JP2016061034A - Dustproof device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dustproof device capable of making a filter vibrate without requiring the use of a power source other than a driving source of a fan, and suppressing dust shook off from the filter from re-adhering to the filter.SOLUTION: A dustproof device 1 includes a power accumulation mechanism 50 and a vibration mechanism 70. The power accumulation mechanism 50 is connected to a fan 13 and a driving source 11, and the vibration mechanism 70 is connected to the power accumulation mechanism 50 and makes a filter 17 vibrate. The power accumulation mechanism 50 accumulates power transmitted thereto from the driving source 11 while the fan 13 is driven, and discharges power accumulated therein to the vibration mechanism 70 while the fan 13 is stopped.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dustproof device for a construction machine.

  For example, Patent Document 1 (FIGS. 1 to 3 and the like) and Patent Document 2 describe conventional dustproof devices for construction machines. Paragraphs [0005] to [0009] of Patent Document 1 include the following description. “By the rotation of the fan (6), the outside air is sucked from the suction port (Gully) (8) and passes through the radiator (4) and the oil cooler (5) as cooling air. In this case, in the cooling air To prevent the radiator (4) and oil cooler (5) from being clogged by the contained dust, a dustproof device (9) is provided opposite to the suction air flow. In the dustproof device (9), in order to prevent the dustproof body from being clogged, it is necessary to periodically remove the attached dust. In addition, the code | symbol described in patent document 1 was attached | subjected the parenthesis (the same also about patent document 2).

  [Prior Art 1] [Solution] in [Summary] of Patent Document 1 includes the following description. “The metal mesh (13) constituting the dustproof device (11) is swung by the hydraulic cylinder (16) to remove dust adhering to the metal mesh (13)”.

  [Prior Art 2] [Solution] in [Summary] of Patent Document 2 includes the following description. “In the cleaning device for removing the dust adhering to the dustproof net (15), the motor (25) for vibrating the dustproof net (15) and the vibration device (24) including the eccentric cam (26) are provided. It's a configuration. "

JP 2004-225624 A JP 2013-2339 A

  In the above [Prior Art 1] and [Prior Art 2], the filter is vibrated using hydraulic power or electric power, so that equipment for using these powers is required, and the configuration of the dustproof device is complicated. There is a risk of becoming. The details of this problem are as follows. In the above [Prior Art 1], the hydraulic cylinder (16) swings the wire mesh (13) (filter). Although details of the hydraulic cylinder (16) are not described in Patent Document 1, normally, in order to operate the hydraulic cylinder, devices such as a hydraulic pressure generator and hydraulic piping are required. In [Prior Art 2], the eccentric cam (26) vibrates the dust-proof net (15) (filter) using the power of the motor (25). Therefore, in order to operate the motor (25), devices for using electric power (such as a generator or a storage battery and electric wiring) are necessary. Therefore, the configuration of the dustproof device may be complicated.

  Here, in the technique described in Patent Document 1, the fan (6) is disposed in the vicinity of the dustproof device (9) (filter). Therefore, it is conceivable to vibrate the filter using the power of the fan. However, if the drive of the fan and the vibration of the filter are performed simultaneously, the dust that has been shaken off from the filter may be re-adsorbed to the filter by the airflow generated by the drive of the fan.

  Therefore, the present invention provides a dustproof device for a construction machine that can vibrate a filter without using a power source other than a drive source of a fan and can suppress re-adsorption of dust that has been shaken off from the filter to the filter. Objective.

  A dustproof device for a construction machine according to the present invention includes a drive source, a fan that is driven by power transmitted from the drive source, and a filter through which an airflow generated by the drive of the fan passes. Furthermore, the dustproof device includes a power storage mechanism connected to the fan and the drive source, and a vibration mechanism connected to the power storage mechanism to vibrate the filter. The power storage mechanism stores power transmitted from the drive source to the power storage mechanism when the fan is driven. The power storage mechanism releases the power stored in the power storage mechanism to the vibration mechanism when the fan is stopped.

  With the above configuration, the filter can be vibrated without using a power source other than the drive source of the fan, and re-adsorption to the filter of dust that has been shaken off from the filter can be suppressed.

It is a figure which shows the dustproof apparatus 1 in the machine room of a construction machine. It is a figure equivalent to FIG. 1, and is a figure which shows the dustproof apparatus 101 of 2nd Embodiment.

  With reference to FIG. 1, the dustproof apparatus 1 (dustproof apparatus of a construction machine) of 1st Embodiment is demonstrated.

  The dustproof device 1 is provided (stored) in a machine room (for example, in an engine room) of a construction machine. The dustproof device 1 is a device that prevents dust (dust, dust, dust, dust, etc.) from entering the machine room from the outside of the machine room. The construction machine provided with the dustproof device 1 is, for example, an excavator, for example, a hydraulic excavator. The dustproof device 1 includes a cooling structure (11-17) and a power storage transmission mechanism (20-73).

  The cooling structures (11 to 17) are structures for cooling the heat exchanger 15 by the fan 13. The cooling structure (11 to 17) includes a drive source 11, a fan 13, a heat exchanger 15, and a filter 17.

  The drive source 11 is a drive source (power source) of the fan 13. The drive source 11 is also a drive source of a hydraulic pump for operating the construction machine. The drive source 11 may not be a drive source of the hydraulic pump. The drive source 11 is an engine that generates power by burning fuel. The drive source 11 may be an electric motor that generates power by electromagnetic force (the fan 13 may be an electric fan). The drive source 11 includes an output shaft 12.

  The output shaft 12 is a shaft (mandrel) to which power generated by the drive source 11 is output. When the drive source 11 is an engine, the output shaft 12 is a crankshaft. The output shaft 12 rotates around the central axis of the output shaft 12 (the central axis of the mandrel). Hereinafter, the rotation around the central axis of the mandrel is simply referred to as “rotation” (the same applies to the fan shaft 14, the rotation shaft 40, and the excitation shaft 71 described later).

  The fan 13 is a device that generates an airflow C (cooling air). The fan 13 generates the airflow C as the wings rotate. The direction of the central axis of rotation of the blades of the fan 13 is defined as an airflow direction X. The airflow direction X is an axial direction of the fan shaft 14 to be described later, and is a flow direction of the airflow C at a position where the blade portion of the fan 13 is disposed. The upstream side of the airflow C is the upstream side X1, and the downstream side of the airflow C is the downstream side X2. The fan 13 generates the airflow C so that the airflow C flows from the outside of the machine room into the machine room. The fan 13 is driven by the rotational power transmitted from the drive source 11. Hereinafter, the rotational power is also referred to as “power”. When the fan 13 generates the airflow C so that the airflow C passes (passes) through the filter 17, it is referred to as “when the fan 13 is driven”. The fan 13 is interlocked with (moves around) the output shaft 12. The fan 13 is arranged on the upstream side X1 from the drive source 11. The fan 13 includes a fan shaft 14.

  The fan shaft 14 is a shaft (mandrel) provided at the rotation center of the wing portion of the fan 13. The axial direction of the fan shaft 14 is, for example, the airflow direction X. The point that the axial direction is, for example, the airflow direction X is the same for the output shaft 12, the rotating shaft 40 described later, and the exciting shaft 71 described later.

  The heat exchanger 15 (cooler, radiator) is a device that cools the fluid. The heat exchanger 15 cools the coolant of the drive source 11, for example. Further, for example, the heat exchanger 15 cools hydraulic oil for a hydraulic actuator (not shown) included in the construction machine. The heat exchanger 15 is disposed on the upstream side X1 from the fan 13. The airflow C passes through the heat exchanger 15. In FIG. 1, only a part of the heat exchanger 15 is shown.

  The filter 17 is a device that removes (scraps) dust from the airflow C. The airflow C passes through the filter 17. In particular, when the construction machine including the dustproof device 1 is used in a place where dust is likely to be generated, such as a demolition site, dust is likely to accumulate in the filter 17. If dust accumulates in the filter 17, the flow rate of the airflow C passing through the heat exchanger 15 is reduced, and there is a possibility that cooling in the heat exchanger 15 cannot be performed appropriately. Therefore, the dust collected in the filter 17 needs to be removed (cleaned) (the filter 17 needs to be maintained). Therefore, the filter 17 is configured to vibrate when vibrated by a vibration mechanism 70 described later. The filter 17 is configured to be swingable by, for example, a hinge (not shown). The filter 17 includes, for example, a mesh portion through which the airflow C passes and a frame portion that supports the mesh portion. The filter 17 is disposed on the upstream side X1 from the fan 13. In addition, arrangement | positioning of the component of a cooling structure (11-17) may not be said arrangement | positioning. In the above example, the filter 17, the heat exchanger 15, the fan 13, and the drive source 11 are arranged in this order from the upstream side X1 toward the downstream side X2. For example, the heat exchanger 15 may be disposed on the downstream side X2 from the fan 13. For example, you may arrange | position in order of the drive source 11, the fan 13, the filter 17, and the heat exchanger 15 toward the downstream X2 from the upstream X1 (not shown).

  The power accumulation transmission mechanism (20 to 73) is a mechanism for using the power of the drive source 11 to drive the vibration mechanism 70. The power accumulation and transmission mechanism (20 to 73) is disposed at the lower part of the machine body of the construction machine (lower part of the machine room). The power storage transmission mechanism (20 to 73) is disposed, for example, below the cooling structure (11 to 17) or below the cooling structure (11 to 17). The power accumulation transmission mechanism (20 to 73) includes the drive source power transmission mechanism 20, the first power transmission mechanism 30, the rotating shaft 40, the power accumulation mechanism 50, the second power transmission mechanism 60, and the vibration mechanism 70. And comprising.

  The drive source power transmission mechanism 20 transmits power between the drive source 11 and the fan 13. The drive source power transmission mechanism 20 transmits power between the output shaft 12 and the fan shaft 14. The drive source power transmission mechanism 20 interlocks the output shaft 12 and the fan shaft 14 (rotates the fan shaft 14 as the output shaft 12 rotates). The drive source power transmission mechanism 20 is a power transmission mechanism using a belt. The drive source power transmission mechanism 20 may be a power transmission mechanism using, for example, a gear or a chain. The drive source power transmission mechanism 20 includes a fan belt 21 and a fan pulley 22.

  The fan belt 21 is attached to the output shaft 12 and interlocks with the output shaft 12. The fan belt 21 is, for example, a V belt. For example, the same applies to the first belt 31 and the second belt 61, which will be described later, in that they are V belts or the like.

  A fan belt 21 is attached to the fan pulley 22. The fan pulley 22 is interlocked with the fan belt 21. The fan pulley 22 is fixed to the fan shaft 14.

  The first power transmission mechanism 30 transmits the power of the drive source 11 to the rotary shaft 40 only when the fan 13 is driven. The first power transmission mechanism 30 does not transmit power between the rotation shaft 40 and the fan shaft 14 (between the rotation shaft 40 and the drive source 11) when the rotation shaft 40 rotates in the reverse direction (described later). The first power transmission mechanism 30 is connected to the rotary shaft 40. The first power transmission mechanism 30 is connected to the drive source 11. The first power transmission mechanism 30 is connected to the output shaft 12 via the fan shaft 14. The first power transmission mechanism 30 may be directly connected to the output shaft 12 (to the drive source 11) without the fan shaft 14 (not shown). The first power transmission mechanism 30 is a power transmission mechanism using a belt (the same applies to the second power transmission mechanism 60). The first power transmission mechanism 30 may be a power transmission mechanism using, for example, a gear or a chain (the same applies to the second power transmission mechanism 60). The first power transmission mechanism 30 includes a first belt 31 and a first clutch 32.

  The first belt 31 transmits power between the fan shaft 14 and the first clutch 32. The first belt 31 is attached to the fan shaft 14 and interlocks with the fan shaft 14. The first belt 31 is interlocked with the bidirectional rotation of the fan shaft 14 (so-called bidirectional power transmission mechanism).

  The first clutch 32 switches the presence or absence of power transmission between the first belt 31 and the rotating shaft 40 (between the fan shaft 14 and the rotating shaft 40). A first belt 31 is attached to the first clutch 32. The first clutch 32 is attached to the rotating shaft 40. The first clutch 32 may be attached to the fan shaft 14 (or the output shaft 12), and the first belt 31 may be attached to the rotating shaft 40 (not shown). The first clutch 32 is, for example, a one-way clutch.

  The first clutch 32 transmits power between the first belt 31 and the rotating shaft 40 only when a predetermined condition is satisfied. The first clutch 32 performs the above-described power transmission in the following [Power transmission condition A]. The first clutch 32 does not transmit the power described above, for example, in any of the following [Condition B-1 for not transmitting power] and [Condition B-2 for not transmitting power]. [Condition A for transmitting power] When the first belt 31 is operating in one direction (the rotation direction of the first belt 31 when the fan 13 is driven). At this time, the rotating shaft 40 rotates forward (described later). [Condition B-1 for not transmitting power] When the rotating shaft 40 is rotating in the reverse direction (described later). [Condition B-2 for not transmitting power] When the first belt 31 is stopped. The “stop” is a stop for the machine room (the same applies to the following “stop”). Even when the first belt 31 is operating in the other direction (the direction opposite to the “one direction”), the first clutch 32 does not transmit the power.

  The rotating shaft 40 is connected to the first power transmission mechanism 30. The rotating shaft 40 is a shaft (mandrel) that is rotatably supported (held) by the rotating shaft bearing 41. The rotating shaft 40 can rotate forward and backward. The reverse rotation is a rotation opposite to the normal rotation direction.

  The rotary shaft bearing 41 supports the rotary shaft 40. For example, two rotation shaft bearings 41 may be provided, and only one rotation shaft bearing 41 may be provided, or three or more rotation shaft bearings 41 may be provided (the same applies to excitation shaft bearings 72 described later).

  The power storage mechanism 50 stores power transmitted from the drive source 11. The power storage mechanism 50 is connected to the rotating shaft 40. The power storage mechanism 50 is connected to the fan 13 and the drive source 11. The power storage mechanism 50 is connected to the fan shaft 14 via the rotary shaft 40 and the first power transmission mechanism 30. The power storage mechanism 50 is connected to the output shaft 12 via the fan shaft 14. The power storage mechanism 50 stores power by converting power (rotational power) into energy and storing this energy. The power storage mechanism 50 releases the stored energy as power (rotational power). The energy stored in the power storage mechanism 50 is, for example, elastic energy, and is, for example, potential energy (see the second embodiment). The power storage mechanism 50 does not store power. For example, the power storage mechanism 50 stores power using the mainspring spring 52. The power storage mechanism 50 includes a mainspring case 51 and a mainspring spring 52.

  The mainspring case 51 is a container that houses the mainspring spring 52.

  The mainspring spring 52 is a leaf spring (spiral spring) wound in a spiral shape. One end of the mainspring spring 52 is fixed to the rotary shaft 40, and the other end of the mainspring spring 52 is fixed to the mainspring case 51.

  The second power transmission mechanism 60 transmits the power of the rotating shaft 40 to the vibration exciting mechanism 70 only when the rotating shaft 40 rotates in the reverse direction. The second power transmission mechanism 60 does not transmit power between the rotation shaft 40 and the excitation mechanism 70 when the rotation shaft 40 is rotating forward. The second power transmission mechanism 60 is connected to the rotating shaft 40. The second power transmission mechanism 60 is connected to the vibration mechanism 70. The second power transmission mechanism 60 includes a second belt 61 and a second clutch 62.

  The second belt 61 transmits power between the rotating shaft 40 and the second clutch 62. The second belt 61 is attached to the rotation shaft 40 and interlocks with the rotation shaft 40. The second belt 61 is interlocked with bidirectional rotation (forward rotation and reverse rotation) of the rotation shaft 40.

  The second clutch 62 switches the presence / absence of power transmission between the second belt 61 and the excitation shaft 71 (between the rotating shaft 40 and the excitation mechanism 70). A second belt 61 is attached to the second clutch 62. The second clutch 62 is attached to the excitation shaft 71. In addition, the 2nd clutch 62 may be attached to the rotating shaft 40, and the 2nd belt 61 may be attached to the excitation shaft 71 (not shown). The second clutch 62 is, for example, a one-way clutch.

  The second clutch 62 performs power transmission between the rotating shaft 40 and a vibration mechanism 70 (a vibration shaft 71 described later) only when a predetermined condition is satisfied. The second clutch 62 performs the above power transmission in the case of [Condition C for power transmission] described below. The second clutch 62 does not transmit the power described above, for example, in the case of [Condition D for not transmitting power] described below. [Condition C for transmitting power] When the rotating shaft 40 rotates in the reverse direction. [Condition D for not transmitting power] When the rotary shaft 40 is rotating forward. Even when the rotating shaft 40 is stopped, the second clutch 62 does not transmit the power.

  The vibration mechanism 70 vibrates the filter 17. The vibration mechanism 70 vibrates the filter 17 in the airflow direction X, for example. The vibration mechanism 70 may vibrate the filter 17 in a direction orthogonal to the airflow direction X (for example, the vertical direction). The vibration mechanism 70 is connected to the power storage mechanism 50. The vibration mechanism 70 is connected to the power storage mechanism 50 via the second power transmission mechanism 60 and the rotating shaft 40. The vibration mechanism 70 includes a vibration shaft 71 and a vibration head 73.

  The excitation shaft 71 is connected to the second power transmission mechanism 60. The excitation shaft 71 is a shaft (mandrel) that is rotatably supported by the excitation shaft bearing 72.

  The vibration head 73 is a portion that vibrates the filter 17 (applies an impact force to the filter 17). The vibration head 73 vibrates the filter 17 as the vibration shaft 71 rotates. The vibration head 73 converts the rotational motion of the vibration shaft 71 into, for example, a reciprocating motion. The vibration head 73 includes, for example, a cam mechanism and a crank mechanism.

(Operation)
The outline of the operation of the dustproof device 1 is as follows. When the fan 13 is driven (when the fan 13 is driven), the power transmitted from the drive source 11 to the power storage mechanism 50 is stored in the power storage mechanism 50. When the fan 13 is stopped (when the fan 13 is stopped), the power stored in the power storage mechanism 50 is released to the vibration mechanism 70 and the filter 17 is vibrated. Details of the operation of the dustproof device 1 are as follows.

(Operation of cooling structure (11-17) when driving fan 13)
The operation of the cooling structure (11-17) when the fan 13 is driven is as follows. In conjunction with the drive of the drive source 11, the fan 13 is driven and dust is accumulated in the filter 17. More specifically, when the drive source 11 is driven, the output shaft 12 rotates. The power of the output shaft 12 is transmitted to the fan shaft 14 via the drive source power transmission mechanism 20. As the fan shaft 14 rotates, the fan 13 rotates (drives) and an airflow C is generated. The airflow C is sucked into the machine room from outside the machine room (position on the upstream side X1 from the filter 17). The airflow C passes through the filter 17, the heat exchanger 15, and the drive source 11. Dust in the airflow C on the upstream side X1 from the filter 17 is removed by the filter 17. As the driving of the driving source 11 (operation of the construction machine) continues, dust is accumulated in the filter 17.

(Operations of the first power transmission mechanism 30 and the rotating shaft 40 when the fan 13 is driven)
When the fan 13 is driven, the first power transmission mechanism 30 transmits the power of the drive source 11 to the rotary shaft 40. When the fan 13 is driven, the rotary shaft 40 rotates forward (follows) in conjunction with the drive source 11 and the fan 13. More specifically, the first belt 31 operates in conjunction with the rotation of the fan shaft 14. The first clutch 32 transmits the power of the first belt 31 to the rotating shaft 40 to cause the rotating shaft 40 to rotate forward.

(Operation of the power storage mechanism 50 when the fan 13 is driven)
When the fan 13 is driven, the power storage mechanism 50 stores the power transmitted from the drive source 11. More specifically, the power of the rotating shaft 40 that rotates forward is transmitted to the power storage mechanism 50. The rotary shaft 40 winds the mainspring spring 52 around the mainspring case 51. When the mainspring spring 52 is wound up to a predetermined amount (when it is wound), the mainspring spring 52 idles with respect to the mainspring case 51 as the rotary shaft 40 rotates forward. Thus, power is automatically stored in the power storage mechanism 50 when the fan 13 is driven.

(Operation of the second power transmission mechanism 60 when the fan 13 is driven and stop of the vibration mechanism 70)
When the fan 13 is driven, the filter 17 is not vibrated. More specifically, when the rotary shaft 40 is rotating forward, the power storage mechanism 50 does not release power. When the rotating shaft 40 is rotating forward, the second power transmission mechanism 60 does not transmit the power of the rotating shaft 40 to the excitation shaft 71. The second belt 61 rotates in conjunction with the forward rotation of the rotation shaft 40, but the second clutch 62 does not transmit the power of the second belt 61 to the excitation shaft 71. As a result of the excitation shaft 71 not rotating, the excitation head 73 does not vibrate the filter 17.

(Operation of cooling structure (11-17) when fan 13 is stopped)
The operation of the cooling structure (11-17) when the fan 13 is stopped (when the fan 13 is stopped) is as follows. The fan 13 stops in conjunction with the stop of the output shaft 12 (stop of driving of the drive source 11). More specifically, the fan shaft 14 stops as the output shaft 12 stops. As a result, the fan 13 stops and the generation of the airflow C by the fan 13 stops. Further, as a result of the fan shaft 14 stopping, the first power transmission mechanism 30 does not transmit power from the fan shaft 14 to the rotating shaft 40. Therefore, the rotating shaft 40 does not rotate forward (forward rotation stops).

(Operation of the power storage mechanism 50 when the fan 13 is stopped)
When the fan 13 is stopped, the power storage mechanism 50 releases the power stored in the power storage mechanism 50 to the vibration mechanism 70. More specifically, when the rotating shaft 40 does not rotate forward (when stopped or when rotating reversely), the power storage mechanism 50 supplies the power stored in the power storage mechanism 50 to the rotating shaft 40. discharge. At this time, the direction of power released from the power storage mechanism 50 to the rotating shaft 40 is a direction in which the rotating shaft 40 rotates in the reverse direction. More specifically, when the rotary shaft 40 does not rotate forward, the rotary shaft 40 does not wind up the mainspring spring 52 (the rotary shaft 40 does not have a force to wind up the mainspring spring 52). At this time, the mainspring spring 52 is rewound (rotates in the direction opposite to the winding direction). Therefore, the rotating shaft 40 rotates in the reverse direction.

(Operation of the first power transmission mechanism 30 when the fan 13 is stopped)
When the rotating shaft 40 rotates in the reverse direction (when the fan 13 is stopped), the first power transmission mechanism 30 does not transmit power between the rotating shaft 40 and the fan shaft 14. More specifically, when the rotating shaft 40 rotates in the reverse direction, the first clutch 32 rotates idle, and the first belt 31 does not rotate.

(Operations of the second power transmission mechanism 60 and the excitation mechanism 70 when the fan 13 is stopped)
When the fan 13 is stopped, the filter 17 is vibrated. More specifically, when the rotating shaft 40 rotates in the reverse direction, the second power transmission mechanism 60 transmits power from the rotating shaft 40 to the vibration exciting mechanism 70. Specifically, the second belt 61 rotates in conjunction with the reverse rotation of the rotation shaft 40. The power of the second belt 61 is transmitted to the excitation shaft 71 by the second clutch 62. As the vibration shaft 71 rotates, the vibration head 73 vibrates the filter 17. Thus, if the fan 13 is stopped, the filter 17 is automatically vibrated. This vibration is automatically stopped when all (or a predetermined amount) of power stored in the power storage mechanism 50 is released (a certain time has elapsed). When the filter 17 is vibrated, the dust accumulated in the filter 17 is shaken off and the filter 17 is cleaned. At this time, the fan 13 is stopped and the airflow C is not generated. Therefore, the dust that has been shaken off from the filter 17 is not sucked (re-adsorbed) again into the filter 17 by the airflow C.

(Effect 1)
The effect by the dustproof apparatus 1 shown in FIG. 1 is demonstrated. The dustproof device 1 includes a drive source 11, a fan 13 driven by power transmitted from the drive source 11, and a filter 17 through which an airflow C generated by driving the fan 13 passes. The dustproof device 1 further includes a power storage mechanism 50 and a vibration mechanism 70. The power storage mechanism 50 is connected to the fan 13 and the drive source 11. The vibration mechanism 70 is connected to the power storage mechanism 50 and vibrates the filter 17.
[Configuration 1-1] The power storage mechanism 50 stores the power transmitted from the drive source 11 to the power storage mechanism 50 when the fan 13 is driven.
[Configuration 1-2] The power storage mechanism 50 releases the power stored in the power storage mechanism 50 to the vibration mechanism 70 when the fan 13 is stopped.

  With the [Configuration 1-1] and [Configuration 1-2], the vibration mechanism 70 vibrates the filter 17 using the power of the drive source 11 of the fan 13. Therefore, the filter 17 can be vibrated without using a power source other than the drive source 11 of the fan 13 (“other power source”) (for example, electric power or hydraulic power). As a result, the cost due to the provision of the “other power source” can be reduced, and the construction of the construction machine due to the provision of the “other power source” can be suppressed.

  In the above [Configuration 1-1] and [Configuration 1-2], the vibration mechanism 70 vibrates the filter 17 using the power of the drive source 11 of the fan 13. Here, if the fan 13 and the vibration mechanism 70 are operated simultaneously, the dust that has been shaken off from the filter 17 may be re-adsorbed to the filter 17 by the airflow C generated by the fan 13. Therefore, in the above [Configuration 1-2], the vibration mechanism 70 vibrates the filter 17 when the fan 13 is stopped. Therefore, re-adsorption to the filter 17 of the dust shaken off from the filter 17 can be suppressed. Since the dust can be reliably dropped from the filter 17 when the fan 13 is stopped, the filter 17 can be reliably cleaned. In addition, when the fan 13 is driving, the vibration mechanism 70 may operate, and the re-adsorption may occur. At least when the fan 13 is stopped, the above re-adsorption does not occur.

(Effect 2)
The dustproof device 1 includes a rotating shaft 40 connected to the power storage mechanism 50, a first power transmission mechanism 30 connected to the rotating shaft 40 and the drive source 11, and a first shaft connected to the rotating shaft 40 and the excitation mechanism 70. 2 power transmission mechanism 60.
[Configuration 2-1] The first power transmission mechanism 30 forwardly rotates the rotating shaft 40 by transmitting power from the driving source 11 to the rotating shaft 40 only when the fan 13 is driven.
[Configuration 2-2] The power storage mechanism 50 stores the power transmitted from the rotating shaft 40 that rotates forward to the power storage mechanism 50.
[Configuration 2-3] The power accumulating mechanism 50 causes the power accumulated in the power accumulating mechanism 50 to be applied to the rotating shaft 40 in the direction in which the rotating shaft 40 rotates in the reverse direction when the rotating shaft 40 is stopped or reversely rotated. discharge.
[Configuration 2-4] The second power transmission mechanism 60 transmits power from the rotating shaft 40 to the vibration exciting mechanism 70 only when the rotating shaft 40 rotates in the reverse direction.

  As described above, in the dustproof device 1, in conjunction with the drive and stop of the fan 13, power is stored in the power storage mechanism 50 (the above [Configuration 1-1]) and power is released from the power storage mechanism 50. ([Configuration 1-2] above) is switched (referred to as “switching α”). In the above [Configuration 2-1] to [Configuration 2-4], mechanical elements that transmit and store power (specifically, the first power transmission mechanism 30, the rotating shaft 40, the power storage mechanism 50, and the second power transmission). Switching α can be performed only by the mechanism 60). Therefore, it is not necessary to provide a device (described later) for performing the switching α separately from a mechanical element that transmits and accumulates power.

Details of the apparatus for performing the switching α are as follows.
[Prior Art 3] Claim 11 of Patent Document 1 states that “operation stop detection means for detecting the stop of the engine as the power source of the machine and engine stoppage detected by the operation detection stop detection means. And sometimes a control means for operating the dust removing means. " In the paragraphs [0055] to [0056] of the specification of the document, the above-mentioned “switching α” is set using the engine switch (20) as the operation stop detection means and the controller (19) as the control means. It is described that such switching is performed.

  However, the engine switch (20) (electronic detection device) and the controller (19) which are control means used in [Prior Art 3] are electronic components. These electronic components are inferior in durability to machine elements and may have a more complicated configuration (such as wiring) than machine elements. On the other hand, in the dustproof device 1 of the present embodiment, the switching α can be performed without the need to provide these electronic components. Therefore, the durability of the dustproof device 1 can be improved, and the configuration of the dustproof device 1 can be simplified.

(Effect 3)
[Configuration 3] The power storage mechanism 50 stores power using the mainspring spring 52.

  With the above [Configuration 3], power can be reliably accumulated with a simple configuration. For example, the mainspring spring 52 is less likely to break when compared with the one that accumulates power by twisting a rubber cord, so that the frequency of maintenance of the power accumulation mechanism 50 can be suppressed. Further, for example, when compared with a device that accumulates power using gravity (see the second embodiment), the power storage mechanism 50 can be configured compactly in the above [Configuration 3].

(Second Embodiment)
With reference to FIG. 2, the difference from 1st Embodiment is demonstrated about the dustproof apparatus 101 of 2nd Embodiment. The difference between the dustproof device 101 of the second embodiment and the dustproof device 1 of the first embodiment (see FIG. 1) is the configuration of the power storage mechanism 150. In addition, about the common point with 1st Embodiment among the dustproof apparatuses 101, the code | symbol same as 1st Embodiment was attached | subjected and description was abbreviate | omitted.

  The power storage mechanism 150 is configured as follows. The power storage mechanism 50 of the first embodiment shown in FIG. 1 stores the power transmitted from the rotary shaft 40 as the elastic energy of the mainspring spring 52. On the other hand, the power storage mechanism 150 of the second embodiment shown in FIG. 2 stores the power transmitted from the rotary shaft 40 as the potential energy of the weight 154. The power storage mechanism 150 includes a wire 153 and a weight 154.

  The wire 153 is connected to the rotating shaft 40 and the weight 154. One end of the wire 153 is fixed to the rotating shaft 40. The other end of the wire 153 is fixed to the weight 154.

  The weight of the weight 154 is set to a weight that can drive the excitation mechanism 70. The weight of the weight 154 is set to a weight with which the weight 154 can be lifted by the positive rotation power of the rotating shaft 40.

(Operation)
The difference in the operation of the dustproof device 101 of the second embodiment shown in FIG. 2 with respect to the operation of the dustproof device 1 of the first embodiment shown in FIG. 1 is as follows.

  When the fan 13 is driven, the rotating shaft 40 rotates forward as described above. The rotating shaft 40 rotating in the forward direction raises the weight 154 by winding the wire 153. When the weight 154 rises to a predetermined position (height), the rise of the weight 154 stops. For example, when the weight 154 rises to a predetermined position, the wire 153 is idled with respect to the rotating shaft 40.

  When the fan 13 is stopped, the rotating shaft 40 does not rotate forward as described above. At this time, when the weight 154 is lowered, the wire 153 rotates the rotating shaft 40 in the reverse direction. As a result, the filter 17 is vibrated by operating the vibration mechanism 70 as described above.

(Modification)
Each of the above embodiments can be variously modified. For example, you may combine the component in each embodiment. Specifically, for example, the dustproof device 1 (101) includes both the power storage mechanism 50 of the first embodiment (see FIG. 1) and the power storage mechanism 150 of the second embodiment (see FIG. 2). May be configured.
Further, for example, the power storage mechanism 50 shown in FIG. 1 may be one that stores power by twisting a rubber string.

1, 101 Dustproof device (Dustproof device for construction machinery)
DESCRIPTION OF SYMBOLS 11 Drive source 13 Fan 17 Filter 30 1st power transmission mechanism 40 Rotating shaft 50, 150 Power storage mechanism 60 2nd power transmission mechanism 70 Excitation mechanism

Claims (3)

A driving source;
A fan driven by power transmitted from the drive source;
A filter through which airflow generated by driving the fan passes,
A power storage mechanism connected to the fan and the drive source;
An excitation mechanism connected to the power storage mechanism for exciting the filter;
With
The power storage mechanism stores power transmitted from the drive source to the power storage mechanism when the fan is driven,
The power storage mechanism releases the power stored in the power storage mechanism to the vibration mechanism when the fan is stopped.
A dustproof device for construction machinery. A dustproof device for a construction machine according to claim 1,
A rotating shaft connected to the power storage mechanism;
A first power transmission mechanism connected to the rotating shaft and the drive source;
A second power transmission mechanism connected to the rotating shaft and the excitation mechanism;
With
The first power transmission mechanism rotates the rotating shaft forward by transmitting power from the driving source to the rotating shaft only when the fan is driven.
The power storage mechanism stores power transmitted to the power storage mechanism from the rotating shaft that rotates forward,
The power accumulation mechanism releases the power accumulated in the power accumulation mechanism to the rotation shaft in a direction in which the rotation shaft rotates in the reverse direction when the rotation shaft is stopped or reversely rotated.
The second power transmission mechanism transmits power from the rotary shaft to the excitation mechanism only when the rotary shaft rotates in reverse.
A dustproof device for construction machinery. A dustproof device for a construction machine according to claim 1 or 2,
The power storage mechanism stores power using a mainspring spring.
A dustproof device for construction machinery.