JP6692246B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator.

  In general, a construction machine is provided with an engine room, in which an engine, a cooler (a radiator, etc.) for cooling the engine, a fan for sending cooling air to the cooler, and the like are arranged. Patent Document 1 discloses a construction machine equipped with a dustproof device. The dustproof device is provided with a filter in order to prevent dust from flowing into the cooler. The filter is arranged on the upstream side of the cooler in the flow path of the cooling air formed by the rotation of the fan, and captures dust accompanying the cooling air. Therefore, the adhesion of dust to the cooler is suppressed. In addition, the dustproof device includes a dust removing unit that moves the filter upward and then drops the dust in order to remove the dust attached to the filter.

JP 2004-225624 A

  In the technique disclosed in Patent Document 1, the dust removing means is arranged close to the filter in order to move the filter upward. For this reason, the dust removing means is arranged at a position that blocks the attachment / detachment route of the filter with respect to the vehicle body. As a result, when the filter is attached or detached, it is necessary to remove or disassemble a part of the dust removing means, which complicates the attachment work of the filter.

  An object of the present invention is to provide a construction machine capable of easily attaching and detaching a filter and removing dust adhering to the filter.

  A construction machine according to an aspect of the present invention is a vehicle body, an engine, a cooler that cools the engine, a fan that sends cooling air to the cooler, and the cooler in a passage of the cooling air. A filter that is disposed on the upstream side of the vehicle and that allows the cooling air to pass through and that is removable from the vehicle body; a filter support portion that is disposed on the vehicle body and supports the filter; and a filter support portion that is supported by the filter support portion. The impact applying unit that detaches the dust collected by the filter by applying an impact to the filter, and the impact applying unit retracts from the attachment / detachment path through which the filter passes when attaching / detaching the filter, and the filter A support mechanism that supports the impact applying portion so as to be movable between a separated position that allows attachment / detachment of the filter and an operating position that blocks the attachment / detachment path and applies the impact to the filter. Having.

  According to this configuration, the filter prevents dust contained in the cooling air from adhering to the cooler. Further, even when dust adheres to the filter and the transmittance of the filter decreases, the impact can be applied to the filter by the impact applying unit to remove the dust. Furthermore, the impact imparting section is movable by the support mechanism between the separated position and the operating position. Therefore, it is possible to easily and smoothly attach and detach the filter.

  In the above configuration, between a lock position that blocks the attachment / detachment path and prevents the filter from being detached from the filter support portion, and a lock release position that retracts from the attachment / detachment path and allows attachment / detachment of the filter. The support mechanism further comprises a lock mechanism capable of changing a position, and the support mechanism is composed of the lock mechanism. When the lock mechanism is arranged in the lock release position, the impact applying section is arranged in the separated position. The impact imparting portion may be disposed at the operating position when the lock mechanism is disposed at the lock position.

  According to this configuration, the impact applying unit moves together with the lock mechanism, so that the filter can be smoothly attached and detached. Further, by disposing the lock mechanism at the lock position, detachment of the filter is prevented.

  In the above configuration, the lock mechanism includes a shaft portion supported by the vehicle body, and a movable member that includes a lock piece that locks the filter and is rotatable with respect to the shaft portion. In such a manner that the movable member is rotated around the shaft portion so that the lock piece arranged apart from the filter moves to the upstream side in the passage direction of the cooling air and comes into contact with the filter, It is desirable that the lock mechanism be moved to the lock position and the impact imparting section be arranged to face the filter.

  According to this configuration, the impact applying portion can be moved between the separated position and the operating position in addition to the position change of the lock mechanism by the rotation of the lock mechanism.

  In the above configuration, the filter is attached to the filter support portion while passing through the attachment / detachment path along an attachment direction that intersects the passage direction of the cooling air, and the two surfaces along the attachment direction and the cooling When the locking mechanism reaches the locking position, the locking piece has a surface on the rear end side in the mounting direction of the filter and an upstream side in the passing direction of the cooling air when the locking mechanism reaches the locking position. It may be arranged so as to press the side surface.

  According to this configuration, as the lock mechanism rotates, the lock piece can reliably press the two surfaces of the filter to lock the filter.

  In the above structure, the impact applying portion is supported by the cylinder so as to be movable between a cylinder, a protruding position protruding from the cylinder, and a retracted position retracted into the cylinder more than the protruding position. A plunger, and the filter support portion is arranged to support at least a lower end portion of the filter, the filter includes a pressed portion pressed by the plunger, the plunger Disposed below the pressed portion in the operating position, pushes up the filter with the movement from the retracted position to the projecting position, and drops the filter with the movement from the projecting position to the retracted position The impact may be applied to the filter by bringing it into contact with the filter support portion.

  According to this configuration, since the impact applying unit is formed of the solenoid, the filter can be easily moved up and down. Further, it is possible to detach dust from the filter by utilizing the energy when the filter is dropped.

  In the above structure, the movable member of the lock mechanism is disposed on the first plate rotatably supported on the shaft portion, and is arranged at a distance from the first plate to rotate on the shaft portion. A second plate that is movably supported, and the locking piece is arranged in the axial direction of the shaft portion so that the first plate and the second plate can rotate integrally around the shaft portion. The first plate and the second plate may be connected along the same.

  According to this configuration, since the lock mechanism includes the first plate and the second plate, the rigidity of the lock mechanism can be increased.

  In the above configuration, the shaft portion is arranged so as to extend in the vertical direction, the movable member is rotated around the shaft portion in the horizontal direction, and the movable member of the lock mechanism is the shaft. A lock plate and a first plate rotatably supported by the shaft portion; and a second plate rotatably supported by the shaft portion, the second plate being disposed above the first plate with a space therebetween. Is configured to connect the first plate and the second plate along a vertical direction so that the first plate and the second plate are integrally rotatable around the shaft portion, and the solenoid is The upper side is covered by the second plate and is fixed on the first plate so that the plunger protrudes upward, and the second plate has the distal end portion of the plunger pressed by the pressed position in the operating position. It said plunger to allow the counter may be one provided with a hole portion to be inserted into.

  According to this configuration, by disposing the solenoid between the first plate and the second plate of the lock mechanism, the lock mechanism and the impact imparting portion can be provided as compared with the case where the solenoid is disposed outside the lock mechanism. It can be set compactly.

  In the above configuration, the movable member may further include a protection member arranged on the upstream side of the solenoid in the flow path of the cooling air so as to cover the solenoid.

  According to this configuration, the protective member prevents dust contained in the cooling air from adhering to the solenoid.

  In the above configuration, the protection member may connect the first plate and the second plate along a vertical direction.

  According to this configuration, the protection member can enhance the rigidity of the lock mechanism.

  In the above configuration, the filter is mounted on the filter support portion along a mounting direction that intersects a direction in which the cooling air passes, and the impact applying portion faces a rear end side of the filter in the mounting direction. It may be supported on the vehicle body as described above.

  According to this configuration, even when another member is arranged on the upstream and downstream sides of the filter in the flow of the cooling air, the filter can be easily attached to and detached from the filter support portion. Further, when the impact applying section is moved to the operating position, the impact applying section is arranged so as to enter the attachment / detachment path on the rear end side in the mounting direction of the filter. Therefore, the impact applying unit can have a function of preventing detachment of the filter.

  In the above configuration, a sub-impact applying unit that is supported by the vehicle body so as to face the tip end side in the mounting direction of the filter, and imparts an impact to the filter to release the dust collected by the filter. May be further included.

  According to this configuration, since the secondary impact imparting portion is provided in addition to the impact imparting portion, dust can be stably desorbed from the filter.

In the above configuration, the impact applying portion and the sub impact applying portion are each movable between a cylinder, a projecting position projecting from the cylinder, and a retracted position retracted in the cylinder more than the projecting position. And a plunger supported by the cylinder, the movements of the plungers of the impact applying portion and the sub impact applying portion from the retracted position to the protruding position are controlled in synchronization with each other. Further, the abutting positions of the plungers of the impact applying portion and the secondary impact applying portion with respect to the filter may be arranged at substantially the same height.

  According to this structure, the filter can be vertically moved in a well-balanced manner by the plungers of the impact imparting portion and the sub impact imparting portion.

  According to the present invention, there is provided a construction machine capable of easily attaching and detaching a filter and removing dust adhering to the filter.

It is a typical side view of the construction machine concerning one embodiment of the present invention. It is sectional drawing of the inside of the machine room of the construction machine shown in FIG. It is a perspective view of the inside of the machine room of the construction machine shown in FIG. It is the filter (A) front view and (B) side view which concern on one Embodiment of this invention. It is a perspective view of the state where the lock mechanism concerning one embodiment of the present invention separated from the filter. It is a perspective view of the state where the filter was fixed by the lock mechanism concerning one embodiment of the present invention. In the construction machine which concerns on one Embodiment of this invention, it is a top view (A) and (B) which shows a mode that a filter is attached. It is a top view (A), (B) which shows a mode that a filter is attached in the construction machine concerning a modification embodiment of the present invention. In the construction machine which concerns on the modified embodiment of this invention, it is a top view (A), (B), and (C) showing signs that a filter is attached. It is a perspective view of a state where a lock mechanism according to a modified embodiment of the present invention fixes a filter.

  A hydraulic excavator 10 (construction machine) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic side view of a hydraulic excavator 10 according to an embodiment of the present invention. FIG. 2 is a sectional view of the inside of the guard 15 of the hydraulic excavator 10 shown in FIG. FIG. 3 is a perspective view of the inside of the guard 15 of the hydraulic excavator 10 shown in FIG.

  As shown in FIGS. 1 and 2, a hydraulic excavator 10 includes a lower traveling body 11 having a right traveling crawler and a left traveling crawler, and an upper revolving body 20 (vehicle body) rotatably provided on the lower traveling body 11. And a work attachment 13, a cab 14, and a guard 15.

  The work attachment 13 is attached to the upper revolving superstructure 20 so that it can be raised and lowered with respect to the upper revolving superstructure 20. The work attachment 13 has a boom 13a, an arm 13b connected to the tip of the boom 13a, and a bucket 13c attached to the tip of the arm 13b so as to be swingable with respect to the tip. The boom 13a is undulated with respect to the upper swing body 20 by the expansion and contraction operation of the boom cylinder 13d. The arm 13b swings with respect to the boom 13a by the extension / contraction operation of the arm cylinder 13e. The bucket 13c swings with respect to the arm 13b by the expansion and contraction operation of the bucket cylinder 13f. The boom cylinder 13d, the arm cylinder 13e, and the bucket cylinder 13f are hydraulic hydraulic cylinders.

  The cab 14 is arranged in front of the upper revolving structure 20, and the operator of the hydraulic excavator 10 gets on the board. Various operating members for driving and operating the hydraulic excavator 10 are arranged in the cab 14.

  The guard 15 is provided behind the cab 14. The guard 15 forms an engine room that houses the engine 31 (see FIG. 2) and the like. The appearance of the guard 15 is defined by the guard cover 16. As shown in FIG. 2, in the guard 15, an engine 31, a hydraulic pump 32, a cooler 33 such as a radiator, a fan 34, an intake duct 40, an air filter 50, and an air cleaner 55 (see FIG. 3). ), And are placed. The hydraulic pump 32 is connected to the right end of the drive shaft of the engine 31 and is located on the right side of the guard 15. When the opening / closing cover 18 (FIG. 3) forming a part of the guard cover 16 is opened, the inside of the guard 15 is opened to the outside of the hydraulic excavator 10 as shown in FIG.

  The fan 34 is connected to the drive shaft of the engine 31 and rotates according to the rotation of the engine 31. The rotation of the fan 34 forms the cooling air W (FIG. 2) sent from the outside of the guard 15 to the cooler 33.

  The cooler 33 is arranged on the left side of the fan 34. The cooler 33 cools the cooling medium by exchanging heat between the cooling medium for cooling the engine 31 and the cooling air W. The radiator included in the cooler 33 is arranged so that its core surface faces the vehicle left-right direction.

  As shown in FIG. 2, the air filter 50 is arranged on the upstream side (left side in the present embodiment) of the cooler 33 in the flow path of the cooling air W. The air filter 50 allows the cooling air W to pass therethrough, and also collects (removes) dust accompanying the cooling air W. Therefore, adhesion of dust to the cooler 33 is suppressed. The air filter 50 is attachable to and detachable from the guard 15 of the upper swing body 20.

  With reference to FIG. 2, the intake duct 40 has a box-shaped duct body 41 that opens from the upstream side to the downstream side in the air flow direction. The duct body 41 is arranged between the air filter 50 and the cooler 33, and guides the cooling air W passing through the air filter 50 to the cooler 33. Further, the duct body 41 is provided with an air filter mounting portion 42 (FIG. 3) for supporting the air filter 50 and a device mounting portion 56 (FIG. 3) for mounting an air cleaner 55 as a device.

  The air cleaner 55 is for collecting the air supplied to the engine 31, and is connected to the intake pipe 55a bypassed from the duct body 41 and the exhaust pipe 55b toward the engine 31.

  The air filter attachment portion 42 (filter support portion) is provided in the opening on the upstream side of the duct body 41, and the air filter 50 is detachably attached thereto. Specifically, the air filter attachment portion 42 is arranged on the front side of the vehicle, and a pair of guide plates 43 (upper guide 43a and lower guide 43b) arranged along the upper and lower surfaces of the air filter 50, respectively. And a filter holder 44. Further, the upper-part turning body 20 has a lock member 60 (FIG. 3) (lock mechanism) arranged on the vehicle rear side of the air filter 50.

  The pair of guide plates 43 accommodate the air filter 50 therebetween. Further, the pair of guide plates 43 function as guides for guiding the air filter 50 when the air filter 50 is attached and detached. The lower guide 43b extends long in the front-rear direction so as to support the lower end of the air filter 50 (see FIG. 4A).

  FIG. 4 is a front view (A) and a side view (B) of the air filter 50 and the air filter mounting portion 42 according to the present embodiment. FIG. 5 is a perspective view showing a state in which the lock member 60 according to the present embodiment is arranged at the lock release position separated from the air filter 50. FIG. 6 is a perspective view showing a state in which the lock member 60 according to the present embodiment is arranged at the lock position for fixing the air filter 50. FIG. 7 is a plan view (A) and (B) showing how the air filter 50 is mounted.

  With reference to FIG. 4A, the air filter 50 has a mesh-shaped filter portion 500 (mesh portion) that collects dust, and a frame portion 500S that supports the four sides of the filter portion 500. In the present embodiment, the filter unit 500 has a rectangular shape. The frame portion 500S includes an upper frame 501, a lower frame 502, a front frame 503, a rear frame 504, a front protrusion 505, and a rear protrusion 506 (pressed portion). The upper frame 501, the lower frame 502, the front frame 503, and the rear frame 504 support the upper portion, the lower portion, the front portion, and the rear portion of the filter unit 500, respectively.

  The front protrusion 505 is a rectangular parallelepiped-shaped protrusion fixed to the front frame 503 so as to project forward from the front frame 503. The front protrusion 505 may be integrally formed with the front frame 503. Similarly, the rear protrusion 506 is a rectangular parallelepiped-shaped protrusion fixed to the rear frame 504 so as to protrude rearward from the rear frame 504. The rear protrusion 506 may also be formed integrally with the rear frame 504. The front protrusion 505 and the rear protrusion 506 are pushed upward by a front plunger 701 and a rear plunger 711 (FIG. 4) described later.

  With reference to FIGS. 7A and 7B, in the present embodiment, the air filter 50 has a mounting direction (FIG. 7) that intersects with the direction in which the cooling air W passes through the air filter 50 (see FIG. 2, left-right direction). Is attached to and detached from the air filter attachment portion 42 (FIG. 3) along the arrow D71 of FIG. At this time, the path through which the air filter 50 passes through the guard 15 is defined as the attachment / detachment path P. The above-mentioned filter holding part 44 positions the front frame 503 side of the air filter 50 in the front-rear and left-right directions by contacting the side wall surface of the front frame 503 (FIG. 4) of the air filter 50. With such a configuration, even when other members such as the air cleaner 55 and the duct body 41 are arranged on the upstream and downstream sides of the air filter 50 in the flow of the cooling air W, the air filter 50 can be easily attached and detached. can do.

With reference to FIG. 3, the lock member 60 is rotatably supported by a main body rear wall 41R that is a rear wall surface of the duct main body 41. The lock member 60 has a function of preventing the air filter 50 from being detached from the air filter attachment portion 42. Then, the lock member 60 is
The lock release position that is arranged apart from the attachment / detachment path P (FIG. 7A) of the air filter 50 to allow attachment / detachment of the air filter 50, and the air filter 50 arranged in the attachment / detachment path P from the air filter attachment portion It is possible to change the position between the lock position and the lock position to prevent detachment. In addition, referring to FIGS. 5 and 6, the lock member 60 holds the movable member 61 that can come into contact with the air filter 50, the shaft member 65 that serves as the rotation center axis of the movable member 61, and the shaft member 65. And a holding member 68 that operates.

  The movable member 61 includes a lock plate 62 (lock piece) bent and formed so as to contact the rear and left wall surfaces of the rear frame 504 of the air filter 50, and an arm plate 63 integrally formed with the lock plate 62. Have. The lock plate 62 has a function of contacting the air filter 50 and locking the air filter 50. The lock plate 62 and the arm plate 63 are formed by bending one plate material. The arm plate 63 includes a lower plate 631 (first plate) and an upper plate 632 (second plate) (FIG. 6). The lower plate 631 and the upper plate 632 are composed of a pair of upper and lower plate-shaped portions that are bent outward from both upper and lower edges of the surface of the lock plate 62 that abuts the rear frame 504 of the air filter 50. The lower plate 631 and the upper plate 632 are rotatably supported by a central shaft portion 65a described later. Further, the upper plate 632 is arranged above the lower plate 631 with a space. In other words, with respect to the lock plate 62 and the arm plate 63, the lock plate 62 has an axial direction of the central shaft portion 65a so that the lower plate 631 and the upper plate 632 can be integrally rotated around the central shaft portion 65a. The lower plate 631 and the upper plate 632 are connected along the (vertical direction).

  The lock plate 62 contacts the rear frame 504 of the air filter 50 to sandwich and fix the air filter 50 with the filter holding portion 44 (FIG. 3). The lock plate 62 is rotated around the central shaft portion 65a of the shaft member 65 together with the arm plate 63, so that the lock plate 62 has a lock position for fixing the air filter 50 and a release position for releasing the locked state of the air filter 50. It is possible to move between them.

  The arm plate 63 is formed with a central shaft insertion hole 63a through which the central shaft portion 65a of the shaft member 65 is inserted and an engagement shaft insertion hole 63b through which the engagement shaft portion 65b of the shaft member 65 can be inserted. (Fig. 5). The central shaft insertion hole 63 a extends in the vertical direction and is formed so as to penetrate the pair of upper and lower plates 631 and 632 of the arm plate 63. The engagement shaft insertion hole 63b is formed in the upper plate 632 of the arm plate 63. A holding member 68 is arranged between the lower plate 631 and the upper plate 632 of the arm plate 63. Further, a spacer member 69 is arranged between the upper plate 632 of the arm plate 63 and the upper surface of the holding member 68.

  The shaft member 65 has a central shaft portion 65a (shaft portion) that is the center of rotation of the movable member 61, and an engagement shaft portion 65b that extends in parallel with the central shaft portion 65a. The central shaft portion 65a and the engaging shaft portion 65b are formed by bending a single shaft member, and the length of the central shaft portion 65a is set to be longer than the length of the engaging shaft portion 65b. Stopper plates 66 are fixed above and below the arm plate 63 in the central shaft portion 65a. Between the lower stopper plate 66 and the lower plate 631 of the arm plate 63, a direction in which the upper stopper plate 66 abuts the upper plate 632 of the arm plate 63, in other words, the central shaft portion 65a moves downward. A compression spring 67 that biases the holding member 68 so as to move is provided.

  The holding member 68 is formed by bending one plate member into a U-shape. The holding member 68 is provided with a holding hole 68a that penetrates a pair of upper and lower plate-shaped portions that are formed by bending, and an engagement hole 68b that is formed by cutting out the upper plate-shaped portion. The central shaft portion 65a of the shaft member 65 is held in the holding hole 68a so as to be movable in the axial direction. Then, when the central shaft portion 65a is moved in the axial direction, the engagement shaft portion 65b is interlocked and moved in the axial direction. According to this operation, the engagement shaft portion 65b can be engaged with the engagement hole 68b.

  In the state where the lock member 60 is arranged at the lock position in FIG. 6, the lock plate 62 of the movable member 61 is in contact with the rear side wall surface and the upstream surface of the rear wall 504 of the air filter 50. As a result, the air filter 50 is sandwiched between the filter holding portion 44 (FIG. 3) and the lock plate 62. In other words, the air filter 50 is attached to the air filter attachment portion 42 while passing through the attachment / detachment path P along the attachment direction intersecting the passage direction of the cooling air. Further, the air filter 50 has a rectangular parallelepiped shape including two surfaces along the mounting direction and four surfaces along the cooling air passage direction. Then, when the lock member 60 reaches the lock position, the lock plate 62 is arranged to press the surface of the air filter 50 on the rear end side in the mounting direction and the surface on the upstream side in the passage direction of the cooling air.

  Then, at this lock position, the engaging shaft portion 65b of the shaft member 65 is engaged with the engaging hole 68b of the holding member 68, whereby the rotational movement of the movable member 61 is restricted. At this time, the engagement shaft portion 65b is biased by the biasing force of the compression spring 67 so as to move downward. Therefore, the engagement shaft portion 65b is prevented from unintentionally coming off the engagement hole 68b. As a result, the lock member 60 is fixed at the lock position, and the air filter 50 is prevented from being detached from the air filter attachment portion 42.

  On the other hand, when the air filter 50 is removed from the air filter attachment portion 42, the engagement shaft portion 65b of the shaft member 65 is moved upward against the biasing force of the compression spring 67. That is, the lower end of the engagement shaft portion 65b is pulled up to a position above the upper surface of the holding member 68, and the engagement state between the engagement shaft portion 65b and the engagement hole 68b is released. As a result, the rotational movement of the lock member 60 (movable member 61) is allowed. Then, the movable member 61 is rotated about the central shaft portion 65a in the horizontal direction and moved to the unlocked position (FIG. 5), whereby the lock plate 62 of the movable member 61 and the rear frame of the air filter 50 are moved. The contact state with the side wall surface of 504 is released.

  After the air filter 50 is attached to the air filter attachment portion 42 along the arrow D71 direction as shown in FIG. 7A, the lock member 60 arranged at the unlock position is indicated by the arrow around the central shaft portion 65a. It is rotated in the D72 direction. At this time, the lock plate 62 moves upstream in the cooling air passage direction. Then, as shown in FIG. 7B, the lock member 60 is again arranged at the lock position. At this time, the lock member 60 is arranged so as to enter the attachment / detachment path P of the air filter 50. As described above, in the present embodiment, the rotation of the lock member 60 around the central shaft portion 65a allows the position of the lock member 60 to be changed between the locked position and the unlocked position.

  Further, the hydraulic excavator 10 includes a front solenoid 70 (FIG. 4 (A), FIG. 6) (impact imparting portion) and a rear solenoid 71 (FIG. 4 (A)) (sub impact imparting portion). The front solenoid 70 and the rear solenoid 71 detach the dust trapped by the air filter 50 by applying an impact to the air filter 50 supported by the air filter mounting portion 42. The front solenoid 70 and the rear solenoid 71 are solenoids provided with a retractable plunger that pushes up the air filter 50 from below. As shown in FIG. 4A, the front solenoid 70 has a front plunger 701 and the rear solenoid 71 has a front plunger 701.

  The front plunger 701 is supported by a cylinder (not shown) provided in the front solenoid 70. The front plunger 701 is movable between a projecting position projecting from the cylinder and a retracted position retracted in the cylinder more than the projecting position. Similarly, the rear plunger 711 is supported by a cylinder (not shown) provided in the rear solenoid 71. The rear plunger 711 is movable between a projecting position projecting from the cylinder and a retracted position retracted in the cylinder more than the projecting position. The front solenoid 70 and the rear solenoid 71 are connected to a power source (not shown) provided in the upper swing body 20, and a retracting operation of the front plunger 701 and the rear plunger 711 is controlled by a control unit (not shown). The front plunger 701 and the rear plunger 711 are preferably push solenoids. In this case, when the front solenoid 70 and the rear solenoid 71 are not energized, the front plunger 701 and the rear plunger 711 are in the retracted state. Therefore, the front plunger 701 does not project during the attachment / detachment operation of the air filter 50, interference between the front plunger 701 and the air filter 50 is suppressed, and synchronous control of the front plunger 701 and the rear plunger 711 is realized. It

  Referring to FIG. 4A, the front solenoid 70 is supported by the guard 15 of the upper swing body 20 so as to face the front end side (front side) of the air filter 50 in the mounting direction. Specifically, the front solenoid 70 is fixed to a support plate 70S attached to a front wall 151 (FIG. 4A) provided upright in the guard 15. The front solenoid 70 is arranged to face the front frame 503 of the air filter 50 in the front-rear direction. Further, when the air filter 50 is attached to the air filter attachment portion 42, the front plunger 701 of the front solenoid 70 is arranged immediately below the front protrusion 505 of the air filter 50.

  On the other hand, referring to FIGS. 4A and 6, the rear solenoid 71 is provided in the above-mentioned lock member 60 and faces the rear end side in the mounting direction of the air filter 50. That is, in the present embodiment, the rear solenoid 71 blocks the attachment / detachment path P and the separated position where the rear solenoid 71 retracts from the attachment / detachment path P through which the air filter 50 passes and allows the attachment / detachment of the air filter 50. The lock member 60 supports the rear solenoid 71 so that the lock member 60 can be moved to and from an operating position where a shock is applied to the 50. Specifically, the rear solenoid 71 is fixed to the upper surface of the lower plate 631 of the lock member 60. The upper plate 632, which is arranged above the lower plate 631 with a space, covers the upper portion of the rear solenoid 71. At this time, the rear plunger 711 of the rear solenoid 71 projects upward. A hole 63S is opened in the upper plate 632. The rear plunger 711 of the rear solenoid 71 is inserted through the hole 63S, and the tip of the rear plunger 711 is arranged to face the rear protrusion 506 (pressed portion) of the air filter 50. As described above, by disposing the rear solenoid 71 between the lower plate 631 and the upper plate 632 of the lock member 60, as compared with the case where the rear solenoid 71 is arranged outside the lock member 60, the lock member 60 is disposed. And the rear solenoid 71 can be set compactly.

  6, when the lock member 60 is arranged at the lock position, the rear solenoid 71 is arranged in the attachment / detachment path P of the air filter 50 (FIG. 7A) so as to face the air filter 50. The filter 50 is placed in an operating position (FIG. 6) that impacts it. At this time, the rear plunger 711 (FIG. 6) protruding from the hole 63S is arranged immediately below (below) the rear protrusion 506 of the air filter 50. Therefore, the rear plunger 711 can quickly move the air filter 50 upward. On the other hand, as shown in FIGS. 5 and 7 (A), when the lock member 60 is arranged at the unlocked position, the rear solenoid 71 is arranged apart from the attachment / detachment path P to allow the attachment / detachment of the air filter 50. Placed in position.

  As shown in FIG. 4 (A), when the air filter 50 is attached to the air filter mounting portion 42 and the lock member 60 locks the air filter 50, an impact imparting operation on the air filter 50 by the front solenoid 70 and the rear solenoid 71. Is possible. When dust adheres to the air filter 50 due to use of the hydraulic excavator 10 and the transmittance of the air filter 50 decreases, the impact applying operation is executed at preset intervals. When the control unit (not shown) causes the front plunger 701 and the rear solenoid 71 to project, the front plunger 701 and the rear plunger 711 push up the front protrusion 505 and the rear protrusion 506, respectively, so that the air filter 50 moves upward. Be moved to. Then, as the front plunger 701 and the rear plunger 711 are retracted, the air filter 50 falls by its own weight and comes into contact with the lower guide 43b of the air filter mounting portion 42. Due to the impact at this time, the dust collected in the filter portion 500 of the air filter 50 is detached and drops. Therefore, the transmittance of the air filter 50 is restored, the cooling performance of the cooler 33 is stably maintained, and overheat of the cooler 33 is prevented. The impact applying operation to the air filter 50 may be continuously performed a plurality of times. Further, it is desirable that the rotation of the fan 34 is stopped when the impact applying operation is executed. In this case, since the flow of the cooling air W is suppressed, it is possible to promote the fall of dust. Therefore, when the impact applying operation to the air filter 50 is performed in conjunction with the stop of the engine 31 or the fan 34, the collection surface of the air filter 50 can be stably maintained in a cleaned state. ..

  As shown in FIG. 4, in the present embodiment, the contact positions of the front plunger 701 of the front solenoid 70 and the rear plunger 711 of the rear solenoid 71 with respect to the air filter 50 (the front protrusion 505 and the rear protrusion 506) are as follows. They are arranged at approximately the same height. Further, the protrusion operation of the front plunger 701 and the rear plunger 711 by the control unit (not shown) is controlled in synchronization. Therefore, the front side portion and the rear side portion of the air filter 50 are moved up and down simultaneously and in good balance.

  As described above, according to the present embodiment, the rear solenoid 71 is movable between the separated position and the operating position. At the separated position, the rear solenoid 71 is arranged apart from the attachment / detachment path P of the air filter 50 to allow attachment / detachment of the air filter 50. Therefore, the attachment / detachment of the air filter 50 can be realized easily and smoothly. Further, since the lock member 60 supports the rear solenoid 71 as the supporting mechanism of the present invention, the rear solenoid 71 moves together with the lock member 60, so that the air filter 50 can be smoothly attached and detached. Further, by disposing the lock member 60 at the lock position, the detachment of the air filter 50 is prevented.

  Further, in the present embodiment, the impact applying portion that imparts an impact to the air filter 50 is configured by the solenoid, so that the air filter 50 can be easily moved up and down. In addition, the energy when the air filter 50 is dropped can be used to detach the dust from the air filter 50.

  Further, in the present embodiment, the position of the lock member 60 can be changed between the lock position and the lock release position by rotating the lock member 60 around the central shaft portion 65a. Then, in addition to changing the position of the lock member 60, the rear solenoid 71 can be moved between the separated position and the operating position.

  Although the hydraulic excavator 10 including the air filter 50 according to the embodiment of the present invention has been described above, the present invention is not limited to these embodiments. The following modified embodiments are possible as the construction machine according to the present invention.

  (1) In the above embodiment, the front solenoid 70 and the rear solenoid 71 are used as the impact imparting portion and the sub impact imparting portion of the present invention, but the present invention is not limited to this. Each impact applying portion may be made of another structure such as a magnet, a motor and a spring mechanism, and may be any one as long as it imparts impact or vibration to the air filter 50 to remove dust. The hydraulic excavator 10 may not include the front solenoid 70 and may include only the rear solenoid 71.

  (2) In each of the above embodiments, the rear solenoid 71 is provided in the lock member 60, but the present invention is not limited to this. The rear solenoid 71 may have a structure different from that of the lock member 60. As an example, above the lock member 60, the rear solenoid 71, like the lock member 60, is rotatable around a shaft portion (not shown) so that the rear solenoid 71 can move between the separated position and the operating position. Good. Further, the hydraulic excavator 10 may not include the lock member 60, but may include only the rear solenoid 71 rotatably supported as described above. Also in this case, when the rear solenoid 71 is moved to the operating position, the rear solenoid 71 is arranged so as to enter the attachment / detachment path P on the rear end side in the mounting direction of the air filter 50. Therefore, the rear solenoid 71 can have a function of preventing the air filter 50 from being detached.

  (3) Further, in the above embodiment, as shown in FIG. 7A, the air filter 50 is mounted on the air filter mounting portion 42 along the mounting direction that is one direction. The present invention is not limited to this. FIG. 8 is a plan view (A) and (B) showing how the air filter 50 (filter) is mounted in the construction machine according to the modified embodiment of the present invention. In the present modified embodiment, the air filter 50 is inserted into the filter holding portion 44 along the mounting direction (arrow D81) that intersects the front-rear direction and the left-right direction. At this time, it is desirable that the opening width of the filter holding portion 44 be larger than that in the previous embodiment so that the air filter 50 can be tilted. Further, it is more desirable to provide an elastic member 441 such as a sponge in order to suppress the rattling of the air filter 50 after mounting. In addition, in the state shown in FIG. 8A, the lock member 60 is arranged at the lock release position. Further, the rear solenoid (not shown) provided in the lock member 60 is arranged at the separated position.

  When the front end portion of the air filter 50 is held by the filter holding portion 44, the rear end side of the air filter 50 is rotated in the arrow D82 direction. After that, when the lock member 60 is rotated around the central shaft portion 65a in the direction of the arrow D83 and is arranged at the lock position, the rear solenoid is arranged at the operating position. Even with such a configuration, the attachment / detachment of the air filter 50 can be easily and smoothly realized. Even if dust adheres to the air filter 50 and the transmittance of the air filter 50 decreases, the dust can be removed by the impact of the rear solenoid on the air filter 50.

  (4) In the above embodiment, the lock member 60 including the rear solenoid 71 is described as being rotated about the central shaft portion 65a (Fig. 6), but the present invention is not limited to this. Not something. FIG. 9 is a plan view (A), (B) and (C) showing how the air filter 50 is mounted in the construction machine according to the modified embodiment of the present invention. In the present modified embodiment, the rear wall portion 41R of the duct body 41 (FIG. 3) includes the support portion 80 extending in the horizontal direction. A substantially L-shaped guide groove 81 is formed in the support portion 80. The lock member 82 that supports a rear solenoid (not shown) similar to the rear solenoid 71 (FIG. 6) includes a moving shaft 82 a that is engaged with the guide groove 81. When the air filter 50 is mounted on the air filter mounting portion 42 (FIG. 6), the lock member 82 is arranged at the unlocked position shown in FIG. 9 (A). After that, the lock member 82 is moved in the direction of the arrow D91 along the guide groove 81, and is arranged at the position shown in FIG. 9 (B). Further, the lock member 82 is moved in the direction of the arrow D92 along the guide groove 81, and is arranged at the lock position shown in FIG. 9C. Even with such a configuration, the attachment / detachment of the air filter 50 can be easily and smoothly realized.

  (5) Further, in the above embodiment, the lock member 60 supporting the rear solenoid 71 has been described as having the structure shown in FIG. 6, but the present invention is not limited to this. FIG. 10 is a perspective view showing a state in which the lock member 60 according to the modified embodiment of the present invention locks the air filter 50. In this modified embodiment, the lock member 60 includes a cover 90 (protective member). The cover 90 is a plate-shaped member arranged so as to cover the solenoid 71 on the upstream side of the rear solenoid 71 in the flow path of the cooling air W (FIG. 2). Specifically, the cover 90 is a plate-shaped member that extends in the vertical direction so as to connect the lower plate 631 and the upper plate 632 of the arm plate 63 on the left side and the rear side of the rear solenoid 71. By providing such a cover 90, it is possible to prevent dust contained in the cooling air W from adhering to the rear solenoid 71. Further, the operator of the hydraulic excavator 10 is prevented from accidentally touching the rear solenoid 71. Therefore, the failure and malfunction of the rear solenoid 71 are suppressed. Further, when the cover 90 has a structure in which the lower plate 631 and the upper plate 632 are connected, the rigidity of the lock member 60 can be increased.

  (6) In the above embodiment, the hydraulic excavator 10 is used as the construction machine according to the present invention, but the present invention is not limited to this. The present invention may be applied to other construction machines such as cranes and excavators.

10 Hydraulic excavator (construction machinery)
11 Lower Traveling Body 13 Work Attachment 14 Cab 15 Guard 16 Guard Cover 18 Opening / Closing Cover 20 Upper Revolving Body 31 Engine 32 Hydraulic Pump 33 Cooler 34 Fan 40 Intake Duct 41 Duct Body 42 Air Filter Attachment (Filter Support)
43 guide plate 43a upper guide 43b lower guide 44 filter holding portion 50 air filter (filter)
500 Filter (mesh)
501 Upper frame 502 Lower frame 503 Front frame 504 Rear frame 505 Front protrusion 506 Rear protrusion (Pressed portion)
500S frame 60 lock member (lock mechanism, support mechanism)
61 movable member 62 lock plate (lock piece)
63 Arm plate 631 Lower plate (first plate)
632 Upper plate (second plate)
63S hole portion 65 shaft member 65a central shaft portion (shaft portion)
70 Front solenoid (secondary impact applying part)
701 front plunger 71 rear solenoid (impact applying part)
711 Rear plunger 90 cover (protective member)

Claims (12)

A construction machine,
The car body,
Engine,
A cooler for cooling the engine,
A fan that sends cooling air to the cooler,
A filter that is arranged on the upstream side of the cooler in the flow path of the cooling air, passes the cooling air, and is removable from the vehicle body,
A filter support portion that is disposed on the vehicle body and supports the filter;
An impact imparting portion that detaches the dust collected in the filter by imparting an impact to the filter supported by the filter support portion,
When the filter is attached or detached, the impact applying portion is separated from an attachment / detachment path through which the filter passes to allow the filter to be attached / detached, and an operating position for blocking the attachment / detachment path and applying the impact to the filter. A support mechanism that supports the impact applying section so as to be movable between them. The position can be changed between a lock position that blocks the attachment / detachment path and prevents the filter from being detached from the filter support portion, and a lock release position that retracts from the attachment / detachment path and allows attachment / detachment of the filter. It also has a lock mechanism,
The support mechanism is composed of the lock mechanism,
The impact imparting portion is disposed at the separated position when the lock mechanism is disposed at the lock release position, and the impact imparting portion is disposed at the operating position when the lock mechanism is disposed at the lock position. The construction machine according to Item 1. The lock mechanism includes a shaft portion supported by the vehicle body, and a movable member that includes a lock piece that locks the filter and is rotatable with respect to the shaft portion,
The movable member is rotated around the shaft portion so that the lock piece, which is arranged apart from the filter in the unlocked position, moves to the upstream side in the passage direction of the cooling air and contacts the filter. Thus, the construction machine according to claim 2, wherein the lock mechanism is moved to the lock position, and the impact applying unit is arranged to face the filter. The filter is mounted on the filter support portion while passing through the attachment / detachment path along a mounting direction that intersects the passing direction of the cooling air, and the two surfaces along the mounting direction and the passing direction of the cooling air. It consists of a rectangular parallelepiped shape including the four sides along
When the lock mechanism reaches the lock position, the lock piece is arranged so as to press a surface of the filter on the rear end side in the mounting direction and a surface on the upstream side in the passage direction of the cooling air. The listed construction machinery. The impact applying unit,
A cylinder,
A plunger supported by the cylinder so as to be movable between a projecting position projecting from the cylinder and a retracted position retracted in the cylinder more than the projecting position;
A solenoid having
The filter support portion is arranged to support at least a lower end portion of the filter,
The filter includes a pressed portion that is pressed by the plunger,
The plunger is disposed below the pressed portion in the operating position, pushes up the filter with the movement from the retracted position to the protruding position, and moves with the movement from the protruding position to the retracted position. The construction machine according to claim 3, wherein the impact is applied to the filter by dropping the filter and bringing the filter into contact with the filter support portion. The movable member of the lock mechanism,
A first plate rotatably supported on the shaft,
A second plate disposed at a distance from the first plate and rotatably supported by the shaft portion;
Equipped with
The lock piece includes the first plate and the second plate along the axial direction of the shaft portion so that the first plate and the second plate can integrally rotate about the shaft portion. The construction machine according to claim 3, wherein the construction machine is connected. The shaft portion is arranged so as to extend along the vertical direction, the movable member is rotated around the shaft portion along the horizontal direction,
The movable member of the lock mechanism,
A first plate rotatably supported on the shaft,
A second plate disposed above the first plate at a distance and rotatably supported by the shaft portion;
Equipped with
The lock piece connects the first plate and the second plate along a vertical direction so that the first plate and the second plate can integrally rotate about the shaft portion,
The solenoid is fixed on the first plate so that the upper side is covered by the second plate and the plunger projects upward.
The construction machine according to claim 5, wherein the second plate includes a hole portion through which the plunger is inserted such that a tip end portion of the plunger can face the pressed portion at the operating position.   The construction machine according to claim 7, wherein the movable member further includes a protection member arranged on the upstream side of the solenoid in the flow path of the cooling air so as to cover the solenoid.   The construction machine according to claim 8, wherein the protection member connects the first plate and the second plate along a vertical direction. The filter is mounted on the filter support portion along a mounting direction that intersects a direction in which the cooling air passes,
The construction machine according to any one of claims 1 to 3, wherein the impact applying section is supported by the vehicle body so as to face a rear end side of the filter in the mounting direction.   The auxiliary impact imparting portion, which is supported by the vehicle body so as to face the front end side in the mounting direction of the filter, detaches dust collected by the filter by imparting an impact to the filter. The construction machine according to item 10. The impact applying section and the sub impact applying section, respectively,
A cylinder,
A plunger supported by the cylinder so as to be movable between a projecting position projecting from the cylinder and a retracted position retracted in the cylinder more than the projecting position;
A solenoid having
The movement operations of the plungers of the impact applying portion and the sub impact applying portion from the retracted position to the protruding position are controlled in synchronization with each other,
The construction machine according to claim 11, wherein the abutting positions of the plungers of the impact applying portion and the secondary impact applying portion with respect to the filter are arranged at substantially the same height.

Images