Work machine

Abstract

To provide a work machine 1 capable of reducing restriction of arrangement of a device mounted on a machine body 2.SOLUTION: A work machine 1 includes: a travel device 3; a machine body 2 which is turnably mounted on the travel device 3; a device 28 which is mounted on a turning substrate 15 constituting the bottom part of the machine body 2; and a guard member 54 which is arranged on the outer side in a machine body width direction of the device 28, and guards the device 28 from impact from outside.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a working machine.

Background Art

[0002] Conventionally, a working machine disclosed in Patent Document 1 is known.

[0003] The working machine disclosed in Patent Document 1 includes a machine body rotatably supported on a traveling device and a battery (equipment) mounted on the machine body. The battery is attached to a swivel board that constitutes the bottom of the machine body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, for example, if the battery is disposed at a position on the outer side in the machine body width direction of the swivel board, there is a risk that the battery may hit an obstacle such as a wall and be damaged when the machine body rotates. In consideration of this, the battery is arranged so as to avoid an impact from the outside. For this reason, conventionally, there has been a problem that there are large layout restrictions regarding the arrangement of the battery.

[0006] In view of the above problems, an object of the present invention is to provide a working machine capable of reducing restrictions on the arrangement of equipment mounted on the machine body.

Means for Solving the Problems

[0007] The working machine according to one aspect of the present invention includes a traveling device, a machine body rotatably mounted on the traveling device, a device attached to a swivel board constituting the bottom of the machine body, and a guard member disposed on the outer side in the machine body width direction of the device to guard the device from an external impact.

Effect of the Invention

[0008] According to the above working machine, the device can be guarded from an external impact by the guard member disposed on the outer side in the machine body width direction of the device. Thereby, the constraints on the arrangement of the device can be reduced.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Mode for Carrying Out the Invention

[0010] Hereinafter, an embodiment of the present invention will be described with appropriate reference to the drawings.

[0011] FIG. 1 is a schematic side view showing the overall configuration of the working machine 1 according to the present embodiment. FIG. 2 is a schematic plan view of the working machine 1 with the working device 4 omitted. In the present embodiment, an example of the working machine 1 is a backhoe which is a swing working machine.

[0012] As shown in FIGS. 1 and 2, the working machine 1 includes a machine body (swing platform) 2, a traveling device 3, and a working device 4. A cabin 5 is mounted on the machine body 2. Inside the cabin 5, a driver's seat 6 on which an operator sits is provided. The driver's seat 6 is surrounded by the cabin 5.

[0013] In the present embodiment, the direction facing the front side of the operator sitting on the driver's seat 6 of the working machine 1 (the direction of arrow A1 in FIGS. 1 and 2) is referred to as the front (front of the machine body), and the direction facing the rear side of the operator (the direction of arrow A2 in FIGS. 1 and 2) is referred to as the rear (rear of the machine body).

[0014] Also, the direction facing the left side of the operator (the back side in FIG. 1, the direction of arrow B1 in FIG. 2) is referred to as the left side, and the direction facing the right side of the operator (the front side in FIG. 1, the direction of arrow B2 in FIG. 2) is referred to as the right side.

[0015] Also, the horizontal direction, which is orthogonal to the front-rear direction (the front-rear direction of the vehicle body) K1, will be described as the vehicle body width direction (the left-right direction) K2 (see Fig. 2). The direction from the center portion in the width direction of the vehicle body 2 toward the right portion or the left portion will be described as the outer side in the vehicle body width direction. That is, the outer side in the vehicle body width direction is the direction away from the center in the width direction of the vehicle body 2 in the vehicle body width direction K2. The direction opposite to the outer side in the vehicle body width direction will be described as the inner side in the vehicle body width direction. That is, the inner side in the vehicle body width direction is the direction approaching the center in the width direction of the vehicle body 2 in the vehicle body width direction K2.

[0016] As shown in Fig. 1, in this embodiment, the traveling device 3 is a crawler-type traveling device, and includes a traveling frame 8 and traveling mechanisms 9 provided on the left and right of the traveling frame 8. The traveling mechanism 9 is a crawler-type traveling mechanism configured to wind an endless crawler belt 10 around a drive wheel 11, an idler 12, and a plurality of tumbler wheels 13, and circulate the crawler belt 10 by rotationally driving the drive wheel 11 with a traveling motor 14. Note that the traveling device 3 may be a wheel-type traveling device.

[0017] A dozer device 7 is mounted on the front portion of the traveling device 3.

[0018] The vehicle body 2 is mounted on the traveling frame 8 so as to be rotatable left and right. Specifically, as shown in Figs. 1 and 2, the vehicle body 2 has a swivel substrate 15 which is a base plate constituting the bottom of the vehicle body 2. The swivel substrate 15 is formed of a thick plate material and is arranged such that the plate surface faces the vertical direction. The swivel substrate 15 is rotatably supported around an axis (swivel axis X1) extending in the vertical direction via a swivel bearing 16 on the traveling frame 8. Thereby, the vehicle body 2 is rotatably supported by the traveling frame 8.

[0019] As shown in FIG. 2, the pivot axis X1 is located at the front part of the machine body 2 (swivel base plate 15) and substantially at the center in the machine body width direction K2. The machine body 2 has a swivel frame 19 including a swivel base plate 15, a support bracket 17 fixedly provided in a forward projecting shape at the front part of the swivel base plate 15, and a pair of vertical ribs 18 extending rearward from the left and right parts at the rear part of the support bracket 17 and fixed to the swivel base plate 15.

[0020] As shown in FIG. 1, a swing bracket 75 is rotatably supported about an axis extending in the vertical direction on the support bracket 17. A working device 4 is attached to this swing bracket 75.

[0021] As shown in FIG. 1, the working device 4 has a boom 76, a boom cylinder 79, an arm 77, an arm cylinder 80, a working tool (bucket) 78, and a working tool cylinder (bucket cylinder) 81. The base of the boom 76 is rotatably connected to the swing bracket 75 and is swingable in the vertical direction. The boom cylinder 79 swing-drives the boom 76 by performing a telescopic operation. The arm 77 is rotatably connected to the tip of the boom 76 and is swingable in the front-rear direction K1. The arm cylinder 80 swing-drives the arm 77 by performing a telescopic operation. The working tool 78 is rotatably connected to the tip side of the arm 77 and is swingable in the front-rear direction K1. The working tool cylinder 81 swing-drives the working tool 78 by performing a telescopic operation. In the present embodiment, a bucket is exemplified as the working tool 78.

[0022] Further, the machine body 2 has a weight 20 attached to the rear part of the swivel frame 19 (swivel base plate 15), and a swivel cover 21 (see FIG. 2) covering the left side surface and the left front surface of the swivel frame 19 below the cabin 5.

[0023] As shown in FIG. 2, the weight 20 is provided from one side (right side) in the machine body width direction K2 of the slewing base plate 15, through the rear of the slewing base plate 15, to the other side (left side) in the machine body width direction K2 of the slewing base plate 15. The front end of the part (one-side part) 20a on one side of the weight 20 is located behind the front end of the part (the other-side part) 20b on the other side.

[0024] The machine body 2 has a bonnet 22 that covers various devices, various apparatuses, etc. (arranged above the slewing frame 19) mounted on the machine body 2. The bonnet 22 constitutes the right front surface, the right side surface, the upper surface of the right part and the rear part of the machine body, and the rear surface above the weight 20.

[0025] The various devices, various apparatuses, etc. include a prime mover 23 composed of various engines or motors, etc., a pump unit 24 composed of a plurality of pumps that discharge hydraulic oil for operating a hydraulic actuator, pilot operating oil for operating a valve, and operating oil for signals, a cooler unit 27 including coolers such as a radiator 25 and an oil cooler 26, a battery (device) 28 that supplies power to electrical components, etc., a fuel tank that stores fuel for the prime mover 23, a hydraulic oil tank that stores hydraulic oil, etc.

[0026] As shown in FIG. 2, the prime mover 23 is arranged at the middle part in the machine body width direction K2 at the rear part of the slewing base plate 15 and in front of the weight 20. The pump unit 24 is attached to the side part (left part) in the machine body width direction K2 of the prime mover 23. The cooler unit 27 is arranged on the side (right side) in the machine body width direction K2 of the prime mover 23. A cooling fan 29 is attached to the prime mover 23 and is arranged between the prime mover 23 and the cooler unit 27. The cooling fan 29 is driven by the driving force of the prime mover 23. Also, the cooling fan 29 is a suction-type fan, and generates cooling air that sucks air from the right side of the cooler unit 27 and flows it toward the prime mover 23 side. An outside air introduction part 30 (see FIG. 1) for taking outside air into the bonnet 22 is provided at the rear part of the right surface of the bonnet 22.

[0027] As shown in FIG. 2, the battery 28 is disposed at the rear part of the slewing base plate 15 and on one side (right end side) in the machine width direction K2. Also, as shown in FIGS. 2, 7, and 8, the battery 28 is disposed in front of one side portion 20a of the weight 20. Further, as shown in FIGS. 2 and 8, the battery 28 is located inward in the machine width direction from the right end of the right traveling mechanism 9 (crawler belt 10).

[0028] Also, the battery 28 is disposed on the right side (outward in the machine width direction) of the cooler unit 27. By disposing the battery 28 upstream of the cooler unit 27 in terms of the cooling air, the battery 28 can be cooled by the cooling air generated by the cooling fan 29.

[0029] As shown in FIGS. 3 and 4, the battery 28 is attached to the slewing base plate 15. In the present embodiment, the battery 28 is attached to the slewing base plate 15 via the mounting base 31. Specifically, the mounting base 31 is fixed on the slewing base plate 15, and the battery 28 is placed on the mounting base 31 and fixed by the holder 32. Note that the shape and structure of the mounting base 31 are not limited to those of the present embodiment.

[0030] As shown in FIGS. 4, 5, and 9, the mounting base 31 includes a base member 33 and a regulating member 34. The base member 33 is formed of a flat plate material, is disposed with the plate surface facing in the vertical direction, and is fixed to the slewing base plate 15 by bolts 35.

[0031] As shown in FIG. 9, the base member 33 has a mounting portion 36 on which the battery 28 is placed, an extending portion 37 that extends outward (rightward) in the machine width direction from the mounting portion 36, and a bracket mounting portion 38 located behind the mounting portion 36.

[0032] As shown in FIGS. 5 and 9, cushioning materials 39 are attached to the front and rear portions of the mounting portion 36, and the battery 28 is placed on the mounting portion 36 via the cushioning materials 39 (see FIG. 6).

[0033] As shown in FIG. 6, the left part of the mounting portion 36 and the middle part in the machine body width direction K2 are overlapped on the turning substrate 15. The right part of the mounting portion 36 protrudes rightward from the right end of the turning substrate 15 (the end in the direction along the plate surface of the turning substrate 15). Therefore, the right part of the battery 28 also protrudes rightward from the right end of the turning substrate 15. Further, the extending portion 37 is located to the right of the battery 28

[0034] As shown in FIG. 6, the restricting member 34 is disposed to the left of the mounting portion 36 (to the left of the battery 28 mounted on the mounting portion 36) and is fixed to the base member 33 by welding or the like. As shown in FIGS. 4 and 9, the restricting member 34 extends in the front-rear direction K1 and has a main plate portion 40 that restricts the battery 28 from moving leftward, a first side plate portion 41 that extends rightward from the front portion of the main plate portion 40 and restricts the battery 28 from moving forward, and a second side plate portion 42 that extends rightward from the rear portion of the main plate portion 40 and restricts the battery 28 from moving rearward.

[0035] As shown in FIG. 4, the main plate portion 40 has a restricting portion 40a formed by raising the plate material constituting the main plate portion 40. As shown in FIG. 6, the restricting portion 40a engages with a first engaging protrusion 43 formed on the lower portion of the battery 28 to restrict the battery 28 from moving upward.

[0036] As shown in FIGS. 5 and 7, the holder 32 has a pressing member 44 that presses the battery 28, and a pair of front and rear rod members 45 disposed on the front side and the rear side of the battery 28. The pressing member 44 is formed in an angular shape and presses the corner portion between the upper surface and the right surface of the battery 28. The rod member 45 has an upper portion that penetrates the pressing member 44, and a lower portion that penetrates through an insertion hole 46 (see FIG. 9) formed in the base member 33 and engages with the lower surface of the base member 33. Fixing nuts 47 are respectively screwed onto male threads formed on the upper portions of the rod members 45, and by tightening the fixing nuts 47, the battery 28 is pressed against the mounting portion 36 (base member 33) and the regulating member 34 and fixed to the mounting base 31. As shown in FIG. 9, the swivel substrate 15 is formed with a through hole 48 for weight reduction, and an insertion hole 46 is formed at a position corresponding to the through hole 48.

[0037] As shown in FIGS. 3 and 4, above the battery 28, a battery cover (equipment cover) 49 that covers the upper part of the battery 28 is provided. As shown in FIG. 6, the battery cover 49 is attached to the battery 28 by interposing the right part of the battery cover 49 between the battery 28 and the pressing member 44.

[0038] As shown in FIG. 3, a bracket member 52 to which a disconnecter 50 and a fuse box 51 are attached is attached to the bracket attachment portion 38 by a fixture (bolt and nut) 53. The disconnecter 50 is, for example, a battery disconnect switch that shuts off the supply current of the battery 28 in the event of an abnormality, an emergency, maintenance, etc. The fuse box 51 houses, for example, a slow blow fuse that has the property of not breaking with an instantaneous current but breaking when a large continuous current flows.

[0039] Incidentally, when the swivel board 15 rotates counterclockwise in Fig. 2 around the swivel axis X1, the battery 28 also moves around the swivel axis X1 together with the swivel board 15. In such a case, there is a risk that the battery 28 may contact an obstacle such as a wall and an external impact may be applied to the battery 28. Therefore, in the present embodiment, as shown in Fig. 3, a battery guard (guard member) 54 for guarding the battery 28 from such an external impact is provided. By providing the battery guard 54, the battery 28 can be guarded from an external impact, and the restrictions on the arrangement of the battery 28 can be reduced.

[0040] As shown in Figs. 3 and 8, the battery guard 54 is arranged on the outer side (right side) in the machine width direction of the battery 28. As shown in Figs. 6 and 8, this battery guard 54 protrudes from one end (right side) in the machine width direction K2 of the swivel board 15 to the one side. Further, the battery guard 54 is arranged at a position inward of the machine width direction K2 from the one end of the traveling device 3.

[0041] Also, as shown in Figs. 6 and 8, the battery guard 54 has a bottom wall 58 arranged on one side (right side) in the machine width direction K2 of the swivel board 15, and a part of the device 28 is placed on the one side and on the bottom wall 58 from one end in the machine width direction K2 of the swivel board 15.

[0042] Next, the structure of the battery guard 54 will be described in detail.

[0043] As shown in Figs. 10, 11 and 12, the battery guard 54 has a main body part 55, a stay part 56, and an engaging part 57. In the present embodiment, the battery guard 54 is a casting, and the main body part 55, the stay part 56, and the engaging part 57 are integrally formed by casting. Note that the battery guard 54 is not limited to a casting, and may be made of sheet metal, resin, or the like.

[0044] As shown in FIGS. 10, 11, and 12, the main body 55 has a bottom wall 58, a first vertical wall 59, a second vertical wall 60, and a third vertical wall 61.

[0045] As shown in FIG. 13, the bottom wall 58 is disposed to the right of the right end face (referred to as the receiving face 62), which is an end face in the direction along the plate surface of the turning substrate 15 (the end face facing the outside in the machine body width direction K2 of the plate material constituting the turning substrate 15). Further, as shown in FIGS. 6 and 9, the bottom wall 58 is disposed below the right part of the mounting portion 36 and the extending portion 37.

[0046] As shown in FIGS. 13 and 14, the left face of the bottom wall 58 abuts against the receiving face 62. That is, the left face (the face on the inner side in the machine body width direction) of the bottom wall 58 is a contact portion 63 that abuts against the receiving face 62 (the turning substrate 15). This contact portion 63 abuts against the end face (the receiving face 62) facing the outside in the machine body width direction K2 of the plate material constituting the turning substrate 15 substantially perpendicularly from the outside in the machine body width direction K2.

[0047] The external impact applied to the battery guard 54 is transmitted from the contact portion 63 to the receiving face 62 (the turning substrate 15) and is received by the receiving face 62. That is, the battery guard 54 has a contact portion 63 that abuts against the turning substrate 15 so that the turning substrate 15 receives the impact applied to the battery guard 54.

[0048] As shown in FIG. 9, a through hole 64 is formed in the bottom wall 58 to reduce the weight of the battery guard 54.

[0049] As shown in FIG. 13, the first vertical wall 59 extends upward from the end portion (right part) on the outer side in the machine body width direction of the bottom wall 58. As shown in FIG. 6, the first vertical wall 59 is disposed at a distance outward in the machine body width direction below the battery 28. As shown in FIG. 10, the first vertical wall 59 is formed to have a longitudinal width extending from one end side to the other end side in the front-rear direction K1 of the bottom wall 58.

[0050] As shown in FIGS. 3, 9, and 13, the bottom wall 58 has a protruding portion 65 that is a portion on the outer side (right side) in the body width direction of the bottom wall 58 and protrudes outward (rightward) in the body width direction from the first vertical wall 59. As shown in FIG. 3, the protruding portion 65 is formed from one end side to the other end side in the front-rear direction K1 of the bottom wall 58 (first vertical wall 59). The right surface (the surface on the outer side in the body width direction) of the protruding portion 65 is a shock receiving portion 66 for receiving an external shock. As shown in FIG. 7, the shock receiving portion 66 is disposed in front of a portion (one-side portion) 20a on one side of the weight 20. Further, as shown in FIGS. 6 and 7, the shock receiving portion 66 is located below the lower end portion of the rear part of the side surface portion of the bonnet 22 and is exposed from the bonnet 22. A notch 71 is formed at the lower end portion of the rear part of the side surface portion of the bonnet 22.

[0051] As shown in FIG. 13, the shock receiving portion 66 is formed at a position corresponding to the contact portion 63 in the horizontal direction. In other words, the vertical direction (up-down direction) positions of the shock receiving portion 66, which is the surface where an external shock is applied, and the receiving surface 62 of the swivel substrate 15, which is the surface receiving the shock, are made to coincide.

[0052] As shown in FIGS. 10 and 12, the second vertical wall 60 extends upward from the front portion of the bottom wall 58 and is connected to the first vertical wall 59. The second vertical wall 60 has an extended portion 60a that extends so as to protrude leftward (inward in the body width direction) from the bottom wall 58. The third vertical wall 61 extends upward from the rear portion of the bottom wall 58 and is connected to the first vertical wall 59. The third vertical wall 61 has an extended portion 61a that extends so as to protrude leftward (inward in the body width direction) from the bottom wall 58.

[0053] As shown in FIG. 9, the right portion of the placement portion 36 and the extended portion 37 are located between the second vertical wall 60 and the third vertical wall 61 when viewed from above.

[0054] As shown in FIGS. 10 and 12, a plurality of stay portions 56 are provided. Specifically, the stay portions 56 are provided on the front side and the rear side of the main body portion 55. Note that the stay portion 56 may be configured as a single unit. The stay portion 56 provided on the front side of the main body portion 55 is referred to as a first stay portion 56F, and the stay portion 56 provided on the rear side of the main body portion 55 is referred to as a second stay portion 56R.

[0055] The first stay portion 56F extends from the front surface of the second vertical wall 60. Specifically, the first stay portion 56F extends forward from the extended portion 60a of the second vertical wall 60 such that the wall surface faces the vertical direction. The second stay portion 56R extends from the rear surface of the third vertical wall 61. Specifically, the second stay portion 56R extends rearward from the extended portion 61a of the third vertical wall 61 such that the wall surface faces the vertical direction. Bolt insertion holes 67 penetrating in the vertical direction are formed in the first stay portion 56F and the second stay portion 56R.

[0056] As shown in FIGS. 3 and 4, when the stay portions 56 (the first stay portion 56F and the second stay portion 56R) are overlapped on the swivel substrate 15 and the bolt 68 is inserted through the bolt insertion hole 67 (see FIG. 10) and screwed into the screw hole 69 (see FIG. 5) formed in the swivel substrate 15, the battery guard 54 is attached to the swivel substrate 15 in a cantilever manner. Note that the screw hole is a hole having a male thread cut on the inner peripheral surface.

[0057] As shown in FIGS. 3, 9, and 10, rib walls 70 are provided on the outer sides (right sides) in the machine width direction of the first stay portion 56F and the second stay portion 56R in the battery guard 54, respectively. The front rib wall 70F provided on the right side of the first stay portion 56F extends forward from the front surface of the second vertical wall 60 such that the wall surface faces the machine width direction K2. The first stay portion 56F is connected to the middle portion in the vertical direction of the rib wall 70F. The rear rib wall 70R provided on the right side of the second stay portion 56R extends rearward from the rear surface of the third vertical wall 61 such that the wall surface faces the machine width direction K2. The second stay portion 56R is connected to the middle portion in the vertical direction of the rib wall 70R.

[0058] As shown in FIG. 11, the upper portion 70a of the rib wall 70 protrudes above the stay portion 56, and the lower portion 70b of the rib wall 70 protrudes below the stay portion 56. The left surface of the lower portion 70b of the rib wall 70 is flush with the contact portion 63. Therefore, the left surface of the lower portion 70b of the rib wall 70 abuts against the right end surface of the swivel substrate 15. Thereby, an external impact applied to the battery guard 54 (impact receiving portion 66) is transmitted to the swivel substrate 15 via the rib wall 70, and the swivel substrate 15 receives it.

[0059] As shown in FIGS. 10, 11, and 12, a plurality of engaging portions 57 are provided. Specifically, a pair of front and rear engaging portions 57 are provided. This pair of engaging portions 57 are formed on the inner side surface (left surface) in the machine width direction of the first vertical wall 59. The pair of engaging portions 57 protrude inward (leftward) in the machine width direction from the lower portion of the inner side surface in the machine width direction of the first vertical wall 59.

[0060] As shown in FIGS. 6 and 14, the engaging portion 57 is located above the outer side portion (right portion) in the machine width direction of the extending portion 37 of the base member 33. The engaging portion 57 can be engaged (placed) on the mounting base 31 (extending portion 37) in a state where the stay portion 56 is overlapped on the swivel substrate 15. By placing the engaging portion 57 on the extending portion 37, the load of the battery guard 54 can be deposited on the mounting base 31.

[0061] As shown in FIG. 13, the battery guard 54 is attached in a cantilevered manner by attaching the stay portion 56 provided on the left portion of the main body portion 55 to the swivel substrate 15. Therefore, when attaching the battery guard 54, for example, a great deal of labor is required for an operator to perform an operation of attaching the stay portion 56 to the swivel substrate 15 while holding the right portion of the battery guard 54.

[0062] Therefore, in the battery guard 54 of the present embodiment, with the stay portions 56 (the first stay portion 56F and the second stay portion 56R) being overlapped on the swivel substrate 15, the engaging portion 57 is engaged (placed) on the mounting base 31 (the extending portion 37), and by entrusting the load of the battery guard 54 to the mounting base 31, the attachment of the stay portion 56 (the attachment of the battery guard 54) can be easily performed. That is, when attaching the battery guard 54 to the swivel substrate 15, by placing the engaging portion 57 on the extending portion 37, it is not necessary for the operator to support the battery guard 54 during the attachment work, and the labor of the attachment work of the battery guard 54 can be reduced.

[0063] Incidentally, the external impact applied to the battery guard 54 (the impact receiving portion 66) is likely to be applied in the horizontal direction. In the present embodiment, by forming the impact receiving portion 66 and the contact portion 63 at corresponding positions in the horizontal direction, the impact applied to the impact receiving portion 66 is transmitted horizontally from the impact receiving portion 66 to the contact portion 63, and the receiving surface 62 of the swivel substrate 15 receives the impact. Thereby, the moment acting on the battery guard 54 due to an external impact can be suppressed. Specifically, for example, when an external impact is applied to the first vertical wall 59 (above the impact receiving portion 66), a moment in the direction of pushing down the battery guard 54 acts on the battery guard 54, but by making the external impact be applied to the impact receiving portion 66, such a moment can be suppressed. When the external impact is applied to a position above the first vertical wall 59 (also above the impact receiving portion 66), a moment in the direction of pushing down the battery guard 54 acts on the battery guard 54. However, by making the external impact be applied to the impact receiving portion 66, such a moment can be suppressed.

[0064] That is, a part that protrudes outward in the machine width direction of the battery guard 54 is formed, that is, a protruding portion 65 is formed, and the surface on the outer side in the machine width direction of the protruding portion 65 is used as the impact receiving portion 66, so that the impact applied to the battery guard 54 is preferentially applied to the impact receiving portion 66 (the obstacle such as a wall hits preferentially). In other words, when an impact is applied to the battery guard 54, the battery guard 54 is formed in a shape in which a part protrudes so that the surface to which the impact is applied (the surface where the obstacle hits) is determined. Further, the vertical positions of the portion where the impact is applied (impact receiving portion 66) in the battery guard 54 and the portion that receives the impact (receiving surface 62) in the turning substrate 15 are made to coincide so that the moment due to the impact applied to the battery guard 54 is reduced.

[0065] Further, in the battery guard 54 of the present embodiment, the first vertical wall 59, the second vertical wall 60, and the third vertical wall 61 are used to improve the rigidity of the battery guard 54 itself. Further, the battery guard 54 is formed to a height that guards the lower part of the battery 28 (below the central part of the battery 28 in the vertical direction). By reducing the height of the battery guard 54, the weight of the battery guard 54 is reduced.

[0066] Figures 15 and 16 show other mounting methods of the battery 28.

[0067] As shown in FIGS. 15 and 16, for the battery 28, the left part is restricted from moving leftward, in the front-rear direction K1, and upward by the restricting member 34. The right part of the battery 28 is restricted from moving upward by the pressing member 73. The pressing member 73 is disposed between the first vertical wall 59 and the battery 28 and between the second vertical wall 60 and the third vertical wall 61, and is fixed to the extending portion 37 by bolts or the like. A second engaging protrusion 72 is formed at the lower part of the right part of the battery 28, and by pressing the second engaging protrusion 72 with the pressing member 73, the upward movement of the right part of the battery 28 is restricted. The pressing member 73 is guarded by the first vertical wall 59, the second vertical wall 60, the third vertical wall 61, etc. of the battery guard 54.

[0068] A preferred embodiment of the present invention provides a working machine 1 described in the following items. (Item 1) A working machine 1 including a traveling device 3, a machine body 2 rotatably supported on the traveling device 3, a device (battery 28) attached on a swivel substrate 15 constituting the bottom of the machine body 2, and a guard member (battery guard 54) disposed on the outer side in the machine body width direction of the device 28 to guard the device 28 from an external impact.

[0069] According to the working machine 1 according to this Item 1, since the guard member 54 disposed on the outer side in the machine body width direction of the device 28 can guard the device 28 from an external impact, the constraints on the arrangement of the device 28 can be reduced. (Item 2) The working machine 1 according to Item 1, wherein the guard member 54 has a contact portion 63 that contacts the swivel substrate 15 so that the swivel substrate 15 receives the impact applied to the guard member 54.

[0070] According to the working machine 1 according to this Item 2, the external impact applied to the device 28 can be received by the swivel substrate 15. (Item 3) The working machine 1 according to Item 2, wherein the guard member 54 has an impact receiving portion 66 for receiving the impact, and the impact receiving portion 66 is formed at a position corresponding to the contact portion 63 in the horizontal direction.

[0071] According to the working machine 1 according to this Item 3, the impact applied to the impact receiving portion 66 can be efficiently transmitted to the swivel substrate 15. (Item 4) The swivel substrate 15 is formed of a plate material and is arranged such that the plate surface faces the vertical direction, and the contact portion 63 is formed on an end surface (receiving surface 62) facing the outside in the machine body width direction K2 of the plate material and contacts substantially vertically from the outside in the machine body width direction K2. The working machine 1 according to Item 2 or 3.

[0072] ​According to the working machine 1 related to this item 4, the external impact applied to the guard member 54 can be suitably received by the slewing base plate 15. (Item 5) The guard member 54 protrudes from one end of the slewing base plate 15 on one side in the machine body width direction K2 to the one side, and is disposed at a position inward of the machine body width direction K2 from the one end of the traveling device 3 on the one side. The working machine according to any one of Items 1 to 4.

[0073] According to the working machine 1 related to this item 5, even if the guard member 54 protrudes from one end of the slewing base plate 15 on one side in the machine body width direction K2 to the one side, for example, when the machine body 2 is not slewed, it is possible to suppress the guard member 54 from hitting an obstacle. (Item 6) The guard member 54 has a bottom wall 58 disposed on one side of one end of the slewing base plate 15 in the machine body width direction K2, and a part of the device 28 is placed on the one side of one end of the slewing base plate 15 in the machine body width direction K2 and on the bottom wall 58. The working machine according to any one of Items 1 to 5.

[0074] According to the working machine 1 related to this item 6, in a case where a part of the device 28 is located on one side of one end of the slewing base plate 15 in the machine body width direction K2, the device 28 can be guarded. (Item 7) The device 28 is disposed at a position on the outer side in the machine body width direction of the slewing base plate 15. The guard member 54 has a bottom wall 58 and a first vertical wall 59 extending upward from an end on the outer side in the machine body width direction of the bottom wall 58. The bottom wall 58 has a protruding portion 65 that is a portion on the outer side in the machine body width direction of the bottom wall 58 and protrudes outward in the machine body width direction from the first vertical wall 59. The impact receiving portion 66 is constituted by a surface on the outer side in the machine body width direction of the protruding portion 65, and the contact portion 63 is constituted by a surface on the inner side in the machine body width direction of the bottom wall 58. The working machine 1 according to Item 3 or Item 4, 5 or 6 that cites Item 3.

[0075] According to the working machine 1 related to this item 7, an external impact applied to the guard member 54 can be preferentially applied to the impact receiving portion 66, and the external impact can be suitably applied to the slewing base plate 15. (Item 8) The working machine 1 according to item 7, wherein the guard member 54 includes a second vertical wall 60 extending upward from the front portion of the bottom wall 58 and connected to the first vertical wall 59, and a third vertical wall 61 extending upward from the rear portion of the bottom wall 58 and connected to the first vertical wall 59.

[0076] According to the working machine 1 related to this item 8, the rigidity of the guard member 54 itself can be improved. (Item 9) The working machine 1 according to any one of items 1 to 8, further comprising a mounting base 31 mounted on the slewing base plate 15 and on which the device 28 is mounted and attached, wherein the guard member 54 includes at least one stay portion 56 overlapped on the slewing base plate 15 and attached thereto, and an engaging portion 57 engaged with the mounting base 31 to support the load of the guard member 54 in a state where the stay portion 56 is overlapped on the slewing base plate 15.

[0077] According to the working machine 1 related to this item 9, when the guard member 54 is attached to the slewing base plate 15, it is not necessary for an operator to support the guard member 54 during the attachment work, and the labor for attaching the guard member 54 can be reduced. (Item 10) The working machine 1 according to item 9, which cites item 8, wherein a plurality of the stay portions 56 are provided, and the plurality of stay portions 56 include a first stay portion 56F extending from the front surface of the second vertical wall 60 and overlapped and attached on the slewing base plate 15, and a second stay portion 56R extending from the rear surface of the third vertical wall 61 and overlapped and attached on the slewing base plate 15, and the engaging portion 57 is formed on the inner surface of the first vertical wall 59 in the machine body width direction.

[0078] According to the working machine 1 related to this item 10, the support of the guard member 54 when attaching the stay portion 56 to the swivel substrate 15 can be performed well. (Item 11) The working machine 1 according to any one of Items 1 to 10, comprising a weight 20 provided at the rear of the swivel substrate 15, wherein the device 28 is disposed in front of a portion (one-side portion 20a) on one side in the machine width direction K2 of the weight 20 at the rear of the swivel substrate 15 in the machine width direction K2.

[0079] According to the working machine 1 related to this item 11, even if the device 28 is disposed in front of a portion on one side in the machine width direction K2 of the weight 20, the device 28 can be guarded by the guard member 54, so that the device 28 can be disposed in front of a portion on one side in the machine width direction K2 of the weight 20. (Item 12) The working machine 1 according to any one of Items 1 to 11, wherein the device 28 is a battery.

[0080] According to the working machine 1 related to this item 12, the restrictions on the arrangement of the battery 28 can be reduced.

[0081] As described above, although one embodiment of the present invention has been described, it should be considered that the disclosed embodiment is illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Description of Reference Numerals

[0082] 2 Machine body 3 Traveling device 15 Swivel substrate 20 Weight 20a Portion (one-side portion) 28 Device (battery) 31 Mounting base 54 Guard member (battery guard) 56 Stay portion 56F First stay portion 56R Second Stage Part 57 Engagement Part 58 Bottom Wall 59 First Longitudinal Wall 60 Second Longitudinal Wall 61 Third Longitudinal Wall 62 End Face (Receiving Face) 63 Contacting Part 65 Protrusion 66 Impact-Receiving Part K2 Machine Body Width Direction

Claims

1. A traveling device, a machine body rotatably supported on the traveling device, equipment mounted on a swivel board constituting the bottom of the machine body, a guard member disposed on the outer side in the machine body width direction of the equipment to guard the equipment from external impacts, and a working machine comprising the same.

2. The working machine according to claim 1, wherein the guard member has a contact portion that contacts the swivel board so that the swivel board receives the impact applied to the guard member.

3. The guard member has an impact receiving portion for receiving the impact, and the working machine according to claim 2, wherein the impact receiving portion is formed at a position corresponding to the contact portion in the horizontal direction.

4. The swivel board is formed of a plate material and is arranged such that the plate surface faces the vertical direction, and the working machine according to claim 2 or 3, wherein the contact portion contacts the end surface facing the outer side in the machine body width direction of the plate material substantially perpendicularly from the outer side in the machine body width direction.

5. The working machine according to any one of claims 1 to 3, wherein the guard member protrudes from one end in the machine body width direction of the swivel board to the one side and is disposed at a position inward in the machine body width direction than the one end of the traveling device in the machine body width direction.

6. The guard member has a bottom wall disposed on one side in the machine body width direction of the swivel board, and a part of the equipment is placed on the one side in the machine body width direction of the swivel board and on the bottom wall, and the working machine according to any one of claims 1 to 3.

7. The equipment is disposed at a portion on the outer side in the machine body width direction of the swivel board, the guard member has a bottom wall and a first vertical wall extending upward from an end on the outer side in the machine body width direction of the bottom wall, the bottom wall has a protruding portion that is a portion on the outer side in the machine body width direction of the bottom wall and protrudes outward in the machine body width direction than the first vertical wall, the impact receiving portion is constituted by a surface on the outer side in the machine body width direction of the protruding portion, and the working machine according to claim 3, wherein the contact portion is constituted by a surface on the inner side in the machine body width direction of the bottom wall.

8. The working machine according to claim 7, wherein the guard member has a second vertical wall extending upward from the front portion of the bottom wall and connected to the first vertical wall, and a third vertical wall extending upward from the rear portion of the bottom wall and connected to the first vertical wall.

9. It includes a mounting base mounted on the swivel board and on which the equipment is placed and mounted. The guard member is, at least one stay portion that is stacked on the swivel substrate and attached to the swivel substrate; an engaging portion that engages with the mounting base so as to receive the load of the guard member in a state where the stay portion is stacked on the swivel substrate. The working machine according to claim 1, 2, 3, 7 or 8.

10. a plurality of the stay portions are provided, the plurality of stay portions are, a first stay portion that extends from the front surface of the second vertical wall and is stacked and attached on the swivel substrate; a second stay portion that extends from the rear surface of the third vertical wall and is stacked and attached on the swivel substrate, and the engaging portion is formed on the surface on the inner side in the machine width direction of the first vertical wall. The working machine according to claim 9, which cites claim 8.

11. comprising a weight provided at the rear of the swivel substrate, the device is disposed in the rear portion of the swivel substrate and on one side in the machine width direction, in front of the portion on the one side in the machine width direction of the weight. The working machine according to claim 1.

12. the device is a battery. The working machine according to claim 1.

Images