WO2023203876A1 - 電機子及び回転電機 - Google Patents
電機子及び回転電機 Download PDFInfo
- Publication number
- WO2023203876A1 WO2023203876A1 PCT/JP2023/006884 JP2023006884W WO2023203876A1 WO 2023203876 A1 WO2023203876 A1 WO 2023203876A1 JP 2023006884 W JP2023006884 W JP 2023006884W WO 2023203876 A1 WO2023203876 A1 WO 2023203876A1
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- WIPO (PCT)
- Prior art keywords
- terminal
- insulator
- power supply
- connection part
- supply side
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/12—Machines characterised by the bobbins for supporting the windings
Definitions
- the present disclosure relates to an armature and a rotating electric machine.
- Patent Document 1 discloses a rotating electric machine that is an inner rotor type brushless motor.
- the rotating electric machine described in this document includes a plurality of stator magnetic poles to which coils are attached, and a plurality of conductive members.
- the plurality of conductive members and the coil ends of the plurality of coils are electrically connected at the plurality of connection portions. Further, these connecting portions are arranged in the interpolar gaps between the stator magnetic poles. This makes it possible to downsize the rotating electrical machine in the axial direction.
- An object of the present disclosure is to obtain an armature and a rotating electric machine that can ensure durability against vibration.
- the armature includes an armature core having a plurality of teeth arranged at intervals in a circumferential direction, an insulator attached to the armature core, and a conductive winding. a plurality of coils formed by winding them around the plurality of teeth, an insulator fixing part formed using a conductive member and fixed to the insulator, and a first connection part that extends and has a caulked part to which the terminal end of the coil is fixed; and a power supply side connection part that extends from the insulator fixing part or the first connection part and is connected to the power supply side. and a second connection part having a stress concentration part where stress is concentrated when the power supply side connection part is connected to the power supply side.
- the rotating electrical machine includes one of a stator and a rotor that includes the armature, and the other of the stator and rotor that includes a magnet that is arranged radially opposite to the armature. We are prepared.
- FIG. 1 is a schematic diagram of the motor of the first embodiment viewed from the axial direction
- FIG. 2 is a perspective view showing the stator
- FIG. 3 is a plan view showing the stator
- FIG. 4 is an enlarged plan view showing an enlarged portion of the stator where the first terminal is provided
- FIG. 5 is a perspective view of the first terminal viewed from one side in the circumferential direction
- FIG. 6 is a perspective view of the first terminal viewed from the inside in the radial direction
- FIG. 1 is a schematic diagram of the motor of the first embodiment viewed from the axial direction
- FIG. 2 is a perspective view showing the stator
- FIG. 3 is a plan view showing the stator
- FIG. 4 is an enlarged plan view showing an enlarged portion of the stator where the first terminal is provided
- FIG. 5 is a perspective view of the first terminal viewed from one side in the circumferential direction
- FIG. 6 is a perspective view of the first terminal viewed from the inside in the radial direction
- FIG. 7 is a perspective view showing a cross section of the stator taken along the axial and radial directions at a portion corresponding to the first terminal;
- FIG. 8 is a perspective view showing the second terminal,
- FIG. 9 is a side view of the second terminal viewed from the inside in the radial direction;
- FIG. 10 is a perspective view of the first terminal of the motor of the second embodiment viewed from the other side in the circumferential direction;
- FIG. 11 is a perspective view of the first terminal of the motor of the third embodiment viewed from the other side in the circumferential direction;
- FIG. 12 is a perspective view of the first terminal of the motor of the fourth embodiment viewed from the other side in the circumferential direction;
- FIG. 13 is a perspective view of the first terminal of the motor of the fifth embodiment viewed from the other side in the circumferential direction.
- FIGS. 1 to 9 A motor 10 according to a first embodiment of the present disclosure will be described using FIGS. 1 to 9.
- arrow Z direction, arrow R direction, and arrow C direction appropriately shown in the drawings indicate one side in the rotational axis direction, the outer side in the rotational radial direction, and one side in the rotational circumferential direction of the rotor 12, which will be described later.
- the rotational axis direction, rotational radial direction, and rotational circumferential direction of the rotor 12 are meant.
- the motor 10 of this embodiment and the motors of each embodiment described later are examples of rotating electric machines.
- the motor 10 of this embodiment is an inner rotor type brushless motor.
- This motor 10 includes a stator 14 serving as an armature and a stator, and a rotor 12 serving as a rotor disposed inside the stator 14 in the radial direction.
- the rotor 12 includes a rotor core 16 fixed to a rotating shaft (not shown) and a magnet 18 fixed to a radially outer surface of the rotor core 16.
- the magnet 18 is, for example, a ring magnet formed in an annular shape. In this magnet 18, portions having a north pole on the outside in the radial direction and portions having the south pole on the outside in the radial direction are alternately arranged along the circumferential direction. Note that a plurality of magnets 18 may be fixed to the radially outer surface of the rotor core 16. In this configuration, the magnets 18 having a north pole on the outside in the radial direction and the magnets 18 having the south pole on the outside in the radial direction are alternately arranged along the circumferential direction.
- the stator 14 is formed by a stator core 20 as an armature core, an insulator 22 attached to the stator core 20, and a conductive winding 24 wound around the stator core 20.
- a plurality of coils 26 are provided.
- the stator 14 includes three first terminals 28 and one second terminal 30 to which the end portions of the coil 26 are connected.
- the stator core 20 is a laminated core formed by laminating core constituent plates in the axial direction, which are formed by punching a steel plate, which is a soft magnetic material, into a predetermined shape.
- This stator core 20 includes an annular portion 32 formed in an annular shape and a plurality of teeth portions 34 protruding radially inward from the annular portion 32. As shown in FIG. 3, in this embodiment, 15 teeth portions 34 are arranged at equal intervals along the circumferential direction.
- the insulator 22 is formed using a resin material that is an insulating material.
- This insulator 22 includes an annular covering portion 36 disposed along the radially inner surface of the annular portion 32 of the stator core 20 .
- the insulator 22 also includes a plurality of tooth covering portions 38 extending radially inward from the annular covering portion 36.
- the number of teeth covering portions 38 matches the number of teeth portions 34 of stator core 20.
- Each tooth covering portion 38 covers a portion of each tooth portion 34 where a coil 26, which will be described later, is formed.
- the insulator 22 includes a flange portion 40 that protrudes from the radially inner end of the tooth covering portion 38 in the axial direction and in the opposite direction to the tooth portion 34.
- a coil 26, which will be described later, is arranged around the tooth covering portion 38 and between the collar portion 40 and the annular covering portion 36. Note that the insulator 22 of this embodiment has a structure that is divided into two parts in the axial direction.
- the insulator 22 includes three first terminal support parts 42 on which three first terminals 28, which will be described later, are supported.
- the three first terminal support parts 42 are arranged along one end surface of the annular part 32 of the stator core 20 in the axial direction.
- An end portion of the first terminal support portion 42 on one side in the circumferential direction is arranged at the same position in the circumferential direction as the tooth portion 34 arranged on one side in the circumferential direction among a pair of circumferentially adjacent teeth portions 34. .
- the end portion of the first terminal support portion 42 on the other side in the circumferential direction is arranged at the same position in the circumferential direction as the tooth portion 34 arranged on the other side in the circumferential direction among the pair of circumferentially adjacent teeth portions 34. ing. Furthermore, the circumferential center portion of the first terminal support portion 42 is disposed at a circumferential position corresponding to between the pair of circumferentially adjacent teeth portions 34 . In this embodiment, the three first terminal support parts 42 are arranged side by side along the circumferential direction at positions corresponding to the four circumferentially adjacent teeth parts 34. Furthermore, a first terminal fitting portion 44 as a terminal fitting portion is formed in each of the three first terminal support portions 42 . The first terminal fitting portion 44 is formed in a concave shape with one axial side open.
- the insulator 22 includes a second terminal support portion 46 on which a second terminal 30, which will be described later, is supported.
- the second terminal support portion 46 is arranged along one end surface of the annular portion 32 of the stator core 20 in the axial direction.
- the second terminal support portion 46 is provided over a range corresponding to the four teeth portions 34 adjacent to each other in the circumferential direction.
- the second terminal support section 46 is disposed on one side in the circumferential direction with respect to the first terminal support section 42 disposed closest to one side in the circumferential direction among the three first terminal support sections 42 .
- the second terminal support section 46 is disposed adjacent to the first terminal support section 42 in the circumferential direction, which is the first terminal support section 42 disposed closest to one side in the circumferential direction among the three first terminal support sections 42 .
- a second terminal fitting portion 48 is formed in the second terminal support portion 46 .
- the second terminal fitting portion 48 is formed in a concave shape with one axial side open. Note that the detailed configuration of the second terminal fitting portion 48 will be described in detail later.
- the coil 26 is formed by winding a wire 24 such as a copper wire around the teeth 34 of the stator core 20 via an insulator 22.
- a wire 24 such as a copper wire around the teeth 34 of the stator core 20 via an insulator 22.
- five coils 26 forming a U phase, five coils 26 forming a V phase, and five coils 26 forming a W phase are formed around a defined tooth portion 34, respectively.
- the U-phase coil 26, the V-phase coil 26, and the W-phase coil 26 are arranged in this order along the circumferential direction. Furthermore, the five coils 26 forming the U phase, the five coils 26 forming the V phase, and the five coils 26 forming the W phase are each connected in series.
- one end of the winding 24 forming the five U-phase coils 26 will be referred to as a U-phase first terminal 50A as the terminal of the coil 26. Further, the other end of the winding 24 forming the five U-phase coils 26 will be referred to as a U-phase second terminal 50B as the terminal of the coil 26.
- V-phase first terminal 50A the terminal of the coil 26
- V-phase second terminal 50B the terminal of the coil 26
- one end of the winding 24 forming the five W-phase coils 26 will be referred to as a W-phase first terminal 50A as a terminal of the coil 26. Further, the other end of the winding 24 forming the five W-phase coils 26 will be referred to as a W-phase second terminal 50B as the terminal of the coil 26.
- the U-phase first terminal section 50A, the V-phase first terminal section 50A, and the W-phase first terminal section 50A are connected to the three first terminals 28. are connected to each. Further, the U-phase second terminal section 50B, the V-phase second terminal section 50B, and the W-phase second terminal section 50B are connected to the second terminal 30.
- the first terminal 28 is formed by pressing a copper plate, which is a conductive member.
- the first terminal 28 includes a first insulator fixing part 52 as an insulator fixing part formed in a rectangular plate shape whose thickness direction is the radial direction.
- the first terminal 28 also includes a first connecting portion 54 that extends radially inward from the other end in the axial direction in the circumferential center of the first insulator fixing portion 52 .
- the first terminal 28 includes a second connecting portion 78 that extends radially inward from the other axial end of the first insulator fixing portion 52 and is disposed adjacent to the first connecting portion 54. ing.
- the first insulator fixing part 52 includes a base plate part 56 formed in a rectangular shape with the circumferential direction as the longitudinal direction and the axial direction as the transverse direction when viewed from the radial direction.
- the first insulator fixing portion 52 also includes a plurality of (in this embodiment, two) press-fit fittings that protrude toward one side in the circumferential direction from a portion on the other side in the axial direction at one end in the circumferential direction of the base plate portion 56. 58.
- the first insulator fixing portion 52 also includes a plurality of (in this embodiment, two) press-fit fittings that protrude toward the other side in the circumferential direction from a portion on the other side in the axial direction at the other end in the circumferential direction of the base plate portion 56. 58.
- the shape of the plurality of press-fitting portions 58 when viewed from the radial direction is a sawtooth shape.
- the first insulator fixing portion 52 includes looseness reducing protrusions 60 that protrude radially inward from portions on the other axial side of both ends of the substrate portion 56 in the circumferential direction.
- the first connecting portion 54 includes a substrate portion 62 formed in a rectangular shape with the radial direction as the longitudinal direction and the circumferential direction as the lateral direction when viewed from the axial direction. Further, the first connecting portion 54 extends from one end in the circumferential direction at the radially inner end of the substrate portion 62 to one side in the circumferential direction, and has an end portion opposite to the substrate portion 62 in the circumferential direction. It has an extending portion 64 that is folded back to the other side. The extending portion 64 and the distal end portion of the base plate portion 62 constitute a caulking portion 66 whose other side in the circumferential direction is open. As shown in FIG.
- the aforementioned first terminal section 50A is held between the caulking sections 66, so that the first terminal section 50A is connected to the caulking section 66.
- a portion of the base plate portion 62 that is radially outer than the caulking portion 66 is a first intermediate portion 67. As shown in FIGS.
- the second connecting portion 78 is disposed on the other side in the circumferential direction with respect to the first connecting portion 54 and is provided independently from the first connecting portion 54 . That is, the second connecting portion 78 is provided at a distance from the first connecting portion 54 in the circumferential direction.
- the second connecting portion 78 includes a first leg portion 80 that bends and extends radially inward from the other end of the first insulator fixing portion 52 in the axial direction. In this embodiment, the length of the first leg portion 80 in the radial direction is longer than the length of the substrate portion 62 of the first connecting portion 54 in the radial direction.
- the end of the first leg portion 80 on the first insulator fixing portion 52 side is a first bent portion 82 that is bent in an L shape and serves as a stress concentration portion.
- the second connecting portion 78 includes a second leg portion 84 extending from the radially inner end of the first leg portion 80 toward the other side in the axial direction.
- the boundary portion between the second leg portion 84 and the first leg portion 80 is a second bent portion 86 that is bent in an L shape and serves as a stress concentration portion.
- the second leg portion 84 constitutes a second intermediate portion 88 together with the first leg portion 80 .
- the second intermediate portion 88 is thinner than the first intermediate portion 67 of the first connecting portion 54 .
- the second connecting portion 78 includes a widened portion 80 that extends from the other end of the second leg portion 84 in the axial direction toward one side in the circumferential direction. Furthermore, the second connecting portion 78 includes a power source side connecting portion 92 that extends radially inward from the other axial end of the second leg portion 84 and the other axial end of the widened portion 80 .
- most of the widened part 80 and most of the power supply side connection part 92 are arranged at the same position in the circumferential direction as the caulked part 66 of the first connection part 54. has been done.
- the first insulator fixing part 52 of the first terminal 28 is inserted into the first terminal fitting part 44 of the insulator 22.
- the first insulator fixing part 52 is fixed to the insulator 22, and the first terminal 28 is supported by the insulator 22.
- the plurality of press-fitting parts 58 (see FIG. 5) of the first insulator fixing part 52 are inserted into the first terminal fitting part 44. It is press-fitted into the inner wall of the Thereby, the state in which the first insulator fixing part 52 is fixed to the insulator 22 is maintained.
- a plurality of The press-fitting portion 58 is arranged at the same position in the circumferential direction as the tooth portion 34 on one side in the circumferential direction among the pair of circumferentially adjacent teeth portions 34 .
- the plurality of press-fitting portions 58 on the other side in the circumferential direction of the first insulator fixing portion 52 are in contact with the teeth portions 34 on the other side in the circumferential direction among a pair of teeth portions 34 adjacent in the circumferential direction. placed in the same position.
- the second connecting part 54 is arranged between a pair of circumferentially adjacent coils 26.
- the other axial end of the second leg portion 84 constituting the other axial end of the second connecting portion 54, the widened portion 80, and the power supply side connecting portion 92 are connected to a pair of circumferentially adjacent ends. It protrudes from between the coils 26 toward the other side in the axial direction.
- a power supply side terminal 94 connected to the power supply side is provided on the other axial side of the stator 14.
- three power supply side terminals 94 are provided corresponding to the three first terminals 28, and the power supply side terminals 94 are formed in a rectangular plate shape with a thickness direction in the axial direction.
- the power supply side connection parts 92 of the second connection parts 78 of the three first terminals 28 are in contact with the three power supply side terminals 94, respectively, and are joined by welding.
- the stress generated in the first bending part 82 is the stress generated in the second bending part 86. There is a high stress on the
- the first terminal portion 50A includes a first portion 68 drawn out from the radially outer end of the coil end 26A on one axial side toward the other side in the circumferential direction. Further, the first end portion 50A includes a second portion 70 extending from the other side in the circumferential direction of the first portion 68 toward the radial inside (the side opposite to the annular portion 32 of the stator core 20).
- a slack portion 72 bent in an L shape from the first portion 68 to the second portion 70 is formed at the boundary portion between the first portion 68 and the second portion 70 in the first terminal portion 50A. ing.
- the second portion 70 of the first terminal portion 50A described above is connected to the caulking portion 66 of the first terminal 28.
- the second portion 70 is pulled out on the other side in the circumferential direction of the first portion 68. What is necessary is just to form it so that it may extend toward the radial direction outer side (the annular part 32 side of the stator core 20). Further, the slack portion 72 may have a gently curved shape.
- the second portion 70 of the first terminal portion 50A when the second portion 70 of the first terminal portion 50A is connected to the caulking portion 66 of the first terminal 28, the second portion 70 of the first terminal portion 50A is The first connecting portion 54 is disposed along one surface of the substrate portion 62 in the axial direction. Further, the first portion 68, the second portion 70, and the slack portion 72 of the first terminal portion 50A are arranged between the coil ends 26A on one axial side of the pair of circumferentially adjacent coils 26.
- the second terminal 30, like the first terminal 28, is formed by pressing a copper plate, which is a conductive member.
- the second terminal 30 includes a second insulator fixing part 74 as an insulator fixing part formed in a plate shape extending in the circumferential direction with the radial direction as the thickness direction.
- the center portion in the circumferential direction of the second insulator fixing portion 74 is referred to as the center fixing portion 74A, and the portions on one side and the other side in the circumferential direction of the second insulator fixing portion 74 are referred to as the end side fixing portions 74B. Make it.
- the central fixing portion 74A is similar to the first terminal 28, except that it does not include the plurality of press-fit fitting portions 58 and that the connecting piece portions 76 extend from both sides in the circumferential direction on one side in the axial direction. It is configured similarly to the first insulator fixing part 52 (see FIG. 5).
- the end fixing part 74B on one side in the circumferential direction is the first insulator of the first terminal 28, except that the connecting piece part 76 extends from the end on one side in the axial direction and the other side in the circumferential direction. It is configured similarly to the fixing part 52 (see FIG. 5).
- the connecting piece portion 76 of the end fixing portion 74B on one side in the circumferential direction is connected to the connecting piece portion 76 on the one side in the circumferential direction of the central fixing portion 74A.
- the end fixing part 74B on the other side in the circumferential direction is the first insulator of the first terminal 28, except that the connecting piece part 76 extends from the end on the one side in the axial direction and the one side in the circumferential direction. It is configured similarly to the fixing part 52 (see FIG. 5).
- the connecting piece portion 76 of the end fixing portion 74B on the other side in the circumferential direction is connected to the connecting piece portion 76 on the other side in the circumferential direction of the central fixing portion 74A.
- the parts of the central fixing part 74A and the end fixing parts 74B that correspond to the first insulator fixing part 52 of the first terminal 28 are given the same reference numerals as the first insulator fixing part 52.
- the second terminal 30 is arranged radially inward from the other end in the axial direction of the central fixing part 74A, the end fixing part 74B on one side in the circumferential direction, and the end fixing part 74B on the other side in the circumferential direction.
- Three first connection portions 54 are provided, each of which extends.
- the three first connecting portions 54 are arranged at equal intervals along the circumferential direction.
- the three first connection parts 54 of the second terminal 30 have the same configuration as the first connection part 54 of the first terminal 28, respectively.
- the first connecting portion 54 of the second terminal 30 will be given the same reference numeral as the first connecting portion 54 of the first terminal 28.
- the second terminal portion 50B is held between the caulking portions 66 of the first connecting portion 54, so that the second terminal portion 50B is held between the caulking portions 66 of the first connecting portion 54. 66.
- the second insulator fixing part 74 of the second terminal 30 described above is inserted into the second terminal fitting part 48 of the insulator 22.
- a central fitting recess 48A into which the other axial end of the central fixing part 74A is inserted. is formed in the circumferential center of the bottom of the second terminal fitting part 48.
- an end-side fitting recess 48B into which the other axial end of the end-side fixing part 74B on one side in the circumferential direction is inserted. is formed on one circumferential side of the bottom of the second terminal fitting part 48.
- an end-side fitting recess 48B into which the other end in the axial direction of the end-side fixing part 74B on the other side in the circumferential direction is inserted. is formed.
- the second insulator fixing part 74 of the second terminal 30 is inserted into the second terminal fitting part 48 of the insulator 22, the other axial end of the central fixing part 74A is inside the central fitting recess 48A.
- the ends on the other axial side of the end fixing portions 74B on one side in the circumferential direction and the other side in the circumferential direction are arranged in the respective end side fitting recesses 48B.
- the second insulator fixing part 74 is fixed to the insulator 22, and the second terminal 30 is supported by the insulator 22. Further, in a state in which the other end in the axial direction of the end fixing portions 74B on one side and the other side in the circumferential direction are arranged in the respective end side fitting recesses 48B, the plurality of press-fit fitting portions 58 It is press-fitted into the inner wall of the end-side fitting recess 48B. Thereby, the state in which the second insulator fixing part 74 is fixed to the insulator 22 is maintained.
- the plurality of press-fitting parts 58 of the first terminal 28 are arranged at the same position in the circumferential direction as the predetermined teeth part 34. Further, as shown in FIG. 3, the three first connecting portions 54 of the second terminal 30 are each arranged at the center of a pair of teeth portions 34 adjacent to each other in the circumferential direction.
- the second terminal section 50B has the same configuration as the first terminal section 50A. Note that portions of the second terminal section 50B that correspond to the first terminal section 50A are given the same reference numerals as those of the first terminal section 50A.
- the second portion 70 of the second terminal portion 50B of each phase is connected to the three caulking portions 66 of the second terminal 30, respectively.
- FIG. 1 As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG.
- the current flowing through the coil 26 of each phase is switched. This generates a rotating magnetic field around the stator 14, causing the rotor 12 to rotate.
- the first connecting portion 54 and the second connecting portion 78 of the first terminal 28 are arranged between a pair of circumferentially adjacent coils 26.
- the stator 14 can be downsized in the axial direction.
- the first insulator fixing part 52 of the first terminal 28 is When inserted into the terminal fitting part 44, the plurality of press-fitting parts 58 of the first insulator fixing part 52 are press-fitted into the inner wall of the first terminal fitting part 44. Thereby, it is possible to suppress the first terminal 28 from shifting relative to the insulator 22 due to the vibration of the motor 10. As a result, reliability against vibrations of the motor 10 can be ensured or improved.
- vibration of the first connecting portion 54 can be suppressed.
- the plurality of press-fitting parts 58 are inserted into the end-side fitting recess. It is press-fitted into the inner wall of 48B.
- the first terminal portion 50A and the second terminal portion 50B of the coil 26 are connected to the first portion 68, the second portion 70, and the slack portion. It has a structure having a portion 72. Thereby, the tension generated in the first terminal portion 50A and the second terminal portion 50B can be alleviated by the slack portion 72. Thereby, stress generated at the connection portion between the coil 26 and the terminals (first terminal 28 and second terminal 30) can be alleviated. As a result, it is possible to suppress occurrence of disconnection in the first terminal portion 50A and the second terminal portion 50B of the coil 26.
- the second connection part 78 when the power supply side connection part 92 of the second connection part 78 of the first terminal 28 is in contact with the power supply side terminal 94, the second connection part 78 is in contact with the power supply side terminal 94. It is bent and deformed to one side in the axial direction. Further, in a state where the second connecting portion 78 is flexibly deformed to one side in the axial direction, stress is concentrated on the first bent portion 82 and the second bent portion 86. In this way, by configuring so that stress is concentrated on the first bending part 82 and the second bending part 86 of the second connection part 78, the power supply side connection part 92 of the second connection part 78 can be connected to the power supply side terminal 94.
- the second connecting portion 78 is provided independently of the first connecting portion 54. Thereby, stress generated on the second connection portion 78 side can be further suppressed from affecting the first connection portion 54 side. As a result, it is possible to further suppress stress in the first connecting portion 54 from increasing when the motor 10 vibrates.
- the second intermediate portion 88 of the second connecting portion 78 is thinner than the first intermediate portion 67 of the first connecting portion 54. Therefore, it is possible to increase the stress generated on the second connection part 78 side when the power supply side connection part 92 of the second connection part 78 is joined to the power supply side terminal 94. Thereby, stress generated on the second connection portion 78 side can be further suppressed from affecting the first connection portion 54 side. As a result, it is possible to further suppress stress in the first connecting portion 54 from increasing when the motor 10 vibrates.
- the second connection part 78 of the first terminal 28 when the power supply side connection part 92 of the second connection part 78 of the first terminal 28 is in contact with the power supply side terminal 94, the second connection part 78 is in contact with the power supply side terminal 94.
- the first bent portion 82 is plastically deformed by being bent toward one side in the axial direction. By making the first bent part 82 plastically deformed in this way, the contact pressure between the power supply side connection part 92 of the second connection part 78 of the first terminal 28 and the power supply side terminal 94 is stabilized. In this state, the two can be joined by welding.
- most of the widened portion 80 of the second connection portion 78 and most of the power supply side connection portion 92 are connected to the caulked portion 66 of the first connection portion 54. and are placed at the same circumferential position. Thereby, it is possible to suppress the dimension from the first connecting portion 54 to the second connecting portion 78 of the first terminal 28 from increasing.
- the first terminal 28 of the motor of the second embodiment is the same as described above, except that the power supply side connection part 92 is not bent with respect to the second leg part 84 and the widened part 80. It is configured similarly to the first terminal 28 of the motor 10 of the first embodiment (see FIG. 5, etc.).
- the load in the radial direction is applied to the second connection part 78. It is input to the power supply side connection section 92.
- the second connecting portion 78 is deflected and deformed in the radial direction.
- stress is concentrated on the first bent portion 82 and the second bent portion 86 when the second connecting portion 78 is flexibly deformed in the radial direction.
- the stress generated in the second bending part 86 is greater than the stress generated in the first bending part 82. It's under high stress.
- the first terminal 28 of the motor of the second embodiment described above it is possible to suppress stress in the first connecting portion 54 from increasing when the motor 10 vibrates, and ensure durability against vibrations of the motor 10. I can do it.
- the second connecting portion 78 extends from the first connecting portion 54 and is provided integrally with the first connecting portion 54.
- the structure is as follows.
- the second connecting portion 78 includes a first leg portion 80 extending radially inward from the radially inner end of the base plate portion 62 of the first connecting portion 54 . Further, the second connecting portion 78 includes a second leg portion 84 extending from the radially inner end of the first leg portion 80 toward the other side in the axial direction.
- a folded portion 96 as a stress concentration portion is formed in the axially intermediate portion of the second leg portion 84 .
- the folded portion 96 is formed in a U-shape with an open radially inner side. Further, the folded portion 96 includes a first folded bent portion 96A, a second folded bent portion 96B, a third folded bent portion 96C, and a fourth folded bent portion 96D, which are bent into an L shape.
- the first terminal 28 of the motor of the fourth embodiment is different from that of the third embodiment except that the orientations of the second leg part 84, the folded part 96, and the power supply side connection part 92 are different.
- the configuration is similar to the first terminal 28 of the motor (see FIG. 11).
- the opening direction of the folded portion 96 is on one side in the circumferential direction.
- the power supply side connection portion 92 of the second connection portion 78 In a state in which the second connecting portion 78 is in contact with a power supply side terminal (not shown), the second connecting portion 78 is bent and deformed in the axial direction. Further, in a state where the second connecting portion 78 is bent and deformed in the axial direction, stress is concentrated on the folded portion 96. By configuring so that the stress is concentrated on the folded portion 96, stress generated on the second connection portion 78 side when the power supply side connection portion 92 of the second connection portion 78 is joined to the power supply side terminal (not shown) is reduced. can be suppressed from affecting the first connection portion 54 side. Thereby, it is possible to suppress stress in the first connecting portion 54 from increasing when the motor 10 vibrates, and it is possible to ensure durability against vibrations of the motor 10.
- the first terminal 28 of the motor according to the fifth embodiment has a folded part 96 formed in the radially intermediate part of the first leg part 80 and a power supply side connection part 92 located at the first terminal 28. It has the same structure as the first terminal 28 of the motor of the third embodiment described above (see FIG. 11), except that it is not bent with respect to the two leg parts 84.
- the opening direction of the folded portion 96 is the other side in the axial direction. Also in the first terminal 28 of the motor of this fifth embodiment, it is possible to suppress the increase in stress in the first connecting portion 54 when the motor 10 vibrates, and it is possible to ensure durability against vibrations of the motor 10. .
- the present disclosure is not limited to the above, and can be implemented with various modifications other than the above without departing from the spirit thereof.
- the configuration of the motor 10 etc. may be applied to a generator.
- the configuration of the motor 10 and the like can also be applied to an outer rotor type brushless motor in which the rotor 12 is disposed radially outside the stator 14.
- the configuration of the present disclosure can also be applied to a rotor configured to include an armature having the same configuration as the stator 14 of this embodiment.
- Additional note 1 an armature core (20) having a plurality of teeth portions (34) arranged at intervals in the circumferential direction; an insulator (22) attached to the armature core; a plurality of coils (26) formed by electrically conductive windings (24) wound around the plurality of teeth portions; an insulator fixing part (52) formed using a conductive member and fixed to the insulator; and a caulking part (66) extending from the insulator fixing part and to which the end part (50A) of the coil is fixed.
- the first connecting portion includes a first intermediate portion (67) that constitutes a portion between the caulking portion and the insulator fixing portion
- the second connection part includes a second intermediate part (88) that constitutes a part between the power supply side connection part and the insulator fixing part or a part between the power supply side connection part and the first connection part.
- Appendix 5 The armature according to any one of Supplementary Notes 2 to 4, wherein at least a portion of the caulking portion and at least a portion of the power supply side connecting portion are arranged at the same circumferential position.
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Abstract
Description
号に基づくもので、ここにその記載内容を援用する。
次に、本実施形態の作用並びに効果について説明する。
次に、図10~図13を用いて、他の形態のモータの第1ターミナル28の構成について説明する。なお、他の形態のモータの第1ターミナル28において既に説明した第1ターミナル28と対応する部分には、既に説明した第1ターミナル28と同じ符号を付して、その説明を省略することがある。
図10に示されるように、第2実施形態のモータの第1ターミナル28は、電源側接続部92が第2脚部84及び拡幅部80に対して屈曲していないことを除いては、前述の第1実施形態のモータ10の第1ターミナル28(図5等参照)と同様に構成されている。
図11に示されるように、第3実施形態のモータの第1ターミナル28では、第2接続部78が、第1接続部54から延出していると共に第1接続部54と一体に設けられた構成となっている。
図13に示されるように、第5実施形態のモータの第1ターミナル28は、第1脚部80の径方向の中間部に折返部96が形成されている点及び電源側接続部92が第2脚部84に対して屈曲していないことを除いては、前述の第3実施形態のモータの第1ターミナル28(図11参照)と同様に構成されている。第5実施形態のモータの第1ターミナル28では、折返部96の開放方向が軸方向他方側となっている。この第5実施形態のモータの第1ターミナル28においても、モータ10の振動時に第1接続部54の応力が高まることを抑制することができ、モータ10の振動に対する耐久性を確保することができる。
(付記1)
周方向に間隔をあけて配置された複数のティース部(34)を有する電機子コア(20)と、
前記電機子コアに取付けられたインシュレータ(22)と、
導電性の巻線(24)が複数の前記ティース部のまわりにそれぞれ巻回されることにより形成された複数のコイル(26)と、
導電性の部材を用いて形成され、前記インシュレータに固定されるインシュレータ固定部(52)と、前記インシュレータ固定部から延出していると共に前記コイルの端末部(50A)が固定されるカシメ部(66)を有する第1接続部(54)と、前記インシュレータ固定部又は前記第1接続部から延出していると共に電源側に接続される電源側接続部(92)を有しかつ前記電源側接続部が電源側に接続された状態で応力が集中している応力集中部(82、86、96)を有する第2接続部(78)と、を含んで構成されたターミナル(28)と、
を備えた電機子(14)。
(付記2)
前記第2接続部は、前記インシュレータ固定部から延出していると共に前記第1接続部とは独立して設けられている付記1に記載の電機子。
(付記3)
前記第2接続部は、前記第1接続部から延出していると共に前記第1接続部と一体に設けられている付記1に記載の電機子。
(付記4)
前記第1接続部は、前記カシメ部と前記インシュレータ固定部との間の部分を構成する第1中間部(67)を含んで構成され、
前記第2接続部は、前記電源側接続部と前記インシュレータ固定部との間の部分又は前記電源側接続部と前記第1接続部との間の部分を構成する第2中間部(88)を含んで構成され、
前記第2中間部が、前記第1中間部よりも細くなっている付記2に記載の電機子。
(付記5)
前記カシメ部の少なくとも一部と前記電源側接続部の少なくとも一部とが、周方向の同じ位置に配置されている付記2~付記4のいずれか1つに記載の電機子。
(付記6)
前記第1接続部及び前記第2接続部が、周方向に隣合う一対の前記コイルの間に配置されている付記1~付記5のいずれか1つに記載の電機子。
(付記7)
前記電源側接続部が電源側に接続された状態で、前記応力集中部が塑性変形している付記1~付記6のいずれか1つに記載の電機子。
(付記8)
前記インシュレータには、前記インシュレータ固定部が嵌合するターミナル嵌合部(44)が形成されており、
前記インシュレータ固定部の一部は、前記ターミナル嵌合部に圧入状態で嵌合する圧入嵌合部(58)となっている付記1~付記7のいずれか1つに記載の電機子。
(付記9)
前記圧入嵌合部が、前記第1接続部及び前記第2接続部に対して周方向の両側にそれぞれ設けられている付記8に記載の電機子。
(付記10)
付記1~付記9のいずれか1項に記載の電機子を含んで構成された固定子(14)及び回転子(12)の一方と、
前記電機子と径方向に対向して配置されたマグネット(18)を有する固定子及び回転子の他方と、
を備えた回転電機(10)。
Claims (10)
- 周方向に間隔をあけて配置された複数のティース部(34)を有する電機子コア(20)と、
前記電機子コアに取付けられたインシュレータ(22)と、
導電性の巻線(24)が複数の前記ティース部のまわりにそれぞれ巻回されることにより形成された複数のコイル(26)と、
導電性の部材を用いて形成され、前記インシュレータに固定されるインシュレータ固定部(52)と、前記インシュレータ固定部から延出していると共に前記コイルの端末部(50A)が固定されるカシメ部(66)を有する第1接続部(54)と、前記インシュレータ固定部又は前記第1接続部から延出していると共に電源側に接続される電源側接続部(92)を有しかつ前記電源側接続部が電源側に接続された状態で応力が集中している応力集中部(82、86、96)を有する第2接続部(78)と、を含んで構成されたターミナル(28)と、
を備えた電機子(14)。 - 前記第2接続部は、前記インシュレータ固定部から延出していると共に前記第1接続部とは独立して設けられている請求項1に記載の電機子。
- 前記第2接続部は、前記第1接続部から延出していると共に前記第1接続部と一体に設けられている請求項1に記載の電機子。
- 前記第1接続部は、前記カシメ部と前記インシュレータ固定部との間の部分を構成する第1中間部(67)を含んで構成され、
前記第2接続部は、前記電源側接続部と前記インシュレータ固定部との間の部分又は前記電源側接続部と前記第1接続部との間の部分を構成する第2中間部(88)を含んで構成され、
前記第2中間部が、前記第1中間部よりも細くなっている請求項2に記載の電機子。 - 前記カシメ部の少なくとも一部と前記電源側接続部の少なくとも一部とが、周方向の同じ位置に配置されている請求項2~請求項4のいずれか1つに記載の電機子。
- 前記第1接続部及び前記第2接続部が、周方向に隣合う一対の前記コイルの間に配置されている請求項1~請求項5のいずれか1つに記載の電機子。
- 前記電源側接続部が電源側に接続された状態で、前記応力集中部が塑性変形している請求項1~請求項6のいずれか1つに記載の電機子。
- 前記インシュレータには、前記インシュレータ固定部が嵌合するターミナル嵌合部(44)が形成されており、
前記インシュレータ固定部の一部は、前記ターミナル嵌合部に圧入状態で嵌合する圧入嵌合部(58)となっている請求項1~請求項7のいずれか1つに記載の電機子。 - 前記圧入嵌合部が、前記第1接続部及び前記第2接続部に対して周方向の両側にそれぞれ設けられている請求項8に記載の電機子。
- 請求項1~請求項9のいずれか1項に記載の電機子を含んで構成された固定子(14)及び回転子(12)の一方と、
前記電機子と径方向に対向して配置されたマグネット(18)を有する固定子及び回転子の他方と、
を備えた回転電機(10)。
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JP2006271188A (ja) * | 2005-02-23 | 2006-10-05 | Asmo Co Ltd | 電機子及びその製造方法、並びに直流モータ |
JP2016067177A (ja) * | 2014-09-26 | 2016-04-28 | 三菱電機株式会社 | 回転電機の固定子 |
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JP2016067177A (ja) * | 2014-09-26 | 2016-04-28 | 三菱電機株式会社 | 回転電機の固定子 |
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