Dust collection mechanism for construction machinery and construction machinery equipped with the same

Abstract

To provide a dust collection mechanism 50 of a construction machine which can remove foreign objects included in cooling air while securing a flow rate of the cooling air sufficiently.SOLUTION: A dust collection mechanism 50 includes multiple panel members 60 forming multiple air passages 54. Each of the panel members 60 has: a direction change part 64 which changes an air flow direction; and a space defining part 66 which defines a dust collecting space 68 at the downstream side of the direction change part 64. Each of the air passages 54 has a shape such that a direction of air flowing through the air passage 54 includes a vector component in a forward direction Dn at an arbitrary spot in the air passage 54 extending from an intake port to a cooler.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a dust collection mechanism for construction machinery and a construction machinery equipped with the same.

Background Art

[0002] Conventionally, a construction machine equipped with a machine room and a dust collection mechanism is known. The machine room is disposed at the rear of the upper swing body of the construction machine and houses an engine, a cooler and a cooling fan for cooling the engine. The cooling fan generates cooling air flowing from an air inlet toward the cooler. The cooler performs heat exchange between the cooling air passing through the cooler and a refrigerant (for example, cooling water) flowing through the cooler, thereby cooling the engine. The dust collection mechanism is disposed upstream of the cooler and collects foreign matters such as dust contained in the cooling air directed toward the cooler.

[0003] Patent Document 1 discloses a dust collection mechanism including an air introduction side panel member and a guide panel member. The air introduction side panel member is disposed on one side body side surface portion of the upper swing body and has a plurality of air inlets. The guide panel member is disposed opposite to the air introduction side panel member and has a plurality of air outlets. Air is taken in between the air introduction side panel member and the guide panel member from the plurality of air inlets. While the air passes between the air introduction side panel member and the guide panel member, the flow direction of the air is reversed twice. Specifically, the air flow introduced from one side body side surface portion and directed in a direction opposite to that of the one side body side surface portion is reversed by about 180° in the direction of the one side body side surface portion, and subsequently further reversed by about 180° in a direction opposite to that of the one side body side surface portion. While the air thus flows between the air introduction side panel member and the guide panel member while reversing a plurality of times, foreign matters mixed in the air collide with the peripheral surface between the two members and adhere to or drop onto the peripheral surface. The air from which the foreign matters have been removed in this way is introduced into the engine room through the air outlet of the guide panel member.

Prior Art Documents

Patent Document

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the dust collection mechanism described in Patent Document 1, since the air flow reverses approximately 180° multiple times between the air introduction side panel member and the guide panel member, the pressure loss of the air is large. This may reduce the flow rate of the air supplied to the cooler after passing through the dust collection mechanism, preventing sufficient cooling of the engine room.

[0006] An object of the present invention is to provide a dust collection mechanism for a construction machine capable of removing foreign substances contained in air while ensuring a sufficient flow rate of cooling air, and a construction machine equipped with the same.

Means for Solving the Problems

[0007] Provided is a dust collection mechanism provided in a construction machine, the construction machine including a cooler provided in a machine room having an air inlet, and a cooling fan that forms a forward air flow from the air inlet toward the cooler in the machine room. The dust collection mechanism forms a plurality of air passages that allow air to flow from the air inlet to the cooler, and includes a plurality of panel members each having a panel surface. The plurality of panel members are arranged in an arrangement direction intersecting the forward direction, and the plurality of air passages are respectively formed between the panel surfaces adjacent to each other in the arrangement direction. Each of the plurality of air passages has a shape in which the direction of the air flowing through the air passage includes a vector component in the forward direction at an arbitrary point. Each of the plurality of panel members includes a panel body including a turning portion that bends to change the direction of the air flowing through the air passage, and a space defining portion that defines a dust collection space for capturing foreign substances separated from the air at the turning portion between the panel body on the downstream side of the turning portion.

[0008] The dust collection mechanism can effectively remove foreign matters contained in the cooling air taken into the machine room through the air inlet while ensuring a sufficient flow rate of the cooling air. Specifically, some or all of the foreign matters contained in the air are separated from the air by utilizing the difference in inertia between the air and the foreign matters at the turning portion, and are captured in the dust collection space on the downstream side thereof. Moreover, since the dust collection space is formed in each of the plurality of air passages defined by the plurality of panel members, the foreign matters can be efficiently collected by these dust collection spaces. On the other hand, each of the plurality of air passages has a shape in which the direction of the air flowing through the air passage at any point includes a vector component in the forward direction. Therefore, compared with a conventional air passage in which air flows in the forward direction and the reverse direction, that is, a reverse-flow air passage, the pressure loss is small. This effectively suppresses a reduction in the flow rate of the air passing through the dust collection mechanism and reaching the cooler, thereby enabling the cooler to be supplied with air at a sufficient air volume.

[0009] Specifically, the panel body may include an upstream side portion that is located upstream of the turning portion in the forward direction and is inclined inward of the air passage with respect to the forward direction, or may include a downstream side portion that is located downstream of the turning portion in the forward direction and is inclined inward of the air passage with respect to the forward direction.

[0010] More specifically, the panel body includes an intermediate portion extending along the forward direction, an upstream side portion that is inclined inward of the air passage with respect to the forward direction upstream of the intermediate portion and forms the turning portion between the upstream side portion and the intermediate portion, and a downstream side portion that is inclined inward of the air passage with respect to the forward direction downstream of the intermediate portion. It is preferable that the space defining portion extends from the downstream side portion to the upstream side in the forward direction and covers a part of the intermediate portion and at least a part of the downstream side portion. The space defining portion can cooperate with the downstream side portion to efficiently capture the foreign matters separated from the air at the turning portion in the dust collection space.

[0011] In this case, it is preferable that the space defining part includes a downstream closing part connected to the downstream end of the downstream side part to close the downstream end of the dust collection space, a downstream covering part extending from the downstream closing part along the downstream side part to cover the entire area of the downstream side part, and an upstream covering part extending upstream from the downstream covering part along the intermediate part to cover a part of the intermediate part. Such a space defining part defines a dust collection space bent at a position corresponding to the boundary between the intermediate part and the downstream side part, thereby suppressing foreign matter captured on the downstream side of the dust collection space from flowing back and escaping from the dust collection space. This makes it possible to increase the dust collection efficiency.

[0012] In an embodiment where the panel body includes the intermediate part, the upstream side part, and the downstream side part, the space defining part includes an upstream edge part facing along the forward direction with the upstream side part, and it is preferable that the upstream edge part has a shape in which the width of the inlet opening formed between the upstream edge part and the upstream side part as viewed from the inside of the air passage changes depending on the position in the panel extension direction of the panel body. The panel extension direction is a direction orthogonal to each of the forward direction and the arrangement direction. The smaller the width of the inlet opening, the higher the flow velocity of the air flowing into the dust collection space through the inlet opening, and it becomes possible to capture foreign matter with a smaller diameter. Therefore, the change in the width of the inlet opening depending on the position in the panel extension direction expands the range of particle diameters of foreign matter that can be captured.

[0013] It is preferable that the plurality of panel members are arranged such that the panel surface is along the vertical direction. This enables foreign matter collected in the dust collection space to descend along the panel surface due to its own weight, thereby facilitating the discharge or recovery of the foreign matter.

[0014] In this case, each of the plurality of panel members preferably extends continuously from the upper end to the lower end of the plurality of panel members, and the dust collection mechanism further includes an upper closing member that contacts the upper ends of the plurality of panel members so as to close the upper ends of the respective plurality of dust collection spaces. By closing the upper ends of the respective plurality of dust collection spaces, the upper closing member can form a downward airflow in the dust collection space, thereby promoting the downward discharge of the foreign matter.

[0015] When the panel surface extends along the vertical direction, the dust collection mechanism further includes a storage portion for receiving and storing the foreign matter descending through the dust collection space, so that the foreign matter removed from the air can be efficiently collected in the storage portion.

[0016] The storage portion preferably has, for example, a storage container that defines a storage space opened upward toward the dust collection space. This enables the foreign matter that has descended in the dust collection space to be efficiently stored in the storage space.

[0017] The storage container is preferably movable between a storage position where the foreign matter descending through the dust collection space can enter the storage space and a recovery position outside the storage position where the foreign matter stored in the storage space can be recovered. This enables an operator to easily recover the foreign matter stored in the storage space at the recovery position at the storage position.

[0018] The storage portion may include a lower closing member that is movable between a closed position and an open position. The lower closing member closes the lower ends of the dust collection spaces respectively formed by the plurality of panel members at the closed position, so that foreign matter descending through the dust collection space can be deposited on the lower closing member. At the open position, the lower closing member opens each of the dust collection spaces, enabling the foreign matter to be discharged to the outside of the dust collection space. This makes it possible to discharge the deposited foreign matter to the outside by moving the closing member to the open position at an appropriate timing after depositing the foreign matter on the lower closing member while the lower closing member is in the closed position.

[0019] Preferably, the moving direction in which the lower closing member moves from the closed position to the open position is along the horizontal direction. This eliminates the need to secure a large space in the vertical direction to move the lower closing member.

[0020] Furthermore, preferably, the moving direction is parallel to the arrangement direction. This allows the lower closing member to sequentially open the dust collection spaces during the movement process, discharging the foreign matter little by little, thereby preventing a large amount of foreign matter from being discharged at once due to the movement of the lower closing member.

[0021] The storage portion further includes a biasing member. The biasing member preferably biases the lower closing member upward toward the lower ends of the plurality of panel members so that the lower closing member in the closed position remains in contact with the lower ends of the plurality of panel members. The biasing member can effectively suppress the leakage of the foreign matter deposited on the lower closing member between the closing member and the lower ends of the plurality of panel members.

[0022] The storage portion preferably further includes a locking portion, and the locking portion is switchable between a locked state that prevents the movement of the lower closing member from the closed position to the open position and an unlocked state that releases the prevention of the movement. The locking portion can prevent the lower closing member from inadvertently moving from the closed position to the open position and accidentally discharging the foreign matter.

[0023] When each of the space defining portions of the plurality of panel members has a downstream closing portion that closes a part of the air passage at the downstream end of the panel body in the forward direction, it is preferable that the downstream closing portion is provided with a confirmation window that enables the foreign matter stored on the lower closing member to be visually confirmed from the downstream side in the forward direction. The confirmation window enables the storage status of the foreign matter to be grasped regardless of the presence of the downstream closing portion.

[0024] The storage portion is preferably located below the lower end of the intake port. The storage portion arranged in this way can receive foreign matter without significantly affecting the intake performance through the intake port.

[0025] The dust collection mechanism preferably further includes a deflection angle adjustment mechanism that changes the deflection angle of the deflection portion of at least one panel member among the plurality of panel members. Changing the deflection angle can change the balance between the flow rate of the air supplied to the cooler and the amount of foreign matter collected in the dust collection space.

[0026] The dust collection mechanism may further include a spacing adjustment mechanism that changes the panel spacing, which is the spacing between adjacent panel members in the arrangement direction. Adjusting the panel spacing can also change the balance between the flow rate of the air supplied to the cooler and the amount of foreign matter collected in the dust collection space.

[0027] Also provided is a construction machine, which includes a cooler provided in a machine room having an air inlet, a cooling fan provided in the machine room to form a forward air flow from the air inlet toward the cooler, and a dust collecting mechanism for removing foreign matter contained in the air upstream of the cooler, the dust collecting mechanism being configured as described above.

[0028] The construction machine includes a machine room main body defining the machine room and a door opening communicating with the machine room, and a door movably connected to the machine room main body between a closed position for closing the door opening and an open position for opening the door opening. The air inlet is formed in the door, and the plurality of panel members are attached to the door so as to move integrally with the door. Preferably, the open position of the door is a position where the plurality of panel members are opened to the outside of the machine room. The plurality of panel members attached to the door in this way are opened to the outside when the door moves to the open position, thereby enabling an operator to easily perform maintenance and the like on the plurality of panel members.

Effects of the Invention

[0029] As described above, there is provided a dust collecting mechanism for a construction machine capable of removing foreign matter contained in the air while sufficiently ensuring the flow rate of cooling air, and a construction machine equipped with the same.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Embodiments for Carrying Out the Invention

[0031] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0032] FIG. 1 shows a construction machine 10 according to a first embodiment of the present invention. As shown in FIG. 1, the construction machine 10 is, for example, a hydraulic excavator, and includes a lower traveling body 11, an upper swing body 12, and an attachment 13. The lower traveling body 11 includes a pair of left and right crawlers and is capable of traveling on the ground. The upper swing body 12 is rotatably mounted on the lower traveling body 11. The upper swing body 12 includes an upper frame 20, a cab 14, a machine room cover 16, and a counterweight 22. The cab 14, the machine room 15, and the counterweight 22 are installed on the upper frame 20. The attachment 13 is connected to the front end of the upper frame 20 so as to be able to rise and fall, and performs a predetermined working operation, for example, an excavation operation. The cab 14 defines a driver's cab adjacent to the attachment 13. The counterweight 22 is mounted on the rear portion of the upper frame 20 and has a shape along the outer peripheral edge of the rear end of the upper frame 20.

[0033] The machine room cover 16 is installed at the rear portion of the upper swing body 12 and constitutes a machine room main body together with the counterweight 22. The machine room main body defines a machine room 15. The machine room cover 16 is arranged so as to cover the machine room 15 from above.

[0034] A partition wall 17 shown in FIG. 2 is arranged in the machine room 15. The partition wall 17 divides the machine room 15 into an engine room 15a and an intake chamber 15b. In the example shown in FIG. 2, the partition wall 17 extends in the front-rear direction of the upper swing body 12, and the engine room 15a and the intake chamber 15b are arranged side by side in the left-right direction of the upper swing body 12. The partition wall 17 has an opening, and the opening penetrates the partition wall 17, thereby allowing the cooling air taken into the intake chamber 15b to flow from the intake chamber 15b into the engine room 15a in the forward direction Dn through the opening. The forward direction Dn is the direction from the intake chamber 15b to the engine room 15a as indicated by an arrow in FIG. 2 in this embodiment, and is the left-right direction in the upper swing body 12 shown in FIG. 2.

[0035] The engine room 15a houses the engine 31, the hydraulic pump 32, the cooling fan 33, the fan shroud 34, and the cooler 35, which are arranged in the order of the cooler 35, the fan shroud 34, the cooling fan 33, the engine 31, and the hydraulic pump 32 from its upstream side along the forward direction Dn. An exhaust port 16a is formed in the machine room cover 16, and the exhaust port 16a is located at the downstream end of the forward direction Dn. The exhaust port 16a allows the air sent into the engine room 15a to be discharged to the outside of the engine room 15a through the exhaust port 16a.

[0036] The engine 31 is a power source for driving the hydraulic pump 32. The engine 31 has a drive shaft extending in the horizontal direction. The drive shaft has both ends, and the both ends respectively constitute an input end and an output end. The hydraulic pump 32 converts the power generated in the engine 31 into hydraulic pressure. Specifically, the hydraulic pump 32 is connected to the input end (the right end in FIG. 2) of the drive shaft of the engine 31 and is driven by the rotation of the drive shaft to discharge hydraulic oil.

[0037] The cooler 35 exchanges heat between the air passing through the cooler 35 and a refrigerant for cooling the engine 31, for example, engine cooling water, thereby cooling the refrigerant and thus the engine 31. The cooler 35 is constituted by a heat exchanger, for example, a radiator. The cooler 35 has a core surface, and the core surface is arranged to face the forward direction Dn.

[0038] The cooling fan 33 generates an air flow from the outside of the construction machine 10 through the intake chamber 15b toward the engine chamber 15a. Specifically, an air intake port 44, which will be described in detail later, is formed in the intake chamber 15b, and the cooling fan 33 forms an air flow in the forward direction Dn. The forward direction Dn is the direction from the air intake port 44 to the cooler 35, and the air passing through the cooler 35 reaches the engine 31. In the example shown in FIG. 2, the cooling fan 33 is located on the downstream side of the cooler 35 and on the upstream side of the engine 31. The cooling fan 33 is connected to the output end portion (the left end portion in FIG. 2) of the drive shaft of the engine 31 and is driven by the rotation of the drive shaft to generate an air flow in the forward direction Dn. The fan shroud 34 is arranged so as to surround the cooling fan 33 and guides the air that has passed through the cooler 35 to the engine 31.

[0039] The intake chamber 15b is located on the upstream side of the engine chamber 15a in the forward direction Dn. As shown in FIGS. 2 and 3, the intake chamber 15b is defined by a part of the machine room main body, specifically, a part of the machine room cover 16 and a part of the counterweight 22.

[0040] A door opening 40 shown in FIG. 3 is formed in the machine room main body, and an intake chamber door 41 is connected thereto. The intake chamber door 41 is a door for opening and closing the door opening 40. The door opening 40 is formed so as to communicate horizontally (in the left - right direction of the upper swing body 12 in this embodiment) between the inside and the outside of the intake chamber 15b. The intake chamber door 41 is connected to the machine room main body (machine room cover 16) via a vertical hinge 42 so as to be rotatable between the closed position shown in FIG. 2 and the open position shown in FIG. 3. The intake chamber door 41 closes the door opening 40 in the closed position and opens the door opening 40 in the open position. The intake chamber door 41 can reach the open position by rotating about a vertical axis from the closed position toward the outside of the intake chamber 15b.

[0041] The intake port 44 is formed in the intake chamber door 41 in this construction machine 10. The intake port 44 communicates the inside and the outside of the intake chamber 15b in a direction parallel to the forward direction Dn with the intake chamber door 41 in the closed position, thereby enabling the outside air, i.e., the ambient air, to be taken into the intake chamber 15b along the forward direction Dn through the intake port 44.

[0042] The intake chamber 15b houses the intake duct 36. The intake duct 36 surrounds the space on the upstream side of the cooler 35 in the forward direction Dn and guides the air taken into the intake chamber 15b to the cooler 35 in the forward direction Dn.

[0043] The construction machine 10 further includes a dust collection mechanism 50 shown in FIGS. 2 and 3. The dust collection mechanism 50 is disposed in the intake chamber 15b and captures and collects foreign matter 52 (FIG. 6) in the air on the upstream side of the cooler 35 while allowing the air taken into the intake chamber 15b through the intake port 44 to flow along the forward direction Dn. After the foreign matter 52 is collected in this way, the air is sent to the cooler 35 through the intake duct 36, thereby suppressing clogging in the cooler 35 and other devices.

[0044] In the embodiment shown in FIGS. 2 and 3, the dust collection mechanism 50 is attached to the intake chamber door 41 so as to move integrally with the intake chamber door 41. Therefore, the dust collection mechanism 50 is located in the intake chamber 15b as shown in FIG. 2 with the intake chamber door 41 in the closed position, at a position between the intake port 44 and the cooler 35, i.e., on the upstream side of the cooler 35, and can capture the foreign matter 52. On the other hand, when the intake chamber door 41 is in the open position, the dust collection mechanism 50 is opened to the outside of the intake chamber 15b as shown in FIG. 3. This facilitates the operator to perform maintenance on the dust collection mechanism 50.

[0045] As shown in FIGS. 4 and 5, the dust collection mechanism 50 includes a plurality of panel members 60, an upper closing member 80, and a storage portion 70.

[0046] The plurality of panel members 60 are arranged at intervals in the arrangement direction Da. The arrangement direction Da is a direction intersecting the forward direction Dn, and in this embodiment, it is a horizontal direction orthogonal to the forward direction Dn, that is, a direction parallel to the front-rear direction of the upper rotating body 12. The plurality of panel members 60 form a plurality of air passages 54, and each of the plurality of air passages 54 allows air to flow from the intake port 44 toward the intake duct 36 along the forward direction Dn. The plurality of air passages 54 are respectively formed between the panel members 60 adjacent to each other in the arrangement direction Da among the plurality of panel members 60.

[0047] Each of the plurality of panel members 60 has a panel body, and the panel body has panel surfaces 60a and 60b. The panel body is a plate material having a thickness direction parallel to the arrangement direction Da, and they have the same shape as each other. The panel surfaces 60a and 60b are both side surfaces in the thickness direction of the panel body, that is, the front and back surfaces. In this embodiment, each of the plurality of panel members 60 is arranged such that the panel surfaces 60a and 60b are respectively along the vertical direction, that is, in a vertical plane. Each of the plurality of air passages 54 is formed between the panel surface 60a of one of the panel members 60 adjacent to each other in the arrangement direction Da and the panel surface 60b of the other panel member 60.

[0048] Each of the panel bodies of the plurality of panel members 60 according to this first embodiment includes an upstream side portion 61, an intermediate portion 62, and a downstream side portion 63, which are arranged in order from the upstream side in the forward direction Dn and are continuous with each other. The intermediate portion 62 extends along the forward direction Dn, preferably parallel to the forward direction Dn. The upstream side portion 61 is located upstream of the intermediate portion 62 with respect to the forward direction Dn and is inclined by a first angle θ1 with respect to the forward direction Dn along the arrangement direction Da inside the air duct 54 (the lower side in FIG. 6). The downstream side portion 63 is inclined by a second angle θ2 with respect to the forward direction Dn along the arrangement direction Da inside the air duct 54 (that is, on the same side as the upstream side portion 61). Both the first and second angles θ1 and θ2 are acute angles (<90°). In other words, the angles formed between the intermediate portion 62 and the upstream side portion 61 and the downstream side portion 63 are all obtuse angles. Therefore, the direction in which air is guided in the air duct 54 includes a vector component in the forward direction Dn throughout the entire area of the air duct 54. In other words, the direction in which the air flows does not include a component that causes the air to flow backward in the direction opposite to the forward direction Dn.

[0049] Thus, between the intermediate portion 62 of the panel member 60 according to the first embodiment and the upstream side portion 61 and the downstream side portion 63 on both sides thereof, portions bent at the first and second angles θ1 and θ2 are respectively formed. And a turning portion 64 for dust collection is formed between the intermediate portion 62 and the upstream side portion 61. The turning portion 64 changes the flow of the air at the first angle θ1. However, since the foreign matter 52 contained in the air has greater inertia than the air, it collides with the downstream portion of the turning portion 64 (the intermediate portion 62 in this embodiment) without turning at the turning portion 64. Thereby, the foreign matter 52 can be separated from the air. Therefore, the upstream side portion 61 is a portion upstream of the turning portion 64 with respect to the forward direction Dn, and the downstream side portion 63 is included in a portion downstream of the turning portion 64 with respect to the forward direction Dn.

[0050] The turning angle in the turning portion 64, which is the first angle θ1 in this embodiment, can be arbitrarily set, but it is generally preferably set in the range of 30° to 60°. The turning angle may be different between the air passages.

[0051] Each of the plurality of panel members 60 further includes a space defining portion 66. The space defining portion 66 is plate-shaped like the main body of the panel member 60 (the upstream side portion 61, the intermediate portion 62, and the downstream side portion 63) and extends over the entire vertical direction, and is arranged to cover a specific portion of the panel main body on the downstream side of the turning portion 64. Thereby, the space defining portion 66 defines a dust collection space 68 between it and the specific portion, and captures the foreign matter 52 separated from the air by the turning portion 64 in the dust collection space 68.

[0052] The space defining portion 66 according to this embodiment has both ends in the forward direction Dn, that is, the downstream end portion and the upstream end portion on the opposite side thereof, and continuously extends along the forward direction Dn between the both ends. The downstream end portion is connected to an intermediate portion of the downstream side portion 63, thereby closing the downstream end of the dust collection space 68 and cutting off the path of the foreign matter 52 in the dust collection space 68. The upstream end portion is separated from the inside of the air passage 54 along the arrangement direction Da from the intermediate portion 62, thereby opening the dust collection space 68 to the upstream side and allowing the foreign matter 52 to enter the dust collection space 68.

[0053] The upper closing member 80 is arranged to contact the upper ends of the plurality of panel members 60 respectively, thereby closing the upper end of the dust collection space 68 defined by each of the plurality of panel members 60. This prevents the air that has entered the dust collection space 68 from escaping upward, thereby promoting the formation of a downward airflow in the dust collection space 68 and the downward discharge of the foreign matter 52. The upper closing member 80 is a horizontal flat plate in the example shown in FIG. 5, but the specific shape is not limited. The upper closing member 80 may be constituted by a part of the intake chamber door 41 or a part of the machine chamber main body (the intake chamber main body in this embodiment).

[0054] The storage portion 70 is a portion that stores the foreign matter 52 captured in the dust collection space 68 and descending in each of the plurality of air passages 54. As described above, since the panel surfaces 60a and 60b of each of the plurality of panel members 60 according to this embodiment are arranged along the vertical direction, the foreign matter 52 captured in the dust collection space 68 descends along the dust collection space 68 at least by its own weight (in this embodiment, together with the downward airflow formed by the upper closing member 80). The storage portion 70 is arranged to be located below each of the plurality of air passages 54 (that is, below each dust collection space 68), and can receive and store the foreign matter 52 descending as described above.

[0055] As shown in FIGS. 4 and 5, the storage portion 70 according to this embodiment includes a storage container 71 and a container lid 72. The storage container 71 defines a storage space 74 that opens upward and can receive the descending foreign matter 52 into the storage space 74. The container lid 72 is arranged to close the opening of the storage container 71. A plurality of openings 73 corresponding to each of the dust collection spaces 68 are formed in the container lid 72, and the foreign matter 52 is allowed to descend into the storage container 71 through the plurality of openings 73. The storage portion 70 is preferably arranged such that the upper surface of the container lid 72 contacts the lower end of each of the plurality of panel members 60.

[0056] The storage unit 70 according to this embodiment is attached to the intake chamber door 41 so as to be movable between a storage position and a recovery position. The storage position is a position below each of the plurality of air passages 54 and at which foreign matter 52 descending in the dust collection space 68 can enter the storage space 74. The recovery position is a position deviated from the storage position and at which an operator can recover the foreign matter stored in the storage space 74. In this embodiment, the recovery position is set at a position deviated from the storage position in the horizontal direction, specifically, in the arrangement direction Da, and the storage unit 70 is attached to the intake chamber door 41 so as to be movable, that is, slidable, in a direction parallel to the arrangement direction Da between the storage position and the recovery position.

[0057] The plurality of panel members 60 and the storage unit 70 are supported by the intake chamber door 41 via a frame body (not shown). The plurality of panel members 60 and the storage unit 70 may alternatively be directly supported by the intake chamber door 41 without passing through the frame body. For example, the plurality of panel members 60 may be directly joined to the inner surface of the intake chamber door 41, or the storage unit 70 may be slidably connected to the intake chamber door 41 via a predetermined guide mechanism. Further, when there is no intake chamber door 41, the plurality of panel members 60 and the storage unit 70 may be attached to the machine room main body (the intake chamber main body in this embodiment).

[0058] As shown in FIG. 5, the upper surface of the storage unit 70 (the upper surface of the container lid 72 in this embodiment) is located below the lower end of the intake port 44. That is, while the plurality of panel members 60 face the intake port 44 in a direction parallel to the forward direction Dn, the storage unit 70 is at a position deviated downward from the intake port 44. This makes it possible to ensure a large area through which air flows in the plurality of air passages 54 and suppresses the storage unit 70 from disturbing the air flow. That is, it is possible to store the foreign matter 52 without significantly affecting the intake performance through the intake port 44.

[0059] Next, the operation of the dust collecting mechanism 50 will be described.

[0060] As shown in FIG. 2, when the intake chamber door 41 is in the closed position and closes the door opening 40, the dust collecting mechanism 50 is located in the intake chamber 15b. When the cooling fan 33 is driven in this state, an air flow is formed that flows into the intake chamber 15b from the outside of the construction machine 10 through the intake port 44 of the intake chamber door 41. The air thus taken in can flow through the plurality of air passages 54 formed by the plurality of panel members 60 in the dust collecting mechanism 50 and the intake duct 36 in the forward direction Dn and pass through the cooler 35.

[0061] In the dust collecting mechanism 50, at each of the turning portions 64 of the plurality of panel members 60, while the direction of the air flowing through each of the plurality of air passages 54 is changed, the flow direction of the foreign matter 52 contained in the air cannot be completely changed, and the foreign matter 52 enters the dust collecting space 68 along the intermediate portion 62 on the downstream side of the turning portion 64 and is captured here. Since the upper end and the downstream end of the dust collecting space 68 are blocked by the upper closing member 80 and the downstream end of the space defining portion 68, respectively, the foreign matter 52 flowing into the dust collecting space 68 also descends together with a part of the air flowing into the dust collecting space 68 and is stored in the storage portion 70 disposed below each of the plurality of air passages 54. Specifically, the foreign matter 52 is received in the storage space 74 in the storage container 71 through the plurality of openings 73 formed in the container lid 72 of the storage portion 70.

[0062] In this way, the foreign matter 52 in the air is separated from the air by the turning portion 64 by utilizing its large inertia and is captured in the dust collecting space 68 defined on the downstream side of the turning portion 64. This effectively prevents clogging in the cooler 35 and other devices located on the downstream side of the dust collecting mechanism 50. Moreover, since the dust collecting space 68 is defined by each of the plurality of panel members 60, that is, given to each of the plurality of air passages 54, a sufficient capture amount can be ensured as a whole.

[0063] On the one hand, each of the plurality of air passages 54 has a shape in which the air flow direction at any position of the air passage 54 includes a vector component in the forward direction Dn, and the plurality of air passages 54 are arranged in the arrangement direction Da orthogonal to the forward direction Dn. Therefore, it is possible to secure a large overall air flow area and effectively suppress the air pressure loss in the dust collection mechanism 50. This makes it possible to capture the foreign matter 52 contained in the air upstream of the cooler 35 while avoiding poor cooling of the engine 31 due to insufficient air flow rate reaching the cooler 35.

[0064] Furthermore, in this embodiment, the foreign matter 52 captured in each of the dust collection spaces 68 as described above can be stored in a common storage portion 70, which enables the operator to easily collect the foreign matter 52. Specifically, the operator can easily collect the foreign matter 52 in the storage space 74 of the storage portion 70 at this collection position by moving the intake chamber door 41 from the closed position to the open position and moving the storage portion 70 from the previous storage position to the collection position. The effect of such a storage portion 70 can be similarly obtained when the dust collection mechanism 50 is attached to the intake chamber main body instead of the intake chamber door 41, for example, when the storage portion 70 is movably attached to the intake chamber main body between the storage position and the collection position.

[0065] The container lid 72 of the storage portion 70 is an optional element. That is, the container lid 72 may be omitted and the opening of the storage container 71 may always be open toward the plurality of air passages 54. On the other hand, the container lid 72 having the opening 73 corresponding to each of the dust collection spaces 68 as described above enables the foreign matter 52 captured in the dust collection space 68 to be stored in the storage space 74 while suppressing the disturbance of the air flow in the plurality of air passages 54.

[0066] Next, a second embodiment of the present invention will be described. FIGS. 7 to 12 show a dust collection mechanism 50A according to the second embodiment. The dust collection mechanism 50A is mounted on a construction machine 10 shown in FIG. 1 in the same manner as the dust collection mechanism 50 according to the first embodiment, and is common with the dust collection mechanism 50 in the following points. That is, the dust collection mechanism 50A includes a plurality of panel members 60A and a storage portion 90, and is attached to the inner surface of the intake chamber door 41 as shown in FIGS. 10 and 12 and rotates integrally with the intake chamber door 41. The plurality of panel members 60A are arranged in an arrangement direction Da at intervals of each other so as to form a plurality of air passages 54, and the arrangement direction Da is a horizontal direction orthogonal to the forward direction Dn. Each of the plurality of panel members 60A has a panel body and a space defining portion 66A. The panel body has a pair of front and back panel surfaces 60a and 60b, and the air passage 54 is formed between one panel surface 60a and the other panel surface 60b of the panel members 60A adjacent to each other in the arrangement direction Da. The panel body includes an upstream side portion 61, an intermediate portion 62, and a downstream side portion 63 similar to the upstream side portion 61, the intermediate portion 62, and the downstream side portion 63 according to the first embodiment, and a turning portion 64 for changing the air flow is formed between the intermediate portion 62 and the upstream side portion 64.

[0067] On the other hand, the dust collection mechanism 50A is different from the dust collection mechanism 50 in the following points.

[0068] In the first embodiment, the space defining portion 66 extends upstream from the intermediate portion of the downstream side portion 63 substantially parallel to the intermediate portion 62 to define a straight dust collection space 68, whereas the space defining portion 66A according to the second embodiment extends from the downstream end of the downstream side portion 63 and defines a dust collection space 68A that bends in the middle.

[0069] Specifically, the space defining portion 66A includes a downstream closing wall 66a, a downstream covering wall 66b, and an upstream covering wall 66c. The downstream closing wall 66a extends from the downstream end of the downstream portion 63 along the arrangement direction Da inside the air passage 54 (the right side in FIG. 7 and the left side in FIGS. 9 and 11), thereby closing the downstream end of the dust collection space 68A. The downstream covering wall 66b extends upstream (the front side in FIG. 7 and the left side in FIGS. 10 and 12) from the inner end of the downstream closing wall 66a substantially parallel to the downstream portion 63 (i.e., in a direction inclined with respect to the forward direction Dn), covering the downstream portion 63 from inside the air passage 54. The upstream covering wall 66c extends upstream (i.e., in a direction opposite to the forward direction Dn) from the upstream end of the downstream covering wall 66b substantially parallel to the intermediate portion 62 (i.e., in a direction substantially parallel to the forward direction Dn), covering the downstream portion of the intermediate portion 62. Accordingly, the space defining portion 66A defines a dust collection space 68A between a part of the intermediate portion 62 and the entire downstream portion 63 on the downstream side of the turning portion 64, and the dust collection space 68A has a bent shape at a position corresponding to the boundary portion between the intermediate portion 62 and the downstream portion 63. This prevents foreign matter 52 captured at the downstream end of the dust collection space 68A from flowing backward and escaping from the dust collection space 68A, thereby making it possible to increase the efficiency of capturing foreign matter 52.

[0070] The storage portion 90 includes a lower closing member 92, a slide support portion 94, and a lock portion 96, instead of the storage container 71 and the container lid 72 according to the first embodiment.

[0071] The lower closing member 92 is formed of, for example, a horizontal flat plate and has an area capable of contacting the lower end of each of the plurality of panel members 60A. By being arranged in such a contacting state, the lower closing member 92 can close the lower ends of the plurality of air passages 54 and the dust collection space 68, and can deposit foreign matter 52 descending in the dust collection space 68 on the lower closing member 92.

[0072] The slide support portion 94 supports the lower closing member 92 at a predetermined height position. The height position is a position where the upper surface of the lower closing member 92 contacts the lower end of each of the plurality of panel members 60A, and preferably, as shown in FIGS. 9 and 11, the upper surface is at a height position equal to or lower than the lower end of the air intake port 44 formed in the air intake chamber door 41.

[0073] While supporting the lower closing member 92 in this way, the slide support portion 94 further allows the lower closing member 92 to slide between a closed position and an open position. The closed position is a position where the lower closing member 92 closes the lower ends of all of the plurality of air passages 54, as shown in FIG. 9. Conversely, the open position is a position where the lower closing member 92 deviates from the open position in a horizontal sliding direction so as to open the lower ends of all of the plurality of air passages 54. The sliding direction is a direction parallel to the arrangement direction Da as shown in FIG. 11 in this embodiment.

[0074] Specifically, the slide support portion 94 includes a frame body 97 and a plurality of biasing members 98. The frame body 97 is fixed inside the intake chamber door 41 and supports the lower closing member 92 so as to be slidable in the sliding direction. Specifically, as shown in FIGS. 10 and 12, the frame body 97 integrally has a bottom wall 97a, a pair of side walls 97b, and a pair of restraining walls 97c. The bottom wall 97a extends in the arrangement direction Da below the plurality of panel members 60A, and supports the lower closing member 92 thereon via the plurality of biasing members 98. An outlet 97d penetrating the bottom wall 97a in the vertical direction is formed at the center of the bottom wall 97a in the width direction (the direction parallel to the forward direction Dn in this embodiment), and the descent of foreign matter 52 through the outlet 97d is allowed. The pair of side walls 97b rise from both edges of the bottom wall 97a in the width direction by a predetermined height dimension. The pair of restraining walls 97c extend inward in the width direction from the upper ends of the pair of side walls 97b to restrain the lower closing member 92 from above. The restraining region by the pair of restraining walls 97c is set in the regions on both outer sides of the plurality of panel members 60A in the width direction as shown in FIGS. 10 and 12.

[0075] The plurality of biasing members 98 are arranged at positions deviated from the outlet 97d, bias the lower closing member 92 upward, and maintain contact between the lower closing member 92 and the lower ends of the plurality of panel members 60A. Each of the plurality of biasing members 98 is constituted by a member that can be elastically deformed in the vertical direction, such as a leaf spring, and is interposed between the upper surface of the bottom wall 97a and the lower surface of the lower closing member 92 in a state of being compressed and deformed in the vertical direction, thereby using the elastic force of the biasing member 98 to bias the lower closing member 92 upward toward the lower ends of the panel members 60A.

[0076] The lock portion 96 can be switched between a locked state and an unlocked state. The locked state is a state in which the lock portion 96 blocks the movement of the lower closing member 92 from the closed position, and the unlocked state is a state in which the blocking of the movement is released. Specifically, the lock portion 96 according to this embodiment includes a constrained portion 96a and a constraint bolt 96b.

[0077] The constrained portion 96a extends upward from one end of the lower closing member 92 in the sliding direction (a direction parallel to the arrangement direction Da in this embodiment). Specifically, the end portion is the front end portion (the right end portion in FIGS. 9 and 11) of the lower closing member 92 in the direction from the closed position toward the open position. A bolt insertion hole that allows the insertion of the constraint bolt 96b is formed in the constrained portion 96a.

[0078] On the other hand, screw holes 60s are formed in a specific panel member 60A among the plurality of panel members 60A. The specific panel member 60A is a panel member 60A that can contact the constrained portion 96a in a state where the lower closing member 92 is in the closed position, and the screw holes 60s are formed at positions that coincide with the bolt insertion holes.

[0079] In this way, with the specific panel member 60A and the constrained portion 96a in contact with each other, the constraint bolt 96b is inserted into the bolt insertion hole from the outside and screwed into the screw hole 60s, whereby the lower closing member 92 is locked in the closed position (locked state). Conversely, when the constraint bolt 96b is removed from the screw hole 60s, the lock is released (the unlocked state).

[0080] On the one hand, each of the plurality of panel members 60A further includes an upstream closing wall 67. The upstream closing wall 67 is arranged so as to block only the lower end portion of the upstream opening formed between the panel surface 60a and the space defining portion 66A in each of the plurality of panel members 60A. The upstream closing wall 67 arranged in this way suppresses the foreign matter 52 deposited on the upper side of the lower closing member 92 in the dust collection space 68 from leaking upstream and promotes the storage of the foreign matter 52.

[0081] In addition, a confirmation window 65 shown in FIGS. 9 and 11 is formed at the lower end of the downstream closing wall 66a in each of the plurality of panel members 60A. The confirmation window 65 enables an operator to grasp the degree of deposition of the foreign matter 52 through the confirmation window 65 from a position in front of the downstream closing wall 66a with the intake chamber door 41 open. Therefore, it is preferable that the confirmation window 65 is covered with a sheet material made of a material having relatively high transparency.

[0082] Next, the operation of the dust collection mechanism 50A according to the second embodiment will be described.

[0083] During the operation of the construction machine (for example, the construction machine 10 shown in FIG. 1) on which the dust collection mechanism 50A is mounted, the lower closing member 92 of the storage portion 90 is set at the closing position, and the openings at the lower ends of the plurality of air passages 54 and the dust collection space 68 are blocked. At this time, the locking portion 96 is switched to the locked state to lock the lower closing member 92 at the closing position, thereby preventing the lower closing member 92 from being inadvertently displaced from the closing position toward the open position due to vibrations of the construction machine 10 or the like.

[0084] In this state, air is allowed to smoothly flow into the intake chamber 15b from the intake port 44 of the intake chamber door 41 through the plurality of air passages 54, in the same manner as in the first embodiment. Foreign matter 52 contained in the air is separated from the air by the turning portion 64, in the same manner as in the first embodiment, and is captured in the dust collection space 68A on the downstream side thereof. The foreign matter 52 descends in the dust collection space 68A and accumulates on the lower closing member 92. Here, the plurality of biasing members 98 bias the lower closing member 92 upward to maintain contact between the lower closing member 92 and the lower ends of the plurality of panel members 60A, thereby suppressing the leakage of foreign matter 52 from the gap between the lower closing member 92 and the lower ends of the plurality of panel members 60A. Further, the upstream closing wall 67 prevents the foreign matter 52 deposited on the lower closing member 92 from escaping from the dust collection space 68A.

[0085] An operator can, for example, periodically open the intake chamber door 41 to check the deposition state of the foreign matter 52 in the dust collection space 68 through the inspection window 65. Then, with the foreign matter 52 having accumulated to a certain extent, the lock portion 96 is switched to the unlocked state (in this embodiment, the restraining bolt 96b is removed), and the lower closing member 92 is slid from the closed position to the open position, thereby discharging downward the foreign matter 52 that has been deposited on the lower closing member 92 until then. The foreign matter 52 may be dropped directly onto the ground, or may be received and collected by a suitable cleaning tool 100 as shown in FIG. 11, for example.

[0086] The sliding direction can be arbitrarily set, but is preferably a direction parallel to the arrangement direction Da as shown in FIGS. 9 and 11. This enables the dust collection space 68 to be opened one by one in order as the lower closing member 92 slides from the closed position to the open position. Thereby, the foreign matter 52 can be efficiently discharged or collected in order while avoiding the discharge of a large amount of foreign matter 52 at one time.

[0087] By using the lower end portion of each of the plurality of air passages 54 as a storage space, the storage portion 90 has a simple and lightweight structure that does not require, for example, the storage container 71 according to the first embodiment, and can store and collect foreign matter 52. Therefore, even when the storage portion 90 is attached to the intake chamber door 41, dust collection can be performed while preventing a significant increase in the total weight (weight including the dust collection mechanism) of the intake chamber door 41.

[0088] The present invention is not limited to the embodiments described above. The present invention includes, for example, the following aspects.

[0089] (A) Regarding the panel members The specific shape of each of the plurality of panel members is not limited.

[0090] The turning portion only needs to change the air flow direction to such an extent that foreign matter can be captured, and is not limited to, for example, a portion where the panel member bends steeply like the turning portion 64. The turning portion may be, for example, a curved shape in which the tangential direction continuously changes.

[0091] The arrangement direction only needs to be a direction intersecting the forward direction, and is not limited to the horizontal direction orthogonal to the forward direction. The arrangement direction may be, for example, the horizontal direction. That is, the plurality of panel members may be arranged at intervals in the vertical direction, that is, in a posture where the panel surface is substantially horizontal. However, the horizontal arrangement of the plurality of panel members in a posture where the panel surface is along the vertical direction enables the foreign matter captured in each dust collection space to descend at least by its own weight and be easily discharged or collected.

[0092] The space defining part only needs to be able to define a dust collection space between itself and the panel body, and its shape can be freely set. For example, the size of the opening width WO of the inlet opening 69 shown in FIG. 13 does not matter. The inlet opening 69 is an opening (the inlet of the dust collection space 68) formed between the upstream edge 66e of the space defining part 66 and the virtual inlet line 66f when the panel surface 60a of the panel body and the space defining part 66 are viewed along the arrangement direction Da from the inside of the air passage 54. The opening width WO is the dimension along the forward direction Dn of the inlet opening 69, and the virtual inlet line 66f is a straight line obtained by projecting the upstream edge 66e in the direction opposite to the forward direction Dn (i.e., toward the upstream side) onto the upstream side part 61. The smaller the opening width WO, the higher the speed of the air flowing into the dust collection space 68, and it becomes possible to capture foreign objects 52 with a smaller diameter.

[0093] Therefore, by setting the shape of the upstream edge 66e so that the opening width WO changes depending on the position in the panel extension direction, it is possible to expand the range of the diameters of the foreign objects 52 that can be captured in the dust collection space 68. Here, the panel extension direction is a direction perpendicular to the forward direction Dn and the arrangement direction Da respectively, and in the first embodiment, it is the vertical direction. For example, as shown in FIG. 14, by inclining the linear upstream edge 66e with respect to the vertical direction so that the opening width WO linearly changes from the minimum width WOmin to the maximum width WOmax, or by forming the upstream edge 66e in a curved or polygonal line shape, it is possible to change the opening width WO depending on the position in the vertical direction.

[0094] Also, as shown by the dashed double-dotted line in FIG. 13, if the space defining part 66 is arranged so that it can tilt in a direction parallel to the forward direction Dn, it is also possible to change the degree of change of the opening width WO depending on the tilt angle. This effect is the same for the panel member 60A according to the second embodiment.

[0095] The turning angle (the first angle θ1 in the first embodiment) may be variable. For example, as shown in FIG. 15, in each (or a part) of the plurality of panel members 60, the intermediate portion 62 and the upstream side portion 61 are connected via a hinge 102 so as to be rotatable about a vertical axis, and the turning angle may be changed by the rotation. Enabling the turning angle to be changed makes it possible to change the balance between the flow rate of the air supplied to the cooler 35 and the amount of foreign matter collected in the dust collection space 68. Specifically, if the turning angle is reduced, the pressure loss in each air passage 54 can be suppressed and the flow rate of the air supplied to the cooler 35 can be increased. On the other hand, if the turning angle is increased, the separation performance of the foreign matter 52 in the turning portion 64 can be enhanced and the recovery amount of the foreign matter 52 can be increased.

[0096] Furthermore, the dust collection mechanism according to the present invention may include a turning angle adjustment mechanism for actively changing the turning angle. FIG. 15 shows an example of the turning angle adjustment mechanism 110. The turning angle adjustment mechanism 110 changes the turning angle in each turning portion 64 by moving each of the upstream side portions 61 of the plurality of panel members 60 in a direction parallel to the arrangement direction Da. Specifically, the turning angle adjustment mechanism 110 includes a connecting member 112 and a driving device 114. The connecting member 112 is rotatable about a vertical axis via a joint portion 118 at each upstream end of the upstream side portion 61 and is connected so as to be relatively displaceable in a direction along the upstream side portion 61 within a limited range. The driving device 114 is constituted by, for example, a cylinder device having a rod 116 that can expand and contract in the arrangement direction Da, and the connecting member 112 is connected to an end of the rod 116. The driving device 114 can change the turning angle by moving the connecting member 112 along the arrangement direction Da and rotating each of the upstream side portions 61 connected to each of the connecting members 112 with respect to the intermediate portion 62.

[0097] The dust collection mechanism according to the present invention may further include a spacing adjustment mechanism that changes the panel spacing, which is the spacing between panel members adjacent to each other in the arrangement direction. By adjusting the panel spacing, it is also possible to change the balance between the flow rate of air supplied to the cooler and the amount of foreign matter collected in the dust collection space. Such adjustment of the panel spacing can be realized, for example, by a combination of arranging the plurality of panel members slidably in the arrangement direction and a drive mechanism that moves each of the plurality of panel members at different speeds.

[0098] (B) Regarding the storage part The storage part can be omitted as appropriate. For example, the storage parts 70 and 90 may be omitted in the first or second embodiment. That is, the foreign matter descending into the dust collection space may be discharged directly onto the ground. Also, the storage container 71 or the lower closing member 92 may be fixed immovably.

[0099] (C) Regarding other elements constituting the construction machine The specific arrangement of other elements in the construction machine on which the dust collection mechanism according to the present invention is mounted is not limited. For example, the position of the cooling fan is not limited to the positions in the first and second embodiments. The cooling fan may be located upstream of the cooler along the forward direction.

Explanation of reference numerals

[0100] 10 Construction machine 15 Machinery room 16 Machinery room cover (machinery room main body) 22 Counterweight (machinery room main body) 33 Cooling fan 35 Cooler 40 Door opening 41 Intake chamber door 44 Intake port 50, 50A Dust collection mechanism 52 Foreign matter 54 Air duct 60, 60A Panel member Panels 60a and 60b Upstream side portion 61 Middle portion 62 Downstream side portion 63 Deflection portion 64 Inspection window 65 Space defining portions 66 and 66A Downstream side closing wall (closing portion) 66a Downstream side covering portion 66b Upstream side covering portion 66c Dust collection spaces 68 and 68A Reservoirs 70 and 90 Reservoir container 71 Reservoir space 74 Upper side closing member 80 Lower side closing member 92 Slide support portion 94 Lock portion 96 Biasing member 98 Deflection angle adjustment mechanism 110

Claims

1. A dust collecting mechanism provided in a construction machine having a cooler provided in a machine room with an air inlet, and a cooling fan that forms a forward air flow from the air inlet toward the cooler in the machine room, the dust collecting mechanism being provided upstream of the cooler to remove foreign matter in the air, forming a plurality of air passages that allow air to flow from the air inlet to the cooler, and including a plurality of panel members each having a panel surface, the plurality of panel members are arranged in an array direction intersecting the forward direction, and the plurality of air passages are respectively formed between the panel surfaces adjacent to each other in the array direction, and each of the plurality of air passages has a shape in which the direction of air flowing through the air passage includes a vector component in the forward direction at an arbitrary point, each of the plurality of panel members includes a panel body including a turning portion that bends to change the direction of air flowing through the air passage, and a space defining portion that defines a dust collecting space for capturing foreign matter separated from the air at the turning portion between the panel body on the downstream side of the turning portion, the panel body includes an intermediate portion extending along the forward direction, an upstream side portion that inclines inward of the air passage with respect to the forward direction upstream of the intermediate portion and forms the turning portion between the upstream side portion and the intermediate portion, and a downstream side portion that inclines inward of the air passage with respect to the forward direction downstream of the intermediate portion, and the space defining portion extends from the downstream side portion to the upstream side in the forward direction and covers a part of the intermediate portion and at least a part of the downstream side portion, a dust collecting mechanism of a construction machine.

2. The dust collecting mechanism of a construction machine according to claim 1, wherein the space defining portion has a downstream end portion that closes the downstream side of the dust collecting space by connecting to the panel body, and an upstream end portion that is separated from the panel body inside the air passage and opens the dust collecting space to the upstream side, a dust collecting mechanism of a construction machine.

3. The dust collecting mechanism of a construction machine according to claim 1 or 2, wherein the space defining portion includes a downstream side closing portion that connects to the downstream end of the downstream side portion and closes the downstream end of the dust collecting space, a downstream side covering portion that extends along the downstream side portion from the downstream side closing portion and covers the entire area of the downstream side portion, and an upstream side covering portion that extends upstream along the intermediate portion from the downstream side covering portion and covers a part of the intermediate portion, a dust collecting mechanism of a construction machine.

4. A dust collection mechanism for a construction machine according to any one of claims 1 to 3, wherein the space defining portion includes an upstream edge portion that faces the upstream side portion along the forward direction, and the upstream edge portion has a shape in which the opening width of an inlet opening formed between the upstream edge portion and the upstream side portion as viewed from the inside of the air passage changes depending on the position in the panel extension direction of the panel body. A dust collection mechanism for a construction machine.

5. A dust collection mechanism for a construction machine according to any one of claims 1 to 4, wherein the plurality of panel members are arranged such that the panel surfaces are along the vertical direction. A dust collection mechanism for a construction machine.

6. A dust collection mechanism for a construction machine according to claim 5, wherein each of the plurality of panel members continuously extends from the upper end to the lower end of the plurality of panel members, and the dust collection mechanism further includes an upper closing member that contacts the upper ends of the plurality of panel members so as to close the upper ends of the respective dust collection spaces. A dust collection mechanism for a construction machine.

7. A dust collection mechanism for a construction machine according to claim 5 or 6, further comprising a storage portion that receives and stores foreign matter descending through the dust collection space. A dust collection mechanism for a construction machine.

8. A dust collection mechanism for a construction machine according to claim 7, wherein the storage portion has a storage container, and the storage container defines a storage space that is open upward toward the dust collection space. A dust collection mechanism for a construction machine.

9. A dust collection mechanism for a construction machine according to claim 8, wherein the storage container is movable between a storage position where foreign matter descending through the dust collection space can enter the storage space and a recovery position outside the storage position where the foreign matter stored in the storage space can be recovered. A dust collection mechanism for a construction machine.

10. A dust collection mechanism for a construction machine according to claim 7, wherein the storage portion includes a lower closing member that is movable between a closed position and an open position, and the lower closing member collectively closes the lower ends of the dust collection spaces respectively formed by the plurality of panel members in the closed position and opens each of the dust collection spaces in the open position. A dust collection mechanism for a construction machine.

11. A dust collection mechanism for a construction machine according to claim 10, wherein the moving direction in which the lower closing member moves from the closed position to the open position is a direction along the horizontal direction. A dust collection mechanism for a construction machine.

12. A dust collecting mechanism for a construction machine according to claim 11, wherein the moving direction is a direction parallel to the arrangement direction, the dust collecting mechanism for a construction machine.

13. A dust collecting mechanism for a construction machine according to any one of claims 10 to 12, wherein the storage part further includes a biasing member, and the biasing member causes the lower closing member in the closed position to contact the lower ends of the plurality of panel members. A dust collecting mechanism for a construction machine that biases the lower closing member upward toward the lower ends of the plurality of panel members so as to maintain the state.

14. A dust collecting mechanism for a construction machine according to any one of claims 10 to 13, wherein the storage part further includes a locking part, and the locking part moves the lower closing member from the closed position to the open position. A dust collecting mechanism for a construction machine that can be switched between a locked state that blocks movement and an unlocked state that releases the blockage of the movement.

15. A dust collecting mechanism for a construction machine according to any one of claims 10 to 14, wherein each of the space defining parts of the plurality of panel members is a downstream closing part that closes a part of the air passage at the downstream end of the panel body in the forward direction. A confirmation window is provided in the downstream closing part to enable visual confirmation of the foreign matter stored on the lower closing member from the downstream side in the forward direction. A dust collecting mechanism for a construction machine.

16. A dust collecting mechanism for a construction machine according to any one of claims 1 to 15, wherein the storage part is located below the lower end of the intake port, the dust collecting mechanism for a construction machine.

17. A dust collecting mechanism for a construction machine according to any one of claims 1 to 16, wherein a turning angle adjusting mechanism for changing the turning angle of the turning part of at least one panel member among the plurality of panel members is further provided. A dust collecting mechanism for a construction machine.

18. A construction machine, A cooler provided in a machine room having an intake port, A cooling fan provided in the machine room to form a forward air flow from the intake port toward the cooler, A dust collecting mechanism for removing foreign matter contained in air upstream of the cooler, the dust collecting mechanism for a construction machine according to any one of claims 1 to 17, a construction machine comprising.

19. A construction machine according to claim 18, comprising: a machine room main body that defines the machine room and a door opening leading to the machine room; and a door movably connected to the machine room main body between a closed position for closing the door opening and an open position for opening the door opening, wherein the intake port is formed in the door, the plurality of panel members are attached to the door so as to move integrally with the door, and the open position of the door is a position where the plurality of panel members are opened to the outside of the machine room.

Images