JP2002225572A - Air intake part structure of work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the necessary strength as a dust-proof wall even adopting a resinous thing to a frame of the dust-proof wall. SOLUTION: In an air intake structure of a work machine in which a dust preventing net 27 for preventing suction of dust from an air intake port 25 is prepared in a resinous frame 26 in which the air intake port 25 for taking-in cooling outer air followed by drive of a cooling fan 18 is formed and a dust- proof wall 28 is constituted, a porous plate 47 which is bent and formed in a waveform in which recesses 47A and projections 47B are lined sideways is adopted as the dust preventing net 27, and recesses 26A and projections 26B which are fitted to the porous plate 47 are formed in the peripheral inner face part of the air intake port 25 in the frame 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin frame provided with an air inlet through which cooling air is taken in by driving a cooling fan, and a dustproof net for preventing dust from being sucked from the air inlet. And a suction unit structure of a working machine having a dustproof wall.

[0002]

2. Description of the Related Art Conventionally, in the air intake portion structure of a working machine as described above, a frame made of sheet metal has been adopted as a frame of a dust-proof wall. However, in recent years, it is lighter than a sheet metal. It has been considered to adopt a resin material that is advantageous in terms of moldability.

[0003]

However, the adoption of a resin frame makes it possible to reduce the weight and simplify the structure of the dust-proof wall, but at the same time, it causes a disadvantage that the strength of the dust-proof wall is reduced. .

[0004] It is an object of the present invention to ensure the required strength of a dust-proof wall while employing a resin-made frame for the dust-proof wall.

[0005]

[Means for Solving the Problems] [Structure] In order to achieve the above object, according to the first aspect of the present invention, a resin having an intake port for taking in outside air for cooling when a cooling fan is driven. In a suction frame structure of a working machine having a dust-proof wall equipped with a dust-proof net for preventing dust from being sucked from the suction port, a wavy shape in which irregularities are arranged in a horizontal direction as the dust-proof net. A perforated plate formed by bending into a rectangular shape was adopted, and irregularities fitting the perforated plate were formed on the inner surface of the frame body around the intake port.

According to the first aspect of the present invention, the rigidity of the dust-proof net itself is higher than when a flat plate-shaped perforated plate is used as the dust-proof net, and the dust-proof net is framed. By fitting into the unevenness of the frame, the frame body and the dustproof net can be integrated in a state where the intake port of the frame body is closed with a high-strength dustproof mesh while increasing the joint area between them. It is possible to improve the strength as a dust-proof wall while adopting a lightweight frame made of resin which is advantageous in terms of moldability.

In addition, compared with the case where a flat plate-shaped perforated plate is used as the dust-proof net, the air intake area of the dust-proof net becomes large, and the wind speed of the cooling outside air taken in from the air inlet of the frame through the dust-proof net. Can be suppressed low, so that the occurrence of clogging due to dust adhering to the dustproof net can be effectively suppressed.

[Effect] Therefore, the required strength of the dust-proof wall can be sufficiently ensured while adopting a resin-made frame for the dust-proof wall to reduce the weight and simplify the configuration of the dust-proof wall. In addition to this, overheating can be prevented while reducing the frequency of maintenance for the intake section.

[Structure] According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a resin frame having an air inlet through which cooling air is taken in with driving of the cooling fan. In a suction unit structure of a working machine having a dustproof wall equipped with a dustproof net for preventing dust from being sucked from the air inlet, a plurality of air inlets are formed in the frame, and the dustproof net is formed. A perforated plate bent and formed into a wave shape in which irregularities are arranged in a horizontal direction over the entire intake port is adopted, and irregularities that fit with the perforated plate are formed on inner peripheral portions of the frame body around each intake port. .

According to the second aspect of the present invention, the rigidity of the dust-proof net is higher than that of a case where a flat plate-shaped perforated plate is used as the dust-proof net. By fitting into the irregularities of the frame, the frame body and the dustproof net are closed with a single high-strength dustproof net at each intake port of the frame body, and the dustproof net is supported by the inner surface around each intake port Can be integrated in a state where the joint area is even larger, effectively improving the strength as a dust-proof wall while adopting a lightweight frame made of resin that is advantageous in terms of moldability. I can plan.

Further, compared with the case where a flat plate-shaped perforated plate is adopted as the dust-proof net, the intake area of the dust-proof net becomes large, and the cooling outside air taken in from each intake port of the frame through the dust-proof net is increased. Since the wind speed can be kept low, the occurrence of clogging due to dust adhering to the dust-proof net can be effectively suppressed.

[Effect] Therefore, the required strength of the dust-proof wall is more sufficiently secured while adopting a resin-made frame for the dust-proof wall to reduce the weight and simplify the configuration of the dust-proof wall. In addition to this, overheating can be prevented while reducing the frequency of maintenance for the intake section.

According to a third aspect of the present invention, in the first or second aspect, the dispersion plate for dispersing a negative pressure generated by driving the cooling fan is provided with the porous plate. It was arranged in parallel with the inner surface side of the plate, and it was constituted so that separation of the perforated plate from the frame was prevented by assembling the dispersion plate to the frame.

According to the third aspect of the present invention, in addition to the perforated plate, the dispersion plate is assembled to the frame in a state of being juxtaposed on the inner surface side of the perforated plate, so that the strength as a dustproof wall is improved. It will be possible to achieve further.

Further, since the wind speed of the cooling outside air taken in from the intake port of the frame through the dustproof net can be suppressed substantially uniformly throughout the intake port, clogging due to dust adhering to the dustproof net can be prevented. Generation can be suppressed more effectively.

In addition, the perforated plate can be assembled to the frame only by fitting the perforated plate to the irregularities of the frame. The assembly for preventing the perforated plate from being detached from the frame is performed by the frame and the perforated plate. Since there is no need to perform such a process, the assembly structure can be simplified and the assembly can be facilitated.

[Effects] Therefore, while simplifying the assembly structure and facilitating the assembly, the strength as the dust-proof wall can be further improved, and the frequency of maintenance for the intake section can be reduced more effectively. Became.

[Structure] According to a fourth aspect of the present invention, in the first or the second aspect of the present invention, the resin material is supplied after the perforated plate is mounted on a mold for forming a frame. To form the frame.

According to the fourth aspect of the present invention, when the frame is formed, the perforated plate can be assembled to the frame so that it cannot be detached from the frame. In addition, since it is not necessary to provide irregularities for forming irregularities for fitting the perforated plate on the frame, it is possible to simplify the shape of the mold in the mold for forming the frame. It will be possible to reduce mold costs.

[Effect] Therefore, the manufacturing cost can be reduced while simplifying the assembly structure and facilitating the assembly.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an overall side view of a self-removing combine as an example of a working machine. This combine is located in front of a traveling machine body 2 equipped with a pair of left and right crawler traveling devices 1. A cutting and conveying unit 3 that cuts and transports the planted grain culm to the rear is connected to the unit so as to be able to move up and down, and the traveling machine body 2 performs threshing and sorting of the harvested grain and culm from the cutting and conveying unit 3. And a screw tank for discharging the grains stored in the grain tank 5 to the outside of the machine. The traveling machine 2 is equipped with a mechanism 6 and a boarding operation unit 7 is formed at a position on the right side of the reaping and transporting unit 3.

As shown in FIGS. 1-4, the boarding operation unit 7
A front panel 10 having a meter panel 8, a control lever 9, and the like is erected at the front end of the boarding operation portion forming portion of the traveling body 2, and a main speed change lever 11 and a sub-transmission are provided at the left side of the boarding operation portion forming portion. A side panel 13 having a lever 12 and the like is erected, and a driver seat 16 is provided above an engine cover 15 that covers an engine 14 and the like mounted at a rear part of the boarding driving section forming portion. The boarding step 17 is laid on a floor portion surrounded by the panel 10, the side panel 13, and the engine cover 15. The front panel 10 and the boarding step 17 are made of blow-molded resin, so that the weight of the machine body and the structure of the machine are simplified as compared with the case of using sheet metal.

As shown in FIGS. 1 to 5, a cooling fan 18 is provided on the right side of the engine 14, and a radiator 19 is provided upright on the right side of the cooling fan 18 in the traveling body 2. The engine cover 15 is provided at a position on the right outside of the radiator 19 in the traveling body 2 with a longitudinal axis P
A front wall 21 erected in front of the body of the engine 14 and an engine 1 are mounted on a side wall 20 erected so as to be able to swing up and down.
4 is connected to a rear wall 22 erected at the rear part of the fuselage, and a ceiling wall 23 equipped with a driver seat 16 is erected between the front wall 21 and the rear wall 22. An intake box 24 is provided at a position behind the seat 16, and its posture is changed between a normal posture covering the engine 14, the radiator 19, and the like by swinging around a longitudinal axis P, and an engine 14 and a radiator. A maintenance position such as 19 can be switched to a maintenance position in which the periphery is opened, and a fixed position can be fixedly held by a lock mechanism (not shown).

The side wall 20 is made of a resin frame 26 blow-formed to have an air inlet 25 and a dust screen 27 for preventing dust from being sucked from the air inlet 25. 28 are employed. On the front wall 21, a sheet metal frame 30 formed so as to have a single air inlet 29.
And a dust-proof net 31 for preventing dust from being sucked from the air inlet 29.
A dust-proof wall 32 is provided. The rear wall 22 and the ceiling wall 23 are made of sheet metal. The intake box 24 has three intake ports at its front and upper parts.
3, a sheet metal frame 34 is provided with a dustproof net 35 for preventing dust from being sucked from the intake port 33.

As shown in FIG. 1 to FIG.
Reference numeral 6 denotes a handrail 36 located on the right outer side of the driver's seat 16 and facilitates getting on and off the boarding driver 7, and an intake port 25.
Is divided into a first intake port 25A, which is an intake area facing the intake box 24, and an intake area facing the radiator 19, and the intake area facing the radiator 19 is a front upper intake area. And a third intake port 25B, which is a lower intake port in the rear lower portion, and a diagonally oriented partition 38 is provided. The handrail 36 is attached to the frame 26 of the side wall 20 by the upper edge 3.
9 and the front edge portion 40 are integrally formed in a double-supported shape. The horizontal partition 37 is attached to the frame 26 of the side wall 20.
Are integrally formed so as to extend over the front edge 40 and the rear edge 41. The oblique partition 38
The frame 26 of the side wall 20 is integrally formed so as to extend over the rear edge 41 and the lower edge 42.

That is, while the frame 26 of the side wall 20 is made of blow-molded resin, which is advantageous in reducing the weight of the body and simplifying the configuration, the frame 2
6, a double-sided handrail 36 and an intake port 25 of the frame body 26.
Is integrally formed with the two partitions 37 and 38 for dividing the frame into three intake ports 25A to 25C, so that the rigidity of the frame body 26 itself can be increased, and the handrail 36 and the partitions 37 and 38 are provided on the side wall 20. This saves time and effort for mounting.

From the above configuration, the cooling fan 18
Is driven, cooling outside air is taken in from each intake port 25, 29, 33 through each dustproof net 27, 31, 35,
Cooling outside air taken in from the intake port 29 of the front wall 21
After passing through the communication port 43 formed at the joint portion of the front wall 21 with the side wall 20, the cooling outside air taken in from each of the suction ports 33 of the suction box 24 is taken in from the first suction port 25A of the side wall 20. Together with the cooled outside air
After passing through the gap 44 formed between the side wall 20 and the ceiling wall 23, the air flows into the cooling air taken in from the second air inlet 25 </ b> B and the third air inlet 25 </ b> C of the side wall 20. The radiator 19 and the engine 14 flow toward the partitioned engine room 45.
And so on.

As shown in FIGS. 3 to 5 and FIGS. 7 to 11, a porous plate 46 made of a flat metal mesh is used for each of the dustproof nets 31 and 35 of the front wall 21 and the intake box 24. On the other hand, a perforated plate 47 made of a punching metal which is formed in a wavy shape and has a plurality of unevennesses 47A and 47B arranged in the lateral direction is adopted as the dustproof net 27 of the side wall 20 and has a size covering the entire area of the intake port 25. The perforated plate 47 is provided on the inner surface around the intake ports 25A to 25C in the frame 26 of the side wall 20.
And a plurality of concaves and convexes 26A and 26B to be fitted with are formed.

With this configuration, the dustproof net 2 can be compared with a case where a perforated plate formed in a flat plate shape is adopted as the dustproof net 27.
7, the strength of the dustproof net 27 is increased, and the dustproof net 27 is fitted to each of the irregularities 26A and 26B of the frame 26, so that the frame 26 and the dustproof net 27 are connected to the respective intake ports 25A to 25C of the frame 26. The frame 26 can be integrated with a single dustproof net 27 having a high strength, and can be integrated with a large joint area that supports the dustproof net 27 at the inner peripheral portions of the air inlets 25A to 25C. The required strength of the dust-proof wall 28 can be ensured while adopting a resin material which is lightweight and advantageous in terms of moldability.

Further, the intake area becomes larger than when a perforated plate formed in a flat plate shape is adopted as the dustproof net 27, and the dustproof
The wind speed of the cooling outside air taken in through the airbag can be suppressed low, and the occurrence of clogging due to the dust adhering to the dustproof net 27 can be suppressed. Therefore, the dust is removed from the dustproof net 27 of the side wall 20. Overheating can be avoided while reducing the frequency of maintenance.

As shown in FIG. 3, FIG. 5, FIG. 10, and FIG. 11, on the inner surface side of the dustproof net 27 on the side wall 20, a punching metal for dispersing a negative pressure generated by driving the cooling fan 18 is formed. Dispersion plates 48 are juxtaposed, so that the wind speed of the cooling outside air taken in from the air inlet 25 of the side wall 20 through the dustproof net 27 can be more uniformly reduced over the entire area of the air inlet 25. The occurrence of clogging due to dust adhering to the net 27 can be more effectively suppressed.

The dispersing plate 48 is attached to the frame 26 together with the dustproof net 27 by a plurality of tapping screws 49 in such a state that the dustproof net 27 is prevented from detaching from the frame 26 as the side wall 20 is assembled to the frame 26. The dustproof net 2 for the frame 26 is thereby fixed.
As the assembly of No. 7, the unevenness 26A, 26B of the frame 26
It is only necessary to fit the dust-proof net 27 to the frame 26, and it is not necessary to perform the assembly for preventing the dust-proof net 27 from being detached from the frame 26 between the frame 26 and the dust-proof net 27. This makes it easier to assemble and assemble.

Further, in addition to the dust-proof net 27, the dispersion plate 48 is also assembled to the frame 26 in a state of being juxtaposed on the inner surface side of the dust-proof net 27, so that the strength of the dust-proof wall 28 can be further improved. ing.

Reference numerals 50 shown in FIGS.
Are embedded nuts provided on the frame body 26 to enable the connection of
Are mounting holes formed in the frame body 26 to enable the dustproof net 27 and the dispersion plate 48 to be fixed to the frame body 26 by tapping screws 49. Reference numeral 52 shown in FIGS. Tapping screw 4 formed on net 27
Reference numeral 53 shown in FIG. 11 denotes a tapping screw 4 formed on each leg 48A of the dispersion plate 48.
9 is a through hole for insertion.

Further, reference numeral 54 shown in FIGS.
Is an internal wall interposed between the side wall 20, the front wall 21, the rear wall 22, the ceiling wall 23, and the intake box 24.

[Other Embodiments] Hereinafter, other embodiments of the present invention will be listed. (1) The work machine may be an all-culm-in combine or a mowing machine as long as it is equipped with a dustproof wall 28, or may be an air-cooled machine without the radiator 19. . (2) The perforated plate 47 used for the dust-proof net 27 of the side wall 20 may be made of a wire mesh or expanded metal bent in a wavy shape in which a plurality of irregularities 47A and 47B are arranged in the horizontal direction. , May be divided into a size corresponding to the size of each of the intake ports 25A to 25C. (3) The frame 26 of the side wall 20 may be formed by injection molding, or may be formed with a single intake port 25. (4) A dustproof net 27 is provided in a mold for forming the frame 26 of the side wall 20.
After the resin is installed, the resin material is supplied so that the frame 2
When forming 6, the frame 26 and the dustproof net 27 may be integrated so as not to be detached. (5) Similar to the side wall 20, the front wall 21, the rear wall 22, and the like are also provided with a resin frame 26 formed to have the air inlet 25, so that dust is prevented from being sucked from the air inlet 25. A dustproof wall 28 provided with a net 27 may be employed. (6) The dispersion plate 48 may be made of resin.

[Brief description of the drawings]

FIG. 1 is an overall side view of a self-contained combine.

FIG. 2 is a plan view of a boarding operation unit.

FIG. 3 is a longitudinal sectional front view of a main part showing an intake structure.

FIG. 4 is a perspective view of an engine cover.

FIG. 5 is a cross-sectional plan view of a main part showing an intake structure.

FIG. 6 is a front view of the frame showing the surface shape of the frame forming the side wall;

FIG. 7 is a rear view of the frame body showing the shape of the rear surface of the frame body forming the side wall;

FIG. 8 is a perspective view of the frame body showing the back surface shape of the frame body forming the side wall;

FIG. 9 is a front view of the dust net showing the shape of the dust net constituting the side wall;

FIG. 10 is a cross-sectional plan view of a main part showing a configuration of a side wall.

FIG. 11 is an exploded cross-sectional plan view of a lower portion of the side wall showing a configuration of the side wall.

[Explanation of symbols]

 Reference Signs List 18 cooling fan 25 intake port 25A intake port 25B intake port 25C intake port 26 frame 26A concave 26B convex 27 dust-proof net 28 dust-proof wall 47 perforated plate 47A concave 47B convex 48 dispersion plate

Continued on the front page F term (reference)

Claims (4)

[Claims] 1. A dust-proof wall is provided by providing a resin frame having an air inlet through which cooling air is taken in as a cooling fan is driven, and a dust-proof net for preventing dust from being sucked from the air inlet. In the suction unit structure of the working machine, a perforated plate formed by bending in a wavy shape in which irregularities are arranged in a lateral direction is adopted as the dust-proof net, and the perforated plate is formed in an inner peripheral portion of the frame body around the suction port. The suction unit structure of the working machine with unevenness that fits the board. 2. A dustproof wall comprising a resin frame having an air inlet through which cooling air is taken in by driving a cooling fan, and a dustproof net for preventing dust from being sucked from the air inlet. In the suction unit structure of the working machine, a plurality of suction ports are formed in the frame body, and the dustproof net is bent and formed in a wavy shape in which unevenness is arranged in a lateral direction across all the suction ports. A suction unit structure of a working machine, wherein a perforated plate is employed, and irregularities are formed on an inner surface around each of the suction ports in the frame body so as to be fitted with the perforated plate. 3. A dispersing plate for dispersing a negative pressure generated by driving the cooling fan is arranged side by side on the inner surface side of the perforated plate.
3. The air intake section structure for a working machine according to claim 1, wherein the dispersing plate is attached to the frame so as to prevent the perforated plate from being detached from the frame. 4. The air intake section structure of a working machine according to claim 1, wherein the frame is formed by supplying a resin material after mounting the perforated plate on a mold for forming a frame.