Work machine

Abstract

To provide a work machine that can avoid a sudden decrease in cooling performance.SOLUTION: A work machine includes: a heat exchanger; a fan configured to generate a flow current passing through the heat exchanger; a machine main body forming a first machine room in which the heat exchanger and the fan are accommodated; and a first filter, the inside of which has a hollow protruded shape. The machine main body includes a first exterior panel part forming a first external opening of the first machine room. The first filter closes the first external opening while protruding from the first exterior panel part to the first machine room. The hollow part may be opened to the first exterior panel part, and a second filter covering the opening of the hollow part in the first filter may be further provided.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a work machine.

Background Art

[0002] Citation Document 1 discloses a work machine provided with an intake port that sucks cooling air into an equipment storage chamber of a building cover, and a dust-proof net that covers the intake port.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when dust adheres to the dust-proof net and becomes clogged, the cooling function for the high-temperature part in the equipment storage chamber rapidly deteriorates. For this reason, for example, when the intake port and the dust-proof net are installed at a high position from the ground, it becomes difficult to check the clogged state, and a significant deterioration of the cooling function is likely to occur. Therefore, it can also cause overheating of the high-temperature part.

[0005] Therefore, on one aspect, an object of the present invention is to provide a work machine capable of avoiding a rapid deterioration of the cooling function.

Means for Solving the Problems

[0006] On one aspect, a heat exchanger, a fan that generates an air flow passing through the heat exchanger, a machine body part that forms a first machine chamber for housing the heat exchanger and the fan, and a first filter having a convex shape with a hollow interior are provided, the machine body part has a first exterior panel part that forms a first external opening of the first machine chamber, A working machine is provided in which the first filter protrudes from the first exterior panel portion into the first machine room while closing the first external opening.

Effects of the Invention

[0007] According to the present disclosure, a rapid decline in the cooling function can be avoided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 1A

Figure 1B

Figure 1C

Figure 1D

Figure 2

Figure 2A

Figure 3

Figure 4

Figure 5

Figure 5A

Figure 5B

Figure 6

Figure 7

Figure 8

Figure 8A

Mode for Carrying Out the Invention

[0009] Hereinafter, each embodiment will be described with reference to the accompanying drawings.

[0010] FIG. 1 is a perspective view showing the working machine of this embodiment, FIG. 1A is a front view showing the machine main body part, FIG. 1B is a diagram showing the arrangement in the first machine room viewed from the left in FIG. 1A, FIG. 1C is a diagram showing the arrangement of the first machine room and the second machine room viewed from above in FIG. 1A, FIG. 1D is a perspective view showing a state in which the first exterior panel part and the second exterior panel part are opened, and FIGS. 2, 2A, and 3 are perspective views showing the first exterior panel part to which the first filter and the second filter are attached.

[0011] As shown in FIGS. 1 to 3, the working machine of this embodiment includes a self - propelled crawler - type lower traveling body U (FIG. 1) and a machine main body part 1 attached to the lower traveling body U. The machine main body part 1 forms a first machine room R1 and a second machine room R2 which are partitioned from each other by a partition wall P (FIG. 1C). Note that the configuration of the working machine to which the present disclosure is applied is arbitrary and is not limited to, for example, those having a traveling body.

[0012] As shown in FIGS. 1B and 1C, in the first machine room R1, a high - temperature part such as an engine (not shown), a heat exchanger 101 for cooling the high - temperature part, and a fan 102 for generating an air flow passing through the heat exchanger 101 are accommodated. The heat exchanger 101 includes a radiator, an after - cooler, an air - conditioner condenser, an oil cooler, a fuel cooler, etc.

[0013] The machine main body part 1 includes a first exterior panel part 10 that forms a first external opening 1A of the first machine room R1. The first exterior panel part 10 has an outer frame part 11 around the first external opening 1A.

[0014] The first external opening 1A functions as an air intake for taking in air drawn in by the fan 102 from the outside. The entire first external opening 1A is blocked by a first filter 20 having a convex shape with a hollow interior. The first filter 20 blocks the first external opening 1A while the convex portion thereof protrudes from the first exterior panel portion 10 toward the first machine room R1, and the hollow of the first filter 20 opens toward the outside of the machine body, that is, opens on the side of the first exterior panel portion 10. The opening of the hollow is a portion that demarcates between the internal space (space related to the hollow) of the first filter 20 and the external space, and is synonymous with the opening of the first filter 20. The opening of the hollow of the first filter 20 is covered by a second filter 40 that is coarser than the first filter 20. The second filter 40 is detachable from the first exterior panel portion 10 or the first filter 20.

[0015] The first filter 20 is fixed to or detachably attached to the first exterior panel portion 10, and the first exterior panel portion 10 is capable of opening and closing the first external opening 1A by rotating around the first rotation axis 12 (FIG. 1A).

[0016] The first filter 20 has an opposing surface portion 22 that faces the fan 102 in a direction intersecting the vertical direction. Further, the first filter 20 has four side surface portions 23a, 23b, 23c, 23d that are continuous from the outer periphery of the opposing surface portion 22 and extend along a surface that is inclined or orthogonal to the opposing surface portion 22. In this embodiment, an example is shown in which the side surface portions 23a, 23b, 23c, 23d are inclined with respect to the opposing surface portion 22, but all or a part of the side surface portions 23a, 23b, 23c, 23d may be orthogonal to the opposing surface portion 22.

[0017] Next, each part of the first external opening 1A and the first filter 20 and their positional relationships will be described.

[0018] The first external opening 1A has an upper opening edge portion 14a, a lower opening edge portion 14b, a left opening edge portion 14c, and a right opening edge portion 14d in a front view (corresponding to FIG. 1A) when viewed from the outside of the machine main body 1 (FIGS. 1D, 2, 2A, 3).

[0019] Also, the opposing surface portion 22 of the first filter 20 has an upper edge portion 22a, a lower edge portion 22b, a left edge portion 22c, and a right edge portion 22d in a front view when viewed from the outside of the machine main body 1 (FIGS. 1D, 2A, 3).

[0020] Here, the upper edge portion 22a of the opposing surface portion 22 is located closer to the center side of the first external opening 1A than the upper opening edge portion 14a. The lower edge portion 22b of the opposing surface portion 22 is located closer to the center side of the first external opening 1A than the lower opening edge portion 14b. The left edge portion 22c of the opposing surface portion 22 is located closer to the center side of the first external opening 1A than the left opening edge portion 14c. The right edge portion 22d of the opposing surface portion 22 is located closer to the center side of the first external opening 1A than the right opening edge portion 14d. Note that all or part of the upper edge portion 22a, the lower edge portion 22b, the left edge portion 22c, and the right edge portion 22d may be provided at positions overlapping the opening edge portion 14a, the opening edge portion 14b, the opening edge portion 14c, and the opening edge portion 14d, respectively.

[0021] Also, as described above, the first filter 20 has an upper side surface portion 23a, a lower side surface portion 23b, a left side surface portion 23c, and a right side surface portion 23d.

[0022] Here, the upper side surface portion 23a extends between the upper opening edge portion 14a of the first external opening 1A and the upper edge portion 22a of the opposing surface portion 22. The lower side surface portion 23b extends between the lower opening edge portion 14b of the first external opening 1A and the lower edge portion 22b of the opposing surface portion 22. The left side surface portion 23c extends between the left opening edge portion 14c of the first external opening 1A and the left edge portion 22c of the opposing surface portion 22. The right side surface portion 23d extends between the right opening edge portion 14d of the first external opening 1A and the right edge portion 22d of the opposing surface portion 22.

[0023] Further, the machine main body 1 includes a second exterior panel portion 30 that opens and closes the second machine chamber R2. The second exterior panel portion 30 is disposed adjacent to the first exterior panel portion 10. The second machine chamber R2 can be opened and closed by rotating the second exterior panel portion 30 about a second rotation axis 31 (FIG. 1A) through an operation on an operation portion 32 provided on the second exterior panel portion 30.

[0024] FIG. 4 is a view showing the engagement state between the first exterior panel portion and the second exterior panel portion.

[0025] The first exterior panel portion 10 is held in the closed position by engaging with the second exterior panel portion 30 when the second exterior panel portion 30 is in the closed position.

[0026] As shown in FIGS. 2, 2A, 3, and 4, a plate-shaped engaging portion 15 extending leftward in FIG. 4 is formed on the first exterior panel portion 10. This engaging portion 15 engages with the right end portion 33 of the second exterior panel portion 30 and is pressed upward in FIG. 4, whereby the first exterior panel portion 10 is held in the closed position. An engaging portion 32a (FIG. 4) is provided on the operation portion 32 of the second exterior panel portion 30, and the second exterior panel portion 30 is held in the closed position by the engaging portion 32a engaging with a predetermined portion.

[0027] On the one hand, when the second exterior panel portion 30 is in the open position or the like, the first exterior panel portion 10 can be rotated to the open position in a state where the engagement at the engagement portion 15 is disengaged. Here, no operating portions such as catches or handles for opening and closing are provided on the outer frame portion 11 of the first exterior panel portion 10. Therefore, the area of the outer frame portion 11 can be suppressed, and the area of the first external opening 1A or the area of the first filter 20 can be enlarged. Thereby, the cooling effect of the high-temperature portion can be enhanced. Note that the first exterior panel portion 10 may be temporarily fixed in the closed state by a temporary fixing tool smaller than the catch provided on the second exterior panel portion 30. The temporary fixing tool may include an attachment portion attached to the first exterior panel portion 10 and an engagement portion attached to the machine main body portion 1. In this case, for example, a protrusion that is inserted between a pair of rollers provided on the engagement portion is formed on the attachment portion, and when the first exterior panel 10 is in the closed position, the protrusion engages with the pair of rollers, and the first exterior panel 10 may be locked.

[0028] In addition, the first exterior panel portion 10 has a first rotation axis 12 on the side opposite to the side adjacent to the second exterior panel portion 30, and the second exterior panel portion 30 has a second rotation axis 31 on the side opposite to the side adjacent to the first exterior panel portion 10. Therefore, when the second exterior panel portion 30 is in the open position, the first exterior panel portion 10 can be opened by inserting a hand from the side of the second exterior panel portion 30, gripping the first exterior panel portion 10, and rotating it. That is, in this embodiment, although no operating portions such as catches or handles for opening and closing are provided on the first exterior panel portion 10, the first exterior panel portion 10 can be opened by opening the second exterior panel portion 30.

[0029] In this embodiment, the first filter 20 has a facing surface portion 22 and four side surface portions 23a, 23b, 23c, and 23d. Therefore, first, dust or the like accumulates on the facing surface portion 22 that opposes the fan. However, thereafter, intake air can also be drawn in from the side surface portions 23a, 23b, 23c, and 23d. For this reason, a rapid decline in the cooling function is avoided, and overheating of the high-temperature portion in the first machine room R1 can be prevented. Further, the first filter 20 can be easily cleaned by opening the first exterior panel portion 10. As a specific cleaning procedure, for example, by opening the first exterior panel 10 and blowing air onto the first filter 20, dust or the like adhering to the first filter 20 can be blown off and discharged through the second filter 40. At this time, dust or the like adhering to the second filter 40 can also be removed simultaneously.

[0030] Note that by making the first filter 20 removable from the first exterior panel portion 10, cleaning and replacement of the first filter 20 become easy. Further, each of the facing surface portion 22 and the side surface portions 23a, 23b, 23c, and 23d of the first filter 20 may be made removable. Thereby, cleaning and replacement of each part of the first filter 20 become easy.

[0031] In this embodiment, instead of the side surface portion 23b, a plate member that does not allow liquid to pass through may be arranged at the same position. In this case, it is arranged below the first filter in the first machine room R1, and intrusion of liquid into electrical equipment such as the battery 80 (FIG. 1B) that faces the plate member in the vertical direction can be prevented. Further, since liquid such as rainwater is discharged along the inclined plate member with the side closer to the first external opening 1A being downward, intrusion of liquid into the first machine room R1 can be suppressed. Furthermore, when the second filter 40 is removed, dust or the like captured by the first filter 20 can be easily discharged along the plate member.

[0032] Further, a plate member that does not allow liquid to pass through may be provided below the side surface portion 23b. Also in this case, intrusion of water or the like into the first machine room R1 can be suppressed. Thus, by providing a plate member that suppresses intrusion of liquid, intrusion of liquid into electrical equipment such as a battery that is arranged below the first filter in the first machine room R1 and faces the plate member in the vertical direction can be prevented.

[0033] Also, by using the second filter 40 with a coarser mesh than the first filter 20, large dust is removed by the second filter 40. Therefore, the finer first filter 20 can gain time until it gets clogged.

[0034] Figs. 5 to 5B are diagrams showing modified examples of the first filter.

[0035] The first filter 20A shown in Fig. 5 is cylindrical with a hollow interior, and the side of the exterior panel portion 10 is open. The first filter 20A includes an opposing surface portion 22A that faces the fan 102 in a direction intersecting the vertical direction, and a cylindrical side surface portion 23A that is continuous from the outer periphery of the opposing surface portion 22A.

[0036] In such a first filter 20A, first, dust and the like clog the opposing surface portion 22A that opposes the fan, but thereafter, intake air can still be drawn in from the side surface portion 23A. Therefore, a sudden decrease in the cooling function is avoided, and overheating of the high-temperature part in the first machine room R1 can be prevented.

[0037] The first filter 20B shown in Fig. 5A has a shape cut along the axis of a cylinder, has a hollow interior, and the side of the exterior panel portion 10 is open. The first filter 20B includes an opposing surface portion 22B that faces the fan 102 in a direction intersecting the vertical direction, a curved side surface portion 23B that is continuous from the outer periphery of the opposing surface portion 22B, and a planar side surface portion 24B.

[0038] In such a first filter 20B, first, dust and the like clog the opposing surface portion 22B that opposes the fan, but thereafter, intake air can still be drawn in from the side surface portion 23B and the side surface portion 24B. Therefore, a sudden decrease in the cooling function is avoided, and overheating of the high-temperature part in the first machine room R1 can be prevented.

[0039] The first filter 20C shown in Fig. 5B is composed of two filters 25 having a convex shape with a hollow interior. Each filter 25 has a shape and function similar to those of the first filter 20.

[0040] FIG. 6 is a diagram showing an example in which a member that does not allow liquid to pass through is arranged near the first filter.

[0041] In the example shown in FIG. 6, a plate member 61 having an L-shaped cross section is installed near the first filter 20. Thereby, it is possible to prevent the intrusion of liquid into the electrical equipment in the first machine room R1 installed below the plate member 61. In this case, a drain hole 62 or a drain hole 63 for draining rainwater or the like that has penetrated up to the position of the plate member 61 may be provided. In the example of FIG. 6, rainwater or the like can be discharged from the side surface of the machine main body 1 through the drain hole 62 and from the bottom surface of the machine main body 1 through the drain hole 63, respectively. Note that the drain hole 62 or the drain hole 63 may also be used as a path for discharging dust or the like captured by the first filter 20. In this case, it is possible to discharge dust or the like without removing the second filter 40.

[0042] FIG. 7 is a diagram showing an example in which a duct is provided in a partition wall.

[0043] In the present embodiment, an air intake port may be formed in the second exterior panel portion 30 that constitutes the second machine room R2, and this air intake port may be blocked by a filter (the filter on the second machine room R2 side). In this case, as shown in FIG. 7, by providing a duct D in the partition wall P, it becomes possible to take in outside air from the air intake holes formed in the second exterior panel portion 30. In this case, the first filter 20 will be clogged with dust or the like first, but thereafter, it is still possible to intake air through the filter on the second machine room R2 side and the duct D. Therefore, even if the first filter 20 becomes clogged, a certain degree of cooling function can be maintained.

[0044] In the present embodiment, as an operation mode of the fan 102, a normal rotation mode during cooling and a reverse air flow mode in which the direction of the air flow is opposite to that of the normal rotation mode may be provided. In this case, the mode may be switched by changing the rotation direction of the fan 102, or the mode may be switched by changing the direction of the blades provided on the fan 102.

[0045] FIG. 8 and FIG. 8A are diagrams showing an example of changing the direction of the blades provided on the fan. FIG. 8 is a front view of the fan, and FIG. 8A is a side view of the fan.

[0046] In the fan 102 shown in FIGS. 8 and 8A, blades 72a to 72d are attached to a rotor 71 that rotates around a rotation axis 70. As shown in FIG. 8A, by changing the angles of the blades 72a to 72d, the direction of the air flow can be reversed while maintaining the rotation direction of the rotor 71. Note that in FIG. 8A, only the blade 72a is shown, but the same applies to the blades 72b to 72d.

[0047] When the reverse air flow mode is provided, the first filter 20 can be cleaned by the reverse air flow mode. That is, with the second filter 40 removed, by operating the fan 102 in the reverse air flow mode, dust and the like attached to the first filter 20 can be discharged to the outside. Alternatively, the fan 102 may be operated in the reverse air flow mode with the second filter 40 attached. In this case, dust and the like attached to the first filter 20 can be discharged through the second filter 40 that is coarser than the first filter 20, and dust and the like attached to the second filter 40 can be blown off at the same time. In these cases, by installing a filter at the exhaust port (the exhaust port for discharging air during cooling) formed in the first machine room R1, it is possible to prevent dust and the like from entering (flowing back) from the exhaust port during cleaning. Note that as the filter installed at the exhaust port, a filter having the same form as the first filter 20 may be used.

[0048] In this way, by providing the reverse air flow mode, the first filter 20 can be easily cleaned. For example, in a working machine equipped with a self-propelled crawler-type lower traveling body U and having a machine main body 1 attached to the upper part of the lower traveling body U, the first filter 20 will be arranged at a high position from the ground. Therefore, it becomes difficult to check how much dust and the like is attached to the first filter 20, and the workability of the cleaning work deteriorates. However, for example, when an operator instructs the reverse air flow mode, regularly, or when adhesion of dust and the like is detected by a sensor, by performing cleaning in the reverse air flow mode, a decline in the cooling function can be prevented without requiring complicated work.

[0049] As described above, in this embodiment, the first filter 20 has a facing surface portion 22 and four side surface portions 23a, 23b, 23c, and 23d. Therefore, first, dust and the like clog the facing surface portion 22 that opposes the fan, but thereafter, intake can also be performed from the side surface portions 23a, 23b, 23c, and 23d. For this reason, a rapid decline in the cooling function is avoided, and overheating of the high-temperature part in the first machine room R1 can be prevented.

[0050] Although the embodiments have been described in detail above, the present invention is not limited to specific embodiments, and various modifications and changes are possible within the scope described in the claims. Also, it is possible to combine all or a plurality of the constituent elements of the above-described embodiments.

Explanation of Reference Numerals

[0051] 1 Machine main body 1A First external opening 10 First exterior panel part 11 Outer frame part 20 First filter 22 Facing surface portion 22a Upper edge portion 22b Lower edge portion 22c Left edge portion 22d Right edge portion 23a Upper side surface portion 23b Lower side surface portion 23c Left side surface portion 23d Right side surface portion 30 Second exterior panel part 40 Second filter 101 Heat exchanger 102 Fan R1 First machine room R2 Second machine room U Lower traveling body

Claims

1. A heat exchanger, a fan that generates an air flow passing through the heat exchanger, a machine body portion that forms a first machine room for housing the heat exchanger and the fan, and a first filter having a convex shape with a hollow interior, wherein the machine body portion has a first exterior panel portion that forms a first external opening of the first machine room, and the first filter protrudes from the first exterior panel portion into the first machine room and closes the first external opening, a working machine.

2. The hollow has an opening on the side of the first exterior panel portion, and the working machine according to Claim 1, further comprising a second filter that covers the opening of the hollow in the first filter.

3. The second filter is coarser than the first filter, the working machine according to Claim 2.

4. Electrical equipment housed in the first machine room and disposed below the first filter, and a plate member provided in a manner to cover the lower side surface portion of the first filter or provided in a manner to replace the lower side surface portion of the first filter and not allowing liquid to pass through, wherein the plate member faces the electrical equipment in the vertical direction, the working machine according to Claim 1.

5. The plate member is inclined in a manner such that the side closer to the first external opening is downward, the working machine according to Claim 4.

6. The first filter is fixed to or detachably attached to the first exterior panel portion, and the first exterior panel portion is openable and closable by rotating around a first rotation axis, the working machine according to Claim 1.

7. The machine body portion further forms a second machine room adjacent to the first machine room and further has a second exterior panel portion for opening and closing the second machine room, wherein the second exterior panel portion is disposed adjacent to the first exterior panel portion and is openable and closable by rotating around a second rotation axis, and the first exterior panel portion is held in the closed position by engaging with the second exterior panel portion when the second exterior panel portion is in the closed position and is rotatable to the open position when the second exterior panel portion is in the open position, the working machine according to Claim 6.

8. The first exterior panel portion has an outer frame portion around the first external opening, the first filter closes the entire first external opening, and the outer frame portion is not provided with an opening / closing catch and a handle, the working machine according to Claim 7.

9. The first exterior panel portion has the first rotation axis on the side opposite to the side adjacent to the second exterior panel portion, The second exterior panel part has the second rotation axis on the side opposite to the side adjacent to the first exterior panel part. The work machine according to claim 8, wherein the second exterior panel part is provided with an opening / closing catch and a handle.

10. The first filter has a facing surface facing the fan in a direction intersecting the vertical direction, and one or more side surfaces continuous from the outer periphery of the facing surface and along a surface inclined or orthogonal to the facing surface. The work machine according to claim 1.

11. The first external opening has an upper opening edge, a lower opening edge, a left opening edge, and a right opening edge in a front view seen from the outside of the machine body part. The facing surface, in a front view seen from the outside of the machine body part, has an upper edge overlapping the upper opening edge or located closer to the center of the first external opening than the upper opening edge, a left edge overlapping the left opening edge or located closer to the center of the first external opening than the left opening edge, and a right edge overlapping the right opening edge or located closer to the center of the first external opening than the right opening edge. The work machine according to claim 10, wherein the one or more side surfaces include an upper side surface extending between the upper opening edge of the first external opening and the upper edge of the facing surface, a left side surface extending between the left opening edge of the first external opening and the left edge of the facing surface, and a right side surface extending between the right opening edge of the first external opening and the right edge of the facing surface.

12. The fan operates in a selected one of a plurality of operation modes. The plurality of operation modes include a normal rotation mode and a reverse air flow mode in which the direction of the air flow is opposite to that of the normal rotation mode. The work machine according to any one of claims 1 to 11.

13. The work machine according to claim 12, wherein the first external opening forms an intake port in the normal rotation mode. ​

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