Work Machine

Abstract

To provide a working machine capable of facilitating to clean of a discharge space of a storage case into which dust is discharged by a removal unit for removing dust from cooling air flow to a heat exchanger.SOLUTION: The working machine includes: a main body; a piece of working equipment attached to the main body; a cooling fan accommodated inside an engine room provided to the main body for guiding cooling air; a heat exchanger placed upstream of the cooling fan with respect to the cooling air for exchanging heat with the cooling air; a removal unit placed upstream of the heat exchanger with respect to the flow of cooling air, which changes the cooling air to a swirling flow and removes dust included in the swirling flow using centrifugal force; and, a storage case storing the removal unit forms a discharge space into which dust is discharged from the removal unit. The storage case has a discharge port for discharging dust from the discharge space and a cleaning window that is opened when cleaning the discharge space and for blowing air toward the discharge space.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a work machine equipped with a dust removal device that removes dust from cooling air that is guided to a heat exchanger by a cooling fan. [Background technology]

[0002] Work machines such as hydraulic excavators are used in dusty environments. Therefore, the cooling air taken into the engine room contains dust. In addition, when the cooling air passes through a heat exchanger, the dust contained in the cooling air adheres to the heat exchanger, which can cause clogging of the heat exchanger.

[0003] Therefore, in the construction machine described in Patent Document 1, a removal device is disposed facing the heat exchanger unit on the upstream side of the cooling air flow, and the removal device removes dust contained in the cooling air. The removal device changes the cooling air into a swirling flow, and removes dust contained in the swirling flow by centrifugal force. The cooling air from which the dust has been removed is led to the heat exchanger unit and passes through the heat exchanger unit. The removal device is also stored inside the storage case, and discharges dust into a discharge space formed inside the storage case. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6580607 Summary of the Invention [Problem to be solved by the invention]

[0005] The dust discharged from the removal device accumulates on the walls and unevenness inside the storage case, and accumulates in the discharge space. In addition, when multiple removal devices are stored inside the storage case, dust discharged from each removal device may accumulate in the other removal devices, which may affect the discharge of dust by the removal devices. Therefore, it is necessary to discharge the dust from the discharge space and clean the discharge space. However, with the construction machine described in Patent Document 1, it is difficult to efficiently clean the discharge space of the storage case.

[0006] The present invention has been made in consideration of the above-mentioned situation, and its object is to provide a work machine that makes it easier to clean the discharge space of a storage case, where dust is discharged by a removal device that removes dust from the cooling air flowing to a heat exchanger. [Means for solving the problem]

[0007] In order to achieve the above object, a representative aspect of the present invention is a work machine comprising a main body, a working device attached to the main body, a cooling fan housed inside an engine room provided in the main body and guiding cooling air, a heat exchanger arranged upstream of the cooling fan with respect to the flow of the cooling air and performing heat exchange with the cooling air, a removal device arranged upstream of the heat exchanger with respect to the flow of the cooling air, changing the cooling air into a swirling flow and removing dust contained in the swirling flow by centrifugal force, and a storage case that houses the removal device and forms a discharge space from which dust is discharged from the removal device, the storage case having a discharge port for discharging dust from the discharge space, It is opened or closed by the lid. a cleaning window that is opened when cleaning the discharge space and allows air to be blown into the discharge space; The cleaning window is disposed at a position facing the discharge outlet with the discharge space and the plurality of removal devices interposed therebetween, and a distance from the discharge outlet to the removal devices is greater than a distance from the cleaning window to the removal devices. It is characterized by: Effect of the Invention

[0008] According to the present invention, it is possible to easily clean the discharge space of the storage case, into which dust is discharged, by a dust removal device that removes dust from the cooling air flowing toward the heat exchanger. Note that problems, configurations, and effects other than those described above will become apparent from the description of the following embodiments. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a side view of a hydraulic excavator that is a representative example of a work machine according to a first embodiment. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a rear view showing a schematic internal structure of the engine compartment. [Figure 4] FIG. 2 is a perspective view of a cut removal device. [Diagram 5] FIG. 2 is a side view of a cut removal device. [Figure 6] 1 is a perspective view of the storage case with the cleaning window closed. FIG. [Figure 7] FIG. 4 is a perspective view of the storage case with the cleaning window open. [Figure 8] FIG. 2 is a block diagram showing the configuration of a warning device. [Figure 9] FIG. 11 is a side view of a hydraulic excavator according to a second embodiment. [Figure 10] FIG. 2 is a rear view showing a schematic internal structure of the engine compartment. [Figure 11] FIG. 4 is a perspective view of an upper rotating body with the opening / closing cover open. [Figure 12] 1 is a perspective view of an upper rotating body with the opening / closing cover closed and the cleaning window lid open; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (First embodiment) An embodiment of a work machine according to the present invention will be described with reference to the drawings. Fig. 1 is a side view of a hydraulic excavator 1, which is a representative example of a work machine according to the first embodiment. In this specification, front, back, left and right are based on the viewpoint of an operator who rides on and operates the hydraulic excavator 1, unless otherwise specified.

[0011] The hydraulic excavator 1 comprises a lower traveling body 2, an upper rotating body 3 supported by the lower traveling body 2, and a working device 4 attached to the upper rotating body 3. The lower traveling body 2 and the upper rotating body 3 are an example of the main body of the hydraulic excavator 1. The lower traveling body 2 comprises a pair of left and right endless tracks 8. When the rotation of a traveling motor (not shown) is transmitted to the pair of left and right endless tracks 8 and the endless tracks 8 rotate, the hydraulic excavator 1 travels. However, the lower traveling body 2 may be of a wheeled type instead of an endless track.

[0012] The upper rotating body 3 is supported by the lower traveling body 2 in a state in which it can rotate by a rotating motor (not shown). The upper rotating body 3 mainly comprises a rotating frame 5 which serves as a base, a cab 7 arranged on the front left side of the rotating frame 5, a counterweight 6 arranged at the rear of the rotating frame 5, and an engine room (building) 10. The working device 4 is a front working machine which performs work such as excavating earth and sand, and is attached to the front center of the rotating frame 5 so as to be rotatable up and down.

[0013] The working device 4 includes a boom 4a supported on the upper rotating body 3 so as to be able to rise and fall, an arm 4b supported swingably at the tip of the boom 4a, a bucket 4c supported swingably at the tip of the arm 4b, and hydraulic cylinders 4d-4f that drive the boom 4a, the arm 4b, and the bucket 4c. The counterweight 6 is a heavy object for balancing the weight with the working device 4, and is supported by the rotating frame 5 at the rear end of the upper rotating body 3.

[0014] The cab 7 defines an internal space in which an operator who operates the hydraulic excavator 1 sits. Inside the cab 7, there are arranged a seat (not shown) on which the operator sits, and operation devices (steering wheel, pedals, levers, switches, etc.) operated by the operator seated on the seat. When the operator in the cab 7 operates the operation devices, the lower traveling body 2 travels, the upper rotating body 3 rotates, and the working device 4 operates.

[0015] The engine room 10 is provided between the cab 7 of the upper rotating body 3 and the counterweight 6, and is supported by the rotating frame 5 behind the working implement 4 and the cab 7 and in front of the counterweight 6. The engine room 10 extends over the entire left-right area of ​​the rotating frame 5. The upper part of the engine room 10 is covered by an engine cover 12, and a removal device 40 (described later) is exposed on the left side.

[0016] Fig. 2 is a perspective view of the upper rotating body 3 shown in Fig. 1. A part of the upper rotating body 3 is omitted in Fig. 2. Fig. 3 is a rear view that typically shows the internal structure of the engine room 10.

[0017] A hydraulic pump 20, an engine 21, a cooling fan 22, a heat exchanger 23, and a storage case 30 are housed in this order from right to left inside the engine room 10. The engine 21 is a drive source for the hydraulic excavator 1, and generates a drive force for operating the hydraulic excavator 1. The hydraulic pump 20 is driven by the engine 21, and supplies hydraulic oil stored in a hydraulic oil tank (not shown) to the travel motor, the swing motor, and the hydraulic cylinders 4d to 4f.

[0018] A coolant passage through which coolant (e.g., water, oil) passes is formed inside the engine 21. The coolant is supplied from the heat exchanger 23, passes through the coolant passage to cool the engine 21, and then returns to the heat exchanger 23. The heat exchanger 23 includes a radiator (not shown) that cools the coolant returned from the engine 21, and supplies the coolant cooled by the radiator to the engine 21 again. Note that the heat exchanger 23 may include a heat exchanger other than a radiator, such as an oil cooler that cools hydraulic oil or an intercooler that cools the intake air of the turbocharged engine 21.

[0019] The cooling fan 22 is attached to the drive shaft of the engine 21 via a pulley and a belt, and rotates by the driving force transmitted from the engine 21. As the cooling fan 22 rotates, a flow of cooling air is induced inside the engine compartment 10. As a result, the cooling fan 22 generates a flow of cooling air for cooling the engine 21 and the heat exchanger 23. The storage case 30, the heat exchanger 23, the cooling fan 22, and the engine 21 are arranged in this order from the upstream side to the downstream side of the flow of cooling air by the cooling fan 22. The engine 21 is arranged downstream of the cooling fan 22 with respect to the flow of cooling air, and is cooled by the cooling air generated by the cooling fan 22.

[0020] The heat exchanger 23 is disposed upstream of the cooling fan 22 with respect to the flow of cooling air, and faces the cooling fan 22. The cooling fan 22 generates negative pressure between the heat exchanger 23 and the cooling fan 22, and guides the cooling air to the heat exchanger 23. As the cooling fan 22 rotates, air outside the engine room 10 (outside air) is taken into the engine room 10 as cooling air, and passes through the heat exchanger 23. The heat exchanger 23 exchanges heat with the cooling air guided by the cooling fan 22.

[0021] A storage case 30 is disposed facing the heat exchanger 23 at a position upstream of the heat exchanger 23 with respect to the flow of cooling air guided to the heat exchanger 23. The storage case 30 is formed in a rectangular parallelepiped shape and is attached to the upper rotating body 3. A plurality of removal devices 40 are housed inside the storage case 30. The storage case 30 and the removal devices 40 are provided exposed to the side of the engine room 10. The plurality of removal devices 40 are provided spaced apart from one another in the vertical and horizontal directions and are disposed upstream of the heat exchanger 23 with respect to the flow of cooling air by the cooling fan 22. The removal devices 40 change the flow of cooling air into a swirling flow and remove dust contained in the swirling flow by centrifugal force.

[0022] The cooling air passes through the removal device 40, the heat exchanger 23, the cooling fan 22, and the engine 21 in this order inside the engine compartment 10. The removal device 40 is disposed opposite the heat exchanger 23, and removes dust contained in the cooling air guided to the heat exchanger 23.

[0023] Fig. 4 is a perspective view of a cut-away removal device 40. Fig. 5 is a side view of the cut-away removal device 40. The removal device 40 is attached to an upstream wall 31 located on the upstream side of the flow of cooling air in the storage case 30 and a downstream wall 32 located on the downstream side of the flow of cooling air, and is stored in a discharge space 33 formed inside the storage case 30. The discharge space 33 is a space located outside the removal device 40 in the internal space of the storage case 30. The removal device 40 discharges dust into the discharge space 33.

[0024] The removal device 40 is made of, for example, synthetic resin, and has a cylindrical first cylinder 41 and a second cylinder 50. The first cylinder 41 has an upstream opening 42 located at one end on the upstream side of the flow of cooling air, a downstream opening 43 located at the other end on the downstream side of the flow of cooling air, and a cavity 44 extending from the upstream opening 42 to the downstream opening 43. The upstream opening 42 of the first cylinder 41 is disposed in an upstream hole 31a formed in the upstream wall 31 of the storage case 30, and is fixed to the upstream hole 31a without any gaps by deformation due to heating. The downstream opening 43 of the first cylinder 41 is disposed in the discharge space 33.

[0025] The removal device 40 has a spiral blade 45 fixed to the inner circumferential surface of the first cylindrical body 41, a shaft portion 46 supporting the blade 45, and a connecting portion 47 connecting the shaft portion 46 to the inner circumferential surface of the first cylindrical body 41. The blade 45 is provided at a position on the upstream opening 42 side within the hollow portion 44 of the first cylindrical body 41, and changes the flow of the cooling air guided to the removal device 40 into a swirling flow. As a result, the cooling air swirls within the hollow portion 44 and is blown against the inner circumferential surface of the hollow portion 44.

[0026] The second cylinder 50 has an upstream opening 51 located at one end on the upstream side of the cooling air flow, a downstream opening 52 located at the other end on the downstream side of the cooling air flow, a hollow portion 53 extending from the upstream opening 51 to the downstream opening 52, and an annular reinforcing portion 54 provided on the outer circumferential surface of the upstream opening 51. The downstream opening 52 of the second cylinder 50 is disposed within a downstream hole 32a formed in the downstream wall 32 of the storage case 30, and is fixed to the downstream hole 32a without any gaps by deformation due to heating.

[0027] The outer diameter of the upstream opening 51 of the second cylinder 50 is smaller than the outer diameter of the downstream opening 52 and the inner diameter of the downstream opening 43 of the first cylinder 41. The upstream opening 51 of the second cylinder 50 is located in the cavity 44 of the first cylinder 41 and is disposed upstream of the downstream opening 43 of the first cylinder 41 in the flow of cooling air. Between the upstream opening 51 of the second cylinder 50 and the downstream opening 43 of the first cylinder 41, a gap 48 capable of discharging dust is formed between the outer peripheral surface of the second cylinder 50 and the inner peripheral surface of the first cylinder 41.

[0028] The cooling air is guided to the removal device 40 and flows into the upstream opening 42 of the first cylinder 41. Inside the first cylinder 41, the flow of the cooling air is changed into a swirling flow by the blades 45 and flows inside the cavity 44. Dust contained in the cooling air is blown toward the inner circumferential surface of the first cylinder 41 by the centrifugal force of the swirling flow, and is separated and removed from the cooling air by the centrifugal force. The clean cooling air from which the dust has been removed flows from the upstream opening 51 of the second cylinder 50 through the cavity 53 and out of the downstream opening 52.

[0029] After removing the dust, the removal device 40 causes the cooling air to flow toward the heat exchanger 23, and guides the cooling air from which the dust has been removed to the heat exchanger 23. The dust separated from the cooling air flows along the inner circumferential surface of the first cylinder 41 and is discharged together with a portion of the cooling air from the gap 48 between the first cylinder 41 and the second cylinder 50 toward the outside of the removal device 40. The dust is discharged from the removal device 40 into the discharge space 33 of the storage case 30, and accumulates in the discharge space 33.

[0030] 2 and 3, the storage case 30 has a discharge port 34 for discharging dust from the discharge space 33, and an openable and closable cleaning window 35 used for cleaning the discharge space 33. The discharge space 33 is formed inside the storage case 30 from the cleaning window 35 to the discharge port 34. The discharge port 34 and the cleaning window 35 communicate with the discharge space 33, and are located between the discharge space 33 and the outside of the storage case 30.

[0031] The discharge port 34 is always open. The discharge space 33 is opened toward the outside of the storage case 30 by the discharge port 34. Dust accumulated in the discharge space 33 is discharged to the outside of the storage case 30 through the discharge port 34. The cleaning window 35 is opened when the discharge space 33 is being cleaned, and is closed at other times when the discharge space 33 is not being cleaned. When the cleaning window 35 is open, the discharge space 33 is opened toward the outside of the storage case 30 by the cleaning window 35. When the cleaning window 35 is closed, the discharge space 33 is closed by the cleaning window 35.

[0032] The storage case 30 defines a discharge space 33 by an upstream wall 31, a downstream wall 32, a lower surface 36, and an upper surface 37. The discharge port 34 is provided on the lower surface 36 of the storage case 30, and the lower surface 36 and the discharge port 34 are located below the removal device 40 and the discharge space 33. The cleaning window 35 is provided on the upper surface 37 of the storage case 30, and the upper surface 37 and the cleaning window 35 are located above the removal device 40 and the discharge space 33. The cleaning window 35 is also disposed above the discharge port 34, and is disposed at a position facing the discharge port 34 in the up-down direction with the discharge space 33 and the removal device 40 in between. The multiple removal devices 40 are disposed in the discharge space 33 between the cleaning window 35 and the discharge port 34.

[0033] The discharge port 34 is formed in the lower surface 36 of the storage case 30, and opens toward the discharge space 33. Dust in the discharge space 33 falls downward by gravity and is discharged from the discharge port 34. The vertical distance (clearance) from the discharge port 34 to the removal device 40 is longer than the vertical distance from the cleaning window 35 to the removal device 40. Therefore, even if air flows from the discharge port 34 toward the discharge space 33, the swirling flow generated inside the removal device 40 is not obstructed by the flowing air.

[0034] Fig. 6 is a perspective view of the storage case 30 with the cleaning window 35 closed. Fig. 7 is a perspective view of the storage case 30 with the cleaning window 35 open. The cleaning window 35 has a cleaning opening 35a formed in the upper surface portion 37 of the storage case 30 and opening toward the discharge space 33, and a lid body 35b that opens and closes the cleaning opening 35a. The lid body 35b is rotatably attached to the upper surface portion 37 by a hinge, for example, and fixed to the upper surface portion 37 by a bolt or a wing bolt.

[0035] A plate-shaped rubber material (not shown) is attached along the edge of the lid body 35b. When the cleaning opening 35a is closed by the lid body 35b, the rubber material of the lid body 35b abuts against the upper surface 37. The rubber material prevents a gap from being generated between the lid body 35b and the upper surface 37. By moving the lid body 35b away from the cleaning opening 35a, the cleaning opening 35a and the cleaning window 35 are opened.

[0036] When cleaning the discharge space 33, the cleaning window 35 is opened with the engine 21 stopped, and the discharge space 33 is opened to the outside of the storage case 30 through the cleaning window 35. The cleaning window 35 can blow air toward the discharge space 33 through the cleaning port 35a.

[0037] For example, air for removing dust in the discharge space 33 is blown into the discharge space 33 from the cleaning opening 35a of the cleaning window 35 by air blowing. The dust is blown inside the discharge space 33 toward the discharge opening 34 by the air blowing, and is discharged from the discharge opening 34. As a result, the dust is discharged and removed from the discharge space 33, and the discharge space 33 is cleaned.

[0038] When the cooling fan 22 is rotated with the cleaning window 35 open, air flows from the cleaning window 35 toward the discharge space 33, and the air that flows in generates an air flow from the gap 48 of the removal device 40 toward the inside of the removal device 40. This prevents the swirling flow generated inside the removal device 40, and reduces the centrifugal force acting on the dust inside the removal device 40. Therefore, when the hydraulic excavator 1 is operated with the cleaning window 35 open, a warning device 60 shown in Fig. 8 warns the operator operating the hydraulic excavator 1 that the cleaning window 35 is open. Fig. 8 is a block diagram showing the configuration of the warning device 60.

[0039] The warning device 60 includes a controller 61 mounted on the hydraulic excavator 1, a proximity sensor (detection sensor) 62 attached to the storage case 30, and a monitor (alarm device) 63 provided inside the cab 7. The controller 61 has a CPU (Central Processing Unit) 64, a ROM (Read Only Memory) 65, and a RAM (Random Access Memory) 66. The controller 61 executes warning processing by having the CPU 64 read and execute a program stored in the ROM 65. The RAM 66 is used as a work area when the CPU 64 executes the program.

[0040] However, the configuration of the controller 61 is not particularly limited, and may be realized by hardware such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA).

[0041] The proximity sensor 62 is an example of a detection sensor that detects the opening of the cleaning window 35. The proximity sensor 62 is, for example, disposed in proximity to the lid body 35b that opens the cleaning port 35a, and detects the opening of the cleaning window 35 by detecting the lid body 35b. When the proximity sensor 62 detects the opening of the cleaning window 35, it outputs a detection signal to the controller 61. For example, after the hydraulic excavator 1 is operated, the controller 61 causes the monitor 63 to display that the cleaning window 35 is open, based on the detection signal acquired from the proximity sensor 62. The monitor 63 is an example of an alarm device, and when the proximity sensor 62 detects the opening of the cleaning window 35, it alarms the operator that the cleaning window 35 is open.

[0042] According to the first embodiment, for example, the following advantageous effects are achieved.

[0043] Air blown into the discharge space 33 from the cleaning window 35 creates an air flow toward the discharge outlet 34 inside the discharge space 33. Dust inside the discharge space 33 moves toward the discharge outlet 34 by the air flow and is discharged from the discharge outlet 34. In this way, the discharge space 33 of the storage case can be easily cleaned.

[0044] By removing the dust accumulated in the removal device 40, the dust is smoothly discharged from the removal device 40, and the dust is efficiently removed by the removal device 40. By closing the cleaning window 35, the inflow of air from the cleaning window 35 toward the discharge space 33 is prevented. As a result, the swirling flow is not impeded inside the removal device 40, and the dust is reliably separated by centrifugal force.

[0045] When cleaning the discharge space 33, air is blown in through the cleaning window 35 provided on the upper surface 37 of the storage case 30, and dust is discharged from the discharge port 34 provided on the lower surface 36 of the storage case 30. Therefore, the dust inside the discharge space 33 can be efficiently moved from top to bottom to the discharge port 34, and the dust can be easily discharged from the discharge port 34 to the outside of the storage case 30. This allows the discharge space 33 to be efficiently cleaned. By notifying the user that the cleaning window 35 is open by the monitor 63, it is possible to prevent the user from forgetting to close the cleaning window 35.

[0046] The notification device for notifying the opening of the cleaning window 35 is not limited to the monitor 63, and may be, for example, a sound notification or a light notification. The detection sensor for detecting the opening of the cleaning window 35 is not limited to the proximity sensor 62, and may be, for example, a non-contact detection sensor other than the proximity sensor 62, or a contact detection sensor. The cleaning window 35 is not limited to the top surface 37 of the storage case 30, and may be, for example, a portion of the upstream wall 31 located above the removal device 40, a portion of the upstream wall 31 located to the side of the removal device 40, or a side surface of the storage case 30.

[0047] The removal device 40 is not limited to synthetic resin, and may be made of, for example, a metal such as iron material, and attached to the storage case 30 with bolts and nuts. The storage case 30 may be formed into a shape other than a rectangular parallelepiped shape, and may be formed into a home base shape that forms a home base shape when viewed from the upstream side of the cooling air flow. In the home base shaped storage case 30, the lower part of the storage case 30 is formed so that the width gradually narrows downward so that the gradually narrowing part of the home base is located at the lower side. The cooling fan 22 is not limited to a fan driven by the engine 21, and may be, for example, an electrically driven fan or a hydraulically driven fan. In addition, two or more cooling fans 22 may be provided inside the engine room 10.

[0048] Second embodiment Next, a hydraulic excavator 100 according to a second embodiment will be described. FIG. 9 is a side view of the hydraulic excavator 100 according to the second embodiment. As shown in FIG. 9, in the hydraulic excavator 100 according to the second embodiment, an engine room 10-1 has an openable / closable cover 11 that forms a side portion thereof, and an engine cover 12 that forms an upper portion thereof. An air intake port 13 that takes in outside air is formed in the openable / closable cover 11, and a removal device 40 is covered by the openable / closable cover 11. The following description will focus on the features of the second embodiment, and the matters described in the first embodiment will be omitted.

[0049] Fig. 10 is a rear view showing the internal structure of the engine room 10-1. Fig. 11 is a perspective view of the upper rotating body 3 with the opening / closing cover 11 open, and Fig. 12 is a perspective view of the upper rotating body 3 with the opening / closing cover 11 closed while the lid 35b of the cleaning window 35 is open. Note that a part of the upper rotating body 3 is omitted in Figs. 11 and 12.

[0050] In the second embodiment, cooling air is taken into the engine room 10-1 through the air intake port 13 provided in the opening / closing cover 11 (see FIG. 10). When the opening / closing cover 11 is opened, the engine room 10 is opened, and when the opening / closing cover 11 is closed, the engine room 10 is closed. When the opening / closing cover 11 is closed, the opening / closing cover 11 is disposed upstream of the storage case 30 with respect to the flow of cooling air and covers the storage case 30. When the opening / closing cover 11 is open, the storage case 30 is exposed to the outside of the engine room 10 (see FIG. 11). In this way, the opening / closing cover 11 moves between a closed position that covers the cleaning window 35 and an open position that exposes the cleaning window 35, and opens and closes. When cleaning the discharge space 33, the opening / closing cover 11 moves from the closed position toward the open position to be opened. After cleaning the discharge space 33, the opening / closing cover 11 moves from the open position toward the closed position to be closed.

[0051] The cover 35b of the cleaning window 35 opens and closes by moving between a closed position where the cleaning port 35a is closed and an open position where the cleaning port 35a is open. The cleaning port 35a is covered and closed by the cover 35b in the closed position. When cleaning the discharge space 33, the cover 35b moves from the closed position to the open position to open the cleaning port 35a and the cleaning window 35 (see FIG. 11). In the open position, the cover 35b protrudes upward from the storage case 30. After cleaning the discharge space 33, the cover 35b moves from the open position to the closed position to close the cleaning port 35a and the cleaning window 35.

[0052] The lid body 35b, in the open position, is disposed in the movement path of the opening / closing cover 11 moving from the open position to the closed position. Therefore, the lid body 35b in the open position abuts against the opening / closing cover 11 moving from the open position to the closed position, and prevents the opening / closing cover 11 from moving to the closed position. The opening / closing cover 11 stops at an intermediate position between the open position and the closed position, and is maintained in an unclosed state by the lid body 35b (see FIG. 12). In this case, the opening / closing cover 11 is moved toward the open position and separated from the lid body 35b, and then the lid body 35b is moved to the closed position, and the opening / closing cover 11 is moved to the closed position. The lid body 35b, in the closed position, is covered by the opening / closing cover 11 and is accommodated inside the engine room 10.

[0053] According to the second embodiment, in addition to providing the same advantageous effects as the first embodiment described above, the following advantageous effects, for example, are provided.

[0054] The cover 11 is prevented from closing by the lid body 35b in the open position, so that the user can easily recognize that the cleaning window 35 is open. This makes it possible to prevent the user from forgetting to close the cleaning window 35.

[0055] In the first and second embodiments, the present invention has been described by taking as an example a case where the present invention is applied to a hydraulic excavator 1,100, but the present invention can also be applied to other types of work machines including, for example, wheel loaders and dump trucks, and similar effects can be obtained. In this way, the present invention can be applied to various work machines in which a removal device removes dust from the cooling air flowing to a heat exchanger.

[0056] The above-described embodiments are illustrative examples of the present invention, and are not intended to limit the scope of the present invention to these embodiments. Those skilled in the art can implement the present invention in various other forms without departing from the gist of the present invention. [Explanation of symbols]

[0057] 1,100 Hydraulic excavators 2 Lower running body (main body) 3 Upper rotating body (main body) 4 Work equipment 10,10-1 Engine room 11 Opening and closing cover 20 Hydraulic Pump 21 Engine 22 Cooling fan 23 Heat exchanger 30 Storage Case 33 Discharge space 34 Outlet 35 Cleaning Window 35a Cleaning port 35b Lid body 36 Bottom part 37 Top part 40 Removal device 41 First cylinder 50 Second cylinder 60 Warning device 61 Controller 62 Proximity sensor (detection sensor) 63 Monitor (alarm device)

Claims

1. The main body, A working device attached to the main body; a cooling fan that is accommodated inside an engine compartment provided in the main body and guides cooling air; a heat exchanger that is arranged upstream of the cooling fan with respect to the flow of the cooling air and exchanges heat with the cooling air; a removal device that is arranged upstream of the heat exchanger with respect to the flow of the cooling air and changes the cooling air into a swirling flow and removes dust contained in the swirling flow by centrifugal force; and a storage case that houses the removal device and forms a discharge space into which dust is discharged from the removal device, the storage case has a discharge port for discharging dust from the discharge space, and a cleaning window that is opened or closed by a lid and is opened when cleaning the discharge space to allow air to be blown into the discharge space, The cleaning window is arranged in a position opposite the discharge outlet with the discharge space and the multiple removal devices interposed therebetween, and a distance from the discharge outlet to the removal devices is greater than a distance from the cleaning window to the removal devices.

2. 2. The work machine according to claim 1, the discharge port is provided on a bottom surface of the storage case that is located below the removal device and forms the discharge space, A work machine characterized in that the cleaning window is provided on an upper surface of the storage case that is located above the removal device and forms the discharge space.

3. 3. The working machine according to claim 1 or 2, A detection sensor that detects the opening of the cleaning window; a notification device that notifies the user that the cleaning window is open when the detection sensor detects that the cleaning window is open.

4. 3. The working machine according to claim 1 or 2, the engine compartment has an opening / closing cover that moves between a closed position that covers the cleaning window and an open position that exposes the cleaning window, A work machine characterized in that the cleaning window has a cleaning port that opens into the discharge space, and a cover that moves to a closed position that closes the cleaning port and an open position that opens the cleaning port and prevents the opening / closing cover from moving to the closed position.

Images