JP2013072397A - Installation part structure of precleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation part structure of a precleaner capable of preventing the introduction of rainwater into the precleaner 10 and the resuction of garbage and minimizing an installation height.SOLUTION: The precleaner 10 includes a substantially cylindrical body 11 for blocking the upper end, and an inner cylinder 12 for inserting an upper end opening into a space in the body, and an intake air introducing port 14 is formed between the body lower edge 11a and an outer wall of the inner cylinder 11. The precleaner is an object for an installation part. A precleaner installing port 21 of a shape corresponding to the body lower edge 11a of the precleaner 10 is formed on an upper surface of a hood 20 of a working machine 1, the lower edge 11a of the body 11 of the precleaner 10 is inserted and fixed into the precleaner installing port, a clearance between the installation port 21 and the body 11 is sealed by a seal 22, and a lower end opening 12b of the inner cylinder 12 communicates with an air filter (unillustrated) arranged in an intake port (unillustrated) of an intake apparatus in the hood 20.

Description

  The present invention provides air introduced into an air filter provided on the primary side of an air filter provided in an intake port of an apparatus (hereinafter referred to as “intake apparatus”) that performs intake air during operation, such as an engine or a main body of a compressor. Regarding the structure of the precleaner mounting part, which is a device that removes dust, etc., in relation to the structure of the mounting part where the precleaner is attached to the working machine such as a vehicle, compressor, generator, etc. equipped with the above-mentioned intake equipment .

  In a working machine equipped with the above-described intake device that takes in intake air when operating, such as a compressor body or an engine, in order to prevent dust from entering the compression chamber or the combustion chamber of the intake device, An air filter is provided at the mouth.

  However, if the working environment described above is a construction site, a mining site such as a mine, or any other environment where there is a lot of dust or other dust, remove the dust in the air using only the air filter described above and purify the intake air. Then, the air filter is clogged immediately, and the filter element needs to be replaced frequently, so that maintenance is complicated and expensive.

  Therefore, in order to reduce the number of replacement of filter elements even when used in such a dusty environment, a pre-cleaner is provided on the primary side of the air filter, and the air after dust is removed by this pre-cleaner. Is sent to the air filter.

  As an example of such a pre-cleaner 10, as shown in FIGS. 1 and 2, a substantially cylindrical body 11 having an open lower end and a closed upper end, and an upper end opening 12 a in a space in the body 11. Between the inner wall 12 of the inner cylinder 12 and the outer wall of the inner cylinder 12 and the inner wall of the body 11 that are inserted concentrically with a predetermined interval in the circumferential direction. A structure having a blade 13 that has an inclination and connects the body 11 and the inner cylinder 12 is known.

  In such a pre-cleaner 10, the lower end opening 12b of the inner cylinder 12 is communicated with the intake port of the intake device via the air filter, and the body is moved from the upper end opening 12a of the inner cylinder 12 by the operation of the intake device. When the air in the body 11 is sucked out, air is sucked in from the air inlet 14 formed between the lower edge 11a of the body 11 and the outer wall of the inner cylinder 12, and when this air flows into the body 11, The air flow is deflected along the inclined blades 13 shown in FIG. 2B, and a swirling flow is generated in the body 11. Since the dust flowing into the body 11 together with the air is heavy with respect to the air, the centrifugal force acts on the dust due to the swirling flow and is pushed out to the inner wall side of the body 11 so that the dust can be removed by so-called centrifugal separation. ing.

  In the example shown in FIGS. 1 and 2, by forming a slit 15 having a length in the height direction (axial direction) on the side wall of the body 11, the dust pushed out to the inner wall side in the body 11 by the swirling flow is After colliding with the inner wall of the body 11, it is discharged out of the body 11 through this slit 15. The air from which the dust has been removed is sucked out from the upper end opening 12a of the inner cylinder 12, and is sucked into the intake device through the air filter.

  In the example shown in FIGS. 1 and 2, a vane 17 that is swirled by a swirling flow generated in the body 11 is further provided. The vane 17 scrapes dust adhering to the inner wall surface of the body 11 and pushes it out from the slit 15 ( Non-patent document 1).

  In the precleaner 10 described with reference to FIGS. 1 and 2, the centrifugally separated dust can be discharged out of the body 11 through the slit 15 provided in the body 11. , A pocket-shaped chamber for collecting the separated dust is provided in the body 11 so that the dust can be collected in the chamber so that the collected dust can be retained in the body 11 without being discharged. There is also a precleaner configured (see Patent Document 1).

  In the precleaner 10 having the body 11 and the inner cylinder 12 configured as described above, the interval between the lower end edge 11a of the body 11 and the outer wall of the inner cylinder 12 serves as an intake inlet 14, and the intake inlet 14 Since air is sucked through 14, if the intake inlet 14 opens at a position close to the upper surface of the bonnet 20 that accommodates the components of the work machine 1, it accumulates on the hood 20 of the work machine 1. I will suck in the dust.

  Therefore, when attaching such a precleaner 10, as shown in FIG. 5A, a conduit 30 ′ communicating between the precleaner 10 and an air filter (not shown) is passed through the upper surface of the bonnet 20. In general, the intake port 14 of the precleaner 10 is disposed away from the upper surface of the bonnet 20 by protruding outward and attaching the precleaner 10 to the upper end of the conduit 30 ′.

  Even when the configuration in which the upper surface of the bonnet 20 and the precleaner 10 are arranged apart from each other as described above is employed, when the work machine 1 is used outdoors in the rain, the outer wall of the body 11 of the precleaner 10 is used. The water droplets that have flowed down and dropped from the lower end edge 11a of the body 11 may be sucked together with air from the intake inlet 14.

  When rainwater is introduced into the precleaner 10 in this way and the inner wall of the body 11 gets wet, dust adheres to the inner wall of the body 11 and it is difficult for the dust to be discharged from the slits. 11 If it adheres to the inner wall, scraping with the vane 17 becomes difficult, and malfunction such as stopping the rotation of the vane 17 may occur.

  As described with reference to FIGS. 1 and 2, when the body 11 is provided with the slit 15 so that the dust can be discharged out of the body 11, the dust is discharged out of the body 11 through the slit 15. While the dust falls on the upper surface of the bonnet 20, it is sucked into the body 11 together with the air, and as a result of increasing the amount of dust in the air, the amount of dust introduced into the air filter without being removed increases.

  In addition, in the above-mentioned Patent Document 1, in order to prevent the precleaner 10 from sucking rainwater, an intake passage that communicates the inner cylinder 12 of the precleaner 10 and the air cleaner corresponding to the above-described air filter [FIG. )) Is provided with a bypass hole communicating with the space in the bonnet 20 and an opening / closing mechanism for opening and closing the bypass hole, and the work machine is operated with the bypass hole open in rainy weather. As a result, a part of the air that has not passed through the precleaner 10 is introduced into the intake port of the engine, so that the flow rate of the air sucked through the intake inlet 14 of the precleaner 10 is reduced and rainwater is generated. It has also been proposed to make it difficult to enter the precleaner 10 (Patent Document 1).

Donaldson pre-cleaner "Top Spin" brochure (http://www.donaldson.com/en/engine/support/datalibrary/000207.pdf#search='precleaner topspin ')

Microfilm of Japanese Utility Model No. 63-92118 (Japanese Utility Model Application No. 2-14456)

  In the mounting structure of the conventional precleaner 10 described above, the lower end edge 11a of the body 11 of the precleaner 10 passes through the bonnet 20 so as to be separated from the upper surface of the bonnet 20 as shown in FIG. The structure in which the precleaner 10 is attached to the upper end of the projecting conduit 30 ′ is effective in preventing inhalation of dust accumulated on the bonnet 20, but as described above, the rainwater that has flowed down and dropped through the body 11 is dropped. In addition, suction of dust that has fallen through the slit 15 cannot be prevented.

  In addition, in the mounting portion structure of FIG. 5A, the conduit 30 ′ is protruded in order to place the precleaner 10 at a high place, so that the overall height of the work machine 1 is greatly increased by the mounting of the precleaner 10. In addition, it becomes an obstacle when the work machine 1 is transported and installed, and since all the load of the precleaner 10 is applied to the conduit 30 ', when the conduit 30' is shaken and vibration is generated, the conduit 30 'and the conduit 30' are connected. In addition, the air filter or the like that is damaged breaks down, and the occurrence of such vibration causes a trouble such as loosening of a fixing tool (for example, a bolt) that fixes the precleaner 10 and dropping of the precleaner 10.

  On the other hand, in the configuration introduced as the above-mentioned Patent Document 1, the flow rate of the air introduced into the precleaner 10 through the intake inlet 14 by operating the work machine 1 with the bypass hole opened. Therefore, since the flow velocity is reduced, rainwater suction and re-suction of dust discharged through the slit 15 are less likely to occur.

  However, in the configuration described in Patent Document 1, as long as intake is performed by opening the intake inlet 14 in a space where rainwater and dust discharged from the slit 15 are present, the intake of rainwater and the recycle of discharged dust are not performed. Aspiration cannot be completely prevented.

  Moreover, in the configuration described in Patent Document 1, since the flow velocity of the intake air is reduced, the flow velocity of the swirling flow generated in the body 11 is also reduced, and the centrifugal force acting on the dust and raindrops in the swirling flow is also reduced. Therefore, the dust removal performance itself of the precleaner 10 is deteriorated. As a result, inhaled dust and raindrops cannot be removed sufficiently, and the amount of dust and raindrops introduced into the air cleaner increases.

  Further, in the configuration described in Patent Document 1, although the bypass hole opens in the bonnet 20, it adopts a configuration in which the air that does not pass through the precleaner 10 is directly sucked and introduced into the intake device, and this is a lot of dust. If used in an environment, a large amount of dust may be sent to the air cleaner of the intake equipment.

  Moreover, even if the configuration described in Patent Document 1 is adopted, the structure in which the precleaner 10 is attached to the upper end of the conduit 30 ′ protruding from the bonnet 20 must be followed, and the overall height of the work machine 1 is still high. The problem of high prices will not be resolved.

  Accordingly, the present invention has been made to solve the above-described drawbacks of the prior art, and can reliably prevent the infiltration of rainwater into the precleaner 10 and the dust deposited on the bonnet 20 and the precleaner 10 can be used as a body. 11 is provided with the slit 15 described above, it is possible to reliably prevent the dust discharged through the slit 15 from being sucked again, and even when the precleaner 10 is attached, An object of the present invention is to provide a precleaner attachment structure that can keep the overall height of 1 as low as possible.

  Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This code is used to clarify the correspondence between the description of the scope of claims and the description of the mode for carrying out the invention. Needless to say, it is used in a limited manner for the interpretation of the technical scope of the present invention. It is not a thing.

In order to achieve the above object, the precleaner mounting structure of the present invention includes a substantially cylindrical body 11 having an open lower end and a closed upper end, and an upper end opening 12a in the space in the body 11. In the mounting structure of the precleaner 10, which includes the inserted inner cylinder 12, and an intake inlet 14 is formed between the lower end edge 11 a of the body 11 and the outer wall of the inner cylinder 11,
A pre-cleaner mounting port 21 having a shape corresponding to the outer shape of the lower end edge 11a of the body of the pre-cleaner 10 is formed on the upper surface of the bonnet 20 of the work machine 1 containing an intake device (not shown);
The body 11 lower end edge 11a and the insertion portion 11d of the precleaner 10 are inserted and fixed in the precleaner mounting port 21 from the outside of the machine toward the inside of the machine, and the precleaner mounting port 21 and the body are fixed. 11 is provided with a seal 22 that seals the gap between the 11 insertion portions 11d,
Furthermore, in the bonnet 20, the lower end opening 12b of the inner cylinder 12 is communicated with an air filter (not shown) provided at an intake port (not shown) of the intake device (claim). Item 1).

  In the precleaner mounting portion structure having the above-described configuration, the space further includes a wall surface 23a that partitions the space inside the bonnet 20 and faces the intake port 14 of the precleaner at the position where the precleaner mounting port 21 is formed. A duct 23 for introducing air in the bonnet 20 may be provided (claim 2).

  Furthermore, when the duct 23 described above is provided, the duct 23 may have a soundproof structure (claim 3).

  In addition, the precleaner 10 to be attached is provided with a dust discharge slit 15 at any position on the side wall of the body 11 with the height direction as the length direction and communicating with the inside and outside of the body 11. In some cases, the body 11 exposed to the outside of the bonnet 20 may be covered with a substantially cylindrical cover 18 having an open lower end and a closed upper end (Claim 4). It is preferable that the cover 18 be transparent.

  With the configuration of the precleaner according to the present invention described above, the precleaner mounting portion structure of the present invention can surely prevent rainwater from being sucked into the precleaner 10 and sucks dust accumulated on the bonnet 20. If the precleaner 10 is provided with a dust discharge slit 15 in the body 11, the work associated with the mounting of the precleaner 10 while reliably preventing re-suction of the dust discharged through the slit 15. The increase in the height of the machine 1 could be minimized.

  In addition, since the lower end edge 11 a and the insertion portion 11 d of the precleaner 10 are inserted and fixed in the precleaner attachment port 21 formed in the bonnet 20, the weight of the precleaner 10 is supported by the bonnet 20. The load of the precleaner 10 can be prevented from being applied to the conduit 30 and the air filter, and troubles such as breakage of the conduit 30 and the air filter and dropping of the precleaner 10 can be prevented.

  Further, since the intake inlet 14 of the precleaner 10 is opened in the bonnet 20, the intake sound of the precleaner 10 is difficult to leak outside the machine, and the generation of noise due to the mounting of the precleaner 10 can be reduced. .

  A duct 23 that partitions the space in the bonnet 20 corresponding to the position where the precleaner mounting port 21 is formed, has a wall surface 23a facing the intake inlet 14 of the precleaner 10, and introduces air outside the hood 20 into the hood 20. In the configuration provided, the noise in the bonnet 20 does not directly reach the intake air inlet 14 due to the wall surface 23a of the duct 23 facing the intake air inlet 14, thereby leaking the noise from the precleaner 10 to the outside of the machine. I was able to prevent that.

  Further, when the sound absorbing material is attached to the partition plate constituting the duct 23 to make the duct 23 a soundproof structure, the noise that has entered the duct 23 is attenuated, and the noise in the hood 20 is reduced to the precleaner. As a result, it was possible to make it more difficult to leak out of the machine 10 and to make the working machine 1 with a quieter operation sound.

  Further, when the precleaner 10 is provided with a dust discharge slit 15 having a length in the height direction on the outer periphery of the body 11, a cover 18 that covers the body 11 exposed outside the bonnet 20 is provided. Thus, when the precleaner 10 is provided with the above-described vane 17 through the slit 15 or when the precleaner 10 includes the vane 17, leakage of operating noise of the vane 17 can be prevented and the discharged dust can be collected. By doing so, it was possible to prevent the dust from flying again.

  In particular, when the cover 18 described above is transparent, the amount of dust accumulated in the cover 18 can be confirmed by visual observation, and the disposal timing of the collected dust can be suitably grasped.

The principal part cross-sectional perspective view of a pre-cleaner. (A) of a pre-cleaner is a cross-sectional front view, (B) is a cross-sectional enlarged view taken along line BB of (A). It is explanatory drawing of the attachment part structure of a pre cleaner, (A) is the state before attachment, (B) is the state after attachment. Explanatory drawing which shows the modification of the attaching part structure of a pre cleaner. It is a front external view of a working machine with a pre-cleaner attached, (A) is a conventional attachment structure, and (B) is an attachment example according to the attachment structure of the present invention.

  The precleaner mounting structure of the present invention will be described below with reference to the accompanying drawings.

  As described above, the precleaner 10 to be attached in the present invention includes a substantially cylindrical body 11 having an open lower end and a closed upper end, and an upper end opening 12a in the space in the body 11. An inner cylinder 12 inserted concentrically with respect to the inner wall surface of the body 11, an intake inlet 14 is formed between the inner wall of the lower end edge 11 a of the body 11 and the outer wall of the inner cylinder 12, and the inner cylinder 12 The lower end opening 12b of the inner cylinder 12 is connected to an air filter (not shown) as an intake device, and the air in the body 11 is sucked from the upper end opening 12a of the inner cylinder 12, so Various types of air can be used as long as air is introduced into the air.

  As an example, in the following description, as described with reference to FIGS. 1 and 2, an elongated slit 15 that communicates the inside and outside of the body 11 and has the height direction of the body 11 in the length direction is provided on the side wall of the body 11. The structure of the mounting portion will be described by taking as an example a precleaner 10 configured so that dust can be discharged out of the body 11 through the slit 15, but the precleaner 10 to which the present invention is applied is described above. If the body 11 and the inner cylinder 12 having the structure are provided and the intake inlet 14 is formed between the inner wall of the lower end edge 11a of the body 11 and the outer wall of the inner cylinder 12, it is described in Patent Document 1. As described above, it is possible to target the dust that has been centrifuged in the body 11, and the dust can be discharged out of the body 11 by a structure other than the above, or the body 11 For known precleaner having a structure that can also be of interest.

  Preferably, the body 11 of the precleaner 10 is provided with a flange 11b as shown in FIGS. 1 and 2 over the entire outer periphery at a position slightly above the lower end edge 11a, or in FIG. 2 (A). As shown as a modified example, the lower end edge 11a of the body 11 and the insertion portion 11d are formed to have a small diameter with respect to other portions of the body 11 to form a stepped portion 11c. A position below the stepped portion 11c can be an insertion portion 11d that is inserted into a precleaner attachment port 21 formed in the bonnet 20 described later.

  With this configuration, when the insertion portion 11 d is inserted into the precleaner attachment port 21 from outside the bonnet 20, the flange 11 b or the step portion 11 c is placed on the opening edge of the precleaner attachment port 21 formed in the bonnet 20. can do.

  In addition, although illustration is abbreviate | omitted, the body 11 may be made to be able to divide this into the upper and lower parts at the upper position of the flange 11b mentioned above or the step part 11c as an example, and it is comprised by doing in this way. Even if the air filter and the lower end opening 12b of the inner cylinder 12 of the pre-cleaner 10 are connected, it is possible to easily perform maintenance and the like inside the body 11 by removing the upper half portion of the body 11. become.

  The precleaner insertion portion 11d configured as described above is inserted into a precleaner attachment port 21 provided on the upper surface of the bonnet 20 of the work machine 1, as shown in FIGS.

  The precleaner attachment port 21 is formed in substantially the same shape as the outer shape of the insertion portion 11d described above, and when the insertion portion 11d of the precleaner 10 is inserted, the flange 11b or the step portion 11c of the precleaner 10 It can be placed on the opening edge of the pre-cleaner mounting port 21.

  Prior to insertion of the insertion portion 11d of the precleaner 10, it is preferable that a seal 22 for sealing a gap generated between the precleaner attachment port 21 and the insertion portion 11d is attached to the precleaner attachment port 21. .

  In the present embodiment, as an example, an O-ring having a U-shaped groove-shaped cross-section opening outward is used as the seal 22 as shown in an enlarged view in FIG. The O-ring is mounted so that the opening edge of the pre-cleaner mounting port 21 is inserted into the U-shaped groove of the O-ring, and in this state, the insertion portion 11d of the pre-cleaner 10 is inserted into the O-ring. The gap between the opening edge of the attachment port 21 and the insertion portion 11d of the precleaner 10 can be sealed, but the gap between the precleaner attachment port 21 and the insertion portion 11d of the precleaner 10 is sealed. However, the present invention is not limited to this method, and any method may be used for sealing.

  As described above, the precleaner 10 attached to the upper surface of the bonnet 20 of the work machine 1 connects the lower end opening 12b of the inner cylinder 12 of the precleaner 10 and the air filter through the conduit 30 in the bonnet 20. It communicates with an intake port of an intake device such as an engine or a compressor (not shown).

  In the illustrated example, the precleaner 10 is placed on the opening edge of the precleaner attachment port 21 formed in the bonnet 20 by the flange 11b or the step portion 11c, and the weight thereof is supported on the bonnet 20 side. As described with reference to FIG. 5 (A), compared with the case where the weight of the precleaner 10 is supported by the conduit 30 ′ penetrating the bonnet 20, the conduit 30 ′ and the like are damaged, the precleaner is dropped, etc. Trouble is unlikely to occur.

  The space in the bonnet 20 to which the precleaner 10 is attached in this way is partitioned as shown in FIG. 4 as an example, so that a duct 23 can be formed in the bonnet 20. A soundproofing effect is provided by attaching a soundproofing material to the partition wall defining the duct 23.

  Further, the body 11 portion of the precleaner 10 exposed to the outside of the bonnet 20 is covered with a cap-shaped cover 18 as shown in FIG. 4, so that noise leaks outside the machine through the slit 15 provided in the body 11. In addition, it may be possible to prevent the collected dust from being scattered again.

  The cover 18 is preferably made of a transparent material, and the inside of the cover 18 can be confirmed by visual observation, so that the amount of dust collected in the cover 18 can be confirmed.

  As described above, when the pre-cleaner 10 is attached to the bonnet 20 of the work machine 1 and the intake device such as the engine or the compressor provided in the work machine 1 is started, the intake device is connected to the compression chamber via the intake port. Inhalation of the air into the combustion chamber is started, and as a result, the air in the body 11 is sucked from the upper end opening portion 12a of the inner cylinder 12 of the precleaner 10 communicating with the intake port.

  As a result, outside air is introduced into the body 11 of the precleaner 10 via the intake inlet 14, and the intake inlet 14 opens in the space inside the hood 20 and is attached to the precleaner. Since the gap between the mouth 21 and the insertion portion 11d is sealed 22, the air in the bonnet 20 is sucked.

  The bonnet 20 of the work machine 1 is provided with an outside air inlet (not shown) for introducing outside air. The outside air sucked into the bonnet 20 cools an intake device, a cooling device, etc. It is sucked into the body of the pre-cleaner from the intake port of the pre-cleaner. Since the bonnet 20 is difficult for dust and rainwater to enter, the rainwater is not introduced into the body 11 through the intake inlet 14, and the dust accumulated on the hood 20 and the slits 15 of the body 11 are not formed. It is possible to reliably prevent the dust discharged via the intake port 14 from being introduced into the body 11 and to reduce the intake noise leaking from the precleaner 10.

  Moreover, by adopting such a mounting structure of the precleaner 10, the installation height of the precleaner 10 can be lowered [see FIG. 5B], and as an example, as shown in FIG. In the example in which the precleaner 10 is attached to the bonnet having a height of 1635 mm, the height of the conduit 30 ′ and the height of the precleaner 10 is increased by 435 mm. , The total height of work implement 1 was 2070m.

  However, by adopting the mounting portion structure of the present invention, even when the precleaner 10 of the same size is mounted on the bonnet 10 of the same size as shown in FIG. It was possible to keep it down to 160mm.

  As shown in FIG. 4, a space in the bonnet 20 corresponding to the mounting position of the precleaner 10 is partitioned, and a wall surface 23 a that faces the intake inlet 14 of the precleaner 10 is provided, and communicates with the intake inlet. When the duct 23 is formed and the air in the bonnet 20 is introduced through the duct 23, the suction through the intake inlet 14 is performed in the duct 23. However, the noise that is attenuated in the duct 23 and leaks out of the machine from the precleaner 10 can be reduced.

  In particular, by adhering a sound absorbing material to the inside of the duct 23 to provide a soundproof structure, it was possible to more reliably prevent noise in the bonnet 20 from leaking outside the machine.

  Further, in the configuration provided with the cover 18 described above, it is possible to prevent the intake sound for the precleaner 10, the operation sound of the vane 17, and the noise in the bonnet 20 from leaking through the slit 15.

  As described above, the structure of the precleaner mounting portion of the present invention has a relatively simple structure, and prevents inhalation of rainwater, inhalation of dust accumulated on the hood, and reinhalation of dust discharged through the slit 15. It was possible to satisfy all the requirements of keeping the overall height of the work machine 1 to which the precleaner 10 was attached low while preventing it.

  The above-described precleaner mounting structure of the present invention is widely applicable to work machines equipped with air intake equipment, and particularly, work machines used in dusty environments such as construction sites and mining facilities. It is suitable for application to a working machine such as a working machine used in a vehicle, a working vehicle having many opportunities to travel on an unpaved road or the like.

  As an example, when an intake device provided in a work machine such as an automobile, a tractor, other vehicles, an engine-driven generator or a compressor is an engine, the air intake portion for the intake port of the engine has A precleaner can be attached by adopting an attachment structure.

  In addition, when the intake device is a compressor main body such as a compressor, it can be adopted as an air intake portion for the intake port of the compressor main body, and further, like an engine-driven compressor. When a plurality of intake devices such as an engine and a compressor body are installed as intake devices on a work machine, each of the air intake portion for the engine intake port and the air intake portion for the compressor body intake port It is also possible to employ the precleaner attachment structure of the present invention.

DESCRIPTION OF SYMBOLS 1 Work implement 10 Precleaner 11 Body 11a Lower end edge 11b Flange 11c Step part 11d Insertion part 12 Inner cylinder 12a Upper end opening part 12b Lower end opening part 13 Blade | blade 14 Intake inlet 15 Slit 17 Vane 18 Cover 18a Dust collection part 20 Bonnet 21 Precleaner mounting port 22 Seal (O-ring)
23 Duct 23a Wall 30, 30 'Conduit

Claims (5)

A substantially cylindrical body having a lower end opened and a closed upper end, and an inner cylinder having an upper end opening inserted into a space in the body, and intake air is introduced between the lower end edge of the body and the outer wall of the inner cylinder In the mounting structure of the precleaner with the mouth formed,
A pre-cleaner mounting port having a shape corresponding to the outer shape of the lower edge of the body of the pre-cleaner is formed on the upper surface of the bonnet of the work machine containing the intake equipment.
The body bottom edge and the insertion portion of the precleaner are inserted and fixed from the outside of the machine toward the inside of the machine in the precleaner attachment port, and a gap between the precleaner attachment port and the insertion portion of the body is formed. Provide a seal to seal,
Further, a precleaner mounting portion structure characterized in that, in the bonnet, the lower end opening of the inner cylinder communicates with an air filter provided at an intake port of the intake device.   2. A space for partitioning a space in the bonnet at a position where the precleaner mounting port is formed, having a wall surface facing the intake inlet of the precleaner, and providing a duct for introducing air in the bonnet. Item 6. A precleaner mounting structure according to Item 1.   The precleaner mounting portion structure according to claim 2, wherein the duct has a soundproof structure. At any position on the side wall of the body of the pre-cleaner, a slit for discharging dust that connects the inside and outside of the body is provided with the height direction as the length direction,
The precleaner installation according to any one of claims 1 to 3, wherein the body exposed to the outside of the bonnet is covered with a substantially cylindrical cover having an open lower end and a closed upper end. Part structure.   5. The precleaner attachment structure according to claim 4, wherein the cover is transparent.

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