Construction Machinery

Abstract

To make it possible to apply a bonnet of an existing construction machine, and to ensure a strength of a bonnet spacer as an additional member closing an expanded part of a machine room.SOLUTION: A construction machine comprises: a front frame member 62c and a rear frame member 62d that partition a machine room 15 that accommodates an engine 90 and respectively extend in a width direction of an upper revolving structure 12; a first bonnet 30 and a second bonnet 40 that are disposed to be spaced apart from each other in the width direction of the upper revolving structure and cover an upper surface of the machine room; a bonnet spacer 50 that are arranged to be connected to the first bonnet and the second bonnet and cover the upper surface of the machine room between the first bonnet and the second bonnet; and a beam member 70 that connects the front frame member and the rear frame member above the engine. At least a part of the beam member is arranged at a position overlapping the bonnet spacer in plan view.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a construction machine. [Background technology]

[0002] In a conventional construction machine such as a hydraulic excavator that is composed of a lower traveling body and an upper rotating body, the rotating frame of the upper rotating body is rotatably mounted on the upper part of the lower traveling body. A machine room is provided above the rotating frame, and the machine room houses power machinery such as a hydraulic pump and an engine.

[0003] In recent years, as the size of the power machinery housed in the machinery room increases, the machinery room is sometimes expanded in the width direction of the upper rotating body. In this case, the bonnet covering the top surface of the machinery room must also be enlarged, but the problem of an increased weight is that the bonnet is enlarged.

[0004] In response to this, Patent Document 1 discloses a construction machine in which a bonnet covering the top surface of a machine room is divided into three parts in the width direction of an upper rotating body. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-69964 A Summary of the Invention [Problem to be solved by the invention]

[0006] In order to adapt the bonnet to changes in the width of the machine room, it is efficient and economical to share parts with existing construction machines. However, the construction machine described in Patent Document 1 does not assume that existing bonnets will be adapted to it.

[0007] In order to adapt the existing bonnet to a new construction machine with an expanded machine room, it is necessary to install additional parts to cover the expanded area. In this case, the width of the additional parts is smaller than that of the existing bonnet, so a new issue arises in that the strength must be ensured.

[0008] The present invention has been made in consideration of these points, and is applicable to the bonnets of existing construction machines, while ensuring sufficient strength for the bonnet spacer as an additional member that covers the expanded portion of the machine room. [Means for solving the problem]

[0009] In order to achieve the above object, in a first aspect of the present invention, A front frame member and a rear frame member each defining a machine room for accommodating an engine and extending in a width direction of the upper rotating body; A first bonnet and a second bonnet are arranged at an interval from each other in a width direction of the upper rotating body and cover an upper surface of the machine room; a bonnet spacer disposed adjacent to the first bonnet and the second bonnet and covering an upper surface of the machine chamber between the first bonnet and the second bonnet; a beam member connecting the front frame member and the rear frame member above the engine, The present invention is characterized in that at least a portion of the beam member is disposed at a position overlapping with the bonnet spacer in a plan view.

[0010] According to the above configuration, the first bonnet and the second bonnet are arranged at an interval in the width direction of the upper rotating body, so that a space is generated between the first bonnet and the second bonnet. In order to prevent the machine room from being exposed from this space, the bonnet spacer is arranged in connection with the first bonnet and the second bonnet to cover the upper surface of the machine room. Therefore, for example, the first bonnet and the second bonnet of an existing construction machine can be used as common parts with other construction machines with expanded machine rooms, and the expansion of the machine room can be compensated for by the bonnet spacer. In addition, a twisting force is applied to the front frame member and the rear frame member, but such relative displacement is suppressed by the beam member connecting the front frame member and the rear frame member. By arranging the bonnet spacer so as to overlap with the beam member, the strength of the bonnet spacer can be sufficiently ensured.

[0011] In the second invention, in the first invention, The bonnet spacer has an opening communicating with the inside of the machine room, and a small window that closes the opening and can be opened and closed.

[0012] According to the above-mentioned configuration, it is possible to secure a maintenance space for the power machinery such as the engine housed in the machinery compartment. Since it is not necessary to provide an opening and closing mechanism for the bonnet spacer, it is also possible to reduce costs.

[0013] In the third invention, in the second invention, At least one of the first bonnet and the second bonnet is configured to be openable and closable, and is characterized in that, in a closed state, it is positioned so as to overlap the upper side of the bonnet spacer and the small window.

[0014] According to the above configuration, at least one of the first bonnet and the second bonnet overlaps the upper side of the small window, thereby fixing the small window, eliminating the need to provide a locking mechanism for the small window, thereby reducing costs.

[0015] In a fourth aspect of the present invention, in the second or third aspect of the present invention, The beam member has a horizontal surface extending in the fore-and-aft direction of the upper rotating body and a vertical surface erected from the horizontal surface, and is characterized in that it has an internal opening at a position opposite the opening.

[0016] According to the above-mentioned configuration, when the small window is opened, the lower part of the beam member can be accessed through the internal opening, so that a larger maintenance space for the power machinery housed in the machinery room can be secured. In addition, since the vertical surface of the beam member acts as a reinforcing member, sufficient strength can be secured even if an internal opening is provided.

[0017] In the fifth aspect of the present invention, in the fourth aspect of the present invention, The vertical surface has a guide rail that guides at least one of the first bonnet and the second bonnet.

[0018] According to the above-mentioned configuration, the beam member is provided with the function of a guide rail, and the same part can be used for both purposes, thereby making it possible to reduce costs.

[0019] In a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, The bonnet spacer is characterized in that a front fixing portion and a rear fixing portion are fixed to the beam member.

[0020] According to the above configuration, by being fixed onto the beam member, the strength of the bonnet spacer can be more reliably ensured.

[0021] In a seventh aspect of the present invention, in any one of the fourth to sixth aspects of the present invention, The beam member is characterized in that it is made of a thin plate having a uniform cross-sectional shape in the width direction of the upper rotating body.

[0022] According to the above configuration, the first bonnet and the second bonnet can be easily standardized since the width dimension of the beam member can be changed to suit a variety of specifications of construction machines with different width dimensions of the machine compartment. Effect of the Invention

[0023] As described above, according to the present invention, it is possible to apply the bonnet of an existing construction machine, and to ensure sufficient strength of the bonnet spacer as an additional member that fills the expanded portion of the machine room. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic side view showing an example of a construction machine. [Diagram 2] FIG. 2 is a perspective view showing an upper rotating body of the construction machine according to the embodiment. [Diagram 3] FIG. 3 is an enlarged view of a main part of FIG. 2. [Figure 4] FIG. 2 is a plan view of the first bonnet, the bonnet spacer, and the second bonnet. [Diagram 5] 1 is a perspective view of a machine room frame to which a beam member is fixed. FIG. [Figure 6] FIG. 2 is a perspective view showing a state in which a first bonnet, a bonnet spacer, and a second bonnet are removed. [Figure 7] FIG. 4 is a perspective view of the second bonnet when it is open. [Figure 8] FIG. 2 is a perspective view of a machine room frame to which a bonnet spacer is fixed. [Figure 9] FIG. 2 is a perspective view showing a state in which the second bonnet and the small window are open. [Figure 10] FIG. 2 is a perspective view showing a state in which the second bonnet and the small window are open. [Figure 11] XI-XI line end view of FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] (Embodiment) A construction machine according to an embodiment will be described below with reference to the drawings. Note that in some drawings, the up-down and front-rear and left-right directions are indicated by arrows, and unless otherwise specified, the up-down and other directions will be described according to the directions indicated by these arrows. In the following description, the front-rear direction of the upper rotating body will be simply referred to as the "front-rear direction", the front side of the upper rotating body will be simply referred to as the "front side", and the rear side of the upper rotating body will be simply referred to as the "rear side". Also, the left-right direction of the upper rotating body will be referred to as the "left-right direction" or the "width direction", the left side will be simply referred to as the "left side", and the right side will be simply referred to as the "right side". Note that, in terms of the left-right direction, the left side when viewed from the rear side to the front side will be referred to as the left, and the right side will be referred to as the right.

[0026] Fig. 1 is a side view showing an example of a construction machine according to an embodiment, and Fig. 2 is a perspective view showing an upper rotating body of the construction machine according to an embodiment. Note that the upper rotating body in Fig. 2 is in a state where no attachment is installed.

[0027] 1 and 2, a construction machine 10 according to an embodiment of the present invention is, for example, a hydraulic excavator, and includes a crawler-type lower traveling body 11 and an upper rotating body 12 rotatably mounted on the lower traveling body 11. The upper rotating body 12 is provided with an attachment 13, a cab 14, a machine room 15, a rotating frame 16, etc.

[0028] The rotating frame 16 is a sheet metal structure that is rotatably mounted on the upper part of the lower running body 11, and the attachment 13, cab 14, machine room 15, hydraulic oil tank 17 and fuel tank 18 are mounted on the upper surface of the rotating frame 16.

[0029] The attachment 13 is installed at the front of the upper rotating body 12, and has a boom 13a, an arm 13b, and a bucket 13c. The boom 13a etc. move in conjunction with the extension and contraction of a hydraulic cylinder 13d that is hydraulically controlled, and perform work such as excavation. The boom 13a etc. are operated from a cab 14.

[0030] The cab 14 is, for example, a rectangular box-shaped operator's cab, and is installed at the front of the upper rotating body 12 adjacent to the attachment 13. A fuel tank 18 is disposed behind the cab 14, and an air cleaner 20 for filtering the intake air for the engine is disposed above the fuel tank 18.

[0031] A hydraulic oil tank 17 is disposed to the side of the fuel tank 18 and the air cleaner 20, facing each other across a central scaffold 21. A stepped ascending / descending step 22 is provided in front of the hydraulic oil tank 17 to guide an operator to the central scaffold 21.

[0032] The machinery room 15 is disposed at the rear of the upper rotating body 12 and extends in the width direction of the upper rotating body 12. The machinery room 15 is partitioned by a machinery room frame installed on the upper surface of the revolving frame 16, and accommodates power machinery such as an exhaust gas aftertreatment device, an engine, and a hydraulic pump inside. The machinery room 15 is covered at the front by a hydraulic oil tank 17 and a fuel tank 18, at the left and right sides by side covers 23, and at the rear by a counterweight 19. In addition, as shown in Figs. 3 and 4, the upper surface of the machinery room 15 is covered by a first bonnet 30 and a second bonnet 40 arranged at an interval from each other in the width direction of the upper rotating body 12, and a bonnet spacer 50 arranged in connection with the first bonnet 30 and the second bonnet 40.

[0033] As shown in FIG. 5, the machinery room frame 60 is formed by a plurality of pillar members 61a-e that are spaced apart from one another on the upper surface of the revolving frame 16, and frame members 62a-d that extend in the front-rear and left-right directions, and the frame members 62a-d define the machinery room 15.

[0034] Specifically, the machine room frame 60 has a top plate 63 at the upper ends of pillar members 61a-c standing on the right side. As shown in Fig. 6, an exhaust gas aftertreatment device 80 is installed on the upper surface of the top plate 63. In addition, pillar members 64a-d are erected on the upper surface of the top plate 63. A hydraulic pump (not shown) connected to the right side of the engine 90 is disposed below the top plate 63.

[0035] In the machinery room 15, an engine 90 is disposed horizontally extending in the width direction to the left of the exhaust gas aftertreatment device 80, and a cooling fan 91 and a heat exchanger 92 are disposed further to the left of the engine 90. The machinery room frame 60 has pillar members 61d, 61e standing side by side in the front-rear direction at the left end. The engine 90 has an oil filler port 90a for filling the engine with oil at the upper right end. At least the upper end of the oil filler port 90a of the engine 90 protrudes upward beyond the upper ends of the pillar members 61d, 61e and 64a-d.

[0036] The right frame member 62a extends in the front-rear direction so as to bridge the upper ends of the pillar members 64a, 64b that are arranged side by side in the front-rear direction at the right end of the machine room frame 60. The left frame member 62b extends in the front-rear direction so as to bridge the upper ends of the pillar members 61d, 61e that are arranged side by side in the front-rear direction at the left end of the machine room frame 60. The front frame member 62c extends in the width direction of the upper rotating body 12 so as to bridge the upper ends of the pillar members 64a, 64c, and 61d that are arranged side by side in the left-right direction at the front end of the machine room frame 60. The rear frame member 62d extends in the width direction of the upper rotating body 12 so as to bridge the upper ends of the pillar members 64c, 64d, and 61e that are arranged side by side in the left-right direction at the rear end of the machine room frame 60. The front frame member 62c and the rear frame member 62d may be connected to each other by a plurality of members. Furthermore, the machinery room frame 60 has, above the engine 90, a beam member 70 that connects the front frame member 62c and the rear frame member 62d.

[0037] The first bonnet 30 is located at the upper right part of the machinery compartment 15 and is supported by a right frame member 62a, a front frame member 62c and a rear frame member 62d, and covers the upper part of the exhaust gas aftertreatment device 80.

[0038] The second bonnet 40 is located at the upper left side of the engine compartment 15 and is supported by the left frame member 62b, the front frame member 62c and the rear frame member 62d, and covers the upper parts of the engine 90, the cooling fan 91 and the heat exchanger 92.

[0039] The beam member 70 reduces the torsional displacement of the front frame member 62c and the rear frame member 62d, and ensures the strength of the machine room frame 60 and the bonnet spacer 50. The beam member 70 is located between the first bonnet 30 and the second bonnet 40, and is disposed such that at least a portion of the beam member 70 overlaps with the bonnet spacer 50 in a plan view. In this embodiment, the width dimension of the beam member 70 is formed to be wider than that of the bonnet spacer 50. In a plan view, the right end of the beam member 70 overlaps with the first bonnet 30, and the left end of the beam member 70 overlaps with the second bonnet 40. In addition, the bonnet spacer 50 overlaps with the beam member 70 in a plan view, except for an internal opening 73 described later.

[0040] Specifically, the beam member 70 has a front end portion fixed to the upper part of the front frame member 62c and a rear end portion fixed to the upper part of the rear frame member 62d so as to bridge the front frame member 62c and the rear frame member 62d on the left side of the top plate 63. The beam member 70 is preferably formed from a thin plate having a uniform cross-sectional shape in the width direction of the upper rotating body 12, and by changing the length in the width direction, it is applicable to construction machines of multiple specifications having different width dimensions of the machine room 15.

[0041] The beam member 70 has a horizontal surface 71 extending substantially horizontally in the front-rear direction of the upper rotating body 12, and a vertical surface 72 erected from the horizontal surface 71. In this embodiment, the vertical surface 72 is formed from the left end of the horizontal surface 71 across the front-rear direction, and the cross section of the beam member 70 in the width direction is L-shaped. The cross section of the beam member 70 is not limited to an L-shape, and may be, for example, a T-shape in which the vertical surface 72 erects from approximately the center of the horizontal surface 71 on the left and right.

[0042] At least one of the first bonnet 30 and the second bonnet 40 is configured to be openable and closable, and the vertical surface 72 has a guide rail 72a that guides the opening and closing of at least one of the first bonnet 30 and the second bonnet 40. In this embodiment, as shown in FIG. 7, the second bonnet 40 is configured to be openable and closable by a hinge connected to the rear portion. The vertical surface 72 is formed with a long hole-shaped guide rail 72a extending in the front-rear direction. One end of a stay 41 is connected to the second bonnet 40, and the other end of the stay 41 is connected to the second bonnet 40 so as to be slidable on the guide rail 72a, and the guide rail 72a can guide the opening and closing of the second bonnet 40.

[0043] Since the beam member 70 can secure strength by the vertical surface 72, the internal openings 73, 74 can be provided on the horizontal surface 71 and the vertical surface 72. For example, in this embodiment, as shown in FIG. 6, the engine 90 protrudes into the beam member 70, and at least the fuel filler port 90a protrudes upward from the upper ends of the pillar members 61d, 61e, and 64a-d. Therefore, in order to prevent interference between the beam member 70 and the engine 90, the beam member 70 has an internal opening 73 formed by cutting out a part of the horizontal surface 71 from the left end toward the right side, and an internal opening 74 formed by cutting out a part of the vertical surface 72 from the lower end toward the upper side. The internal opening 73 formed on the horizontal surface 71 is provided at a position opposite to the opening 51 of the bonnet spacer 50 described later, which facilitates access to the lower part of the beam member 70. In addition, a dam 71a is formed on the horizontal surface 71, standing on the periphery of the internal opening 73, to prevent intrusion of rainwater, etc. into the machine room 15.

[0044] The bonnet spacer 50 is an additional component for covering the expanded portion when the existing first bonnet 30 and second bonnet 40 are applied to a new construction machine with an expanded machinery compartment, for example, and covers the upper surface of the machinery compartment 15 between the first bonnet 30 and the second bonnet 40.

[0045] 8, the bonnet spacer 50 is an arch-shaped member composed of a front fixing portion 50a erected on the front side, a rear fixing portion 50b erected on the rear side, and a flat portion 50c extending in the front-rear direction so as to connect the upper ends of the front fixing portion 50a and the rear fixing portion 50b, and the front fixing portion 50a and the rear fixing portion 50b are fixed to the upper surface of a beam member 70. The width dimension of the bonnet spacer 50 is shorter than those of the first bonnet 30 and the second bonnet 40. The bonnet spacer 50 is formed with edge portions 50d that hang down in the front-rear direction from both left and right end portions.

[0046] As shown in FIG. 9, the bonnet spacer 50 has an opening 51 communicating with the inside of the machine room 15 and an openable small window 52 that closes the opening 51. Specifically, the bonnet spacer 50 is cut from the left end to the right end from the upper part of the front fixing part 50a to the approximately center part in the front-rear direction of the flat part 50c, forming the opening 51. The opening 51 is provided at a position facing the internal opening 73 of the beam member 70 and is formed larger than the internal opening 73. A small window 52 that is slightly larger than the opening 51 is attached to the rear end of the opening 51 via a hinge 52a so as to be freely rotatable. The small window 52 is not limited to the above-mentioned form as long as it can open and close the opening 51, and may be, for example, detachable from the opening 51.

[0047] When an operator opens the second bonnet 40 and the small window 52 in the central scaffold 21, the power machinery housed in the machinery room 15 is exposed through the opening 51 and the internal opening 73 as shown in Fig. 10, facilitating maintenance. For example, in this embodiment, the oil supply port 90a located at the bottom of the beam member 70 is accessible through the opening 51 and the internal opening 73, facilitating engine oil supply.

[0048] Next, the arrangement of the first bonnet 30, the second bonnet 40, and the bonnet spacer 50 will be described. At least one of the first bonnet 30 and the second bonnet 40 is arranged to overlap the bonnet spacer 50 and the small window 52 on the upper side in the closed state. In this embodiment, as shown in FIG. 11, the openable second bonnet 40 has a weather strip 42 at its edge to prevent intrusion of rainwater and the like. This weather strip 42 is arranged to overlap the bonnet spacer 50 and the small window 52 on the upper side in the closed state of the second bonnet 40, and maintains the closed state of the small window 52. Note that the edge 31 of the first bonnet 30 overlaps the bonnet spacer 50 on the upper side, but is joined at a position that does not interfere with the small window 52. That is, by opening the second bonnet 40, the small window 52 can be opened and closed freely. With this configuration, it is not necessary to provide a locking mechanism for the small window 52.

[0049] According to the construction machine 10 of this embodiment configured as described above, when the first bonnet 30 and the second bonnet 40 are arranged with a gap between them on the left and right, a space is generated between the first bonnet 30 and the second bonnet 40, but the bonnet spacer 50 is arranged adjacent to the first bonnet 30 and the second bonnet 40 to cover the upper surface of the machine room 15 so that the machine room 15 is not exposed from this space. For example, it is possible to use the first bonnet 30 and the second bonnet 40 as the bonnets of existing construction machines as common parts, and cover the expanded portion of the machine room 15 with the bonnet spacer 50. Furthermore, the bonnet spacer 50 is configured to overlap the beam member 70, thereby ensuring sufficient strength.

[0050] The above-described embodiment is merely illustrative in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Explanation of symbols]

[0051] 10. Construction machinery 11 Undercarriage 12 Upper rotating body 15 Machine room 30 First bonnet 40 Second bonnet 50 Bonnet spacer 51 Aperture 52 Small Window 60 Machine Room Frame 61a~e Column members 62a Right side frame member 62b Left side frame member 62c Front frame member 62d Rear frame member 63 Tabletop 64a~d Column members 70 Beam member 71 Horizontal plane 72 Vertical plane 73,74 Internal opening 80 Exhaust gas aftertreatment device 90 Engine

Claims

1. A front frame member and a rear frame member each defining a machine room for accommodating an engine and extending in a width direction of the upper rotating body; A first bonnet and a second bonnet are arranged at an interval from each other in a width direction of the upper rotating body and cover an upper surface of the machine room; a bonnet spacer disposed adjacent to the first bonnet and the second bonnet and covering an upper surface of the machine chamber between the first bonnet and the second bonnet; a beam member connecting the front frame member and the rear frame member above the engine, A construction machine, characterized in that at least a portion of the beam member is arranged in a position overlapping with the bonnet spacer in a plan view.

2. 2. The construction machine according to claim 1, wherein the bonnet spacer has an opening communicating with the inside of the machine room, and a small window that can be opened and closed to close the opening.

3. 3. The construction machine according to claim 2, wherein at least one of the first bonnet and the second bonnet is configured to be openable and closable, and is positioned above and overlapping the bonnet spacer and the small window when in a closed state.

4. 4. A construction machine according to claim 2 or 3, characterized in that the beam member has a horizontal surface extending in the fore-and-aft direction of the upper rotating body and a vertical surface erected from the horizontal surface, and has an internal opening at a position opposite the opening.

5. 5. The construction machine according to claim 4, wherein the vertical surface has a guide rail for guiding at least one of the first bonnet and the second bonnet.

6. 6. The construction machine according to claim 1, wherein the bonnet spacer has a front fixing portion and a rear fixing portion fixed to the beam member.

7. 7. The construction machine according to claim 4, wherein the beam member is formed of a thin plate having a uniform cross-sectional shape in the width direction of the upper rotating body.

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