Rotating electric machines

Abstract

To provide a rotary electric machine that is easily maintained.SOLUTION: A rotary electric machine 10 comprises: a motor case 12; a lead wire 42 that supplies current to a coil 46 in the motor case 12; a connection terminal 44 that includes a first fixed portion 58 fixed to the lead wire 42 in one end, and a second fixed portion 84 fixed to a power supply cable 20 in the other end; and a terminal box 18 that houses the second fixed portion 84 of the connection terminal 44. The terminal box 18 can be separated with respect to the motor case 12. The motor case 12 includes an opening 54 that causes the first fixed portion 58 to expose to the outside. The connection terminal 44 can be separated from the motor case 12 together with the terminal box 18 when the fixing of the first fixed portion 58 is cancelled.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a rotating electric machine having a connection terminal for connecting a power cable. [Background technology]

[0002] A rotating electric machine has a connection terminal for connecting a power cable. The connection terminal is a metal fitting for connecting a lead wire extending from a coil that generates a driving magnetic field to the power cable. The connection terminal has a first fixing portion and a second fixing portion to ensure a stable electrical connection between the lead wire and the power cable. The first fixing portion fixes the connection terminal to the lead wire with a bolt or the like. The second fixing portion fixes the connection terminal to the wiring terminal of the power cable with a bolt or the like.

[0003] For example, as described in Patent Document 1, a plurality of connection terminals are covered with an insulating member. Furthermore, the insulating member and the connection terminals are housed inside a terminal box. The terminal box is fixed to a motor case that houses a rotor and a stator of a rotating electric machine. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4767319 Summary of the Invention [Problem to be solved by the invention]

[0005] Equipment that uses rotating electric machines requires maintenance at regular intervals. In particular, rotating electric machines that bear heavy loads require relatively frequent maintenance, in which the machine is removed from the equipment. Such maintenance requires that the power cable be disconnected from the rotating electric machine. The power cable is disconnected from the rotating electric machine by releasing the first fixing part or the second fixing part.

[0006] When the second fixing part is released, the connection terminal that has not yet reached the end of its life is removed, which requires unnecessary replacement of parts and increases maintenance costs. Therefore, during maintenance, it is often desirable to release only the first fixing part and leave the connection terminal connected to the power cable.

[0007] However, the terminal box in Patent Document 1 is formed integrally with the motor case that covers the rotating electric machine, and the first fixing part is disposed inside the case. Therefore, in order to release the fixing of the first fixing part, it is necessary to open the case of the rotating electric machine, which poses a problem of requiring extensive work.

[0008] An object of the present invention is to solve the above-mentioned problems. [Means for solving the problem]

[0009] One aspect of the following disclosure is a rotating electric machine including a motor case that houses a rotor and a stator, lead wires housed within the motor case that supply current to coils that generate a driving magnetic field, connection terminals having a first fixed portion at one end that is fixed to the lead wires and a second fixed portion at the other end that is fixed to a power cable, and a terminal box that houses the second fixed portion of the connection terminal, wherein the terminal box is separable from the motor case, the motor case has an opening that exposes the first fixed portion to the outside, and the connection terminal can be separated from the motor case together with the terminal box when the lead wires are released from the first fixed portion. [Effects of the Invention]

[0010] In the rotating electric machine of the above aspect, the connection terminals can be separated from the motor case together with the power cable by releasing the connection between the connection terminals and the lead wires without opening the motor case. Therefore, the rotating electric machine described above can be easily maintained. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a front view of a rotating electric machine according to a first embodiment. [Figure 2] FIG. 2 is a rear view of the rotating electric machine of FIG. [Figure 3] FIG. 3 is a plan view of the rotating electric machine of FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a partially enlarged view showing the state where the cover of the extension portion of FIG. 1 is removed. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 3 (and FIG. 4). [Figure 7] 7A is an enlarged cross-sectional view of the connection terminal, terminal box, lead wires, and extension portion of FIG. 4, and FIG. 7B is a cross-sectional view of the terminal box and extension portion of FIG. 7A separated from each other. [Figure 8] FIG. 8 is a schematic diagram of the onboard equipment. DETAILED DESCRIPTION OF THE INVENTION

[0012] As shown in FIG. 1 , a rotating electric machine 10 according to this embodiment has a cylindrical motor case 12, with a rotating shaft 14 protruding from one end in the axial direction. The rotating electric machine 10 is mounted as a main power source on on-board equipment 16, such as an electric aircraft, an electric vehicle, or various general-purpose equipment, as shown in FIG. 8 . Maintenance of the on-board equipment 16 is performed when the rotating electric machine 10 has been in use for a certain period of time or when the rotating electric machine 10 breaks down and is no longer rotating properly. This maintenance is, for example, replacement of the rotating electric machine 10, which involves removing the rotating electric machine 10. The rotating electric machine 10 of this embodiment facilitates removal from the on-board equipment 16.

[0013] The following describes a specific configuration of the rotating electric machine 10. In the following description, terms such as top, bottom, width direction, front, and back are used to describe the positions and connection relationships of the components of the rotating electric machine 10, and are not intended to limit the arrangement direction of the rotating electric machine 10.

[0014] As shown in Figures 1 to 3, the rotating electric machine 10 externally includes a motor case 12, a rotating shaft 14, and a terminal box 18. The rotating electric machine 10 is used with a power cable 20 connected to the terminal box 18 as shown in Figure 1. The power cable 20 is a component of the onboard equipment 16 shown in Figure 8, and supplies power from a power source 22 to the rotating electric machine 10. The power cable 20 is, for example, a three-phase cable, and has three wires 24 as shown in Figure 1. The power cable 20 has a connector 26 and wiring terminals 28 (see Figure 4) at its end. As shown in Figure 4, the wiring terminals 28 are attached to the ends of the three wires 24, respectively.

[0015] As shown in FIGS. 1 to 3, the motor case 12 has a cylindrical peripheral wall portion 30, a first wall 32 covering one end of the peripheral wall portion 30, and a second wall 34 covering the other end of the peripheral wall portion 30. The first wall 32 and the second wall 34 have planes that intersect perpendicularly with the central axis of the peripheral wall portion 30. The first wall 32 is located on the side (upper side) from which the rotating shaft portion 14 protrudes. The second wall 34 is located on the side (lower side) opposite to the side from which the rotating shaft portion 14 protrudes. As shown in FIGS. 2 and 4, an extension portion 36 and a terminal box 18 protrude from the second wall 34.

[0016] As shown in FIG. 4 , the rotating electric machine 10 includes a rotor 38, a stator 40, and lead wires 42 inside the motor case 12. The rotating electric machine 10 also includes a connection terminal 44 inside the terminal box 18. The rotor 38 is located toward the center of the motor case 12 and is supported by the rotating shaft 14. The rotor 38 applies rotational torque to the rotating shaft 14 and rotates integrally with the rotating shaft 14. The stator 40 is located on the outer periphery of the rotor 38 and surrounds the rotor 38. The stator 40 exerts a magnetic force on the rotor 38. Either the rotor 38 or the stator 40, or both, include a coil 46 that generates a driving magnetic field. In the illustrated example, the rotor 38 includes a permanent magnet 48, and the stator 40 includes the coil 46.

[0017] The lead wires 42 are current supply paths for the coils 46 and are connected to the ends of the coils 46. The lead wires 42 are provided in accordance with the number of phases of the rotating electric machine 10. For example, if the rotating electric machine 10 is a two-phase machine, two lead wires 42 are provided, and if it is a three-phase machine, three lead wires 42 are provided. In the example shown, the rotating electric machine 10 is a three-phase machine, and the rotating electric machine 10 is provided with three lead wires 42. The three lead wires 42 are arranged in a row in a direction perpendicular to the plane of the paper in FIG. 4.

[0018] 4, the lead wire 42 extends in the axial direction of the motor case 12, and its tip protrudes from the bottom surface 50 of the second wall 34. A connection terminal 44 is connected to a tip portion 42a of the lead wire 42 via a first fixing portion 58, which will be described later.

[0019] The motor case 12 has an extension portion 36 that surrounds the three lead wires 42. The extension portion 36 protrudes in the axial direction from a bottom surface 50 of the second wall 34. As shown in FIG. 3, the extension portion 36 extends long in the arrangement direction (width direction) of the three lead wires 42 when viewed in the axial direction. As shown in FIG. 4, the extension portion 36 has a cavity 52 therein that accommodates the lead wires 42. The extension portion 36 protects the lead wires 42 by surrounding the entire periphery of the lead wires 42 while being spaced laterally from the lead wires 42.

[0020] The extending portion 36 further has an opening 54 and a terminal insertion hole 56. The opening 54 is formed on the back surface 36a of the extending portion 36. The opening 54 is formed in a position where a first fixing portion 58, which fixes the lead wire 42 and the connection terminal 44, can be exposed to the outside. The opening 54 has dimensions that allow the first fixing portion 58 to fix or release the lead wire 42 and the connection terminal 44. For example, if the first fixing portion 58 has a fixing structure using a bolt 58c, the opening 54 has a diameter that allows the bolt 58c and a fastening tool therefor to pass through.

[0021] As shown in FIG. 2, three openings 54 are provided, which is the same number as the lead wires 42. As shown in FIG. 4, the extension portion 36 has a lid 62 that closes the openings 54. The lid 62 is fixed to the extension portion 36 with a setscrew 64 (see FIG. 2). The lid 62 prevents dust and water from entering the openings 54. The lid 62 can be removed from the openings 54 by removing the setscrew 64.

[0022] The terminal insertion hole 56 is formed on the front surface 36b side of the extending portion 36. The connection terminal 44 is inserted into the terminal insertion hole 56. A portion of the connection terminal 44 is accommodated inside the extending portion 36 through the terminal insertion hole 56. As shown in FIG. 6, the terminal insertion hole 56 is formed in a circular shape when viewed from the front.

[0023] The number of terminal insertion holes 56 provided is the same as the number of lead wires 42 (for example, three). The terminal insertion holes 56 are arranged side by side in the width direction of the extension portion 36. The central terminal insertion hole 56 is farther away from the bottom surface 50 of the motor case 12 than the terminal insertion holes 56 on both ends, thereby forming a gap between the terminal insertion hole 56 and the bottom surface 50.

[0024] As shown in Fig. 2, the extension portion 36 has a box fixing structure 70 that fixes the terminal box 18 (see Fig. 4). The box fixing structure 70 has a plurality of boss holes 72 provided in the terminal box 18 and box fixing screws 74 that are inserted into the boss holes 72. The box fixing screws 74 are inserted from the extension portion 36 into the boss holes 72 and screwed into the boss holes 72 of the terminal box 18 (see Fig. 4), thereby fixing the terminal box 18 and the extension portion 36 together.

[0025] As shown in FIGS. 4 and 6, the terminal box 18 has a box body 76, terminal accommodating chambers 78, a terminal fixing portion 80, and a connector fixing portion 82. The box body 76 is a cylindrical member and, as shown in FIG. 3, is formed in a substantially rectangular shape when viewed from above. As shown in FIG. 7A, the box body 76 is connected to the side portion of the extension portion 36 on the front surface 36b side. A portion of the central side of the box body 76 overlaps with the projected range of the motor case 12 in the axial direction. In addition, both side portions of the box body 76 protrude outside the projected range of the motor case 12 in the axial direction.

[0026] The terminal accommodating chamber 78 accommodates a portion of the front side of the connection terminal 44 and the second fixing portion 84. The connection terminal 44 is formed inside the box body 76 and penetrates through the rear surface 76a and front surface 76b of the box body 76. The rear side of the terminal accommodating chamber 78 is closed by the extending portion 36. The terminal accommodating chamber 78 opens at the front surface 76b of the box body 76 to form a cable insertion opening 78a. The cable insertion opening 78a receives the wire 24 extending from the power cable 20 and the wire terminal 28.

[0027] As shown in FIG. 6 , the terminal fixing portions 80 are located on both widthwise sides of the box body 76. The terminal fixing portions 80 have terminal fixing screws 86 and boss holes 88. The terminal fixing screws 86 extend in the axial direction and pass through the sides of the connection terminals 44. The terminal fixing screws 86 screw into the boss holes 88 to fix the connection terminals 44 to the terminal box 18. As shown in FIG. 3 , the terminal fixing portions 80 are located outside the projected range of the motor case 12 in the axial direction. Therefore, the rotating electric machine 10 can remove the connection terminals 44 together with the power cable 20 without removing the terminal box 18 from the motor case 12.

[0028] As shown in Fig. 4, the connector fixing portion 82 has a boss hole 90 formed on the front side of the terminal box 18. As shown in Fig. 7A, the boss hole 90 is formed in a bulge portion 90a that bulges outward from the peripheral edge of the terminal box 18. As shown in Fig. 1, a plurality of boss holes 90 (five in the illustrated example) are formed around the periphery of the box main body 76, and a connector fixing screw 92 is inserted into each boss hole 90. The connector 26 attached to the power cable 20 is fixed to the front side of the terminal box 18 by the connector fixing screws 92 and the boss holes 90.

[0029] As shown in FIGS. 6 , 7A, and 7B, the connection terminal 44 has a plurality of conductor portions 94 and an insulating member 96. The conductor portions 94 are formed of a highly conductive metal such as copper or aluminum. The connection terminal 44 has three conductor portions 94, the same number as the lead wires 42. Each conductor portion 94 is covered with an insulating member 96 and insulated from one another. One end of each conductor portion 94 is housed in the extension portion 36, and the other end is housed in the terminal accommodating chamber 78 (terminal box 18). Each conductor portion 94 has a first fixing portion 58 at one end and a second fixing portion 84 at the other end. The first fixing portion 58 fixes the conductor portion 94 to the lead wires 42, and the second fixing portion 84 fixes the conductor portion 94 to the wiring terminal 28 of the power cable 20.

[0030] The first fixing portion 58 is composed of, for example, a first connection surface 58a, a bolt hole 58b, and a bolt 58c. The first connection surface 58a is an end face of the conductor portion 94 and is a surface parallel to the axial direction. The first connection surface 58a is in surface contact with the lead wire 42. The bolt hole 58b is a hole extending in a direction perpendicular to the first connection surface 58a. The bolt hole 58b has a threaded inner periphery. The bolt 58c is screwed into the bolt hole 58b to fix the lead wire 42 to the first connection surface 58a.

[0031] The second fixing portion 84 can be composed of, for example, a second connection surface 84a, a bolt hole 84b, and a bolt 84c. The second connection surface 84a is the bottom surface of the conductor portion 94 and is a surface perpendicular to the first connection surface 58a. The second connection surface 84a is in surface contact with the wiring terminal 28 of the power cable 20. The bolt hole 84b of the second fixing portion 84 is a hole that extends in a direction perpendicular to the second connection surface 84a. The bolt hole 84b has a threaded inner surface. The bolt 84c of the second fixing portion 84 screws into the bolt hole 84b to fix the wiring terminal 28 to the bottom surface of the conductor portion 94.

[0032] The first fixing portion 58 and the second fixing portion 84 are not limited to being fixed by bolts, and various fixing methods such as fitting, crimping, or soldering may be used.

[0033] The conductor portion 94 has a bent portion 98. The bent portion 98 is bent so that the position of the second fixing portion 84 is closer to the second wall 34 of the motor case 12 than the position of the first fixing portion 58. The bent portion 98 makes it possible to arrange the second fixing portion 84 of the conductor portion 94 in a position closer to the motor case 12. The bent portion 98 prevents the conductor portion 94 from protruding downward, making it possible to reduce the size of the terminal box 18.

[0034] As shown in Fig. 6, the three conductor portions 94 are arranged side by side in the width direction. Of the three conductor portions 94, the central conductor portion 94 is arranged farther from the bottom surface 50 of the second wall 34 than the other conductor portions 94. Therefore, the connection terminal 44 in the center in the width direction is located lower than the other adjacent connection terminals 44. The upper end wall 18a of the terminal box 18 is recessed in the center in the width direction. A bulge portion 90a (boss) is formed on the upper end wall 18a in the recessed portion.

[0035] As shown in Figures 7A and 7B, the insulating member 96 covers the periphery of the conductor portion 94, thereby electrically insulating the conductor portion 94 from surrounding components. The insulating member 96 exposes the conductor portion 94 at the first fixing portion 58 and the second fixing portion 84. As shown in Figure 6, the insulating member 96 extends in the width direction and mechanically connects the multiple conductor portions 94. The widthwise ends of the insulating member 96 extend to the terminal fixing portions 80 of the terminal box 18. The insulating member 96 is fixed to the terminal box 18 at the terminal fixing portions 80 by screws.

[0036] 7A, the insulating member 96 has a lower edge 96a that extends from the end on the first fixed portion 58 side toward the rear surface. The lower edge 96a extends toward the rear surface beyond the contact surface (the end surface of the conductor portion 94) between the lead wire 42 and the conductor portion 94. The lower edge 96a forms a wall that covers the connection portion between the lead wire 42 and the conductor portion 94 and the lower portion of the bolt 58c. This lower edge 96a increases the edge surface distance between the extension portion 36 and the first fixed portion 58 near the first fixed portion 58, thereby improving the insulation of the first fixed portion 58.

[0037] The rotating electric machine 10 of this embodiment is configured as described above. The method for removing the rotating electric machine 10 while the power cable 20 and the connection terminal 44 remain connected is as follows.

[0038] First, the lid 62 of the opening 54 shown in Fig. 2 is removed. Prior to removing the lid 62, the setscrew 64 that secures the lid 62 to the extension portion 36 is removed. Thereafter, the lid 62 is removed, and the bolt 58c of the first fixing portion 58 is exposed in the opening 54, as shown in Fig. 5. Next, the bolt 58c is removed through the opening 54. When the three bolts 58c are removed, the connection terminal 44 and the three lead wires 42 are released from their connection.

[0039] Next, the plurality of box fixing screws 74 located on the periphery of the extension portion 36 in Figure 5 are removed. When the five box fixing screws 74 are removed, the terminal box 18 and the extension portion 36 are released from the connection, and the terminal box 18 can be removed from the motor case 12.

[0040] Thereafter, the connection terminal 44 is pulled out from the terminal insertion hole 56 of the extension portion 36. The connection terminal 44 is pulled out by moving the terminal box 18 to the front side. The connection terminal 44 is separated from the motor case 12 while still connected to the power cable 20 through the second fixing portion 84. Thereafter, the rotating electric machine 10 is removed from the power cable 20. The rotating electric machine 10 can be installed by performing the above steps in reverse order.

[0041] 8, the rotating electric machine 10 of this embodiment is suitable for maintenance work on on-board equipment 16 that is mounted with the rotating shaft portion 14 of the rotating electric machine 10 protruding upward. That is, the on-board equipment 16 has excellent workability because the power cable 20 and the connection terminal 44 can be removed from the motor case 12 by working from below the rotating electric machine 10.

[0042] (Modification 1 of the embodiment) The rotating electric machine 10 of this embodiment is not limited to the above-described embodiment and can take various forms. For example, in the rotating electric machine 10, the protruding portions of the lead wires 42 are not limited to being located on the second wall 34, but may be located on the peripheral wall portion 30 or the first wall 32. In this case, the extension portion 36 and the terminal box 18 are provided on the peripheral wall portion 30 or the first wall 32.

[0043] (Modification 2 of the embodiment) In the rotating electric machine 10 of this embodiment, the lead wires 42 may be entirely contained within the first wall 32, the second wall 34, and the peripheral wall 30 of the motor case 12. In this case, the connection terminals 44 protrude from the first wall 32, the second wall 34, or the peripheral wall 30. The first fixing portions 58 fix the lead wires 42 and the connection terminals 44 within the first wall 32, the second wall 34, and the peripheral wall 30. The terminal box 18 is detachably connected to the first wall 32, the second wall 34, or the peripheral wall 30. The opening 54 of the motor case 12 is formed in the first wall 32, the second wall 34, or the peripheral wall 30 at a position that allows the first fixing portions 58 to be exposed. In this case, the rotating electric machine 10 may have a lid 62 that closes the opening 54, or the terminal box 18 may also serve as the lid 62 for the opening 54.

[0044] The above disclosure can be summarized as follows:

[0045] One aspect of the above is a rotating electric machine (10) comprising a motor case (12) that houses a rotor (38) and a stator (40), lead wires (42) that are housed within the motor case and supply current to coils (46) that generate a driving magnetic field, a connection terminal (44) that has a first fixed portion (58) fixed to the lead wire at one end and a second fixed portion (84) fixed to a power cable (20) at the other end, and a terminal box (18) that houses the second fixed portion of the connection terminal, wherein the terminal box is separable from the motor case, the motor case has an opening (54) that exposes the first fixed portion to the outside, and the connection terminal can be separated from the motor case together with the terminal box when the lead wire is released from its fixed position to the first fixed portion.

[0046] In the rotating electric machine, the connection terminals can be separated from the motor case together with the terminal box by disconnecting the lead wires from the connection terminals while maintaining the connection between the connection terminals and the power cable. Therefore, during maintenance, the rotating electric machine can be removed alone, leaving the connection terminals and the terminal box on the mounted device, improving maintainability of the rotating electric machine.

[0047] In the above rotating electric machine, when the axial direction of the motor case is aligned vertically, the connection terminal and the terminal box may be located on the bottom surface 50 of the motor case. When this rotating electric machine is mounted on an on-board device with the rotating shaft oriented vertically, the rotating electric machine can be removed from below, providing excellent workability.

[0048] In the rotating electric machine described above, the terminal box may be disposed so as to overlap at least a portion of the motor case in a projected area in the axial direction, thereby preventing the terminal box from protruding laterally and preventing an increase in the radial size of the rotating electric machine.

[0049] In the rotating electric machine described above, the lead wires may protrude downward from the bottom surface, and the motor case may include an extension portion 36 that surrounds the lead wires protruding downward from the bottom surface. This rotating electric machine can protect the lead wires when it is attached to or detached from an on-board device.

[0050] In the rotating electric machine, the terminal box may be connected to a side surface of the extension portion of the motor case, and the rotating electric machine can protect the connection terminals by forming an enclosure around the connection terminals while changing the connection direction of the power cable relative to the extension direction of the lead wires.

[0051] In the above rotating electric machine, the connection terminal may have a bent portion 98 that is bent so that the position of the second fixing portion is closer to the motor case relative to the position of the first fixing portion. In this rotating electric machine, the fixed portion between the cable and the connection terminal can be brought closer to the second wall (motor case) relative to the fixed portion between the lead wire and the connection terminal, thereby preventing the connection terminal from protruding from the bottom surface.

[0052] In the rotating electric machine described above, the power cable may be a three-phase cable, the terminal box may have three of the connection terminals, the second fixing portions of the three connection terminals may be arranged side by side in the width direction of the terminal box, and adjacent second fixing portions may have different heights in the vertical direction. By varying the heights of the second fixing portions, this rotating electric machine can secure free space in the terminal box and increase the degree of freedom in the layout of various fixing structures.

[0053] In the rotating electric machine described above, of the three connection terminals, the connection terminal located in the middle in the width direction may be farther from the bottom surface of the motor case than the other connection terminals, and the terminal box may have an upper end wall 18a that is recessed in the center in the width direction and has a boss on the upper end wall in the center in the width direction. In this rotating electric machine, by providing a boss in the empty space of the terminal box, the upper protrusion of the terminal box can be made smaller.

[0054] In the above rotating electric machine, the connection terminal may have a conductor portion 94 and an insulating member 96 covering the conductor portion, and the insulating member may have a lower edge portion 96a extending beyond the abutment surface between the lead wire and the conductor portion so as to cover the lower side of the lead wire. In this rotating electric machine, the lower edge portion is extended so as to exceed the abutment surface between the conductor portion and the lead wire on the lead wire side of the connection terminal, thereby ensuring insulation performance between the extension portion, the terminal box, and the second fixed portion.

[0055] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0056] 10... Rotating electric machine 12... Motor case 14...Rotating shaft portion 18...Terminal box 20...Power cable 36...Extension part 42...Lead wire 44...Connection terminal 54...Opening part 58...First fixed part 84...Second fixed part 98...Bending part

Claims

1. a motor case that houses a rotor and a stator; a lead wire housed in the motor case for supplying current to a coil that generates a driving magnetic field; a connection terminal having a first fixing portion at one end fixed to the lead wire and a second fixing portion at the other end fixed to a power cable; a terminal box that houses the second fixed portion of the connection terminal, the terminal box is separable from the motor case, the motor case has an opening that exposes the first fixing portion to the outside, When the lead wire is released from the first fixing portion, the connection terminal can be separated from the motor case together with the terminal box. the connection terminal has a bent portion that is bent so that the position of the second fixing portion is closer to the motor case than the position of the first fixing portion, Rotating electric motor.

2. 2. The rotating electric machine according to claim 1, wherein when the axial direction of the motor case is aligned vertically, the connection terminals and the terminal box are located on the bottom surface of the motor case. Rotating electric motor.

3. 3. The rotating electric machine according to claim 2, wherein the terminal box is disposed so as to overlap at least a portion of the projected area of ​​the motor case in the axial direction. Rotating electric motor.

4. 3. The rotating electric machine according to claim 2, wherein the lead wires protrude downward from the bottom surface, and the motor case includes an extension portion surrounding the lead wires protruding downward from the bottom surface. Rotating electric motor.

5. 5. The rotating electric machine according to claim 4, wherein the terminal box is connected to a side surface of the extension portion of the motor case. Rotating electric motor.

6. 2. A rotating electric machine according to claim 1, wherein the power cable is a three-phase cable, the terminal box has three of the connection terminals, the second fixing portions of the three connection terminals are arranged side by side in the width direction in the terminal box, and the second fixing portions adjacent to each other have different heights in the up-down direction. Rotating electric motor.

7. 7. The rotating electric machine according to claim 6, when the axial direction of the motor case is aligned vertically, the connection terminals and the terminal box are located on the bottom surface of the motor case, Among the three connection terminals, the connection terminal located in the middle in the width direction is farther from the bottom surface of the motor case than the other connection terminals, and the terminal box has an upper end wall that is recessed in the middle in the width direction and has a boss on the upper end wall in the middle in the width direction. Rotating electric motor.

8. 8. The rotating electric machine according to claim 1, wherein the connection terminal has a conductor portion and an insulating member covering the conductor portion, the insulating member has a lower edge portion that extends beyond the contact surface between the lead wire and the conductor portion so as to cover the lower portion of the lead wire. Rotating electric motor.

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