Rotating electric machine and work machine

Abstract

To provide a rotating electric machine and a work machine that can be downsized.SOLUTION: A rotating electric machine comprises: a housing in which a stator coil is accommodated and in which an opening is formed; a power line which is connected to the stator coil and led out through the opening; and an external terminal which is disposed on the housing and has a terminal block. The power line is drawn out from the stator coil to one side in an axial direction of the rotating electric machine, connected to the stator coil and the terminal block so as to form a curved portion, and the curved portion is located on one side in the axial direction of the rotating electric machine relative to the terminal block.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a rotating electric machine and a work machine. [Background technology]

[0002] Conventionally, a rotating electric machine having a housing that houses a rotor and a stator is known (see Patent Document 1). For example, an external terminal that connects to an external power source or the like is provided on a rear flange portion (case) of the rotating electric machine. A power line drawn out from the housing is connected to the external terminal by a terminal block. In recent years, the electrification of work machinery such as construction machinery has progressed, and the replacement of hydraulic rotating machines with rotating electric machines is being considered. However, because rotating electric machines have a lower output per volume than hydraulic rotating machines, there is a demand for miniaturization in order to replace them with equivalent output. One method of achieving miniaturization is to make the paths of power lines connected by terminal blocks more compact. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Republished WO2017 / 168971 Summary of the Invention [Problem to be solved by the invention]

[0004] However, depending on the bending radius, length, cross-sectional area, and distance to the terminal block of the power line, the external terminals are likely to be located higher, which may increase the thickness of the case and lead to an increase in the size of the rotating electrical machine.

[0005] An aspect of the present disclosure aims to provide a rotating electric machine and a working machine that can be made smaller. [Means for solving the problem]

[0006] A rotating electric machine according to one aspect of the present disclosure comprises a housing that accommodates a stator coil and has an opening formed therein, a power line connected to the stator coil and pulled out from the opening, and an external terminal arranged on the housing and having a terminal block, wherein the power line is pulled out from the stator coil to one side in the axial direction of the rotating electric machine and connected to the stator coil and the terminal block so as to form a curved portion, and the curved portion is located on one side in the axial direction of the rotating electric machine relative to the terminal block. [Effects of the Invention]

[0007] According to aspects of the present disclosure, it is possible to provide a rotating electric machine and a work machine that can be made smaller. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing a work machine according to an embodiment. [Figure 2] 1 is a cross-sectional view of a rotating electric machine according to an embodiment; [Figure 3] FIG. 2 is a perspective view of a stator according to the embodiment. [Figure 4] 1 is a perspective view showing a power line connection structure according to an embodiment; [Figure 5] FIG. 4 is a perspective view showing a portion where a power line is drawn out from an opening according to the embodiment. [Figure 6] FIG. 2 is a perspective view showing a portion where a connecting member according to the embodiment is connected to a terminal block. [Figure 7] FIG. 10 is a perspective view showing a state in which a plurality of elastic members are removed from the opening according to the embodiment. [Figure 8] FIG. 2 is a perspective view of a connecting member according to an embodiment. [Figure 9] FIG. 2 is a plan view of a plurality of elastic members according to the embodiment. [Figure 10] FIG. 10 is a perspective view of a connecting member according to a comparative example. [Figure 11] 3A and 3B are schematic diagrams illustrating a portion where a connecting member according to an embodiment is connected to a terminal block. [Figure 12]10 is a schematic diagram showing a portion where a connection member according to a comparative example is connected to a terminal block. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In this embodiment, an example will be described in which a rotating electric machine is mounted on a hybrid excavator or an electric excavator (an example of a construction machine) and configured as a swing motor for swinging an upper swing body of the hybrid excavator or the electric excavator.

[0010] In the following description, expressions indicating relative or absolute arrangements, such as "parallel," "orthogonal," "center," and "coaxial," do not only mean such arrangements or states in the strict sense, but also include arrangements or states in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. In the drawings used in the following description, the scale of each component may be changed as appropriate to make each component recognizable.

[0011] <Work machinery> Figure 1 is a schematic diagram showing a work machine according to an embodiment. The work machine 100 according to this embodiment is an electric hydraulic excavator. The work machine 100 may be a manned vehicle that is operated by a driver, or an unmanned vehicle that operates without a driver.

[0012] The work machine 100 includes a running body 120 , an upper rotating body 140 , and a work implement 160 .

[0013] The running body 120 supports the work machine 100 so that it can travel. The running body 120 is equipped with running gear 121. The running gear 121 is, for example, a pair of left and right caterpillars. The running gear 121 is driven by a traveling motor 122. The upper rotating body 140 is supported on the running body 120 so that it can rotate about a rotation axis. The upper rotating body 140 rotates relative to the running body 120 by the rotation motor 114. The upper rotating body 140 has a compartment 141 that houses a drive system.

[0014] The work implement 160 is movably supported on the upper rotating body 140. The work implement 160 is hydraulically driven. The work implement 160 includes a boom 161, an arm 162, and an attachment 163. The attachment 163 is an example of a working tool. In the example shown in FIG. 1, the attachment 163 is a bucket. In the example shown in FIG. 1, the side of the upper rotating body 140 on which the work implement 160 is supported is the front, and the opposite side with respect to the front is the rear. In this embodiment, the left-right direction refers to the left and right relative to the front, and the up-down direction refers to the direction in which the rotation axis of the upper rotating body 140 extends.

[0015] The swing motor 114 is an electric motor (an example of a rotating electric machine) that is driven by electricity. The swing motor 114 swings the upper swing body 140 relative to the traveling body 120.

[0016] <Rotating electric machines> FIG. 2 is a cross-sectional view of the rotating electrical machine 1 according to the embodiment.

[0017] In this embodiment, the rotating electric machine 1 is a swing motor 114. The rotating electric machine 1 includes a rotor 2, a stator 3, and a housing 4 that accommodates the rotor 2 and the stator 3. The rotating electric machine 1 is an inner rotor type motor in which the stator 3 is disposed outside the cylindrical rotor 2. The rotating electric machine 1 is placed vertically so that the rotor shaft 20 of the rotor 2 is parallel to the swing axis.

[0018] In this embodiment, the upper side corresponds to one side parallel to the central axis CL of the rotor shaft 20, and the lower side corresponds to the other side parallel to the central axis CL of the rotor shaft 20. Hereinafter, the direction along the central axis CL of the rotor shaft 20 will be referred to as the "axial direction," the direction perpendicular to the axial direction will be referred to as the "radial direction," and the direction going around the central axis CL of the rotor shaft 20 will be referred to as the "circumferential direction."

[0019] The rotor 2 includes a rotor shaft 20, a rotor core 21, an upper plate 22, and a lower plate 23. The rotor shaft 20 is rotatably supported relative to the housing 4 by bearings 21A and 21B.

[0020] The rotor core 21 is formed, for example, by laminating electromagnetic steel sheets in the axial direction. The rotor core 21 is fitted onto the rotor shaft 20. The rotor core 21 rotates integrally with the rotor shaft 20. A plurality of permanent magnets (not shown) are embedded in the rotor core 21.

[0021] Each of the upper plate 22 and the lower plate 23 is annular plate members arranged coaxially with the rotor shaft 20. The upper plate 22 and the lower plate 23 are fitted to the rotor shaft 20. The upper plate 22 and the lower plate 23 sandwich the rotor core 21 from the outside in the axial direction. The upper plate 22 and the lower plate 23 rotate integrally with the rotor shaft 20 and the rotor core 21.

[0022] The stator 3 is fixed to the inner surface of the housing 4 so as to cover the outer periphery of the rotor 2. The stator 3 includes a cylindrical stator core 30 and a stator coil 31. Like the rotor core 21, the stator core 30 is formed by laminating electromagnetic steel sheets in the axial direction. A plurality of teeth are provided circumferentially on the inner periphery of the stator core 30. The stator coil 31 is wound around the teeth.

[0023] The housing 4 accommodates the rotor 2 and the stator 3. The housing 4 includes a cylindrical body 10, a ceiling 11 that closes the upper opening of the cylinder 10, and a bottom 13 that closes the lower opening of the cylinder 10. The cylinder 10, the ceiling 11, and the bottom 13 form a space 40 inside the housing 4 for accommodating the rotor 2 and the stator 3.

[0024] <Stator> FIG. 3 is a perspective view of the stator 3 according to the embodiment. Referring to Figures 2 and 3 together, the stator 3 comprises a cylindrical stator core 30 having a plurality of slots 30s arranged circumferentially, and a stator coil 31 inserted into each of the plurality of slots 30s and wound around the stator core 30, and having a plurality of end-side extension portions 32e extending outward from a first axial end face 30f1 of the stator core 30 and arranged circumferentially.

[0025] A plurality of slots 30s and a plurality of teeth 30t are arranged alternately around the inner periphery of the stator core 30. The plurality of slots 30s are arranged at equal intervals in the circumferential direction of the stator core 30. For example, an insulating material may be provided inside the slots 30s. Note that the configuration of the slots 30s (such as their arrangement, number, and shape) can be changed according to design specifications.

[0026] In this embodiment, the stator coil 31 is made of rectangular wire. The stator coil 31 is made of a plurality of segment coils 39. For example, the segment coils 39 are rectangular wires with an insulating coating applied to the outer periphery of the wire. The segment coils 39 are not limited to the above, and may also be made up of windings with circular or elliptical cross sections. The configuration of the segment coils 39 can be changed according to the design specifications.

[0027] The stator coil 31 includes a first coil end 32 having a plurality of distal extensions 32e protruding from a first axial end face 30f1 of the stator core 30, and a second coil end 33 protruding from a second end face 30f2 of the stator core 30 opposite the first end face 30f1 in the axial direction. The axial direction of the stator core 30 corresponds to the direction along the central axis CL (see FIG. 2) of the rotor shaft 20. The first end face 30f1 of the stator core 30 corresponds to the upper end face of the stator core 30. The second end face 30f2 of the stator core 30 corresponds to the lower end face of the stator core 30. Note that the radial direction of the stator core 30 is a direction perpendicular to the axial direction, and the circumferential direction is a direction going around the central axis CL.

[0028] In this embodiment, the first coil end 32 is arranged on the opposite side (upper side) of the bottom 13 of the housing 4 in the axial direction. On the other hand, the second coil end 33 is arranged on the same side (lower side) as the bottom 13 of the housing 4 in the axial direction. In this embodiment, the multiple distal extensions 32e are arranged on the opposite side (upper side) of the bottom 13 of the housing 4 in the axial direction.

[0029] The stator 3 of this embodiment further includes a plurality of power lines 35U, 35V, and 35W connected to the plurality of distal extension portions 32e. The distal extension portions 32e include connection extension portions to which the power lines 35U, 35V, and 35W are connected and non-connection extension portions to which the power lines 35U, 35V, and 35W are not connected. The power lines 35U, 35V, and 35W include stranded wires and terminals connected to ends of the stranded wires. A power line connection portion 36 for connecting the power lines 35U, 35V, and 35W is connected to the connection extension portions. The power line connection portion 36 is connected to the terminals of the power lines 35U, 35V, and 35W.

[0030] In this embodiment, the power line connection portion 36 and the terminals of the power lines 35U, 35V, and 35W are connected by fastening with bolts and nuts. The configurations of the power lines 35U, 35V, and 35W and the power line connection portion 36 are not limited to those described above and can be modified according to design specifications. For example, the power lines 35U, 35V, and 35W may include a bus bar, and the bus bar and the connection extension may be welded together. For example, the power lines 35U, 35V, and 35W may include a stranded wire and a terminal connected to an end of the stranded wire, and the terminal and the connection extension may be welded together. For example, the power lines 35U, 35V, and 35W may include a stranded wire and a first terminal connected to an end of the stranded wire, and a second terminal may be connected to the connection extension, and the first terminal and the second terminal may be welded together.

[0031] In this embodiment, the stator coil 31 includes three-phase winding groups 34U1, 34U2, 34V1, 34V2, 34W1, and 34W2 connected in parallel to one another. The three-phase winding groups 34U1, 34U2, 34V1, 34V2, 34W1, and 34W2 are U-phase, V-phase, and W-phase winding groups. The U-phase, V-phase, and W-phase winding groups 34U1, 34U2, 34V1, 34V2, 34W1, and 34W2 are arranged two by two in the circumferential direction of the stator core 30, in the order of U-phase, U-phase, V-phase, V-phase, W-phase, and so on.

[0032] In this embodiment, the stator coil 31 includes a plurality of U-shaped segment coils 39 whose ends are connected to one another. The stator coil 31 is formed by winding a plurality of segment coils 39 whose ends are connected to one another in a wave-like pattern. Note that, although the example in the figure shows a segment coil 39 with a square cross section, a segment coil 39 with a round cross section may also be used. The cross-sectional shape of the segment coil 39 is not limited to the above and can be changed according to design specifications.

[0033] In the illustrated example, when a plurality of segment coils 39 inserted in the circumferential direction of the stator core 30 are considered to be one winding section 34A, 34B, 34C, and 34D, four winding sections 34A, 34B, 34C, and 34D are arranged in the radial direction of the stator core 30. The four winding sections 34A, 34B, 34C, and 34D include a first winding section 34A, a second winding section 34B, a third winding section 34C, and a fourth winding section 34D. The first winding section 34A, the second winding section 34B, the third winding section 34C, and the fourth winding section 34D are arranged in this order from the innermost to the outermost circumference of the stator core 30.

[0034] <Power line connection structure> Fig. 4 is a perspective view showing the connection structure of power lines 35U, 35V, and 35W according to the embodiment. Fig. 5 is a perspective view showing a portion where power lines 35U, 35V, and 35W are drawn out from opening 4h according to the embodiment. Fig. 6 is a perspective view showing a portion where connecting member 60 according to the embodiment is connected to terminal block 50. Fig. 7 is a perspective view showing a state where multiple elastic members 71 and 72 have been removed from opening 4h according to the embodiment. 4 to 7, the rotating electric machine 1 of this embodiment includes a housing 4 that accommodates a stator coil 31 and has an opening 4h formed therein, power lines 35U, 35V, and 35W that are connected to the stator coil 31 and drawn out from the opening 4h, and an external terminal 51 that is disposed in the housing 4 and has a terminal block 50. The power lines 35U, 35V, and 35W are drawn out from the stator coil 31 to one side in the axial direction of the rotating electric machine 1 and are connected to the stator coil 31 and the terminal block 50 so as to form a curved portion 35a. The curved portion 35a is located on one side of the terminal block 50 in the axial direction of the rotating electric machine 1.

[0035] The power lines 35U, 35V, and 35W are provided with a connection member 60 for connecting the power lines 35U, 35V, and 35W to the terminal block 50. The connection member 60 connects the power lines 35U, 35V, and 35W drawn out from the opening 4h to the terminal block 50. The terminal block 50 is disposed at an axial distance H from one axial end position TP of the power lines 35U, 35V, and 35W. The one axial end position TP refers to the position of each of the multiple power lines 35U, 35V, and 35W that is closest to one side in the axial direction along the path extending from the opening 4h to the terminal block 50.

[0036] When viewed from the axial direction of the rotating electric machine 1, the opening 4h is formed in an arc shape that follows the circumferential direction of the rotating electric machine 1. The axial direction of the rotating electric machine 1 corresponds to the direction along the central axis CL (see FIG. 2) of the rotor shaft 20. The circumferential direction of the rotating electric machine 1 is the direction going around the central axis CL, and the radial direction is the direction perpendicular to the axial direction.

[0037] In the illustrated example, the lengths (total lengths) of the multiple power lines 35U, 35V, and 35W are different from one another. Note that the lengths of the multiple power lines 35U, 35V, and 35W are not limited to the above and may be the same. The lengths of the multiple power lines 35U, 35V, and 35W can be changed according to design specifications.

[0038] The housing 4 includes a case 9 that houses the power lines 35U, 35V, 35W, etc. that are drawn out from the opening 4h of the housing 4. The case 9 includes a peripheral wall portion 90 that stands upright from the upper surface of the ceiling portion 11 so as to surround the power lines 35U, 35V, 35W, etc. that are drawn out from the opening 4h of the housing 4, and a lid portion 97 (see FIG. 2) that closes the upper opening of the peripheral wall portion 90.

[0039] 4, the peripheral wall portion 90 is formed in a pentagonal frame shape with rounded corners when viewed in the axial direction of the rotating electric machine 1. When viewed in the axial direction of the rotating electric machine 1, the peripheral wall portion 90 includes a first wall portion 91 and a second wall portion 92, each of which has one end connected to the other end of the first wall portion 91 and the second wall portion 92 and which combine to form an L-shape, a third wall portion 93 and a fourth wall portion 94, each of which has one end connected to the other end of the first wall portion 91 and the other end of the second wall portion 92 and which are arranged parallel to each other via power lines 35U, 35V, 35W, etc., and a fifth wall portion 95, which is connected to the other end of the third wall portion 93 and the fourth wall portion 94 and which is arranged perpendicular to the wall portions 93 and 94. Note that the configuration (shape, components, etc.) of the peripheral wall portion 90 is not limited to the above and can be changed according to design specifications.

[0040] An upright wall portion 96 is provided inside the fourth wall portion 94, standing from the upper surface of the ceiling portion 11 so as to separate the space on the second wall portion 92 side from the space on the fifth wall portion 95 side. When viewed in the axial direction of the rotating electric machine 1, the upright wall portion 96 extends in a direction perpendicular to the direction in which the fourth wall portion 94 (excluding the rounded corners) extends.

[0041] The lid portion 97 is detachably attached to the peripheral wall portion 90. In this embodiment, the lid portion 97 and the peripheral wall portion 90 are connected by fastening with a bolt and a female thread portion. A plurality of female thread portions are provided on the outer portion of the upper outer periphery of the peripheral wall portion 90. Note that the manner of connection between the lid portion 97 and the peripheral wall portion 90 is not limited to the above and can be changed according to design specifications.

[0042] Terminal block 50 is disposed with an axial difference H from one axial end position TP of power lines 35U, 35V, 35W. Axial difference H refers to the axial difference between one axial end position TP of power lines 35U, 35V, 35W and one surface of terminal block 50.

[0043] The terminal block 50 is disposed inside a portion of the fifth wall portion 95 of the peripheral wall portion 90 on the fourth wall portion 94 side. A plurality of terminal blocks 50 are provided corresponding to the plurality of power lines 35U, 35V, 35W. When viewed from the axial direction of the rotating electric machine 1, the plurality of terminal blocks 50 are disposed side by side in a direction perpendicular to the direction in which the fourth wall portion 94 (excluding the rounded corners) extends.

[0044] The power lines 35U, 35V, 35W drawn out from the opening 4h are connected to external terminals 51 by terminal blocks 50. The external terminals 51 are arranged outside the portion of the fifth wall portion 95 of the peripheral wall portion 90 on the fourth wall portion 94 side. The terminal blocks 50 extend further inward from the portion of the external terminals 51 that protrudes inward from the fifth wall portion 95.

[0045] In the example shown in the figure, the power line 35W, which is the shortest of the multiple power lines 35U, 35V, and 35W, is pulled upward from the portion of the opening 4h on the second wall portion 92 side, then extends while curving circumferentially, and then extends toward the terminal block 50 of the multiple terminal blocks 50 that is closest to the opening 4h (the terminal block 50 farthest from the fourth wall portion 94). Of the remaining power lines 35U, 35V, one power line 35V is pulled upward from the portion of the opening 4h on the third wall portion 93 side, then extends while curving circumferentially, passing over the power line 35W, and then extends toward the terminal block 50 second closest to the opening 4h among the multiple terminal blocks 50 (the terminal block 50 second farthest from the fourth wall portion 94). The remaining power line 35U is pulled upward from the boundary between the first wall portion 91 and the second wall portion 92 at the opening 4h, then extends while curving circumferentially, passing over the power line 35V, and then extends toward the terminal block 50 furthest from the opening 4h among the multiple terminal blocks 50 (the terminal block 50 closest to the fourth wall portion 94).

[0046] <Connection parts> FIG. 8 is a perspective view of a connection member 60 according to the embodiment. Referring also to Figure 8, the connecting member 60 comprises a tubular portion 61 to which the power lines 35U, 35V, and 35W drawn out from the opening 4h are connected, and an extension portion 62 that extends from the tubular portion 61 so as to intersect with the axial direction of the tubular portion 61 and is connected to the terminal block 50.

[0047] In the illustrated example, the cylindrical portion 61 is formed in a closed C-shape when viewed in the axial direction of the cylindrical portion 61. The shape of the cylindrical portion 61 is not limited to the above, and it may be an open C-shape or a cylindrical shape. The shape of the cylindrical portion 61 can be changed according to design specifications.

[0048] The extending portion 62 extends from a circumferential portion of the tubular portion 61 (a portion opposite the portion where the C-shaped tubular portion 61 closes) so as to intersect with the axial direction of the tubular portion 61. The extending portion 62 is formed by bending a portion of the tubular portion 61. The tubular portion 61 and the extending portion 62 are integrally formed from the same member. However, the tubular portion 61 and the extending portion 62 are not limited to the above, and may be integrally formed by joining different members together. The forming manner of the tubular portion 61 and the extending portion 62 can be changed according to design specifications.

[0049] In this embodiment, the extension 62 and the terminal block 50 are connected by fastening a bolt to a female thread portion of the terminal block 50. The female thread portion is provided on the terminal block 50. A through hole through which the bolt passes is formed in the extension 62. Note that the manner of connection between the extension 62 and the terminal block 50 is not limited to the above and can be changed according to design specifications.

[0050] In this embodiment, when viewed from a direction perpendicular to the axis 61C of the tubular portion 61 and the straight line 62C along the extending portion 62, the angle A formed between the axis 61C of the tubular portion 61 and the straight line 62C along the extending portion 62 is greater than 0 degrees and not greater than 90 degrees. The angle A corresponds to the angle A of the direction in which the extending portion 62 is bent relative to the tubular portion 61. In the example shown in the figure, the angle A is approximately 60 degrees.

[0051] Note that angle A is not limited to the above and can be changed depending on the bending radius, length, and cross-sectional area of power lines 35U, 35V, and 35W, and the distance from opening 4h to terminal block 50. For example, angle A may be 10 degrees or more and 80 degrees or less, 20 degrees or more and 70 degrees or less, or 30 degrees or more and 60 degrees or less.

[0052] 6, in this embodiment, the power lines 35U, 35V, and 35W drawn out from the opening 4h curve and extend toward the other axial side of the rotating electric machine 1 just before the terminal block 50. The cylindrical portion 61 is connected to the ends of the curved power lines 35U, 35V, and 35W. The extending portion 62 extends from the cylindrical portion 61 obliquely intersecting the axial direction of the cylindrical portion 61 toward the terminal block 50. The extending portion 62 extends along the upper surface of the terminal block 50.

[0053] A plurality of connection members 60 are provided corresponding to the plurality of power lines 35U, 35V, and 35W. In the example shown in the figure, the shapes of the plurality of connection members 60 are the same. However, the shapes of the plurality of connection members 60 are not limited to those described above and may be different from one another. The shapes of the plurality of connection members 60 can be changed according to design specifications.

[0054] <Elastic material> FIG. 9 is a plan view of a plurality of elastic members 71 and 72 according to the embodiment. 9, the rotating electric machine 1 further includes a plurality of elastic members 71, 72 each having recesses 71a, 72a formed along the outer peripheries of the power lines 35U, 35V, 35W, and disposed adjacent to each other in the radial direction so as to close the opening 4h. The elastic members 71, 72 are attached to the opening 4h with the recesses 71a, 72a facing each other via the power lines 35U, 35V, 35W.

[0055] 4 and 9, in this embodiment, when viewed in the axial direction of the rotating electric machine 1, the opening 4h and each of the plurality of elastic members 71, 72 are formed in an arc shape along the circumferential direction of the rotating electric machine 1. Each of the plurality of elastic members 71, 72 is formed with a plurality of recesses 71a, 72a spaced apart in the circumferential direction.

[0056] In this embodiment, the shape of the combination of the opposing recesses 71a, 72a is elliptical when viewed in the axial direction of the rotating electric machine 1. Note that Fig. 9 shows gaps extending along the circumferential direction of the rotating electric machine 1 between the multiple elastic members 71, 72. When the multiple elastic members 71, 72 are attached to the opening 4h, it is preferable that the recesses 71a, 72a of the multiple elastic members 71, 72 and the power lines 35U, 35V, 35W are closely attached to each other, and that the gaps are small in the portions of the multiple elastic members 71, 72 other than the recesses 71a, 72a.

[0057] 7, before the multiple elastic members 71, 72 are attached to the opening 4h, the multiple power lines 35U, 35V, 35W are each drawn out from the opening 4h. The opening 4h has a groove 4m for attaching the multiple elastic members 71, 72. The groove 4m is formed in an arc shape along the circumferential direction of the rotating electric machine 1 so as to fit the combined shape of the multiple elastic members 71, 72.

[0058] For example, the procedure for attaching the plurality of elastic members 71 and 72 is as follows. First, one elastic member 71 of the multiple elastic members 71, 72 is inserted into one side of the opening 4h (the radially inner side of the rotating electric machine 1 shown in FIG. 4). At this time, each recess 71a of the elastic member 71 is aligned with one side portion of the outer periphery of each power line 35U, 35V, 35W.

[0059] Next, the other elastic member 72 (the remaining elastic member 72) of the multiple elastic members 71, 72 is inserted into the remaining side of the opening 4h (the radially inner side of the rotating electric machine 1 shown in FIG. 4). At this time, each recess 72a of the elastic member 72 is aligned with the remaining side of the outer periphery of each power line 35U, 35V, 35W.

[0060] By the above procedure, the plurality of elastic members 71 and 72 can be attached to the opening 4h. The procedure for attaching the multiple elastic members 71, 72 is not limited to the above, and may be performed in the reverse order, or the multiple elastic members 71, 72 may be attached at the same time. The procedure for attaching the multiple elastic members 71, 72 can be changed according to design specifications. After the elastic members 71, 72 are attached to the opening 4h, a blocking member (not shown) for blocking the gaps between the elastic members 71, 72 may be provided on the upper surfaces of the elastic members 71, 72.

[0061] <Retaining member> 4 to 6 , in this embodiment, the rotating electric machine 1 further includes a holding member 81 that holds the power lines 35U, 35V, and 35W in the housing 4. The holding member 81 holds the curved portions 35a of the power lines 35U, 35V, and 35W. A plurality of holding members 81 are provided. Each of the plurality of holding members 81 is disposed closer to the terminal block 50 than the axial end position TP of each of the plurality of power lines 35U, 35V, and 35W. Each of the plurality of holding members 81 is disposed midway along the portion of each of the plurality of power lines 35U, 35V, and 35W that curves toward the other axial side of the rotating electric machine 1 between the axial end position TP and the terminal block 50. Each of the plurality of holding members 81 has a ring shape that surrounds the outer periphery of the power lines 35U, 35V, and 35W and includes a holding portion for holding the power lines 35U, 35V, and 35W, and the holding portion is disposed at a position higher than the terminal block 50.

[0062] A plurality of holding members 81 are provided corresponding to the plurality of power lines 35U, 35V, 35W. When viewed in the axial direction of the rotating electric machine 1, the plurality of holding members 81 are arranged side by side in a direction perpendicular to the direction in which the fourth wall portion 94 (excluding the rounded corners) extends (in other words, in a direction along the upper edge of the standing wall portion 96). For example, each of the plurality of holding members 81 is fixed to an upper portion of the standing wall portion 96. For example, the upper portion of the standing wall portion 96 may be provided with a plurality of engagement portions corresponding to each of the plurality of holding members 81.

[0063] In the illustrated example, the holding member 81 has an annular shape surrounding the outer periphery of the power lines 35U, 35V, and 35W, and includes a holding portion for holding the power lines 35U, 35V, and 35W, and a fixing portion connected to the holding portion for fixing the holding portion in a fixed position. In the illustrated example, the multiple holding members 81 each have the same configuration. However, the configuration of each of the multiple holding members 81 is not limited to the above, and may be different from each other. The configuration of each of the multiple holding members 81 can be changed according to design specifications.

[0064] <Restraining member> In this embodiment, the rotating electric machine 1 further includes a restraining member 82 that is disposed between the opening 4h and the holding member 81 when viewed in the axial direction of the rotating electric machine 1. The restraining member 82 collectively restrains the multiple power lines 35U, 35V, 35W so that each of the multiple power lines 35U, 35V, 35W is disposed at a distance from the cover portion 97 of the rotating electric machine 1.

[0065] The restraining member 82 is disposed closer to the opening 4h than the upright wall portion 96. In the example shown in the figure, the restraining member 82 has a ring shape that collectively surrounds the plurality of power lines 35U, 35V, 35W and includes a restraining portion for restraining the power lines 35U, 35V, 35W. Note that the configuration of the restraining member 82 is not limited to the above and can be changed according to design specifications.

[0066] In the illustrated example, power lines 35U, 35V, and 35W drawn out from opening 4h extend in a curve so as to pass on one side of the axial direction of rotating electric machine 1 (the upper side inside case 9) just before restraining member 82. Generally, the bending radius of the stranded wire used for power lines 35U, 35V, and 35W needs to be several times (for example, two to four times or more) the diameter of the stranded wire. Therefore, power lines 35U, 35V, and 35W need to make a large detour (extend in a curve) as shown in FIG. 5, and pass on the upper side inside case 9.

[0067] From the viewpoint of improving the accuracy of assembling the power lines 35U, 35V, and 35W and reducing the load on other components, it is preferable to memorize (treat) the bending shapes of the power lines 35U, 35V, and 35W before assembling the power lines 35U, 35V, and 35W. For example, it is preferable to memorize the shapes of the power lines 35U, 35V, and 35W before assembly, which will follow the paths of the power lines 35U, 35V, and 35W after assembly (for example, the shapes shown in FIGS. 4 to 6).

[0068] <Action and effect> As described above, the rotating electric machine 1 of this embodiment includes the housing 4 that accommodates the stator coil 31 and has the opening 4h formed therein, the power lines 35U, 35V, and 35W that are connected to the stator coil 31 and drawn out from the opening 4h, and the external terminal 51 that is disposed in the housing 4 and has the terminal block 50. The power lines 35U, 35V, and 35W are drawn out from the stator coil 31 to one side in the axial direction of the rotating electric machine 1 and are connected to the stator coil 31 and the terminal block 50 so as to form the curved portion 35a. The curved portion 35a is located on one side of the terminal block 50 in the axial direction of the rotating electric machine 1. For example, if the power lines drawn out from the opening are extended straight toward the terminal block to match the height of the bending radius in order to ensure a sufficient bending radius, the position of the terminal block will likely be higher, and the external terminals will also likely be higher. If the external terminals are positioned higher, the thickness of the case will increase, which could lead to an increase in the size of the rotating electrical machine. In contrast, according to the present embodiment, the curved portions 35a of the power lines 35U, 35V, and 35W are positioned on one side of the terminal block 50 in the axial direction of the rotating electric machine 1, thereby ensuring the bending radius of the power lines 35U, 35V, and 35W drawn out from the opening 4h, and by arranging the terminal block 50 at a position lower than the height of this bending radius, it is possible to reduce the thickness of the case 9. Therefore, it is possible to provide a rotating electric machine 1 that can be made smaller.

[0069] In the present embodiment, the power lines 35U, 35V, and 35W include a connecting member 60 for connecting the power lines 35U, 35V, and 35W to the terminal block 50. The connecting member 60 includes a cylindrical portion 61 to which the power lines 35U, 35V, and 35W drawn out from the opening 4h are connected, and an extending portion 62 that extends from the cylindrical portion 61 so as to intersect with the axial direction of the cylindrical portion 61 and is connected to the terminal block 50. For example, there is a ring terminal (a connection member according to a comparative example shown in FIG. 10) that has an extension portion that extends from a cylindrical portion in a direction parallel to the axial direction of the cylindrical portion. FIG. 12 shows an example in which this connection member according to the comparative example is connected to a terminal block. As shown in FIG. 12, if the power line is extended straight toward the terminal block to match the height of the bending radius in order to ensure the bending radius of the power line drawn out from the opening, the position of the terminal block will be high, and there is a high possibility that the position of the external terminal will also be high. If the position of the external terminal is high, the thickness of the case will increase, which may lead to an increase in the size of the rotating electric machine. In contrast, according to the present embodiment, the extending portion 62 extends from the cylindrical portion 61 so as to intersect with the axial direction of the cylindrical portion 61 and is connected to the terminal block 50. This allows the extending portion 62 to be connected to the terminal block 50 at a position lower than the height of the bending radius while ensuring the bending radius of the power lines 35U, 35V, 35W drawn out from the opening 4h. Therefore, since the extending portion 62 is connected to the terminal block 50 at a lower position, the thickness of the case 9 can be reduced by the amount equivalent to that, as shown in FIG. 11 . Therefore, it is possible to provide a rotating electric machine 1 that can be made smaller.

[0070] In this embodiment, when viewed from a direction perpendicular to both the axis 61C of the tubular portion 61 and the straight line 62C along the extension portion 62, the angle A formed between the axis 61C of the tubular portion 61 and the straight line 62C along the extension portion 62 is greater than 0 degrees and less than 90 degrees. According to this embodiment, the bending radius of the power lines 35U, 35V, and 35W can be adjusted within the range of angle A exceeding 0 degrees and not exceeding 90 degrees, which contributes to improving the degree of freedom in arranging the power lines 35U, 35V, and 35W.

[0071] In this embodiment, the power lines 35U, 35V, and 35W drawn out from the opening 4h curve and extend toward the other axial side of the rotating electric machine 1 just before the terminal block 50. The cylindrical portion 61 is connected to the ends of the curved power lines 35U, 35V, and 35W. The extension portion 62 extends from the cylindrical portion 61 toward the terminal block 50, intersecting obliquely with the axial direction of the cylindrical portion 61. According to this embodiment, the ends of the power lines 35U, 35V, and 35W that extend and curve toward the other axial side of the rotating electric machine 1 just before the terminal block 50 can be positioned low, and the extension portions 62 can be connected to the terminal block 50 at this low position. Therefore, it is not necessary to bend the power lines 35U, 35V, and 35W drawn out from the opening 4h multiple times in an S-shape. It is also not necessary to ensure a large distance from the opening 4h to the terminal block 50. Therefore, it is possible to shorten the distance from the opening 4h to the terminal block 50 while ensuring the bending radius of the power lines 35U, 35V, and 35W. This contributes to further miniaturization.

[0072] In this embodiment, the stator coil 31 is made of rectangular wire. According to this embodiment, the stator coil 31 can be more easily miniaturized than when it is made of round wire, which contributes to further miniaturization. Furthermore, rectangular wire is harder than round wire, so there are cases where it is desirable to extend the wire in a straight line. Even in this case, the bending radius of the power lines 35U, 35V, and 35W connected to the ends of the straight rectangular wire and drawn out from the opening 4h can be secured as described above, which is a significant practical benefit.

[0073] In this embodiment, the rotating electric machine 1 further includes a plurality of elastic members 71, 72 each having recesses 71a, 72a formed along the outer peripheries of the power lines 35U, 35V, 35W and arranged adjacent to each other to close the opening 4h. The plurality of elastic members 71, 72 are attached to the opening 4h with the recesses 71a, 72a facing each other via the power lines 35U, 35V, 35W. For example, if a single elastic member with a hole is provided, the power line must be passed through the hole from one side of the opening of the hole, which makes assembly difficult and limits the work sequence. In contrast, according to this embodiment, by providing multiple elastic members 71, 72, each having a recess 71a, 72a, the elastic members 71, 72 can be attached to the opening 4h even after connecting terminals or the like to the power lines 35U, 35V, and 35W. This facilitates assembly and eliminates any limitations on the assembly sequence. Furthermore, by forming each recess 71a, 72a along the outer periphery of the power lines 35U, 35V, and 35W, the elastic members 71, 72 can retain their position in the opening 4h. This contributes to vibration suppression of the power lines 35U, 35V, and 35W. Furthermore, compared to a conventional grommet (specifically, an elastic member with a hole formed in it that is larger than the diameter of the power line), this reduces the gap, thereby reducing the amount of oil inflow and leakage. This also contributes to reducing temperature rise and oil-induced resin degradation.

[0074] In this embodiment, when viewed in the axial direction of the rotating electric machine 1, the opening 4h and each of the multiple elastic members 71, 72 are formed in an arc shape along the circumferential direction of the rotating electric machine 1. Each of the multiple elastic members 71, 72 has multiple recesses 71a, 72a formed at intervals in the circumferential direction. According to this embodiment, even when a plurality of power lines 35U, 35V, and 35W are provided, each power line 35U, 35V, and 35W can be held by each recess 71a, 72a formed in each of the plurality of elastic members 71, 72. This contributes to suppressing vibration of each power line 35U, 35V, and 35W.

[0075] In this embodiment, the shape of the recesses 71a and 72a facing each other combined together is an ellipse when viewed in the axial direction of the rotary electric machine 1. According to this embodiment, the holding force of the power lines 35U, 35V, and 35W can be improved in the minor axis direction of the elliptical shape, and the ease of assembly in terms of dimensional errors, etc. can be improved in the major axis direction of the elliptical shape. Furthermore, compared to when a conventional grommet is provided, the gap can be made smaller, thereby further reducing the amount of oil that flows in and leaks.

[0076] In this embodiment, the rotating electric machine 1 further includes a holding member 81 that holds the power lines 35U, 35V, and 35W in the housing 4. The holding member 81 holds the curved portions 35a of the power lines 35U, 35V, and 35W. According to this embodiment, the holding member 81 can hold the power lines 35U, 35V, and 35W closer to the terminal block 50 than the axial end position TP. This contributes to further suppressing vibration of the power lines 35U, 35V, and 35W. In addition, the power lines 35U, 35V, and 35W can be held close to the fastening portion between the connection member 60 and the terminal block 50, which contributes to preventing loosening of the fastening portion. In addition, the extension portion 62 can be connected to the terminal block 50 at the above-mentioned low position while ensuring the bending radius of the power lines 35U, 35V, and 35W extending from the axial end position TP.

[0077] In this embodiment, a plurality of power lines 35U, 35V, and 35W are provided. The rotating electric machine 1 further includes a restraining member 82 that is disposed between the opening 4h and the holding member 81 when viewed in the axial direction of the rotating electric machine 1. The restraining member 82 collectively restrains the plurality of power lines 35U, 35V, and 35W such that the plurality of power lines 35U, 35V, and 35W are disposed at a distance from each other relative to a lid portion 97 of the rotating electric machine 1. According to this embodiment, the restraining member 82 can restrain each of the multiple power lines 35U, 35V, and 35W while keeping them spaced apart from the lid portion 97. This contributes to further suppressing vibration of the power lines 35U, 35V, and 35W. In addition, it is possible to prevent the power lines 35U, 35V, and 35W from coming into contact with the lid portion 97 and being damaged.

[0078] However, when using twisted wire and ring terminals, which are commonly used as power lines, issues arise, such as increased volume due to restrictions on bending radius, resonance of the wire due to external vibrations, and loosening of the terminals. Because twisted wire has a lower limit on its bending radius depending on its cross-sectional area, thick twisted wires carrying large currents, such as those used in construction machinery, will require large detours in certain locations, raising concerns about increased volume and reduced flexibility in routing. Furthermore, because rotating electrical machines in construction machinery are subject to greater external forces than those in automobiles, there is a concern that the power lines will vibrate and resonate, potentially causing loosening of the ring terminals.

[0079] In contrast, in this embodiment, by providing an extension portion 62 that extends from the cylindrical portion 61 so as to intersect the axial direction of the cylindrical portion 61 and is connected to the terminal block 50, it is possible to suppress an increase in volume while maintaining the lower limit of the bending radius of the stranded wire. Furthermore, by providing a plurality of elastic members 71, 72 each having recesses 71a, 72a formed along the power lines 35U, 35V, 35W, it is possible to provide a holding force when the elastic members 71, 72 are attached to the opening 4h. Therefore, even when a large external force is applied to the rotating electric machine 1 compared to an automobile, etc., it is possible to suppress vibration and resonance of the power lines 35U, 35V, 35W, thereby suppressing the occurrence of loosening of the terminals, etc.

[0080] <Modification> In the above-described embodiment, the power line includes a connecting member for connecting the power line to the terminal block, and the connecting member includes a cylindrical portion to which the power line drawn out from the opening is connected and an extension portion that extends from the cylindrical portion so as to intersect with the axial direction of the cylindrical portion and connect to the terminal block. However, this is not limited to this. For example, the connecting member may be a round terminal that includes an extension portion that extends from the cylindrical portion in a direction parallel to the axial direction of the cylindrical portion. The configuration of the connecting member can be changed according to design specifications.

[0081] In the above-described embodiment, an example was described in which the angle formed between the axis of the cylindrical portion and the line along the extension portion, when viewed from a direction perpendicular to both the axis of the cylindrical portion and the line along the extension portion, is greater than 0 degrees and less than or equal to 90 degrees. However, this is not limited to this. For example, the angle formed between the axis of the cylindrical portion and the line along the extension portion, when viewed from a direction perpendicular to both the axis of the cylindrical portion and the line along the extension portion, may be greater than 90 degrees. The angle formed between the axis of the cylindrical portion and the line along the extension portion, when viewed from a direction perpendicular to both the axis of the cylindrical portion and the line along the extension portion, can be changed according to design specifications.

[0082] In the above-described embodiment, the power line drawn out from the opening is curved toward the other axial side of the rotating electric machine just before the terminal block, but this is not limiting. For example, the power line drawn out from the opening may be curved toward the other axial side of the rotating electric machine just behind the terminal block. The manner in which the power line extends can be changed according to the design specifications.

[0083] In the above-described embodiment, the cylindrical portion is connected to the end of the curved power line, but this is not limiting. For example, the cylindrical portion may be connected to a portion (midway) of the curved power line before the end. The connection mode of the cylindrical portion can be changed according to design specifications.

[0084] In the above-described embodiment, an example has been described in which the extension portion extends from the cylindrical portion obliquely across the axial direction of the cylindrical portion toward the terminal block, but this is not limited thereto. For example, the extension portion may extend from the cylindrical portion obliquely across the axial direction of the cylindrical portion toward a direction different from the terminal block. For example, the extension portion may extend toward a connecting member connected to the terminal block. For example, the extension portion may be directly connected to the terminal block, or may be indirectly connected via a connecting member or the like. The connection mode of the extension portion can be changed according to design specifications.

[0085] In the above-described embodiment, the stator coil is made of rectangular wire, but this is not limiting. For example, the stator coil may be made of round wire. The configuration of the stator coil can be changed according to the design specifications.

[0086] In the above-described embodiment, the rotating electric machine further includes a plurality of elastic members each having a recess formed along the outer periphery of the power line and arranged adjacent to each other to close the opening, and the plurality of elastic members are attached to the opening with the recesses facing each other across the power line. However, this is not limited to this. For example, the rotating electric machine may include a single elastic member having a hole formed therein. For example, the rotating electric machine may include a conventional grommet as the elastic member. The form of the elastic member may be changed depending on the design specifications.

[0087] In the above-described embodiment, an example has been described in which, when viewed from the axial direction of the rotating electric machine, the opening and each of the multiple elastic members are formed in an arc shape along the circumferential direction of the rotating electric machine, and each of the multiple elastic members has multiple recesses formed at intervals in the circumferential direction. However, this is not limited to this. For example, each of the multiple elastic members may be divided in the circumferential direction of the rotating electric machine. For example, multiple elastic members may be provided corresponding to each of the multiple power lines. For example, one elastic member may be provided for each power line of each phase. The installation mode of the elastic members may be changed according to design specifications.

[0088] In the above-described embodiment, the shape of the combination of the opposing recesses as viewed in the axial direction of the rotating electric machine is an ellipse, but this is not limited thereto. For example, the shape of the combination of the opposing recesses as viewed in the axial direction of the rotating electric machine may be an oval or a perfect circle. The shape of the combination of the opposing recesses as viewed in the axial direction of the rotating electric machine can be changed according to the design specifications.

[0089] In the above-described embodiment, the rotating electric machine further includes a holding member that holds the power line in the housing, and the holding member holds the curved portion of the power line. However, this is not limiting. For example, the holding member may hold a portion of the power line other than the curved portion. For example, the rotating electric machine may not include a holding member. The installation mode of the holding member can be changed depending on the design specifications.

[0090] In the above-described embodiment, an example has been described in which a plurality of power lines are provided, the rotating electric machine further includes a restraining member disposed between the opening and the holding member as viewed in the axial direction of the rotating electric machine, and the restraining member collectively restrains the plurality of power lines so that each of the plurality of power lines is spaced apart from the cover portion of the rotating electric machine. However, this is not limited to this. For example, the restraining member may collectively restrain the plurality of power lines so that each of the plurality of power lines is in contact with the cover portion of the rotating electric machine. For example, the rotating electric machine may not include the restraining member. The installation manner of the restraining member can be changed according to design specifications.

[0091] In the above-described embodiment, the stator coil has been described as having three-phase winding groups connected in parallel, but this is not limiting. For example, the stator coil may have three-phase winding groups connected in series. The winding groups and the configuration of the stator (e.g., the relationship between poles, phases, and slots) can be changed according to design specifications.

[0092] In the above-described embodiment, the stator coil is described as including a plurality of U-shaped segment coils whose ends are connected to each other, but this is not limiting. For example, the stator coil may include a coil wound in a continuous wave pattern. The configuration of the stator coil can be changed according to the design specifications.

[0093] In the above-described embodiment, the rotating electric machine includes a rotor, the stator, and a housing that accommodates the rotor and the stator, and the plurality of distal extensions are disposed on the axially opposite side of the housing from the bottom. However, this is not limiting. For example, the plurality of distal extensions may be disposed on the same axial side as the bottom of the housing (the opposite side from the opening). The arrangement of the plurality of distal extensions can be changed according to design specifications.

[0094] In the above-described embodiment, the rotating electric machine is mounted on a hybrid excavator or an electric shovel, and an electric swing motor for swinging the upper swing body of the hybrid excavator or the electric shovel has been described as an example, but the present invention is not limited to this. For example, the rotating electric machine may be mounted on other work machines such as a wheel loader, a bulldozer, or a dump truck. For example, the rotating electric machine may be configured as a drive motor for driving a work machine or a drive motor for driving a traveling device. The type of work machine on which the rotating electric machine is mounted and the object that the rotating electric machine drives can be changed depending on the design specifications.

[0095] In the above-described embodiment, the rotating electric machine is described as being vertically disposed so that the rotor shaft is parallel to the rotation axis, but this is not limiting. For example, the rotating electric machine may be horizontally disposed so that the rotor shaft is perpendicular to the rotation axis. For example, the rotating electric machine may be disposed at an angle so that the rotor shaft intersects the rotation axis at an angle. The arrangement of the rotating electric machine can be changed according to the design specifications.

[0096] In the above-described embodiment, the rotating electric machine is an inner rotor type rotating electric machine in which a stator is disposed outside a cylindrical rotor, but the present invention is not limited to this. For example, the rotating electric machine may be an outer rotor type rotating electric machine in which a stator is disposed inside a cup-shaped rotor. The type of rotating electric machine can be changed depending on the design specifications.

[0097] In the above-described embodiment, the rotating electric machine is described as a motor that drives and rotates a rotor by passing an alternating current through a stator coil, but the present invention is not limited to this. For example, the rotating electric machine may be a generator that generates electricity by rotating a rotor using power from an engine or the like. The configuration of the rotating electric machine can be changed according to design specifications.

[0098] Although one embodiment has been described above with reference to the drawings, the specific configuration is not limited to that described above, and additions, omissions, substitutions, and other modifications to the configuration are possible within the scope of the present disclosure, and the above-described embodiments can also be combined as appropriate. [Explanation of symbols]

[0099] 1...rotating electric machine, 4...housing, 4h...opening, 31...stator coil, 35U, 35V, 35W...power line, 35a...curved portion, 50...terminal block, 60...connecting member, 61...tubular portion, 61C...axis, 62...extending portion, 62C...straight line, 71, 72...elastic member, 71a, 72a...recess, 81...holding member, 82...restraining member, 100...working machine, 114...swing motor, 120...traveling body, 140...upper swing body, 160...working machine, A...angle, H...axial difference, TP...axial one end position

Claims

1. a housing that accommodates the stator coil and has an opening formed therein; a power line connected to the stator coil and drawn out from the opening; an external terminal disposed in the housing and having a terminal block; the power line is drawn from the stator coil to one side in the axial direction of the rotating electric machine and connected to the stator coil and the terminal block so as to form a curved portion; the curved portion is located on one side of the terminal block in the axial direction of the rotating electric machine. Rotating electric motor.

2. the power line includes a connection member for connecting the power line to the terminal block, The connecting member is a cylindrical portion to which the power line drawn out from the opening is connected; an extension portion that extends from the cylindrical portion so as to intersect with the axial direction of the cylindrical portion and is connected to the terminal block, The rotating electric machine according to claim 1 .

3. When viewed from a direction perpendicular to the axis of the cylindrical portion and the straight line along the extension portion, the angle formed by the axis of the cylindrical portion and the straight line along the extension portion is greater than 0 degrees and is not greater than 90 degrees. The rotating electric machine according to claim 2 .

4. the power line drawn out from the opening is curved and extends toward the other side in the axial direction of the rotating electric machine just before the terminal block, the cylindrical portion is connected to an end of the power line that extends in a curved manner, The extension portion extends from the cylindrical portion toward the terminal block, obliquely intersecting the axial direction of the cylindrical portion.

4. The rotating electric machine according to claim 2 or 3.

5. The stator coil is made of a rectangular wire.

3. The rotating electric machine according to claim 1 or 2.

6. a plurality of elastic members each having a recess formed along an outer periphery of the power line and arranged adjacent to each other so as to close the opening, the plurality of elastic members are attached to the opening with the recesses facing each other via the power lines; 3. The rotating electric machine according to claim 1 or 2.

7. When viewed from the axial direction of the rotary electric machine, the opening and each of the plurality of elastic members are formed in an arc shape along the circumferential direction of the rotary electric machine, Each of the plurality of elastic members has a plurality of recesses formed therein at intervals in the circumferential direction. The rotating electric machine according to claim 6.

8. When viewed from the axial direction of the rotating electric machine, a shape obtained by combining the recesses facing each other is elliptical. The rotating electric machine according to claim 6.

9. a holding member for holding the power line in the housing; the holding member holds the curved portion of the power line, 3. The rotating electric machine according to claim 1 or 2.

10. The power lines are provided in plurality, a restraining member disposed between the opening and the holding member as viewed in the axial direction of the rotating electric machine, the restraining member collectively restrains the plurality of power lines so that the plurality of power lines are spaced apart from each other relative to the cover portion of the rotating electric machine. The rotating electric machine according to claim 9.

11. A running body, an upper rotating body supported on the traveling body so as to be rotatable about a rotating shaft; a work machine operably supported on the upper rotating body; a rotating electric machine according to claim 1 or 2, which is configured as a swing motor for swinging the upper swing body relative to the traveling body; A work machine comprising:

Images