Work machines and platforms

Abstract

To provide a work machine capable of removing a hydraulic pump while a frame for supporting an exhaust gas treatment device is attached to the work machine, and a technology related thereto.SOLUTION: A work machine includes a hydraulic pump 3 connected to an engine, a frame 5 including legs 51 and a top plate 53 on which the legs 51 are supported, and an exhaust gas treatment device mounted on the top plate 53. The hydraulic pump 3 is arranged below the top plate 53 so that the axial direction extends from the center side of the machine to the outside of the machine. The top plate 53 is formed with an elongated slit 55 that extends along the axial direction of the hydraulic pump 3 and penetrates in the vertical direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a work machine and related technology. [Background technology]

[0002] Conventionally, among working machines such as hydraulic excavators, there are some that are equipped with an exhaust gas treatment device that treats exhaust gas from an engine. For example, Patent Document 1 discloses a hydraulic excavator (1) equipped with an exhaust gas treatment device (18). The hydraulic excavator (1) also includes an engine (8) and a hydraulic pump (13) in addition to the exhaust gas treatment device (18).

[0003] As shown in Figures 5 to 7 of Patent Document 1, a support member (17) is disposed above the hydraulic pump (13). The support member (17) is composed of a fixing portion (17A), a mounting portion (17B), and an additional fixing portion (17C). The fixing portion (17A) is fixed to the flange portion (14) of the hydraulic pump (13). An exhaust gas treatment device (18) is mounted on the mounting portion (17B). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5579453 Summary of the Invention [Problem to be solved by the invention]

[0005] However, a hydraulic pump connected to an engine may be damaged in the field (work site). In such a case, the hydraulic pump must be removed from the work machine in order to repair or replace it.

[0006] In this regard, in the above-mentioned Patent Document 1, when removing the hydraulic pump (13), it is necessary to remove both the exhaust gas treatment device (18) and the support member (17).

[0007] However, since removing the support member (17) that supports the exhaust gas treatment device (18) requires relatively large-scale equipment such as an overhead crane, it is difficult to perform replacement work in the field. Therefore, the hydraulic excavator (1) needs to be transported to a repair shop temporarily, which causes a problem of stopping field work.

[0008] SUMMARY OF THE PRESENT DISCLOSURE In view of the above, an object of the present invention is to provide a work machine and related technology that enable the hydraulic pump to be removed while the frame remains attached to the work machine. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the present invention provides a work machine comprising an engine arranged inside a machine room of the work machine, a hydraulic pump connected to the engine, a stand including legs and a top plate supported on the legs, and an exterior panel that constitutes the machine room, wherein the hydraulic pump is arranged below the top plate, and a slit for attaching and detaching the hydraulic pump is formed in the top plate, the slit penetrating vertically and extending from inside the machine room toward the exterior panel.

[0010] Here, it is preferable that the hydraulic pump is disposed so that the axial direction extends from the center of the machine to the outside of the machine, and that the slit extends along the axial direction.

[0011] In addition, it is preferable that a gutter member be provided below the slit, the gutter member inclining downward from the center of the machine toward the outside of the machine.

[0012] It is also preferable that the slit is formed at a position that overlaps with the center of gravity of the hydraulic pump in the vertical direction.

[0013] Furthermore, it is preferable that the end of the slit on the machine center side is disposed at a position that overlaps with the center of gravity of the hydraulic pump in the vertical direction.

[0014] The slit is preferably a notched slit formed continuously to the outer end of the top plate.

[0015] Furthermore, it is preferable that the slit includes a first slit and a second slit extending along the axial direction and penetrating in the vertical direction, and the second slit is spaced apart from the first slit and arranged approximately parallel to the first slit.

[0016] Here, it is preferable that the region between the first slit and the second slit is disposed at a position overlapping with the center of gravity of the hydraulic pump in the vertical direction.

[0017] The present invention also provides a stand comprising legs and a top plate supported by the legs, a hydraulic pump connected to an engine arranged inside a machinery room of a work machine is provided on the underside of the top plate, and a slit for attaching and detaching the hydraulic pump is formed in the top plate, the slit penetrating vertically and extending from the inside of the machinery room toward an exterior panel that constitutes the machinery room. Effect of the Invention

[0018] According to the present invention, a slit for attaching and detaching the hydraulic pump is formed in the top plate of the stand, the slit penetrating vertically and extending from the inside of the machine room toward the exterior panel. Therefore, a lifting wire can be inserted through the slit, and the hydraulic pump can be lifted without removing the stand. Therefore, the hydraulic pump can be removed while the stand is attached to the work machine. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing a part (upper rotating body) of a hydraulic excavator according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing the right rear interior of a machine room of the hydraulic excavator. [Diagram 3] 3 is a perspective view showing a state in which an exhaust gas treatment device is removed from the perspective view of FIG. 2. [Figure 4] FIG. 4 is a perspective view showing a hydraulic pump installed under the stand. [Diagram 5] FIG. [Figure 6] FIG. 4 is a plan view showing a right rear portion of the machine room with the exhaust gas treatment device removed. [Figure 7] FIG. 7 is a plan view showing the position of the center of gravity of the hydraulic pump in the plan view of FIG. 6. [Figure 8] FIG. 2 is a plan view showing the hydraulic pump pulled out to the side (right side) of the machine. [Figure 9] FIG. 11 is a perspective view showing a state in which a rain gutter member according to a modified example is attached to the lower side of a slit. [Figure 10] 1A is a plan view and FIG. 1B is a side view showing a rain gutter member. [Figure 11] FIG. 11 is a schematic plan view showing two slits according to a modified example. [Figure 12] FIG. 11 is a schematic plan view showing a notch-shaped slit according to a modified example. [Figure 13] 5A and 5B are a schematic plan view and a schematic side view showing a state in which a plate is attached to an end portion of a notch-shaped slit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] <1. Embodiment> A working machine and an exhaust gas treatment device frame according to an embodiment of the present invention will be described with reference to Fig. 1 to Fig. 8. In the following, a hydraulic excavator 1 shown in Fig. 1 is illustrated as an example of a working machine, and a frame 5 shown in Fig. 5 is illustrated as an example of an exhaust gas treatment device frame. In each drawing, the front-rear direction of the machine and the left-right direction of the machine are defined as necessary.

[0021] As shown in FIG. 1, a hydraulic excavator 1 includes a lower traveling structure (not shown) and an upper rotating structure 2 rotatably provided on the lower traveling structure.

[0022] The upper rotating body 2 is configured to include a cab 21, a machine room 23, and a counterweight 25. Although not shown in the figure, a work attachment is attached to the side of the cab 21.

[0023] As shown in FIGS. 2 to 4, a hydraulic pump 3 (FIG. 4), a stand 5 (FIGS. 3 and 4), and an exhaust gas treatment device (urea SCR system) 7 (FIG. 2) are provided inside the right rear portion of the machine room 23.

[0024] 2, the exhaust gas treatment device 7 is placed on the stand 5, supported by the stand 5, and installed on the upper side of the stand 5. In addition, as shown in FIG. 4, the hydraulic pump 3 is installed on the lower side of the stand 5.

[0025] The hydraulic pump 3 is connected to an engine (not shown) provided approximately in the center of the machine room 23. The hydraulic pump 3 is rotationally driven by the engine, and discharges hydraulic oil to a hydraulic actuator mounted on the hydraulic excavator 1.

[0026] 4, the hydraulic pump 3 is provided so that its axial direction coincides with the machine width direction (left-right direction). In other words, the hydraulic pump 3 is disposed so that its axial direction extends from the center of the machine to the outside of the machine.

[0027] The stand 5 is a frame for mounting the exhaust gas treatment device 7. Specifically, as shown in Fig. 5, the stand 5 is configured to include a plurality of legs 51 and a top plate 53 supported by the plurality of legs 51.

[0028] 5 and 6, the top plate 53 is formed with an elongated slit 55 that extends in the machine width direction (left-right direction) and penetrates vertically. The slit 55 is used for attaching and detaching the hydraulic pump 3, and extends from the inside of the machine chamber 23 toward the side cover 23L when the side cover 23L (one example of an exterior panel according to the present invention) shown in FIG. 6 is in a closed state. In particular, in this embodiment, since the axial direction of the hydraulic pump 3 coincides with the machine width direction, the slit 55 is formed to extend along the axial direction of the hydraulic pump 3.

[0029] 6, the slit 55 is formed at a position that overlaps with the hydraulic pump 3 in the vertical direction. More specifically, as shown in Fig. 7, the slit 55 is formed so that an end of the slit 55 on the machine center side overlaps with the center of gravity CT of the hydraulic pump 3 in the vertical direction.

[0030] Next, a method for removing the hydraulic pump 3 from the hydraulic excavator 1 will be described with reference to FIGS.

[0031] First, a wire for a UNIC crane (not shown) is passed from top to bottom along the machine center side end of the slit 55. This makes it possible to pass the wire for the UNIC directly above the center of gravity CT (see FIG. 7) of the hydraulic pump 3.

[0032] Next, a sling (not shown) is hung on the hydraulic pump 3 and the sling is connected to a UNIC wire passed directly above the center of gravity CT of the hydraulic pump 3.

[0033] Then, the hydraulic pump 3 is lifted up using a UNIC wire and a sling and moved from the center of the machine to the right side of the machine. As a result, the hydraulic pump 3 is pulled out to the outside (right side) of the machine as shown in Fig. 8. At that time, the side cover 23L is in an open state.

[0034] In the state shown in Figure 8, the UNIC wire and sling attached to the hydraulic pump 3 via the slit 55 are temporarily removed. Then, the UNIC wire and sling are attached to the portion of the hydraulic pump 3 that is pulled out to the right side of the machine, the hydraulic pump 3 is lifted, and then pulled out further to the right, whereby the hydraulic pump 3 is removed.

[0035] According to the embodiment described above, the slit 55, which penetrates in the vertical direction and extends from the inside of the machine room 23 toward the side cover 23L, is formed in the top plate 53 of the frame 5. Particularly in this embodiment, the slit 55 extends along the axial direction of the hydraulic pump 3.

[0036] Therefore, a wire for a UNIC crane (a lifting wire) can be inserted through the slit 55, and the hydraulic pump 3 can be lifted without removing the frame 5 from the hydraulic excavator 1. In other words, the hydraulic pump 3 can be removed while the frame 5 supporting the exhaust gas treatment device 7 remains attached to the hydraulic excavator 1. As a result, the time required for repair and replacement work of the hydraulic pump 3 can be significantly shortened.

[0037] Furthermore, according to the embodiment described above, the slit 55 overlaps with the hydraulic pump 3 in the vertical direction as shown in Fig. 6. In particular, in the embodiment described above, the machine center side end of the slit 55 overlaps with the center of gravity CT of the hydraulic pump 3 in the vertical direction as shown in Fig. 7.

[0038] Therefore, the hydraulic pump 3 can be lifted near the center of gravity by passing a UNIC crane wire from top to bottom along the machine center side end of the slit 55. As a result, the hydraulic pump 3 can be stably lifted and moved.

[0039] <2. Modifications> The work machine and the exhaust gas treatment device stand according to the present invention are not limited to the above-described embodiment, and various modifications and improvements are possible within the scope of the claims.

[0040] For example, in the above-described embodiment, as shown in Fig. 5, a case where nothing is provided below the slit 55 is illustrated, but the present invention is not limited to this. As shown in Fig. 9, a gutter member 6 may be provided below the slit 55.

[0041] 9 and 10(A), the gutter member 6 has a V-shaped recess 61 for directing rainwater, etc., from the center of the machine to the outside of the machine. As shown in Fig. 10(B), the recess 61 is inclined downward from the center of the machine toward the outside of the machine (right side).

[0042] According to the above-described modified example, the gutter member 6 provided below the slit 55 can prevent water entering through the slit 55 due to rainfall or washing the car from getting onto the hydraulic pump 3. In addition, since the gutter member 6 has the recess 61 that slopes downward toward the outside of the machine, the water entering through the slit 55 can be drained to the outside (right side) of the machine.

[0043] In addition, according to the above-described embodiment, as shown in Fig. 6, a case where one slit 55 is formed in the top plate 53 of the gantry 5 has been exemplified, but the present invention is not limited to this. As shown in Fig. 11, two slits 551, 552 may be formed in the top plate 53 of the gantry 5.

[0044] The two slits 551, 552 are each configured as an elongated hole-shaped slit that extends along the axial direction of the hydraulic pump 3 and penetrates in the vertical direction. The slits 551 and 552 are provided approximately parallel to each other and spaced apart from each other in the front-rear direction.

[0045] Also, as shown in FIG. 11, the two slits 551, 552 are formed in a position in the vertical direction where the area between the machine center side end of slit 551 and the machine center side end of slit 552 overlaps with the center of gravity CT of the hydraulic pump 3.

[0046] According to the above-described modified example, it is possible to pass a UNIC crane wire from both sides through the two slits 551, 552 and then hang a sling on the hydraulic pump 3, making it possible to lift the hydraulic pump 3 in a more stable condition.

[0047] In particular, according to the above-described modified example, the center of gravity CT of the hydraulic pump 3 is located in the region between the machine center side end of the slit 551 and the machine center side end of the slit 552 in the vertical direction. Therefore, by passing a UNIC crane wire from top to bottom along the machine center side ends of the slits 551 and 552, respectively, the hydraulic pump 3 can be lifted near the center of gravity. As a result, the hydraulic pump 3 can be lifted and moved more stably.

[0048] In the above embodiment, the elongated slit 55 (see FIG. 6) is illustrated as an example of the slit according to the present invention, but the present invention is not limited to this, and the slit may be configured by a U-shaped notch slit 553 as shown in FIG. 12. The slit 553 is a slit that is continuously formed up to the outer (right) end of the top plate 53.

[0049] According to the above-mentioned modified example, the UNIC crane wire can be moved to the outside (right side) of the machine through the slit 553, so that the hydraulic pump 3 can be removed without replacing the UNIC crane wire or sling that has been installed.

[0050] As shown in FIG. 13, when the exhaust gas treatment device 7 is placed on the top plate 53, a plate 553P may be bolted on to the outer end of the slit 553 on the machine side in order to ensure strength.

[0051] In addition, in the above-described embodiment, as shown in FIG. 7, an example was given of the case where the center of gravity CT of the hydraulic pump 3 overlaps with the end of the slit 55 on the machine center side, but this is not limited to this, and the center of gravity CT of the hydraulic pump 3 may be configured to overlap near the center of the slit 55. [Industrial Applicability]

[0052] As described above, the work machine and the exhaust gas treatment device frame according to the present invention are suitable for attaching and detaching a hydraulic pump. [Explanation of symbols]

[0053] 1. Hydraulic excavator 2 Upper rotating body 3. Hydraulic pump 5 Mounting 6 Guttering materials 7 Exhaust gas treatment device 21 Cab 23 Machine room 25 Counterweight 51 Legs 53 Tabletop 55 Slit 61 Recess 551,552,553 Slit 553P Plate CT center of gravity

Claims

1. an engine disposed within a machine room of the work machine; a hydraulic pump connected to the engine; A stand including legs and a top plate supported by the legs; An exterior panel that constitutes the machine room; Equipped with The hydraulic pump is disposed below the top plate, a slit is formed in the top plate, the slit penetrating in a vertical direction and extending from the inside of the machine room toward the exterior panel, the slit being for inserting a lifting wire connected to the hydraulic pump through the slit to move the hydraulic pump, thereby attaching and detaching the hydraulic pump.

2. The hydraulic pump is disposed so that its axial direction extends from the center of the machine to the outside of the machine, The work machine according to claim 1 , wherein the slit extends along the axial direction.

3. 3. The work machine according to claim 2, wherein a gutter member is provided below the slit, the gutter member inclining downward from the center of the machine toward the outside of the machine.

4. 4. The work machine according to claim 1, wherein the slit is formed at a position that overlaps with a center of gravity of the hydraulic pump in the vertical direction.

5. 5. The work machine according to claim 4, wherein an end of the slit on the machine center side is disposed at a position overlapping with a center of gravity of the hydraulic pump in the vertical direction.

6. 6. The working machine according to claim 1, wherein the slit is a notch-shaped slit that is continuously formed in the top plate up to the outer end of the machine.

7. The slit includes a first slit and a second slit extending along an axial direction of the hydraulic pump and penetrating in the vertical direction, 2. The work machine according to claim 1, wherein the second slit is provided spaced apart from the first slit and substantially parallel to the first slit.

8. 8. The work machine according to claim 7, wherein the region between the first slit and the second slit is disposed at a position overlapping with a center of gravity of the hydraulic pump in the vertical direction.

9. A frame, The legs, A top plate supported by the legs; Equipped with A hydraulic pump connected to an engine disposed inside a machine room of the work machine is provided under the top plate, a slit is formed in the top plate, the slit penetrating vertically and extending from the inside of the machine room toward an exterior panel that constitutes the machine room, the slit being for inserting a lifting wire connected to the hydraulic pump through the slit to move the hydraulic pump, thereby attaching and detaching the hydraulic pump.

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