to a front portion of the body frame 10 so as to surround the driving portion 19 from the left and right and the front portion, and is provided 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. There is provided a getting-on / off step 22 that enables the worker to walk and move between the front of the fuselage and the driving step 21 of the driving unit 17. A steering wheel 23 for steering the front wheels is provided at the rear of the driving unit 19, and a fuel tank 24 is provided above the rear of the driving unit 19. Note that a battery 25 is provided below the right getting on and off step 22, and the battery 25 can be inspected by opening the cover 22 a attached to the right getting on and off step 22.
[0015]
As shown in FIG. 7, an engine support frame 30 having a hollow shape in plan view is connected to a front portion of the transmission case 12, and a water-cooled gasoline engine E is mounted on the engine support frame 30. Mounted and supported in state. More specifically, the water-cooled engine E is provided with an engine main body 31 having an output shaft 31a arranged laterally so as to protrude leftward and a right side upper portion of the engine main body 31 and driven by an engine output. A cooling fan 32 and a radiator 33 erected sideways on the right side of the engine body 31 so as to face the cooling fan 32, and a carburetor 34 is provided on the front side of the engine body 31, and An exhaust manifold 35 is provided on each side. An air cleaner 36 connected to the carburetor 34 via the hose 27 is provided above the engine main body 31 via the mount 28, and an open end 37a of an intake hose 37 derived from the air cleaner 36 is connected to a radiator 33. The air cleaner 36 is configured to be sucked into the air cleaner 36 from the air inlet 38 formed on the right side surface of the hood 18. In addition, a muffler 39 connected to the exhaust manifold 35 by piping is provided below the left getting on / off step 22.
[0016]
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 front mounting bracket 40 and a fulcrum fitting 42 connected to the front of the engine support frame 30. Are connected via a vibration isolating bush 43 and a fulcrum shaft 44 so as to be vertically rotatable about a horizontal axis P, and the rear mounting bracket 41 and the engine support frame 30 are inclinedly provided at two right and left locations. Anti-vibration connection is made via anti-vibration rubber 45. A part of the lower portion of the engine main body 31 supported as described above is dropped into the hollow space of the engine support frame 30, and the engine main body 31 is mounted low.
[0017]
Here, the left side portion 30L of the engine support frame 30 is formed in a three-dimensional structure recessed toward the engine by a sheet metal welding structure, and the lower portion of the flywheel 46 of the engine body 31 enters into the recessed portion. I have. As shown in FIG. 7, a plurality of holes 30a are formed on the bottom surface of the left side portion 30L of the engine support frame 30 to reduce the weight. The right side portion 30R of the engine support frame 30 is formed by forming a square pipe into a hollow shape, and a lubrication pump 47 of the engine body 31 is provided at 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 part of the right side surface of the engine body 31. The pump unit 48 passes under the radiator 33 and protrudes laterally outward. The engine body 31 uses a two-cylinder OHC (overhead camshaft) engine, and is provided with the cooling fan 32 above a transmission case 49 provided on the right side thereof.
[0018]
The front and rear mounting brackets 40, 41 for mounting the engine extend rightward, respectively, and the radiator 33 is vibration-isolated to both extending end portions 40a, 41a via vibration-isolating rubber 50. Here, the radiator 33 and the cooling fan 32 are respectively displaced rearward with respect to the engine body 31, and the outside air sucked from the intake port 38 on the right side of the bonnet by the cooling fan 32 passes through the radiator 33 and After cooling, the air becomes cooling exhaust air and passes behind the engine body 31. At this time, a wind guide cover 51 having an inlet extending toward the windward side is provided outside the exhaust manifold 35, and the exhaust manifold 35 is efficiently cooled by cooling exhaust air taken into the wind guide cover 51. It is configured to be. A part of the cooling exhaust air passing through the rear side of the engine body 31 is exhausted out of the machine through an exhaust port 52 formed on a left side surface of the bonnet 18, and another part of the cooling exhaust air flows into and out of the left side. The muffler 39 flows below the step 22 to cool the muffler 39 from the surroundings.
[0019]
As shown in FIGS. 5 and 10, an exhaust pipe 53 connecting the exhaust manifold 35 and the muffler 39 is connected to and supported by an upper portion of the engine body 31 via a stay 54, and the exhaust pipe 53 is provided with a cover 55a, A part of the cooling exhaust air is guided by the covers 55a and 55b to cool the exhaust pipe 53. 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 of 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 discharged from the tail pipe 56 does not flow onto the step.
[0020]
An output portion located on the left side of the engine body 31 and an input shaft 12a provided on the left side of the transmission case 12 are operatively connected by a belt-type continuously variable transmission 60, and the continuously variable transmission 60 and the transmission case 12 are connected. The power shifted by the internal gear transmission mechanism is transmitted to the front wheels 11 and the rear wheels 13, and the power taken rearward from the transmission case 12 is transmitted to the seedling planting device 3 via the transmission shaft 61. It has become so.
[Brief description of the drawings]
FIG. 1 is an overall side view of a riding type rice transplanter. FIG. 2 is a side view of a driving unit viewed from the left side of the machine. FIG. 3 is a plan view of a driving unit. FIG. 4 is a front view of a driving unit. FIG. 6 is an exploded perspective view around the engine. FIG. 7 is an exploded perspective view of the engine mounting structure. FIG. 8 is a side view showing the engine mounting structure. FIG. 9 is an aircraft showing a radiator support structure. Side view from right side [Fig. 10] Exploded perspective view of muffler cover structure [Explanation of reference numerals]
17 Driving unit 19 Drive unit
30 engine support frame 31 engine body 32 cooling fan 33 radiator
36 Air cleaner 39 Muffler
E engine

Claims (4)

A riding type in which a driving unit including a water-cooled engine main body, a cooling fan driven by the engine main body, and a radiator cooled by the cooling fan is mounted on a hood provided in front of the operating unit. A transplanter,
An engine support frame is provided at the front of the fuselage, the engine support frame is formed in a hollow shape, a lower part of the engine body is dropped into the engine support frame, and the engine body is mounted on the engine support frame. In addition, a riding type transplanter in which the engine body and the radiator are arranged laterally with respect to the traveling machine body to constitute a driving unit that allows a driver to easily look forward and downward when seated in a driving unit. The riding type transplanter according to claim 1 , wherein a muffler is provided on a side of the engine body opposite to a radiator. 3. The riding implant according to claim 2, wherein the muffler is disposed laterally outside the engine support frame. The riding type transplanter according to any one of claims 1, 2, and 3, wherein an air cleaner is provided above the engine body.

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