JP2000296721A - Engine dustproof device of work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent accumulation of dust and dirt to an engine without arranging a dustproof cover on the engine by providing air blowing means capable of blowing air to an engine room separately from an engine cooling air blower. SOLUTION: A support plate 15 is arranged in a part of a hood 14 for forming the ceiling of an engine room, and air blowing means 16 for blowing air toward an engine in the engine room are arranged by two units on the support plate 15. These air blowing means 16 are provided with an air blowing case 18, a motor-driven fan 20 installed in the air blowing case 18 and louvers 22a, 22b, 22c being an airflow direction guide plate swingingly installed in a lower end part of the air blowing case 18 being the downstream of blowing air of the motor-driven fan 20. The motor-driven fan 20 of the air blowing means 16 is actuated by a power source battery of a work machine to blow air even at engine stopping time of the work machine. Air blowing can be turned on and off for a prescribed time regardless of rotation and stopping of the engine by providing a timer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof device for a working machine, and more particularly, to a dustproof device for a working machine which prevents dust from accumulating on an engine of the working machine.

[0002]

2. Description of the Related Art Grain, feed, and the like are used by using a working machine having an engine, such as a wheel loader and a hydraulic shovel.
Cargo handling work such as wood chips is performed. In the cargo handling work handling such materials, a large amount of light and floating dust is generated, and the dust also enters the engine room in which the engine is stored. Most of the dust that has entered the engine room is blown off by the cooling air of the radiator cooling fan of the engine cooling blower. However, dust is likely to accumulate on the cylinder block and cylinder head of the engine, as well as on the upper surface and recesses near the cylinder block and cylinder head. Since the engine is exposed to high-temperature parts such as the exhaust manifold, turbocharger, and exhaust pipe, make sure that dust does not accumulate and ignite and burn.
It is necessary to prevent the accumulation of dust. Therefore, a dustproof cover made of heat-resistant glass wool or the like is attached to an exhaust manifold, a turbocharger, an exhaust pipe, and a portion where dust easily accumulates.

[0003]

The conventional work machine of the above-described embodiment has the following problems to be solved.

(1) Dust-proof cover: Even when the dust-proof cover is attached, light and floating dust accumulates between the dust-proof cover and the engine, in a recess or the like that cannot be covered by the dust-proof cover, and accumulates dust. Difficult to prevent completely.
Therefore, it is necessary to remove the dust cover regularly or appropriately to clean the accumulated dust. The work of attaching and detaching and cleaning the dustproof cover is not easy because it is performed on the engine housed in the engine room.

(2) Durability of engine equipment: Heat is trapped in the part wrapped by the dustproof cover, which causes a decrease in the durability of the equipment, for example, a decrease in the durability of the turbocharger, deterioration of the gaskets, and the like. This may cause problems such as leakage and loosening of the tightening bolt.

(3) Heat radiation of the engine: By attaching the dustproof cover, the heat radiation performance and the cooling performance of the engine are deteriorated, which causes a decrease in the output of the engine. Therefore, it is necessary to increase the capacity of a cooling device such as a radiator.

[0007] (4) Floating dust: When the engine is stopped at the end of the cargo handling operation, the radiator cooling fan of the engine cooling blower stops, and the cooling air flowing to the engine stops. Therefore, the light floating dust drops and accumulates on the upper surface or the recess of the cylinder head or the like of the engine after the cooling fan stops. In addition, when the space between the radiator and the radiator cooling fan and the engine room is closed with a partition to reduce the noise emitted from the engine room, the cooling air does not flow through the engine room. Regardless of the rotation or stoppage of the engine, it drops on the engine and accumulates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem thereof is to provide an engine dust-proofing device for a working machine that can prevent the accumulation of dust on the engine without providing a dust-proof cover on the engine. It is to provide.

[0009]

According to the present invention, as an engine dustproof device for a working machine which solves the above technical problem, a blowing means capable of blowing air to an engine room in which the engine of the working machine is housed is used for engine cooling. An engine dustproof device for a working machine, which is provided separately from a blower, is provided.

The engine dust proofing device for a working machine according to the present invention is provided with an air blowing means capable of blowing air into the engine room even when the engine is stopped, separately from the engine cooling air blowing device. Then, the dust is blown off by the blowing to prevent dust from accumulating on the engine.

[0011] In a preferred embodiment, the blowing means blows air toward the engine. Further, the blower has a louver for controlling the direction of the blow, and the louver is attached so as to swing freely.

[0012] Then, the ventilation is directly directed to the engine to prevent the accumulation of dust. Further, the louver for guiding the wind direction is freely swung by the inclination, vibration, or the like of the work machine, thereby effectively preventing the accumulation of dust on the engine.

The blower has an electric fan. Further, the blower has a timer for controlling on / off of the blower.

Then, the electric fan of the blowing means is operated by the power supply battery of the work machine, and the air can be blown even when the engine of the work machine is stopped. Also, equipped with a timer, regardless of the rotation and stop of the engine of the work machine,
The air supply is turned on and off for a predetermined time.

[0015] The blowing means is disposed above the engine.

By blowing air toward the engine from above the engine, dust accumulated on the upper surface of the engine cylinder head or the like is effectively blown off.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a working machine having a dust loader according to an embodiment of the present invention; FIG. Will be described.

Referring to FIG.
The wheel loader shown by a symbol is a tire-type body main body 4, an operator's cab 6 disposed at the center of the body main body 4 in the front-rear direction (left-right direction in FIG. 1), and a rear part of the operator's cab 6 of the aircraft body 4 (FIG. Engine room 10 which is disposed on the right side of
And a working device 12 disposed in front of the cab 6 of the machine body 4 (to the left in FIG. 1) so as to be vertically swingable. At the tip of the working device 12, a bucket 13 for carrying out cargo handling work for grains, feed, wood chips, and the like is attached. At the rear end of the body 4, an engine cooling device 9 partitioned by an engine room 10 and a partition 13 is provided with a radiator 9 a and a radiator cooling fan 9 b which is a blower for cooling the engine.

Referring to FIG. 1 and FIG. 2 to FIG. 4, the engine 8 is disposed vertically in the front-rear direction of the body main body 4. At the upper portion in the approximate center of the engine 8 in the front-rear direction, there are provided accessory devices that become hot when the engine 8 rotates, such as an exhaust manifold 8a, an exhaust pipe 8b, and a turbocharger 8c. A support plate 15 is disposed in a portion of the hood 14 that forms a ceiling of the engine room 10. The support plate 15 has two blowing means 16 for blowing air toward the engine 8 in the engine room 10. The wheel loaders 2 are arranged side by side in the front-rear direction of the engine 8, that is, in the front-rear direction of the wheel loader 2, substantially above the center.

Referring to FIGS. 5 to 7 together with FIGS. 1 to 4, the blower means 16 includes a blower case 18,
An electric fan 20 attached to the blower case 18, and louvers 22 a, 22 b, and 22 c as wind direction guide plates that are swingably attached to the lower end of the blower case 18 on the downstream side of the blower of the electric fan 20. I have.

The blower case 18 has a cylindrical case body 18.
a, brackets 18b projecting from four locations for mounting the electric fan 20 on the center axis of the cylinder of the case body 18a with the rotation axes thereof substantially aligned, and a clamp 18c for fixing the electric fan 20. . The clamp 18c is attached to the bracket 18b by a bolt 18d and a nut 18e. Case body 18a
At the outer periphery of the lower end of the bracket, four L-shaped brackets 18f for attaching the blower case 18 to the support plate 15 are arranged at equal intervals in the circumferential direction, and a bolt insertion hole 18g is formed in the bracket 18f. ing.

The louvers 22a, 22b and 22c may be substantially the same, and are formed by attaching a shaft member 24 serving as a swing shaft to each of both ends of one long side of a rectangular plate member. . A pair of opposed plates 26a and 26b are attached to the lower end of the case body 18a.
Each of the plates 26a and 26b has three bearing holes 28 into which the shaft member 24 is rotatably inserted. Thus, the louvers 22a, 22b and 22c are swingably attached to the case body 18a via the pair of plates 26a and 26b.

The electric fan 20 includes a DC motor 20a,
Fan 20 attached to the output shaft of DC motor 20a
b, and when the DC motor 20a is energized and the fan 20b is rotationally driven, air is blown downward as indicated by an arrow 21 (FIG. 5). The DC motor 20a is connected to a power supply battery (not shown) of the wheel loader 2 via a timer 30 (FIG. 1) provided in the cab 6 (timer 30).
Will be described later in detail).

The support plate 15 is formed in a rectangular cross section by bending each of a pair of long sides thereof into a channel shape in cross section. The support plate 15 has an insertion hole 15 for inserting the case body 18a of the blower case 18.
a, insertion hole 15a for attaching case body 18a
4 for attaching the support plate 15 to a pair of brackets 17 a and 17 b (FIG. 2) provided on the engine 8.
The bolt insertion holes 15c (FIG. 3) are formed. The support plate 15 is disposed such that its upper surface is substantially the same as the upper surface of the hood 14. The support plate 15 is attached to the pair of brackets 17a and 17b by bolts 32. The blower 16 is attached to the support plate 15 by aligning the bolt insertion hole 18g of the bracket 18f and the bolt insertion hole 15b of the support plate 15 with a bolt 36 and a nut 38. The hood 14 of the engine compartment 10 has a rectangular hole 14a for accommodating the support plate 15.

A timer 30 provided in the cab 6 arbitrarily sets on / off of energization between the electric fan 20 and the power supply battery. For example, the engine 8 of the wheel loader 2 is operated by an engine switch (not shown) of the cab 6.
When the operation is stopped, the electric fan 20 is energized for a predetermined time in response to the signal. In a working machine such as the wheel loader 2 shown in FIG. 1 in which the cooling air of the cooling device 9 does not flow into the engine room 10 due to the partition wall 13, the electric fan 20 is provided at appropriate intervals for a predetermined time even while the engine 8 is rotating. So that it is energized. The setting of this time is determined depending on the situation of dust entering and accumulating in the engine room 10 in the cargo handling operation.

Referring to FIGS. 8 and 9, another embodiment of the blowing means will be described. In this embodiment, the three electric fans 20 are collectively attached to the three blower cases 40.

The blower case 40 includes a pair of rectangular plate members 4.
2a and 42b, rectangular plate members 44a, 44b, 44c, 44d and 44e are disposed at intervals from one end side of the plate members 42a and 42b in the longitudinal direction to the other end side and are integrally joined. , Plate members 42a and 42b and plate member 4
4a, 44b, 44c, 44d and 44e form three rectangular cylindrical spaces for accommodating the electric fans 20 of the blowing means one by one. A bracket 46 and a clamp 47 for attaching the electric fan 20 are provided in each of the accommodation spaces.
8b and the clamp 18c (FIG. 6). At the lower end of the space for accommodating the electric fan 20, louvers 48a, 48b and 48c are provided with plate members 44a, 44b,
The louvers 22a, 22b and 22c (FIG. 5) of the blowing means 16 are swingably attached to 44c, 44d and 44e. Brackets 50 a and 50 b for attaching the blow case 40 to the pair of brackets 17 a and 17 b provided on the engine 8 are provided at both ends in the longitudinal direction of the blow case 40. In addition, the brackets 50a and 50b are configured such that the blower case 40 has the support plate 15 and the bracket 17a.
And 17b.

The operation of the engine dustproof device for a working machine as described above will be described.

(1) Prevention of Dust Deposition on Engine: The engine dust proofing device for a working machine according to the present invention blows off the dust deposited on the engine by the blowing of the blowing means to prevent the dust deposition on the engine. The dust blown away,
Since the oil pan and the like having a relatively low temperature are deposited on the bottom of the engine room where the oil pan is located, there is no fear of ignition. Dust deposited on the bottom of the engine compartment may be removed by removing the bottom plate, or by cleaning and removing the dust from a maintenance opening provided in the bottom plate.

(2) Ventilation: The ventilation is directed to the engine, and the swingable louver swings due to the inclination and vibration of the work machine without providing a driving means, thereby changing the wind direction. Blows off the dust that accumulates on the surface. By blowing air toward the engine from above the engine, dust accumulated on the upper surface of the engine can be effectively blown off.

(3) Electric fan: By using an electric fan for the blower, the blower can be operated by the power supply battery of the work machine. Then, the air can be turned on / off by the timer regardless of the rotation and stop of the engine of the work machine. For example, in a working machine in which the radiator cooling air flows in the engine room while the engine is rotating, the blower can be operated for a predetermined time after the engine is stopped. Further, in a working machine in which the cooling air does not flow in the engine room even during the rotation of the engine, the blowing means can be appropriately operated during the rotation of the engine or for a predetermined time during the rotation of the engine and after the engine is stopped.

(4) Removal of dust cover: Since dust can be prevented from being accumulated on the engine by the blowing means, the dust cover can be omitted. Therefore, it is necessary to perform a difficult cleaning work by attaching and detaching the dust cover, a problem that the engine output is reduced by heating the engine, a problem that requires a large-capacity cooling device, and furthermore, the heat radiation of the engine is deteriorated, and Problems such as reduced durability can be eliminated.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be variously modified or modified within the scope of the present invention. It is.

(1) Number of Blowers: In the embodiment of the present invention, two (FIG. 2) or three (FIG. 8) blowers are shown. The size may be changed as appropriate according to the size of the engine room, the size of the engine housed in the engine room, the degree of dust generated at the operation site of the work machine, and the like.

(2) Arrangement position of blower means: In the embodiment of the present invention, the blower means is arranged in the hood portion above the engine in the engine room.
It can be appropriately changed so that air is blown into the engine room from the side wall portion of the engine room or a portion away from the engine room.

(3) Louver: In the embodiment of the present invention, the louver provided in the blower means swings freely, but may be an adjustable type which adjusts and fixes the wind direction in a predetermined direction. . In addition, it is desirable that the size and the number of the louvers be arranged as close to the engine as possible so that the blowing means is effectively blown to the engine.
Therefore, the size of the louver may be appropriately changed depending on the portion where the louver is disposed, for example, as shown in FIG.

[0037]

According to the dustproof device for a working machine constructed according to the present invention, there is provided an engine dustproofing device for a working machine capable of preventing accumulation of dust on the engine without providing a dustproof cover on the engine. Is done.

[Brief description of the drawings]

FIG. 1 is a side view of a wheel loader that is a typical work machine including a dustproof device for a work machine configured according to the present invention.

FIG. 2 is an enlarged side view of the engine compartment shown in FIG.

FIG. 3 is a plan view seen in the direction of arrows AA in FIG. 2;

FIG. 4 is a front view as seen in the direction of arrows BB in FIG. 2;

FIG. 5 is an enlarged cross-sectional view of a portion of a blower shown in the direction of arrows CC in FIG. 2;

FIG. 6 is a plan view of a part of the air blowing means as viewed in a direction indicated by an arrow DD in FIG. 5;

FIG. 7 is a front view of the louver portion viewed in the direction of arrows EE in FIG. 5;

FIG. 8 is a side view of a blower of another embodiment.

FIG. 9 is a plan view seen in the direction of arrows FF in FIG. 8;

[Explanation of symbols]

 2: Wheel loader (work machine) 8: Engine 10: Engine room 15: Support plate 16: Blower 20: Electric fan 22a, 22b, 22c: Louver 30: Timer 40: Blower case 48a, 48b, 48c: Louver

Claims (7)

[Claims] 1. An engine dust protection device for a work machine, comprising: a blower capable of blowing air into an engine room in which an engine of the work machine is stored, separately from a blower for cooling the engine. 2. The dustproof device according to claim 1, wherein the blower blows air toward the engine. 3. The dustproof device for a working machine engine according to claim 1, wherein said blowing means includes a louver for controlling a direction of the blowing. 4. The engine dustproof device for a working machine according to claim 3, wherein the louver is attached to be freely swingable. 5. The air blowing means includes an electric fan.
An engine dustproof device for a working machine according to any one of claims 1 to 4. 6. The engine dust protection device for a working machine according to claim 1, wherein said blowing means includes a timer for controlling on / off of the blowing. 7. The dustproof device for a working machine engine according to claim 1, wherein said blowing means is disposed above said engine.