JP6645600B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electric machine.

  In the motor described in Patent Literature 1 below, a winding end portion of a winding wound around a teeth portion extends to one side in the axial direction of the motor and is held by a winding holding portion. The winding end portion held by the winding holding portion is connected to a circuit terminal of the circuit device via a bus bar.

  By the way, generally, a copper wire having high conductivity is used for the winding. For example, by using a winding made of a metal containing aluminum as a main component, it is possible to reduce the weight and cost of the motor. Can be planned.

JP 2010-273450 A

  However, if the winding is made of a metal containing aluminum as a main component, the following concerns may be considered. That is, when the winding is coupled to a bus bar or a circuit terminal made of a metal different from the winding, there is a possibility that the coupling portion is corroded and a conduction failure occurs. On the other hand, by applying a sealing material or the like to this joint, it is possible to suppress the occurrence of corrosion at the joint, but there is a problem that the processing cost increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rotating electric machine capable of favorably conducting between a winding and a circuit terminal while suppressing an increase in cost even when the winding is formed of a metal containing aluminum as a main component.

  The rotating electric machine according to claim 1, wherein a cover that forms an outer shell of a closed circuit room, a drive circuit unit that is housed in the circuit room, and drives a motor unit, and is provided in the drive circuit unit in the circuit room. And a circuit terminal formed of a conductive metal different from aluminum, and wound around the teeth portion of the armature core in the motor portion, and formed of a metal containing aluminum as a main component and containing aluminum as a main component. A terminal portion is connected to the circuit terminal via a connecting member made of metal, and the circuit chamber is adjacent to the motor portion when viewed from the axial direction of the motor portion. The connecting member is connected to the circuit terminal and has a plurality of connecting portions connected to a terminal portion of the winding, and the motor is provided outside a frame portion of the cover. A bottomed recessed part that is open to one side in the axial direction is formed, and a slit is formed in each of the wall part of the frame part and the wall part of the concave part, and the connecting member is inserted into each of the slits. Have been.

  According to the rotating electric machine of the first aspect, the inside of the cover is a closed circuit chamber, and the drive circuit unit is housed in the circuit chamber. The drive circuit section is provided with circuit terminals, and the circuit terminals are arranged in a circuit room. The circuit terminal is made of a conductive metal different from aluminum.

  Here, the terminal part of the winding wound around the teeth part of the armature core in the motor part is connected to the circuit terminal via the connecting member, and the winding and the connecting member are made of metal mainly composed of aluminum. It is composed of Therefore, a circuit terminal made of a conductive metal different from aluminum and a connecting member made of a metal containing aluminum as a main component are connected in the circuit chamber. That is, the circuit terminal and the winding or the connecting member are connected in the circuit room where the waterproof property is ensured. As a result, the corrosion of the connection part of the circuit terminal with the connecting member is suppressed. This eliminates the need to apply a sealing material or the like for suppressing corrosion of the joint to the joint. Therefore, it is possible to favorably conduct between the winding and the circuit terminal while suppressing an increase in cost.

  Further, in this rotating electric machine, since the circuit room is disposed adjacent to the motor unit, for example, the influence of heat generated by the motor unit on the drive circuit unit can be suppressed, and the rotating electric machine can be controlled in the axial direction of the motor unit. Increase in size can be suppressed.

Furthermore, according to this rotating electric machine, for example, in an existing rotating electric machine having a connecting member, even if the winding is replaced with a metal mainly composed of aluminum, a connecting member coupled to the winding, a circuit terminal, Are connected in the circuit room, and good conduction between the circuit terminal and the winding can be achieved while suppressing an increase in cost. Further, for example, the drive circuit unit can be housed in the circuit room after the connection member and the circuit terminal are connected by welding. Accordingly, the connection member and the circuit terminal can be welded outside the circuit chamber, and therefore, an electrode space for welding the connection member and the circuit terminal can be easily secured. Furthermore, for example, after connecting the connecting member and the circuit terminal by welding, circuit components can be provided in the drive circuit unit. Thereby, the influence on circuit components due to spatter during welding can be suppressed.
Further, according to this rotating electric machine, since the connecting member has a plurality of connecting portions that are connected to the terminal portion of the winding, the connecting portion of the connecting member and the circuit terminal that are connected by dissimilar metals is connected. The number can be set smaller than the number of joints between the windings and the connecting members that are joined by the same kind of metal. Thereby, the reliability of the rotating electric machine can be improved.

  The rotating electric machine according to a second aspect is the rotating electric machine according to the first aspect, wherein the connecting member is formed integrally with the cover.

  According to the rotating electric machine according to the second aspect, since the connecting member is formed integrally with the cover, a waterproof structure of a portion of the cover through which the connecting member passes can be simplified.

  A rotating electric machine according to a third aspect is the rotating electric machine according to the first or second aspect, wherein the terminal portions of the plurality of windings are coupled to the coupling portion in a bundled state.

  In the rotating electric machine according to the third aspect, since the terminal portions of the plurality of windings are coupled to the coupling portion in a bundled state, the number of coupling portions between the terminal portions of the windings and the coupling portion can be reduced. This can contribute to a reduction in the number of assembly steps in the rotating electric machine.

  The rotating electric machine according to claim 4 is the rotating electric machine according to any one of claims 1 to 3, wherein the circuit terminal is made of a metal containing copper as a main component, and Tin plating is applied to a connection portion with the winding or the connection member.

  According to the rotating electric machine of the fourth aspect, the circuit terminal is made of a metal containing copper as a main component. Then, tin plating is applied to a portion of the circuit terminal connected to the winding or the connecting member. For this reason, the corrosion of the connection part with the winding or the connecting member in the circuit terminal can be effectively suppressed. That is, if the tin plating is omitted in the circuit terminal, the potential difference between the circuit terminal in which the tin plating is omitted and the winding or the connecting member is the same as the plating portion of the tin-plated circuit terminal. , The winding or the connecting member. Therefore, by applying tin plating to the circuit terminal, the potential difference between the plating portion of the circuit terminal and the winding or the connecting member is reduced, and the corrosion of the connecting portion of the circuit terminal with the winding or the connecting member is reduced. Can be effectively suppressed.

  A method of manufacturing a rotating electric machine according to claim 5 is applied to the rotating electric machine according to any one of claims 1 to 4, and includes a first coupling step of coupling the connection member and the circuit terminal. A sealing step of arranging the circuit terminal coupled to the connecting member in the drive circuit unit housed in the circuit chamber and sealing the circuit chamber.

  According to the method of manufacturing a rotating electric machine according to the fifth aspect, the circuit chamber is sealed after the connecting member and the circuit terminal are connected. For this reason, also in this case, for example, since the connection member and the circuit terminal can be welded outside the circuit room, an electrode space for welding the connection member and the circuit terminal can be easily secured. In addition, it is possible to suppress the effect of spatter on the circuit component when welding the connecting member and the circuit terminal.

FIG. 2 is a plan view showing a main part of the rotary electric machine according to the first embodiment, as viewed from one axial side of the rotary electric machine. FIG. 2 is a perspective view illustrating a main part of the rotating electric machine illustrated in FIG. 1. FIG. 3 is a side sectional view showing a main part of the rotating electric machine shown in FIG. 2. (A) is an explanatory view for explaining the first coupling step in the method for manufacturing the rotating electric machine shown in FIG. 1, and (B) is a diagram in which the first terminal and the second terminal shown in (A) are provided on a cover; It is an explanatory view for explaining the state formed in one. FIG. 5 is an explanatory diagram for explaining assembling of a bus bar to a motor body to which the circuit device shown in FIG. 4B is attached. FIG. 2 is a plan view showing another example of integration of the cover shown in FIG. 1 with a first terminal and a second terminal. It is a perspective view showing the important section of the rotary electric machine concerning a 2nd embodiment. FIG. 8 is an enlarged perspective view showing a circuit room of the rotating electric machine shown in FIG. 7. FIG. 13 is a plan view showing a main part of the rotating electric machine according to the third embodiment, as viewed from one axial side of the rotating electric machine. 10 is a side sectional view showing a circuit room of the rotating electric machine shown in FIG. 9. It is a side cross section which shows the other example of the circuit room shown in FIG.

(First Embodiment)

  Hereinafter, the rotating electric machine 10 according to the first embodiment will be described with reference to FIGS. 1 to 3. The rotating electric machine 10 is a so-called outer rotor type brushless motor, and includes a motor main body 12 as a “motor section” and a circuit device 50. Note that the first embodiment is a reference example.

  The motor main body 12 includes a centerpiece 14 having a substantially triangular plate shape, and the centerpiece 14 is arranged with the thickness direction set to the axial direction of the motor main body 12. The center piece 14 is formed symmetrically with respect to an orthogonal axis Cx (see FIG. 1) passing through the axis of the motor main body 12 when viewed from the axial direction of the motor main body 12. Further, an attachment portion 16 for attaching a circuit device 50 described later is formed at one end of the center piece 14 (the end in the direction of arrow D in FIG. 1 and the like). The mounting portion 16 extends in the axial direction of the orthogonal axis Cy orthogonal to the orthogonal axis Cx when viewed from the axial direction of the motor main body 12.

  As shown in FIG. 3, a shaft portion 18 is integrally formed at a substantially central portion of the center piece 14, and the shaft portion 18 is formed on one side in the axial direction of the motor main body 12 (arrows in FIG. 3 and the like). It is formed in a substantially bottomed cylindrical shape protruding to the A direction side). Then, one end of the motor shaft 20 is fitted into the shaft portion 18, and the motor shaft 20 is fixed to the center piece 14 so as not to rotate.

  Further, the motor main body 12 includes a rotor 22. The rotor 22 has a rotor housing 24, and the rotor housing 24 is formed in a substantially bottomed cylindrical shape opened to one axial side of the motor main body 12. A substantially cylindrical fixing portion 26 is formed at the center of the rotor housing 24, and the other end of the motor shaft 20 is supported by the fixing portion 26 via a bearing 28. Thereby, the rotor 22 is configured to be rotatable with respect to the motor shaft 20. Further, a magnet 30 is fixed to the inner peripheral surface of the rotor housing 24.

  Further, an armature core 34 of the stator 32 that constitutes a part of the motor main body 12 is accommodated inside the rotor housing 24, and the armature core 34 is supported by the center piece 14. The armature core 34 has a plurality of (twelve in the present embodiment) teeth portions 36, and the teeth portions 36 are formed radially around the motor shaft 20.

  A winding 38 is wound around the teeth portion 36. The winding 38 is made of a wire composed of a metal containing aluminum as a main component (1000s defined in the JIS standard), and constitutes the U phase, V phase, and W phase of the motor main body 12, respectively. I have. The winding 38 has twelve winding terminals 40 </ b> A to 40 </ b> L corresponding to the number of the teeth 36. As shown in FIGS. 1 and 2, the winding terminal portions 40 </ b> A to 40 </ b> L of the winding 38 extend from the motor body 12 to one axial side of the motor body 12 so as to form pairs. And are arranged at equal intervals (every 60 °) in the circumferential direction of the motor main body 12 when viewed from the axial direction of the motor main body 12. Specifically, two pairs of winding terminals 40A, 40B and winding terminals 40G, 40H are arranged on the orthogonal axis Cy when viewed from the axial direction of the motor body 12.

  A holding member 42 is provided on one axial side of the motor body 12, and the holding member 42 is supported by the center piece 14. The holding member 42 is made of an insulating material and is formed in a substantially concave shape having a shallow bottom and opened to one axial side of the motor body 12. Further, the holding member 42 is formed with a plurality of (six in the present embodiment) winding holding portions 44 for holding the winding terminal portions 40A to 40L, which form a pair every two winding terminals. The holding portions 44 are arranged at positions corresponding to the winding terminal portions 40A to 40L which make pairs each two. The winding holding section 44 is formed in a substantially cylindrical shape, and the winding terminal sections 40A to 40L each forming a pair are inserted into the winding holding section 44 and held.

  The circuit device 50 is disposed on one side in the axial direction of the motor main body 12, and is displaced toward the mounting portion 16 side of the center piece 14 when viewed from the axial direction of the motor main body 12. In other words, the circuit device 50 is disposed adjacent to the motor body 12 when viewed from the axial direction of the motor body 12. The circuit device 50 includes a substantially rectangular plate-shaped base portion 52 fixed to the mounting portion 16 of the center piece 14, and a cover 54 disposed on one axial side of the motor body 12 with respect to the base portion 52. It is composed of The cover 54 is formed in a substantially rectangular box shape that is open to the other axial side (the direction of the arrow B in FIG. 2) of the motor body 12. Specifically, the cover 54 includes a frame portion 54A formed in a substantially rectangular frame shape, and a bottom wall 54B closing one end of the frame portion 54A (in FIG. 2, the bottom wall 54B of the cover 54 is not illustrated for convenience). The frame portion 54A and the bottom wall 54B are fixed by means such as welding. The base portion 52 and the cover 54 are assembled with the space between the cover 54 and the base portion 52 sealed. The space inside the cover 54 is a circuit chamber 56, and the circuit chamber 56 is sealed by the base 52 and the cover 54. That is, the outer periphery of the circuit room 56 is constituted by the base portion 52 and the cover 54, and the waterproofness of the circuit room 56 is ensured.

  A circuit board 58 as a “circuit driving section” is housed in the circuit chamber 56, and the circuit board 58 is fixed to the base section 52. Further, the circuit board 58 is provided with a plurality of (three in this embodiment) circuit terminals 60A to 60C as “circuit terminals” at the end on the motor body 12 side. The circuit terminals 60A to 60C are made of a metal containing copper as a main component (in the present embodiment, brass), and the surfaces of the circuit terminals 60A to 60C are plated with tin. The circuit terminals 60 </ b> A to 60 </ b> C are formed in a substantially plate shape, are arranged so that the plate thickness direction is the axial direction of the orthogonal axis Cx, and protrude from the circuit board 58 to one axial side of the motor main body 12. Further, the circuit terminals 60A to 60C are arranged in a line in parallel with the orthogonal axis Cy. Further, a protrusion 62 (refer to a portion E in FIG. 1) protruding toward the motor body 12 is formed on the upper portion of the circuit terminals 60A to 60C. The first terminal 70 and the second terminal 90 are connected by welding.

  The circuit board 58 is connected to the winding terminals 40A to 40L of the winding 38 via a pair of first terminals 70, a pair of bus bars 80, and a second terminal 90. The first terminal 70, the bus bar 80, and the second terminal 90 are made of a metal containing aluminum as a main component (1000s defined in the JIS standard). Connection member ". Hereinafter, each configuration will be described.

  As shown in FIG. 2, the first terminals 70 are arranged on the motor body 12 side of the circuit terminals 60A and 60C (in the direction of arrow C in FIG. 2 and the like). The first terminal 70 is formed in a substantially elongated plate shape, and is disposed so that the longitudinal direction is the axial direction of the orthogonal axis Cx (see FIG. 1). The first terminal 70 includes a first terminal base 72 that constitutes a portion of the first terminal 70 on the side of the circuit terminals 60A and 60C (the direction of the arrow D in FIG. 2 and the like), and the motor terminal 12 side of the first terminal 70. And a first terminal connection part 74 that constitutes the part. The first terminal 70 is formed integrally with the side wall (frame portion 54A) of the cover 54 on the side of the motor main body 12 by insert molding at an intermediate portion in the longitudinal direction. Thus, the first terminal base 72 extends from the side wall (frame 54A) of the cover 54 into the circuit chamber 56, and the first terminal connection part 74 extends from the side wall (frame 54A) of the cover 54 to the motor body 12 side. Extending.

  The first terminal base 72 is disposed with the plate thickness direction being the axial direction of the motor main body 12. Further, one end of the first terminal base 72 (the end on the side of the circuit terminals 60A and 60C) is bent toward one axial side of the motor main body 12 so as to face (the protrusion 62 of) the circuit terminals 60A and 60C. And are connected to the circuit terminals 60A and 60C by projection welding or the like. That is, in the circuit room 56, the first terminal 70 is connected to the circuit terminals 60A and 60C.

  The first terminal connection part 74 is arranged with the plate thickness direction being the axial direction of the orthogonal axis Cy (see FIG. 1), and extends from one end in the width direction at the other end of the first terminal base 72 to the motor body 12 side. ing. The first terminal connection portion 74 is formed in a substantially L-shape with its tip end protruding toward one axial side of the motor main body 12 in a side view.

  The pair of bus bars 80 are arranged on the first terminal 70 on the side opposite to the circuit device 50. The bus bar 80 is configured to include a bus bar connecting portion 82 and a bus bar connecting portion 84 as a pair of “connecting portions”. The bus bar connecting portions 82 of the pair of bus bars 80 are formed in a substantially elongated plate shape, and are bent stepwise so as to be bilaterally symmetric with respect to the orthogonal axis Cx when viewed from the axial direction of the motor main body 12. (See FIG. 1). Specifically, one end (the end on the circuit device 50 side) of the bus bar connection portion 82 is arranged with the plate thickness direction being the axial direction of the orthogonal axis Cy, and TIG welding is performed on the other end of the first terminal 70. And so on. Then, as viewed from the axial direction of the motor main body 12, the longitudinal middle portion of the bus bar connecting portion 82 approaches the orthogonal axis Cx as it goes to the opposite side (the direction of arrow C in FIG. 1 and the like) from the circuit device 50. It is formed in a substantially crank shape (see FIG. 1). Further, the other end (the end opposite to the circuit device 50) of the bus bar connection portion 82 is arranged with the plate thickness direction being the axial direction of the orthogonal axis Cy.

  The bus bar coupling portions 84 are formed integrally with the longitudinal middle portions of the pair of bus bar connection portions 82 and the other end portions of the bus bar connection portions 82, respectively, and are paired with the winding terminal portions 40A, 40B, respectively. The wire end portions 40C and 40D, the winding end portions 40E and 40F, and the winding end portions 40G and 40H are respectively disposed at positions adjacent to the wire end portions 40C and 40D. The busbar connecting portion 84 extends from the busbar connecting portion 82 to one side in the axial direction of the motor main body 12 and is bent into a substantially U-shape opened to the opposite side to the circuit device 50 when viewed from the axial direction of the motor main body 12. Have been. The bus bar connecting portion is formed in such a manner that the winding terminal portions 40A and 40B, the winding terminal portions 40C and 40D, the winding terminal portions 40E and 40F, and the winding terminal portions 40G and 40H, which form pairs each, are bundled. It is inserted into the bus bar 84 and connected to the bus bar connecting portion 84 by TIG welding or the like. As a result, the circuit terminal 60A and the winding terminals 40A, 40B and the winding terminals 40C, 40D are connected (coupled) by the first terminal 70 and the bus bar 80, and the circuit terminal 60C and the winding terminals are connected. The terminals 40E and 40F and the winding terminals 40G and 40H are connected (coupled).

  The second terminal 90 is arranged on the motor body 12 side of the circuit terminal 60B, and is formed in a substantially Y-shaped plate shape when viewed from the axial direction of the motor body 12. The second terminal 90 includes a second terminal base 92 forming a portion of the second terminal 90 on the circuit terminal 60B side and a pair of second terminal connecting portions forming a portion of the second terminal 90 on the motor body 12 side. 94. Further, the second terminal 90 is formed integrally with the side wall (frame portion 54A) of the cover 54 on the side of the motor body 12 by insert molding, and the second terminal base 92 is connected to the side wall (frame portion 54A) of the cover 54 by a circuit. While extending into the chamber 56, a pair of second terminal connection portions 94 extend from the side wall (frame portion 54A) of the cover 54 toward the motor main body 12.

  The second terminal base 92 is formed in a substantially T-shaped plate shape when viewed from the axial direction of the motor main body 12, and is arranged with the plate thickness direction being the axial direction of the motor main body 12. Specifically, the second terminal base 92 extends from the circuit terminal 60B toward the motor main body 12, and is branched into two branches in the axial direction of the orthogonal axis Cy at the end on the motor main body 12 side. Then, one end of the second terminal base 92 (the end on the side of the circuit terminal 60B) is bent to one side in the axial direction of the motor body 12 so as to face the circuit terminal 60B, and is connected to the circuit terminal 60B by projection welding or the like. Are combined. That is, the second terminal 90 and the circuit terminal 60B are coupled in the circuit device 50.

  The pair of second terminal connecting portions 94 are arranged with the plate thickness direction being the axial direction of the orthogonal axis Cy, and extend toward the motor body 12 from both branched ends of the second terminal base 92. Further, a second terminal connecting portion 96 as a “connecting portion” is integrally formed at a distal end portion (an end portion on the side of the motor main body 12) of the second terminal connecting portion 94. It extends from the tip to one side in the axial direction of the motor main body 12 and is bent into a substantially U-shape that is open to the opposite side to the circuit device 50 when viewed from the axial direction of the motor main body 12. Then, the winding terminal portions 40I, 40J and the winding terminal portions 40K, 40L each forming a pair are inserted into the second terminal coupling portion 96 in a state of being bundled, respectively. They are joined by TIG welding or the like. Thus, the winding terminals 40I and 40J and the winding terminals 40K and 40L are connected (coupled) to the circuit terminal 60B via the second terminal 90.

  Next, a method for manufacturing the rotating electric machine 10 according to the first embodiment will be described.

  First, as shown in FIG. 4A, one end of the first terminal base 72 in the first terminal 70 and the protrusions 62 (not shown in FIG. 4A) of the circuit terminals 60A and 60C are connected. The first terminal 70 and the circuit terminals 60A and 60C are connected to each other by projection welding or the like (first connecting step). Further, one end of the second terminal base 92 of the second terminal 90 and the projection 62 (not shown in FIG. 4A) of the circuit terminal 60B are arranged so as to face each other, and the second terminal 90 is formed by projection welding or the like. The second terminal 90 and the circuit terminal 60B are connected (first connection step).

  Next, a pair of first terminals 70 connected to each of the circuit terminals 60A and 60C and a second terminal 90 connected to the circuit terminal 60B are integrally formed with the (the frame portion 54A of) the cover 54 by insert molding. (Forming step).

  Next, as shown in FIG. 4B, the frame 54A of the cover 54 is arranged on the base 52 so as to cover the circuit board 58 fixed to the base 52 of the circuit device 50. Then, the frame 54A of the cover 54 is attached to the base 52 while sealing the space between the cover 54 and the base 52. At this time, the terminal portions (not shown) of the circuit terminals 60A to 60C are inserted into through holes (not shown) formed in the circuit board 58, and the circuit terminals 60A to 60C are soldered to the circuit board 58.

  Then, the bottom wall 54B of the cover 54 is arranged so as to close one end of the frame 54A of the cover 54 (the side opposite to the base 52), and the cover 54 is fixed to the frame 54A. Thus, the circuit device 50 is unitized while the circuit chamber 56 is sealed (sealing step).

  As shown in FIG. 5, the circuit device 50 in this state is arranged on the side of the motor main body 12, and the base portion 52 of the circuit device 50 is fixed to the mounting portion 16 of the center piece 14. At this time, the winding terminal portions 40I and 40J and the winding terminal portions 40K and 40L, which form two pairs, are inserted into the second terminal coupling portion 96 of the second terminal 90 in a bundled state. Then, the winding terminal portions 40I, 40J and the winding terminal portions 40K, 40L and the second terminal connection portion 96 are connected by TIG welding or the like (second connection step). Thus, the winding terminals 40I and 40J and the winding terminals 40K and 40L are connected (coupled) to the circuit terminal 60B via the second terminal 90.

  Further, a pair of busbars 80 are attached to the motor main body 12 from one axial side of the motor main body 12. Specifically, two pairs of the winding terminal portions 40A, 40B and the winding terminal portions 40C, 40D are inserted into the bus bar coupling portion 84 of one bus bar 80, and the winding terminal portions 40A, 40B are formed. Then, the winding end portions 40C, 40D and the bus bar connecting portion 84 are connected by TIG welding or the like (second connecting step). Also, two pairs of winding terminal portions 40E, 40F and winding terminal portions 40G, 40H are inserted into the bus bar coupling portion 84 of the other bus bar 80, so that the winding terminal portions 40E, 40F and the winding terminal The terminal portions 40G, 40H and the bus bar connecting portion 84 are connected by TIG welding or the like (second connecting step). Further, the bus bar connecting portion 82 of the bus bar 80 and the first terminal 70 are connected by TIG welding or the like. As a result, the circuit terminal 60A and the winding terminals 40A, 40B and the winding terminals 40C, 40D are connected (coupled) by the first terminal 70 and the bus bar 80, and the circuit terminal 60C and the winding terminals are connected. The terminals 40E and 40F and the winding terminals 40G and 40H are connected (coupled).

  Next, the operation and effect of the present embodiment will be described.

  In the rotating electric machine 10 configured as described above, the circuit board 58 is accommodated in the circuit chamber 56, and the circuit board 58 is provided with circuit terminals 60A to 60C made of brass. The winding 38, the pair of first terminals 70, the pair of bus bars 80, and the second terminals 90 of the motor body 12 are each made of a metal containing aluminum as a main component.

  Here, the winding terminal portions 40A to 40L of the winding 38 in the motor main body 12 are coupled to the circuit terminals 60A to 60C via a pair of bus bars 80, a pair of first terminals 70, and a second terminal 90. I have. Specifically, two pairs of the winding terminal portions 40A and 40B, the winding terminal portions 40C and 40D, the winding terminal portions 40E and 40F, and the winding terminal portions 40G and 40H are connected to the bus bar coupling portion of the bus bar 80. The bus bar 80 is connected to the first terminal 70. The first terminal 70 and the circuit terminals 60A and 60C are connected in the circuit chamber 56. Further, two pairs of the winding terminal portions 40I and 40J and the winding terminal portions 40K and 40L are connected to the second terminal connecting portion 96 of the second terminal 90, and the second terminal 90 and the circuit terminal 60B are connected. Are connected in the circuit chamber 56.

  Therefore, the circuit terminals 60A to 60C made of a conductive metal (brass) different from aluminum, and the first terminal 70 and the second terminal 90 made of a metal containing aluminum as a main component are waterproof. It is connected in the (high) circuit chamber 56 where the property is secured. As a result, the corrosion of the connection portions of the circuit terminals 60A to 60C with the first terminal 70 and the second terminal 90 is suppressed. Thus, for example, it is not necessary to apply a sealing material or the like for suppressing corrosion of the connection portion. Therefore, even when the winding 38 is made of a metal containing aluminum as a main component, good conduction between the circuit terminals 60A to 60C and the winding 38 can be achieved while suppressing an increase in cost.

  Further, as described above, the winding terminal portions 40A to 40L are coupled to the circuit terminals 60A to 60C via the coupling members (the pair of first terminals 70, the pair of bus bars 80, and the second terminals 90). . For this reason, for example, even in a case where the winding is replaced with a metal mainly composed of aluminum in an existing rotating electric machine having a connecting member, by configuring the rotating electric machine like the rotating electric machine 10 of the present embodiment. Thus, it is possible to satisfactorily conduct between the circuit terminal and the winding while suppressing an increase in cost.

  Further, in the second terminal 90, one end is coupled to the circuit terminal 60B, and the second terminal coupling portions coupled to the winding terminal portions 40I and 40J and the winding terminal portions 40K and 40L, which form a pair each. 96 are formed at two places. In the bus bar 80, one end is connected to the first terminal 70, and two pairs of the winding terminals 40A and 40B and the winding terminals 40C and 40D (the winding terminals 40E and 40F and the winding terminals 40E and 40F) are formed in pairs. The bus bar connecting portions 84 connected to the line terminals 40G and 40H) are formed at two places. For this reason, the connecting points (three places) between the first terminals 70 and the second terminals 90 and the circuit terminals 60A to 60C are connected to the connecting points (six places) between the bus bar 80 and the second terminals 90 and the winding terminals 40A to 40L. ). Thereby, the number of connecting portions between different kinds of metals (the connecting portions between the first terminal 70 and the second terminal 90 and the circuit terminals 60A to 60C) can be reduced, so that the reliability of the rotating electric machine 10 can be improved.

  Further, the first terminal 70 and the second terminal 90 are formed integrally with the cover 54 by insert molding. Therefore, the waterproof structure of the portion of the cover 54 where the first terminal 70 and the second terminal 90 pass can be simplified.

  Further, the surfaces of the circuit terminals 60A to 60C are plated with tin. Therefore, it is possible to effectively suppress the corrosion of the connection portions of the circuit terminals 60A to 60C with the connecting members (the first terminal 70 and the second terminal 90). That is, if tin plating is omitted in the circuit terminals 60A to 60C, the potential difference (about 0.5 V) between the circuit terminals 60A to 60C where the tin plating is omitted and the connecting member is applied with tin plating. The potential difference between the plated portions of the circuit terminals 60A to 60C and the connecting member (approximately 0.25 V). Therefore, by applying tin plating to the circuit terminals 60A to 60C, it is possible to set a small potential difference at a portion where the circuit terminals 60A to 60C are connected to the connecting members (the first terminal 70 and the second terminal 90). Thereby, the corrosion of the connection part with the connecting member in the circuit terminals 60A to 60C can be effectively suppressed.

  Further, the circuit device 50 is disposed adjacent to the motor body 12 when viewed from the axial direction of the motor body 12. Therefore, the influence of the heat generated by the motor main body 12 on the circuit board 58 can be suppressed, and the size of the rotary electric machine 10 in the axial direction of the motor main body 12 can be suppressed.

  Further, the first terminal 70 is connected between the winding terminal portions 40A, 40B (40E, 40F) and the winding terminal portions 40C, 40D (40G, 40H) and the circuit terminal 60A (60C), which make pairs each. The bus bar 80 is configured to be divided. Therefore, for example, the amount of protrusion of the first terminal 70 from the cover 54 can be suppressed as compared with the case where the first terminal 70 and the bus bar 80 are integrally formed. Thus, the size of the cover 54 can be suppressed, and the assemblability when the circuit device 50 is assembled to the motor body 12 can be improved.

  In addition, the winding terminal portions 40A and 40B, the winding terminal portions 40C and 40D, the winding terminal portions 40E and 40F, and the winding terminal portions 40G and 40H, which form a pair each, are bundled, and It is connected to the bus bar connecting portion 84. Further, the winding terminal portions 40I, 40J and the winding terminal portions 40K, 40L, which form a pair each two, are coupled to the second terminal coupling portion 96 of the second terminal 90 in a bundled state. Therefore, the number of connection points between the winding terminal portions 40A to 40L, the bus bar 80, and the second terminal 90 can be reduced. This can contribute to a reduction in the number of assembling steps of the rotating electric machine 10.

  Further, in the rotating electric machine 10, the first terminal 70 and the circuit terminals 60A and 60C are connected by welding, the second terminal 90 and the circuit terminal 60B are connected by welding, and then the first terminal 70 and the second terminal 70 are inserted by insert molding. A terminal 90 is formed integrally with the cover 54. Therefore, since the first terminal 70 and the second terminal 90 and the circuit terminals 60A to 60C can be welded outside the circuit chamber 56, the first terminal 70 and the second terminal 90 can be welded to the circuit terminals 60A to 60C. Electrode space can be easily secured. Further, circuit terminals 60A to 60C welded to the first terminal 70 and the second terminal 90 can be provided on the circuit board 58. Thereby, the influence of the spatter on the circuit components on the circuit board 58 at the time of welding them can be suppressed.

  Further, in the first embodiment, after the first terminal 70 is connected to the circuit terminals 60A and 60C, and the second terminal 90 is connected to the circuit terminal 60B, the winding terminals 40A to 40L and the bus bar 80 are connected. And the second terminal 90. Thereby, the assemblability of the rotating electric machine 10 can be improved. That is, if the winding terminals 40A to 40L are connected to the bus bar 80 and the second terminal 90, and then the first terminal 70 and the second terminal 90 are connected to the circuit terminals 60A to 60C, the first terminal 70 In addition, there is a problem that the first terminal 70 and the second terminal 90 and the circuit terminals 60A to 60C must be connected (welded) with the motor main body 12 connected to the second terminal 90. Further, in this state, the first terminal 70 and the second terminal 90 and the cover 54 are integrally formed, and there is a problem that the moldability is deteriorated. On the other hand, in the first embodiment, after the first terminal 70 and the second terminal 90 are connected to the circuit terminals 60A and 60C, the winding terminals 40A to 40L, the bus bar 80 and the second terminal 90 are connected. The above-mentioned problem is solved, and the assemblability of the rotating electric machine 10 can be improved.

  In the first embodiment, the first terminal 70 and the second terminal 90 are integrally formed on the cover 54 by insert molding. Alternatively, the first terminal 70 and the second terminal 90 may be integrated with the cover 54 by attaching the first terminal 70 and the second terminal 90 to the cover 54 via a sealing material, for example. Specifically, as shown in FIG. 6, a bottomed concave portion 55 that is open to one axial side of the motor body 12 is formed outside the frame portion 54 </ b> A of the cover 54. A slit 57 into which the first terminal 70 and the second terminal 90 are inserted is formed in the side wall of the frame portion 54A and the side wall of the concave portion 55, and the first terminal 70 and the second terminal 90 are inserted into the slit 57. Assemble with Then, the circuit chamber 56 is sealed by filling the inside of the concave portion 55 and the slit 57 with the sealing material S.

  Also in this case, for example, the circuit board 58 can be housed in the circuit chamber 56 after the first terminal 70 and the second terminal 90 are connected to the circuit terminals 60A to 60C by welding. Thereby, similarly to the above, since the first terminal 70 and the second terminal 90 and the circuit terminals 60A to 60C can be welded outside the circuit chamber 56, the first terminal 70 and the second terminal 90 and the circuit terminals 60A to 60C can be welded. Can easily secure an electrode space when welding. In this case, the first terminal 70 and the second terminal 90 connected to the circuit terminals 60A to 60C can be integrated with the cover 54, and then the circuit terminals 60A to 60C can be arranged on the circuit board 58. Alternatively, the circuit terminals 60A to 60C coupled to the first terminal 70 and the second terminal 90 may be disposed on the circuit board 58, and then the first terminal 70 and the second terminal 90 may be integrated with the cover 54. . Thereby, also in this case, the influence on the circuit components due to the spatter during welding can be suppressed.

  Further, in the first embodiment, the first terminal 70 and the bus bar 80 are configured separately, but the first terminal 70 and the bus bar 80 may be integrally formed and configured as one member. Good.

  Further, in the first embodiment, the two windings 38 are joined by TIG welding at the bus bar joining section 84 and the second terminal joining section 96. The number of windings 38 coupled to the coupling portion 84 and the second terminal coupling portion 96 may be arbitrarily set. Further, the numbers of the bus bar connecting portions 84 and the second terminal connecting portions 96 may be arbitrarily set.

(Second embodiment)

  Hereinafter, the rotating electric machine 100 according to the second embodiment will be described with reference to FIGS. 7 and 8. This second embodiment is a reference example. The rotating electric machine 100 according to the second embodiment differs from the rotating electric machine 10 according to the first embodiment in the following points in connection between the winding 38 and the circuit terminals 60A to 60C.

  That is, in the rotary electric machine 100 according to the second embodiment, the cover 54 is provided on one axial side of the motor body 12 of the centerpiece 14, and the circuit chamber 56 is formed by the centerpiece 14 and the cover 54. ing. That is, the circuit board 58 is disposed on one axial side of the motor body 12. In FIG. 7, in order to illustrate the circuit chamber 56, a part of the bottom wall of the cover 54 is opened.

  Also, six winding terminal portions 40A to 40F extend from the motor body 12, and the winding terminal portions 40A to 40F are inserted into the circuit board 58 in pairs at a time. A guide 102 is provided in a portion of the winding terminal portions 40A to 40F through which the circuit board 58 is inserted, and the winding terminal portions 40A to 40F are moved from the circuit board 58 to the motor body 12 while being held by the guide 102. It protrudes to one side in the axial direction.

  Further, in the second embodiment, the pair of first terminals 70, the pair of bus bars 80, and the second terminals 90 of the first embodiment are omitted. The circuit terminals 60A to 60C are formed in a substantially plate shape, and are arranged adjacent to the winding terminal portions 40A to 40F with the plate thickness direction being a radial direction with the motor shaft 20 as a center. A circuit terminal connecting portion 104 is formed at an axially intermediate portion of the motor body 12 of the circuit terminals 60A to 60C, and the circuit terminal connecting portion 104 has a substantially cross-sectional shape protruding toward the winding terminal portions 40A to 40F. It is formed in an arc shape. The winding terminal portions 40A to 40F are connected to the circuit terminal connecting portions 104 of the circuit terminals 60A to 60C by projection welding or the like. Thus, in the circuit chamber 56, the winding terminal portions 40A to 40F of the winding 38 made of a metal mainly containing aluminum and the circuit terminals 60A to 60C made of a metal mainly containing copper are provided. , Are combined. As a result, for example, corrosion of the connection portions can be suppressed without applying a sealing material or the like to the connection portions between the circuit terminals 60A to 60C and the winding terminal portions 40A to 40F. Therefore, even in the second embodiment, even when the winding 38 is made of a metal containing aluminum as a main component, good conduction between the winding 38 and the circuit terminals 60A to 60C can be achieved while suppressing an increase in cost. it can.

  In the second embodiment, the winding terminal portions 40A to 40F of the winding 38 extend from the motor main body 12 into the circuit chamber 56, and the winding terminal portions 40A to 40F are directly connected to the circuit terminals 60A to 60C. Are combined. Therefore, it is not necessary to couple the windings 38 outside the circuit chamber 56, so that the cost of the rotating electric machine 100 can be reduced.

  Further, a guide 102 is provided at a portion of the winding terminal portions 40A to 40F through which the circuit board 58 is inserted, and the winding terminal portions 40A to 40F are held by the guide 102. Thereby, the winding terminal portions 40A to 40F can be favorably drawn into the circuit chamber 56, and the winding terminal portions 40A to 40F can be stably welded to the circuit terminal coupling portion 104.

(Third embodiment)

  Hereinafter, a rotating electric machine 200 according to the third embodiment will be described with reference to FIGS. 9 and 10. This third embodiment is a reference example. The rotating electric machine 200 according to the third embodiment has the same configuration as the rotating electric machine 10 according to the first embodiment except for the following points.

  That is, in the third embodiment, the circuit cover 202 and the joint terminal cover 204 are provided inside the cover 54, and the circuit chamber 56 is divided into two regions by the circuit cover 202 and the joint terminal cover 204. .

  The circuit cover 202 is formed in a substantially box-like shape opened to the base portion 52 side, and is disposed in a portion of the circuit chamber 56 opposite to the motor main body 12 (the direction of the arrow D in FIG. 9). I have. A region defined by the circuit cover 202 in the circuit room 56 is a substrate housing room 206, and the circuit board 58 (see FIG. 10) is housed in the substrate housing room 206.

  The joining terminal cover 204 is formed in a substantially box shape opened to the base portion 52 side, and is disposed adjacent to the circuit cover 202 on the motor body 12 side (the direction of the arrow C in FIG. 9) of the circuit cover 202. Have been. A region defined by the circuit cover 202 in the circuit room 56 is a terminal connection room 208. In FIG. 9, a part of the bottom wall of the cover 54 and a part of the bottom wall of the joint terminal cover 204 are not shown for convenience of description.

  The cover 54 is made of a resin material. Inside the cover 54, the circuit cover 202 and the joint terminal cover 204 are formed integrally with the cover 54 (insert molding). Thus, the inside of the substrate housing chamber 206 and the inside of the terminal connection chamber 208 are sealed, and the waterproofness of the substrate storage chamber 206 and the terminal connection chamber 208 is ensured.

  Further, the circuit terminals 60A to 60C are formed in a substantially long plate shape, and are bent in a substantially crank shape when viewed from the axial direction of the orthogonal axis Cy (see FIG. 10). The intermediate portions of the circuit terminals 60A to 60C in the longitudinal direction pass through the adjacent side walls of the circuit cover 202 and the joint terminal cover 204 with the plate thickness direction being the axial direction of the motor main body 12. In other words, the intermediate portions in the longitudinal direction of the circuit terminals 60A to 60C are arranged so as to protrude from the mutually adjacent side walls of the circuit cover 202 and the joint terminal cover 204 toward the substrate housing chamber 206 and the terminal coupling chamber 208. . One ends of the circuit terminals 60A to 60C in the longitudinal direction are bent toward the circuit board 58 (the direction of the arrow B in FIG. 10) and connected to the circuit board 58. The other ends of the circuit terminals 60 </ b> A to 60 </ b> C in the longitudinal direction are bent toward one axial side of the motor main body 12 (in the direction of the arrow A in FIG. 10) and arranged in the terminal coupling chamber 208. The projecting portions 62 of the circuit terminals 60A to 60C protrude from the other longitudinal ends of the circuit terminals 60A to 60C toward the motor body 12. Note that, for example, cutouts and the like through which the circuit terminals 60A to 60C pass are formed on the side walls of the circuit cover 202 and the joint terminal cover 204, and are sealed with a sealing material or the like.

  On the other hand, the first terminal 70 and the second terminal 90 pass through the side wall of the cover 54 and the joint terminal cover 204 on the motor body 12 side, and one end of each of the first terminal 70 and the second terminal 90 is connected to the terminal coupling chamber. 208. Note that the first terminal 70 and the second terminal 90 are assembled to the cover 54 via a sealing material. In the terminal connection chamber 208, the first terminal 70 and the circuit terminals 60A and 60C are connected, and the second terminal 90 and the circuit terminal 60B are connected.

  Thus, also in the third embodiment, the circuit terminals 60A to 60C made of a conductive metal (brass) different from aluminum, the first terminals 70 made of a metal mainly containing aluminum, The second terminal 90 is connected in the (high) terminal connection chamber 208 in which waterproofness is ensured. Therefore, also in the third embodiment, the same operation and effect as in the first embodiment can be obtained.

  In the third embodiment, the circuit cover 202 and the joint terminal cover 204 are formed integrally with the cover 54 inside the cover 54, and the circuit room 56 is divided into the substrate housing room 206 and the terminal connection room 208. Have been. Instead of this, as shown in FIG. 11, by omitting the joining terminal cover 204 and integrally forming the cover 54 and the circuit cover 202, the circuit room 56 is formed into the substrate housing room 206 and the terminal connection room 208. And may be partitioned.

  Further, in the first to third embodiments, a maze structure (a so-called labyrinth structure) may be provided on the inner peripheral portion of the cover 54 so as to further improve the waterproof performance of the circuit chamber 56.

DESCRIPTION OF SYMBOLS 10 ... rotating electric machine, 12 ... motor body (motor part), 34 ... armature core, 36 ... teeth part, 38 ... winding, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H, 40I, 40J, 40K, 40L, 40L: Winding terminal, 54: Cover, 56: Circuit room, 58: Circuit board (drive circuit), 60A, 60B, 60C: circuit terminal (circuit terminal), 70: first terminal (connecting member), 80: bus bar (connecting member), 84: bus bar connecting portion (connecting portion), 90 ... -2nd terminal (connection member), 96 ... 2nd terminal connection part (connection part), 100 ... rotary electric machine, 200 ... rotary electric machine

Claims (5)

A cover constituting an outer shell of a closed circuit room,
A drive circuit unit that is housed in the circuit chamber and drives a motor unit;
A circuit terminal provided in the drive circuit unit in the circuit chamber, and made of a conductive metal different from aluminum;
The terminal portion is wound around the teeth portion of the armature core in the motor portion, and is formed of a metal containing aluminum as a main component. And a winding coupled with
With
When viewed from the axial direction of the motor unit, the circuit chamber is disposed adjacent to the motor unit,
The coupling member is coupled to the circuit terminal and has a plurality of coupling portions coupled to a terminal portion of the winding,
Outside the frame portion of the cover, a bottomed concave portion opened to one side in the axial direction of the motor portion is formed,
A rotating electric machine in which a slit is formed in each of a wall portion of the frame portion and a wall portion of the concave portion, and the connecting member is inserted into each of the slits.   The rotating electric machine according to claim 1, wherein the connection member is formed integrally with the cover.   3. The rotating electric machine according to claim 1, wherein terminal portions of the plurality of windings are coupled to the coupling portion in a bundled state. 4.   4. The circuit terminal according to claim 1, wherein the circuit terminal is formed of a metal containing copper as a main component, and a portion of the circuit terminal connected to the winding or the connection member is plated with tin. 5. 2. The rotating electric machine according to claim 1. Applied to the rotating electric machine according to any one of claims 1 to 4,
A first coupling step of coupling the connection member and the circuit terminal;
A sealing step of arranging the circuit terminal coupled to the connection member in the drive circuit unit housed in the circuit chamber, and sealing the circuit chamber;
The manufacturing method of the rotary electric machine provided with.