motor

Abstract

The connector part will be made smaller. [Solution] The device comprises a rotor, a first stator 20A and a second stator 20B arranged on either side of the rotor in the axial direction, a first busbar 31A connected to the first stator, a second busbar 31B connected to the second stator, a first connector portion 40A fixed to the first busbar, a second connector portion 40B fixed to the second busbar, a housing 60, a first cable 50A connected to the first connector portion, and a second cable 50B connected to the second connector portion. The housing is provided with a first hole 60a extending from the first connector portion toward one axial direction, and a second hole 60b extending from the second connector portion toward one axial direction. The first cable is connected to the first connector portion from one axial direction through the first hole. The second cable is connected to the second connector portion from one axial direction through the first hole.

Description

Technical Field

[0001] The present invention relates to a motor.

Background Art

[0002] In recent years, development of motors for driving propellers of aircraft such as electric vertical take-off and landing aircraft has been underway (for example, Patent Document 1). Such a motor is disposed directly below the propeller. Therefore, in order not to obstruct the air flow by the propeller, it is required to reduce the axial projected area of the motor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such an aircraft motor, a cable connected to a control unit may be connected. In this case, there is a risk that the cable or its connection part may protrude with respect to the outer shape of the motor and obstruct the air flow by the propeller.

[0005] The present invention has been made in view of such problems, and one of its objects is to provide a motor in which the connector portion to which the cable is connected is reduced in size.

Means for Solving the Problems

[0006] One embodiment of the motor of the present invention comprises a rotor rotatable about a central axis, a first stator axially opposite to the rotor and located on one axial side of the rotor, a second stator axially opposite to the rotor and located on the other axial side of the rotor, a first busbar connected to the first stator, a second busbar connected to the second stator, a first connector portion fixed to the first busbar, a second connector portion fixed to the second busbar, a housing housing the rotor, the first stator, the second stator, the first busbar, and the second busbar, a first cable connected to the first connector portion and led out to the outside of the housing, and a second cable connected to the second connector portion and led out to the outside of the housing. The housing is provided with a first hole extending axially from the first connector portion and a second hole extending axially from the second connector portion. The first cable is connected to the first connector portion from one axial side through the first hole. The second cable is connected to the second connector portion from one axial side through the second hole. The second connector portion is located radially outward of the second stator. The second hole extends from the second connector portion, through the radially outward sides of the second stator and the first stator, to one axial side of the housing.

[0007] One embodiment of the motor of the present invention comprises a rotor rotatable about a central axis, a first stator axially opposite to the rotor and located on one side of the rotor in the axial direction, a first busbar connected to the first stator, a housing housing the rotor, the first stator, and the first busbar, and a first cable connected to the first busbar and leading out of the housing. The first busbar has a plate-shaped first connecting end with its thickness oriented in the axial direction. The first cable has a first cable body extending along the axial direction and a plate-shaped first terminal plate located at the tip of the first cable and extending along a plane perpendicular to the axial direction. The housing is provided with a first opening that exposes the first connecting end to one side in the axial direction. The first terminal plate is fastened to the first connecting end from one side in the axial direction through the first opening. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to provide a motor in which the connector portion to which the cable is connected has been miniaturized. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a cross-sectional view of the motor according to the first embodiment. [Figure 2] Figure 2 is a perspective view of the busbar unit and insulator of the first embodiment. [Figure 3] Figure 3 is an enlarged view of region III shown in Figure 1. [Figure 4] Figure 4 is an enlarged view of region IV shown in Figure 1. [Figure 5] Figure 5 is a cross-sectional view showing the connection portions of multiple first busbars, multiple first connectors, and multiple first cables of the first embodiment. [Figure 6] Figure 6 is a partial cross-sectional view of the motor according to the second embodiment. [Figure 7] Figure 7 is a partial cross-sectional view of the motor according to the second embodiment. [Modes for carrying out the invention]

[0010] Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiments and can be arbitrarily modified within the scope of the technical idea of ​​the present invention. The Z-axis is shown in each figure as appropriate. The Z-axis is a hypothetical axis parallel to the central axis J, which will be described later. Furthermore, the Z-axis is in the vertical direction, with the positive side being the "up" and the negative side being the "down". However, the orientation of the motor in the vertical direction in this specification is merely an example for illustrative purposes and does not limit the orientation of the motor during use.

[0011] <First Embodiment> Figure 1 is a cross-sectional view of the motor 100 according to the first embodiment. The motor 100 in this embodiment is a motor provided in the propulsion system 1000. The propulsion system 1000 is mounted on, for example, an aircraft. The propulsion system 1000 generates thrust for the aircraft to move. The propulsion system 1000 comprises the motor 100 and the propeller 1100.

[0012] The propeller 1100 is attached to the shaft 8 of the motor 100 and rotated by the motor 100 around the central axis J. The propeller 1100 has a base 1110 fixed to the shaft 8 and a plurality of blades 1120 connected to the base 1110. The plurality of blades 1120 extend radially and are spaced apart in the circumferential direction.

[0013] The motor 100 of this embodiment includes a shaft 8, a pair of bearings 9A and 9B, a rotor 10, a pair of stators 20, a pair of busbar units 30, a plurality of connector sections 40, a pair of insulators 81 and 82, a housing 60, a bearing cover 90, a lower cover 99, a plurality of cables 50, and two cable covers 70.

[0014] The motor 100 of this embodiment is an axial-gap motor of the double-stator single-rotor type. Therefore, the stator 20 of this embodiment faces the rotor 10 axially with a gap therebetween. The pair of stators 20 are arranged on both axial sides of the rotor 10. Also, the motor 100 of this embodiment is a three-phase brushless motor. However, the number of phases of the drive power source may be more than three. The total number may also be two phases. Hereinafter, each part of the motor 100 will be described in detail.

[0015] <Rotor> The rotor 10 is rotatable about the central axis J. In this specification, the central axis J is a virtual line and is assumed to extend in the vertical direction. In the following description, the axial direction of the central axis J will simply be referred to as the "axial direction", the direction corresponding to the lower side in the axial direction will be referred to as the "one side in the axial direction", and the direction corresponding to the upper side may be referred to as the "other side in the axial direction". Furthermore, in the following description, the radial direction centered on the central axis J may simply be referred to as the "radial direction", and the circumferential direction centered on the central axis J may simply be referred to as the "circumferential direction".

[0016] The rotor 10 is disposed between the pair of stators 20. The rotor 10 of this embodiment has a holder 11 and a plurality of rotor magnets 12. Note that the configuration of the rotor 10 of this embodiment is an example and is not limited to this embodiment.

[0017] The holder 11 is substantially annular about the central axis J. The holder 11 is provided with a central hole 11h penetrating axially. The central hole 11h is substantially circular about the central axis J. Also, the holder 11 has a plurality of magnet accommodating portions 11a. The magnet accommodating portion 11a is a hole penetrating the holder 11 axially. The plurality of magnet accommodating portions 11a are arranged at equal intervals in the circumferential direction.

[0018] The rotor magnets 12 are accommodated inside the magnet accommodation parts 11a different from each other and fixed to the holder 11. The plurality of rotor magnets 12 are arranged at equal intervals in the circumferential direction. The rotor magnets 12 face the stator 20 in the axial direction. Each rotor magnet 12 has a magnetic pole whose magnetization direction faces the axial direction. In this example, the directions of the magnetic poles of the rotor magnets 12 arranged adjacent to each other in the circumferential direction are opposite to each other. However, a Halbach array in which magnets arranged with the direction of the magnetic poles shifted from the axial direction are mixed can also be adopted as the arrangement of the rotor magnets.

[0019] <Shaft> The shaft 8 is arranged with its central axis coinciding with the central axis line J and extends in the axial direction. The shaft 8 is fixed to the inner peripheral surface of the central hole 11h of the rotor 10. The shaft 8 rotates around the central axis line J together with the rotor 10. The shaft 8 is rotatably supported with respect to the housing 60 by a pair of bearings 9A and 9B. One bearing 9A is located below (-Z) the rotor 10. The other bearing 9B is located above (+Z) the rotor 10. A propeller 1,100 is fixed to the upper end portion of the shaft 8. Further, a bearing cover 90 is fixed between the outer peripheral surface of the shaft 8, the region fixed to the propeller 1,100, and the region supported by the bearing 9B.

[0020] <Stator> The stator 20 is annular when viewed from the axial direction and surrounds the central axis line J. Of the pair of stators 20, one is located below (-Z) the rotor 10 and the other is located above (+Z) the rotor 10. According to the present embodiment, by sandwiching the rotor 10 with the pair of stators and forming rotational magnetic fluxes respectively, high torque can be generated in the rotor 10.

[0021] In the following description, when distinguishing between the pair of stators 20, the one located on the lower side will be called the first stator 20A, and the other located on the upper side will be called the second stator 20B. That is, the motor 100 comprises a first stator 20A located on the lower side (-Z) of the rotor 10, and a second stator 20B located on the upper side (+Z) of the rotor 10. The first stator 20A and the second stator 20B have the same structure. Furthermore, the first stator 20A and the second stator 20B are arranged inverted.

[0022] Each stator 20 comprises a stator core 21 and a plurality of coils 25. The stator core 21 is substantially annular in shape with a central axis J. A shaft 8 is positioned radially inward of the stator core 21. The stator core 21 has a back yoke portion 22 and a teeth portion 23. The back yoke portion 22 is disc-shaped with a central axis J. The teeth portion 23 is columnar in shape, protruding from the back yoke portion 22 toward the rotor 10. The plurality of teeth portions 23 are arranged at equal intervals along the circumferential direction.

[0023] The coil 25 is attached to the teeth portion 23 via an insulating member (e.g., insulating paper) not shown in the figure. The coil 25 is composed of, for example, a coil wire wound around the outer surface of the teeth portion 23. In this embodiment, the multiple coils 25 are classified into three phase coils 25 corresponding to the U phase, V phase, and W phase. AC currents with a phase shift of 120° are passed through each of the three phase coils 25.

[0024] <Bus bar unit> Figure 2 is a perspective view of the busbar unit 30 and insulator 81 of this embodiment. As shown in Figure 2, the busbar unit 30 has an annular portion 30a surrounding the central axis J, and a protruding portion 30b projecting radially outward from the annular portion 30a.

[0025] The busbar unit 30 includes a plurality of busbars 31 and a busbar holder 35. The busbar holder 35 is made of an insulating resin material. The busbar holder 35 supports the plurality of busbars 31. In this embodiment, the busbar holder 35 has the plurality of busbars 31 embedded in it. That is, the busbar holder 35 is formed by insert molding with the plurality of busbars 31 arranged inside.

[0026] The busbar holder 35 has an annular support portion 35a that supports the busbar 31 at the annular portion 30a, and a protruding support portion 35b that supports the busbar 31 at the protruding portion 30b. The annular support portion 35a is an annular shape centered on the central axis J. The protruding support portion 35b protrudes radially outward from the outer circumferential surface of the annular support portion 35a. At least a portion of all busbars 31 are embedded in the annular support portion 35a, and some busbars 31 are further embedded in the protruding support portion 35b.

[0027] As shown in Figure 2, the multiple busbars 31 include multiple phase busbars 31U, 31V, and 31W, one neutral point busbar 31D, and multiple inter-coil busbars 31E. Each of the multiple busbars 31 has one or more coil connection points 31c. Each of the multiple busbars 31 is connected to the coil 25 at the coil connection point 31c. That is, the multiple busbars are connected to the stator 20. The neutral point busbar 31D connects coils 25 of different phases. The neutral point busbar 31D constitutes the neutral point of a star connection. Each inter-coil busbar 31E connects two coils 25 adjacent to each other in the circumferential direction in series. In this embodiment, the case in which multiple coils 25 are connected to each other by multiple busbars 31 to constitute a star connection is described. However, the multiple busbars 31 may be configured to delta connect the multiple coils 25.

[0028] The busbar unit 30 of this embodiment is provided with three phase busbars 31U, 31V, and 31W. The three phase busbars 31U, 31V, and 31W correspond to the U phase, V phase, and W phase, respectively, and currents with different phases flow through them. The phase busbars 31U, 31V, and 31W are connected to an external power supply via a connector section 40 and cable 50, which will be described later.

[0029] Parts of the pair busbars 31U, 31V, and 31W are embedded in the protruding support portion 35b. Furthermore, the pair busbars 31U, 31V, and 31W have connecting ends 31a that protrude radially outward from the radially outer ends of the protruding support portion 35b. That is, the pair busbars 31U, 31V, and 31W are exposed from the busbar holder 35 at their connecting ends 31a. The connecting ends 31a of the three pair busbars 31U, 31V, and 31W are arranged side-by-side along the circumferential direction. Each connecting end 31a is plate-shaped with its thickness oriented axially. Through holes 31h are provided in the connecting ends 31a. The three connecting ends 31a are housed in the insulator 81.

[0030] As shown in Figure 1, a pair of busbar units 30 are each connected to different stators 20. One of the pair of busbar units 30 is located on the lower side (-Z) of the rotor 10 and is connected to the first stator 20A. The other of the pair of busbar units 30 is located on the upper side (+Z) of the rotor 10 and is connected to the second stator 20B. In the following description, when distinguishing between the pair of busbar units 30, the one located on the lower side will be called the first busbar unit 30A, and the other one located on the upper side will be called the second busbar unit 30B. Furthermore, the multiple busbars 31 of the first busbar unit 30A will be called the first busbar 31A, and the multiple busbars 31 of the second busbar unit 30B will be called the second busbar 31B. That is, the motor 100 includes, as busbars 31, the first busbar 31A connected to the first stator 20A, and the second busbar 31B connected to the second stator 20B. The first busbar unit 30A and the second busbar unit 30B have the same structure. The first busbar unit 30A and the second busbar unit 30B are arranged inverted vertically and horizontally. Furthermore, in the following description, the axis extending axially through the center of the through-hole 31h of the first busbar 31A is called the first axis J1, and the axis extending axially through the center of the through-hole 31h of the second busbar 31B is called the second axis J2.

[0031] <Connector, cable, insulator> The connector section 40 is fixed to the connection ends 31a of the first busbar 31A and the second busbar 31B, respectively. A cable 50 is also connected to each of the connector sections 40. The connector section 40 is made of a metal material with excellent conductivity, such as a copper alloy.

[0032] In the following description, the connector portion 40 fixed to the first bus bar 31A will be referred to as the first connector portion 40A, and the connector portion 40 fixed to the second bus bar 31B will be referred to as the second connector portion 40B. The connection ends 31a of the three first bus bars 31A are arranged side by side along the radial direction. Therefore, the multiple first connector portions 40A are arranged side by side along the radial direction. Similarly, the connection ends 31a of the three second bus bars 31B are arranged side by side along the radial direction. Therefore, the multiple second connector portions 40B are arranged side by side along the radial direction.

[0033] Figure 3 is an enlarged view of area III shown in Figure 1. Figure 3 shows the connection between the first busbar 31A, the first connector section 40A, and the cable 50.

[0034] The first connector portion 40A is fixed to the connecting end 31a of the first bus bar 31A. The first connector portion 40A has a cylindrical portion 41 and a flange portion 42. The cylindrical portion 41 is inserted into the through hole 31h of the first bus bar 31A. The cylindrical portion 41 is cylindrical with the first axis J1 as its center. The flange portion 42 protrudes radially outward from the lower (-Z) end of the cylindrical portion 41 relative to the first axis J1.

[0035] The cylindrical portion 41 has a female thread portion 41a provided on its inner circumferential surface and a crimping portion 41b that bulges radially outward with respect to the first axis J1. The female thread portion 41a of the first connector portion 40A is located above (+Z) the crimping portion 41b.

[0036] The crimping portion 41b is provided around the entire circumference of the outer surface of the cylindrical portion 41, centered on the first axis J1. The crimping portion 41b has a first crimping portion 41ba, a second crimping portion 41bb, and a third crimping portion 41bc. The first crimping portion 41ba is an annular shape that protrudes radially outward from the outer surface of the cylindrical portion 41. The second crimping portion 41bb is located axially closer to the connecting end 31a (i.e., lower) than the first crimping portion 41ba. The second crimping portion 41bb is an annular shape that protrudes radially outward from the outer surface of the cylindrical portion 41. The third crimping portion 41bc connects the radially outward ends of the first crimping portion 41ba and the second crimping portion 41bb. The connecting end 31a is sandwiched between the second crimping portion 41bb and the flange portion 42. In other words, the crimped portion 41b sandwiches the connecting end portion 31a between itself and the flange portion 42.

[0037] In this embodiment, the crimped portion 41b is formed by inserting the cylindrical portion 41 into the through hole 31h and then plastically deforming the cylindrical portion 41. In other words, the crimped portion is formed by crimping. The crimped portion 41b and the flange portion 42 clamp the connecting end 31a in the axial direction, thereby fixing the first connector portion 40A to the first busbar 31A and electrically connecting it to the first busbar 31A.

[0038] The cable 50 is connected to the connector section 40. In the following description, the cable 50 connected to the first connector section 40A will be referred to as the first cable 50A. The first cable 50A has a first terminal 51 and a cable body 53.

[0039] The first terminal 51 is provided at the tip of the first cable 50A. The first terminal 51 is screw-shaped and is fastened into the female thread portion 41a of the first connector portion 40A. The first terminal 51 has a male thread portion 51a, a terminal flange portion 51b, and a terminal connection portion 51c.

[0040] The male threaded portion 51a is inserted into the female threaded portion 41a. The terminal flange portion 51b protrudes radially outward from the lower end of the male threaded portion 51a. The terminal flange portion 51b contacts the flange portion 42 of the connector portion 40 when the male threaded portion 51a is inserted into or screwed into the female threaded portion 41a. The terminal connection portion 51c is located below (-Z) the female threaded portion 41a and the terminal flange portion 51b. The terminal connection portion 51c is connected to the cable body 53.

[0041] The cable body 53 has a copper wire portion 53a and a covering portion 53b surrounding the copper wire portion 53a. The copper wire portion 53a is fixed to the first terminal 51 and electrically connected. In this embodiment, the copper wire portion 53a is connected to the first terminal 51 by being sandwiched in a crimped terminal connection portion 51c. Other methods of connecting the first terminal 51 and the copper wire portion 53a may include soldering or welding.

[0042] A conductive material 49 is interposed between the female thread portion 41a of the first connector portion 40A and the male thread portion 51a of the first terminal 51. The conductive material 49 is, for example, a conductive tape or a conductive paste. If the conductive material 49 is a conductive tape, the tape is wrapped around the outer surface of the male thread portion 51a and inserted into the female thread portion 41a together with the male thread portion 51a. If the conductive material 49 is a conductive paste, the paste is applied to the outer surface of the male thread portion 51a and inserted into the female thread portion 41a together with the male thread portion 51a.

[0043] Figure 4 is an enlarged view of area IV shown in Figure 1. Figure 4 shows the connection between the second busbar 31B and the cable 50.

[0044] The second connector portion 40B is fixed to the connecting end 31a of the second bus bar 31B. The second connector portion 40B, like the first connector portion 40A (see Figure 3), has a cylindrical portion 41 and a flange portion 42, and is positioned by inverting the first connector portion 40A vertically. The cylindrical portion 41 is inserted into the through hole 31h of the second bus bar 31B. The cylindrical portion 41 is cylindrical with the second axis J2 as its center. The flange portion 42 protrudes radially outward from the upper (+Z) end of the cylindrical portion 41 relative to the second axis J2.

[0045] The cylindrical portion 41 has a female thread portion 41a provided on its inner circumferential surface and a crimping portion 41b that bulges radially outward with respect to the second axis J2. The female thread portion 41a of the second connector portion 40B is located below (-Z) the crimping portion 41b. The crimping portion 41b is provided around the entire circumference of the outer circumferential surface of the cylindrical portion 41, centered on the second axis J2. The crimping portion 41b sandwiches the connecting end 31a between itself and the flange portion 42. Thus, the crimping portion 41b is formed by plastically deforming the cylindrical portion 41 after it has been inserted into the through hole 31h. The crimping portion 41b and the flange portion 42 sandwich the connecting end 31a in the axial direction, thereby fixing the second connector portion 40B to the second busbar 31B. Furthermore, the second connector section 40B is electrically connected to the second bus bar 31B.

[0046] A cable 50 is connected to the second connector section 40B. In the following description, the cable 50 connected to the second connector section 40B will be referred to as the second cable 50B. The second cable 50B has a second terminal 52 and a cable body 53.

[0047] The second terminal 52 is provided at the tip of the second cable 50B. The second terminal 52 is screw-shaped and fastened into the female thread portion 41a of the second connector portion 40B, similar to the second terminal 52 (see Figure 3). The second terminal 52 has a male thread portion 52a that is inserted into the female thread portion 41a, a terminal flange portion 52b that contacts the lower end surface of the cylindrical portion 41, and a terminal connection portion 52c that is connected to the cable body 53. In this example, the terminal connection portion 52c is a copper cylinder, but it may also be a copper or aluminum rod. Furthermore, a conductive material 49, which is a conductive tape or conductive paste, is interposed between the female thread portion 41a of the second connector portion 40B and the male thread portion 52a of the second terminal 52.

[0048] The connector portion 40 of this embodiment can be easily connected to the bus bar 31 by forming a crimped portion 41b. Therefore, the process of connecting the connector portion 40 to the bus bar 31 does not require a heating process such as soldering or welding, and the connection process can be simplified. As a result, the motor 100 can be manufactured at a low cost.

[0049] According to this embodiment, the connector portion 40 is cylindrical and extends in the axial direction. The connector portion 40 is connected to the cable 50 by the cable 50 being inserted in the axial direction. According to this embodiment, when the motor 100 is viewed from the axial direction, the connector portion 40 and the cable 50 connected to the connector portion 40 do not protrude radially. As a result, the axial projected area of ​​the motor 100 can be reduced.

[0050] According to this embodiment, the cable 50 can be connected to the connector 40 by tightening the male threaded portion 51a of the cable 50 into the female threaded portion 41a of the connector 40. This simplifies the process of connecting the cable 50 to the connector 40. In addition, the connection of the cable 50 to the connector 40 can also be easily disconnected, making it possible to easily perform maintenance on the motor 100 that involves replacing parts.

[0051] According to this embodiment, the conductive material 49 is interposed between the female thread portion 41a and the male thread portions 51a and 52a, filling the minute gap between the female thread portion 41a and the male thread portion 51a. This makes it possible to secure a larger connection area between the first connector portion 40A and the first terminal 51, and reduces the electrical resistance between the first connector portion 40A and the first terminal 51.

[0052] <Insulator> As shown in Figure 1, an insulator 81 is attached to the first busbar unit 30A. An insulator 82 is attached to the second busbar unit 30B. Insulators 81 and 82 are made of an insulating resin material. Insulators 81 and 82 are supported by the housing 60. In the following description, the insulator attached to the first busbar unit 30A will be referred to as the first insulator 81, and the insulator fixed to the second busbar unit 30B will be referred to as the second insulator 82.

[0053] As shown in Figure 2, the first insulator 81 is provided with a plurality of first openings 81a that open radially inward and a plurality of second openings 81b that open downward (-Z).

[0054] The first opening 81a opens radially inward. Multiple first openings 81a are arranged side by side along the circumferential direction. The connecting end 31a of the phase bus bar 31U, the connecting end 31a of the phase bus bar 31V, and the connecting end 31a of the phase bus bar 31W are inserted into each of the multiple first openings 81a.

[0055] One first opening 81a and one second opening 81b communicate with each other, forming a first communication space 83. That is, the first insulator 81 of this embodiment is provided with three first communication spaces 83 arranged along the circumferential direction. Each of the three first communication spaces 83 is provided with a different connection end 31a.

[0056] Figure 5 is a cross-sectional view showing the connection portion with a plurality of first busbars 31A, a plurality of first connector portions 40A, and a plurality of first cables 50A. As shown in Figure 5, the first insulator 81 has an enclosing wall portion 84 and two partition wall portions (wall portions) 85.

[0057] The surrounding wall portion 84 covers the three first communication spaces 83. The surrounding wall portion 84 is positioned between the housing 60 and the first communication spaces 83. The surrounding wall portion 84 insulates the connection ends 31a of the phase busbars 31U, 31V, and 31W, which are respectively located in the three first communication spaces 83, from the housing 60.

[0058] The partition wall 85 separates adjacent first communication spaces 83. The partition wall 85 is located between the connection ends 31a of busbars 31U, 31V, and 31W that are of different phases. The partition wall 85 insulates the connection ends 31a from each other. The partition wall 85 also insulates the connector portions 40 connected to each connection end 31a from each other. According to this embodiment, it is easier to ensure insulation between busbars 31 through which currents of different phases flow, thereby improving the reliability of the motor 100. Furthermore, because the partition wall 85 ensures insulation between the connection ends 31a, the connection ends 31a can be placed closer together. This enables miniaturization of the motor 100.

[0059] As shown in Figure 4, the second insulator 82 has a first member 82P and a second member 82Q. The first member 82P is attached to the second busbar unit 30B. The second member 82Q is located below (-Z) the first member 82P and is attached to the first member 82P.

[0060] The second insulator 82 is provided with a plurality (3) of first openings 82a that open radially inward, a plurality (3) of second openings 82b that open downward (-Z), and a plurality (3) of third openings 82c that open upward (+Z). One first opening 82a, one second opening 82b, and one third opening 82c communicate with each other to form a second communication space 88. That is, the first member 82P is provided with a plurality (3) of second communication spaces 88. The three second communication spaces 88 are arranged side by side in the circumferential direction (i.e., the depth direction of the paper in Figure 4). Each of the three second communication spaces 88 is provided with a connection end 31a of different phase busbars 31U, 31V, and 31W. Although not shown in the diagram, the first member 82P is provided with a wall portion that separates adjacent second communication spaces 88, similar to the first insulator 81 (see Figure 5). The wall portion is located between the connection ends 31a of the different phase busbars 31U, 31V, and 31W, and insulates them from each other.

[0061] The second member 82Q is cylindrical and extends in the axial direction. The second member 82Q extends downward (-Z) from the second opening 82b of the first member 82P. The upper end of the second member 82Q connects to the second opening 82b. The lower end of the second member 82Q opens downward (-Z) at the lower end of the housing 60.

[0062] <Housing> As shown in Figure 1, the housing 60 accommodates the shaft 8, a pair of bearings 9A and 9B, a rotor 10, a pair of stators 20, a pair of busbar units 30, a plurality of connector sections 40, and a pair of insulators 81 and 82.

[0063] The housing 60 includes a first housing member 61, a second housing member 62, and a lid member 63. The second housing member 62 is located above the first housing member 61. The lid member 63 is located above the second housing member 62. The first housing member 61 and the second housing member 62 are fixed to each other. The lid member 63 is also fixed to the second housing member 62. In this embodiment, the first housing member 61, the second housing member 62, and the lid member 63 are made of a metal material such as aluminum. The first housing member 61, the second housing member 62, and the lid member 63 may be made of a material other than a metal material such as resin.

[0064] The first housing member 61 has a first circumferential wall portion 61d, a first bearing holder portion 61a, and a lower wall portion 61e. The first circumferential wall portion 61d is substantially cylindrical in shape and extends axially with respect to the central axis J. The first circumferential wall portion 61d surrounds the first stator 20A from the radially outer side. The lower wall portion 61e is substantially annular plate in shape with respect to the central axis J. The lower wall portion 61e connects the outer circumferential surface of the first bearing holder portion 61a to the lower end of the first circumferential wall portion 61d. The lower wall portion 61e covers the first stator 20A from below.

[0065] The first circumferential wall portion 61d is provided with a first through-hole portion 61h and a first hole portion 60a. The first hole portion 60a and the first through-hole portion 61h are located on opposite sides in the radial direction with respect to the central axis J. The first through-hole portion 61h extends in the axial direction and penetrates the first circumferential wall portion 61d.

[0066] The first bearing holder portion 61a is positioned below the first stator 20A. The first bearing holder portion 61a is cylindrical in shape, surrounding the central axis J from the radially outer side. The first bearing holder portion 61a holds the bearing 9A. A lower cover 99, which covers the bearing 9A and the lower end of the shaft 8, is fixed to the lower end surface of the first bearing holder portion 61a.

[0067] The second housing member 62 has a second circumferential wall portion 62d, a second bearing holder portion 62a, and an upper wall portion 62e. The second circumferential wall portion 62d is substantially cylindrical in shape and extends axially with respect to the central axis J. The second circumferential wall portion 62d surrounds the first stator 20A from the radially outer side. The lower end of the second circumferential wall portion 62d is fixed to the upper end of the first circumferential wall portion 61d. The upper wall portion 62e is substantially annular plate in shape with respect to the central axis J. The upper wall portion 62e connects the outer circumferential surface of the second bearing holder portion 62a to the lower end of the second circumferential wall portion 62d. The upper wall portion 62e covers the second stator 20B from above (+Z).

[0068] A second through-hole 62h is provided in the second peripheral wall portion 62d. The second through-hole 62h extends axially and penetrates the second peripheral wall portion 62d. The lower end of the second through-hole 62h is connected to the first through-hole 61h. The first through-hole 61h and the second through-hole 62h constitute the second hole portion 60b. The upper opening of the first through-hole portion 61h is covered by a cover member 63. By removing the cover member 63 from the second housing member 62, the internal space of the second hole portion 60b can be exposed from above, and the second connector portion 40B, which is located inside the second hole portion 60b, can be assembled or replaced from above.

[0069] The second bearing holder portion 62a is positioned below the first stator 20A. The second bearing holder portion 62a is cylindrical and surrounds the central axis J from the radially outer side. The second bearing holder portion 62a holds the bearing 9B. That is, the housing 60 has a cylindrical second bearing holder portion 62a that holds the bearing 9B. The second bearing holder portion 62a has an upper surface 62b facing upward (+Z) and an outer peripheral surface 62c facing radially outward. The upper surface 62b is provided with an annular groove portion 62g that extends circumferentially with respect to the central axis J.

[0070] Next, the first hole 60a and the second hole 60b provided in the housing 60 will be described in detail. The first hole 60a and the second hole 60b are provided in the circumferential wall portion (first circumferential wall portion 61d, second circumferential wall portion 62d) that surrounds the internal space of the housing 60 from the radially outside. The first hole 60a is located radially outside the first stator 20A. The second hole 60b is located radially outside both the first stator 20A and the second stator 20B. The first hole 60a and the second hole 60b are located radially opposite each other with respect to the central axis J.

[0071] The first hole 60a and the second hole 60b both extend along the axial direction. The first hole 60a and the second hole 60b open on the lower side of the housing 60 (hereinafter referred to as the lower end surface 60f). In the following connections, the opening of the first hole 60a on the lower end surface 60f is referred to as the first hole opening 60e. On the other hand, the opening of the second hole 60b on the lower end surface 60f is referred to as the second hole opening 60i.

[0072] As shown in Figure 3, the first hole 60a has an axially extended portion 60c and a radially extended portion 60d. The axially extended portion 60c extends axially and opens downward (-Z) at the first hole opening 60e located on the lower end surface 60f of the housing 60. The radially extended portion 60d extends radially inward and connects the internal space of the housing 60 with the axially extended portion 60c. The first hole 60a extends from the first connector portion 40A, passes radially outside the first stator 20A, and reaches the lower side (-Z) of the housing 60.

[0073] The tip of the projection 30b of the first busbar unit 30A is inserted into the radially extending portion 60d from the radially inward direction. As a result, the multiple connection ends 31a located at the tip of the projection 30b, and the first connector portion 40A fixed to the connection ends 31a, are positioned inside the first hole portion 60a. Therefore, the first connector portion 40A is located radially outward of the first stator 20A. In this embodiment, the first connector portion 40A is located directly above the first hole opening 60e. That is, the first connector portion 40A overlaps with the first hole opening 60e when viewed from the axial direction. The first hole portion 60a extends downward (-Z) from the first connector portion 40A.

[0074] The first cable 50A is inserted into the first hole portion 60a through the first hole opening 60e. The first terminal 51 of the first cable 50A is connected to the first connector portion 40A inside the first hole portion 60a. That is, the first cable 50A is connected to the first connector portion 40A from below (-Z) through the first hole portion 60a.

[0075] A first insulator 81 is positioned inside the first hole 60a. The surrounding wall portion 84 of the first insulator 81 covers the inner surface of the first hole 60a. The connecting end 31a passes through the first opening 81a of the first insulator 81, and the first cable 50A passes through the second opening 81b. The connecting end 31a, the first connector portion 40A, and the first terminal 51 are positioned in the first communication space 83 of the first insulator 81. The first insulator 81 insulates the connecting end 31a, the first connector portion 40A, and the first terminal 51 from the housing 60.

[0076] As shown in Figure 4, the second hole 60b has an axially extended portion 60g and a radially extended portion 60h. The axially extended portion 60g extends axially and opens downward (-Z) at the first hole opening 60e located on the lower end surface 60f of the housing 60. The radially extended portion 60h extends radially inward and connects the internal space of the housing 60 with the axially extended portion 60g. The second hole 60b extends from the second connector portion 40B, through the radially outer side of the second stator 20B and the first stator 20A, to the lower side (-Z) of the housing 60.

[0077] The tip of the projection 30b of the second busbar unit 30B is inserted into the radially extending portion 60h from the radially inward direction. As a result, the multiple connection ends 31a located at the tip of the projection 30b, and the second connector portion 40B fixed to the connection ends 31a, are positioned inside the second hole portion 60b. Therefore, the second connector portion 40B is located radially outward of the second stator 20B. In this embodiment, the second connector portion 40B is located directly above the second hole opening 60i. That is, the second connector portion 40B overlaps with the second hole opening 60i when viewed from the axial direction. Therefore, the second hole portion 60b extends downward (-Z) from the first connector portion.

[0078] The second cable 50B is inserted into the second hole portion 60b through the second hole opening 60i. The second terminal 52 of the second cable 50B is connected to the second connector portion 40B inside the second hole portion 60b. That is, the second cable 50B is connected to the second connector portion 40B from below (-Z) through the second hole portion 60b.

[0079] A second insulator 82 is positioned inside the second hole 60b. Similar to the first insulator 81, a connection end 31a, a second connector portion 40B, and a second terminal 52 are positioned in the second communication space 88 of the second insulator 82. The second insulator 82 insulates the connection end 31a, the second connector portion 40B, and the second terminal 52 from the housing 60.

[0080] As shown in Figure 1, according to this embodiment, the housing 60 is provided with a first hole 60a and a second hole 60b that extend axially and open downward at the lower end surface of the housing 60. The first cable 50A is connected to the first bus bar 31A via the first connector part 40A inside the first hole 60a and is pulled out from below to the lower part of the housing 60. Similarly, the second cable 50B is connected to the second bus bar 31B via the second connector part 40B inside the second hole 60b and is pulled out from below to the lower part of the housing 60. As a result, the connector part 40 and the cables 50 can be prevented from protruding radially outward from the housing 60. In other words, according to this embodiment, the connector part 40 in the radial direction of the motor 100 can be made smaller. Consequently, the axial projected area of ​​the motor 100 is reduced, and the motor 100, which is located below the propeller 1100, can be prevented from obstructing the downward airflow by the propeller 1100.

[0081] In this embodiment, the first opening 60e of the first hole portion 60a and the second opening 60i of the second hole portion 60b both face downwards. In addition, the first cable 50A and the second cable 50B extend downwards from the lower end surface 60f of the housing 60. Therefore, when the propulsion device 1000 is used outdoors, it is difficult for moisture such as rainwater to enter the inside of the housing 60 through the first opening 60e and the second opening 60i. In this embodiment, the reliability of the motor 100 against moisture can be improved.

[0082] <Bearing cover> The bearing cover 90 is located above (+Z) the second bearing holder portion 62a. In this embodiment, the bearing cover 90 is made of a metal material and is formed by press working. However, the bearing cover 90 may also be made of a resin material.

[0083] The bearing cover 90 has a cover body portion 91, an annular projection portion 92, a cylindrical portion 93, and a fixed cylindrical portion 94. The cover body portion 91 is plate-shaped with its thickness in the axial direction. The cover body portion 91 is circular with its center axis J. In the axial direction, the cover body portion 91 faces the bearing 9B and the upper surface 62b of the second bearing holder portion 62a. A circular through-hole 91h is provided in the center of the cover body portion 91 through which the shaft 8 passes.

[0084] The fixed cylindrical portion 94 is cylindrical in shape and protrudes upward (+Z) from the inner edge of the through hole 91h. The space between the inner circumferential surface of the fixed cylindrical portion 94 and the outer circumferential surface of the shaft 8 is sealed with a sealing material or the like. The fixed cylindrical portion 94 is provided with a fixing hole that penetrates radially. A fixing screw 8a is inserted into the fixing hole. The fixing screw 8a is then tightened into a screw hole on the outer circumferential surface of the shaft 8. As a result, the bearing cover 90 is fixed to the outer circumferential surface of the shaft 8. The bearing cover 90 also rotates together with the shaft 8 about the central axis J.

[0085] The annular projection 92 is provided on the cover body 91. The annular projection 92 protrudes downward (-Z) from the cover body 91. The annular projection 92 is an annular shape with a central axis J. The annular projection 92 is inserted into the groove 62g of the second bearing holder 62a. The lower end of the annular projection 92 faces the bottom surface of the groove 62g with a gap between them inside the groove 62g.

[0086] The cylindrical portion 93 is cylindrical with its central axis J as the center. The cylindrical portion 93 is connected to the outer edge of the cover body portion 91. Therefore, the cylindrical portion 93 is located radially outside the annular projection portion 92. The cylindrical portion 93 protrudes downward (-Z) relative to the cover body portion 91. The cylindrical portion 93 surrounds the outer circumferential surface 62c of the second bearing holder portion 62a from the radially outside.

[0087] The motor 100 of this embodiment has a bearing cover 90 that is fixed to the shaft 8 and extends radially outward from the shaft 8, covering the bearing 9B from above (+Z). In particular, in this embodiment, the upper end of the shaft 8 extends upward from the housing 60 and is fixed to the propeller 1100. Therefore, the bearing 9B is exposed from above. In a motor 100 for rotating the propeller 1100, as in this embodiment, water droplets such as rain can easily enter from above. According to this embodiment, the bearing cover 90 covers the bearing 9B from above, which suppresses moisture from coming into contact with the bearing 9B and prevents the lubrication of the bearing 9B from being impaired. Furthermore, it is possible to prevent moisture from passing through the bearing 9B and entering the stator 20 and rotor 10 inside the housing 60, thereby improving the reliability of the motor 100.

[0088] In particular, the bearing cover 90 of this embodiment has a shape that conforms to the surface shape of the second bearing holder portion 62a. That is, the bearing cover 90 has a cover body portion 91 and an annular protrusion portion 92 that extend along the upper surface 62b and groove portion 62g of the upper surface 62b of the second bearing holder portion 62a, and a cylindrical portion 93 that extends along the outer peripheral surface 62c. As a result, the gap between the bearing cover 90 and the second bearing holder portion 62a, which could become a pathway for moisture to enter, can be made into an intricate labyrinth structure. This makes it possible to suppress the intrusion of moisture from the radially outer end of the gap between the bearing cover 90 and the second bearing holder portion 62a toward the radially inner side.

[0089] <Cable cover> As shown in Figure 5, the cable cover 70 is fixed to the lower end surface 60f of the housing 60. The cable cover 70 surrounds the cable 50 from the radially outer side with respect to the first axis J1. Here, the cable cover 70 attached to the first cable 50A will be described based on Figure 5. Note that the cable cover 70 is also attached to the second cable 50B. The cable cover 70 attached to the second cable 50B has the same configuration as the cable cover 70 attached to the first cable 50A.

[0090] In this embodiment, the cable 50 is inserted into the housing 60 and connected to the bus bar 31 inside the housing 60. The cable cover 70 in this embodiment functions as a waterproof cover to prevent moisture from entering the housing 60 via the outer surface of the cable 50. In addition, the cable 50 in this embodiment is connected to the bus bar 31 by tightening the male threaded portion 51a of the first terminal 51 (or second terminal 52) provided at the tip into the female threaded portion 41a of the connector portion 40. The cable cover 70 in this embodiment functions as a loosening prevention mechanism to prevent the cable 50 from rotating in the circumferential direction of the male threaded portion 51a.

[0091] The cable cover 70 includes one base member 71, three cap members, three first sealing members 76, and one second sealing member 77.

[0092] The base member 71 is fixed to the housing 60. The base member 71 has three cylindrical threaded portions 71a and one flange portion 71c.

[0093] The three cylindrical threaded portions 71a are cylindrical in shape, extending axially with respect to the first axis J1. Therefore, the three cylindrical threaded portions 71a are arranged side by side along the circumferential direction. The inner diameter of the cylindrical threaded portions 71a is slightly larger than the outer diameter of the cable body 53 and the terminal connection portion 51c. The cable 50 is inserted inside the cylindrical threaded portions 71a. The cylindrical threaded portions 71a surround the cable 50 from the radially outer side of the first axis J1. A male threaded portion 71b is provided on the outer circumferential surface of the cylindrical threaded portion 71a.

[0094] The flange portion 71c protrudes radially outward from the upper end of the cylindrical threaded portion. The flange portion 71c is plate-shaped and extends along a plane perpendicular to the axial direction. The upper surface of the flange portion 71c is in contact with the lower end surface 60f of the housing 60. The lower end surface 60f of the housing 60 is provided with a groove portion 60k that surrounds the first hole opening 60e when viewed from the axial direction. An annular second sealing member 77 is also positioned in the groove portion 60k. Therefore, the second sealing member 77 surrounds the first hole opening 60e when viewed from the axial direction. The second sealing member 77 is made of an elastic material such as rubber or elastomer resin. The upper surface of the flange portion 71c covers the groove portion 60k. The upper surface of the flange portion 71c sandwiches the second sealing member 77 between itself and the bottom surface of the groove portion 60k. That is, the second sealing member 77 is sandwiched between the flange portion 71c and the lower end surface 60f of the housing 60. According to this embodiment, the second sealing member 77 seals the space between the flange portion 71c and the housing 60, thereby preventing moisture from entering the interior of the housing 60 from the space between the flange portion 71c and the housing 60.

[0095] The cap member 72 is fixed to the base member 71. The cap member 72 is cylindrical with the first axis J1 as its center. The cap member 72 has a nut portion 72a, a retaining cylinder portion 72c, and an inner projection portion 72d.

[0096] The nut portion 72a is annular in shape with the first axis J1 as its center. A female thread portion 72b is formed on the inner circumferential surface of the nut portion 72a. Preferably, the outer circumferential surface of the nut portion 72a is hexagonal nut-shaped in order to rotate the cap member 72. The male thread portion 71b of the cylindrical thread portion 71a engages with the female thread portion 72b. The male thread portion 71b of the cylindrical thread portion 71a is inserted into the nut portion 72a.

[0097] The retaining cylinder portion 72c is cylindrical and surrounds the first axis J1. The retaining cylinder portion 72c extends downward (-Z) from the nut portion 72a. The retaining cylinder portion 72c surrounds the outer surface of the cable body 53 from the radially outside of the first axis J1, with a gap in between.

[0098] The inner projection 72d is an annular shape surrounding the first axis J1. The inner projection 72d protrudes radially inward from the lower part of the retaining cylinder 72c relative to the first axis J1. The inner diameter of the inner projection 72d is slightly larger than the outer diameter of the cable body 53. The upper surface of the inner projection 72d faces the lower surface of the cylindrical screw portion 71a in the axial direction.

[0099] The first sealing member 76 is annular in shape centered on the first axis J1. The first sealing member 76 is made of an elastic material such as rubber or elastomer resin. In this embodiment, the first sealing member 76 is cylindrical in shape and extends in the axial direction. The first sealing member 76 is positioned inside the retaining cylinder portion 72c. The first sealing member 76 surrounds the cable body 53 from the radially outer side of the first axis J1. That is, the first sealing member 76 is positioned between the cable body 53 and the retaining cylinder portion 72c in the radial direction of the first axis J1. Furthermore, the first sealing member 76 is positioned between the lower surface of the cylindrical screw portion 71a and the upper surface of the inner projection portion 72d in the axial direction. That is, the first sealing member 76 is positioned radially inside the retaining cylinder portion 72c and is sandwiched between the cylindrical screw portion 71a and the inner projection portion 72d.

[0100] In this embodiment, as the nut portion 72a of the cap member 72 is tightened onto the male thread portion 71b of the cylindrical thread portion 71a, the upper surface of the inner projection 72d approaches the lower surface of the cylindrical thread portion 71a. As a result, the first sealing member 76 is pressed against the lower side of the cylindrical thread portion 71a, sealing the lower surface of the cylindrical thread portion 71a and preventing moisture from entering along the lower surface of the cylindrical thread portion 71a. Furthermore, the first sealing member 76 is compressed axially between the upper surface of the inner projection 72d and the lower surface of the cylindrical thread portion 71a. The axially compressed first sealing member 76 is pressed against the outer circumferential surface of the cable body 53. As a result, the first sealing member 76 seals the outer circumferential surface of the cable body 53, preventing liquid from entering the interior of the housing 60 along the outer circumferential surface of the cable body 53. Furthermore, the first sealing member 76 is pressed against the outer surface of the cable body 53, which suppresses the rotation of the cable 50 around the first axis J1. This prevents the first terminal 51 (or second terminal 52) of the cable 50 from loosening relative to the connector portion 40.

[0101] <Second Embodiment> Figures 6 and 7 are partial cross-sectional views of the motor 200 of the second embodiment, respectively. The motor 200 of the second embodiment differs from the first embodiment mainly in the connection structure between the busbar 31 and the cable 150. Components identical to those in the above-described embodiments are denoted by the same reference numerals, and their descriptions are omitted.

[0102] As shown in Figures 6 and 7, the motor 200 of this embodiment, like the embodiment described above, comprises a rotor 10, a pair of stators 20, a pair of busbar units 130, a housing 160, a plurality of cables 150, and two cable covers 170. However, unlike the embodiment described above, the motor 200 of this embodiment does not have a connector section, but instead, as shown in Figure 7, it comprises a relay section 140 and a relay section holder 149. It is equipped with.

[0103] Similar to the embodiment described above, the busbar unit 130 of this embodiment includes a plurality of busbars 31 and a busbar holder 135 that supports the plurality of busbars 31. The busbars 31 also have connection ends 31a. In the following description, the connection end 31a of the first busbar 31A connected to the first stator 20A shown in Figure 6 will be referred to as the first connection end 31aA, and the connection end 31a of the second busbar 31B connected to the second stator 20B shown in Figure 7 will be referred to as the second connection end 31aB.

[0104] As shown in Figures 6 and 7, the first connecting end 31aA and the second connecting end 31aB are plate-shaped with the axial direction being the thickness direction. Furthermore, the first connecting end 31aA and the second connecting end 31aB each have a through hole 31h that penetrates in the axial direction.

[0105] As shown in Figure 6, cable 150 is connected to the first connection end 31aA. In the following description, cable 150 connected to the first connection end 31aA will be referred to as the first cable 150A.

[0106] The first cable 150A has a cable body 53 extending along the axial direction and a first terminal 151 fixed to the end of the cable body 53. The first terminal 151 has a first terminal plate 151b and a terminal connection portion 151c. That is, the first cable 150A has a first terminal plate 151b and a terminal connection portion 151c. The terminal connection portion 151c is cylindrical and extends along the axial direction. The terminal connection portion 151c is connected to the cable body 53 by means of crimping or other means. That is, the first terminal 151 is connected to the cable body 53 at the terminal connection portion 151c.

[0107] The first terminal plate 151b is located at the tip of the first cable 150A. The first terminal plate 151b is plate-shaped and extends along a plane perpendicular to the axial direction. That is, the first terminal plate 151b is positioned perpendicular to the direction in which the cable body 53 extends (axial direction).

[0108] The upper surface of the first terminal plate 151b is in contact with the lower surface of the first connection end 31aA. The first terminal plate 151b is provided with a through hole 151h that penetrates axially. The through hole 151h of the first terminal plate 151b overlaps with the through hole 31h of the first connection end 31aA when viewed from the axial direction.

[0109] A fastening screw 105a is inserted into the through hole 151h of the first terminal board 151b and the through hole 31h of the first connection end 31aA. The fastening screw 105a is then tightened into a nut 105b supported by the busbar holder 135 on the upper side (+Z) of the first connection end 31aA. As a result, the first terminal board 151b is fastened to the first connection end 31aA from below (-Z). This connects the first cable 150A to the first busbar 31A.

[0110] As shown in Figure 7, a relay unit 140 is connected to the second connection end 31aB. That is, the relay unit 140 is connected to the second busbar 31B. A cable 150 is also connected to the relay unit 140. That is, the cable 150 is connected to the second connection end 31aB via the relay unit 140. In the following description, the cable 150 connected to the second connection end 31aB will be referred to as the second cable 150B.

[0111] The relay section 140 is axial in shape and extends along the axial direction. The relay section 140 extends downward from the second connecting end 31aB, passing radially outside the first stator 20A and the second stator 20B. In the motor 200 of this embodiment, three relay sections 140 are provided, corresponding to the second busbars 31B of the U phase, V phase, and W phase.

[0112] A first screw hole 141 opening upward (+Z) is provided at the upper end of the relay section 140. A second screw hole 142 opening downward (-Z) is provided at the lower end of the relay section 140.

[0113] The upper end of the intermediate section 140 contacts the lower end surface of the second connecting end 31aB. The first screw hole 141 overlaps with the through hole 31h of the second connecting end 31aB when viewed from the axial direction. A fastening screw 106 is inserted into the through hole 31h of the second terminal plate 152b. The fastening screw 106 is then tightened into the first screw hole 141. As a result, the intermediate section 140 is fastened to the second connecting end 31aB. The intermediate section 140 extends downward (-Z) from the second connecting end 31aB.

[0114] The relay holder 149 is made of an insulating material such as resin. The relay holder 149 is molded with three relay sections 140 embedded within it. The relay holder 149 holds the three relay sections 140 and insulates the three relay sections 140 from each other.

[0115] The second cable 150B has a cable body 53 extending along the axial direction and a second terminal 152 fixed to the end of the cable body 53. The second terminal 152 has a second terminal plate 152b and a terminal connection portion 152c. That is, the second cable 150B has a second terminal plate 152b and a terminal connection portion 152c. The terminal connection portion 152c is cylindrical and extends along the axial direction. The terminal connection portion 152c is connected to the cable body 53 by means of crimping or other means. That is, the second terminal 152 is connected to the cable body 53 at the terminal connection portion 152c.

[0116] The second terminal plate 152b is located at the tip of the second cable 150B. The second terminal plate 152b is plate-shaped and extends along a plane perpendicular to the axial direction. That is, the second terminal plate 152b is positioned perpendicular to the direction in which the cable body 53 extends (axial direction).

[0117] The upper surface of the second terminal board 152b contacts the lower end of the relay section 140 from below (-Z). The second terminal board 152b is provided with a through hole 152h that penetrates axially. The through hole 152h of the second terminal board 152b coincides with the second screw hole 142 of the relay section 140 when viewed from the axial direction. A fastening screw 107 is inserted into the through hole 152h of the second terminal board 152b. The fastening screw 107 is then tightened into the second screw hole 142. As a result, the second terminal board 152b is fastened to the relay section 140 from below (-Z). As a result, the second cable 150B is connected to the second bus bar 31B.

[0118] As shown in Figure 7, the housing 160 includes a first housing member 161, a second housing member 162, and a lid member 163. The housing 160 accommodates the rotor 10, a pair of stators 20, a pair of busbar units 130, a relay section 140, and a relay section holder 149.

[0119] The second housing member 162 is located above (+Z) the first housing member 161. The lid member 163 is located above (+Z) the second housing member 162. The first housing member 161 and the second housing member 162 are fixed to each other. The lid member 163 is also fixed to the second housing member 162.

[0120] As shown in Figure 6, the first housing member 161 has a first circumferential wall portion 161d and a lower wall portion 161e. The first circumferential wall portion 161d is substantially cylindrical in shape and extends axially with respect to the central axis J. The first circumferential wall portion 161d surrounds the first stator 20A from the radially outer side. The lower wall portion 161e is substantially annular plate in shape with respect to the central axis J. The lower wall portion 161e covers the first stator 20A from below (-Z).

[0121] A first opening 160a is provided in the lower wall portion 161e. That is, the housing 160 is provided with a first opening 160a. The first opening 160a penetrates the lower wall portion 161e in the axial direction. The first opening 160a overlaps the first connecting end 31aA when viewed from the axial direction. The first opening 160a exposes the first connecting end 31aA to the lower side (-Z).

[0122] In this embodiment, the first terminal board 151b is fastened to the first connecting end 31aA from below (-Z) through the first opening 160a. The first opening 160a is covered by the cable cover 170.

[0123] According to this embodiment, the housing 160 is provided with a first opening 160a and a second opening 160b that open downwards (-Z). The first cable 150A is fastened from downwards (-Z) through the first opening 160a to the first connecting end 31aA of the first busbar 31A. This prevents the first cable 150A from protruding radially outward relative to the first connecting end 31aA. As a result, according to this embodiment, the motor 200 can be made smaller in the radial direction.

[0124] Furthermore, as shown in Figure 7, a first through-hole 161h is provided in the first peripheral wall portion 161d. The first through-hole 161h penetrates the first peripheral wall portion 161d in the axial direction. A second opening 160b is provided at the lower end of the first through-hole 161h. That is, the housing 160 is provided with a second opening 160b. The second opening 160b overlaps with the lower end of the relay portion 140 when viewed from the axial direction. The second opening 160b exposes the lower end of the relay portion 140 to the lower side (-Z).

[0125] In this embodiment, the second terminal board 152b is fastened from below (-Z) to the lower end of the relay section 140 through the second opening 160b. The second opening 160b is covered by the cable cover 170.

[0126] The second housing member 162 has a second circumferential wall portion 162d and an upper wall portion 162e. The second circumferential wall portion 162d is substantially cylindrical in shape and extends axially with respect to the central axis J. The second circumferential wall portion 162d surrounds the second stator 20B from the radially outer side. The lower end of the second circumferential wall portion 162d is fixed to the upper end of the first circumferential wall portion 161d. The upper wall portion 162e is substantially annular plate in shape with respect to the central axis J. The upper wall portion 162e covers the second stator 20B from above (+Z).

[0127] A second through-hole 162h is provided in the second peripheral wall portion 162d. The second through-hole 162h penetrates the second peripheral wall portion 162d in the axial direction. A third opening 160c is provided at the upper end of the second through-hole 162h. That is, the housing 160 is provided with a third opening 160c. The third opening 160c overlaps the second connecting end portion 31aB when viewed from the axial direction. The third opening 160c exposes the second connecting end portion 31aB to the upper side (+Z).

[0128] According to this embodiment, an operator (or assembly device) assembling the motor 200 can access the second connecting end 31aB through the third opening 160c and fasten the second connecting end 31aB to the upper end of the intermediate section 140 using the fastening screw 106. After the fastening is complete, the third opening 160c is closed by the cover member 163.

[0129] According to this embodiment, an axially extending relay portion 140 is fastened to the second connection end 31aB of the second busbar 31B, and the second cable 150B is fastened to the relay portion 140 from below (-Z) through the second opening 160b. Therefore, it is possible to suppress the first cable 150A from protruding radially outward relative to the second connection end 31aB. As a result, that is, according to this embodiment, the motor 200 can be made smaller in the radial direction.

[0130] In this embodiment, the upper end of the first through-hole 161h is connected to the lower end of the second through-hole 162h. The first through-hole 161h and the second through-hole 162h communicate with each other and constitute a relay section housing space 169. That is, the housing is provided with a relay section housing space 169. The upper end of the relay section housing space 169 opens upward (+Z) at the third opening 160c. The lower end of the relay section housing space 169 opens downward (-Z) at the second opening 160b.

[0131] The relay section housing space 169 houses the relay section 140 and the relay section holder 149. The relay section holder 149 covers the inner surface of the relay section housing space 169 and insulates the relay section 140 from the housing 160.

[0132] As shown in Figures 6 and 7, the two cable covers 170 are fixed to the lower (-Z) side of the housing 160. The two cable covers 170 each support either the first cable 150A or the second cable 150B and cover either the first opening 160a or the second opening 160b. The cable covers 170 are made of an insulating material such as a resin material.

[0133] As shown in Figure 6, one cable cover 170 surrounds the first cable 150A from the radially outside with respect to the first axis J1. As shown in Figure 7, the other cable cover 170 surrounds the second cable 150B from the radially outside with respect to the second axis J2.

[0134] Similar to the embodiments described above, the cable cover 170 of this embodiment includes a base member 171, a cap member 72, a first sealing member 76, and a second sealing member 177.

[0135] The base member 171 is fixed to the housing 160. The base member 171 covers the first opening 160a (see Figure 6) or the second opening 160b (see Figure 7). A second sealing member 177 is sandwiched between the base member 171 and the lower wall portion 161e. According to this embodiment, the second sealing member 177 seals the space between the base member 171 and the housing 160, thereby preventing moisture from entering the interior of the housing 160 from the space between the base member 171 and the housing 160.

[0136] Similar to the embodiment described above, the base member 171 has a cylindrical threaded portion 71a. A male threaded portion 71b is provided on the outer circumferential surface of the cylindrical threaded portion 71a. The cap member 72 has a nut portion 72a that is tightened onto the male threaded portion 71b, a retaining cylinder portion 72c that extends downward (-Z) from the nut portion 72a, and an inner projection portion 72d that protrudes radially inward from the lower part of the retaining cylinder portion 72c along the first axis J1.

[0137] The first sealing member 76 is cylindrical in shape and extends in the axial direction. The first sealing member 76 is positioned inside the retaining cylinder portion 72c. In the axial direction, the first sealing member 76 is positioned between the lower surface of the cylindrical screw portion 71a and the upper surface of the inner projection portion 72d.

[0138] In this embodiment, as the nut portion 72a of the cap member 72 is tightened onto the male thread portion 71b of the cylindrical thread portion 71a, the upper surface of the inner projection 72d approaches the lower surface of the cylindrical thread portion 71a. As a result, the first sealing member 76 is pressed against the lower side (-Z) of the cylindrical thread portion 71a, sealing the lower surface of the cylindrical thread portion 71a and preventing moisture from entering along the lower surface of the cylindrical thread portion 71a. Furthermore, the first sealing member 76 is compressed axially between the upper surface of the inner projection 72d and the lower surface of the cylindrical thread portion 71a. The axially compressed first sealing member 76 is pressed against the outer circumferential surface of the cable body 53. As a result, the first sealing member 76 seals the outer circumferential surface of the cable body 53, preventing liquid from entering the interior of the housing 160 along the outer circumferential surface of the cable body 53. Furthermore, the first sealing member 76 is pressed against the outer surface of the cable body 53, thereby suppressing the rotation of the cable 150 around the first axis J1.

[0139] Although embodiments and modifications of the present invention have been described above, the configurations and combinations thereof in the embodiments are merely examples, and additions, omissions, substitutions, and other modifications are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited by the embodiments.

[0140] The motor to which the present invention is applied is applicable to various types of equipment. For example, the motor can be applied to a rotating electric machine such as a generator equipped with a propeller that rotates in response to wind. In this case, the rotating electric machine may be a three-phase AC generator. The application of the rotating electric machine is not particularly limited. The configurations described herein can be combined as appropriate, within the bounds of mutual non-contradictory relationships.

[0141] Furthermore, this technology can be configured as follows: (A1) A rotor that can rotate around its central axis, A first stator is located axially opposite to the rotor and on one side of the rotor in the axial direction, A second stator is located opposite the rotor in the axial direction and on the other side of the rotor in the axial direction, A first busbar connected to the first stator, A second busbar connected to the second stator, A first connector portion fixed to the first busbar, A second connector portion fixed to the second busbar, A housing that accommodates the rotor, the first stator, the second stator, the first busbar, and the second busbar, A first cable connected to the first connector and pulled out to the outside of the housing, The device comprises a second cable connected to the second connector and extended to the outside of the housing, The aforementioned housing includes, A first hole extending from the first connector portion toward one axial direction, A second hole is provided extending from the second connector portion toward one axial direction, The first cable is connected to the first connector portion from one axial side through the first hole, The second cable is connected to the second connector portion from one axial side through the second hole, The second connector portion is located radially outward of the second stator, The second hole extends from the second connector portion, through the radially outer side of the second stator and the first stator, to one axial side of the housing of the motor. (A2) A cable cover is provided that surrounds at least one of the first cable or the second cable from the radially outward side with respect to the axis extending in the axial direction, The aforementioned cable cover is A base member fixed to the aforementioned housing, A cap member fixed to the base member, It has an annular first sealing member, The base member has a cylindrical threaded portion that surrounds the cable from the radially outer side of the axis and has a male threaded portion on its outer surface, The aforementioned cap member is The nut portion into which the aforementioned male thread portion is inserted, A cylindrical retaining cylinder that surrounds the aforementioned axis and extends from the nut portion to one side in the axial direction, The retaining cylinder portion has an annular inner projection that protrudes radially inward from one axial end of the cylinder portion, The motor according to (A1), wherein the first sealing member is located radially inside the retaining cylinder portion and sandwiched between the cylindrical screw portion and the inner protrusion. (A3) The base member has a flange portion that protrudes radially outward from the other end of the cylindrical screw portion on the axial side, The motor as described in (A2), wherein a second sealing member is sandwiched between the flange portion and the surface of the housing facing one axial side. (A4) At least one of the first busbar or the second busbar has a plate-shaped connecting end with the axial direction as the thickness direction, The aforementioned connecting end is provided with a through hole. At least one of the first connector portion or the second connector portion is A cylindrical portion inserted into the aforementioned through hole, The cylindrical portion has a flange portion that protrudes radially outward from the axial end, The aforementioned cylindrical portion is The female thread portion provided on the inner circumferential surface, It has a crimping portion that bulges radially outward and sandwiches the connecting end between itself and the flange portion, A motor according to any one of (A1) to (A3), wherein a screw-shaped terminal that is tightened into the female thread portion is provided at the tip of at least one of the first cable or the second cable. (A5) The motor according to (A4), wherein a conductive tape or conductive paste is interposed between the female thread portion and the terminal. (A6) A plurality of busbars through which currents of different phases flow, Multiple connector parts, each fixed to a different busbar, Multiple cables connected to different connector sections, The motor according to (A4) or (A5), comprising: an insulator having a wall portion located between the connecting ends of the busbars which are different from each other. (A7) A shaft fixed to the rotor and extending axially with respect to the central axis, A bearing located on the other axial side of the rotor, which rotatably supports the shaft, A motor according to any one of (A1) to (A6), comprising: a bearing cover fixed to the shaft and extending radially outward from the shaft to cover the bearing from the other axial side. (A8) The housing has a cylindrical bearing holder portion that holds the bearing, The bearing holder portion is provided with an annular groove extending along the circumferential direction on the surface facing the other axial direction. The aforementioned bearing cover is A plate-shaped cover body with the axial direction as the thickness direction, An annular projection is provided that protrudes from the cover body in one axial direction and is inserted into the groove, The motor according to (A7), having a cylindrical portion that protrudes radially outward from the cover body portion on one axial side from the radially outward side of the annular protrusion portion and surrounds the outer circumferential surface of the bearing holder portion from the radially outward side. (A9) A rotor that can rotate around its central axis, A first stator is located axially opposite to the rotor and on one side of the rotor in the axial direction, A first busbar connected to the first stator, A housing that accommodates the rotor, the first stator, and the first busbar, A first cable connected to the first busbar and routed to the outside of the housing, Equipped with, The first busbar has a plate-shaped first connecting end with its thickness oriented axially, The aforementioned first cable is A first cable body extending along the axial direction, The first cable has a plate-shaped first terminal plate located at its tip and extending along a plane perpendicular to the axial direction, The housing is provided with a first opening that exposes the first connecting end to one side in the axial direction. A motor, wherein the first terminal plate is fastened to the first connection end from one axial side through the first opening. (A10) A second stator that is axially opposed to the rotor and located on the other axial side of the rotor, A second busbar connected to the second stator, A relay unit connected to the second busbar, The system includes a second cable connected to the relay section and brought out to the outside of the housing, The housing accommodates the second stator, the second busbar, and the relay section. The second busbar has a plate-shaped second connecting end with its thickness oriented axially, The relay portion is fastened to the second connecting end at the other end on the axial side, and extends from the second connecting end through the radially outer side of the first stator and the second stator to one side on the axial side, The second cable is, The second cable body extends along the axial direction, The second cable has a plate-shaped second terminal plate located at its tip and extending along a plane perpendicular to the axial direction, The housing is provided with a second opening that exposes one axial end of the relay portion to the axial side. The motor according to (9), wherein the second terminal plate is fastened from one axial side to one axial end of the relay portion through the second opening. (A11) A relay section case made of insulating material surrounds the relay section, The motor according to (10), wherein the housing is provided with a relay section housing space for housing the relay section and the relay section case. (A12) Equipped with two cable covers made of insulating material, The motor according to (10) or (11), wherein the two cable covers each cover the first opening or the second opening and each surround at least one of the first cable or the second cable from the radially outward side with respect to the axis extending in the axial direction. (A13) The cable cover is A base member fixed to the aforementioned housing, A cap member fixed to the base member, It has an annular first sealing member, The base member has a cylindrical threaded portion that surrounds the cable from the radially outer side of the axis and has a male threaded portion on its outer surface, The aforementioned cap member is The nut portion into which the aforementioned male thread portion is inserted, A cylindrical retaining cylinder that surrounds the aforementioned axis and extends from the nut portion to one side in the axial direction, The retaining cylinder portion has an annular inner projection that protrudes radially inward from one axial end of the cylinder portion, The motor according to (12), wherein the first sealing member is located radially inside the retaining cylinder portion and sandwiched between the cylindrical screw portion and the inner protrusion portion.

[0142] Furthermore, this technology can be configured as follows: (B1) A rotor that can rotate around its central axis, A stator facing the rotor, A busbar connected to the stator, A connector portion fixed to the busbar, A housing that accommodates the rotor, the stator, and the busbar, A cable connected to the connector and extended to the outside of the housing, The busbar has plate-shaped connecting ends, The aforementioned connecting end is provided with a through hole. The aforementioned connector portion is A cylindrical portion inserted into the aforementioned through hole, The cylindrical portion has a flange portion that protrudes radially outward from the axial end, The aforementioned cylindrical portion is The female thread portion provided on the inner circumferential surface, It has a crimped portion that bulges radially outward, The tip of the cable is provided with a screw-shaped terminal that is tightened into the female threaded portion. The crimped portion is, An annular first crimping portion protruding radially outward from the outer circumferential surface of the cylindrical portion, An annular second crimping portion located on the connection end side of the first crimping portion in the axial direction and protruding radially outward from the outer circumferential surface of the cylindrical portion, It has a third crimping portion that connects the radially outer ends of the first crimping portion and the second crimping portion, A motor in which the connecting end is sandwiched between the second crimped portion and the flange portion. (B2) The motor according to (B1), wherein a conductive tape or conductive paste is interposed between the female thread portion and the terminal. (B3) A plurality of busbars through which currents of different phases flow, Multiple connector parts, each fixed to a different busbar, Multiple cables connected to different connector sections, The motor according to (B1) or (B2), comprising: an insulator having a wall portion located between the connecting ends of the busbars which are different from each other. (B4) The stator comprises a first stator located on one axial side of the rotor and a second stator located on the other axial side of the rotor, The busbar comprises a first busbar connected to the first stator and a second busbar connected to the second stator. The connector portion comprises a first connector portion fixed to the first busbar and a second connector portion fixed to the second busbar. The motor according to any one of (B1) to (B3), comprising, as the cable, a first cable connected to the first connector portion and a second cable connected to the second connector portion. [Explanation of Symbols]

[0143] 8...Shaft, 9A,9B...Bearing, 10...Rotor, 11...Holder, 20...Stator, 20A...First stator, 20B...Second stator, 30b...Protrusion, 31...Busbar, 31a...Connecting end, 31aA...First connecting end, 31aB...Second connecting end, 31h...Through hole, 31A...First busbar, 31B...Second busbar, 40...Connector part, 40A...First connector part, 4 0B...Second connector section, 41...Cylindrical section, 41a, 72b...Female thread section, 41b...Crimped section, 42, 71c...Flange section, 50, 150...Cable, 50A, 150A...First cable, 50B, 150B...Second cable, 51a, 52a, 71b...Male thread section, 51...First terminal (terminal), 52...Second terminal (terminal), 53...Cable body, 60, 16 0…Housing, 60a…First hole, 60b…Second hole, 62g…Groove, 62a…Second bearing holder (bearing holder), 62c…Outer surface, 70, 170…Cable cover, 71, 171…Base member, 71a…Cylindrical screw part, 72…Cap member, 72a…Nut part, 72c…Retaining cylinder part, 72d…Inner protrusion, 76…First sealing member, 77, 177…Second sealing Components, 81, 82... Insulator, 85... Partition wall (wall section), 90... Bearing cover, 91... Cover body, 92... Annular protrusion, 100, 200... Motor, 140... Intermediate section, 151b... First terminal board, 152b... Second terminal board, 160a... First opening, 160b... Second opening, 169... Intermediate section housing space, J... Central axis, J1... First axis (axis), J2... Second axis (axis)

Claims

1. A rotor that can rotate around its central axis, A first stator is located opposite the rotor in the axial direction and on one side of the rotor in the axial direction, A second stator is located opposite the rotor in the axial direction and on the other side of the rotor in the axial direction, A first busbar connected to the first stator, A second busbar connected to the second stator, A first connector portion fixed to the first busbar, A second connector portion fixed to the second busbar, A housing that accommodates the rotor, the first stator, the second stator, the first busbar, and the second busbar, A first cable connected to the first connector and pulled out to the outside of the housing, The device comprises a second cable connected to the second connector and extended to the outside of the housing, The aforementioned housing includes, A first hole extending from the first connector portion toward one axial direction, A second hole is provided extending from the second connector portion toward one axial direction, The first cable is connected to the first connector portion from one axial side through the first hole, The second cable is connected to the second connector portion from one axial side through the second hole, The second connector portion is located radially outward of the second stator, The second hole extends from the second connector portion, through the radially outer side of the second stator and the first stator, to one axial side of the housing, in the motor.

2. The cable cover comprises a cable cover that surrounds at least one of the first cable or the second cable from the radially outer side with respect to the axis extending in the axial direction, The aforementioned cable cover is A base member fixed to the aforementioned housing, A cap member fixed to the base member, It has an annular first sealing member, The base member has a cylindrical threaded portion that surrounds the cable from the radially outer side of the axis and has a male threaded portion on its outer surface, The aforementioned cap member is The nut portion into which the aforementioned male thread portion is inserted, A cylindrical retaining cylinder that surrounds the aforementioned axis and extends from the nut portion to one side in the axial direction, The retaining cylinder portion has an annular inner projection that protrudes radially inward from one axial end of the cylinder portion, The first sealing member is located radially inside the retaining cylinder portion and is sandwiched between the cylindrical screw portion and the inner protrusion. The motor according to claim 1.

3. The base member has a flange portion that protrudes radially outward from the other end of the cylindrical screw portion on the axial side, A second sealing member is sandwiched between the flange portion and the surface of the housing facing one axial direction. The motor according to claim 2.

4. At least one of the first busbar or the second busbar has a plate-shaped connecting end with its thickness oriented axially, The aforementioned connecting end is provided with a through hole. At least one of the first connector portion or the second connector portion is A cylindrical portion inserted into the aforementioned through hole, The cylindrical portion has a flange portion that protrudes radially outward from the axial end, The aforementioned cylindrical portion is The female thread portion provided on the inner circumferential surface, It has a crimping portion that bulges radially outward and sandwiches the connecting end between itself and the flange portion, The motor according to claim 1, wherein at least one of the first cable or the second cable is provided with a screw-shaped terminal that is tightened into the female thread portion.

5. A conductive tape or conductive paste is interposed between the female thread portion and the terminal. The motor according to claim 4.

6. A plurality of busbars through which currents of different phases flow, Multiple connector parts, each fixed to a different busbar, Multiple cables connected to different connector sections, The insulator comprises a wall portion located between the connecting ends of the busbars which are different from each other, The motor according to claim 4.

7. A shaft fixed to the rotor and extending axially about the central axis, A bearing located on the other axial side of the rotor, which rotatably supports the shaft, The system includes a bearing cover fixed to the shaft and extending radially outward from the shaft, covering the bearing from the other axial side. The motor according to claim 1.

8. The housing has a cylindrical bearing holder portion that holds the bearing, The bearing holder portion is provided with an annular groove extending along the circumferential direction on the surface facing the other axial direction. The aforementioned bearing cover is A plate-shaped cover body with the axial direction as the thickness direction, An annular projection is provided that protrudes from the cover body in one axial direction and is inserted into the groove, The motor according to claim 7, further comprising: a cylindrical portion that protrudes radially outward from the cover body portion on one axial side from the radially outward side of the annular protrusion portion and surrounds the outer circumferential surface of the bearing holder portion from the radially outward side.

9. A rotor that can rotate around its central axis, A first stator is located opposite the rotor in the axial direction and on one side of the rotor in the axial direction, A first busbar connected to the first stator, A housing that accommodates the rotor, the first stator, and the first busbar, A first cable connected to the first busbar and routed to the outside of the housing, Equipped with, The first busbar has a plate-shaped first connecting end with its thickness oriented axially, The first cable is, A first cable body extending along the axial direction, The first cable has a plate-shaped first terminal plate located at its tip and extending along a plane perpendicular to the axial direction, The housing is provided with a first opening that exposes the first connecting end to one side in the axial direction. The first terminal plate is fastened to the first connecting end from one side in the axial direction through the first opening. Motor.

10. A second stator is located opposite the rotor in the axial direction and on the other side of the rotor in the axial direction, A second busbar connected to the second stator, A relay unit connected to the second busbar, The housing comprises a second cable connected to the relay section and pulled out to the outside of the housing, The housing accommodates the second stator, the second busbar, and the relay section. The second busbar has a plate-shaped second connecting end with its thickness oriented axially, The relay portion is fastened to the second connecting end at the other end on the axial side, and extends from the second connecting end through the radially outer side of the first stator and the second stator to one side on the axial side, The second cable is, A second cable body extending along the axial direction, The second cable has a plate-shaped second terminal plate located at its tip and extending along a plane perpendicular to the axial direction, The housing is provided with a second opening that exposes one axial end of the relay portion to the axial side. The second terminal plate is fastened from one axial side to one axial end of the relay portion through the second opening. The motor according to claim 9.

11. It comprises a relay section case made of insulating material that surrounds the relay section, The housing is provided with a relay section housing space for housing the relay section and the relay section case. The motor according to claim 10.

12. It is equipped with two cable covers made of insulating material, Each of the two cable covers covers the first opening or the second opening and includes a cable cover that surrounds at least one of the first cable or the second cable from the radially outward side with respect to the axis extending in the axial direction. The motor according to claim 10 or 11.

13. The aforementioned cable cover is A base member fixed to the aforementioned housing, A cap member fixed to the base member, It has an annular first sealing member, The base member has a cylindrical threaded portion that surrounds the cable from the radially outer side of the axis and has a male threaded portion on its outer surface, The aforementioned cap member is The nut portion into which the aforementioned male thread portion is inserted, A cylindrical retaining cylinder that surrounds the aforementioned axis and extends from the nut portion to one side in the axial direction, The retaining cylinder portion has an annular inner projection that protrudes radially inward from one axial end of the cylinder portion, The first sealing member is located radially inside the retaining cylinder portion and is sandwiched between the cylindrical screw portion and the inner protrusion. The motor according to claim 12.

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