JP2023150765A - Electric work machine - Google Patents

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

The present invention relates to electric working machines such as backhoes.

The work vehicle disclosed in Patent Document 1 includes a swivel frame, a hydraulic device provided on the swivel frame, a battery provided on the swivel frame, and a swivel frame arranged on the swivel frame, and a hydraulic device provided on the swivel frame. includes an electric motor that rotates an output shaft using the electric power output from the swivel frame, and a hydraulic pump that is disposed on the swivel frame and discharges hydraulic oil that operates the hydraulic equipment, and the battery is connected to the main secondary battery and the auxiliary battery. It consists of a secondary battery, and the hydraulic pump, electric motor, and main secondary battery are arranged on the rear part of the swivel frame, and the auxiliary secondary battery is arranged on the side of the swivel frame.

Japanese Patent Application Publication No. 2011-89369

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 a plurality of rectangular parallelepiped battery packs and the area where the battery is disposed on the swivel frame is relatively wide, as in the working vehicle of Patent Document 1, the area to be machined also becomes large. For this reason, a long processing time is required, and the processing cost for the location where the battery is mounted increases.

The present invention has been made to solve the problems of the prior art, and aims to provide an electric working machine that can reduce processing costs and reliably support a battery unit.

The electric working 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 body has a plurality of elongated plate members on which the outer periphery of the bottom of the battery unit is placed, and the placement surface of the plate member on which the battery unit is placed is smooth. machined.

According to the electric working machine, processing costs can be reduced and the battery unit can be reliably supported.

FIG. 2 is a schematic side view showing the swing working machine. FIG. 2 is a schematic plan view showing a swing work machine. FIG. 2 is a schematic rear view showing the swing working machine. FIG. 3 is a front left perspective view showing the swivel base. FIG. 3 is a right rear perspective view showing the swivel base. FIG. 3 is a plan view showing an undercarriage, a rotating base, and various devices arranged on the rotating base. FIG. 2 is a right front perspective view showing a rotating board, a battery unit, an electric motor, a hydraulic pump, and electrical components. It is a left front perspective view which shows a support body. It is a top view which shows a support body. It is a bottom view which shows a support body. It is a figure explaining movement of a fixture. It is a left rear perspective view which shows a support body, a 1st erected part, a 2nd erected part, etc. FIG. 3 is an exploded perspective view of the connecting stay and the electrical components seen from the left front. It is a top view showing an electric motor, a support part, and a hydraulic pump. FIG. 3 is an exploded perspective view of the electric motor, the connector, and the first bracket viewed from the front left. It is an exploded perspective view of a hydraulic pump and a second bracket seen from the right rear. It is a right front perspective view which shows a support part. FIG. 3 is an exploded perspective view showing how the first bracket and the like are attached to the support section. FIG. 7 is an exploded perspective view showing how the second bracket and the like are attached to the support section. FIG. 3 is a rear view of the support section showing the position of the first knock pin. It is a front view of the support part which shows the position of a 2nd knock pin. It is a right rear perspective view which shows attachment of a 3rd assembly. It is an exploded perspective view of an electric motor, a connection tool, and a first bracket in a modification seen from the left front. It is an exploded perspective view of a hydraulic pump and a second bracket in a modification seen from the right rear. It is a right rear perspective view which shows attachment of the 1st assembly and 2nd assembly to the support part in a modification.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing a swing working machine 1. As shown in FIG. FIG. 2 is a schematic plan view showing the swing working machine 1. As shown in FIG. FIG. 3 is a schematic rear view showing the swing working machine 1. As shown in FIG. First, the overall configuration of the swing work machine 1 will be explained. As shown in FIG. 1, the swing work machine 1 is, for example, a backhoe or the like that includes a swing base (body) 2, a lower traveling body 10, and a work device 20. Further, the swing work machine 1 is an electric work machine driven by electric power. A driver's seat 8 for a driver to sit on is provided on the swivel base 2, and the periphery of the driver's seat 8 is covered by a protection mechanism 85.

In addition, in this embodiment, the direction in which the driver seated in the driver's seat 8 of the swing work machine 1 faces (arrow A1 direction in FIGS. 1, 2, etc.) is the forward direction, and the opposite direction (in the direction of arrow A1 in FIGS. 1, 2, etc.) The direction of arrow A2) is called backward. Also, the left side of the driver (the near side in Figure 1, the direction of arrow B1 in Figures 2 and 3, etc.) is the left side, and the right side of the driver (the back side of Figure 1, the direction of arrow B2 in Figures 2 and 3, etc.) is called the right side. In addition, the horizontal direction that is orthogonal to the front-rear direction is called the width direction (see Figures 2 and 3), and the direction from the center of the swivel base 2 in the width direction to the right or left part is called the width direction outside. It's called Ho.

As shown in FIGS. 1 and 3, the swivel base 2 is rotatable around a pivot axis (vertical axis) X extending in the vertical direction. Specifically, the swivel base 2 is supported on the lower traveling body 10 via a swivel bearing 3 so as to be rotatable around the swivel axis X (swivelable to the left and right). The center of the swing bearing 3 is a swing axis X (swing center), and a swing motor (not shown) is attached to the swing base 2 . This swing motor is a hydraulic device M driven by hydraulic oil discharged by the hydraulic pump 92, and is a motor that drives the swing table 2 to rotate around the swing axis X. The swivel base 2 is provided with an exterior cover (cover) 80, a bracket, a stay, and the like. The exterior cover 80 forms a space (rear room) R in the rear of the swivel base 2 in which equipment, tanks, other parts, etc. are arranged. Brackets, stays, and the like are members to which the above-mentioned parts and the like are attached.

As shown in FIGS. 1 and 3, the lower traveling body 10 includes a traveling frame 11 and a traveling mechanism 12. As shown in FIGS. The traveling frame (truck frame) 11 is a structure to which the traveling mechanism 12 is attached and supports the swivel base 2 on the upper part.
The traveling mechanism 12 is, for example, a crawler type. The traveling mechanism 12 includes an idler 13, a driving wheel 14, a plurality of rolling wheels 15, an endless crawler belt 16, and a traveling system hydraulic equipment M (travel motor ML) driven by hydraulic fluid discharged by a hydraulic pump 92. , MR). The travel motors ML and MR are constituted by hydraulic motors, and drive the drive wheels 14 to circulate the crawler belt 16 in the circumferential direction. As shown in FIG. 3, a dozer device 18 is mounted on the front portion of the lower traveling body 10 and is driven up and down by the expansion and contraction of a dozer cylinder C5 (M), which is a hydraulic cylinder (hydraulic actuator).

As shown in FIGS. 1 and 2, the working device 20 is provided on the front side of the swivel base 2. As shown in FIGS. The work device 20 includes a boom 21, an arm 22, and a bucket (work tool) 23. The base end of the boom 21 is pivotally attached to the swing bracket 24 so as to be rotatable around a horizontal axis (an axis extending in the width direction), so that the boom 21 can swing in the vertical direction (vertical direction). ing. The arm 22 is pivotally attached to the tip of the boom 21 so as to be rotatable about a horizontal axis, and the arm 22 is swingable in the front-rear direction or the up-down direction. The bucket 23 is provided at the tip of the arm 22 so as to be capable of scooping and dumping operations. The swing work machine 1 can be equipped with another work tool (hydraulic attachment) that can be driven by hydraulic oil instead of or in addition to the bucket 23. Examples of other working tools include a hydraulic breaker, a hydraulic crusher, an angle broom, an earth auger, a pallet fork, a sweeper, a mower, and a snow blower.

As shown in FIG. 1, the swing work machine 1 includes a working hydraulic device M that is operated by hydraulic fluid discharged by a hydraulic pump 92, and the working device 20 is operated by the operation of the working hydraulic device M. drive 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, boom cylinder C2, arm cylinder C3, and bucket cylinder C4 are constituted by hydraulic cylinders (hydraulic actuators). As shown in FIG. 1, the swing bracket 24 is swingable by the expansion and contraction of a swing cylinder C1 provided on the right side of the swivel base 2. As shown in FIG. The boom 21 can be rocked by expanding and contracting the boom cylinder C2. The arm 22 can swing by expanding and contracting the arm cylinder C3. The bucket 23 is capable of scooping and dumping operations by expanding and contracting the bucket cylinder C4.

Therefore, the hydraulic equipment M included in the swing work machine 1 is a swing motor, travel motors ML and MR, a swing cylinder C1, a boom cylinder C2, an arm cylinder C3, a bucket cylinder C4, and a dozer cylinder C5.
The swivel base 2 will be explained below. FIG. 4 is a left front perspective view showing the swivel base 2. FIG. FIG. 5 is a right rear perspective view showing the swivel base 2. FIG. As shown in FIGS. 4 and 5, the swivel base 2 includes a swivel board (substrate) 30, a plurality of vertical ribs 31 (a first vertical rib 31a, a second vertical rib 31b, a third vertical rib 31c), and a support base 30. It has a bracket 32, a partition plate 33, a horizontal rib 34, and a support frame 35. The rotating board 30 is formed from a thick steel plate or the like, and is arranged so that the plate surface faces in the vertical direction. The swing base plate 30 is rotatably supported on the lower traveling body 10 via the swing bearing 3 about the swing axis X.

The first vertical rib 31a, the second vertical rib 31b, and the third vertical rib 31c are members that reinforce the rotating board 30, and are provided to extend in the front-rear direction of the rotating board 30. The first vertical rib 31a and the second vertical rib 31b are erected on the rotating base plate 30, and are arranged in parallel and separated from each other in the width direction. The first vertical rib 31a is arranged on the left side of the rotating base plate 30, and the second vertical rib 31b is arranged on the right side of the rotating base plate 30. Further, the third vertical rib 31c is disposed between the first vertical rib 31a and the second vertical rib 31b, and is provided extending from the rear of the rotating board 30 to the partition plate 33.

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 at a position offset to the right from the center of the swing board 30 in the width direction. 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 vertical direction).

As shown in FIGS. 4 and 5, the partition plate 33 is a member that partitions the front lower part of the rear room R. As shown in FIGS. The partition plate 33 has a plate surface facing in the front-rear direction, and is disposed in the center of the rotating board 30 from one side (left side) to the other side (right side) in the width direction.
The horizontal rib 34 is a member that reinforces the rotating board 30, and is arranged at the rear end of the rotating board 30 from one side (left side) to the other side (right side) in the width direction. The horizontal ribs 34 are erected on the rotating board 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.

The support frame 35 is erected at the rear of the swing board 30 and behind the partition plate 33. The rear part of the support frame 35 is located further back than the rear part of the lower traveling body 10. Specifically, the support frame 35 is disposed within the rear room R and supports the exterior cover 80 and peripheral components disposed inside the exterior cover 80. The support frame 35 includes a plurality of leg members (a first leg 35a, a second leg 35b, a third leg 35c, a fourth leg 35d, and a fifth leg 35e) erected on the rotating board 30, a first rod member 35h, and a second rod member 35i.

The first leg 35a is erected on the front left side of the rear room R. The first leg 35a is erected at the front of a first base 40a provided on the rear left side of the first vertical rib 31a. The first base portion 40a extends from the partition plate 33 to the horizontal rib 34. The first leg 35a has a lower end portion extending upward from the first base portion 40a, a middle portion extending rearward and upward, and an upper end portion bent and extending rearward.

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. That is, the lower end of the second leg 35b is located further forward than the lower end of the first leg 35a. The second leg 35b has a lower end portion extending upward from the second base portion 40b, a middle portion extending rearward and upward, and an upper end portion bent and extending rearward.

The third leg 35c is erected on the rear left side of the rear room R. The third leg 35c is erected at 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 arranged on the left side of the rear part of the rear room R, and is arranged on the inner side (on the right side) in the width direction than the third leg 35c. The fourth leg 35d is erected at a third base 40c provided on the left side of the horizontal rib 34. The fourth leg 35d has a lower end portion extending upward from the third base portion 40c, a midway portion extending forward and upward, and an upper end portion bent and extending forward.

The fifth leg 35e is erected at the rear of the rear room R. The fifth leg 35e is arranged at the rear right side of the rear room R. The fifth leg 35e is erected at a fourth base 40d provided on the right side of the horizontal rib 34. The fifth leg 35e has a lower end portion extending upward from the fourth base portion 40d, a midway portion extending forward and upward, and an upper end portion bent and extending forward.
As shown in FIGS. 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. Further, the connecting plate 35f is provided with a pair of support columns 35g extending forward from the front end of the connecting plate 35f. The pair of support columns 35g are spaced apart in the width direction and are arranged to correspond to the upper end of the fourth leg 35d and the upper end of the fifth leg 35e, respectively. The rear part of the fourth leg 35d and the rear part of the fifth leg 35e are located further back than the rear part of the lower traveling body 10.

The first rod member 35h and the second rod member 35i are arranged so that their plate surfaces face in the vertical direction and extend in the width direction. The first rod member 35h is arranged further forward than the second rod member 35i. The first rod member 35h and the second rod member 35i extend over the upper end of the first leg 35a, the upper end of the second leg 35b, the upper end of the left support column 35g, and the upper end of the right support column 35g. placed and fixed to these. The first rod member 35h supports the rear part of the protection mechanism 85. The second rod member 35i supports the exterior cover 80.

The equipment mounted in the rear room R of the swivel base 2 will be described below. FIG. 6 is a plan view showing the lower traveling body 10, the turning base 30, and various devices arranged on the turning base 30. FIG. 7 is a right front perspective view showing the rotating board 30, the battery unit 90, the electric motor 91, the hydraulic pump 92, and the electrical components 93. As shown in FIGS. 6 and 7, the swing work machine 1 includes a battery unit 90, an electric motor 91, a hydraulic pump 92, and electrical components 93. A pump 92 and electrical components 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 a plurality of batteries 90a. The plurality of batteries 90a are connected in parallel to each other. The plurality of batteries 90a are capable of storing electricity, and are, for example, secondary batteries such as lithium ion batteries and lead-acid batteries. The plurality of batteries 90a have a casing made of a flat steel plate and a plurality of cells arranged inside the casing, and the plurality of cells are electrically connected in series and/or in parallel. It is connected.

In this embodiment, the battery unit 90 has two batteries 90a. Note that the number of batteries 90a that the battery unit 90 has may be a plurality, and is not limited to two, and may be an even number other than two, for example, or may be three. The plurality of batteries 90a are arranged adjacent to each other in the width direction, and are connected to each other by connection brackets 90b.

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

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 a 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. Note that the spline provided on the input shaft 92a is sometimes referred to as a male spline.

The electrical equipment 93 is a device or the like that is directly or indirectly connected to the battery unit 90, transmits power supplied by the battery unit 90, or operates using the power. The electrical components 93 are, for example, a junction box 93a, an inverter 93b, and a DC/DC converter 93c. Junction box 93a is connected to other devices including battery unit 90 and inverter 93b, and transmits power supplied from battery unit 90 to other devices.

The inverter 93b is provided in the power supply path from the battery unit 90 to the electric motor 91, and adjusts the electric 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.

The DC/DC converter 93c converts the input DC current voltage into a different voltage. In this embodiment, the DC/DC converter 93c is a step-down converter that converts an input voltage to a lower voltage. The DC/DC converter 93c is provided, for example, in the swing working machine 1, and supplies power to an on-vehicle battery (not shown) that supplies power to electronic equipment.
The arrangement of the battery unit 90, electric motor 91, hydraulic pump 92, and electrical components 93 will be described below. As shown in FIG. 6, the battery unit 90 is arranged at the center in the width direction of the rear part of the swivel base 2. Specifically, the battery unit 90 is arranged from a midway part of the swivel base 2 in the longitudinal direction to the rear part of the swivel base 2. It is placed across. That is, the rear part of the battery unit 90 is located further back than the rear part of the lower traveling body 10. Further, as shown in FIG. 2, the center of gravity of the battery unit 90 is placed on one side (left side) with respect to the center line Y in the width direction of the swivel base 2, and is placed behind the protection mechanism 85. .

As shown in FIG. 6, the outer periphery of the battery unit 90 is surrounded by the support frame 35. Specifically, the lower end of the first leg 35a and the lower end of the second leg 35b are located in front of the battery unit 90. The third leg 35c is located on the left side of the battery unit 90. At the rear of the battery unit 90, the lower end of the fourth leg 35d and the lower end of the fifth leg 35e are located. Above the battery unit 90, the upper end of the first leg 35a, the upper end of the second leg 35b, the upper end of the fourth leg 35d, the upper end of the fifth leg 35e, the pair of support columns 35g, and the first rod member. 35h, and the second rod member 35i are located.

As shown in FIG. 2, the electric motor 91 and the hydraulic pump 92 are located on the other side (right side) with respect to the center line Y in the width direction of the swivel base 2, and as shown in FIGS. They are arranged side by side in the front-rear direction. Specifically, the electric motor 91 and the hydraulic pump 92 are arranged on the lower side (to the right) of the battery unit 90. 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 behind the hydraulic pump 92, and is arranged so that the drive shaft 91a faces in the front-rear direction. The hydraulic pump 92 is arranged so that the input shaft 92a faces the front-rear direction, and the axial center line of the input shaft 92a and the axial center line of the drive shaft 91a coincide.

Hydraulic pump 92 is located in front of electric motor 91. Further, as shown in FIG. 2, a hydraulic oil tank 94 is arranged in front of the hydraulic pump 92, in which hydraulic oil sucked by the hydraulic pump 92 is stored. Further, a control valve 95 for adjusting the flow rate of the hydraulic oil supplied to the hydraulic equipment M is provided at the front of the hydraulic oil tank 94.
As shown in FIGS. 3 and 7, the electrical components 93 are arranged in a line in the width direction above the battery unit 90. In other words, the battery unit 90 is arranged below the electrical component 93, and the swivel base 2, the battery unit 90, and the electrical component 93 are arranged from the bottom to the top. The electrical components 93 are arranged in this order. That is, the battery unit 90, which is relatively heavy, is disposed below the electrical components 93, and its position in the swing work machine 1 is low.

The attachment of the battery unit 90, electric motor 91, hydraulic pump 92, and electrical components 93 will be described in detail below. As shown in FIG. 7, the swing work 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 showing the support body 50. FIG. FIG. 9 is a plan view showing the support body 50. FIG. 10 is a bottom view showing the support body 50.

As shown in FIGS. 8, 9, and 10, the support body 50 is made of a thick steel plate or the like. The support body 50 is arranged on the swivel base 2 so that the plate surface faces in the vertical direction. The support body 50 is fixed to the swivel base 2 via a fastener V such as a bolt. In other words, the support body 50 is attached to the swivel base 2 such that its relative position to the swivel base 2 cannot be moved.
Further, the support body 50 includes a frame member 51 and a plurality of plate members 52. The frame member 51 is a member that connects a 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.

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 elongated frames having a substantially L-shaped cross section and formed by bending a thick steel plate.
The front frame 51a forms the front end of the frame member 51, and is arranged so that its longitudinal direction coincides with its width direction.

The rear frame 51b forms the rear end of the frame member 51, and is arranged so that its longitudinal direction coincides with the width direction. The rear frame 51b is spaced apart from the front frame 51a in the front-rear direction.
The pair of side frames 51c and 51d are spaced apart in the width direction. The pair of side frames 51c and 51d form one end (left end) and the other end (right end) in the width direction of the frame member 51, respectively, and are arranged so that the longitudinal direction coincides with the front-rear direction. . That is, the frame member 51 forms a substantially parallel cross shape in plan view by the front frame 51a, the pair of side frames 51c and 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 only need to connect a plurality of plate members 52, respectively, and even if they are directly connected to each other by welding or the like, They may be indirectly connected via the plate member 52.

Further, the frame member 51 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, respectively. 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 and 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 and the rear part of the rear frame 51b, and extends upward. The pair of mounting brackets 51e are fixed to the lower rear portion of the battery unit 90 using fasteners such as bolts.

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, and the outer circumference of the bottom of the battery unit 90 is placed on the plate member 52 . Further, the mounting surface of the plate member 52 on which the battery unit 90 is mounted (the hatched portion in FIG. 8) is machined to be smooth. In other words, the portion of the support body 50 other than the mounting surface of the plate member 52 is not machined. Note that the plate member 52 is machined while being fixed to the frame member 51. Therefore, distortion (welding distortion) caused on the mounting surface of the plate member 52 due to welding can be removed. Note that in this embodiment, since the battery unit 90 is placed on the top surface of the plate member 52, the placement surface is the top surface of the plate member 52.

Further, the plurality of plate members 52 are fixed to the frame member 51 at a distance from each other. The lower surface and/or side surface of the plate member 52 is fixed to the frame member 51 by welding. In this embodiment, the plurality of plate members 52 are composed of four plate members 52, including a first plate part 52a, a second plate part 52b, a third plate part 52c, and a fourth plate part 52d. Contains. Note that the number of the plurality of plate members 52 is not limited to four, and may be three or five.

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

The lower surface and/or side surface of the first plate portion 52a is fixed to the front frame 51a and the pair of side frames 51c and 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 and 51d by welding on both the lower surface and the side surfaces.
Further, a hole 52a1 penetrating the first plate portion 52a in the vertical direction and a notch portion 52a2 cut out rearward from the front end portion are formed in the front portion of the first plate portion 52a. A plurality of holes 52a1 are formed from one side (left side) to the other side (right side) in the width direction of the first plate portion 52a. A plurality of cutout portions 52a2 are formed from one side (left side) to the other side (right side) in the width direction of the first plate portion 52a. Moreover, the notch portion 52a2 is formed between the holes 52a1. Therefore, the first plate portion 52a is formed into a substantially comb shape in plan view.

A rear end portion of the battery unit 90 is placed on the second plate portion 52b. In this embodiment, the rear end portions of the plurality of 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 and width direction coincide. The second plate portion 52b is connected to the third plate portion 52c and the fourth plate portion 52d via the rear frame 51b.

The lower surface and/or side surface of the second plate portion 52b is fixed to the rear frame 51b and the pair of side frames 51c and 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 and 51d by welding on both the lower surface and the side surfaces.
One end (left end) of the battery unit 90 in the width direction is placed on the third plate portion 52c. On the third plate portion 52c, the left end portion of the battery 90a at one end (left end) in the width direction among the plurality of batteries 90a is placed. The third plate portion 52c is disposed at the left end portion of the support body 50, and is disposed so that the longitudinal direction and the front-back direction coincide with each other. 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 and 51d.

The lower 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 lower surface and the side surface.
Further, the third plate portion 52c has a first attached portion 52c1 that is fixed to the swivel base 2 via a fastener V such as a bolt. The first attached portion 52c1 is a portion extending outward (to the left) in the width direction, and has a hole 52c2 penetrating in the vertical direction. A fastener V is inserted through the hole 52c2, and the fastener V is fastened to the first base portion 40a. In this embodiment, the first attached portion 52c1 is formed in a portion near the front end and a portion near the rear end of the third plate portion 52c.

The other end (right end) of the battery unit 90 in the width direction is placed on the fourth plate portion 52d. The right end portion of the battery 90a at the other end (right end) in the width direction among the plurality of batteries 90a is placed on the fourth plate portion 52d. The fourth plate portion 52d is disposed at the right end portion of the support body 50, and is disposed so that the longitudinal direction and the front-back direction coincide with each other. 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 and 51d.

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 and 51d by welding. In this embodiment, the fourth plate portion 52d is fixed to the front frame 51a and the right side frames 51c and 51d by welding on both the lower surface and the side surface.
Further, the fourth plate portion 52d has a second attached portion 52d1 that is fixed to the swivel base 2 via a fastener V such as a bolt. The second attached portion 52d1 is a portion extending outward (to the right) in the width direction, and has a hole 52d2 penetrating in the vertical direction. A fastener V is inserted into the hole 52d2, and the fastener V is attached to a fifth base 40e provided on the rear right side of the second vertical rib 31b and a sixth base 40f attached to the right end of the horizontal rib 34. It is concluded. In this embodiment, the second attached portion 52d1 is formed at the front end and the rear end of the fourth plate portion 52d. In other words, the second attached part 52d1 on the front side is formed more forward than the first attached part 52c1 on the front side, and the second attached part 52d1 on the rear side is formed more rearward than the first attached part 52c1 on the rear side. is formed.

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 an elongated frame that connects the widthwise central portion of the first plate portion 52a and the widthwise central portion of the second plate portion 52b. The first connecting plate 53 is formed from a thick steel plate that is thinner than the plurality of plate members 52, and the rear end portion of the first connecting plate 53 is connected to the lower surface of the widthwise center portion of the second plate portion 52b. has been done. The rear end portion of the first connecting plate 53 extends forward from the second plate portion 52b, bends upward, and bends forward. It has reached the plate portion 52a. 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 part 52a by welding. Further, on the first connecting plate 53, two adjacent batteries 90a among the plurality of batteries 90a are placed.

As shown in FIGS. 8, 9, and 10, a ventilation hole 53a is formed in the first connection plate 53, and the ventilation hole 53a is formed between the two batteries 90a. The ventilation hole 53a is a hole penetrated in the vertical direction. The width W1 of the ventilation hole 53a is larger than the length W2 between the batteries 90a. Note that the ventilation holes 53a only need to overlap at least between the batteries 90a, and their shape, size, and number are not limited to the example shown in FIG. 9 and the like. For example, the ventilation hole 53a may be formed in a circular shape, a slit shape, a fin shape, or the like.

As shown in FIG. 8, FIG. 9, and FIG. ) and extends from the other end (right end). The left end portion of the second connecting plate 54 is connected to the central portion of the third plate portion 52c in the front-rear direction, and the right end portion of the second connecting plate 54 is connected to the central portion of the fourth plate portion 52d in the front-rear direction. There is. Therefore, the first connecting plate 53 and the second connecting plate 54 are perpendicular to each other.

Note that the first connecting plate 53 and the second connecting plate 54 are not machined, and the plate member 52 is attached to the frame member 51 before the first connecting plate 53 and the second connecting plate 54 are attached. Machined in a fixed position.
Further, as shown in FIG. 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 the 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.

FIG. 11 is a diagram illustrating movement of the fixture 55. As shown in FIG. 11, the fixture 55 is attached to the first plate part 52a with fasteners such as bolts and nuts, and the fasteners are fastened to holes 52a1 formed in the front part of the first plate part 52a. be done. Specifically, the fixing tool 55 is a member having a substantially L-shaped cross section and having a first fixing part 55a and a second fixing part 55b extending upward from the first fixing part 55a. The first fixing portion 55a is formed with a through hole 55a1 that extends vertically and is elongated in the front-rear direction. Therefore, as shown in FIG. 11, by changing the position where the fastener is inserted into the through hole 55a1, the attachment position of the fixture 55 can be adjusted in the front-rear direction. The second fixing portion 55b is formed with a through hole 55b1 that extends 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 portion of the battery unit 90 using a fastener such as a bolt. Note that when the pair of attachment brackets 51e are provided at the front end of the frame member 51, the fixture 55 is attached to the second plate portion 52b.

The attachment of the electrical component 93 will be described in detail below. As shown in FIG. 7, the upright frame 56 includes a first upright portion 56L, a second upright portion 56R, and a connecting stay 56U. FIG. 12 is a left rear perspective view showing the support body 50, the first erected portion 56L, the second erected portion 56R, and the like.
As shown in FIG. 12, the first upright portion 56L is erected above the third plate portion 52c, and supports one side of the battery unit 90, as shown in FIG. The first upright portion 56L is a plate-shaped 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.

On the other hand, as shown in FIG. 12, the second upright portion 56R is provided upright above the fourth plate portion 52d, and as shown in FIG. 7, supports the other side (right side) of the battery unit 90. . 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. That is, the battery unit 90 is held between the first upright portion 56L and the second upright portion 56R in the width direction.

As shown in FIG. 12, the first erected portion 56L and the second erected portion 56R each include a lower erected portion (sway prevention portion) 57 and an upper erected portion 58. The lower portion 57 is attached to the battery unit 90 in the front-rear direction. The lower portions 57 are provided on the left and right sides of the support body 50, respectively. The lower upright portion 57 of the second upright portion 56R is erected between the support portion 65 and the battery unit 90, and is attached to the other side (right side) of the battery unit 90.

Further, the lower upright portion 57 of the first upright portion 56L is provided upright above the support body 50 (swivel base 2) on one side (left side) of the battery unit 90, and below the second upright portion 56R. It is attached to one side (left side) of the battery unit 90 separately from the upright portion 57 . In this embodiment, the lower portion 57 and the battery unit 90 are attached and fixed using fasteners such as bolts. In addition, a plurality of opening holes 57a are formed in the lower part 57, spaced apart in the front-rear direction.

As shown in FIG. 12, the upper upright part 58 is a part attached to the upper part of the lower upright part 57. The length of the upper upright portion 58 in the front and back direction decreases as it moves from the bottom to the top.In other words, the rear end of the upper upright portion 58 has an inclined portion 58a that moves from the bottom back to the top front. is forming. The front end of the upper upright portion 58 forms an inclined portion 58b that transitions from the lower front to the upper rear.

Note that a plurality of opening holes 58c are formed in the upright portion 58 and spaced apart from each other in the front-rear direction. Further, the upper upright portion 58 and the battery unit 90 are separated from each other, and a space is formed between the upper upright portion 58 and the battery unit 90.
Furthermore, attachment portions 59 are formed at the front and rear ends of the upper upright portion 58, respectively, to which eyebolts 59A can be attached and detached. Thereby, when the unit in which the battery unit 90 is placed on the support body 50 and the electrical component 93 is attached to the connection stay 56U is mounted on the swivel base 2, the entire assembly can be lifted.

As shown in FIG. 7, the connection stay 56U is a stay that connects the upper part of the first upright part 56L and the upper part of the second upright part 56R, and supports the electrical component 93. That is, the connection stay 56U serves both to reinforce the first upright portion 56L and the second upright portion 56R, and to support the electrical component 93. Specifically, the connecting stay 56U is made of, for example, a thick steel plate, and is arranged so that the plate surface faces in the up-down direction. The length of the connecting stay 56U in the width direction is longer than the length in the front-rear direction, and the length in the front-rear direction is shorter than the length of the battery unit 90 in the front-rear direction.

As shown in FIG. 7, electrical components 93 are placed on the top of the connecting stay 56U in a row in the width direction. The electrical components 93 are arranged in the order of an inverter 93b, a junction box 93a, and a DC/DC converter 93c from one side (left side) in the width direction in the upper part of the connecting stay 56U.
FIG. 13 is an exploded perspective view of the connecting stay 56U and the electrical component 93 viewed from the left front. As shown in FIG. 13, the electrical component 93 and the connecting stay 56U are attached and fixed using fasteners V such as bolts. The electrical component 93 may be attached and fixed to the connecting stay 56U via attachment stays 56U1 and 56U2. In this embodiment, a junction box 93a and a DC/DC converter 93c are fixedly attached to a connecting stay 56U via attachment stays 56U1 and 56U2. The mounting stays 56U1 and 56U2 are formed with holes for mounting and fixing the electrical components 93 and the connecting stay 56U with fasteners V such as bolts. Among the holes formed in the mounting stay 56U2 to which at least the junction box 93a is attached, the hole to which the connecting stay 56U and the fastener V are attached and fixed is formed as a long hole elongated in the width direction. Thereby, it is possible to suppress the load on the harness connected to the electrical component 93 due to variations in the dimensional tolerances of the electrical component 93 and the connection stay 56U.

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

FIG. 15 is an exploded perspective view of the electric motor 91, the connector 60, and the first bracket 61 viewed from the left front. 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 as to rotate together around the same axis.
As shown in FIG. 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 connecting tool 60 includes, for example, a first connecting part (boss part) 60a connected to the drive shaft 91a, a second connecting part (flange part) 60b connected to the input shaft 92a, and a first connecting part 60a and a second connecting part 60a. It has an elastic body 60c that connects the connecting portion 60b. The first connecting portion 60a has a cylindrical shape, and a drive shaft 91a can be inserted into the first connecting portion 60a.

Further, the first connecting portion 60a can fix the inserted drive shaft 91a with a spring pin, a hollow set, or the like attached to the outer periphery of the first connecting portion 60a. A female spline that engages with a male spline of the input shaft 92a is formed in the second connecting portion 60b. Further, the elastic body 60c is made of an elastic member such as rubber, and is connected to the first connecting portion 60a and the second connecting portion 60b by a fastening member such as a bolt.

As shown in FIG. 14, the first bracket (bracket) 61 is separate from the electric motor 91 and connects the electric motor 91 and the support section 65. The first bracket 61 is attached to the support portion 65 in a state where it has been attached to the electric motor 91 together with the connecting tool 60 in advance.
As shown in FIG. 15, the first bracket 61 is a plate-shaped 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 from the 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 the housing 91b of the electric motor 91 is inserted into the first mounting hole 61a. It will be installed. The first spigot internal fitting portion 91b2 is formed to protrude toward the distal end side of the drive shaft 91a from a first flange portion 91b1 formed on the drive shaft 91a side of the housing 91b of the electric motor 91. The inner diameter of the first mounting hole 61a is smaller than the outer diameter of the connector 60, and the first bracket 61 is attached to the electric motor 91 before connecting the connector 60 to the drive shaft 91a.

The first bracket 61 has a first connecting portion 61A that is connected to the electric motor 91, and a first extending portion (extending portion) 61B that is 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 into which a fastener V1 such as a bolt is inserted.
The first extending portion 61B extends radially outward of the drive shaft 91a from the first connecting portion 61A. That is, the first extending portion 61B extends radially outward of the drive shaft 91a rather 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 in the axial direction of the drive shaft 91a and into 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. Ru. In this embodiment, four first connected portions 61B1 are formed in the first extending portion 61B, and are formed at each vertex of the first extending portion 61B.

Therefore, the first bracket 61 engages the first spigot inner fitting part 91b2 and the first mounting hole 61a to align the axis of the drive shaft 91a and the center of the first mounting hole 61a. Then, it is attached to the electric motor 91.
As shown in FIG. 14, the second bracket (bracket) 62 is separate from the hydraulic pump 92 and connects the hydraulic pump 92 and the support section 65. The second bracket 62 is attached to the support portion 65 in a state where it has been attached to the hydraulic pump 92 together with the connector 60 in advance.

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-shaped 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 from the 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 part (spigot internal fitting part) 92b2 formed around the input shaft 92a in the housing 92b of the hydraulic pump 92 is inserted into the second mounting hole 62a. It will be installed. The second spigot internal fitting portion 92b2 is formed to protrude toward the distal end side of the input shaft 92a from a second flange portion 92b1 formed on the input shaft 92a side of the housing 92b of the hydraulic pump 92. The second bracket 62 is attached to the hydraulic pump 92 before being attached to the support part 65.

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

The second extending portion 62B extends radially outward of the input shaft 92a from the second connecting portion 62A. In other words, the second extending portion 62B extends further radially outward of the input shaft 92a than the hydraulic pump 92. The second extending portion 62B has a second connected portion (connected portion) 62B1 that is connected to the support portion 65. The second connected portion 62B1 is a hole that passes through the input shaft 92a in the axial direction and into 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. Ru. In this embodiment, three second connected parts 62B1 are formed in the second extended part 62B, two second connected parts 62B1 are formed on the upper part of the second extended part 62B, and the second connected parts 62B1 are formed in the second extended part 62B. One second connected portion 62B1 is formed at the lower part of the extending portion 62B. The second connected portion 62B1 at the bottom of the second extending portion 62B is offset in the width direction with respect to the input shaft 92a. Thereby, the operator can easily access the tool when attaching the fastener V4 to the second connected part 62B1 at the lower part of the second extending part 62B.

Therefore, the second bracket 62 engages the second spigot inner fitting portion 92b2 and the second mounting hole 62a to align the axis of the input shaft 92a and the center of the second mounting hole 62a. Then, it is attached to the hydraulic pump 92.
As shown in FIG. 7, the support portion 65 is a pedestal that supports the electric motor 91 and the hydraulic pump 92 on the swivel base 2 on 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 . Further, as shown in FIG. 14, the support section 65 has an electric motor 91 attached to the support section 65 via the first bracket 61, and a hydraulic pump 92 attached to the support section 65 via the second bracket 62. In this state, it also serves as a housing that surrounds the radially outer side of the connecting tool 60. 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 side by side in the front-rear direction.

FIG. 17 is a right rear perspective view showing the support portion 65. FIG. FIG. 18 is an exploded perspective view showing how the first bracket 61 and the like are attached to the support section 65. FIG. 19 is an exploded perspective view showing how the second bracket 62 and the like are attached to the support portion 65. As shown in FIGS. 17, 18, and 19, the support portion 65 includes a first standing plate 66, a second standing plate 67, a curved portion 68, and a pedestal portion 69. The first upright plate 66 is a plate-shaped member made of a thick steel plate or the like. The first standing plate 66 is erected so that the plate surface faces in the axial direction (front-back direction) of the drive shaft 91a and the input shaft 92a.

In this embodiment, the first standing plate 66 is formed in a substantially square shape when viewed from the front or from the rear, 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. That is, the inner diameter of the first opening 66a is larger than the outer diameter of the connector 60. Further, a hole 66b is formed in the edge of the first standing plate 66, into which a fastener V2 such as a bolt inserted into the first connected portion 61B1 is fastened.

Note that a notch 66c and a hole 66d are formed in the edge of the first standing plate 66 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-shaped member made of a thick steel plate or the like. The second upright plate 67 is erected so that the plate surface faces in the axial direction (front-back direction) of the drive shaft 91a and the input shaft 92a. Further, the second erected plate 67 is spaced apart from each other in the axial direction (front-rear direction) of the drive shaft 91a and the input shaft 92a, and is arranged to face the first erected plate 66. The second upright plate 67 has an upper portion formed in a half-moon shape and a lower portion formed in a substantially rectangular shape, and corresponds to the second bracket 62 when viewed from the front or from the rear. A second opening 67a corresponding to the first opening 66a is formed in the center of the second standing plate 67. Further, a hole 67b is formed in the edge of the second standing plate 67, into which a fastener V4 such as a bolt inserted into the second connected portion 62B1 is fastened.

The curved portion 68 is a member that is arranged between the first erected plate 66 and the second erected plate 67 and connects the first erected plate 66 and the second erected plate 67. The curved portion 68 is a plate-shaped member made of a thick steel plate or the like, and has an upwardly convex inverted U shape when viewed from the front or from the rear. One end (left end) of the curved portion 68 extends upward from the upper surface of the pedestal 69, a midway portion of the curved portion 68 curves across the outer periphery of the connector 60, and the other end (the right end) of the curved portion 68 extends upward from the upper surface of the pedestal 69. section) reaches the upper surface of the pedestal section 69.

The pedestal portion 69 is a plate-shaped member made of a thick steel plate or the like, and is arranged so that the plate surface faces in the vertical direction. The pedestal portion 69 supports the first standing plate 66 , the second standing plate 67 , and the curved portion 68 on the swivel base 2 . The pedestal portion 69 includes a central portion 69a provided with a first standing plate 66, a second standing plate 67, and a curved portion 68, and a pair of extending portions 69b and 69c extending from the central portion 69a. have. The center portion 69a has a generally rectangular shape that is elongated in the width direction, and the ends in the width direction extend further outward in the width direction than the electric motor 91 and the hydraulic pump 92, respectively.

The pair of extension parts 69b and 69c include a first extension part 69b extending rearward from the rear end of the central part 69a, and a second extension part 69c extending forward from the front end of the central part 69a. , contains. The first extending portion 69b is a member forming the rear end side of the pedestal portion 69, and is formed into a substantially trapezoidal shape in plan view. The widthwise end portions of the first extending portions 69b extend further outward than the electric motor 91 and the hydraulic pump 92, respectively.

Specifically, an inclined portion 69b1 that transitions from the front side to the rear side from the other side (right side) to the one side (left side) in the width direction is formed at the rear end of the first extending portion 69b. Therefore, the inclined portion 69b1 is formed in a shape that follows the outer shape of the right rear portion of the exterior cover 80. Further, an opening 69b2 that penetrates in the vertical direction is formed in the first extending portion 69b.
The second extending portion 69c is a member constituting the front end side of the pedestal portion 69, and the widthwise end portions of the second extending portion 69c are outside the electric motor 91 and the hydraulic pump 92 in the width direction. It is extended in the direction. A notch 69c1 is formed at the front end of the second extending portion 69c. The cutout 69c1 is a portion that avoids interference with protrusions such as ports provided on the hydraulic pump 92.

As shown in FIGS. 7 and 14, the support portion 65 is attached to the swivel base 2 via a plurality of mounting devices 70. The plurality of mounting devices 70 are located laterally outward than the electric motor 91, the hydraulic pump 92, and the support portion 65 in plan view, with the electric motor 91 and the hydraulic pump 92 attached to the support portion 65. There is.
The plurality of mount devices 70 are vibration isolation mechanisms made of elastic members that can be elastically deformed. As shown in FIG. 14, four mounting devices 70 are provided. As shown in FIG. 7, the plurality of mounting devices 70 are attached to fixed brackets 41 and 42 attached to the swivel base 2. As shown in FIG. Note that the number of the plurality of mounting devices 70 is not limited to four, and may be three or five. In this embodiment, the plurality of mounting devices 70 include a pair of rear mounting devices 70a and a pair of front mounting devices 70b.

As shown in FIG. 14, the pair of rear mounting devices 70a are arranged in the width direction at the rear end portion of the first extending portion 69b. The pair of rear mount devices 70a support one side (left side) and the other side (right side) in the width direction of the rear end portion of the first extending portion 69b. Therefore, the pair of rear mounting devices 70a are located further outward in the width direction than the electric motor 91, the hydraulic pump 92, and the support portion 65 in plan view. Specifically, the center of the nut N that fastens the pair of rear mounting devices 70a and the first extension portion 69b is located further outward in the width direction than the electric motor 91, the hydraulic pump 92, and the support portion 65. Further, the pair of rear mount devices 70a are arranged offset in the front-rear direction.

A pair of front mount devices 70b are arranged in the width direction at the front end portion of the second extending portion 69c. The pair of front mount devices 70b supports one side (left side) and the other side (right side) in the width direction of the front end portion of the second extending portion 69c. Therefore, the pair of front mount devices 70b are located further outward in the width direction than the electric motor 91, the hydraulic pump 92, and the support portion 65 in plan view. Specifically, the center of the nut N that fastens the pair of front mount devices 70b and the second extension portion 69c is located further outward in the width direction than the electric motor 91, the hydraulic pump 92, and the support portion 65. Further, the pair of front mount devices 70b are arranged so that their positions in the front and back direction coincide.

Further, as shown in FIGS. 18 and 19, the support portion 65 is provided with knock pins 66e and 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 facing 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.

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 at the edge of the first standing plate 66, and are arranged so that a straight line L1 connecting their axes passes through the axis of the drive shaft 91a. has been done. In the present embodiment, one of the first knock pins 66e is provided at the lower part of one side (left side) in the width direction of the first extending portion 61B, and the other first knock pin 66e is provided at the lower part of the first extending portion 61B. It is provided at the upper part of the other side (right side) in the width direction of 61B.

As shown in FIG. 18, the first bracket 61 is formed with a hole (first insertion hole) 61B2 into which the first knock pin 66e is inserted. The first fitting hole 61B2 is a hole that penetrates in the axial direction of the drive shaft 91a, and is formed at a position corresponding to the pair of first knock pins 66e.
As shown in FIG. 19, the second upright plate 67 is provided with a knock pin (second knock pin) 67c facing in the axial direction of the input shaft 92a. A plurality of second knock pins 67c are provided on the second erected plate 67, and in this embodiment, two second knock pins 67c are provided on the second erected plate 67.

FIG. 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 at the edge of the second standing plate 67, and a straight line L2 connecting their axes is offset with respect to the axis of the input shaft 92a. It is arranged like this. In the present embodiment, one of the second knock pins 67c is provided at a portion of the upper part of the second extending portion 62B closer to the other side (right side) in the width direction, and the other second knock pin 67c is provided on the second extending portion 62B. It is provided at a lower portion of the extension portion 62B closer to the other side (right side) in the width direction. That is, the pair of second knock pins 67c are provided on the right side of the perpendicular Z passing through the axis of the input shaft 92a.

As shown in FIG. 19, the second bracket 62 is formed with a hole (second insertion hole) 62B2 into which the second knock pin 67c is inserted. The second fitting hole 62B2 is a hole that penetrates in the axial direction of the input shaft 92a, and is formed at a position corresponding to the pair of second knock pins 67c.
Moreover, at least two or more of the electric motor 91, the first bracket 61, the support part 65, the second bracket 62, and the hydraulic pump 92 are provided with mounting parts 71 to which the hanging tools 75 are attached. In this embodiment, the attachment portion 71 is formed on the electric motor 91, the support portion 65, and the second bracket 62. As a result, by attaching the hanging tool 75 to the mounting part 71, a connecting 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 can be created. Can be hung. In this embodiment, the hanging tool 75 is an eye bolt, and is detachably attached to the attachment part 71. Note that the fastening holes formed in the attachment portion 71 and to which the hanging tool 75 is fastened are common, and the hanging tool 75 can be used in common.

A pair of attachment portions 71 are formed on the electric motor 91 . The pair of attachment portions 71 are formed in the housing 91b of the electric motor 91 at an upper portion of one end (left end) and an upper portion of the other end (right end) in the axial direction of the drive shaft 91a.
The support portion 65 is formed with a mounting portion 71 (second mounting portion 71B) to which a hanging tool 75 (second hanging tool 75B) is attached. The second attachment part 71B is formed to connect the upper part of the first standing plate 66 and the upper part of the curved part 68.

The second bracket 62 is formed with a mounting portion 71 (first mounting portion 71A) to which a hanging tool 75 (first hanging tool 75A) is attached. The first mounting portion 71A is formed on the upper part of the second bracket 62.
In addition, in the embodiment mentioned above, the case where the attachment part 71 is formed in the electric motor 91, the support part 65, and the second bracket 62 was explained as an example, but the attachment part 71 is formed in the electric motor 91, the first bracket 61, and the support part. 65, the second bracket 62, and the hydraulic pump 92, the attachment part 71 to which the hanging tool 75 is attached may be formed. You can leave it there.

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

The operator 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 the connector 60 to the electric motor 91 described above may be referred to as the "first step" of the process of attaching the electric motor 91 to the support portion 65. Further, the structure including the electric motor 91, the first bracket 61, and the connector 60 attached in the first step may be referred to as a "first assembly".

The operator attaches the hanging tool 75 to the pair of attachment parts 71 of the electric motor 91. The worker attaches the hook of a crane provided at a workshop such as a factory to the lifting tool 75 and lifts the first assembly.
As shown in FIG. 18, the operator inserts the connector 60 into the first opening 66a and aligns the first knock pin 66e and the first fitting hole 61B2. At this time, the pair of first knock pins 66e are arranged so that the straight line L1 connecting their axes passes through the axis of the drive shaft 91a, so the operator can swing the first assembly around the drive shaft 91a. By moving, the first knock pin 66e and the first fitting hole 61B2 can be easily aligned. After fitting the first knock pin 66e into the first fitting hole 61B2, the operator inserts the fastener V2 into the first connected portion 61B1 and attaches the first bracket 61 to the support portion 65. Note that in the following description, the process of attaching the first assembly described above to the support section 65 may be referred to as a "second step" of the process of attaching the electric motor 91 to the support section 65.

Next, the assembly of the hydraulic pump 92, the connector 60, the second bracket 62, and the support section 65 will be explained. As shown in FIG. 16, the operator aligns the second mounting hole 62a and the second spigot internal fitting part 92b2, and attaches the second spigot internal fitting part 92b2 to the second mounting hole 62a. As shown in FIG. 16, the operator fastens the fastener V3 to the hole 62A1 through the hole of the second collar portion 92b1, and attaches the second bracket 62 to the hydraulic pump 92.

In the following description, the process of attaching the second bracket 62 to the hydraulic pump 92 described above may be referred to as the "first step" of the process of attaching the hydraulic pump 92 to the support portion 65. Further, the structure including the hydraulic pump 92 and the second bracket 62 attached in the first step may be referred to as a "second assembly".
The operator inserts the input shaft 92a into the second connecting portion 60b while aligning the second knock pin 67c and the second fitting hole 62B2. At this time, since the pair of second knock pins 67c are arranged so that the straight line L2 connecting their axes is offset from the axis of the input shaft 92a, the operator can ), the position of the input shaft 92a and the second connection part 60b can be easily aligned and the second The knock pin 67c and the second fitting hole 62B2 can be aligned.

Note that when attaching the second assembly to the support section 65, the operator may attach the first hanging tool 75A to the first attachment section 71A. The operator can attach the hook of the crane to the first lifting tool 75A and lift the second assembly.
As shown in FIG. 19, the operator inserts the fastener V4 into the second connected portion 62B1 and attaches the second bracket 62 to the support portion 65. Note that in the following description, the process of attaching the second assembly described above to the support part 65 may be referred to as a "second step" of the process of attaching the hydraulic pump 92 to the support part 65. Further, a structure including the electric motor 91, the hydraulic pump 92, the connector 60, the first bracket 61, the second bracket 62, and the support section 65 may be referred to as a "third assembly".

Then, the operator attaches the first hanging tool 75A to the first mounting section 71A, and attaches the second hanging tool 75B to the second mounting section 71B. The operator can attach the hooks of the crane to the first lifting tool 75A and the second lifting tool 75B and lift the third assembly. FIG. 22 is a right rear perspective view showing the attachment of the third assembly. The operator uses a crane to move the third assembly to the fixing brackets 41 and 42 on the swivel base 2, and as shown in FIG. 22, aligns the plurality of mounting devices 70 and the support section 65. The operator fastens the pair of rear mounting devices 70a and the first extending portion 69b using nuts N, and fastens the pair of front mounting devices 70b and the second extending portion 69c.

In the embodiment described above, the support part 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 part 65. has been described as an example, but instead of the knock pins 66e and 67c, another member may be used to align the first bracket 61 and the second bracket 62 with respect to the support portion 65.

FIG. 23 is an exploded perspective view of the electric motor 91, the connector 60, and the first bracket 61 in a modified example, viewed from the left front. FIG. 24 is an exploded perspective view of the hydraulic pump 92 and the second bracket 62 in a modified example, viewed from the right rear. FIG. 25 is a right rear perspective view showing how the first assembly and second assembly are attached to the support portion 65 in a modified example.
As shown in FIG. 23, the first bracket 61 in the modified example has a third spigot internal fitting part (spigot internal fitting part) 61C. The third spigot internal fitting part 61C is formed on the opposite side (front) of the electric motor 91 from the first connecting part 61A, and protrudes toward the distal end side of the drive shaft 91a. The third spigot internal fitting part 61C is an annular rib, and the outer diameter of the third spigot internal fitting part 61C substantially matches the inner diameter of the first opening 66a, as shown in FIG. The third spigot inner fitting part 61C is attached to the first opening 66a. Further, the inner diameter of the third spigot inner fitting portion 61C is larger than the outer diameter of the connecting tool 60. For this reason, the third spigot inner fitting portion 61C may be able to accommodate a portion of the connector 60 therein. In such a case, the third spigot internal fitting portion 61C can cover the space between the connector 60 and the drive shaft 91a, thereby improving the dustproof property between the connector 60 and the drive shaft 91a.

Moreover, in the first bracket 61 in the modified example, unlike the first bracket 61 shown in FIG. The first connected portion 61B1 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. The portion 61B1 is formed offset outward in the width direction with respect to the hole 61A1. In the example shown in FIGS. 23 and 25, among the first connected portions 61B1 formed in the first extension portion 61B, the first connected portion 61B1 on the lower side and the outer side in the width direction (right side) has a hole. It is formed to be offset outward (to the right) in the width direction with respect to 61A1.

Therefore, since the first connected part 61B1 is located outward in the width direction with respect to the electric motor 91 etc., the operator can easily use the tool when attaching the fastener V2 to the first connected part 61B1. can be accessed.
As shown in FIG. 24, the second bracket 62 in the modified example has a fourth spigot internal fitting part (spigot internal fitting part) 62C. The fourth spigot internal fitting part 62C is formed on the opposite side (backward) of the hydraulic pump 92 from the second connecting part 62A, and protrudes toward the tip side of the input shaft 92a. The fourth spigot inner fitting portion 62C has a cylindrical shape. The outer diameter of the fourth spigot inner fitting part 62C substantially matches the inner diameter of the second opening 67a, and as shown in FIG. 25, the fourth spigot inner fitting part 62C is attached to the second opening 67a. Ru.

The above-described swing work machine 1 includes a swing base 2, a battery unit 90, an electric motor 91 that rotates a drive shaft 91a using the electric power output from the battery unit 90, and an input shaft 92a to which power is input from the drive shaft 91a. a hydraulic pump 92 that discharges hydraulic oil by being driven by 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, and an electric motor 91. and a support part 65 that supports 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 and the support part 65. A structure (first assembly) in which a connector 60 and a first bracket 61 are attached to an electric motor 91 is attached to the support section 65 via the first bracket 61.

According to the above configuration, the electric motor 91 can be easily attached to the support part 65 regardless of the shape of the electric motor 91 and the shape of the support part 65. Furthermore, by attaching the connector 60 to the electric motor 91 in advance, alignment with the drive shaft 91a can be easily performed. Therefore, the power output from the drive shaft 91a to the input shaft 92a can be appropriately transmitted without loss. Thereby, the driving time of the electric motor 91 can be extended by reducing loss.

Further, the electric motor 91 has a spigot internal fitting part (first spigot internal fitting part) 91b2 formed around the drive shaft 91a, and the first bracket 61 has a mounting hole (in which the first spigot internal fitting part 91b2 is mounted). A first mounting hole) 61a is formed.
According to the above configuration, displacement of the drive shaft 91a with respect to the first bracket 61 can be suppressed, and the drive shaft 91a, the connector 60, and the input shaft 92a can be connected with high accuracy. Thereby, the power output from the drive shaft 91a to the input shaft 92a can be appropriately transmitted without loss.

Further, the outer diameter of the connecting tool 60 is larger than the inner diameter of the first mounting hole 61a.
According to the above configuration, it is possible to employ a relatively large connecting tool 60 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 appropriately transmitted without loss. can do. Furthermore, when the first bracket 61 and the connecting tool 60 are attached to the electric motor 91 in advance and then attached to the support section 65, the connecting tool 60 is attached after the electric motor 91 is attached to the supporting section 65. Compared to this, positioning with the drive shaft 91a can be easily performed.

Further, in a state where 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 radially outer side of the connecting tool 60.
According to the above configuration, the support portion 65 can support the electric motor 91 and cover the connector 60. Therefore, it is possible to prevent the connecting tool 60 rotated by the drive shaft 91a from coming into contact with the outside. Furthermore, when the first bracket 61 and the connecting tool 60 are attached to the electric motor 91 in advance and then attached to the support section 65, the connecting tool 60 is attached after the electric motor 91 is attached to the supporting section 65. Compared to this, positioning with the drive shaft 91a can be easily performed.

Further, the first bracket 61 has an extended portion (first extended portion) 61B extending radially outward of the drive shaft 91a than the electric motor 91, and the first extended portion 61B is It has a connected part (first connected part) 61B1 that is connected to the support part 65.
According to the above configuration, a region for connecting the first bracket 61 and the support portion 65 can be secured regardless of the shape of the electric motor 91 and the shape of the support portion 65. Thereby, the electric motor 91 can be easily attached to the support portion 65.

Further, the first connected portion 61B1 is a hole through which a 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 section 65. In addition, by extending the first extending portion 61B further radially outward of the drive shaft 91a than the electric motor 91, a sufficient area can be secured for operating the tool for attaching the fastener V2.

Further, 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 provided with a hole (first knock pin) into which the first knock pin 66e is inserted. A fitting hole) 61a is formed.
According to the above configuration, displacement of the drive shaft 91a with respect to the support portion 65 can be suppressed, and the drive shaft 91a, the connector 60, and the input shaft 92a can be connected with high accuracy. Thereby, the power output from the drive shaft 91a to the input shaft 92a can be appropriately transmitted without loss.

Further, the first bracket 61 is formed with a mounting portion 71 to which a hanging tool 75 is attached.
According to the above configuration, when the first bracket 61 and the connecting tool 60 are attached to the electric motor 91 and are attached to the support section 65, the first bracket 61 and the connecting tool 60 can be lifted up by the hanging tool 75. Therefore, the first bracket 61, the connector 60, and the electric motor 91 can be easily attached to the support portion 65.

Further, a structure (second assembly) is provided in which a connector 60 and a first bracket 61 are attached to an electric motor 91, and a hydraulic pump 92 is attached to a bracket (second bracket) 62 that is different from the first bracket 61. It is attached to the support portion 65 via the second bracket 62 .
According to the above configuration, the hydraulic pump 92 can be easily attached to the support part 65 regardless of the shape of the hydraulic pump 92 and the shape of the support part 65.

Further, the method for assembling the swing work machine 1 includes an electric motor 91 that rotates a drive shaft 91a, an input shaft 92a to which power is input from the drive shaft 91a, and an input shaft 92a from which power is input from the drive shaft 91a to the input shaft 92a. The connector 60 that is driven by power and connects the hydraulic pump 92, the drive shaft 91a and the input shaft 92a, the support part 65 that supports the electric motor 91 and the hydraulic pump 92, and the electric motor 91 are separate bodies. and a first bracket 61 that connects an electric motor 91 and a support part 65. step, and a second step of attaching the first bracket 61, connector 60, and electric motor 91 attached in the first step to the support portion 65.

According to the above configuration, the electric motor 91 can be easily attached to the support part 65 regardless of the shape of the electric motor 91 and the shape of the support part 65. Furthermore, by attaching the connector 60 to the electric motor 91 in advance, alignment with the drive shaft 91a can be easily performed.
The above-described swing work machine 1 includes a swing base 2, a battery unit 90, an electric motor 91 that rotates a drive shaft 91a using the electric power output from the battery unit 90, and an input shaft 92a to which power is input from the drive shaft 91a. a hydraulic pump 92 which discharges hydraulic oil by being driven by the power input from the drive shaft 91a to the input shaft 92a, and a support portion 65 which supports the electric motor 91 and the hydraulic pump 92 on the swivel base 2. , a structure including a bracket (second bracket) 62 that is separate from the hydraulic pump 92 and connects the hydraulic pump 92 and the support section 65, and the second bracket 62 is attached to the hydraulic pump 92. (second assembly) 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 part 65 regardless of the shape of the hydraulic pump 92 and the shape of the support part 65.
Further, the second bracket 62 has an extension part (second extension part) 62B extending radially outward of the input shaft 92a than the hydraulic pump 92, and the second extension part 62B is It has a connected part (second connected part) 62B1 connected to the support part 65.

According to the above configuration, a region for connecting the second bracket 62 and the support portion 65 can be secured regardless of the shape of the hydraulic pump 92 and the shape of the support portion 65. Thereby, the hydraulic pump 92 can be easily attached to the support portion 65.
Further, the second connected portion 62B1 is a hole through which a fastener V4 is inserted, and the second bracket 62 and the support portion 65 are connected by the fastener V4.

According to the above configuration, the second bracket 62 can be easily and reliably attached to the support portion 65. Moreover, since the second extending portion 62B extends radially outward of the drive shaft 91a than the hydraulic pump 92, a sufficient area can be secured for operating the tool for attaching the fastener V4.
Further, 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 provided with a hole (second knock pin) into which the second knock pin 67c is inserted. A fitting hole) 62B2 is formed.

According to the above configuration, displacement of the input shaft 92a with respect to the support portion 65 can be suppressed, and the drive shaft 91a, the connector 60, and the input shaft 92a can be connected with high accuracy. Thereby, the power output from the drive shaft 91a to the input shaft 92a can be appropriately transmitted without loss.
Further, the second bracket 62 is formed with a first attachment portion 71A to which the first hanging tool 75A is attached.

According to the above configuration, when the second bracket 62 is attached to the hydraulic pump 92 and attached to the support part 65, it can be lifted by the first hanging tool 75A. Therefore, the second bracket 62 and the hydraulic pump 92 can be easily attached to the support portion 65. Furthermore, by lifting the first hanging 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 section 65.

Further, the support portion 65 is formed with a second attachment portion 71B to which a second hanging tool 75B is attached.
According to the above configuration, by hoisting the second hoist 75B in addition to the first hoist 75A, it is possible to easily transport the electric motor 91 and the hydraulic pump 92 assembled to the support portion 65.

Further, in the hydraulic pump 92, a spigot internal fitting part (second spigot internal fitting part) 92b2 is formed around the input shaft 92a, and the second bracket 62 has a mounting hole (in which the second spigot internal fitting part 92b2 is mounted). A second mounting hole) 62a is formed.
According to the above configuration, displacement of the drive shaft 91a with respect to the second bracket 62 can be suppressed, and the drive shaft 91a, the connector 60, and the input shaft 92a can be connected with high accuracy. Thereby, the power output from the drive shaft 91a to the input shaft 92a can be appropriately transmitted without loss.

The swing work machine 1 also includes a connector 60 that connects the drive shaft 91a and the input shaft 92a, the hydraulic pump 92 is attached to the support part 65 via the second bracket 62, and the input shaft 92a is connected to the connector 60. The support portion 65 is a housing that surrounds the radially outer side of the connector 60 in a state where the connector 60 is attached.
According to the above configuration, the support portion 65 can support the hydraulic pump 92 and cover the connector 60. Therefore, it is possible to prevent the connecting tool 60 rotated by the drive shaft 91a from coming into contact with the outside.

Moreover, the method for assembling the swing work machine 1 includes an electric motor 91 that rotates a drive shaft 91a, an input shaft 92a to which power is input from the drive shaft 91a, and an input shaft 92a from which power is input from the drive shaft 91a to the input shaft 92a. A hydraulic pump 92 that is driven by power to discharge hydraulic oil, a support section 65 that supports the electric motor 91 and the hydraulic pump 92, and a hydraulic pump 92 that are separate bodies, and the hydraulic pump 92 and the support section 65 are separate bodies. This is a method for assembling the swing working machine 1, which includes a second bracket 62 that connects the hydraulic pump 92, and a first step of attaching the second bracket 62 to the hydraulic pump 92; and a second step of attaching the pump 92 to the support 65.

According to the above configuration, the hydraulic pump 92 can be easily attached to the support part 65 regardless of the shape of the hydraulic pump 92 and the shape of the support part 65.
The above-described swing work machine 1 includes a swing base 2, a battery unit 90, a support body 50 that supports the battery unit 90 on the swing base 2, an electric motor 91 driven by electric power output from the battery unit 90, and an electric motor. It includes a hydraulic pump 92 that is driven by a motor 91 to discharge hydraulic oil, and a support section 65 that supports the electric motor 91 and the hydraulic pump 92 on a swivel table, and the support section 65 is separated from the support body 50. and is attached to the swivel base 2 via a plurality of mounting devices 70.

According to the above configuration, since the support part 65 supports the electric motor 91 and the hydraulic pump 92 separately from the battery unit 90, vibrations generated by driving the electric motor 91 and pulsations of the hydraulic pump 92 are transmitted to the battery unit 90. Direct transmission can be suppressed. Further, since the battery unit 90 assembly and the electric motor 91 and hydraulic pump 92 assembly 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 suppressed from reaching the battery unit 90 via the support portion 65 and the swivel base 2 . Thereby, it is possible to suppress the battery unit 90 from resonating due to the vibrations and pulsations, amplifying the vibrations, and generating noise.

Further, the support body 50 is fixed to the swivel base 2.
According to the above configuration, since the battery unit 90 placed on the support body 50 is fixed to the swivel base 2, when vibration is transmitted from the swivel base 2, the battery unit 90 mounted on the support body 50 vibrates independently with respect to the swivel base 2. Instead, it vibrates together with the swivel base 2. Therefore, it is possible to suppress the battery unit 90 from resonating due to the vibrations and pulsations, amplifying the vibrations, and generating noise.

The swing work machine 1 also includes a swing stopper (lower upright part) 57 that is erected above the support 50 and attached to at least one of one side and the other side 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 to the swivel base 2, and the battery unit 90 is affected by the vibration and pulsation. It is possible to suppress resonance, amplification of vibrations, etc., and generation of noise.

Further, the support section 65 supports the electric motor 91 and the hydraulic pump 92 in a row in the front-rear direction, and the plurality of mount devices 70 support the electric motor 91 and the hydraulic pump 92 in a plan view when the electric motor 91 and the hydraulic pump 92 are attached to the support section 65. It is located further outward in the width direction than the electric motor 91, the hydraulic pump 92, and the support portion 65.
According to the above configuration, the plurality of mount devices 70 can suppress vibration in the width direction when the swivel base 2 rotates, and can support the electric motor 91, the hydraulic pump 92, and the support section 65 more suitably. can do. Additionally, tools can be easily accessed when attaching the plurality of mounting devices 70 to the support portion 65.

Further, the battery unit 90 is disposed at the center in the width direction at the rear of the swivel base 2, and the electric motor 91 and the hydraulic pump 92 are disposed on the sides 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 plurality of mounting devices 70 can be preferentially disposed in a portion of the swivel base 2 where vibrations are relatively large. Therefore, while improving the durability of the equipment placed on the swivel base 2, it is possible to reduce the number of mounting devices 70 and the size of the mounting devices 70, thereby reducing costs.

In addition, the swing work machine 1 has a first bracket 61 that is separate from the electric motor 91 and connects the electric motor 91 and the support portion 65, and a hydraulic pump 92 that is separate from the A second bracket 62 connects the pump 92 and the support part 65, and a hanging tool is provided on 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. 75 is attached, and by attaching the hanger 75 to the attachment part 71, the electric motor 91 is connected to the support part 65 by the first bracket 61, and the hydraulic pump 92 is supported by the second bracket 62. The connecting structure connected to the portion 65 can be suspended.

According to the above configuration, the assembly including the electric motor 91, the first bracket 61, the support part 65, the second bracket 62, and the hydraulic pump 92 can be easily moved to the plurality of mounting devices 70 by lifting it with the hanging tool 75. can be transported to. Thereby, the assembly can be easily assembled to a plurality of mounting devices 70.
The electric working machine 1 described above is driven by a machine body (swivel base) 2, a support body 50 provided on the rotation base 2, a battery unit 90 placed on the support body 50, and electric power output from the battery unit 90. The support body 50 has a plurality of elongated plate members 52 on which the outer periphery of the bottom of the battery unit 90 is placed, and the battery unit 90 on the plate member 52 is placed. The mounting surface is machined to be smooth.

According to the above configuration, it is possible to support the battery unit 90 with a simple configuration combining the elongated plate members 52, and it is possible to stably support the battery unit 90 while reducing the area to be machined.
Further, the portion of the support body 50 other than the mounting surface of the plate member 52 is not machined.

According to the above configuration, it is possible to reduce the increase in machining cost due to extensive machining.
Further, the support body 50 has a frame member 51 that connects a plurality of plate members 52, and the frame member 51 is fixed to the lower surface and/or side surface of the plate member 52 by welding.
According to the above configuration, even if the mounting surface is machined, the plurality of plate members 52 can be reliably supported without scraping off the welded portions.

Further, the plurality of plate members 52 are fixed to the frame member 51 at a distance from each other.
According to the above configuration, it is possible to secure a welding allowance between the plate members 52 and the frame member 51.
Further, the plate member 52 is machined while being fixed to the frame member 51 by welding.

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.
Further, the plurality of plate members 52 include a first plate part 52a on which the front end of the battery unit 90 is placed, a second plate part 52b on which the rear end of the battery unit 90 is placed, and a second plate part 52b on which the rear end of the battery unit 90 is placed. It includes a third plate part 52c on which one end in the width direction is placed, and a fourth plate part 52d on which the other end in the width direction of the battery unit 90 is placed.

According to the above configuration, the battery unit 90 can be supported reliably and easily using the machined plate member 52.
Further, the support body 50 includes an elongated first connecting plate 53 that connects the widthwise center portion of the first plate portion 52a and the widthwise center portion of the second plate portion 52b.
According to the above configuration, the connection strength between the first plate portion 52a and the second plate portion 52b can be improved with a simple configuration.

The support body 50 also includes 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 of the frame member 51 in the width direction to the other end. The first connecting plate 53 and the second connecting plate 54 are orthogonal to each other.
According to the above structure, the strength of the frame member 51 can be improved with a simple structure.
Further, the battery unit 90 has a plurality of batteries 90a, and the plurality of batteries 90a are arranged adjacent to each other in the width direction. The rear end portions of the plurality of batteries 90a are placed on the second plate portion 52b, and one end portion of one of the batteries 90a in the width direction is placed on the third plate portion 52c. , the other end portion of the battery at the other end in the width direction among the plurality of batteries 90a is placed on the fourth plate portion 52d.

According to the above configuration, it is possible to support a plurality of batteries 90a with a simple configuration combining the elongated plate members 52, and it is possible to stably support the batteries 90a while reducing the area to be machined.
Moreover, the battery unit 90 has a plurality of batteries 90a, and the first connection plate 53 has two adjacent batteries 90a placed thereon among the plurality of batteries 90a, and a space between the two batteries 90a. A ventilation hole 53a is formed therein.

According to the above configuration, heat can be radiated from between the two batteries 90a while reliably supporting the two batteries 90a. Therefore, it is possible to support and cool the battery 90a at the same time.
Further, 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. There is.

According to the above configuration, the battery unit 90 can be reliably fixed regardless of the dimensional error of the battery unit 90.
Further, the electric working machine 1 includes a hydraulic device M provided on the swivel base 2 and a hydraulic pump 92 that discharges hydraulic fluid for operating the hydraulic device M by driving an electric motor 91.
According to the above configuration, the above-mentioned unique effects can be achieved even in the electric working machine 1 having the working device 20 driven by hydraulic oil.

Although the present invention has been described above, the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included. For example, in the embodiment described above, an example was described in which the present invention is applied to a backhoe, which is a turning work machine, but the present invention is not limited to this, but can be applied to various construction machines, civil engineering machines, agricultural machines, etc. Applicable to work equipment.

Furthermore, in the above-described embodiment, the traveling motors ML and MR, the swing motor MT, and each part of the working device 20 are driven by hydraulic pressure, that is, by the driving force of the electric motor 91 via hydraulic oil. Although described above, the configuration is not limited to this, and a configuration may be adopted in which some or all of these are directly driven by the electric motor (electric actuator) 91.

1 Electric work equipment (swivel work equipment)
2 Aircraft (swivel base)
20 Working device 50 Support body 51 Frame member 51E Opening 52 Plate member 52a First plate portion 52b Second plate portion 52c Third plate portion 52d Fourth plate portion 53 First connecting plate 53a Ventilation hole 54 Second connecting plate 55 Fixing tool 90 Battery unit 90a Battery 91 Electric motor 92 Hydraulic pump M Hydraulic equipment

Claims (12)

The aircraft and
a support provided on the aircraft body;
a battery unit placed on the support;
an electric motor driven by electric power output from the battery unit;
Equipped with
The support body has a plurality of elongated plate members on which the outer peripheral part of the bottom of the battery unit is placed,
In the electric working machine, a mounting surface of the plate member on which the battery unit is mounted is machined to be smooth. The electric working machine according to claim 1, wherein a portion of the support other than the mounting surface of the plate member is not subjected to the machining. The support body has a frame member that connects the plurality of plate members,
The electric working machine according to claim 1 or 2, wherein the frame member is fixed to a lower surface and/or a side surface of the plate member by welding. The electric working machine according to claim 3, wherein the plate member is subjected to the machining while being fixed to the frame member by the welding. The electric working machine according to claim 4, wherein the plurality of plate members are spaced apart from each other and fixed to the frame member. The plurality of plate members are
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 portion 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 working machine according to any one of claims 3 to 5, comprising: The support body has an elongated first connecting plate that connects the widthwise center portion of the first plate portion and the widthwise center portion of the second plate portion. 6. The electric working machine according to 6. The support body includes a second connecting plate that passes through the center of an opening formed in the center of the frame member and extends from one end of the frame member in the width direction to the other end. ,
The electric working machine according to claim 7, wherein the first connecting plate and the second connecting plate are perpendicular to each other. The battery unit has a plurality of batteries,
The plurality of batteries are arranged adjacent to each other in the width direction,
The front end portions of the plurality of batteries are placed on the first plate portion,
The second plate portion has rear end portions of the plurality of batteries placed thereon,
On the third plate part, one end part of the battery at one end in the width direction among the plurality of batteries is placed,
The electric working machine according to claim 7 or 8, wherein the fourth plate part has the other end part of the battery at the other end in the width direction, among the plurality of batteries, placed on the fourth plate part. The battery unit has a plurality of batteries,
Any one of claims 7 to 9, wherein the first connecting plate has two adjacent batteries mounted thereon among the plurality of batteries, and a ventilation hole is formed between the two batteries. Electric working machines described in . The support is
a fixture provided on the first plate part or the second plate part and fixing the battery unit;
The electric working machine according to any one of claims 6 to 10, wherein the fixture is attached so as to be adjustable in the front-back direction. Hydraulic equipment provided in the aircraft;
a hydraulic pump that discharges hydraulic oil that operates the hydraulic equipment by driving the electric motor;
The electric working machine according to any one of claims 1 to 11, comprising:

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