Electric work machine

Abstract

To reduce processing cost and surely support a battery unit.SOLUTION: An electric work machine includes a body, a support provided on the body, a battery unit placed on the support, and an electric motor driven by electric power output from the battery unit. The support has a plurality of elongated plate members on which an outer periphery of the bottom of the battery unit is placed. A mounting surface of the plate member on which the battery unit is mounted is machined to be smooth.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to an electric working machine such as a backhoe. [Background technology]

[0002] The work vehicle disclosed in Patent Document 1 comprises a swivel frame, hydraulic equipment mounted on the swivel frame, a battery mounted on the swivel frame, an electric motor disposed on the swivel frame and rotating an output shaft using the power output by the battery, and a hydraulic pump disposed on the swivel frame and discharging hydraulic oil to operate the hydraulic equipment, the battery consisting of a main secondary battery and an auxiliary secondary battery, the hydraulic pump, electric motor and main secondary battery being disposed at the rear on the swivel frame, and the auxiliary secondary battery being disposed on the side of the swivel frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-89369 Summary of the Invention [Problem to be solved by the invention]

[0004] In the work vehicle of Patent Document 1, the auxiliary secondary battery is configured to be detachable from the swivel frame. Here, since the battery needs to be stably supported, the mounting surface on which the battery is mounted may be machined (cut) to make it smooth. However, when the battery has multiple rectangular parallelepiped battery packs and is placed over a relatively large area on the swivel frame, as in the work vehicle of Patent Document 1, the area that needs to be machined is also large, which requires a long machining time and increases the machining costs for the area where the battery is placed.

[0005] The present invention has been made to solve the problems of the prior art, and has an object to provide an electric working machine that can reduce processing costs and can reliably support a battery unit. [Means for solving the problem]

[0006] electric The electric work machine includes a machine body, a support body provided on the machine body, a battery unit mounted on the support body, and an electric motor driven by the power output from the battery unit, and the support body has a plurality of long plate members on which the outer periphery of the bottom of the battery unit is placed. and a frame member that connects the plurality of plate members, the frame member being fixed to the lower surface and / or the side surface of the plate members by welding; The mounting surface of the plate member on which the battery unit is mounted is machined to be smooth, The plate member is machined while being fixed to the frame member by welding. . [Effects of the Invention]

[0007] According to the electric working machine, the processing cost can be reduced and the battery unit can be reliably supported. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a schematic side view showing the swing work machine. [Figure 2] FIG. 2 is a schematic plan view showing the swing work machine. [Figure 3] FIG. 2 is a schematic rear view showing the swing work machine. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 2 is a plan view showing a lower running body, a swivel base, and various devices arranged on the swivel base. [Figure 7] FIG. 2 is a right front perspective view showing a swivel base plate, a battery unit, an electric motor, a hydraulic pump, and electrical equipment. [Figure 8] FIG. [Figure 9] FIG. [Figure 10]FIG. [Figure 11] FIG. 10 is a diagram illustrating the movement of the fixing tool. [Figure 12] FIG. 2 is a left rear perspective view showing the support body, the first standing portion, the second standing portion, etc. [Figure 13] FIG. 2 is an exploded perspective view of the connecting stay and the electrical equipment as viewed from the left front. [Figure 14] FIG. 2 is a plan view showing the electric motor, the support portion, and the hydraulic pump. [Figure 15] FIG. 2 is an exploded perspective view of the electric motor, the connector, and the first bracket as viewed from the front left. [Figure 16] FIG. 4 is an exploded perspective view of the hydraulic pump and the second bracket as viewed from the right rear. [Figure 17] FIG. [Figure 18] FIG. 10 is an exploded perspective view showing attachment of a first bracket and the like to a support portion. [Figure 19] FIG. 10 is an exploded perspective view showing attachment of a second bracket and the like to a support portion. [Figure 20] FIG. 10 is a rear view of the support part showing the position of the first knock pin. [Figure 21] FIG. 10 is a front view of the support portion showing the position of the second knock pin. [Figure 22] FIG. 10 is a right rear perspective view showing the installation of the third assembly. [Figure 23] FIG. 10 is an exploded perspective view of an electric motor, a connector, and a first bracket in a modified example, as viewed from the front left. [Figure 24] FIG. 10 is an exploded perspective view of a hydraulic pump and a second bracket in a modified example, as viewed from the right rear. [Figure 25] FIG. 10 is a right rear perspective view showing attachment of the first assembly and the second assembly to the support portion in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a schematic side view of a swivel work machine 1. Fig. 2 is a schematic plan view of the swivel work machine 1. Fig. 3 is a schematic rear view of the swivel work machine 1. First, the overall configuration of the swivel work machine 1 will be described. As shown in Fig. 1, the swivel work machine 1 is, for example, a backhoe or the like that includes a swivel base (machine body) 2, a lower traveling body 10, and a working device 20. The swivel work machine 1 is also an electrically driven work machine. A driver's seat 8 where a driver sits is provided on the swivel base 2, and the periphery of the driver's seat 8 is covered by a protection mechanism 85.

[0010] In this embodiment, the direction toward which the driver seated in the driver's seat 8 of the swivel work machine 1 faces (the direction of arrow A1 in Figures 1, 2, etc.) is referred to as the forward direction, and the opposite direction (the direction of arrow A2 in Figures 1, 2, etc.) is referred to as the rearward direction. The left side of the driver (the near side in Figure 1, the direction of arrow B1 in Figures 2 and 3, etc.) is referred to as the left side, and the right side of the driver (the far side in Figure 1, the direction of arrow B2 in Figures 2 and 3, etc.) is referred to as the right side. The horizontal direction that is perpendicular to the front-to-rear direction is referred to as the width direction (see Figures 2 and 3), and the direction from the center of the swivel base 2 in the width direction toward the right or left side is referred to as the outward width direction.

[0011] As shown in FIGS. 1 and 3, the swivel base 2 is rotatable about a rotation axis (vertical axis) X extending in the vertical direction. Specifically, the swivel base 2 is supported on the undercarriage 10 via a rotation bearing 3 so as to be rotatable about the rotation axis X (rotatable to the left and right). The center of the rotation bearing 3 is the rotation axis X (rotation center), and a rotation motor (not shown) is attached to the swivel base 2. This rotation motor is a hydraulic device M driven by hydraulic oil discharged from a hydraulic pump 92, and is a motor that rotates the swivel base 2 about the rotation axis X. The swivel base 2 is provided with an exterior cover (cover) 80, brackets, stays, etc. The exterior cover 80 forms a space (rear room) R at the rear of the swivel base 2 in which equipment, tanks, other parts, etc. are arranged. The brackets, stays, etc. are members for attaching the above-mentioned parts, etc.

[0012] 1 and 3, the lower traveling body 10 has a traveling frame 11 and a traveling mechanism 12. The traveling frame (track frame) 11 is a structure to which the traveling mechanism 12 is attached and which supports the swivel base 2 on its upper portion. The traveling mechanism 12 is, for example, a crawler type. The traveling mechanism 12 has an idler 13, drive wheels 14, a plurality of rollers 15, an endless crawler belt 16, and hydraulic equipment M (travel motors ML, MR) of the traveling system that is driven by hydraulic oil discharged from a hydraulic pump 92. The traveling motors ML, MR are composed of hydraulic motors, and drive the drive wheels 14 to cause the crawler belt 16 to circulate in the circumferential direction. As shown in FIG. 3, a dozer device 18 is attached to the front of the lower traveling body 10 and is driven up and down by the extension and contraction of a dozer cylinder C5 (M), which is a hydraulic cylinder (hydraulic actuator).

[0013] As shown in FIGS. 1 and 2 , the work device 20 is provided on the front side of the swivel base 2. The work device 20 has a boom 21, an arm 22, and a bucket (work implement) 23. The base end of the boom 21 is pivotally attached to a swing bracket 24 so as to be rotatable around a horizontal axis (an axis extending in the width direction), allowing the boom 21 to swing up and down (vertically). The arm 22 is pivotally attached to the tip of the boom 21 so as to be rotatable around the horizontal axis, allowing the arm 22 to swing back and forth or up and down. The bucket 23 is attached to the tip of the arm 22 so as to be capable of scooping and dumping. The swivel work machine 1 can be equipped with another work implement (hydraulic attachment) that can be driven by hydraulic oil, instead of or in addition to the bucket 23. Examples of such other work implements include a hydraulic breaker, hydraulic crusher, angle broom, earth auger, pallet fork, sweeper, mower, and snow blower.

[0014] As shown in FIG. 1, the swivel work machine 1 is equipped with working hydraulic equipment M that operates using hydraulic oil discharged from a hydraulic pump 92, and the work mechanism 20 is driven by the operation of the working hydraulic equipment M. In this embodiment, the hydraulic equipment M includes a swing cylinder C1, a boom cylinder C2, an arm cylinder C3, and a bucket cylinder C4. The swing cylinder C1, the boom cylinder C2, the arm cylinder C3, and the bucket cylinder C4 are configured as hydraulic cylinders (hydraulic actuators). As shown in FIG. 1, the swing bracket 24 is capable of swinging by extension and retraction of the swing cylinder C1 provided on the right side of the swivel base 2. The boom 21 is capable of swinging by extension and retraction of the boom cylinder C2. The arm 22 is capable of swinging by extension and retraction of the arm cylinder C3. The bucket 23 is capable of scooping and dumping by extension and retraction of the bucket cylinder C4.

[0015] Therefore, the hydraulic equipment M provided in the swing work machine 1 is the swing motor, travel motors ML and MR, swing cylinder C1, boom cylinder C2, arm cylinder C3, bucket cylinder C4, and dozer cylinder C5. The swivel base 2 will now be described. Fig. 4 is a left-front perspective view of the swivel base 2. Fig. 5 is a right-rear perspective view of the swivel base 2. As shown in Figs. 4 and 5, the swivel base 2 has a swivel base plate (base plate) 30, multiple vertical ribs 31 (first vertical rib 31a, second vertical rib 31b, third vertical rib 31c), support brackets 32, partition plates 33, horizontal ribs 34, and a support frame 35. The swivel base plate 30 is formed from a thick steel plate or the like, and is arranged so that the plate surface faces up and down. The swivel base plate 30 is supported on the lower running body 10 via a swivel bearing 3 so as to be rotatable about the swivel axis X.

[0016] The first vertical rib 31a, the second vertical rib 31b, and the third vertical rib 31c are members that reinforce the swivel base 30 and are provided extending in the front-to-rear direction of the swivel base 30. The first vertical rib 31a and the second vertical rib 31b are erected on the swivel base 30 and are arranged side by side and spaced apart in the width direction. The first vertical rib 31a is arranged on the left side of the swivel base 30, and the second vertical rib 31b is arranged on the right side of the swivel base 30. The third vertical rib 31c is arranged between the first vertical rib 31a and the second vertical rib 31b, and is provided extending from the rear of the swivel base 30 to the partition plate 33.

[0017] The support bracket 32 ​​is provided in front of the first vertical rib 31a and the second vertical rib 31b. As shown in Fig. 4, the support bracket 32 ​​and the front portions of the first vertical rib 31a and the second vertical rib 31b are provided in a position offset to the right from the center in the width direction of the swivel base plate 30. As shown in Fig. 1, the swing bracket 24 is attached to the support bracket 32 ​​so as to be swingable around a vertical axis (an axis extending in the up-down direction).

[0018] 4 and 5, the partition plate 33 is a member that separates the lower front portion of the rear room R. The partition plate 33 has a plate surface facing the front-rear direction and is disposed in the center of the swivel base plate 30 from one side (left side) to the other side (right side) in the width direction. The horizontal ribs 34 are members that reinforce the swivel base plate 30, and are arranged from one side (left side) to the other side (right side) in the width direction at the rear end of the swivel base plate 30. The horizontal ribs 34 are erected on the swivel base plate 30, and are connected to the rear ends of the first vertical ribs 31a, the second vertical ribs 31b, and the third vertical ribs 31c.

[0019] The support frame 35 is provided at the rear of the swivel base 30, standing rearward of the partition plate 33. The rear of the support frame 35 is located rearward of the rear of the lower running body 10. Specifically, the support frame 35 is disposed in the rear room R, and supports the exterior cover 80 and peripheral components disposed inside the exterior cover 80. The support frame 35 has a plurality of leg members (first leg 35a, second leg 35b, third leg 35c, fourth leg 35d, fifth leg 35e) standing on the swivel base 30, a first rod member 35h, and a second rod member 35i.

[0020] The first leg 35a is erected on the front left side of the rear room R. The first leg 35a is erected in front of a first base 40a that is provided on the rear left side of the first vertical rib 31a. The first base 40a extends from the partition plate 33 to the horizontal rib 34. The lower end of the first leg 35a extends upward from the first base 40a, extends rearward and upward at a midpoint, and bends at the upper end to extend rearward.

[0021] The second leg 35b is erected on the front right side of the rear room R. The second leg 35b is erected on a second base 40b attached to the rear right side of the partition plate 33. In other words, the lower end of the second leg 35b is located further forward than the lower end of the first leg 35a. The lower end of the second leg 35b extends upward from the second base 40b, extends rearward and upward at a midpoint, and bends at the upper end to extend rearward.

[0022] The third leg 35c is erected on the rear left side of the rear room R. The third leg 35c is erected in the center of the first base 40a. The lower end of the third leg 35c extends upward from the first base 40a and reaches the upper end of the first leg 35a. The fourth leg 35d is erected at the rear of the rear room R. The fourth leg 35d is disposed toward the left of the rear of the rear room R, and is disposed widthwise inward (to the right) of the third leg 35c. The fourth leg 35d is erected at a third base 40c provided at the left part of the horizontal rib 34. The fourth leg 35d has a lower end that extends upward from the third base 40c, a middle portion that extends forward and upward, and an upper end that bends and extends forward.

[0023] The fifth leg 35e is erected at the rear of the rear room R. The fifth leg 35e is located towards the right of the rear of the rear room R. The fifth leg 35e is erected at the fourth base 40d provided on the right part of the horizontal rib 34. The fifth leg 35e has a lower end that extends upward from the fourth base 40d, a middle portion that extends forward and upward, and an upper end that bends and extends forward. 4 and 5, the upper end of the fourth leg 35d and the upper end of the fifth leg 35e are connected by a connecting plate 35f arranged to extend in the width direction. Furthermore, a pair of support pillars 35g are provided on the connecting plate 35f, extending forward from the front end of the connecting plate 35f. The pair of support pillars 35g are spaced apart in the width direction and are arranged corresponding to the upper ends of the fourth leg 35d and the fifth leg 35e, respectively. The rear ends of the fourth leg 35d and the fifth leg 35e are located rearward of the rear of the lower running body 10.

[0024] The first rod member 35h and the second rod member 35i are arranged with their plate surfaces facing up and down and extending in the width direction. The first rod member 35h is arranged forward of the second rod member 35i. The first rod member 35h and the second rod member 35i are placed on and fixed to the upper ends of the first leg 35a, the second leg 35b, the left support pillar 35g, and the right support pillar 35g. The first rod member 35h supports the rear of the protection mechanism 85. The second rod member 35i supports the exterior cover 80.

[0025] The following describes the equipment mounted in the rear room R of the swivel base 2. FIG. 6 is a plan view showing the undercarriage 10, the swivel base 30, and various equipment and the like arranged on the swivel base 30. FIG. 7 is a right-front perspective view showing the swivel base 30, the battery unit 90, the electric motor 91, the hydraulic pump 92, and the electrical equipment 93. As shown in FIGS. 6 and 7, the swivel work machine 1 includes the battery unit 90, the electric motor 91, the hydraulic pump 92, and the electrical equipment 93, and the battery unit 90, the electric motor 91, the hydraulic pump 92, and the electrical equipment 93 are provided on the swivel base 2. The battery unit 90 is a structure that can store electricity and outputs the stored electricity. In this embodiment, the battery unit 90 includes multiple batteries 90a. The multiple batteries 90a are connected in parallel to each other. The multiple batteries 90a are capable of storing electricity and are, for example, secondary batteries such as lithium-ion batteries or lead-acid batteries. The plurality of batteries 90a each have a housing formed from a flat steel plate and a plurality of cells arranged inside the housing, with the plurality of cells being electrically connected in series and / or parallel.

[0026] In this embodiment, the battery unit 90 has two batteries 90a. The number of batteries 90a included in the battery unit 90 is not limited to two as long as it is plural, and may be, for example, an even number other than two, or may be three. The multiple batteries 90a are arranged adjacent to each other in the width direction, and are connected to each other by connecting brackets 90b.

[0027] The electric motor 91 is a drive source that rotates a drive shaft 91a using the power output from the battery unit 90. The electric motor 91 is a three-phase AC synchronous motor with embedded permanent magnets. The electric motor 91 has a rotatable rotor and a stator that generates a force to rotate the rotor. The electric motor 91 may be another type of synchronous motor, or may be an AC motor or a DC motor. The electric motor 91 rotates the drive shaft 91a and transmits the driving force from the drive shaft 91a to the hydraulic pump 92.

[0028] The hydraulic pump 92 has an input shaft 92a to which power is input from the drive shaft 91a, and is driven by the power input from the drive shaft 91a to the input shaft 92a to discharge hydraulic oil. The input shaft 92a is connected to the drive shaft 91a of the electric motor 91, and is driven by the driving force transmitted from the drive shaft 91a. In this embodiment, the input shaft 92a is splined. The splines on the input shaft 92a are sometimes referred to as male splines.

[0029] The electrical components 93 are devices that are directly or indirectly connected to the battery unit 90 and transmit power supplied by the battery unit 90 or are operated by the power. The electrical components 93 are, for example, a junction box 93a, an inverter 93b, and a DC / DC converter 93c. The junction box 93a is connected to other devices including the battery unit 90 and the inverter 93b, and transmits power supplied from the battery unit 90 to the other devices.

[0030] The inverter 93b is provided in a power supply path from the battery unit 90 to the electric motor 91, and adjusts the power output to the electric motor 91. The inverter 93b is a device that drives the electric motor 91, converts DC power into three-phase AC power, and supplies the three-phase AC power to the electric motor 91. The inverter 93b can arbitrarily change the current and voltage of the power supplied to the electric motor 91.

[0031] The DC / DC converter 93c converts the voltage of the input direct current into a different voltage. In this embodiment, the DC / DC converter 93c is a step-down converter that converts the input voltage into a lower voltage. The DC / DC converter 93c is provided, for example, in the swing work machine 1, and supplies power to an on-board battery (not shown) that supplies power to electronic devices. The arrangement of the battery unit 90, electric motor 91, hydraulic pump 92, and electrical equipment 93 will be described below. As shown in Fig. 6, the battery unit 90 is arranged in the center of the rear of the swivel bed 2 in the width direction, and more specifically, the battery unit 90 is arranged from the midpoint of the swivel bed 2 in the fore-and-aft direction to the rear of the swivel bed 2. In other words, the rear of the battery unit 90 is located rearward of the rear of the undercarriage 10. Furthermore, as shown in Fig. 2, the center of gravity of the battery unit 90 is arranged on one side (left side) of the center line Y of the swivel bed 2 in the width direction, and the battery unit 90 is arranged rearward of the protection mechanism 85.

[0032] As shown in Fig. 6, the outer periphery of the battery unit 90 is surrounded by a support frame 35. Specifically, the lower ends of the first leg 35a and the second leg 35b are located in front of the battery unit 90. The third leg 35c is located to the left of the battery unit 90. The lower ends of the fourth leg 35d and the fifth leg 35e are located behind the battery unit 90. The upper ends of the first leg 35a, the second leg 35b, the fourth leg 35d, the fifth leg 35e, a pair of support columns 35g, a first rod member 35h, and a second rod member 35i are located above the battery unit 90.

[0033] As shown in FIG. 2, the electric motor 91 and the hydraulic pump 92 are arranged side by side in the front-to-rear direction on the other side (right side) of the center line Y in the width direction of the swivel base 2, and as shown in FIGS. 6 and 7, on the side of the battery unit 90. Specifically, the electric motor 91 and the hydraulic pump 92 are arranged below the side (right side) of the battery unit 90. More specifically, as shown in FIG. 6, the electric motor 91 and the hydraulic pump 92 are arranged to the right of the lower end of the second leg 35b. The electric motor 91 is located rearward of the hydraulic pump 92, and is arranged so that the drive shaft 91a faces in the front-to-rear direction. The hydraulic pump 92 is arranged so that the input shaft 92a faces in the front-to-rear direction, and the axial center line of the input shaft 92a coincides with the axial center line of the drive shaft 91a.

[0034] The hydraulic pump 92 is located in front of the electric motor 91. Furthermore, as shown in Fig. 2, a hydraulic oil tank 94 is disposed in front of the hydraulic pump 92, in which hydraulic oil is stored to be sucked by the hydraulic pump 92. Furthermore, a control valve 95 is provided in front of the hydraulic oil tank 94, in order to adjust the flow rate of hydraulic oil supplied to the hydraulic equipment M. 3 and 7, the electrical equipment 93 is arranged side by side in the width direction above the battery unit 90. In other words, the battery unit 90 is arranged below the electrical equipment 93, and the swivel base 2, battery unit 90, and electrical equipment 93 are arranged in this order from bottom to top. In other words, the battery unit 90, which is relatively heavy, is arranged below the electrical equipment 93, and is located lower in the swivel work machine 1.

[0035] The installation of the battery unit 90, electric motor 91, hydraulic pump 92, and electrical equipment 93 will be described in detail below. As shown in Fig. 7, the swivel working machine 1 includes a support body 50, an upright frame 56, and a support portion 65. The support body 50 is a structure that supports the battery unit 90 on the swivel base 2. Fig. 8 is a left front perspective view of the support body 50. Fig. 9 is a plan view of the support body 50. Fig. 10 is a bottom view of the support body 50.

[0036] As shown in Figures 8, 9, and 10, the support body 50 is made of a thick steel plate or the like. The support body 50 is placed on the swivel base 2 so that the plate surface faces up and down. The support body 50 is fixed to the swivel base 2 via fasteners V such as bolts. In other words, the support body 50 is attached to the swivel base 2 so that its position relative to the swivel base 2 cannot be moved. The support body 50 also has a frame member 51 and a plurality of plate members 52. The frame member 51 is a member that connects the plurality of plate members 52. The frame member 51 connects the plurality of plate members 52 so that the upper surfaces of the plurality of plate members 52 are flush with each other.

[0037] The frame member 51 includes a front frame 51a, a rear frame 51b, and a pair of side frames 51c and 51d. The front frame 51a, the rear frame 51b, and the pair of side frames 51c and 51d are long frames with a substantially L-shaped cross section formed by bending thick steel plates. The front frame 51a forms the front end portion of the frame member 51, and is disposed so that the longitudinal direction coincides with the width direction.

[0038] The rear frame 51b forms the rear end of the frame member 51 and is disposed so that its longitudinal direction coincides with its width direction. The rear frame 51b is disposed spaced apart from the front frame 51a in the front-rear direction. The pair of side frames 51c, 51d are spaced apart in the width direction. The pair of side frames 51c, 51d form one end (left end) and the other end (right end) of the frame member 51 in the width direction, respectively, and are arranged so that their longitudinal directions coincide with the front-to-rear direction. That is, the frame member 51 is formed in a generally parallel-cross shape in a plan view by the front frame 51a, the pair of side frames 51c, 51d, and the rear frame 51b. For this reason, an opening 51E is formed in the center of the frame member 51. Note that the front frame 51a, the pair of side frames 51c, 51d, and the rear frame 51b may each be connected to one another by a plurality of plate members 52, and may be connected to one another directly by welding or the like, or indirectly via a plurality of plate members 52.

[0039] The frame member 51 also includes a pair of mounting brackets 51e. The pair of mounting brackets 51e are provided at one end (left side) and the other end (right side) of the frame member 51 in the width direction. In this embodiment, the pair of mounting brackets 51e are provided at the rear end of the frame member 51. The left mounting bracket 51e connects the rear end of the left side frame 51c to the rear part of the rear frame 51b and extends upward. The right mounting bracket 51e connects the rear end of the right side frame 51d to the rear part of the rear frame 51b and extends upward. The pair of mounting brackets 51e are attached and fixed to the underside of the rear part of the battery unit 90 with fasteners such as bolts.

[0040] The frame member 51 is fixed to the lower surface and / or side surface of the plate member 52 by welding. The plate member 52 is a long, plate-like member on which the outer periphery of the bottom of the battery unit 90 is placed. The mounting surface of the plate member 52 on which the battery unit 90 is placed (the hatched portion in FIG. 8) is machined to be smooth. In other words, the portions of the support body 50 other than the mounting surface of the plate member 52 are not machined. The plate member 52 is machined while fixed to the frame member 51. This makes it possible to remove distortion (welding distortion) that occurs on the mounting surface of the plate member 52 due to welding. In this embodiment, the battery unit 90 is placed on the upper surface of the plate member 52, and therefore the mounting surface is the upper surface of the plate member 52.

[0041] The plurality of plate members 52 are fixed to the frame member 51 at intervals. The bottom and / or side surfaces of the plate members 52 are fixed to the frame member 51 by welding. In this embodiment, the plurality of plate members 52 is made up of four plate members 52, and includes a first plate portion 52a, a second plate portion 52b, a third plate portion 52c, and a fourth plate portion 52d. The number of the plurality of plate members 52 is not limited to four, and may be three or five.

[0042] The first plate portion 52a is where the front end portion of the battery unit 90 is placed. In this embodiment, the front ends of the multiple batteries 90a are placed on the first plate portion 52a. The first plate portion 52a is disposed at the front end portion of the support body 50, and is disposed so that its longitudinal direction coincides with its width direction. The first plate portion 52a is connected to the third plate portion 52c and the fourth plate portion 52d via the front frame 51a.

[0043] The lower surface and / or side surfaces of the first plate portion 52a are fixed to the front frame 51a and the pair of side frames 51c, 51d by welding. In this embodiment, the first plate portion 52a is fixed to the front frame 51a and the pair of side frames 51c, 51d by welding on both the lower surface and the side surfaces. The front portion of the first plate portion 52a is formed with holes 52a1 that penetrate in the vertical direction and notches 52a2 that are cut from the front end toward the rear. A plurality of holes 52a1 are formed across the width of the first plate portion 52a, from one side (left side) to the other side (right side). A plurality of notches 52a2 are formed across the width of the first plate portion 52a, from one side (left side) to the other side (right side). The notches 52a2 are formed between the holes 52a1. Therefore, the first plate portion 52a is formed in a generally comb shape in a plan view.

[0044] The rear end of the battery unit 90 is placed on the second plate portion 52b. In this embodiment, the rear ends of the multiple batteries 90a are placed on the second plate portion 52b. The second plate portion 52b is disposed at the rear end of the support body 50, and is disposed so that its longitudinal direction coincides with its width direction. The second plate portion 52b is connected to the third plate portion 52c and the fourth plate portion 52d via the rear frame 51b.

[0045] The lower surface and / or side surfaces of the second plate portion 52b are fixed to the rear frame 51b and the pair of side frames 51c, 51d by welding. In this embodiment, the second plate portion 52b is fixed to the rear frame 51b and the pair of side frames 51c, 51d by welding on both the lower surface and the side surfaces. One widthwise end (left end) of the battery unit 90 is placed on the third plate portion 52c. The left end of the battery 90a at one widthwise end (left end) of the multiple batteries 90a is placed on the third plate portion 52c. The third plate portion 52c is disposed at the left end of the support body 50, and is disposed so that its longitudinal direction coincides with the front-to-rear direction. The third plate portion 52c is connected to the first plate portion 52a and the second plate portion 52b via a pair of side frames 51c, 51d.

[0046] The bottom surface and / or side surface of the third plate portion 52c is fixed to the front frame 51a and the left side frames 51c and 51d by welding. In this embodiment, the third plate portion 52c is fixed to the front frame 51a and the left side frames 51c and 51d by welding on both the bottom surface and the side surface. The third plate portion 52c also has a first mounting portion 52c1 that is fixed to the swivel base 2 via a fastener V such as a bolt. The first mounting portion 52c1 is a portion that extends outward (leftward) in the width direction and has a hole 52c2 that penetrates in the vertical direction. A fastener V is inserted into the hole 52c2 and fastened to the first base portion 40a. In this embodiment, the first mounting portion 52c1 is formed in a portion near the front end and a portion near the rear end of the third plate portion 52c.

[0047] The other widthwise end (right end) of the battery unit 90 is placed on the fourth plate portion 52d. The right end of the battery 90a at the other widthwise end (right end) of the multiple batteries 90a is placed on the fourth plate portion 52d. The fourth plate portion 52d is disposed at the right end of the support body 50, and is disposed so that its longitudinal direction coincides with the front-to-rear direction. The fourth plate portion 52d is connected to the first plate portion 52a and the second plate portion 52b via a pair of side frames 51c, 51d.

[0048] The lower surface and / or side surface of the fourth plate portion 52d is fixed to the front frame 51a and the right side frames 51c, 51d by welding. In this embodiment, the fourth plate portion 52d is fixed to the front frame 51a and the right side frames 51c, 51d by welding on both the lower surface and the side surface. The fourth plate portion 52d also has a second mounting portion 52d1 that is fixed to the swivel base 2 via a fastener V such as a bolt. The second mounting portion 52d1 extends outward (to the right) in the width direction and has a hole 52d2 that penetrates vertically. A fastener V is inserted through the hole 52d2 and fastened to a fifth base portion 40e provided on the rear right side of the second vertical rib 31b and a sixth base portion 40f attached to the right end of the horizontal rib 34. In this embodiment, the second mounting portion 52d1 is formed at the front end and the rear end of the fourth plate portion 52d. That is, the front second mounting portion 52d1 is formed forward of the front first mounting portion 52c1, and the rear second mounting portion 52d1 is formed rearward of the rear first mounting portion 52c1.

[0049] As shown in FIGS. 8, 9, and 10, the support body 50 includes a first connecting plate 53 and a second connecting plate 54. The first connecting plate 53 is a long frame connecting the widthwise center of the first plate portion 52a and the widthwise center of the second plate portion 52b. The first connecting plate 53 is formed from a thick steel plate that is thinner than the plate members 52, and the rear end of the first connecting plate 53 is connected to the lower surface of the widthwise center of the second plate portion 52b. The rear end of the first connecting plate 53 extends forward from the second plate portion 52b, bends upward, and bends forward again, reaching the first plate portion 52a so that its upper surface is flush with the plate members 52. The lower surface and side surface of the front end of the first connecting plate 53 are fixed to the rear end of the first plate portion 52a by welding. Two adjacent batteries 90a among the plurality of batteries 90a are placed on the first connecting plate 53.

[0050] As shown in FIGS. 8, 9, and 10, the first connecting plate 53 has an air vent 53a formed therein, and the air vent 53a is formed between the two batteries 90a. The air vent 53a is a hole that penetrates in the vertical direction. The width W1 of the air vent 53a is formed to be larger than the length W2 between the batteries 90a. Note that the air vent 53a only needs to overlap at least between the batteries 90a, and the shape, size, and number of the air vent 53a are not limited to the example shown in FIG. 9, etc. For example, the air vent 53a may be formed in a circular shape, a slit shape, a fin shape, or the like.

[0051] 8, 9, and 10, the second connecting plate 54 is a long frame that passes through the center of an opening 51E formed in the center of the frame member 51 and extends from one end (left end) to the other end (right end) in the width direction of the frame member 51. The left end of the second connecting plate 54 is connected to the center in the front-to-rear direction of the third plate portion 52c, and the right end of the second connecting plate 54 is connected to the center in the front-to-rear direction of the fourth plate portion 52d. Therefore, the first connecting plate 53 and the second connecting plate 54 are perpendicular to each other.

[0052] The first connecting plate 53 and the second connecting plate 54 are not machined, and the plate member 52 is machined while it is fixed to the frame member 51 before the first connecting plate 53 and the second connecting plate 54 are attached. 8, the support body 50 has a fixture 55. The fixture 55 is a bracket that is provided on the first plate portion 52a or the second plate portion 52b and that fixes the battery unit 90. The fixture 55 fixes the battery unit 90 together with a pair of mounting brackets 51e. In this embodiment, the fixture 55 is provided on the first plate portion 52a. The fixture 55 is attached so as to be adjustable in the front-rear direction.

[0053] FIG. 11 is a diagram illustrating movement of the fixing device 55. As shown in FIG. 11, the fixing device 55 is attached to the first plate portion 52a by fasteners such as bolts and nuts, and the fasteners are fastened to holes 52a1 formed in the front portion of the first plate portion 52a. Specifically, the fixing device 55 is a member having a generally L-shaped cross section and including a first fixing portion 55a and a second fixing portion 55b extending upward from the first fixing portion 55a. The first fixing portion 55a has a through-hole 55a1 that penetrates in the up-down direction and is elongated in the front-rear direction. Therefore, as shown in FIG. 11, the attachment position of the fixing device 55 can be adjusted in the front-rear direction by changing the position at which the fastener is inserted into the through-hole 55a1. The second fixing portion 55b has a through-hole 55b1 that penetrates in the front-rear direction and is elongated in the width direction. The second fixing portion 55b is attached and fixed to the lower rear side of the battery unit 90 by fasteners such as bolts. When the pair of mounting brackets 51e are provided at the front end of the frame member 51, the fixture 55 is attached to the second plate portion 52b.

[0054] The installation of the electrical equipment 93 will be described in detail below. As shown in Fig. 7, the standing frame 56 has a first standing portion 56L, a second standing portion 56R, and a connecting stay 56U. Fig. 12 is a left rear perspective view showing the support body 50, the first standing portion 56L, the second standing portion 56R, etc. As shown in Fig. 12, the first upright portion 56L stands on top of the third plate portion 52c, and as shown in Fig. 7, supports one side of the battery unit 90. The first upright portion 56L is a plate-like member made of a thick steel plate or the like. Therefore, the first upright portion 56L supports the battery unit 90 in the front-rear direction on one side (left side) in the width direction of the battery unit 90.

[0055] On the other hand, as shown in FIG. 12, the second upright portion 56R stands on top of the fourth plate portion 52d and supports the other side (right side) of the battery unit 90 as shown in FIG. 7. The second upright portion 56R is a plate-shaped member made of a thick steel plate or the like. Therefore, the second upright portion 56R supports the battery unit 90 in the front-rear direction on the other side (right side) of the battery unit 90 in the width direction. In other words, the battery unit 90 is sandwiched between the first upright portion 56L and the second upright portion 56R in the width direction.

[0056] 12, the first upright portion 56L and the second upright portion 56R each have a lower upright portion (anti-vibration portion) 57 and an upper upright portion 58. The lower upright portions 57 are attached to the battery unit 90 in the front-to-rear direction. The lower upright portions 57 are provided on the left and right sides of the support body 50. The lower upright portion 57 of the second upright portion 56R stands between the support portion 65 and the battery unit 90 and is attached to the other side (right surface) of the battery unit 90.

[0057] The lower upright portion 57 of the first upright portion 56L stands on one side (left side) of the battery unit 90 at the top of the support body 50 (swivel base 2), and is attached to one side (left side) of the battery unit 90 separately from the lower upright portion 57 of the second upright portion 56R. In this embodiment, the lower upright portion 57 and the battery unit 90 are attached and fixed with fasteners such as bolts. The lower upright portion 57 has a plurality of openings 57a formed therein, spaced apart in the front-rear direction.

[0058] 12, the upper upright portion 58 is attached to the upper part of the lower upright portion 57. The length of the upper upright portion 58 in the front-to-rear direction decreases from the bottom to the top. That is, the rear end of the upper upright portion 58 forms an inclined portion 58a that transitions from the rear-lower to the front-upper. The front end of the upper upright portion 58 forms an inclined portion 58b that transitions from the front-lower to the rear-upper.

[0059] A plurality of openings 58c are formed at intervals in the front-rear direction in the upper standing portion 58. The upper standing portion 58 and the battery unit 90 are also spaced apart, and a space is formed between the upper standing portion 58 and the battery unit 90. Furthermore, mounting portions 59 to which eyebolts 59A can be attached and detached are formed at the front and rear ends of the upper upright portion 58. This allows the entire assembly to be lifted when the battery unit 90 is placed on the support body 50 and the electrical equipment 93 is attached to the connecting stay 56U, and the unit is then mounted on the swivel base 2.

[0060] 7, the connecting stay 56U is a stay that connects the upper part of the first upright portion 56L and the upper part of the second upright portion 56R and supports the electrical equipment 93. In other words, the connecting stay 56U serves both to reinforce the first upright portion 56L and the second upright portion 56R and to support the electrical equipment 93. Specifically, the connecting stay 56U is formed, for example, from a thick steel plate or the like, and is arranged so that the plate surface faces the up-down direction. The connecting stay 56U is longer in the width direction than in the front-rear direction, and the front-rear direction length is shorter than the front-rear direction length of the battery unit 90.

[0061] 7, electrical components 93 are placed side by side in the width direction on the upper part of the connecting stay 56U. The electrical components 93 are arranged in the following order on the upper part of the connecting stay 56U from one side (left side) in the width direction: an inverter 93b, a junction box 93a, and a DC / DC converter 93c. FIG. 13 is an exploded perspective view of the connecting stay 56U and the electrical equipment 93 as viewed from the left front. As shown in FIG. 13, the electrical equipment 93 and the connecting stay 56U are attached and fixed with fasteners V such as bolts. The electrical equipment 93 may be attached and fixed to the connecting stay 56U via mounting stays 56U1 and 56U2. In this embodiment, the junction box 93a and the DC / DC converter 93c are attached and fixed to the connecting stay 56U via the mounting stays 56U1 and 56U2. The mounting stays 56U1 and 56U2 are formed with holes for attaching and fixing the electrical equipment 93 and the connecting stay 56U with fasteners V such as bolts. Of the holes formed in the mounting stay 56U2 to which at least the junction box 93a is attached, the hole for attaching and fixing the connecting stay 56U with the fasteners V is formed as a long hole that is elongated in the width direction. This makes it possible to prevent a load from being applied to the harness connected to the electrical equipment 93 due to variations in the dimensional tolerances of the electrical equipment 93 and the connecting stay 56U.

[0062] The attachment of the electric motor 91 and the hydraulic pump 92 will be described in detail below. Fig. 14 is a plan view showing the electric motor 91, the support portion 65, and the hydraulic pump 92. As shown in Fig. 14, the rotating work machine 1 includes a connector 60, a first bracket 61, a second bracket 62, and a support portion 65. The electric motor 91 and the hydraulic pump 92 have a drive shaft 91a and an input shaft 92a connected by the connector 60, and are integrally attached to the support portion 65 via the first bracket 61 and the second bracket 62. A structure in which the connector 60 and the first bracket 61 are attached to the electric motor 91 is attached to the support portion 65 via the first bracket 61. Furthermore, a structure in which the second bracket 62 is attached to the hydraulic pump 92 is attached to the support portion 65 via the second bracket 62.

[0063] 15 is an exploded perspective view of the electric motor 91, the connector 60, and the first bracket 61, as seen from the front left. The connector 60 is a coupling that connects the drive shaft 91a and the input shaft 92a. The coupling is provided across the drive shaft 91a and the input shaft 92a, and connects the drive shaft 91a and the input shaft 92a so that they rotate integrally about the same axis. 15, the connector 60 is, for example, a substantially cylindrical member extending in the axial direction of the drive shaft 91a and the input shaft 92a. The connector 60 has, for example, a first connection portion (boss portion) 60a connected to the drive shaft 91a, a second connection portion (flange portion) 60b connected to the input shaft 92a, and an elastic body 60c connecting the first connection portion 60a and the second connection portion 60b. The first connection portion 60a is cylindrical and allows the drive shaft 91a to be inserted therethrough.

[0064] The first connecting portion 60a can fix the inserted drive shaft 91a by a spring pin or enamel set attached to the outer periphery of the first connecting portion 60a. The second connecting portion 60b has a female spline formed thereon that mates with a male spline on the input shaft 92a. The elastic body 60c is made of an elastic material such as rubber, and is connected to the first connecting portion 60a and the second connecting portion 60b by fastening members such as bolts.

[0065] 14, the first bracket (bracket) 61 is separate from the electric motor 91 and connects the electric motor 91 to the support part 65. The first bracket 61 is attached to the support part 65 in a state where it is attached to the electric motor 91 together with the connector 60 in advance. As shown in FIG. 15 , the first bracket 61 is a plate-like member made of a thick steel plate or the like. In this embodiment, the first bracket 61 is formed in a substantially square shape when viewed from the front or rear, and has a first mounting hole (mounting hole) 61a formed in the center. The first mounting hole 61a is a hole through which the drive shaft 91a is inserted, and a first spigot internal fitting portion (spigot internal fitting portion) 91b2 formed around the drive shaft 91a in a housing 91b of the electric motor 91 is attached. The first spigot internal fitting portion 91b2 is formed to protrude from a first flange portion 91b1 formed on the drive shaft 91a side of the housing 91b of the electric motor 91 toward the tip end of the drive shaft 91a. The inner diameter of the first mounting hole 61a is formed smaller than the outer diameter of the connector 60, and the first bracket 61 is attached to the electric motor 91 before the connector 60 is connected to the drive shaft 91a.

[0066] The first bracket 61 has a first connecting portion 61A connected to the electric motor 91, and a first extending portion (extending portion) 61B connected to the support portion 65. The first connecting portion 61A is a portion connected to the first flange portion 91b1, and has a hole 61A1 that penetrates in the axial direction of the drive shaft 91a and through which a fastener V1 such as a bolt is inserted. The first extending portion 61B extends radially outward from the drive shaft 91a further than the first connecting portion 61A. In other words, the first extending portion 61B extends radially outward from the drive shaft 91a further than the electric motor 91. The first extending portion 61B has a first connected portion (connected portion) 61B1 that is connected to the support portion 65. The first connected portion 61B1 is a hole that penetrates the axial direction of the drive shaft 91a and through which a fastener V2 such as a bolt is inserted, and the first bracket 61 and the support portion 65 are connected by the fastener V2. In this embodiment, four first connected portions 61B1 are formed on the first extending portion 61B, one at each vertex of the first extending portion 61B.

[0067] Therefore, the first bracket 61 is attached to the electric motor 91 after the first spigot fitting portion 91b2 is mated with the first mounting hole 61a and the axis of the drive shaft 91a is aligned with the center of the first mounting hole 61a. 14, the second bracket (bracket) 62 is separate from the hydraulic pump 92 and connects the hydraulic pump 92 to the support part 65. The second bracket 62 is attached to the support part 65 in a state where it is attached to the hydraulic pump 92 together with the connector 60 in advance.

[0068] FIG. 16 is an exploded perspective view of the hydraulic pump 92 and the second bracket 62, viewed from the right rear. As shown in FIG. 16, the second bracket 62 is a plate-like member made of a thick steel plate or the like. In this embodiment, the second bracket 62 is formed in a substantially annular shape when viewed from the front or rear, and has a second mounting hole (mounting hole) 62a formed in the center. The second mounting hole 62a is a hole through which the input shaft 92a is inserted, and a second spigot internal fitting portion (spigot internal fitting portion) 92b2 formed around the input shaft 92a in the housing 92b of the hydraulic pump 92 is attached. The second spigot internal fitting portion 92b2 is formed to protrude from a second flange portion 92b1 formed on the input shaft 92a side of the housing 92b of the hydraulic pump 92 toward the tip end of the input shaft 92a. The second bracket 62 is attached to the hydraulic pump 92 before being attached to the support portion 65.

[0069] The second bracket 62 has a second connecting portion 62A connected to the hydraulic pump 92 and a second extending portion (extending portion) 62B connected to the support portion 65. The second connecting portion 62A is a portion connected to the second flange portion 92b1, and is formed with a hole 62A1 that penetrates in the axial direction of the input shaft 92a and into which a fastener V3 such as a bolt is fastened. In the present embodiment, two holes 62A1 are formed in the second connecting portion 62A, one above and one below the input shaft 92a.

[0070] The second extending portion 62B extends radially outward from the input shaft 92a further than the second connecting portion 62A. In other words, the second extending portion 62B extends radially outward from the input shaft 92a further than the hydraulic pump 92. The second extending portion 62B has a second connected portion (connected portion) 62B1 connected to the support portion 65. The second connected portion 62B1 is a hole that penetrates the input shaft 92a in the axial direction and through which a fastener V4 such as a bolt is inserted, and the second bracket 62 and the support portion 65 are connected by the fastener V4. In the present embodiment, three second connected portions 62B1 are formed on the second extending portion 62B, two second connected portions 62B1 are formed on the upper part of the second extending portion 62B, and one second connected portion 62B1 is formed on the lower part of the second extending portion 62B. The second connected portion 62B1 at the bottom of the second extending portion 62B is offset in the width direction from the input shaft 92a, allowing an operator to easily access the tool when attaching the fastener V4 to the second connected portion 62B1 at the bottom of the second extending portion 62B.

[0071] Therefore, the second bracket 62 is attached to the hydraulic pump 92 after the second spigot inner fitting portion 92b2 and the second mounting hole 62a are engaged and the axis of the input shaft 92a is aligned with the center of the second mounting hole 62a. As shown in FIG. 7 , the support portion 65 is a base that supports the electric motor 91 and the hydraulic pump 92 on the swivel base 2 to the side of the battery unit 90. The support portion 65 is separate from the support body, and supports the electric motor 91 and the hydraulic pump 92 on the swivel base 2 at the rear of the swivel base 2. Furthermore, as shown in FIG. 14 , the support portion 65 also serves as a housing that surrounds the radially outer side of the connector 60 in a state in which the electric motor 91 is attached to the support portion 65 via the first bracket 61 and the hydraulic pump 92 is attached to the support portion 65 via the second bracket 62. The support portion 65 connects the electric motor 91 and the hydraulic pump 92 and supports the electric motor 91 and the hydraulic pump 92 aligned in the front-to-rear direction.

[0072] FIG. 17 is a right-rear perspective view showing the support portion 65. FIG. 18 is an exploded perspective view showing the attachment of the first bracket 61 and the like to the support portion 65. FIG. 19 is an exploded perspective view showing the attachment of the second bracket 62 and the like to the support portion 65. As shown in FIGS. 17, 18, and 19, the support portion 65 has a first standing plate 66, a second standing plate 67, a curved portion 68, and a base portion 69. The first standing plate 66 is a plate-like member made of a thick steel plate or the like. The first standing plate 66 is erected so that its plate surface faces the axial direction (front-rear direction) of the drive shaft 91a and the input shaft 92a.

[0073] In this embodiment, the first standing plate 66 is formed in a substantially square shape when viewed from the front or back, and corresponds to the first bracket 61. A first opening 66a, into which the connector 60 is inserted, is formed in the center of the first standing plate 66. In other words, the inner diameter of the first opening 66a is larger than the outer diameter of the connector 60. In addition, a hole 66b, into which a fastener V2 such as a bolt inserted into the first connected portion 61B1 is fastened, is formed in the edge of the first standing plate 66.

[0074] The first standing plate 66 has an edge formed with a notch 66c and a hole 66d to avoid interference with the fastener V1 that connects the electric motor 91 and the first bracket 61. The second upright plate 67 is a plate-like member made of a thick steel plate or the like. The second upright plate 67 is erected so that its plate surface faces the axial direction (front-rear direction) of the drive shaft 91a and the input shaft 92a. The second upright plate 67 is disposed facing the first upright plate 66, spaced apart in the axial direction (front-rear direction) of the drive shaft 91a and the input shaft 92a. When viewed from the front or rear, the second upright plate 67 has a crescent-shaped upper portion and a generally rectangular lower portion, corresponding to the second bracket 62. A second opening 67a corresponding to the first opening 66a is formed in the center of the second upright plate 67. A hole 67b is formed in the edge of the second upright plate 67, into which a fastener V4, such as a bolt, inserted into the second connected portion 62B1 is fastened.

[0075] The curved portion 68 is disposed between the first standing plate 66 and the second standing plate 67, and is a member that connects the first standing plate 66 and the second standing plate 67. The curved portion 68 is a plate-shaped member made of a thick steel plate or the like, and forms an inverted U shape that protrudes upward when viewed from the front or rear. One end (left end) of the curved portion 68 extends upward from the upper surface of the base portion 69, a middle portion of the curved portion 68 curves around the outer periphery of the connector 60, and the other end (right end) of the curved portion 68 reaches the upper surface of the base portion 69.

[0076] The base 69 is a plate-like member made of a thick steel plate or the like, and is arranged so that its plate surface faces up and down. The base 69 supports the first standing plate 66, the second standing plate 67, and the curved portion 68 on the swivel base 2. The base 69 has a central portion 69a where the first standing plate 66, the second standing plate 67, and the curved portion 68 are provided, and a pair of extension portions 69b, 69c extending from the central portion 69a. The central portion 69a has a generally rectangular shape that is elongated in the width direction, and the ends in the width direction extend outward in the width direction beyond the electric motor 91 and the hydraulic pump 92, respectively.

[0077] The pair of extending portions 69b, 69c includes a first extending portion 69b extending rearward from the rear end of the central portion 69a and a second extending portion 69c extending forward from the front end of the central portion 69a. The first extending portion 69b is a member that constitutes the rear end side of the base portion 69 and is formed in a substantially trapezoidal shape in a plan view. The widthwise ends of the first extending portion 69b extend outward in the widthwise direction beyond the electric motor 91 and the hydraulic pump 92, respectively.

[0078] More specifically, an inclined portion 69b1 is formed at the rear end of the first extending portion 69b, which transitions from the front side to the rear side as it moves from the other side (right side) to one side (left side) in the width direction. Therefore, the inclined portion 69b1 is formed in a shape that follows the outline of the right rear portion of the exterior cover 80. Also, an opening 69b2 that penetrates in the up-down direction is formed in the first extending portion 69b. The second extending portion 69c is a member that constitutes the front end side of the base portion 69, and the widthwise ends of the second extending portion 69c extend outward in the widthwise direction further than the electric motor 91 and the hydraulic pump 92. A notch 69c1 is formed in the front end of the second extending portion 69c. The notch 69c1 is a portion that avoids interference with protrusions such as ports provided on the hydraulic pump 92.

[0079] 7 and 14, the support portion 65 is attached to the swivel base 2 via a plurality of mounting devices 70. With the electric motor 91 and the hydraulic pump 92 attached to the support portion 65, the plurality of mounting devices 70 are positioned outward in the width direction from the electric motor 91, the hydraulic pump 92, and the support portion 65 in a plan view. The multiple mounting devices 70 are vibration-damping mechanisms made up of elastically deformable elastic members, etc. As shown in FIG. 14, four multiple mounting devices 70 are provided. As shown in FIG. 7, the multiple mounting devices 70 are attached to fixed brackets 41, 42 attached to the swivel base 2. The number of multiple mounting devices 70 is not limited to four, and may be three or five. In this embodiment, the multiple mounting devices 70 include a pair of rear mounting devices 70a and a pair of front mounting devices 70b.

[0080] As shown in FIG. 14, the pair of rear mounting devices 70a are arranged in pairs in the width direction at the rear end of the first extending portion 69b. The pair of rear mounting devices 70a support one side (left side) and the other side (right side) in the width direction of the rear end of the first extending portion 69b. Therefore, the pair of rear mounting devices 70a are positioned outward in the width direction from the electric motor 91, the hydraulic pump 92, and the support portion 65 in a plan view. Specifically, the centers of nuts N that fasten the pair of rear mounting devices 70a and the first extending portion 69b are positioned outward in the width direction from the electric motor 91, the hydraulic pump 92, and the support portion 65. Furthermore, the pair of rear mounting devices 70a are arranged offset in the front-rear direction.

[0081] The pair of front mounting devices 70b are arranged in pairs in the width direction at the front end of the second extending portion 69c. The pair of front mounting devices 70b support one side (left side) and the other side (right side) in the width direction of the front end of the second extending portion 69c. Therefore, the pair of front mounting devices 70b are positioned outward in the width direction from the electric motor 91, the hydraulic pump 92, and the support portion 65 in a plan view. More specifically, the centers of nuts N that fasten the pair of front mounting devices 70b to the second extending portion 69c are positioned outward in the width direction from the electric motor 91, the hydraulic pump 92, and the support portion 65. Furthermore, the pair of front mounting devices 70b are arranged so that their positions in the front-to-rear direction match.

[0082] 18 and 19, the support portion 65 is provided with knock pins 66e, 67c that are fitted into the first bracket 61 and / or the second bracket 62. As shown in Fig. 18, the first standing plate 66 is provided with a knock pin (first knock pin) 66e that faces in the axial direction of the drive shaft 91a. A plurality of first knock pins 66e are provided on the first standing plate 66, and in this embodiment, two first knock pins 66e are provided on the first standing plate 66.

[0083] Fig. 20 is a rear view of the support portion 65 showing the position of the first knock pin 66e. As shown in Fig. 20, the pair of first knock pins 66e are provided on the edge portion of the first standing plate 66, and are arranged so that a straight line L1 connecting their respective axis centers passes through the axis center of the drive shaft 91a. In this embodiment, one of the first knock pins 66e is provided at the bottom on one side (left side) in the width direction of the first extension portion 61B, and the other first knock pin 66e is provided at the top on the other side (right side) in the width direction of the first extension portion 61B.

[0084] 18, holes (first insertion holes) 61B2 into which the first knock pins 66e are inserted are formed in the first bracket 61. The first insertion holes 61B2 are holes that penetrate in the axial direction of the drive shaft 91a and are formed at positions corresponding to the pair of first knock pins 66e. 19, a knock pin (second knock pin) 67c facing in the axial direction of the input shaft 92a is provided on the second standing plate 67. A plurality of second knock pins 67c are provided on the second standing plate 67, and in this embodiment, two second knock pins 67c are provided on the second standing plate 67.

[0085] 21 is a front view of the support portion 65 showing the position of the second knock pin 67c. As shown in FIG. 21, the pair of second knock pins 67c are provided on the edge portion of the second upright plate 67 and are arranged such that a straight line L2 connecting their respective axis centers is offset with respect to the axis center of the input shaft 92a. In this embodiment, one second knock pin 67c is provided on a portion of the upper part of the second extension portion 62B closer to the other side (right side) in the width direction, and the other second knock pin 67c is provided on a portion of the lower part of the second extension portion 62B closer to the other side (right side) in the width direction. In other words, the pair of second knock pins 67c are provided on the right side of a perpendicular line Z passing through the axis center of the input shaft 92a.

[0086] 19, holes (second insertion holes) 62B2 into which the second knock pins 67c are inserted are formed in the second bracket 62. The second insertion holes 62B2 are holes that penetrate in the axial direction of the input shaft 92a and are formed at positions corresponding to the pair of second knock pins 67c. Furthermore, at least two of the electric motor 91, the first bracket 61, the support portion 65, the second bracket 62, and the hydraulic pump 92 are formed with mounting portions 71 for attaching a suspender 75. In this embodiment, the mounting portions 71 are formed on the electric motor 91, the support portion 65, and the second bracket 62. As a result, by attaching the suspender 75 to the mounting portions 71, it is possible to suspend a connected structure in which the electric motor 91 is connected to the support portion 65 by the first bracket 61 and the hydraulic pump 92 is connected to the support portion 65 by the second bracket 62. In this embodiment, the suspender 75 is an eyebolt, and is detachably attached to the mounting portion 71. Note that the fastening holes formed in the mounting portions 71 and to which the suspender 75 is fastened are common, and the suspender 75 can be shared.

[0087] The electric motor 91 is formed with a pair of mounting portions 71. The pair of mounting portions 71 are formed on the housing 91b of the electric motor 91, at an upper portion of one end (left end) and the other end (right end) in the axial direction of the drive shaft 91a. An attachment portion 71 (second attachment portion 71B) for attaching a suspender 75 (second suspender 75B) is formed on the support portion 65. The second attachment portion 71B is formed to connect the upper portion of the first standing plate 66 and the upper portion of the curved portion 68.

[0088] The second bracket 62 is formed with an attachment portion 71 (first attachment portion 71A) for attaching a suspender 75 (first suspender 75A). The first attachment portion 71A is formed on an upper portion of the second bracket 62. In the above-described embodiment, an example was given in which the mounting portion 71 is formed on the electric motor 91, the support portion 65, and the second bracket 62, but it is sufficient that the mounting portion 71 for attaching the suspension device 75 is formed on at least two or more of the electric motor 91, the first bracket 61, the support portion 65, the second bracket 62, and the hydraulic pump 92, and the mounting portion 71 may be formed on the first bracket 61 or the hydraulic pump 92.

[0089] The assembly of the electric motor 91, hydraulic pump 92, connector 60, first bracket 61, second bracket 62, and support part 65 will be described in detail. First, the assembly of the electric motor 91, connector 60, first bracket 61, and support part 65 will be described. As shown in FIG. 15 , the worker aligns the first mounting hole 61a with the first spigot internal fitting portion 91b2 and attaches the first spigot internal fitting portion 91b2 to the first mounting hole 61a. The worker inserts the fastener V1 into the hole 61A1 of the first coupling part 61A to attach the first bracket 61 to the electric motor 91.

[0090] The worker attaches the connector 60 to the drive shaft 91a of the electric motor 91 to which the first bracket 61 is attached. Specifically, the drive shaft 91a is inserted into the first connection portion 60a of the connector 60, and the drive shaft 91a is fixed by a spring pin. In the following description, the process of attaching the first bracket 61 and connector 60 to the electric motor 91 may be referred to as the "first step" of the process of attaching the electric motor 91 to the support portion 65. Furthermore, the structure including the electric motor 91, first bracket 61, and connector 60 attached in the first step may be referred to as the "first assembly."

[0091] An operator attaches the lifting tool 75 to the pair of mounting portions 71 of the electric motor 91. The operator attaches the hook of a crane installed in a work site such as a factory to the lifting tool 75, and lifts up the first assembly. As shown in FIG. 18 , the worker inserts the connector 60 into the first opening 66a and aligns the first knock pin 66e with the first insertion hole 61B2. At this time, the pair of first knock pins 66e are arranged so that the line L1 connecting their respective axes passes through the axis of the drive shaft 91a. Therefore, the worker can easily align the first knock pin 66e with the first insertion hole 61B2 by swinging the first assembly around the drive shaft 91a. After inserting the first knock pin 66e into the first insertion hole 61B2, the worker inserts the fastener V2 into the first connected portion 61B1 to attach the first bracket 61 to the support part 65. Note that in the following description, the step of attaching the first assembly to the support part 65 described above may be referred to as the “second step” of the step of attaching the electric motor 91 to the support part 65.

[0092] Next, the assembly of the hydraulic pump 92, the connector 60, the second bracket 62, and the support portion 65 will be described. As shown in Fig. 16, the worker aligns the second mounting hole 62a with the second spigot internal fitting portion 92b2 and installs the second mounting hole 62a. As shown in Fig. 16, the worker fastens the fastener V3 to the hole 62A1 through the hole in the second flange portion 92b1, and attaches the second bracket 62 to the hydraulic pump 92.

[0093] In the following description, the step of attaching the second bracket 62 to the hydraulic pump 92 described above may be referred to as the "first step" of the step of attaching the hydraulic pump 92 to the support part 65. Furthermore, the structure including the hydraulic pump 92 and the second bracket 62 attached in the first step may be referred to as the "second assembly." The worker inserts the input shaft 92a into the second connection portion 60b while aligning the second knock pin 67c with the second insertion hole 62B2. At this time, the pair of second knock pins 67c are arranged such that the line L2 connecting their respective axis centers is offset with respect to the axis center of the input shaft 92a. Therefore, when working from one side in the width direction (the left side), the worker can easily align the input shaft 92a with the second connection portion 60b and the second knock pin 67c with the second insertion hole 62B2 without the second knock pin 67c interfering with confirmation of the positions of the input shaft 92a and the second connection portion 60b.

[0094] Note that the worker may attach the first hoisting tool 75A to the first mounting part 71A when attaching the second assembly to the support part 65. The worker can then attach the hook of a crane to the first hoisting tool 75A and lift the second assembly. 19, the worker inserts the fastener V4 into the second connected portion 62B1 and attaches the second bracket 62 to the support portion 65. In the following description, the process of attaching the second assembly to the support portion 65 may be referred to as the "second step" of the process of attaching the hydraulic pump 92 to the support portion 65. Also, the structure including the electric motor 91, the hydraulic pump 92, the connector 60, the first bracket 61, the second bracket 62, and the support portion 65 may be referred to as the "third assembly."

[0095] Then, the worker attaches the first hoisting tool 75A to the first mounting portion 71A and the second hoisting tool 75B to the second mounting portion 71B. The worker attaches the hook of a crane to the first hoisting tool 75A and the second hoisting tool 75B, and can lift the third assembly. FIG. 22 is a right-rear perspective view showing the installation of the third assembly. The worker uses the crane to move the third assembly to the fixing brackets 41, 42 on the swivel base 2 and aligns the multiple mount devices 70 with the support portion 65 as shown in FIG. 22. The worker fastens the pair of rear mount devices 70a to the first extension portion 69b and fastens the pair of front mount devices 70b to the second extension portion 69c with nuts N.

[0096] In the above-described embodiment, an example was given in which the support portion 65 has a knock pin (first knock pin) 66e and a knock pin (second knock pin) 67c, and the first bracket 61 and the second bracket 62 are aligned with the support portion 65. However, instead of the knock pins 66e and 67c, a configuration may be adopted in which the first bracket 61 and the second bracket 62 are aligned with the support portion 65 using a different member.

[0097] Fig. 23 is an exploded perspective view of the electric motor 91, connector 60, and first bracket 61 in the modified example, as viewed from the front left. Fig. 24 is an exploded perspective view of the hydraulic pump 92 and second bracket 62 in the modified example, as viewed from the rear right. Fig. 25 is a rear right perspective view showing the attachment of the first assembly and second assembly to the support part 65 in the modified example. As shown in FIG. 23, the first bracket 61 in this modified example has a third spigot internal fitting portion (spigot internal fitting portion) 61C. The third spigot internal fitting portion 61C is formed on the opposite side (front side) of the electric motor 91 from the first connecting portion 61A, protruding toward the tip end of the drive shaft 91a. The third spigot internal fitting portion 61C is an annular rib, and the outer diameter of the third spigot internal fitting portion 61C is approximately the same as the inner diameter of the first opening 66a. As shown in FIG. 25, the third spigot internal fitting portion 61C is attached to the first opening 66a. The inner diameter of the third spigot internal fitting portion 61C is larger than the outer diameter of the connector 60. Therefore, the third spigot internal fitting portion 61C may be able to accommodate a portion of the connector 60 therein. In this case, the space between the connector 60 and the drive shaft 91a can be covered with the third spigot inner fitting portion 61C, thereby improving the dustproofness between the connector 60 and the drive shaft 91a.

[0098] Furthermore, in the first bracket 61 in the modified example, unlike the first bracket 61 shown in Figure 15, etc., the first connected portion 61B1 formed on the lower side of the first connected portion 61B1 formed on the first extension portion 61B is formed offset closer to the hole 61A1 formed in the center in the vertical direction than the hole 61A1 formed on the lower side. Furthermore, in the first bracket 61 in the modified example, unlike the first bracket 61 shown in Fig. 15 etc., among the first connected portions 61B1 formed on the first extending portion 61B, any of the first connected portions 61B1 is formed to be offset outward in the width direction relative to the hole 61A1. In the example shown in Figs. 23 and 25, among the first connected portions 61B1 formed on the first extending portion 61B, the first connected portion 61B1 on the lower side and outward in the width direction (right) is formed to be offset outward in the width direction (right) relative to the hole 61A1.

[0099] Therefore, since the first connected portion 61B1 is positioned outward in the width direction relative to the electric motor 91, etc., the worker can easily access the tool when attaching the fastener V2 to the first connected portion 61B1. As shown in Fig. 24, the second bracket 62 in this modified example has a fourth spigot internal fitting portion (spigot internal fitting portion) 62C. The fourth spigot internal fitting portion 62C is formed on the opposite side (rearward) of the hydraulic pump 92 from the second connecting portion 62A, protruding toward the tip end of the input shaft 92a. The fourth spigot internal fitting portion 62C has a cylindrical shape. The outer diameter of the fourth spigot internal fitting portion 62C is approximately the same as the inner diameter of the second opening 67a, and as shown in Fig. 25, the fourth spigot internal fitting portion 62C is attached to the second opening 67a.

[0100] The above-mentioned swivel work machine 1 comprises a swivel base 2, a battery unit 90, an electric motor 91 that rotates a drive shaft 91a using power output from the battery unit 90, a hydraulic pump 92 that has an input shaft 92a to which power is input from the drive shaft 91a and is driven by power input from the drive shaft 91a to the input shaft 92a to discharge hydraulic oil, a connector 60 that connects the drive shaft 91a and the input shaft 92a, a support part 65 that supports the electric motor 91 and the hydraulic pump 92 on the swivel base 2, and a bracket (first bracket) 61 that is separate from the electric motor 91 and connects the electric motor 91 to the support part 65, and a structure (first assembly) in which the connector 60 and the first bracket 61 are attached to the electric motor 91 is attached to the support part 65 via the first bracket 61.

[0101] According to the above configuration, the electric motor 91 can be easily attached to the support portion 65 regardless of the shape of the electric motor 91 or the shape of the support portion 65. Furthermore, by attaching the connector 60 to the electric motor 91 in advance, it is possible to easily align it with the drive shaft 91a. Therefore, the power output from the drive shaft 91a to the input shaft 92a can be appropriately transmitted without loss. This reduces loss, thereby extending the driving time of the electric motor 91.

[0102] In addition, the electric motor 91 has a spigot internal fitting portion (first spigot internal fitting portion) 91b2 formed around the drive shaft 91a, and the first bracket 61 has a mounting hole (first mounting hole) 61a formed therein into which the first spigot internal fitting portion 91b2 is mounted. According to the above configuration, it is possible to prevent the drive shaft 91a from shifting in position relative to the first bracket 61, and to connect the drive shaft 91a, the connector 60, and the input shaft 92a with high precision. As a result, the power output from the drive shaft 91a to the input shaft 92a can be transmitted appropriately without loss.

[0103] The outer diameter of the connector 60 is larger than the inner diameter of the first mounting hole 61a. According to the above configuration, a relatively large connector 60 can be used regardless of the inner diameter of the first mounting hole 61a, and the power output from the drive shaft 91a to the input shaft 92a can be transmitted appropriately without loss. Also, by attaching the first bracket 61 and the connector 60 to the electric motor 91 in advance and then attaching them to the support part 65, alignment with the drive shaft 91a can be made easier than if the connector 60 were attached after the electric motor 91 was attached to the support part 65.

[0104] In addition, in a state in which the electric motor 91 is attached to the support part 65 via the first bracket 61, the support part 65 is a housing that surrounds the connector 60 radially outward. According to the above configuration, the support part 65 can support the electric motor 91 and cover the connector 60. This prevents the connector 60, which is rotated by the drive shaft 91a, from coming into contact with the outside. Furthermore, by attaching the first bracket 61 and the connector 60 to the electric motor 91 in advance and then attaching them to the support part 65, it is easier to align the electric motor 91 with the drive shaft 91a than if the connector 60 were attached after the electric motor 91 was attached to the support part 65.

[0105] In addition, the first bracket 61 has an extension portion (first extension portion) 61B that extends radially outward from the drive shaft 91a beyond the electric motor 91, and the first extension portion 61B has a connected portion (first connected portion) 61B1 that is connected to the support portion 65. According to the above configuration, it is possible to ensure an area for connecting the first bracket 61 and the support portion 65, regardless of the shapes of the electric motor 91 and the support portion 65. This makes it possible to easily attach the electric motor 91 to the support portion 65.

[0106] The first connected portion 61B1 is a hole through which the fastener V2 is inserted, and the first bracket 61 and the support portion 65 are connected by the fastener V2. According to the above configuration, the first bracket 61 can be easily and reliably attached to the support portion 65. Furthermore, since the first extension portion 61B extends radially outward of the drive shaft 91a beyond the electric motor 91, a sufficient area can be secured for operating a tool for attaching the fastener V2.

[0107] In addition, the support portion 65 is provided with a knock pin (first knock pin) 66e facing in the axial direction of the drive shaft 91a, and the first bracket 61 is formed with a hole (first insertion hole) 61a into which the first knock pin 66e is inserted. According to the above configuration, it is possible to prevent the drive shaft 91a from shifting in position relative to the support portion 65, and to connect the drive shaft 91a, the connector 60, and the input shaft 92a with high precision. As a result, the power output from the drive shaft 91a to the input shaft 92a can be transmitted appropriately without loss.

[0108] The first bracket 61 is also formed with a mounting portion 71 for mounting a suspender 75 thereon. According to the above configuration, when attaching the first bracket 61 and the connector 60 to the support part 65 while attached to the electric motor 91, they can be lifted up by the lifting tool 75. Therefore, the first bracket 61, the connector 60, and the electric motor 91 can be easily attached to the support part 65.

[0109] In addition, a connector 60 and a first bracket 61 are attached to the electric motor 91, and a structure (second assembly) in which a hydraulic pump 92 is attached to a bracket (second bracket) 62 separate from the first bracket 61 is attached to the support part 65 via the second bracket 62. According to the above configuration, the hydraulic pump 92 can be easily attached to the support portion 65 regardless of the shape of the hydraulic pump 92 or the shape of the support portion 65 .

[0110] In addition, the method of assembling the swivel working machine 1 is a method of assembling the swivel working machine 1 which includes an electric motor 91 that rotates a drive shaft 91a, a hydraulic pump 92 having an input shaft 92a to which power is input from the drive shaft 91a and which is driven by the power input from the drive shaft 91a to the input shaft 92a, a connector 60 that connects the drive shaft 91a and the input shaft 92a, a support part 65 that supports the electric motor 91 and the hydraulic pump 92, and a first bracket 61 that is separate from the electric motor 91 and connects the electric motor 91 to the support part 65, and includes a first step of attaching the first bracket 61 and the connector 60 to the electric motor 91, and a second step of attaching the first bracket 61, the connector 60, and the electric motor 91 attached in the first step to the support part 65.

[0111] According to the above configuration, the electric motor 91 can be easily attached to the support portion 65 regardless of the shape of the electric motor 91 or the shape of the support portion 65. Furthermore, by attaching the connector 60 to the electric motor 91 in advance, it is possible to easily align it with the drive shaft 91a. The above-mentioned swivel work machine 1 comprises a swivel base 2, a battery unit 90, an electric motor 91 that rotates a drive shaft 91a using power output from the battery unit 90, a hydraulic pump 92 that has an input shaft 92a to which power is input from the drive shaft 91a and is driven by the power input from the drive shaft 91a to the input shaft 92a to discharge hydraulic oil, a support part 65 that supports the electric motor 91 and the hydraulic pump 92 on the swivel base 2, and a bracket (second bracket) 62 that is separate from the hydraulic pump 92 and connects the hydraulic pump 92 to the support part 65, and a structure (second assembly) in which the second bracket 62 is attached to the hydraulic pump 92 is attached to the support part 65 via the second bracket 62.

[0112] According to the above configuration, the hydraulic pump 92 can be easily attached to the support portion 65 regardless of the shape of the hydraulic pump 92 or the shape of the support portion 65 . In addition, the second bracket 62 has an extension portion (second extension portion) 62B that extends radially outward from the input shaft 92a further than the hydraulic pump 92, and the second extension portion 62B has a connected portion (second connected portion) 62B1 that is connected to the support portion 65.

[0113] According to the above configuration, it is possible to ensure an area for connecting the second bracket 62 and the support portion 65, regardless of the shapes of the hydraulic pump 92 and the support portion 65. This makes it possible to easily attach the hydraulic pump 92 to the support portion 65. The second connected portion 62B1 is a hole through which the fastener V4 is inserted, and the second bracket 62 and the support portion 65 are connected by the fastener V4.

[0114] According to the above configuration, the second bracket 62 can be easily and reliably attached to the support portion 65. Furthermore, since the second extension portion 62B extends radially outward of the drive shaft 91a beyond the hydraulic pump 92, a sufficient area can be secured for manipulating a tool for attaching the fastener V4. In addition, the support portion 65 is provided with a knock pin (second knock pin) 67c facing in the axial direction of the input shaft 92a, and the second bracket 62 is formed with a hole (second insertion hole) 62B2 into which the second knock pin 67c is inserted.

[0115] According to the above configuration, it is possible to prevent the input shaft 92a from being misaligned with the support portion 65, and it is possible to connect the drive shaft 91a, the connector 60, and the input shaft 92a with high precision. As a result, it is possible to appropriately transmit the power output from the drive shaft 91a to the input shaft 92a without loss. The second bracket 62 is also formed with a first attachment portion 71A for attaching a first hanger 75A.

[0116] According to the above configuration, when attaching the second bracket 62 attached to the hydraulic pump 92 to the support part 65, the second bracket 62 can be lifted up by the first lifting tool 75A. Therefore, the second bracket 62 and the hydraulic pump 92 can be easily attached to the support part 65. Furthermore, by lifting the first lifting tool 75A, the electric motor 91 and the hydraulic pump 92 can be easily transported in a state where they are assembled to the support part 65.

[0117] Furthermore, the support portion 65 is formed with a second attachment portion 71B for attaching a second hanger 75B. According to the above configuration, the electric motor 91 and the hydraulic pump 92 can be easily transported in a state where they are attached to the support portion 65 by lifting the second lifting tool 75B in addition to the first lifting tool 75A.

[0118] In addition, the hydraulic pump 92 has a spigot internal fitting portion (second spigot internal fitting portion) 92b2 formed around the input shaft 92a, and the second bracket 62 has a mounting hole (second mounting hole) 62a formed therein into which the second spigot internal fitting portion 92b2 is mounted. According to the above configuration, it is possible to prevent the drive shaft 91a from shifting in position relative to the second bracket 62, and to connect the drive shaft 91a, the connector 60, and the input shaft 92a with high precision. As a result, the power output from the drive shaft 91a to the input shaft 92a can be transmitted appropriately without loss.

[0119] The slewing work machine 1 also has a connecting device 60 that connects the drive shaft 91a and the input shaft 92a, and when the hydraulic pump 92 is attached to the support part 65 via the second bracket 62 and the connecting device 60 is attached to the input shaft 92a, the support part 65 is a housing that surrounds the radially outer side of the connecting device 60. According to the above configuration, the support portion 65 can support the hydraulic pump 92 and also cover the connector 60. This makes it possible to prevent the connector 60, which is rotated by the drive shaft 91a, from coming into contact with the outside.

[0120] In addition, the method of assembling the swivel working machine 1 is a method of assembling the swivel working machine 1 which is equipped with an electric motor 91 that rotates a drive shaft 91a, a hydraulic pump 92 which has an input shaft 92a to which power is input from the drive shaft 91a and is driven by the power input from the drive shaft 91a to the input shaft 92a to discharge hydraulic oil, a support part 65 that supports the electric motor 91 and the hydraulic pump 92, and a second bracket 62 that is separate from the hydraulic pump 92 and connects the hydraulic pump 92 to the support part 65, and includes a first step of attaching the second bracket 62 to the hydraulic pump 92, and a second step of attaching the second bracket 62 and hydraulic pump 92 attached in the first step to the support part 65.

[0121] According to the above configuration, the hydraulic pump 92 can be easily attached to the support portion 65 regardless of the shape of the hydraulic pump 92 or the shape of the support portion 65 . The above-mentioned swivel work machine 1 comprises a swivel base 2, a battery unit 90, a support body 50 that supports the battery unit 90 on the swivel base 2, an electric motor 91 that is driven by the power output by the battery unit 90, a hydraulic pump 92 that is driven by the electric motor 91 and discharges hydraulic oil, and a support part 65 that supports the electric motor 91 and the hydraulic pump 92 on the swivel base, and the support part 65 is separate from the support body 50 and is attached to the swivel base 2 via a plurality of mounting devices 70.

[0122] According to the above configuration, the support portion 65 supports the electric motor 91 and the hydraulic pump 92 separately from the battery unit 90, thereby preventing vibrations generated by driving the electric motor 91 and pulsation of the hydraulic pump 92 from being directly transmitted to the battery unit 90. Furthermore, because the assembly of the battery unit 90 and the assembly of the electric motor 91 and the hydraulic pump 92 are configured separately, assembly to the swivel base 2 is facilitated. Furthermore, vibrations generated by driving the electric motor 91 and pulsation of the hydraulic pump 92 can be prevented from reaching the battery unit 90 via the support portion 65 and the swivel base 2. This prevents the battery unit 90 from resonating with the vibrations and pulsations, amplifying the vibrations and generating noise.

[0123] Furthermore, the support 50 is fixed to the swivel base 2 . According to the above configuration, the battery unit 90 placed on the support body 50 is fixed to the swivel base 2, so when vibrations are transmitted from the swivel base 2, the battery unit 90 does not vibrate independently of the swivel base 2, but vibrates together with the swivel base 2. This prevents the battery unit 90 from resonating with the vibrations and pulsations, amplifying the vibrations and generating noise.

[0124] The rotating work machine 1 also includes an anti-sway portion (lower upright portion) 57 that stands on the upper part of the support body 50 and is attached to at least one of one side surface and the other side surface of the battery unit 90. According to the above configuration, the battery unit 90 can be more firmly fixed to the support body 50. Therefore, since the battery unit 90 can be firmly fixed to the swivel base 2, when vibrations are transmitted from the swivel base 2, the battery unit 90 does not vibrate independently of the swivel base 2, and the battery unit 90 resonates with the vibrations and pulsations, amplifying the vibrations and generating noise.

[0125] In addition, the support portion 65 supports the electric motor 91 and the hydraulic pump 92 in a line in the front-to-rear direction, and the multiple mounting devices 70 are positioned widthwise outward of the electric motor 91, the hydraulic pump 92, and the support portion 65 in a plan view when the electric motor 91 and the hydraulic pump 92 are attached to the support portion 65. According to the above configuration, the multiple mount devices 70 can suppress vibrations in the width direction when the swivel base 2 rotates, and can more appropriately support the electric motor 91, the hydraulic pump 92, and the support portion 65. In addition, when attaching the multiple mount devices 70 to the support portion 65, tools can be easily accessed.

[0126] The battery unit 90 is disposed at the center of the rear of the swivel base 2 in the width direction, and the electric motor 91 and the hydraulic pump 92 are disposed on the side of the battery unit 90 via the support portion 65 . According to the above configuration, the electric motor 91 and the hydraulic pump 92 supported by the multiple mount devices 70 can be preferentially arranged in a portion of the swivel base 2 where vibrations are relatively large. This improves the durability of the equipment arranged on the swivel base 2, while reducing the number and size of the mount devices 70, thereby reducing costs.

[0127] In addition, the slewing work machine 1 is equipped with a first bracket 61 that is separate from the electric motor 91 and connects the electric motor 91 to the support part 65, and a second bracket 62 that is separate from the hydraulic pump 92 and connects the hydraulic pump 92 to the support part 65, and at least two of the electric motor 91, the first bracket 61, the support part 65, the second bracket 62, and the hydraulic pump 92 are formed with mounting parts 71 for attaching a hoisting device 75, and by attaching the hoisting device 75 to the mounting parts 71, it is possible to suspend a connected structure in which the electric motor 91 is connected to the support part 65 by the first bracket 61 and the hydraulic pump 92 is connected to the support part 65 by the second bracket 62.

[0128] According to the above configuration, the assembly including the electric motor 91, the first bracket 61, the support portion 65, the second bracket 62, and the hydraulic pump 92 can be easily transported to the multiple mounting devices 70 by lifting it with the lifting tool 75. This makes it possible to easily assemble the assembly to the multiple mounting devices 70. The above-mentioned electric work machine 1 comprises a body (swivel) 2, a support body 50 provided on the swivel body 2, a battery unit 90 mounted on the support body 50, and an electric motor 91 driven by the power output by the battery unit 90, and the support body 50 has a plurality of long plate members 52 on which the outer periphery of the bottom of the battery unit 90 is placed, and the mounting surface of the plate members 52 on which the battery unit 90 is placed is machined to be smooth.

[0129] According to the above configuration, the battery unit 90 can be supported with a simple configuration in which long plate members 52 are combined, and the battery unit 90 can be stably supported while reducing the area that requires machining. Furthermore, the portions of the support body 50 other than the mounting surface of the plate member 52 are not machined.

[0130] According to the above configuration, it is possible to reduce the increase in processing costs that would otherwise be caused by performing machining over a wide area. The support body 50 also has a frame member 51 that connects the plurality of plate members 52, and the frame member 51 is fixed to the lower surface and / or the side surface of the plate members 52 by welding. According to the above-described configuration, even if the mounting surface is machined, the plurality of plate members 52 can be reliably supported without scraping off the welded portions.

[0131] Furthermore, the plurality of plate members 52 are fixed to the frame member 51 at intervals. According to the above configuration, a welding allowance between the plate members 52 and the frame member 51 can be ensured. The plate member 52 is machined while being fixed to the frame member 51 by welding.

[0132] According to the above configuration, even if welding distortion occurs in the plate member 52 due to welding, the battery unit can be reliably supported. The plurality of plate members 52 also include a first plate portion 52a on which the front end of the battery unit 90 is placed, a second plate portion 52b on which the rear end of the battery unit 90 is placed, a third plate portion 52c on which one widthwise end of the battery unit 90 is placed, and a fourth plate portion 52d on which the other widthwise end of the battery unit 90 is placed.

[0133] According to the above configuration, the machined plate member 52 can reliably and easily support the battery unit 90. The support body 50 also has a long first connecting plate 53 that connects the center of the first plate portion 52a in the width direction and the center of the second plate portion 52b in the width direction. According to the above configuration, the strength of the connection between the first plate portion 52a and the second plate portion 52b can be improved with a simple configuration.

[0134] In addition, the support body 50 has a second connecting plate 54 that passes through the center of an opening 51E formed in the center of the frame member 51 and extends from one end to the other end in the width direction of the frame member 51, and the first connecting plate 53 and the second connecting plate 54 are perpendicular to each other. According to the above-described configuration, the strength of the frame member 51 can be improved with a simple configuration. The battery unit 90 also has a plurality of batteries 90a, which are arranged adjacent to each other in the width direction, with the front ends of the plurality of batteries 90a being placed on the first plate portion 52a, the rear ends of the plurality of batteries 90a being placed on the second plate portion 52b, one end of a battery at one end in the width direction among the plurality of batteries 90a being placed on the third plate portion 52c, and the other end of a battery at the other end in the width direction among the plurality of batteries 90a being placed on the fourth plate portion 52d.

[0135] According to the above configuration, a plurality of batteries 90a can be supported with a simple configuration in which long plate members 52 are combined, and stable support can be achieved while reducing the area that requires machining. The battery unit 90 also has a plurality of batteries 90a, and the first connecting plate 53 has adjacent two of the plurality of batteries 90a mounted thereon, and an air vent 53a is formed between the two batteries 90a.

[0136] According to the above configuration, the two batteries 90a can be reliably supported while heat can be dissipated between the batteries 90a, thereby achieving both support and cooling of the batteries 90a. The support body 50 has a fixture 55 that is provided on the first plate portion 52a or the second plate portion 52b and that fixes the battery unit 90, and the fixture 55 is attached so as to be adjustable in the front-rear direction.

[0137] According to the above configuration, the battery unit 90 can be reliably fixed regardless of dimensional errors of the battery unit 90. The electric work machine 1 also includes a hydraulic device M provided on the swivel base 2, and a hydraulic pump 92 that discharges hydraulic oil to operate the hydraulic device M when driven by the electric motor 91. According to the above configuration, the above-mentioned unique effects can be achieved even in an electric working machine 1 having a working device 20 driven by hydraulic oil.

[0138] Although the present invention has been described above, the embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. For example, in the above embodiment, the present invention is applied to a backhoe, which is a rotating work machine, but the application of the present invention is not limited to this and can be applied to various types of work machines, such as various construction machines, civil engineering machines, and agricultural machines.

[0139] Furthermore, in the above-described embodiment, the travel motors ML, MR, swing motor MT, and each part of the working device 20 are hydraulically driven, i.e., driven by the driving force of the electric motor 91 via hydraulic oil. However, this is not limiting, and some or all of these may be directly driven by the electric motor (electric actuator) 91. [Explanation of symbols]

[0140] 1 Electric work machine (swivel work machine) 2. Aircraft (swivel) 20 Work equipment 50 Support 51 Frame members 51E Aperture 52 Plate members 52a 1st plate part 52b Second plate section 52c 3rd plate part 52d 4th plate section 53 1st connection plate 53a Ventilation hole 54 2nd connecting plate 55 Fixtures 90 Battery Unit 90a battery 91 Electric motor 92 Hydraulic pump M Hydraulic Equipment

Claims

1. The aircraft and A support provided on the airframe; a battery unit mounted on the support; an electric motor driven by the power output from the battery unit; Equipped with the support body has a plurality of elongated plate members on which an outer periphery of a bottom of the battery unit is placed, and a frame member connecting the plurality of plate members; the frame member is fixed to the bottom surface and / or side surface of the plate member by welding; The mounting surface of the plate member on which the battery unit is mounted is machined to be smooth, The plate member is fixed to the frame member by welding and is then machined.

2. The electric operating machine according to claim 1 , wherein the portion of the support body other than the mounting surface of the plate member is not machined.

3. The electric operating machine according to claim 1 , wherein the plurality of plate members are fixed to the frame member at intervals from one another.

4. The plurality of plate members include: a first plate portion on which a front end portion of the battery unit is placed; a second plate portion on which a rear end portion of the battery unit is placed; a third plate portion on which one end of the battery unit in the width direction is placed; a fourth plate portion on which the other end portion of the battery unit in the width direction is placed; The electric operating machine according to any one of claims 1 to 3, comprising:

5. The electric operating machine according to claim 4, wherein the support body has a long first connecting plate that connects the center of the first plate portion in the width direction to the center of the second plate portion in the width direction.

6. The support passes through the center of an opening formed in the center of the frame member and is a second connecting plate extending from one end to the other end in the width direction of the frame member; The electric operating machine according to claim 5 , wherein the first connecting plate and the second connecting plate are perpendicular to each other.

7. the battery unit includes a plurality of batteries; The plurality of batteries are arranged adjacent to each other in the width direction, The first plate portion is provided with front ends of the plurality of batteries, rear ends of the batteries are placed on the second plate portion, The third plate portion is configured to receive one end of a battery located at one end in the width direction among the plurality of batteries, The electric operating machine according to claim 5 or 6, wherein the fourth plate portion is provided with the other end of the battery at the other end in the width direction among the plurality of batteries.

8. the battery unit includes a plurality of batteries; The electric operating machine according to any one of claims 5 to 7, wherein the first connecting plate has two adjacent batteries of the plurality of batteries mounted thereon, and an air vent is formed between the two batteries.

9. The support is a fixing member provided on the first plate portion or the second plate portion and configured to fix the battery unit; The electric operating machine according to any one of claims 4 to 8, wherein the fixing device is attached so as to be adjustable in the front-rear direction.

10. a hydraulic device provided on the aircraft body; a hydraulic pump that discharges hydraulic oil for operating the hydraulic device by being driven by the electric motor; The electric operating machine according to any one of claims 1 to 9, comprising:

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