JP2010248782A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine which can effectively reduce clogging in a filter and can reduce the frequency of the maintenance and replacement of a filter. <P>SOLUTION: A fan 22 driven by an engine 6 is arranged at the downstream side of an intake duct 23 in a machine room 5, and the filter 30 is arranged at the upstream side of the intake duct 23. The filter 30 has an inflow surface 30a which faces the upstream side of the intake duct 23, spread in the nearly vertical direction, and supported by the intake duct 23 by a vibration absorbing frame body 31 in an oscillating manner. The filter 30 and the engine 6 are connected to each other by a vibration transmission object, and a cleaning member 40 having a family of brushes 42 is provided at the inflow surface 30a side of the filter 30. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a working machine such as a hydraulic excavator, and more particularly to a mechanism for preventing clogging of a filter provided in an intake duct.

  As this type of intake duct, for example, an intake duct having a double duct structure in which an internal duct is further provided in the intake chamber is known (Patent Document 1). In this intake duct, a first intake port that takes in outside air into the upper portion of the intake chamber is provided so as to open in the vertical direction, and a second intake port that takes in air in the intake chamber opens in a lateral direction in the side portion of the internal duct. It is provided as follows. A filter is attached to the second air inlet.

  In this way, the intake duct is made into a double structure, and the flow path for taking in outside air is refracted in a substantially L shape, so that the noise generated in the duct can be leaked directly to the outside while ensuring a sufficient intake amount. Can be reduced.

  As this type of clogging prevention mechanism, for example, a dustproof device has been proposed in which a metal mesh is provided on the front surface of a filter and dust adhesion can be reduced by mechanically shaking the metal mesh (Patent Document 2). . Specifically, the wire mesh is repeatedly swung by a hydraulic cylinder or repeatedly moved up and down by a motor while the engine is stopped.

JP 2006-206034 A JP 2004-225624 A

  Since work machines are often used in applications where a large amount of dust is generated, such as construction work and recycling work, the dust-proof filter provided in the intake duct is more likely to be clogged than an automobile or the like. If the clogging of the filter exceeds the limit and becomes blocked, heat cannot be exchanged with the radiator, and the engine may overheat and break down. Therefore, the operator needs to perform maintenance frequently and check the state of the filter. Also, even if there is some allowance before the closed state, the filter is often replaced proactively in consideration of safety, so the filter replacement frequency tends to increase.

  In this regard, the dustproof device of Patent Document 2 can be used to shake off dust adhering to the filter surface and wire mesh while the engine is stopped on behalf of the operator, so that the frequency of maintenance and filter replacement can be expected to decrease. .

  However, since it does not operate while the engine is in operation, if a large amount of dust is sucked in at a time during operation, the wire mesh and the filter may be clogged and clogged. Further, since fine dust passes through the wire mesh and enters the filter, there is a disadvantage that clogging caused by dust accumulation in the filter cannot be prevented.

  The present invention has been made in view of such points, and an object thereof is to provide a working machine that can effectively reduce clogging of a filter and reduce the frequency of maintenance and filter replacement. It is in.

  In order to achieve the above object, the present invention uses the vibration of the engine to shake the filter.

  That is, the present invention is arranged on the downstream side of the engine, the intake duct, and the intake duct, is driven by the engine, and is disposed on the upstream side of the intake duct so as to block the passage of the intake duct. A filter attached to the inside of the machine chamber, the filter having an inflow surface extending in a substantially vertical direction facing the upstream side of the intake duct, and capable of vibrating in the intake duct via a vibration absorbing frame body A work machine that is supported and in which the filter and the engine are coupled via a vibration transmission body.

  According to such a working machine, the filter supported so as to be able to vibrate is connected to the engine via the vibration transmitting body. Therefore, when the engine vibrates, the vibration is transmitted to the filter and the filter swings. Therefore, since vibration is always applied to the filter while the engine is running, adhesion of dust to the filter is reduced, and clogging of the filter can be effectively prevented. Once the engine is running, it works in tandem with it, saving time.

  In particular, a cleaning member having a group of brushes is further provided on the inflow surface side of the filter, and the cleaning member is fixed in the machine chamber so that a tip portion of the group of brushes contacts the inflow surface. It is good to do so.

  By doing so, the dust attached to the filter surface can be swept off with the brush, and the dust that has entered the filter can be put out, so that the filter can be further prevented from being clogged.

  Specifically, the cleaning member has a plurality of support bars arranged in a lattice pattern along the inflow surface, and the group of brushes are supported on each of the plurality of support bars. can do.

  Then, it is not necessary to greatly obstruct the air flow by the cleaning member.

  More specifically, an intake chamber partitioned by a partition wall is formed in the machine chamber, the intake duct is provided in the intake chamber so that the inflow surface faces, and an upper portion of the intake chamber An air intake opening for taking in outside air is opened, and a box-shaped dust receiving portion having a dust receiving opening on the upper surface is provided at the lower portion of the intake chamber, and the bottom wall of the dust receiving portion can be opened and closed. Can be kept.

  In this case, since the intake port is opened at the upper part of the intake chamber, dust falls into the intake chamber. By providing the dust receiving portion at the lower portion of the intake chamber, the dust that has entered the intake chamber can be accommodated in the dust receiving portion. Since the bottom wall of the dust receiving portion can be opened and closed, the stored dust can be discarded outside the machine room.

  Further, the inside of the dust receiving part is partitioned into a first receiving part and a second receiving part, the first receiving part is located below the inflow surface, and the dust receiving part has the An upper lid that can be switched between a first closed position that covers only the first receiving portion side and a second closed position that covers only the second receiving portion side among the dust receiving ports may be attached. .

  Thus, for example, if the upper lid is set at the first closed position when the engine is stopped, the dust entering the intake chamber during that time can be accommodated in the second receiving portion. If the upper lid is set at the second closed position during the operation of the engine, the dust stored in the second receiving portion is prevented from rising and adhering to the filter, and the dust entering the intake chamber during the operation is reduced to the first. It can be accommodated in the receiving part.

  Various configurations of the vibration transmitting body are conceivable. For example, a support arm portion extending from the engine toward the filter may be provided, and a proximal end side of the support arm portion may be fixed to the engine, and a distal end side may be fixed to the filter.

  By doing so, the vibration of the engine can be directly transmitted to the filter with a relatively simple configuration, so that it is difficult to break down and the filter can be vibrated effectively.

  The vibration transmitting body includes a support arm portion extending from the engine toward the filter, and a proximal end side of the support arm portion is rotatably supported by the engine via a second link pin. The distal end side of the support arm portion is rotatably supported by the filter via a first link pin substantially parallel to the second link pin, and an intermediate portion of the support arm portion is located in the machine chamber. It can also be made to be rotatably supported by the provided support part via a starting point pin substantially parallel to the first link pin and the second link pin.

  In this case, the vibration of the engine can be transmitted to the filter after being amplified or reduced by the link mechanism, and the filter can be vibrated more effectively.

  Further, the vibration transmitting body has a first cylinder, a second cylinder, and a pressure-resistant pipe communicating with the working chamber of each of the first cylinder and the second cylinder, and the piston rod of the second cylinder is the engine. The piston rod of the first cylinder may be connected to the filter.

  Even in this case, the vibration of the engine can be transmitted to the filter by amplifying or reducing using the fluid, and the vibration transmitting body can be easily attached, thereby improving convenience.

  In addition, a vibration regulating member that collides with the vibrating filter may be disposed on the outer peripheral side of the filter.

  By doing so, an impact due to the collision between the filter and the vibration regulating member is applied to the filter, so that dust adhered to the filter can be further removed.

  As described above, according to the present invention, it is possible to reduce the adhesion of dust and the like to the filter without the need for labor, so that clogging of the filter can be effectively prevented, and the frequency of maintenance and filter replacement can be reduced. Can be reduced.

It is a schematic side view which shows the working machine in 1st Embodiment. It is the schematic which shows the principal part seen from the arrow Z direction in FIG. It is the schematic which shows the principal part seen from the arrow Y direction in FIG. It is the schematic which shows the principal part seen from the arrow X direction in FIG. It is a figure for demonstrating the operation | movement at the time of a driving | operation stop. It is a figure for demonstrating the operation | movement at the time of a driving | operation start. It is a figure for demonstrating the operation | movement at the time of a driving | operation. It is a figure for demonstrating the operation | movement after a driving | operation completion | finish. It is a figure for demonstrating the operation | movement after a driving | operation completion | finish. FIG. 3 is a view corresponding to FIG. 2 showing a modification of the first embodiment. FIG. 3 is a view corresponding to FIG. 2 showing a second embodiment. FIG. 9 is a view corresponding to FIG. 2 showing a third embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use.
<First Embodiment>
FIG. 1 shows a hydraulic excavator (work machine) in the present embodiment. In this hydraulic excavator, an upper swing body 2 is provided on a crawler type lower traveling body 1 so as to be capable of swinging. On the frame 2a of the upper swing body 2, an attachment 3, a cab 4, a machine room 5, and the like are disposed. The attachment 3 is disposed in the center of the front portion of the frame 2a, and includes a boom, an arm, a bucket, and the like. The cab 4 is disposed at the front left corner of the frame 2a, and is equipped with a driver's seat for operating the attachment 4 and various instruments. The machine room 5 is disposed at the rear of the frame 2a. For example, as shown in FIGS. 2 and 3, an engine 6 and a radiator 7 (heat exchanger) for driving the lower traveling body 1, the attachment 3, and the like are provided. Is housed.

  The machine room 5 has a lower surface defined by a frame 2a and an upper surface and side surfaces defined by a machine room cover 5a. The interior of the machine room 5 is further divided into a plurality of sections by a partition wall or the like.

  Specifically, an intake chamber 10, a ventilation chamber 11, and a drive device chamber 12 are formed in order from the left in a portion extending between the left and right ends in the width direction at the rear portion of the machine chamber 5. The intake chamber 10 and the vent chamber 11 are partitioned by a first partition wall 13, and the vent chamber 11 and the drive device chamber 12 are partitioned by a second partition wall 14. A rectangular first opening 15 opens laterally in the central portion of the first partition wall 13, and a rectangular second opening 16 also opens laterally in the central portion of the second partition wall 14. In the machine room cover 5 a, an intake port 17 is opened vertically in the upper portion of the intake chamber 10, and an exhaust port 18 is opened vertically in the upper right end of the drive device chamber 12.

  In the drive device chamber 12, an engine 6 and an operating pump (not shown) are disposed. The engine 6 is disposed such that the shaft 6 a extends along the width direction of the machine room 5. The engine 6 is supported by an engine mount 20 provided on the frame 2a via a damper 21 (vibration isolation device). The drive device chamber 12 may be partitioned into an engine chamber that houses the engine 6 and a pump chamber that houses a hydraulic oil pump or the like.

  A cooling fan 22 is disposed between the engine 6 and the second partition wall 14 and is connected to the shaft 6 a and is driven to rotate in conjunction with the operation of the engine 6. A predetermined air flow is formed in the machine chamber 5 by the rotation of the fan 22. Specifically, when the fan 22 rotates, outside air is taken into the machine chamber 5 from the intake port 17, and is sent out of the machine chamber 5 from the exhaust port 18 through the intake chamber 10, the ventilation chamber 11, and the drive device chamber 12 in order. It is. That is, a duct is constituted by these intake chambers 10 and the like, the upstream portion from the intake port 17 to the fan 22 corresponds to the intake duct 23, and the downstream portion from the fan 22 to the exhaust port 18 is the exhaust duct. 24.

  The second partition wall 14 is provided with a radiator 7 so as to close the second opening 16 with a ventilation surface through which air flows. A projecting duct 25 is provided on the second partition wall 14 so as to project toward the fan 22 from a portion around the radiator 7. The projecting duct 25 has a square cylindrical peripheral wall portion 25a and a front end wall portion 25b that closes the front end of the peripheral wall portion 25a. A circular air outlet 25c is opened in the front end wall portion 25b. The fan 22 is installed so as to be close to the periphery of the outlet 25c with a slight gap.

  A dustproof filter 30 is attached to the first partition wall 13 so as to close the first opening 15. The filter 30 has a rectangular plate shape, and includes a rectangular frame-shaped filter frame and a filter main body that is replaceably mounted inside the filter frame. The filter 30 has an inflow surface 30a through which air flows in and an outflow surface 30b through which air flows out. The inflow surface 30a extends in a substantially vertical direction and faces the intake chamber 10.

  A group of pores are formed through between the inflow surface 30a and the outflow surface 30b of the filter 30 (not shown). Therefore, during intake, large dust is removed by adhering to the surface of the filter 30 or being prevented from entering, and small dust entering the pores is removed by being trapped by an action such as adsorption.

  The filter 30 is supported on the first partition wall 13 via the vibration absorbing frame body 31. As shown in FIG. 4, the vibration absorbing frame 31 is a quadrangular frame-shaped member formed of a flexible material so as to be stretchable. Therefore, the filter 30 can swing freely in all directions inside the first opening 15.

  A cleaning member 40 is disposed on the inflow surface 30 a side of the filter 30. The cleaning member 40 includes a plurality of support bars 41, 41, ..., and a group of brushes 42, 42, ... supported by the support bars 41, 41, ..., respectively. Each support bar 41 is made of, for example, a substantially U-shaped member formed by bending a metal strip, and has a long brush support portion 41a and a short bend portion 41b connected to each end of the brush support portion 41a. , 41b. A plurality of brushes 42, 42,... Are fixed to the brush support portion 41a in a line.

  The support bars 41 are arranged in a grid pattern along the inflow surface 30a of the filter 30 so as to be arranged in the vertical direction at substantially equal intervals. Each support bar 41 is fixed to the first partition wall 13 by attaching the ends of the bent portions 41 b and 41 b to the first partition wall 13. Each brush 42 is arranged so as to be distributed substantially evenly with respect to the inflow surface 30a of the filter 30, and the tip portion thereof is positioned so as to come into contact with the inflow surface 30a and enter the pores.

  The filter 30 and the engine 6 are connected via a pair of support arm portions 50 and 50 (vibration transmission bodies). Specifically, each support arm portion 50 is made of a metal strip pressed product, and each base end portion thereof is fixed to each side portion of the engine 6. In the second partition wall 14, slits 51 that are slightly larger than the cross-sectional dimension of the support arm 50 are formed in two places, and each support arm 50 extends toward the filter 30 through these slits 51. Yes. The tip of each support arm 50 is fixed to the filter 30, and the filter 30 and the engine 6 are integrated. A flexible sealing member 52 is attached to the slit 51, and the gap between the second partition wall 14 and the support arm portion 50 is sealed.

  A dust receiving portion 60 is provided below the intake chamber 10 in order to temporarily store the dust that has entered the intake chamber 10.

  In the present embodiment, the bottom portion of the intake chamber 10 is formed in a rectangular box shape, and the dust receiving portion 60 is formed. The upper surface of the dust receiving portion 60 is a dust receiving port 60a that is open on the entire surface. The interior of the dust receiving part 60 is divided into two parts, a first receiving part 61 and a second receiving part 62, by a partition wall 60b. The first receiving part 61 extends so as to extend along the inflow surface 30a of the filter 30. Located on the lower side.

  An upper lid 63 is swingably supported at the upper end of the partition wall 60b. By swinging the upper lid 63, the dust receiving port 60a is switched between a first closed position that covers only the first receiving portion 61 side and a second closed position that covers only the second receiving portion 62 side, Only one of the first receiving portion 61 and the second receiving portion 62 can be selected and closed.

  The bottom wall of the dust receiving portion 60 can be opened and closed. That is, an opening 64 communicating with the outside is formed in a portion corresponding to the bottom surface of the intake chamber 10 in the frame 2 a, and the opening 64 is closed by the bottom lid 65. The bottom cover 65 is swingably supported by the frame 2a and can be opened as necessary.

  Next, the operation of the hydraulic excavator configured as described above will be described.

  FIG. 5 shows a state when the excavator is stopped. When the vehicle is stopped, the bottom cover 65 of the dust receiving unit 60 is normally closed, and the upper cover 63 is positioned at the second closed position so that the first receiving unit 61 receives dust. Since the intake port 17 is open in the vertical direction, dust falls into the intake chamber 10 from there. Dust that has entered the intake chamber 10 accumulates on the cleaning member 40, the inflow surface 30a of the filter 30, the first receiving portion 61, and the like. Never get in.

  When the engine 6 is started, as shown in FIG. 6, the engine 6 vibrates greatly at the initial stage, so that the vibration is transmitted from the support arm portion 50 to the filter 30 and the filter 30 swings. Then, the dust accumulated on the inflow surface 30a of the brush 42 and the filter 30 is shaken off and stored in the first receiving portion 61. At this time, the dust adhering to the inflow surface 30a of the filter 30 is swept away by the brush 42, and the tip portion of the brush 42 has entered the pores of the filter 30, so that fine dust that has entered the pores can also be obtained. Swept out at the same time.

  After a predetermined time has elapsed, the upper lid 63 of the dust receiving unit 60 is switched to the first closed position. By doing so, it is possible to prevent the dust accommodated in the first receiving portion 61 from rising during operation, and it is possible to prevent extra dust from adhering to the filter 30.

  When the engine 6 starts to operate stably, the cooling air is taken into the intake chamber 10 from the intake port 17 by the rotation of the fan 22, and an air flow as shown by an arrow line in FIG. 7 is formed. The air taken into the intake chamber 10 absorbs heat in the radiator 7 and the drive device chamber 12 through the filter 30 and the ventilation chamber 11, and is then discharged from the exhaust port 18 to the outside of the machine chamber 5. During the operation of the engine 6, a large amount of dust enters the intake chamber 10 by riding on the air flow.

  In the meantime, the engine 6 constantly vibrates and the filter 30 also swings, so that the adhesion of dust to the filter 30 is reduced by the vibration. Furthermore, since the inflow surface 30a of the filter 30 is brushed by the brush 42, it is possible to effectively prevent dust from adhering to the surface of the filter 30. Further, since the tip portion of the brush 42 has entered the pores, the brushing effect is exerted on the inside of the pores, and the amount of dust entering the filter 30 can be reduced.

  When the engine 6 is stopped, the engine 6 vibrates greatly as in the initial start of the engine 6, so that dust adhered to the filter 30 during the operation of the engine 6 is further shaken off or swept away, and the second It is accommodated in the receiving part 62.

  After the engine 6 is stopped, the upper lid 63 of the dust receiving portion 60 is switched to the second closed position as shown in FIG. By doing so, the dust deposited on the upper lid 63 can be accommodated in the second receiving portion 62, and the upper lid 63 can be reversed so that the surface free from dust can be directed upward.

  As shown in FIG. 9, finally, the bottom lid 65 is opened, and the dust stored in the first receiving portion 61 and the second receiving portion 62 may be collected and discarded to the outside.

  By so doing, it is possible to suppress the dust that has entered the intake chamber 10 while the engine 6 is stopped and the dust that has entered the intake chamber 10 during the operation of the engine 6 from adhering to or entering the filter 30. Therefore, clogging of the filter 30 can be effectively reduced, and the frequency of maintenance and filter replacement can be greatly reduced.

<Modification>
FIG. 10 shows a modification of the first embodiment. In this hydraulic excavator, a vibration regulating member that collides with the vibrating filter 30 is disposed on the outer peripheral side of the filter 30 in order to swing the filter 30 more effectively.

  Specifically, for example, a frame-like stopper 70 is provided in a portion around the first opening 15 in the first partition wall 13. The tip of the stopper 70 projects inward (collision part 70a). When the tip of the collision part 70a is positioned so as to be positioned between the first opening 15 and the filter 30, the filter 30 collides with the collision part 70a when the filter 30 is greatly shaken by the vibration of the engine 6. . Since the filter 30 receives an impact due to this collision, dust adhered to the filter 30 can be further removed. For example, it may be set so as to act only at the initial start or stop of the engine 6 where a large vibration occurs. Further, the vibration regulating member may be a plurality of protruding stoppers disposed on the four sides or four corners of the filter 30.

<Second Embodiment>
FIG. 11 shows a hydraulic excavator according to the present embodiment. This embodiment is the same as the first embodiment except that the configuration of the vibration transmitting body is different. Therefore, the same components are denoted by the same reference numerals, description thereof is omitted, and different points will be described in detail. .

  The vibration transmission body of this hydraulic excavator also has a pair of support arm portions 80 and 80 extending from the engine 6 toward the filter 30 as in the first embodiment. However, the base end portion of each support arm portion 80 is rotatably supported by the engine 6 via the second link pin 82. The distal end portion of the support arm portion 80 is rotatably supported by the filter 30 via the first link pin 81. And the intermediate part of each support arm part 50 is rotatably supported by the flange 83 (support part) provided in the 2nd partition wall 14 via the fulcrum pin 84. As shown in FIG.

  The first link pin 81, the second link pin 82, and the fulcrum pin 84 are arranged side by side in a horizontal direction orthogonal to the shaft 6a of the engine 6 so as to be substantially parallel to each other. The support arm 50 may be configured to be able to rotate only in a direction orthogonal to the pins 81, 82, and 84, or to be able to rotate in all directions around the pins 81, 82, and 84. There may be.

  The distance (L1) from the fulcrum pin 84 to the first link pin 81 and the distance (L2) from the fulcrum pin 84 to the second link pin 82 are set to have different sizes. By doing so, it is possible to amplify or reduce or adjust the vibration of the engine 6 transmitted to the filter 30. For example, in this embodiment, since the former is set larger than the latter, the vibration of the engine 6 can be amplified and transmitted to the filter 30. Therefore, the vibration of the engine 6 can be applied to the filter 30 more effectively, and the clogging of the filter 30 can be further reduced.

<Third Embodiment>
FIG. 12 shows a hydraulic excavator according to this embodiment. This embodiment is the same as the first embodiment except that the configuration of the vibration transmitting body is different. Therefore, the same components are denoted by the same reference numerals, description thereof is omitted, and different points will be described in detail. .

  The vibration transmitting body of this hydraulic excavator is designed to improve convenience by using a fluid.

  Specifically, the vibration transmission body includes a first cylinder 91, a second cylinder 92, and a pressure-resistant pipe 93 communicating with the working chambers 91b and 92b of each of the first cylinder 91 and the second cylinder 92, A second piston rod 92 a of the second cylinder 92 is connected to the engine 6, and a first piston rod 91 a of the first cylinder 91 is connected to the filter 30. The piston rods 91a and 92a are connected to pistons 91c and 92c that partition the working chambers 91b and 92b of the cylinders 91 and 92, respectively. Oil is sealed in the working chambers 91 b and 92 b and the pressure-resistant piping 93 of each cylinder 91 and 92.

  Therefore, when the engine 6 vibrates, the vibration is transmitted from the second cylinder 92 to the first cylinder 91 due to oil pressure fluctuation, and thus the filter 30 can be swung. Since the length and arrangement of the pressure-resistant piping 93 can be set relatively freely, it can be easily attached.

  In particular, the piston diameter of the first cylinder 91 and the piston diameter of the second cylinder 92 may be set to be different from each other. If it does so, it can amplify or reduce or adjust that the vibration of the engine 6 is transmitted to the filter 30. For example, in this embodiment, since the former is set smaller than the latter, the vibration of the engine 6 can be amplified and transmitted to the filter 30.

  The work machine according to the present invention is not limited to the above-described embodiment, and includes various other configurations.

  For example, the vibration regulating member can be applied not only to the first embodiment but also to the second embodiment and the third embodiment. The opening / closing operation of the bottom lid 65 and the top lid 63 of the dust receiving unit 60 may be performed manually, or may be automatically performed in conjunction with the operating state of the engine 6 by separately incorporating a control device. The filter 30 is preferably installed in an inclined state so that the inflow surface 30a faces downward. If it does so, it will become difficult for dust to adhere and it will become easy to sweep out with the brush 42.

DESCRIPTION OF SYMBOLS 5 Machine room 5a Machine room cover 6 Engine 7 Radiator 10 Air intake room 11 Venting room 12 Drive device room 13 1st division wall 14 2nd division wall 17 Intake port 18 Exhaust port 22 Fan 23 Intake duct 25 Projection duct 30 Filter 30a Inflow surface 31 Damping frame body 40 Cleaning member 41 Support bar 42 Brush 50 Support arm part (vibration transmission body)
60 Dust Receiving Portion 60a Dust Receiving Port 61 First Receiving Portion 62 Second Receiving Portion 63 Top Cover 65 Bottom Cover 70 Stopper (Vibration Control Member)
80 Support arm portion 81 First link pin 82 Second link pin 83 Flange (support portion)
84 fulcrum pin 91 first cylinder 91a first piston rod 91b working chamber 92 second cylinder 92a second piston rod 92b working chamber 93 pressure-resistant piping

Claims (9)

Engine,
An intake duct;
A fan disposed downstream of the intake duct and driven by the engine;
A filter disposed upstream of the intake duct and attached to block the passage of the intake duct;
In the machine room,
The filter has an inflow surface that faces the upstream side of the intake duct and extends in a substantially vertical direction, and is supported by the intake duct so as to vibrate via a vibration absorbing frame;
A work machine in which the filter and the engine are coupled via a vibration transmission body. The work machine according to claim 1,
A cleaning member having a group of brushes on the inflow surface side of the filter;
A work machine in which the cleaning member is fixed in the machine chamber so that a tip portion of the group of brushes is in contact with the inflow surface. The work machine according to claim 2,
The cleaning member has a plurality of support bars arranged in a lattice shape along the inflow surface,
A work machine in which the group of brushes are supported on each of the plurality of support bars. A working machine according to any one of claims 1 to 3,
An intake chamber partitioned by a partition wall is formed in the machine room,
The intake duct is provided in the intake chamber so that the inflow surface faces,
In the upper part of the intake chamber, an intake port for taking in outside air opens,
At the bottom of the intake chamber, a box-shaped dust receiving portion having a dust receiving opening on the upper surface is provided,
A working machine in which a bottom wall of the dust receiving part is openable and closable. The work machine according to claim 4,
The inside of the dust receiving part is partitioned into a first receiving part and a second receiving part,
The first receiving portion is located below the inflow surface;
An upper lid that is switchable between a first closed position that covers only the first receiving portion side and a second closed position that covers only the second receiving portion side of the dust receiving port is attached to the dust receiving portion. Working machine. A working machine according to any one of claims 1 to 5,
The vibration transmitting body has a support arm portion extending from the engine toward the filter,
A work machine in which a proximal end side of the support arm portion is fixed to the engine and a distal end side is fixed to the filter. A working machine according to any one of claims 1 to 5,
The vibration transmitting body has a support arm portion extending from the engine toward the filter,
A proximal end side of the support arm portion is rotatably supported by the engine via a second link pin, and a distal end side of the support arm portion is a first link substantially parallel to the second link pin on the filter. It is supported rotatably via a pin,
A work machine in which an intermediate portion of the support arm is rotatably supported by a support provided in the machine chamber via a fulcrum pin substantially parallel to the first link pin and the second link pin. A working machine according to any one of claims 1 to 5,
The vibration transmitting body includes a first cylinder, a second cylinder, and a pressure-resistant pipe communicating with the working chamber of each of the first cylinder and the second cylinder,
A work machine in which a piston rod of the second cylinder is connected to the engine, and a piston rod of the first cylinder is connected to the filter. A work machine according to any one of claims 1 to 8,
A work machine in which a vibration regulating member that collides with the vibrating filter is disposed on the outer peripheral side of the filter.

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