JPH09328018A - Powertrain structure of work vehicle - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To collect dust that has fallen from the dust protector of a radiator for engine cooling to the bottom surface of a wind guide passage so as not to fall outside the machine at all times, and to easily remove it during cleaning. To SOLUTION: A bottom surface 26 of a wind guide passage 24 and a radiator 19
A dust outlet 27 is provided between the upper and lower ends, and an inclined surface portion 26a for guiding the dust on the bottom surface to the dust outlet 27 is provided at the radiator-side end of the bottom surface 26. A lid portion 21d is provided at an end portion of the dust protector 21 of the radiator 19. When the dust protector 21 is attached, the lid portion 21d closes the dust outlet 27 to prevent dust from coming out, and when the dust protector 21 is removed or the rising operation is performed, the lid portion 21d causes the dust outlet 27 to be removed.
Open.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prime mover structure of a work vehicle, which is provided with a dust protector, which is detachable in a direction along the radiator intake surface, on the intake surface side of an engine cooling radiator.

[0002]

2. Description of the Related Art If a gap is formed between a dust-preventing member and a member forming an air guide passage for supplying cooling air to an engine cooling radiator in the above-mentioned drive section, the action of sucking the cooling air into the air guide passage is reduced. As a result, the cooling efficiency may decrease. If dust such as grass is dropped from the dust protector by stopping the engine and the cooling air suction force is lost, the dust may drop through the gap to the outside of the machine.
At that time, even if the vehicle does not fall out of the machine and falls on the bottom surface of the wind guide path, a problem such as falling out of the machine through a gap occurs during traveling. For this reason, conventionally, the bottom surface of the air guide passage and the dust protector are formed so that there is no gap between them, and dust such as grass cutting may drop from the dust protector when the engine is stopped. However, the dust was supposed to fall and collect on the bottom of the air duct.

[0003]

Conventionally, when dust is collected in the air guide passage as described above, when the dust protector is removed from the radiator and cleaned, cleaning work for the dust is also performed, or the dust is collected. It was removed by doing special cleaning work for, and it was troublesome. An object of the present invention is to provide a prime mover structure of a work vehicle that can efficiently cool a radiator and prevent dust from spilling while facilitating removal of dust from an air guide passage.

[0004]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] In a prime mover structure of a work vehicle, which is equipped with a dust protector detachable in a direction along the radiator intake surface on the intake surface side of the engine cooling radiator, a bottom surface of an air guide passage to the radiator is provided. , A dust outlet is provided between the radiator and the radiator, and a lid portion for opening and closing the dust outlet is provided on the dust protector to guide the dust on the bottom face to the dust outlet at the radiator side end of the bottom face. It has an inclined surface portion.

[Operation] When the dust protector is attached, the lid of the dust protector closes the dust outlet. Therefore, the dust protector and the bottom surface of the air guide path are in contact with each other, and the cooling air suction force efficiently acts on the air guide path to efficiently supply the cooling air to the radiator. Moreover, even if dust falls from the dust protector, it will not be spilled outside the machine because it will collect on the bottom of the air duct. When the dustproofing device needs to be cleaned and the dustproofing device is removed, the lid part of the dustproof device is also removed and the dust outlet is opened. Therefore, if dust is collected in the air duct,
The dust spontaneously exits from the dust outlet due to the fall guide by the inclined surface portion. Also, even if dust collects in the air duct and it is necessary to remove it, you should remove the dust protector,
Even if it is not removed, if the specified stroke is moved in that direction, the lid part will also come off or move and the dust outlet will open, and dust will spontaneously come out of the dust outlet due to the fall guide by the inclined surface part. Go.

[Effect] Normally, the dust outlet can be closed to cool the radiator efficiently, and dust spillage can be avoided, while removing the dust protector or operating in that direction to guide the radiator easily and quickly. Remove dust from the airways,
It is now possible to easily eliminate defective ventilation due to dust.

The structure, operation and effect of the invention according to claim 2 are as follows.

[Structure] In the structure of the invention according to claim 1, the inclined surface portion of the bottom surface is supported so as to be vertically swingable about an axis located on the side opposite to the dust outlet side.

[Operation] When it is difficult to open the dust outlet by operating the dust protector due to dust adhering to the bottom surface or forming a large lump, the inclined surface portion is swung back and forth. The dust can be easily discharged by vibrating the dust or lowering the inclined surface portion to enlarge the dust discharge port.

[Effect] Not only by opening the dust outlet by operating the dust protector, but also by applying vibration to the dust and expanding the dust outlet, the dust can be discharged easily regardless of the accumulation condition. I can do it now.

The structure, operation and effect of the invention according to claim 3 are as follows.

[Structure] In the structure according to the second aspect of the present invention, the inclined surface portion is biased upwardly and swingingly, and is biased against the lid portion that closes the dust discharge port.

[Operation] Even if the inclined surface portion is not raised or lowered by a manual operation, the inclined surface portion is automatically raised due to the upward urging force and dusts only by releasing the operating force after the descending operation. It is possible to improve the sealing property between the both by applying vibration or bringing the inclined surface portion into contact with the dustproof tool by the upward biasing force.

[Effect] Dust can be easily removed from the viewpoint of the operation of giving vibration to dust. Then, what is capable of imparting vibration and expanding the dust outlet can be obtained in a state where the radiator is efficiently cooled also in terms of the sealing property between the bottom surface of the air guide passage and the dust protector during normal times.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a pair of left and right idle front wheels 1 and 1 and rear drive wheels 2 and 2 are configured to be self-propelled, and an engine E and an engine E are provided at the front of the machine body. A mower 6 having a cutter 6a that rotates around the vertical axis between the front and rear wheels of a self-propelled vehicle that includes a driving section having an engine bonnet 3 and a driving section having a steering handle 4 and a driving seat 5 at the rear of the vehicle. Is connected so that it can be moved up and down via a link mechanism 8 operated by a lift cylinder 7, and is configured to transmit power from a mission case 9 of the self-propelled aircraft to a mower 6 via a rotating shaft 10. A riding mower is constructed.

As shown in FIG. 1, the engine bonnet 3 forms a first bonnet portion 3a forming a lower portion of a front chamber portion of a driving chamber for accommodating the engine E and the like, and an upper portion of the front chamber portion. Second bonnet part 3
b, the bonnet portions 3a to 3c of the third bonnet portion 3c forming the rear chamber portion of the driving portion chamber. The first bonnet portion 3a is formed so as to mainly cover the lateral sides of the engine E and its accessories and is fixed to the machine body frame 11. The second bonnet portion 3b is formed so as to mainly cover the upper side of the engine E and its accessories, and the first bonnet portion 3a is supported on the front end side so as to be rotatable about an axis in the lateral direction of the machine body. It is possible to swing up and down around its axis to open and close. The rear bonnet portion 3c is provided with a column 12 of the steering wheel 4, and a gear type steering mechanism 13 that is configured to include the column 12 and transmit the rotational operation force of the steering wheel 4 to the front wheels 1 as a steering operation force. Is a bonnet portion made of resin so as to be embedded inside, and the upper and lower hook portions 3d and 3e on the front side are locked to the support pins 14a and 14b supported by the first bonnet portion 3a as shown in FIG. , The rear connecting part 3
By connecting f to the mounting bracket 15 supported by the machine body frame 11 by bolts, it is fixed across the first bonnet portion 3a and the machine body frame 11.

As shown in FIG. 2, intake ports 16 and 17 for engine cooling air are provided at the rear end and the upper part of the third bonnet portion 3c, and an exhaust port 18 is provided at the front end of the first bonnet portion 3a. By constructing the engine cooling structure, the engine E can be cooled.

That is, a radiator 19 for cooling the engine is arranged on the rear side of the body of the engine E mounted on the front end portion of the body frame 11, and a partition plate 20 provided around the radiator 19 causes the radiator 19 and the engine bonnet 3 to be separated. To fill the space between the front side where engine E is located and the radiator 1
While partitioning with the rear space where the intake surface side of 9 is located,
It is intended to prevent hot air after cooling the radiator 19 and hot air heated by the engine E from flowing into the intake surface side of the radiator 19. The upper side of the case in which the pillars 12 of the steering mechanism 13 are erected and the gear mechanism is internally housed, and as shown in FIGS. 2 and 4, the steering mechanism 13 and a dustproof member located on the intake surface side of the radiator 19. The resin-made first member formed to fill the gap with the tool 21 and prevent dust such as grass and grass from entering the driving chamber from below the machine body and supported on the upper surface side of the case of the steering mechanism 13. 1 the dustproof plate 22, the steering mechanism 13 and the third bonnet portion 3c are formed so as to fill up the gap to prevent dust such as grass and cut grass from entering the driving part chamber from below the machine body.
An air guide passage 24 for supplying cooling air to the radiator 19 is formed by each of the second dustproof plate 23 made of sheet metal supported on the upper surface side of the engine 3 and the engine bonnet 3. A cooling fan 25 is provided on the exhaust surface side of the radiator 19, and the cooling fan 25 is linked to the output shaft of the engine E by a belt. As a result, when the engine E is driven, the cooling fan 25 rotates and suctions the air guide passage 24, so that the cooling air flows into the engine bonnet from the intake ports 16 and 17, passes through the air guide passage 24, and then reaches the radiator. The engine cooling water inside the radiator 19 is cooled by being supplied to the radiator 19. At this time, even if dust such as cut grass and cut grass flows in together with the cooling air, the dust protector 21 removes the dust from the radiator 19
Remove it so that it does not get clogged by flowing into. The cooling air, which has been cooled by cooling the engine cooling water with the radiator 19 to raise its temperature, is blown by the cooling fan 25, so that the exhaust port 18
Flows out of the engine bonnet 3.

As shown in FIG. 2, the front side plate portion 22a of the first dustproof plate 22 extends downward from the rear side plate portion 22b connected to the case of the steering mechanism 13 to the front side of the machine body. In addition, the rear side plate portion 22b is formed by bending so that a gap is formed between the rear side plate portion 22b and the radiator 19. That is, the bottom surface 26 of the air guide passage 24 is formed by the upper surfaces of the first dustproof plate 22, the case of the steering mechanism 13, and the second dustproof plate 23.
The dust outlet 27 formed by the gap is formed between the radiator 19 and the bottom surface portion 26a of the radiator side end portion formed by the top surface of the front side plate portion 22a of the air guide passage bottom surface 26 on the bottom surface. It is formed on the inclined surface portion that guides the collected dust to the dust outlet 27.

As shown in FIGS. 2 and 3, the dustproof device 21 receives the dust and removes it from the cooling air 21a.
And a frame body 21b supporting this dustproof net 21a, and as shown in FIG.
It is configured to be attached to and detached from the intake surface side. That is,
The dust protector 21 is supported by a grip portion 21c formed by a bent portion on the upper end side of the frame body 21b, and the frame body 21b is
Insert the dust protector mounting rails 28 in the vertical direction of the machine body on both sides of the radiator 19 and insert the dust protector mounting rails 28 from above the radiator 19 to attach the dust protector mounting rails 2.
8 and guides it down along the air intake surface of the radiator 19 to be mounted, and then guides it along the dust protector mounting rail 28 to move up along the air intake surface of the radiator 19 and pull out from the dust protector mounting groove. It is removed by doing so.

As shown in FIG. 2 (a), when the dust protector 21 is mounted on the radiator 19, the lower end of the frame 21b abuts against and is supported by the end of the inclined surface portion 26a. I am doing it. As a result, the lower end portion 21d of the frame body 21b of the dust protector 21 is attached to the dust outlet 27.
When the dust protector 21 is attached, the dust outlet 27 is closed to prevent dust from falling from the bottom surface 26, and when the dust protector 21 is removed or a rising operation is performed, the dust outlet 27 is opened and the bottom surface 26 is opened. Allows dust to fall from.

That is, as shown in FIG. 2A, when the dust protector 21 is normally attached, the lid portion 21d closes the dust outlet 27. Therefore, even if the dust attached to the dust protector 21 is dropped by stopping the driving of the engine E and the suction force of the cooling fan 25 is lost, the dust is discharged from the dust discharge port 27. It does not fall outside and remains on the inclined surface portion 26a of the bottom surface 26 of the air guide passage. When the dust protector 21 is removed or the rising operation is performed in this state, as shown in FIG.
The lid portion 21d rises from the dust outlet 27 and the dust outlet 27 opens. Then, since the slanted surface portion 26a guides the dust accumulated on the slanted surface portion 26a to the dust discharge port 27, the dust accumulated on the slanted surface portion 26a naturally falls from the dust discharge port 27 to the outside of the machine, and the wind guide path. 24 dust can be removed.

As shown in FIGS. 2A and 4, a resin sealing material 2 is formed on the inner surface of the third bonnet portion 3c.
9 is projected obliquely downward so that it is located at a lower level toward the protruding end side. The sealing material 29 is integrally molded with the third bonnet portion 3c by molding at the same time when the third bonnet portion 3c is molded.
The fuselage frame 11 and the first of the third bonnet portion 3c
By assembling to the bonnet portion 3a, the second dustproof plate 23 is configured to come into contact with the upward side surface of the upward side surface and the downward side surface and slightly elastically deform. As a result, the sealing material 29 is pressed against the upper side surface of the second dustproof plate 23, and the third bonnet portion 3c and the second dustproof plate 23 are contacted.
It is sealed so that dust does not enter between the space and the space between the space and the space, and the suction force of the cooling fan 25 is not easily leaked.

[Another Embodiment] FIG. 6 shows a driving part including another embodiment, and the inclined surface portion 26 of the bottom surface 26 of the air guide passage.
Only the mounting structure of the first dustproof plate portion 22a forming a is different from the driving part of FIG. 2, and the other parts are the same as the driving part of FIG.

That is, the front side plate portion 2 of the first dustproof plate 22.
2a is formed as a separate component from the rear plate portion 22b, and is swingable to the rear plate portion 22b via a connecting pin 30 having a lateral axis axis P of the machine body arranged on the rear end side of the front plate portion 22a. Supported by. The spring 31 attached to the connecting pin 30 urges the front side plate portion 22a to rise and biases the free end side of the front side plate portion 22a against the lid portion 21d of the dust protector 21 with the dust outlet 27 closed. I am doing it.

An operation rod 33 is supported by a pair of upper and lower support arms 32 extending from the radiator 19 so as to be vertically slidable. When the operating rod 33 is lowered by the operating knob 33a located at the upper end of the operating rod 23,
The operation arm portion 33b extending from the lower end side of the operation rod 33 presses the upper surface side of the front side plate portion 22a, the front side plate portion 22a descends against the spring 31, and the operation on the operation rod 33 is released. Then spring 3
1, the front side plate portion 22a is the lid portion 2 of the dust protector 21.
The operating rod 33 is automatically returned to the original raised position where 1d abuts, to the original raised position before the lowering operation.

In other words, even if the dust protector 21 is detached or lifted to open the dust outlet 27, the dust accumulated in the inclined surface portion 26a adheres or becomes a large mass. If it is difficult to get out of the dust discharge port 27 due to the presence of the operation rod 33,
By operating 6a, dust is likely to come out. That is, when the operation rod 33 is lowered, the inclined surface portion 2
When 6a is oscillated downward, the dust outlet 27 is enlarged due to the descending of the inclined surface portion 26a, and the dust easily falls. In addition, the inclined surface portion 26
When the operation of the operation rod 33 is released after the rocking of a, the inclined surface portion 26 a is moved up by the spring 31 and collides with the lower portion of the radiator 19. Then, the impact of this collision causes the inclined surface portion 26a to vibrate, and this vibration makes it easier for dust to fall off the inclined surface portion 26a and drop.

The present invention can be applied to various vehicles such as agricultural tractors in addition to mowers, and these are collectively referred to as work vehicles.

[Brief description of drawings]

FIG. 1 is a side view of the entire riding mower.

FIG. 2 is a side view of the dust forming portion.

FIG. 3 is a perspective view of the dust protector.

FIG. 4 is a plan view of a steering mechanism arrangement portion.

FIG. 5 is a sectional view of a third bonnet partial arrangement portion.

FIG. 6 is a side view of a dust outlet forming portion according to another embodiment.

[Explanation of symbols]

 19 radiator 21 dust protector 21d lid part 24 air guide path 26 bottom surface 26a inclined surface part 27 dust outlet P shaft core

Claims (3)

[Claims] 1. A prime mover structure for a working vehicle, comprising a dust protector detachably attached in a direction along a radiator intake surface on an intake surface side of an engine cooling radiator, the bottom surface of an air guide passage to the radiator. And a radiator between the radiator and the radiator, and a lid portion for opening and closing the dust outlet is provided on the dustproof device, and the dust on the bottom surface is dropped to the dust outlet at the radiator side end portion of the bottom surface. The structure of the prime mover of a work vehicle equipped with a sloped surface for guiding. 2. The prime mover structure for a work vehicle according to claim 1, wherein the inclined surface portion of the bottom surface is supported so as to be vertically swingable about an axis located on the side opposite to the dust outlet side. 3. The prime mover structure for a work vehicle according to claim 2, wherein the inclined surface portion is biased upwardly and swingingly so as to be biased against the lid portion that closes the dust outlet.