WO2024122141A1 - Motor - Google Patents
Motor Download PDFInfo
- Publication number
- WO2024122141A1 WO2024122141A1 PCT/JP2023/032802 JP2023032802W WO2024122141A1 WO 2024122141 A1 WO2024122141 A1 WO 2024122141A1 JP 2023032802 W JP2023032802 W JP 2023032802W WO 2024122141 A1 WO2024122141 A1 WO 2024122141A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- holder
- axial direction
- motor
- bus bar
- hole
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims description 15
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 10
- 239000012212 insulator Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
Images
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
Definitions
- the lead frame is a so-called bus bar, made of a conductive material and formed to extend in the circumferential direction.
- the molded terminal block also includes an insulating holder that holds the lead frame.
- circular holes are provided at the circumferential ends of the busbar, and the holder has pins that are inserted into the holes, and the busbar is held in the holder by inserting the pins into the holes.
- the motor of the present invention can ensure a sufficient distance between two adjacent bus bars in the circumferential direction while preventing the motor from becoming too large.
- FIG. 9 is a perspective view of a motor according to the second embodiment.
- FIG. 10 is a perspective view showing a bus bar included in the motor shown in FIG.
- FIG. 11 is a plan view of the motor shown in FIG. 12 is a perspective view showing a holder included in the motor shown in FIG. 9.
- FIG. 13 is a perspective view showing a stator, a second bus bar, and a second holder of the motor shown in FIG. 9.
- FIG. 1 is a perspective view of a motor 1 according to a first embodiment.
- FIG. 2 is a plan view of the motor 1 shown in FIG. 1.
- FIG. 3 is a perspective view of a stator 4 included in the motor 1 shown in FIG. 1.
- FIG. 4 is a perspective view of a bus bar 5 included in the motor 1 shown in FIG. 1.
- FIG. 5 is a perspective view of a holder 6 included in the motor 1 shown in FIG. 1.
- FIG. 6 is a perspective view of a stator 4, a second bus bar 52, and a second holder 62 included in the motor 1 shown in FIG. 1.
- FIG. 7 is a perspective view of a part of the second holder 62 and a part of the second bus bar 52.
- FIG. 8 is a perspective view of a protrusion 62d and an engagement portion 522c included in the motor 1 shown in FIG. 1.
- a part of the core 40 is omitted, some of the teeth 41 are omitted, some of the insulators 42 are omitted, and some of the coils 43 are omitted.
- the shaft 2 and the rotor 3 are omitted in Fig. 6 and Fig. 7.
- the first holder 61 and the first bus bar 51 are omitted in Fig. 6 and Fig. 7.
- the first bus bar 51 is omitted in Fig. 8, and the first holder 61 is shown by a virtual line.
- the motor 1 shown in FIG. 1 according to the first embodiment is an inner rotor type in which, when viewed from the axial direction A, the stator 4 is located outside the rotor 3 in the radial direction R, and the shaft 2 is located inside the rotor 3 in the radial direction R, with the rotor 3 being used as the reference.
- this motor 1 is an inner rotor type brushless motor in which the rotor 3 is located inside the stator 4 in the radial direction R.
- the rotor 3 has a yoke 31 and multiple magnets 32.
- the yoke 31 is made of a magnetic material such as iron.
- the magnets 32 are, for example, permanent magnets.
- the multiple magnets 32 are, for example, arranged at equal intervals along the circumferential direction C.
- the rotor 3 according to this embodiment has, for example, 14 magnets 32.
- Each of the teeth 41 is formed to protrude from the inner peripheral surface of the core 40 toward the rotor 3 in the radial direction R.
- the stator 4 according to this embodiment has, for example, 18 teeth 41.
- the insulators 42 are formed, for example, from an insulating resin and are attached to the surfaces of the teeth 41 to ensure insulation between the teeth 41 and the coils 43.
- the stator 4 according to this embodiment includes, for example, 18 insulators 42.
- the coils 43 according to this embodiment are formed by winding wire around the teeth 41.
- the winding has a portion 43a wound around the teeth 41 and lead wires 43b located at both ends and drawn out from the teeth 41.
- the lead wires 43b are electrically connected to, for example, a power source (not shown) via the bus bar 5.
- the coils 43 are electrically connected to a power source (not shown).
- the stator 4 according to this embodiment has, for example, 18 coils 43.
- the busbar 5 is formed, for example, from a metal having electrical conductivity.
- the motor 1 according to this embodiment has a plurality of first busbars 51 (see FIG. 1 and FIG. 2) and a plurality of second busbars 52 (see FIG. 6).
- the first bus bar 51 is held by a first holder 61, which will be described later, and is disposed on one side of the first holder 61 in the axial direction A (see FIG. 1).
- the motor 1 according to this embodiment has multiple (e.g., three) first bus bars 51.
- the end of the lead wire 43b of the coil 43 is electrically connected to the back surface of the first bus bar 51 on the other side in the axial direction A.
- the first bus bar 51 also has a body 51a, a connection portion 51b, and a hole portion 51c.
- the body 51a contacts the surface of the body 61a of the first holder 61 in the axial direction A.
- connection portion 51b protrudes from the main body 51a toward one side in the radial direction R (the side away from the shaft 2), and then protrudes toward one side in the axial direction A (the side away from the stator 4).
- the lead wire 43b of the coil 43 is connected to the connection portion 51b.
- the connection portion 51b has a connection surface 51bf on the outside in the radial direction R.
- the first busbar 51 is disposed on one side in the axial direction A with respect to the stator 4, as shown in FIG. 1. Therefore, the connection surface 51bf is disposed adjacent to the outer periphery 4o of the stator 4 in the axial direction A.
- the holes 51c penetrate the main body 51a in the axial direction A.
- the first bus bar 51 according to this embodiment has a plurality of holes 51c. Some of the holes 51c engage with the first protrusion 61d formed on the first holder 61 (see FIG. 1), and the remaining holes 51c are inserted with terminals 7 (described later) (see FIG. 1).
- the second busbar 52 is held by a second holder 62, which will be described later, and is disposed on a surface located on one side of the body 62a of the second holder 62 in the axial direction A (see FIG. 6).
- the motor 1 according to this embodiment has multiple (e.g., 15) second busbars 52.
- the other back surface of the second busbar 52 in the axial direction A is electrically connected to the end of the lead wire 43b of the coil 43.
- the second busbar 52 in this embodiment is a predetermined distance away from the terminal 7 attached to the second holder 62 and is not in contact with the terminal 7.
- the multiple second bus bars 52 include one second bus bar 521 having a body 521a with a portion 521a1 extending in the circumferential direction C and a portion 521a2 extending in the radial direction R, and the other second bus bar 522 having a body 522a composed of a portion extending in the circumferential direction C.
- the second bus bar 521 has a body 521a, a connection portion 521b, and a hole portion 521c.
- the body 521a is inserted into a groove portion 62b formed in the body 62a of the second holder 62, and comes into contact with the body 62a of the second holder 62.
- connection portion 521b protrudes from the main body 521a toward one side in the radial direction R (the side away from the shaft 2), and then protrudes toward one side in the axial direction A (the side away from the stator 4).
- the lead wire 43b of the coil 43 is connected to the connection portion 521b.
- the connection portion 521b has a connection surface 521bf facing outward in the radial direction R.
- one of the second bus bars 521 is disposed on one side in the axial direction A with respect to the stator 4, as shown in FIG. 1. Therefore, the connection surface 521bf is disposed adjacent to the outer periphery 4o of the stator 4 in the axial direction A.
- the holes 521c penetrate the main body 521a in the axial direction A.
- the second bus bar 52 according to this embodiment has a plurality of holes 521c.
- the protrusions 62d formed on the second holder 62 are inserted into the plurality of holes 521c.
- the other second bus bar 522 has a body 522a, a connection portion 522b, and an engagement portion 522c.
- the body 522a is inserted into a groove portion 62b formed in the body 62a of the second holder 62, and comes into contact with the body 62a of the second holder 62.
- connection portion 522b protrudes from the main body 522a toward one side in the radial direction R (the side away from the shaft 2), and then protrudes toward one side in the axial direction A (the side away from the stator 4).
- a terminal of another device is connected to the connection portion 522b.
- the connection portion 522b has a connection surface 522bf facing outward in the radial direction R.
- the other second busbar 522 is disposed on one side in the axial direction A with respect to the stator 4, as shown in FIG. 1. Therefore, the connection surface 522bf is disposed adjacent to the outer periphery 4o of the stator 4 in the axial direction A.
- the engaging portion 522c is formed at the end of the main body 522a in the circumferential direction C.
- the engaging portion 522c according to this embodiment is disposed at the center of the main body 522a in the radial direction R when viewed from the axial direction A, as shown in Figs. 7 and 8. That is, the engaging portion 522c is formed symmetrically with respect to the center line 522CL of the main body 522a, as shown in Fig. 7.
- the engaging portion 522c is formed, for example, in a semicircular arc shape.
- the engaging portion 522c is disposed at a position in the circumferential direction C away from the location where the connecting portion 522b is disposed, as shown in Figs. 7 and 8.
- the engaging portion 522c engages with a protrusion 62d formed on the second holder 62, which will be described later.
- the holder 6 is made of insulating resin. As shown in FIG. 5, the motor 1 according to this embodiment has a first holder 61 (see FIG. 1) and a second holder 62 (see FIG. 6).
- the first holder 61 When viewed from the axial direction A, the first holder 61 is formed in an annular shape and has an inner peripheral edge 61i located at the innermost position in the radial direction R and an outer peripheral edge 61o located at the outermost position in the radial direction R.
- the first holder 61 has a main body 61a, a wall portion 61b formed on the surface of one side of the main body 61a in the axial direction A and extending in the circumferential direction C, a plurality of holes 61c formed in the main body 61a, a first protrusion 61d protruding from the surface of one side of the main body 61a in the axial direction A to one side in the axial direction A, and a second protrusion 61f protruding from the back surface of the main body 61a on the other side in the axial direction A toward the second holder 62 on the other side in the axial direction A.
- the first holder 61 has a recess (not shown) formed on the back surface of the other side of the main body 61a in the axial direction A and recessed from the back surface to the front surface in the axial direction A. Although not shown, a plurality of recesses are formed in the main body 61a.
- the wall portions 61b are disposed between the multiple first bus bars 51. That is, the first holder 61 has multiple wall portions 61b extending in the circumferential direction C.
- the wall portions 61b are formed on the surface of one side of the axial direction A of the main body 61a of the first holder 61 so as to protrude to one side in the axial direction A. Therefore, the wall portions 61b can increase the creepage distance between one first bus bar 51 and the other first bus bar 51 among the multiple first bus bars 51, while preventing the size of the first holder 61 in the radial direction R from increasing.
- the hole 61c is formed, for example, so as to penetrate the main body 61a in the axial direction A.
- the hole 61c is formed, for example, in a circular shape, and the terminal 7 is inserted through the hole 61c in the axial direction A.
- the first protrusion 61d is formed, for example, in a cylindrical shape, and is inserted into the hole 51c of the first busbar 51. After the first protrusion 61d is inserted into the hole 51c, the tip of the first protrusion 61d is crushed. The crushed tip of the first protrusion 61d is larger than the size of the hole 51c. Therefore, the first protrusion 61d can prevent the first busbar 51 from falling off the first holder 61.
- the second holder 62 When viewed from the axial direction A, the second holder 62 is formed in an annular shape and has an inner peripheral edge 62i that is located on the innermost side in the radial direction R, and an outer peripheral edge 62o that is located on the outermost side in the radial direction R.
- the second holder 62 has a main body 62a, a groove portion (recess) 62b formed on the surface of one side of the main body 62a in the axial direction A, a plurality of holes 62c formed in the main body 62a, a protrusion 62d protruding from the surface of one side of the main body 61a in the axial direction A to one side in the axial direction A, and a recess 62f formed on the surface of one side of the main body 62a in the axial direction A and recessed toward the other side in the axial direction A.
- the groove 62b is formed to be recessed from the surface on one side of the main body 62a in the axial direction A to the back surface on the other side, and is formed to be able to accommodate the main bodies 521a, 522a of the second busbar 52.
- a plurality of such grooves 62b are formed in the holder 6.
- the groove 62b also has a portion that extends in the circumferential direction C and a portion that extends in the radial direction R.
- the hole 62c is formed, for example, so as to penetrate the main body 62a in the axial direction A.
- the hole 62c is formed, for example, in a circular shape.
- the protrusion 62d is formed, for example, in a cylindrical shape. That is, the protrusion 62d is formed in a circular shape when viewed from the axial direction A.
- the second holder 62 in this embodiment has multiple protrusions 62d. Some of the multiple protrusions 62d are inserted into the hole portions 521c of one of the second bus bars 521, and the remainder of the multiple protrusions 62d are engaged with the engagement portions 522c of the other second bus bar 522. The worker then engages the protrusions 62d with a recess formed on the back surface of the first holder 61 on the other side in the axial direction A.
- the protrusion 62d of the second holder 62 is engaged with the recess of the first holder 61, and the first holder 61 can be assembled to the second holder 62 in a state in which the second bus bars 52 are sandwiched between the first holder 61 and the second holder 62 in the axial direction A.
- the protrusion 62d may be inserted into the hole 521c, engaged with the engagement portion 522c, and then the tip of the first protrusion 61d may be crushed to prevent the second bus bars 52 from falling off the second holder 62.
- the second protrusion 61f is fitted into the recess 62f, and the first holder 61 is assembled to the second holder 62 by the recess 62f and the second protrusion 61f.
- the terminals 7 are formed, for example, from a conductive metal.
- the motor 1 according to this embodiment has multiple terminals 7 (for example, three terminals) as shown in Figures 1, 2, 4, and 5.
- the terminal 7 is formed, for example, in a cylindrical shape extending in the axial direction A.
- the terminal 7 is inserted into the hole 61c of the first holder 61 and into the hole 62c of the second holder 62, and the other end of the terminal 7 in the axial direction A is fixed to the second holder 62, for example.
- Each of the terminals 7 electrically connects the bus bar 5 to an external device (not shown).
- the multiple terminals 7 are arranged along the radial direction R.
- the multiple terminals 7 are also arranged between the inner peripheral edge 62i and the outer peripheral edge 62o of the second holder 62.
- the multiple terminals 7 are arranged in a position that is deviated from the multiple connection surfaces 521bf, 522bf in the circumferential direction C. In other words, the multiple terminals 7 are arranged in a position that does not overlap the multiple connection surfaces 521bf, 522bf when viewed from the radial direction R.
- the cover may be formed, for example, from an insulating resin in a ring shape so as to cover the first holder 61 and the first bus bar 51 from one side in the axial direction A.
- the second holder 62 is provided with a protrusion 62d extending in the axial direction A, and the engagement portion 522c located at the end of the second bus bar 52 and the protrusion 62d are engaged in the circumferential direction C.
- the engagement portion 522c is formed in a semicircular arc when viewed from the axial direction A. If the engagement portion were configured as a hole that penetrates the main body 522a in the axial direction A, the engagement portion would be positioned so as to surround the entire circumference of the protrusion 62d.
- the engaging portion 522c is formed in a semicircular arc shape when viewed from the axial direction A, so that the distance between the second bus bar 52 having the engaging portion 522c and another bus bar 5 adjacent to the second bus bar 52 in the circumferential direction C can be secured while preventing the bus bar 52 from becoming too large in the circumferential direction C.
- the motor 1 is provided with a plurality of terminals 7 that are electrically connected to an external device, and the second holder 62 has an inner peripheral edge 62i and an outer peripheral edge 62o in the radial direction R of the second holder 62, and the plurality of terminals 7 are disposed between the inner peripheral edge 62i and the outer peripheral edge 62o.
- the second busbar 52 has multiple connection surfaces 521bf, 522bf arranged on the outer periphery 4o of the stator 4, and the multiple coils 43 are connected to the multiple connection surfaces 521bf, 522bf. Therefore, when connecting the terminals of other devices to the connection surfaces 521bf, 522bf, the worker's fingers can easily reach the connection surfaces 521bf, 522bf, improving workability.
- the terminal 7 is disposed at a position that is offset from the multiple connection surfaces 521bf, 522bf in the circumferential direction C. Therefore, when connecting an external device to the terminal 7, it is possible to prevent the connection surfaces 521bf, 522bf from coming into contact with the fingers of an operator, thereby improving workability.
- connection portion 51b of the first busbar 51 and the connection portions 521b, 522b of the second busbar 52 are arranged side by side along the circumferential direction C. This makes it possible to prevent a part of the connection portion 51b of the first busbar 51 from overlapping with a part of the connection portions 521b, 522b of the second busbar 52 in the radial direction R. Therefore, in the busbar 5 according to this embodiment, when connecting terminals of other devices to the connection portions 51b, 521b, 522b, the other connection portions 51b, 521b, 522b that are not to be connected do not get in the way. As a result, in the busbar 5 according to this embodiment, it is possible to suppress a decrease in workability when connecting terminals of other devices to the connection portions 51b, 521b, 522b.
- the engaging portion 522c in the above embodiment has been described as being formed in a semicircular arc shape when viewed from the axial direction A.
- the shape of the engaging portion 522c in this embodiment is not limited to this.
- the engaging portion 522c may be formed in a curved shape that is concave in the circumferential direction C toward the main body 522a of the other second bus bar 522, such as a curved shape that is half an ellipse or half an oval.
- the protrusion 62d in the above embodiment is formed in a cylindrical shape and is formed in a circular shape when viewed from the axial direction A.
- the shape of the protrusion 62d in this embodiment is not limited to this as long as it can engage with the engagement portion 522c.
- the protrusion 62d may be formed in a cylindrical shape that protrudes from the main body 62a toward one side in the axial direction A and can engage with the engagement portion 522c.
- the protrusion 62d may be, for example, in the shape of a half ellipse, a half oval, a rectangle, etc.
- the other second bus bar 522 has been described as having an engagement portion 522c that engages with the protrusion 62d of the second holder 62.
- the motor 1 according to the present embodiment is not limited to this.
- one second bus bar 521 may have an engagement portion that engages with the protrusion 62d of the second holder 62
- the first bus bar 51 may have an engagement portion that engages with the first protrusion 61d of the first holder 61.
- a protrusion may be provided on the other side of the axial direction A in the first holder 61, and the engagement portion 522c of the second bus bar 522 may engage with the protrusion.
- FIG. 9 is a perspective view of the motor 1A according to the second embodiment.
- FIG. 10 is a perspective view showing the bus bar 5A included in the motor 1A shown in FIG. 9.
- FIG. 11 is a plan view of the motor 1A shown in FIG. 9.
- FIG. 12 is a perspective view showing the holder 6A included in the motor 1A shown in FIG. 9.
- FIG. 13 is a perspective view showing the stator 4, the second bus bar 52A, and the second holder 62A included in the motor 1A shown in FIG. 9.
- the same configuration as that of the motor 1 according to the first embodiment is given the same reference numerals and the description thereof will be omitted.
- the cover 8 covering one side of the first holder 61A in the axial direction A is omitted.
- the bus bar 5A, the holder 6A, and the terminal 7A of the motor 1A according to the second embodiment are different from the bus bar 5, the holder 6, and the terminal 7 of the motor 1 according to the first embodiment.
- the motor 1A includes a shaft 2, a rotor 3, a stator 4, a bus bar 5A, a holder 6A, a terminal 7A, and a cover 8.
- the busbar 5A according to the second embodiment like the busbar 5 according to the first embodiment, has a first busbar 51A and a second busbar 52A, as shown in FIG. 10.
- the motor 1A is provided with multiple first bus bars 51A.
- the first bus bar 51A has a body 51a, a connection portion 51b, a hole portion 51c, and a hole portion 51d.
- the hole 51c penetrates the main body 51a in the axial direction A.
- the first bus bar 51A according to this embodiment has a plurality of holes 51c. When viewed from the axial direction A, the hole 51c is positioned farther away from the connection portion 51b than the hole 51d. Some of the plurality of holes 51c are inserted into the first protrusion 61d formed on the first holder 61A, and the terminal 7A is inserted into the remaining portion of the plurality of holes 51c.
- the hole 51d penetrates the main body 51a in the axial direction A.
- the radial size of the hole 51d is different from the radial size of the hole 51c. More specifically, the radial size of the hole 51d is smaller than the radial size of the hole 51c.
- the first bus bar 51A according to this embodiment has a plurality of holes 51d.
- the hole 51d is disposed adjacent to the connection portion 51b in the radial direction R.
- the lead wire 43b is inserted into the hole 51d, and the lead wire 43b and the first bus bar 51A are electrically connected.
- the motor 1A is provided with a plurality of second bus bars 52A.
- the plurality of second bus bars 52 include a second bus bar 521 having a body 521a with a portion 521a1 extending in the circumferential direction C and a portion 521a2 extending in the radial direction R, and a second bus bar 522 having a body 522a composed of a portion extending in the circumferential direction C.
- the second bus bar 521 has a body 521a, a connection portion 521b, a hole portion 521c, and a hole portion 521d.
- the body 521a is disposed on one surface of the body 62a of the second holder 62A in the axial direction A, and is in contact with the body 62a of the second holder 62A.
- the hole 521c penetrates the main body 521a in the axial direction A.
- one of the second bus bars 521 has multiple holes 521c. When viewed from the axial direction A, the hole 521c is positioned farther away from the connection portion 521b than the hole 521d. The hole 521c engages with the second protrusion 61f formed on the first holder 61A in the axial direction A.
- the hole 521d penetrates the main body 521a in the axial direction A.
- the radial size of the hole 521d is smaller than the radial size of the hole 521c.
- the one second bus bar 521 according to this embodiment has a plurality of holes 521d.
- the hole 521d is disposed adjacent to the connection portion 521b.
- the lead wire 43b is inserted into the hole 521d, and the lead wire 43b and the one second bus bar 521 are electrically connected.
- the other second bus bar 522 has a body 522a, a connection portion 522b, a hole portion 522d, and a hole portion 522e.
- the body 522a is disposed in the body 62a of the second holder 62A and contacts the body 62a of the second holder 62A.
- the hole 522d has a shape that penetrates the main body 522a in the axial direction A.
- the second bus bar 52A according to this embodiment has multiple holes 522d. Furthermore, the hole 522d engages with the second protrusion 61f formed on the first holder 61A in the axial direction A.
- the hole 522e penetrates the main body 521a in the axial direction A.
- the radial size of the hole 522e is smaller than the radial size of the hole 522d.
- the other second bus bar 522 according to this embodiment has a plurality of holes 522e.
- the hole 522e is disposed adjacent to the connection portion 522b.
- the lead wire 43b is inserted into the hole 522e, and the lead wire 43b and the other second bus bar 522 are electrically connected.
- the holder 6A according to the second embodiment like the holder 6 according to the first embodiment, has a first holder 61A and a second holder 62A as shown in FIG. 12.
- the second holder 62A serves as a cover that covers the first holder 61A.
- the first holder 61A has a main body 61a, a groove portion (recess) 61e, a hole portion 61c, a first protrusion 61d, and a second protrusion 61f.
- the groove portion 61e is formed on one surface of the main body 61a in the axial direction A, and is formed so as to be recessed from the surface on one side of the main body 61a to the back surface on the other side in the axial direction A.
- the groove portion 61e has a portion extending in the circumferential direction C and a portion extending in the radial direction R.
- the hole 61c is formed to penetrate the main body 61a in the axial direction A.
- the first protrusion 61d protrudes from the surface of the main body 61a on one side in the axial direction A to one side in the axial direction A.
- the second protrusion 61f protrudes from the back surface of the main body 61a on the other side in the axial direction A to the other side in the axial direction A.
- the second holder 62A has a main body 62a, a hole 62c, and a hole 62e.
- the hole 62c is formed to penetrate the main body 62a in the axial direction A, and the terminal 7A is inserted through it.
- the second protrusion 61f of the first holder 61A is inserted through the hole 62e.
- the part of the second protrusion 61f protruding from the hole 62e is crushed by heat or the like, and the second holder 62A is fixed to the first holder 61A by crimping with the second protrusion 61f.
- the terminals 7 are formed, for example, from a conductive metal.
- the motor 1A according to this embodiment has a plurality of terminals 7A (for example, three) as shown in Figures 10, 11, and 12.
- two of the three terminals 7A are arranged along the circumferential direction C, and the remaining terminal 7A is arranged at a position offset from the circumferential direction C relative to the other two terminals 7A. It is noted that all of the terminals 7A may be arranged along the circumferential direction C.
- the terminal 7A is inserted into the hole 61c of the first holder 61A and into the hole 62c of the second holder 62A. Furthermore, the terminal 7A inserted into the hole 51c of the first bus bar 51A is electrically connected to the first bus bar 51A. Furthermore, the terminal 7A is inserted into the hole 51c of the first bus bar 51A. Therefore, the first bus bar 51A is electrically connected to the terminal 7A. Furthermore, the first bus bar 51A is electrically connected to the coil 43, and the second bus bar 52A is electrically connected to the coil 43. As a result, a current flows from the terminal 7A to the coil 43 electrically connected to the first bus bar 51A, and a current flows to the coil 43 electrically connected to the second bus bar 52A.
- the cover 8 is formed, for example, from an insulating resin in a ring shape so as to cover the first bus bar 51 from one side in the axial direction A.
- the cover 8 has a main body 81a and a hole portion (not shown) formed in the main body 81a.
- the hole portion has a shape that penetrates the main body 81a in the axial direction A.
- the first protrusion portion 61d of the first holder 61A or the terminal 7A is inserted into the hole portion.
- the multiple terminals 7A are each arranged in a position away from the connection parts 51b, 521b, 522b of the busbar 5A in the radial direction R. Therefore, when electrically connecting the terminals 7A to the terminals of the external device, the operator's fingers can be prevented from coming into contact with the connection parts 51b, 521b, 522b, improving workability. Furthermore, in the motor 1A according to this embodiment, the multiple terminals 7A are arranged along the circumferential direction C, so that when electrically connecting one of the multiple terminals 7A to an external device, the remaining terminals 7A can be prevented from coming into contact with the operator's fingers, improving workability.
- the second protrusion 61f of the first holder 61A is inserted into the hole 522d of the other second bus bar 522.
- the motor 1A according to this embodiment may be provided with an engagement portion on the other second bus bar 52A, and the second holder 62A may be provided with a protrusion that can engage with the engagement portion, just like the motor 1 according to the first embodiment.
- the motor 1 according to the first embodiment and the motor 1A according to the second embodiment have been described as being of the inner rotor type.
- the motors 1 and 1A according to this embodiment are not limited to this.
- the motors 1 and 1A according to this embodiment can be applied to an outer rotor side in which the stator 4 is located inside the rotor 3 in the radial direction R when viewed from the axial direction A.
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
A motor (1) comprises: a stator (4) that has a plurality of coils (43); a plurality of busbars (5); and a holder (6) that holds the plurality of busbars (5). The holder (6) is provided with protruding sections (62d) that extend in the axial direction (A). The protruding sections (62d) and end sections of the busbars (5) are engaged in the circumferential direction (C).
Description
本発明は、モータに関する。
The present invention relates to a motor.
従来、モータの巻き線と、外部リード線とを接続するリードフレームを有するモールド端子台が知られている(例えば、特許文献1参照)。
Conventionally, a molded terminal block having a lead frame that connects the motor windings and external lead wires is known (see, for example, Patent Document 1).
リードフレームは、いわゆるバスバーであって、導電性の材料で、周方向に延在するように形成される。また、モールド端子台は、リードフレームを保持する絶縁製のホルダを備える。
The lead frame is a so-called bus bar, made of a conductive material and formed to extend in the circumferential direction. The molded terminal block also includes an insulating holder that holds the lead frame.
さらに、複数のバスバーを備えるモータにおいて、隣り合う2つのバスバーを周方向に配置する場合、2つのバスバー同士を絶縁するため、周方向において、2つのバスバーの間に所用の間隔が必要となる。
Furthermore, in a motor equipped with multiple bus bars, when two adjacent bus bars are arranged in the circumferential direction, a necessary gap is required between the two bus bars in the circumferential direction to insulate the two bus bars from each other.
そして、従来のモータにおいて、バスバーの周方向の端部に円形の孔を設ける一方、ホルダに当該孔に挿入されるピンを設け、ピンを孔に挿入することによって、バスバーをホルダに保持するものがあった。
In conventional motors, circular holes are provided at the circumferential ends of the busbar, and the holder has pins that are inserted into the holes, and the busbar is held in the holder by inserting the pins into the holes.
しかしながら、上述したモータには、大型化を抑制しつつ、周方向において隣り合う2つのバスバーの距離を確保する点に関して改善の余地がある。
However, there is room for improvement in the above-mentioned motor in terms of ensuring the distance between two adjacent bus bars in the circumferential direction while preventing the motor from becoming too large.
本発明は、上記の課題に鑑み、大型化を抑制しつつ、周方向において隣り合う2つのバスバーの距離を確保することができるモータを提供することにある。
In view of the above problems, the present invention aims to provide a motor that can ensure a sufficient distance between two adjacent bus bars in the circumferential direction while preventing the motor from becoming too large.
上述した課題を解決し、目的を達成するために、本発明に係るモータは、複数のコイルを有するステータと、複数のバスバーと、前記複数のバスバーを保持するホルダと、を備え、前記ホルダは、軸方向に延在する突出部が設けられており、周方向において、前記バスバーの端部と前記突出部とが係合している。
In order to solve the above problems and achieve the objectives, the motor of the present invention comprises a stator having multiple coils, multiple bus bars, and a holder that holds the multiple bus bars, the holder being provided with a protrusion that extends in the axial direction, and the ends of the bus bars and the protrusion engage in the circumferential direction.
一つの態様によれば、本発明に係るモータは、大型化を抑制しつつ、周方向において隣り合う2つのバスバーの距離を確保することができる。
According to one aspect, the motor of the present invention can ensure a sufficient distance between two adjacent bus bars in the circumferential direction while preventing the motor from becoming too large.
以下に、実施形態に係るモータを図面に基づいて詳細に説明する。なお、図面における各要素の寸法の関係、各要素の比率などは、現実と異なる場合がある。図面の相互間においても、互いの寸法の関係や比率が異なる部分が含まれている場合がある。
Below, a motor according to an embodiment will be described in detail with reference to the drawings. Note that the dimensional relationships and ratios of each element in the drawings may differ from the reality. There may also be parts in which the dimensional relationships and ratios differ between the drawings.
[第1実施形態]
図1は、第1実施形態に係るモータ1の斜視図である。図2は、図1に示すモータ1の平面図である。図3は、図1に示すモータ1が有するステータ4の斜視図である。図4は、図1に示すモータ1が備えるバスバー5を示す斜視図である。図5は、図1に示すモータ1が備えるホルダ6を示す斜視図である。図6は、図1に示すモータ1が有するステータ4、および、第2のバスバー52、および、第2のホルダ62を示す斜視図である。図7は、第2のホルダ62の一部および第2のバスバー52の一部を示す斜視図である。図8は、図1に示すモータ1が備える突出部62dおよび係合部522cを示す斜視図である。なお、図3で示すステータ4において、説明の便宜のため、コア40の一部を省略し、複数のティース41にうち一部のティース41の一部を省略してあり、複数のインシュレータ42のうち、一部のインシュレータ42を省略してあり、かつ、複数のコイル43のうち、一部のコイル43を省略してある。また、図6、図7において、説明の便宜のため、シャフト2およびロータ3を省略してある。さらに、図6および図7において、説明の便宜のため、第1のホルダ61および第1のバスバー51を省略してある。また、図8において、説明の便宜のため、第1のバスバー51を省略してあり、かつ、第1のホルダ61を仮想線で示してある。 [First embodiment]
FIG. 1 is a perspective view of a motor 1 according to a first embodiment. FIG. 2 is a plan view of the motor 1 shown in FIG. 1. FIG. 3 is a perspective view of astator 4 included in the motor 1 shown in FIG. 1. FIG. 4 is a perspective view of a bus bar 5 included in the motor 1 shown in FIG. 1. FIG. 5 is a perspective view of a holder 6 included in the motor 1 shown in FIG. 1. FIG. 6 is a perspective view of a stator 4, a second bus bar 52, and a second holder 62 included in the motor 1 shown in FIG. 1. FIG. 7 is a perspective view of a part of the second holder 62 and a part of the second bus bar 52. FIG. 8 is a perspective view of a protrusion 62d and an engagement portion 522c included in the motor 1 shown in FIG. 1. In the stator 4 shown in FIG. 3, for convenience of explanation, a part of the core 40 is omitted, some of the teeth 41 are omitted, some of the insulators 42 are omitted, and some of the coils 43 are omitted. For ease of explanation, the shaft 2 and the rotor 3 are omitted in Fig. 6 and Fig. 7. For ease of explanation, the first holder 61 and the first bus bar 51 are omitted in Fig. 6 and Fig. 7. For ease of explanation, the first bus bar 51 is omitted in Fig. 8, and the first holder 61 is shown by a virtual line.
図1は、第1実施形態に係るモータ1の斜視図である。図2は、図1に示すモータ1の平面図である。図3は、図1に示すモータ1が有するステータ4の斜視図である。図4は、図1に示すモータ1が備えるバスバー5を示す斜視図である。図5は、図1に示すモータ1が備えるホルダ6を示す斜視図である。図6は、図1に示すモータ1が有するステータ4、および、第2のバスバー52、および、第2のホルダ62を示す斜視図である。図7は、第2のホルダ62の一部および第2のバスバー52の一部を示す斜視図である。図8は、図1に示すモータ1が備える突出部62dおよび係合部522cを示す斜視図である。なお、図3で示すステータ4において、説明の便宜のため、コア40の一部を省略し、複数のティース41にうち一部のティース41の一部を省略してあり、複数のインシュレータ42のうち、一部のインシュレータ42を省略してあり、かつ、複数のコイル43のうち、一部のコイル43を省略してある。また、図6、図7において、説明の便宜のため、シャフト2およびロータ3を省略してある。さらに、図6および図7において、説明の便宜のため、第1のホルダ61および第1のバスバー51を省略してある。また、図8において、説明の便宜のため、第1のバスバー51を省略してあり、かつ、第1のホルダ61を仮想線で示してある。 [First embodiment]
FIG. 1 is a perspective view of a motor 1 according to a first embodiment. FIG. 2 is a plan view of the motor 1 shown in FIG. 1. FIG. 3 is a perspective view of a
第1実施形態に係るモータ1の説明において、方向の理解を容易にするため、後述するシャフト2が延びる方向を軸方向Aと呼び、後述するロータ3が回転する方向を周方向Cと呼び、軸方向Aに対して直交する平面に含まれ、かつ、シャフト2の軸心2oを通過し、周方向Cに対して直交する方向を径方向Rと呼ぶ。
In the explanation of the motor 1 according to the first embodiment, in order to make it easier to understand the directions, the direction in which the shaft 2 described later extends is called the axial direction A, the direction in which the rotor 3 described later rotates is called the circumferential direction C, and the direction that is included in a plane perpendicular to the axial direction A, passes through the axis 2o of the shaft 2, and is perpendicular to the circumferential direction C is called the radial direction R.
第1実施形態に係る図1に示すモータ1は、軸方向Aから視た場合、ロータ3を基準とすると、当該ロータ3の径方向Rの外側にステータ4が位置する一方、当該ロータ3の径方向Rの内側にシャフト2が位置するインナーロータ型である。
The motor 1 shown in FIG. 1 according to the first embodiment is an inner rotor type in which, when viewed from the axial direction A, the stator 4 is located outside the rotor 3 in the radial direction R, and the shaft 2 is located inside the rotor 3 in the radial direction R, with the rotor 3 being used as the reference.
第1実施形態に係るモータ1は、例えば電源からの電気エネルギーを、シャフト2の周方向Cへ回転する駆動力に変換する電動機である。モータ1は、例えば、図示しないフレームに収容される。
The motor 1 according to the first embodiment is, for example, an electric motor that converts electrical energy from a power source into a driving force that rotates the shaft 2 in the circumferential direction C. The motor 1 is housed, for example, in a frame (not shown).
モータ1は、例えば、シャフト2と、ロータ3と、ステータ4と、バスバー5と、ホルダ6と、端子7と、不図示のカバーと、を備える。シャフト2は、いわゆる回転軸であって、例えば、金属部材で軸方向Aに沿って延びる略円柱状に形成される。シャフト2は、軸心2oを有し(図2に参照)、かつ、当該軸心2oを中心に回転可能に設けられる。シャフト2は、周方向Cに回転することで動力を外部に伝達する。
The motor 1 includes, for example, a shaft 2, a rotor 3, a stator 4, a bus bar 5, a holder 6, terminals 7, and a cover (not shown). The shaft 2 is a so-called rotating shaft, and is formed, for example, from a metal member in a generally cylindrical shape extending along the axial direction A. The shaft 2 has an axis 2o (see FIG. 2), and is provided so as to be rotatable about the axis 2o. The shaft 2 transmits power to the outside by rotating in the circumferential direction C.
ロータ3は、シャフト2の軸心2oを中心に回転可能に設けられる。また、本実施形態に係るモータ1は、シャフト2とロータ3とを一体として形成してある。
The rotor 3 is rotatable about the axis 2o of the shaft 2. In the motor 1 according to this embodiment, the shaft 2 and the rotor 3 are formed as a single unit.
ロータ3は、図2に示すように、径方向Rにおいてステータ4の内側(シャフト2側)に配置される。つまり、このモータ1は、ステータ4の径方向Rの内側にロータ3が位置するインナーロータ型のブラシレスモータである。
As shown in FIG. 2, the rotor 3 is disposed inside the stator 4 (on the shaft 2 side) in the radial direction R. In other words, this motor 1 is an inner rotor type brushless motor in which the rotor 3 is located inside the stator 4 in the radial direction R.
ロータ3は、ヨーク31と、複数のマグネット32と、を有する。ヨーク31は、例えば鉄等の磁性材料で形成される。
The rotor 3 has a yoke 31 and multiple magnets 32. The yoke 31 is made of a magnetic material such as iron.
マグネット32は、例えば、永久磁石によって構成される。複数のマグネット32は、例えば、周方向Cに沿って等間隔に並べられる。本実施形態に係るロータ3は、例えば、14個のマグネット32を有する。
The magnets 32 are, for example, permanent magnets. The multiple magnets 32 are, for example, arranged at equal intervals along the circumferential direction C. The rotor 3 according to this embodiment has, for example, 14 magnets 32.
ステータ4は、ロータ3を周方向Cへ回転させるための力を発生させる部分である。ステータ4は、図3に示すように、例えば、1つのコア40と、複数のティース41と、複数のインシュレータ42と、複数のコイル43と、を備える。
The stator 4 is a part that generates a force for rotating the rotor 3 in the circumferential direction C. As shown in FIG. 3, the stator 4 includes, for example, one core 40, multiple teeth 41, multiple insulators 42, and multiple coils 43.
コア40は、例えば、ケイ素鋼板、電磁鋼板、軟磁性鋼板等の板状の磁性体(金属部材)を軸方向Aへ積層することによって形成され、磁性を有する。コア40は、軸方向Aから視た場合、環状に形成される。
The core 40 is formed by stacking plate-shaped magnetic bodies (metallic members) such as silicon steel plates, electromagnetic steel plates, soft magnetic steel plates, etc., in the axial direction A, and has magnetic properties. When viewed from the axial direction A, the core 40 is formed in an annular shape.
ティース41のそれぞれは、径方向Rにおいて、コア40の内周面からロータ3側へ突出するように形成される。本実施形態に係るステータ4は、例えば、18個のティース41を備える。
Each of the teeth 41 is formed to protrude from the inner peripheral surface of the core 40 toward the rotor 3 in the radial direction R. The stator 4 according to this embodiment has, for example, 18 teeth 41.
インシュレータ42は、例えば、絶縁性の樹脂等により形成されてティース41の表面に装着され、ティース41とコイル43との間の絶縁性を確保する。本実施形態に係るステータ4は、例えば、18個のインシュレータ42を備える。
The insulators 42 are formed, for example, from an insulating resin and are attached to the surfaces of the teeth 41 to ensure insulation between the teeth 41 and the coils 43. The stator 4 according to this embodiment includes, for example, 18 insulators 42.
コイル43は、例えば、インシュレータ42を介してティース41に巻線を巻き回して形成される。巻線は、導電性の芯線(不図示)と、芯線の周囲を被覆する絶縁性の被覆部(不図示)と、を有する。
The coil 43 is formed, for example, by winding a wire around the teeth 41 via an insulator 42. The wire has a conductive core (not shown) and an insulating coating (not shown) that covers the periphery of the core.
本実施形態に係るコイル43は、ティース41に巻線を巻き回すことで形成される。巻線は、ティース41に巻き回された部分43aと、両端部に位置してティース41から引き出された引出線43bとを有する。引出線43bは、バスバー5を介して例えば不図示の電源に対して電気的に接続される。つまり、コイル43は、電源(不図示)に対して電気的に接続される。本実施形態に係るステータ4は、例えば、18個のコイル43を有する。
The coils 43 according to this embodiment are formed by winding wire around the teeth 41. The winding has a portion 43a wound around the teeth 41 and lead wires 43b located at both ends and drawn out from the teeth 41. The lead wires 43b are electrically connected to, for example, a power source (not shown) via the bus bar 5. In other words, the coils 43 are electrically connected to a power source (not shown). The stator 4 according to this embodiment has, for example, 18 coils 43.
バスバー5は、例えば、導電性を有する金属によって形成される。本実施形態に係るモータ1は、図4に示すように、複数の第1のバスバー51(図1、図2参照)と、複数の第2のバスバー52(図6参照)と、を有する。
The busbar 5 is formed, for example, from a metal having electrical conductivity. As shown in FIG. 4, the motor 1 according to this embodiment has a plurality of first busbars 51 (see FIG. 1 and FIG. 2) and a plurality of second busbars 52 (see FIG. 6).
第1のバスバー51は、後述する第1のホルダ61に保持され、第1のホルダ61に対して軸方向Aの一方側に配置される(図1参照)。本実施形態に係るモータ1は、複数(例えば3個)の第1のバスバー51を有する。
The first bus bar 51 is held by a first holder 61, which will be described later, and is disposed on one side of the first holder 61 in the axial direction A (see FIG. 1). The motor 1 according to this embodiment has multiple (e.g., three) first bus bars 51.
第1のバスバー51における軸方向Aの他方側の裏面には、コイル43の引出線43bの端部が電気的に接続される。また、第1のバスバー51は、本体51aと、接続部51bと、孔部51cと、を有する。本体51aは、軸方向Aにおいて、第1のホルダ61の本体61aの表面に接触する。
The end of the lead wire 43b of the coil 43 is electrically connected to the back surface of the first bus bar 51 on the other side in the axial direction A. The first bus bar 51 also has a body 51a, a connection portion 51b, and a hole portion 51c. The body 51a contacts the surface of the body 61a of the first holder 61 in the axial direction A.
接続部51bは、本体51aから径方向Rの一方側(シャフト2から離れる側)に向けて突出し、その後、軸方向Aの一方側(ステータ4から離れる側)に向けて突出する。接続部51bには、例えば、コイル43の引出線43bが接続される。接続部51bは、径方向Rの外側に接続面51bfを有する。ところで、第1のバスバー51は、図1に示すように、ステータ4に対して軸方向Aの一方側に配置される。そのため、接続面51bfは、軸方向Aにおいて、ステータ4の外周部4oに隣接して配置される。
The connection portion 51b protrudes from the main body 51a toward one side in the radial direction R (the side away from the shaft 2), and then protrudes toward one side in the axial direction A (the side away from the stator 4). For example, the lead wire 43b of the coil 43 is connected to the connection portion 51b. The connection portion 51b has a connection surface 51bf on the outside in the radial direction R. Incidentally, the first busbar 51 is disposed on one side in the axial direction A with respect to the stator 4, as shown in FIG. 1. Therefore, the connection surface 51bf is disposed adjacent to the outer periphery 4o of the stator 4 in the axial direction A.
孔部51cは、図4に示すように、本体51aを軸方向Aに貫通する。本実施形態に係る第1のバスバー51は、複数の孔部51cを有する。複数の孔部51cのうちの一部は、第1のホルダ61に形成された第1突出部61dに係合し(図1参照)、複数の孔部51cのうちの残りの部分には、後述する端子7が挿通される(図1参照)。
As shown in FIG. 4, the holes 51c penetrate the main body 51a in the axial direction A. The first bus bar 51 according to this embodiment has a plurality of holes 51c. Some of the holes 51c engage with the first protrusion 61d formed on the first holder 61 (see FIG. 1), and the remaining holes 51c are inserted with terminals 7 (described later) (see FIG. 1).
第2のバスバー52は、後述する第2のホルダ62に保持され、かつ、第2のホルダ62における本体62aの軸方向Aの一方側に位置する表面上に配置される(図6参照)。本実施形態に係るモータ1は、複数(例えば15個)の第2のバスバー52を有する。
The second busbar 52 is held by a second holder 62, which will be described later, and is disposed on a surface located on one side of the body 62a of the second holder 62 in the axial direction A (see FIG. 6). The motor 1 according to this embodiment has multiple (e.g., 15) second busbars 52.
第2のバスバー52における軸方向Aの他方側の裏面は、コイル43の引出線43bの端部が電気的に接続される。本実施形態に係る第2のバスバー52は、第2のホルダ62に取り付けられた端子7から所定の距離だけ離れており、端子7に対して非接触である。
The other back surface of the second busbar 52 in the axial direction A is electrically connected to the end of the lead wire 43b of the coil 43. The second busbar 52 in this embodiment is a predetermined distance away from the terminal 7 attached to the second holder 62 and is not in contact with the terminal 7.
複数の第2のバスバー52には、周方向Cに延在する部分521a1と、径方向Rに延在する部分521a2とを有する本体521aを備える一方の第2のバスバー521、および、周方向Cに延在する部分で構成される本体522aを備える他方の第2のバスバー522が含まれる。
The multiple second bus bars 52 include one second bus bar 521 having a body 521a with a portion 521a1 extending in the circumferential direction C and a portion 521a2 extending in the radial direction R, and the other second bus bar 522 having a body 522a composed of a portion extending in the circumferential direction C.
一方の第2のバスバー521は、本体521aと、接続部521bと、孔部521cと、を有する。本体521aは、第2のホルダ62の本体62aに形成された溝部62bに挿入され、第2のホルダ62の本体62aに接触する。
The second bus bar 521 has a body 521a, a connection portion 521b, and a hole portion 521c. The body 521a is inserted into a groove portion 62b formed in the body 62a of the second holder 62, and comes into contact with the body 62a of the second holder 62.
接続部521bは、本体521aから径方向Rの一方側(シャフト2から離れる側)に向けて突出し、その後、軸方向Aの一方側(ステータ4から離れる側)に向けて突出する。接続部521bには、例えば、コイル43の引出線43bが接続される。接続部521bは、径方向Rの外側に向いた接続面521bfを有する。ところで、一方の第2のバスバー521は、図1に示すように、ステータ4に対して軸方向Aの一方側に配置される。そのため、接続面521bfは、軸方向Aにおいて、ステータ4の外周部4oに隣接して配置される。
The connection portion 521b protrudes from the main body 521a toward one side in the radial direction R (the side away from the shaft 2), and then protrudes toward one side in the axial direction A (the side away from the stator 4). For example, the lead wire 43b of the coil 43 is connected to the connection portion 521b. The connection portion 521b has a connection surface 521bf facing outward in the radial direction R. Meanwhile, one of the second bus bars 521 is disposed on one side in the axial direction A with respect to the stator 4, as shown in FIG. 1. Therefore, the connection surface 521bf is disposed adjacent to the outer periphery 4o of the stator 4 in the axial direction A.
孔部521cは、図4に示すように、本体521aを軸方向Aに貫通する。本実施形態に係る第2のバスバー52は、複数の孔部521cを有する。複数の孔部521cには、第2のホルダ62に形成された突出部62dが挿通される。
As shown in FIG. 4, the holes 521c penetrate the main body 521a in the axial direction A. The second bus bar 52 according to this embodiment has a plurality of holes 521c. The protrusions 62d formed on the second holder 62 are inserted into the plurality of holes 521c.
他方の第2のバスバー522は、本体522aと、接続部522bと、係合部522cと、を有する。本体522aは、第2のホルダ62の本体62aに形成された溝部62bに挿入され、第2のホルダ62の本体62aに接触する。
The other second bus bar 522 has a body 522a, a connection portion 522b, and an engagement portion 522c. The body 522a is inserted into a groove portion 62b formed in the body 62a of the second holder 62, and comes into contact with the body 62a of the second holder 62.
接続部522bは、本体522aから径方向Rの一方側(シャフト2から離れる側)に向けて突出し、その後、軸方向Aの一方側(ステータ4から離れる側)に向けて突出する。接続部522bには、例えば、他の機器の端子等が接続される。接続部522bは、径方向Rの外側に向いた接続面522bfを有する。ところで、他方の第2のバスバー522は、図1に示すように、ステータ4に対して軸方向Aの一方側に配置される。そのため、接続面522bfは、軸方向Aにおいて、ステータ4の外周部4oに隣接して配置される。
The connection portion 522b protrudes from the main body 522a toward one side in the radial direction R (the side away from the shaft 2), and then protrudes toward one side in the axial direction A (the side away from the stator 4). For example, a terminal of another device is connected to the connection portion 522b. The connection portion 522b has a connection surface 522bf facing outward in the radial direction R. Meanwhile, the other second busbar 522 is disposed on one side in the axial direction A with respect to the stator 4, as shown in FIG. 1. Therefore, the connection surface 522bf is disposed adjacent to the outer periphery 4o of the stator 4 in the axial direction A.
係合部522cは、本体522aの周方向Cの端部に形成される。また、本実施形態に係る係合部522cは、図7、図8に示すように、軸方向Aから視た場合、本体522aの径方向Rにおける中央に配置される。つまり、係合部522cは、図7に示すように、本体522aにおける中央線522CLを基準に、線対称に形成される。また係合部522cは、例えば、半円の弧状に形成される。そして、係合部522cは、図7、図8に示すように、周方向Cにおいて、接続部522bが配置された場所から外れた位置に配置される。そして、係合部522cは、後述する第2のホルダ62に形成された突出部62dに係合する。
The engaging portion 522c is formed at the end of the main body 522a in the circumferential direction C. The engaging portion 522c according to this embodiment is disposed at the center of the main body 522a in the radial direction R when viewed from the axial direction A, as shown in Figs. 7 and 8. That is, the engaging portion 522c is formed symmetrically with respect to the center line 522CL of the main body 522a, as shown in Fig. 7. The engaging portion 522c is formed, for example, in a semicircular arc shape. The engaging portion 522c is disposed at a position in the circumferential direction C away from the location where the connecting portion 522b is disposed, as shown in Figs. 7 and 8. The engaging portion 522c engages with a protrusion 62d formed on the second holder 62, which will be described later.
ホルダ6は、絶縁性を有する樹脂によって形成される。本実施形態に係るモータ1は、図5に示すように、第1のホルダ61(図1参照)と、第2のホルダ62(図6参照)と、を有する。
The holder 6 is made of insulating resin. As shown in FIG. 5, the motor 1 according to this embodiment has a first holder 61 (see FIG. 1) and a second holder 62 (see FIG. 6).
第1のホルダ61は、軸方向Aから視た場合、環状に形成され、径方向Rの最も内側に位置する内周縁61iと、径方向Rの最も外側に位置する外周縁61oと、を有する。
When viewed from the axial direction A, the first holder 61 is formed in an annular shape and has an inner peripheral edge 61i located at the innermost position in the radial direction R and an outer peripheral edge 61o located at the outermost position in the radial direction R.
第1のホルダ61は、本体61aと、本体61aにおける軸方向Aの一方側の表面に形成され、周方向Cに延在する壁部61bと、本体61aに形成された複数の孔部61cと、本体61aにおける軸方向Aの一方側の表面から、軸方向Aの一方側へ突出する第1突出部61dと、本体61aにおける軸方向Aの他方側の裏面から、軸方向Aの他方側にある第2のホルダ62に向けて突出する第2突出部61fと、を有する。その上、第1のホルダ61は、本体61aにおける軸方向Aの他方側の裏面に形成され、軸方向Aにおいて、裏面から表面へ向けて凹む不図示の凹部を有する。凹部は、図示省略するが、本体61aに複数形成される。
The first holder 61 has a main body 61a, a wall portion 61b formed on the surface of one side of the main body 61a in the axial direction A and extending in the circumferential direction C, a plurality of holes 61c formed in the main body 61a, a first protrusion 61d protruding from the surface of one side of the main body 61a in the axial direction A to one side in the axial direction A, and a second protrusion 61f protruding from the back surface of the main body 61a on the other side in the axial direction A toward the second holder 62 on the other side in the axial direction A. In addition, the first holder 61 has a recess (not shown) formed on the back surface of the other side of the main body 61a in the axial direction A and recessed from the back surface to the front surface in the axial direction A. Although not shown, a plurality of recesses are formed in the main body 61a.
壁部61bは、複数の第1のバスバー51の間に配置される。つまり、第1のホルダ61は、周方向Cに延在する複数の壁部61bを有する。壁部61bは、第1のホルダ61における本体61aの軸方向Aの一方側の表面において、軸方向Aの一方側へ突出するように形成される。そのため、第1のホルダ61の径方向Rにおける大きさが大型化することを抑制しながら、壁部61bによって、複数の第1のバスバー51のうち、一方の第1のバスバー51と他方の第1のバスバー51との間の沿面距離を長くすることができる。
The wall portions 61b are disposed between the multiple first bus bars 51. That is, the first holder 61 has multiple wall portions 61b extending in the circumferential direction C. The wall portions 61b are formed on the surface of one side of the axial direction A of the main body 61a of the first holder 61 so as to protrude to one side in the axial direction A. Therefore, the wall portions 61b can increase the creepage distance between one first bus bar 51 and the other first bus bar 51 among the multiple first bus bars 51, while preventing the size of the first holder 61 in the radial direction R from increasing.
孔部61cは、例えば、本体61aを軸方向Aにおいて貫通するように形成される。孔部61cは、例えば、円形に形成され、軸方向Aにおいて端子7が挿通される。
The hole 61c is formed, for example, so as to penetrate the main body 61a in the axial direction A. The hole 61c is formed, for example, in a circular shape, and the terminal 7 is inserted through the hole 61c in the axial direction A.
第1突出部61dは、例えば、円柱状に形成され、かつ、第1のバスバー51の孔部51cに挿通される。第1突出部61dは、孔部51cに挿通された後、第1突出部61dの先端部が潰される。潰された第1突出部61dの先端は、孔部51cの大きさよりも大きくなっている。このため、第1突出部61dにより、第1のホルダ61から第1のバスバー51が脱落することを防止できる。
The first protrusion 61d is formed, for example, in a cylindrical shape, and is inserted into the hole 51c of the first busbar 51. After the first protrusion 61d is inserted into the hole 51c, the tip of the first protrusion 61d is crushed. The crushed tip of the first protrusion 61d is larger than the size of the hole 51c. Therefore, the first protrusion 61d can prevent the first busbar 51 from falling off the first holder 61.
第2のホルダ62は、軸方向Aから視た場合、環状に形成され、径方向Rにおいて最も内側に位置する内周縁62iと、径方向Rにおいて最も外側に位置する外周縁62oと、を有する。
When viewed from the axial direction A, the second holder 62 is formed in an annular shape and has an inner peripheral edge 62i that is located on the innermost side in the radial direction R, and an outer peripheral edge 62o that is located on the outermost side in the radial direction R.
第2のホルダ62は、本体62aと、本体62aにおける軸方向Aの一方側の表面に形成された溝部(凹部)62bと、本体62aに形成された複数の孔部62cと、本体61aにおける軸方向Aの一方側の表面から、軸方向Aの一方側へ突出する突出部62dと、本体62aにおける軸方向Aの一方側の表面に形成され、軸方向Aの他方側へ向けて凹む凹部62fと、を有する。
The second holder 62 has a main body 62a, a groove portion (recess) 62b formed on the surface of one side of the main body 62a in the axial direction A, a plurality of holes 62c formed in the main body 62a, a protrusion 62d protruding from the surface of one side of the main body 61a in the axial direction A to one side in the axial direction A, and a recess 62f formed on the surface of one side of the main body 62a in the axial direction A and recessed toward the other side in the axial direction A.
溝部62bは、本体62aにおける軸方向Aの一方側の表面から他方側への裏面へ向けて凹むように形成され、第2のバスバー52の本体521a、522aを収容可能に形成される。このような溝部62bは、ホルダ6に複数形成される。また、溝部62bは、周方向Cに延在する部分と、径方向Rに延在する部分と、を有する。
The groove 62b is formed to be recessed from the surface on one side of the main body 62a in the axial direction A to the back surface on the other side, and is formed to be able to accommodate the main bodies 521a, 522a of the second busbar 52. A plurality of such grooves 62b are formed in the holder 6. The groove 62b also has a portion that extends in the circumferential direction C and a portion that extends in the radial direction R.
孔部62cは、例えば、本体62aを軸方向Aにおいて貫通するように形成される。孔部62cは、例えば、円形に形成される。
The hole 62c is formed, for example, so as to penetrate the main body 62a in the axial direction A. The hole 62c is formed, for example, in a circular shape.
突出部62dは、例えば、円柱状に形成される。つまり、突出部62dは、軸方向Aから視た場合、円形に形成される。本実施形態に係る第2のホルダ62は、複数の突出部62dを有する。複数の突出部62dのうちの一部は、一方の第2のバスバー521の孔部521cに挿通させ、複数の突出部62dのうちの残りは、他方の第2のバスバー522の係合部522cに係合させる。その後、作業者は、第1のホルダ61における軸方向Aの他方側の裏面に形成された凹部に突出部62dを係合させる。そのため、第2のホルダ62に複数の第2のバスバー52を保持させた後、第2のホルダ62の突出部62dを、第1のホルダ61の凹部に係合させれば、軸方向Aにおいて、第1のホルダ61と第2のホルダ62との間に第2のバスバー52を挟持した状態において、第2のホルダ62に第1のホルダ61を組み付けることができる。なお、突出部62dは、孔部521cに挿通させ、係合部522cに係合させた後、当該第1突出部61dの先端部を潰すことで、第2のホルダ62から第2のバスバー52が脱落することを防止するように構成してもよい。凹部62fには、第2突出部61fが嵌合され、凹部62fおよび第2突出部61fによって、第2のホルダ62に第1のホルダ61が組み付けられる。
The protrusion 62d is formed, for example, in a cylindrical shape. That is, the protrusion 62d is formed in a circular shape when viewed from the axial direction A. The second holder 62 in this embodiment has multiple protrusions 62d. Some of the multiple protrusions 62d are inserted into the hole portions 521c of one of the second bus bars 521, and the remainder of the multiple protrusions 62d are engaged with the engagement portions 522c of the other second bus bar 522. The worker then engages the protrusions 62d with a recess formed on the back surface of the first holder 61 on the other side in the axial direction A. Therefore, after the second holder 62 holds the second bus bars 52, the protrusion 62d of the second holder 62 is engaged with the recess of the first holder 61, and the first holder 61 can be assembled to the second holder 62 in a state in which the second bus bars 52 are sandwiched between the first holder 61 and the second holder 62 in the axial direction A. The protrusion 62d may be inserted into the hole 521c, engaged with the engagement portion 522c, and then the tip of the first protrusion 61d may be crushed to prevent the second bus bars 52 from falling off the second holder 62. The second protrusion 61f is fitted into the recess 62f, and the first holder 61 is assembled to the second holder 62 by the recess 62f and the second protrusion 61f.
端子7は、例えば、導電性を有する金属によって形成される。本実施形態に係るモータ1は、図1、図2、図4、図5に示すように、複数の端子7(例えば3個)を有する。
The terminals 7 are formed, for example, from a conductive metal. The motor 1 according to this embodiment has multiple terminals 7 (for example, three terminals) as shown in Figures 1, 2, 4, and 5.
端子7は、例えば、軸方向Aに延在するように円柱状に形成される。そして、端子7は、第1のホルダ61の孔部61cに挿通され、かつ、第2のホルダ62の孔部62cに挿通されるとともに、例えば、軸方向Aの他方側の端部が第2のホルダ62に固定される。端子7のそれぞれは、バスバー5と、不図示の外部装置とを電気的に接続する。本実施形態に係るモータ1は、複数の端子7を径方向Rに沿って配置してある。また、複数の端子7は、第2のホルダ62の内周縁62iと外周縁62oとの間に配置されている。さらに、複数の端子7は、周方向Cにおいて複数の接続面521bf、522bfから外れた位置に配置される。別の言い方をすると、複数の端子7は、径方向Rから視た場合において、複数の接続面521bf、522bfに重ならない位置に配置される。
The terminal 7 is formed, for example, in a cylindrical shape extending in the axial direction A. The terminal 7 is inserted into the hole 61c of the first holder 61 and into the hole 62c of the second holder 62, and the other end of the terminal 7 in the axial direction A is fixed to the second holder 62, for example. Each of the terminals 7 electrically connects the bus bar 5 to an external device (not shown). In the motor 1 according to this embodiment, the multiple terminals 7 are arranged along the radial direction R. The multiple terminals 7 are also arranged between the inner peripheral edge 62i and the outer peripheral edge 62o of the second holder 62. Furthermore, the multiple terminals 7 are arranged in a position that is deviated from the multiple connection surfaces 521bf, 522bf in the circumferential direction C. In other words, the multiple terminals 7 are arranged in a position that does not overlap the multiple connection surfaces 521bf, 522bf when viewed from the radial direction R.
カバーは、例えば、絶縁性の樹脂によって、第1のホルダ61および第1のバスバー51を軸方向Aの一方側から覆うように環状に形成しても構わない。
The cover may be formed, for example, from an insulating resin in a ring shape so as to cover the first holder 61 and the first bus bar 51 from one side in the axial direction A.
以上に説明したように、本実施形態に係るモータ1において、第2のホルダ62は、軸方向Aに延在する突出部62dが設けられており、周方向Cにおいて、第2のバスバー52の端部に位置する係合部522cと突出部62dとが係合している。そして、係合部522cは、軸方向Aから視た場合、半円の弧状に形成される。仮に、係合部が、本体522aを軸方向Aに貫通する孔部で構成された場合、突出部62dの全周を囲むように係合部が位置することになる。そして、絶縁性を確保するため、係合部を有する第2のバスバー52の端部と、周方向Cにおいて、当該第2のバスバー52に隣接する別のバスバー5の端部との距離を確保する必要があるから、モータ1が周方向Cに大型化するおそれがある。一方、本実施形態に係るモータ1において、係合部522cは、軸方向Aから視た場合、半円の弧状に形成されるため、周方向Cの大型化を抑制しつつ、係合部522cを有する第2のバスバー52と、当該第2のバスバー52に対して周方向Cに隣接する別のバスバー5との距離を確保することができる。
As described above, in the motor 1 according to this embodiment, the second holder 62 is provided with a protrusion 62d extending in the axial direction A, and the engagement portion 522c located at the end of the second bus bar 52 and the protrusion 62d are engaged in the circumferential direction C. The engagement portion 522c is formed in a semicircular arc when viewed from the axial direction A. If the engagement portion were configured as a hole that penetrates the main body 522a in the axial direction A, the engagement portion would be positioned so as to surround the entire circumference of the protrusion 62d. In order to ensure insulation, it is necessary to ensure a distance between the end of the second bus bar 52 having the engagement portion and the end of another bus bar 5 adjacent to the second bus bar 52 in the circumferential direction C, which may cause the motor 1 to become larger in the circumferential direction C. On the other hand, in the motor 1 according to this embodiment, the engaging portion 522c is formed in a semicircular arc shape when viewed from the axial direction A, so that the distance between the second bus bar 52 having the engaging portion 522c and another bus bar 5 adjacent to the second bus bar 52 in the circumferential direction C can be secured while preventing the bus bar 52 from becoming too large in the circumferential direction C.
本実施形態に係るモータ1において、外部装置と電気的に接続する複数の端子7を備え、第2のホルダ62は、当該第2のホルダ62の径方向Rにおいて、内周縁62iと、外周縁62oとを有し、複数の端子7は、内周縁62iと外周縁62oとの間に配置されている。
The motor 1 according to this embodiment is provided with a plurality of terminals 7 that are electrically connected to an external device, and the second holder 62 has an inner peripheral edge 62i and an outer peripheral edge 62o in the radial direction R of the second holder 62, and the plurality of terminals 7 are disposed between the inner peripheral edge 62i and the outer peripheral edge 62o.
本実施形態に係る第2のバスバー52は、ステータ4の外周部4oに配置された複数の接続面521bf、522bfを備え、複数のコイル43は、複数の接続面521bf、522bfに接続される。そのため、接続面521bf、522bfに他の機器の端子を接続する際、作業者の指が接続面521bf、522bfに対して容易に届くため、作業性を向上することができる。
The second busbar 52 according to this embodiment has multiple connection surfaces 521bf, 522bf arranged on the outer periphery 4o of the stator 4, and the multiple coils 43 are connected to the multiple connection surfaces 521bf, 522bf. Therefore, when connecting the terminals of other devices to the connection surfaces 521bf, 522bf, the worker's fingers can easily reach the connection surfaces 521bf, 522bf, improving workability.
本実施形態に係るモータ1において、端子7は、周方向Cにおいて複数の接続面521bf、522bfから外れた位置に配置される。そのため、端子7に外部装置を接続する際、作業者の指に接続面521bf、522bfが接触することを抑制することができ、作業性を向上することができる。
In the motor 1 according to this embodiment, the terminal 7 is disposed at a position that is offset from the multiple connection surfaces 521bf, 522bf in the circumferential direction C. Therefore, when connecting an external device to the terminal 7, it is possible to prevent the connection surfaces 521bf, 522bf from coming into contact with the fingers of an operator, thereby improving workability.
本実施形態に係るバスバー5は、周方向Cに沿って、第1のバスバー51の接続部51bと、第2のバスバー52の接続部521b、522bとを並べて配置してある。そのため、径方向Rにおいて、第1のバスバー51の接続部51bの一部と、第2のバスバー52の接続部521b、522bの一部とが重なることを防止することができる。そのため、本実施形態に係るバスバー5は、接続部51b、521b、522bに、他の機器の端子を接続する際において、接続対象でない他の接続部51b、521b、522bが邪魔になることがない。その結果、本実施形態に係るバスバー5は、接続部51b、521b、522bに他の機器の端子を接続する際において、作業性が低下することを抑制することができる。
In the busbar 5 according to this embodiment, the connection portion 51b of the first busbar 51 and the connection portions 521b, 522b of the second busbar 52 are arranged side by side along the circumferential direction C. This makes it possible to prevent a part of the connection portion 51b of the first busbar 51 from overlapping with a part of the connection portions 521b, 522b of the second busbar 52 in the radial direction R. Therefore, in the busbar 5 according to this embodiment, when connecting terminals of other devices to the connection portions 51b, 521b, 522b, the other connection portions 51b, 521b, 522b that are not to be connected do not get in the way. As a result, in the busbar 5 according to this embodiment, it is possible to suppress a decrease in workability when connecting terminals of other devices to the connection portions 51b, 521b, 522b.
なお、上述した実施形態に係る係合部522cは、軸方向Aから視た場合、半円の弧状に形成されるものを説明した。しかし、本実施形態に係る係合部522cの形状は、それに限られない。係合部522cは、軸方向Aから視た場合、例えば、楕円の半分の曲線状、または、長円の半分の曲線状等、周方向Cにおいて、他方の第2のバスバー522の本体522a側に向けて凹む曲線状に形成してもよい。
The engaging portion 522c in the above embodiment has been described as being formed in a semicircular arc shape when viewed from the axial direction A. However, the shape of the engaging portion 522c in this embodiment is not limited to this. When viewed from the axial direction A, the engaging portion 522c may be formed in a curved shape that is concave in the circumferential direction C toward the main body 522a of the other second bus bar 522, such as a curved shape that is half an ellipse or half an oval.
また、上述した実施形態に係る突出部62dは、円柱状に形成され、かつ、軸方向Aから視た場合、円形に形成されるものを説明した。しかし、本実施形態に係る突出部62dの形状は、係合部522cに係合可能であればそれに限られない。すなわち、突出部62dは、本体62aから軸方向Aの一方側へ向けて突出する柱状に形成され、かつ、係合部522cに係合可能であればよい。突出部62dは、軸方向Aから視た場合、例えば、楕円を半分にした形状、長円を半分にした形状、長方形状等でもよい。
The protrusion 62d in the above embodiment is formed in a cylindrical shape and is formed in a circular shape when viewed from the axial direction A. However, the shape of the protrusion 62d in this embodiment is not limited to this as long as it can engage with the engagement portion 522c. In other words, the protrusion 62d may be formed in a cylindrical shape that protrudes from the main body 62a toward one side in the axial direction A and can engage with the engagement portion 522c. When viewed from the axial direction A, the protrusion 62d may be, for example, in the shape of a half ellipse, a half oval, a rectangle, etc.
さらに、上述した実施形態に係るモータ1において、他方の第2のバスバー522が、第2のホルダ62の突出部62dに係合する係合部522cを備えるものを説明した。しかし、本実施形態に係るモータ1は、それに限られない。例えば、一方の第2のバスバー521が、第2のホルダ62の突出部62dに係合する係合部を備えてもよいし、第1のバスバー51が、第1のホルダ61の第1突出部61dに係合する係合部を備えてもよい。その上、第1のホルダ61において、軸方向Aの他方側に突出部を設け、当該突出部に対して第2のバスバー522の係合部522cが係合してもよい。
Furthermore, in the motor 1 according to the embodiment described above, the other second bus bar 522 has been described as having an engagement portion 522c that engages with the protrusion 62d of the second holder 62. However, the motor 1 according to the present embodiment is not limited to this. For example, one second bus bar 521 may have an engagement portion that engages with the protrusion 62d of the second holder 62, or the first bus bar 51 may have an engagement portion that engages with the first protrusion 61d of the first holder 61. Furthermore, a protrusion may be provided on the other side of the axial direction A in the first holder 61, and the engagement portion 522c of the second bus bar 522 may engage with the protrusion.
[第2実施形態]
次に、第2実施形態に係るモータ1Aに関して図9~図13を用いて説明する。図9は、第2実施形態に係るモータ1Aの斜視図である。図10は、図9に示すモータ1Aが備えるバスバー5Aを示す斜視図である。図11は、図9に示すモータ1Aの平面図である。図12は、図9に示すモータ1Aが備えるホルダ6Aを示す斜視図である。図13は、図9に示すモータ1Aが有するステータ4、第2のバスバー52A、および、第2のホルダ62Aを示す斜視図である。なお、第2実施形態に係るモータ1Aの構成において、第1実施形態に係るモータ1と同一の構成については、同一の符号を付して説明を省略する。さらに、図11において、説明の便宜のため、第1のホルダ61Aの軸方向Aの一方側を覆うカバー8を省略してある。なお、第2の実施形態に係るモータ1Aのバスバー5Aと、ホルダ6Aと、端子7Aとが、第1の実施形態に係るモータ1のバスバー5と、ホルダ6と、端子7と異なる。 [Second embodiment]
Next, themotor 1A according to the second embodiment will be described with reference to FIGS. 9 to 13. FIG. 9 is a perspective view of the motor 1A according to the second embodiment. FIG. 10 is a perspective view showing the bus bar 5A included in the motor 1A shown in FIG. 9. FIG. 11 is a plan view of the motor 1A shown in FIG. 9. FIG. 12 is a perspective view showing the holder 6A included in the motor 1A shown in FIG. 9. FIG. 13 is a perspective view showing the stator 4, the second bus bar 52A, and the second holder 62A included in the motor 1A shown in FIG. 9. Note that in the configuration of the motor 1A according to the second embodiment, the same configuration as that of the motor 1 according to the first embodiment is given the same reference numerals and the description thereof will be omitted. Furthermore, in FIG. 11, for convenience of explanation, the cover 8 covering one side of the first holder 61A in the axial direction A is omitted. Note that the bus bar 5A, the holder 6A, and the terminal 7A of the motor 1A according to the second embodiment are different from the bus bar 5, the holder 6, and the terminal 7 of the motor 1 according to the first embodiment.
次に、第2実施形態に係るモータ1Aに関して図9~図13を用いて説明する。図9は、第2実施形態に係るモータ1Aの斜視図である。図10は、図9に示すモータ1Aが備えるバスバー5Aを示す斜視図である。図11は、図9に示すモータ1Aの平面図である。図12は、図9に示すモータ1Aが備えるホルダ6Aを示す斜視図である。図13は、図9に示すモータ1Aが有するステータ4、第2のバスバー52A、および、第2のホルダ62Aを示す斜視図である。なお、第2実施形態に係るモータ1Aの構成において、第1実施形態に係るモータ1と同一の構成については、同一の符号を付して説明を省略する。さらに、図11において、説明の便宜のため、第1のホルダ61Aの軸方向Aの一方側を覆うカバー8を省略してある。なお、第2の実施形態に係るモータ1Aのバスバー5Aと、ホルダ6Aと、端子7Aとが、第1の実施形態に係るモータ1のバスバー5と、ホルダ6と、端子7と異なる。 [Second embodiment]
Next, the
本実施形態に係るモータ1Aは、図9に示すように、シャフト2と、ロータ3と、ステータ4と、バスバー5Aと、ホルダ6Aと、端子7Aと、カバー8と、を備える。
As shown in FIG. 9, the motor 1A according to this embodiment includes a shaft 2, a rotor 3, a stator 4, a bus bar 5A, a holder 6A, a terminal 7A, and a cover 8.
第2実施形態に係るバスバー5Aは、第1実施形態に係るバスバー5と同様、図10に示すように、第1のバスバー51Aと、第2のバスバー52Aと、を有する。
The busbar 5A according to the second embodiment, like the busbar 5 according to the first embodiment, has a first busbar 51A and a second busbar 52A, as shown in FIG. 10.
第1のバスバー51Aは、モータ1Aに複数設けられる。第1のバスバー51Aは、本体51aと、接続部51bと、孔部51cと、孔部51dと、を有する。
The motor 1A is provided with multiple first bus bars 51A. The first bus bar 51A has a body 51a, a connection portion 51b, a hole portion 51c, and a hole portion 51d.
孔部51cは、本体51aを軸方向Aに貫通する。本実施形態に係る第1のバスバー51Aは、複数の孔部51cを有する。孔部51cは、軸方向Aから視た場合、接続部51bに対して孔部51dより離れて配置される。複数の孔部51cの一部は、第1のホルダ61Aに形成された第1突出部61dに挿通され、複数の孔部51cのうちの残りの部分には、端子7Aが挿通される。
The hole 51c penetrates the main body 51a in the axial direction A. The first bus bar 51A according to this embodiment has a plurality of holes 51c. When viewed from the axial direction A, the hole 51c is positioned farther away from the connection portion 51b than the hole 51d. Some of the plurality of holes 51c are inserted into the first protrusion 61d formed on the first holder 61A, and the terminal 7A is inserted into the remaining portion of the plurality of holes 51c.
孔部51dは、本体51aを軸方向Aに貫通する。孔部51dの径方向の大きさは、孔部51cの径方向の大きさと異なる。より具体的に説明すると、孔部51dの径方向の大きさは、孔部51cの径方向の大きさより小さい。本実施形態に係る第1のバスバー51Aは、複数の孔部51dを有する。孔部51dは、径方向Rにおいて、接続部51bに隣接して配置される。そして、孔部51dには、引出線43bが挿通され、引出線43bと第1のバスバー51Aとが電気的に接続される。
The hole 51d penetrates the main body 51a in the axial direction A. The radial size of the hole 51d is different from the radial size of the hole 51c. More specifically, the radial size of the hole 51d is smaller than the radial size of the hole 51c. The first bus bar 51A according to this embodiment has a plurality of holes 51d. The hole 51d is disposed adjacent to the connection portion 51b in the radial direction R. The lead wire 43b is inserted into the hole 51d, and the lead wire 43b and the first bus bar 51A are electrically connected.
第2のバスバー52Aは、モータ1Aに複数設けられる。複数の第2のバスバー52には、周方向Cに延在する部分521a1と、径方向Rに延在する部分521a2と、を有する本体521aを備える一方の第2のバスバー521、および、周方向Cに延在する部分で構成される本体522aを有する他方の第2のバスバー522が含まれる。
The motor 1A is provided with a plurality of second bus bars 52A. The plurality of second bus bars 52 include a second bus bar 521 having a body 521a with a portion 521a1 extending in the circumferential direction C and a portion 521a2 extending in the radial direction R, and a second bus bar 522 having a body 522a composed of a portion extending in the circumferential direction C.
一方の第2のバスバー521は、本体521aと、接続部521bと、孔部521cと、孔部521dと、を有する。本体521aは、第2のホルダ62Aの本体62aにおける軸方向Aの一方側の表面に配置され、第2のホルダ62Aの本体62aに接触する。
The second bus bar 521 has a body 521a, a connection portion 521b, a hole portion 521c, and a hole portion 521d. The body 521a is disposed on one surface of the body 62a of the second holder 62A in the axial direction A, and is in contact with the body 62a of the second holder 62A.
孔部521cは、本体521aを軸方向Aに貫通する。本実施形態に係る一方の第2のバスバー521は、複数の孔部521cを有する。孔部521cは、軸方向Aから視た場合、接続部521bに対して孔部521dより離れて配置される。孔部521cは、軸方向Aにおいて、第1のホルダ61Aに形成された第2突出部61fに係合する。
The hole 521c penetrates the main body 521a in the axial direction A. In this embodiment, one of the second bus bars 521 has multiple holes 521c. When viewed from the axial direction A, the hole 521c is positioned farther away from the connection portion 521b than the hole 521d. The hole 521c engages with the second protrusion 61f formed on the first holder 61A in the axial direction A.
孔部521dは、本体521aを軸方向Aに貫通する。孔部521dの径方向の大きさは、孔部521cの径方向の大きさより小さい。本実施形態に係る一方の第2のバスバー521は、複数の孔部521dを有する。孔部521dは、接続部521bに隣接して配置される。そして、孔部521dには、引出線43bが挿通され、引出線43bと一方の第2のバスバー521とが電気的に接続される。
The hole 521d penetrates the main body 521a in the axial direction A. The radial size of the hole 521d is smaller than the radial size of the hole 521c. The one second bus bar 521 according to this embodiment has a plurality of holes 521d. The hole 521d is disposed adjacent to the connection portion 521b. The lead wire 43b is inserted into the hole 521d, and the lead wire 43b and the one second bus bar 521 are electrically connected.
他方の第2のバスバー522は、本体522aと、接続部522bと、孔部522dと、孔部522eと、を有する。本体522aは、第2のホルダ62Aの本体62aに配置され、第2のホルダ62Aの本体62aに接触する。
The other second bus bar 522 has a body 522a, a connection portion 522b, a hole portion 522d, and a hole portion 522e. The body 522a is disposed in the body 62a of the second holder 62A and contacts the body 62a of the second holder 62A.
孔部522dは、本体522aを軸方向Aに貫通する形状を備えている。本実施形態に係る第2のバスバー52Aは、複数の孔部522dを有する。また、孔部522dは、軸方向Aにおいて、第1のホルダ61Aに形成された第2突出部61fに係合する。
The hole 522d has a shape that penetrates the main body 522a in the axial direction A. The second bus bar 52A according to this embodiment has multiple holes 522d. Furthermore, the hole 522d engages with the second protrusion 61f formed on the first holder 61A in the axial direction A.
孔部522eは、本体521aを軸方向Aに貫通する。孔部522eの径方向の大きさは、孔部522dの径方向の大きさより小さい。本実施形態に係る他方の第2のバスバー522は、複数の孔部522eを有する。孔部522eは、接続部522bに隣接して配置される。そして、孔部522eには、引出線43bが挿通され、引出線43bと他方の第2のバスバー522とが電気的に接続される。
The hole 522e penetrates the main body 521a in the axial direction A. The radial size of the hole 522e is smaller than the radial size of the hole 522d. The other second bus bar 522 according to this embodiment has a plurality of holes 522e. The hole 522e is disposed adjacent to the connection portion 522b. The lead wire 43b is inserted into the hole 522e, and the lead wire 43b and the other second bus bar 522 are electrically connected.
第2実施形態に係るホルダ6Aは、第1実施形態に係るホルダ6と同様、図12に示すように、第1のホルダ61Aと、第2のホルダ62Aと、を有する。第2のホルダ62Aは、第1のホルダ61Aを覆うカバーとなっている。
The holder 6A according to the second embodiment, like the holder 6 according to the first embodiment, has a first holder 61A and a second holder 62A as shown in FIG. 12. The second holder 62A serves as a cover that covers the first holder 61A.
第1のホルダ61Aは、本体61aと、溝部(凹部)61eと、孔部61cと、第1突出部61dと、第2突出部61fと、を有する。
The first holder 61A has a main body 61a, a groove portion (recess) 61e, a hole portion 61c, a first protrusion 61d, and a second protrusion 61f.
溝部61eは、本体61aにおける軸方向Aの一方側の表面に形成され、かつ、軸方向Aにおいて、本体61aにおける一方側の表面から、他方側の裏面へ向けて凹むように形成される。溝部61eは、周方向Cに延在する部分と、径方向Rに延在する部分と、を有する。
The groove portion 61e is formed on one surface of the main body 61a in the axial direction A, and is formed so as to be recessed from the surface on one side of the main body 61a to the back surface on the other side in the axial direction A. The groove portion 61e has a portion extending in the circumferential direction C and a portion extending in the radial direction R.
孔部61cは、本体61aを軸方向Aに貫通するように形成される。第1突出部61dは、本体61aにおける軸方向Aの一方側の表面から、軸方向Aの一方側へ突出する。第2突出部61fは、本体61aにおける軸方向Aの他方側の裏面から、軸方向Aの他方側へ突出する。
The hole 61c is formed to penetrate the main body 61a in the axial direction A. The first protrusion 61d protrudes from the surface of the main body 61a on one side in the axial direction A to one side in the axial direction A. The second protrusion 61f protrudes from the back surface of the main body 61a on the other side in the axial direction A to the other side in the axial direction A.
第2のホルダ62Aは、本体62aと、孔部62cと、孔部62eと、を有する。孔部62cは、本体62aを軸方向Aに貫通するように形成され、端子7Aが挿通される。孔部62eには、第1のホルダ61Aの第2突出部61fが挿通される。第2突出部61fにおいて、孔部62eから突出した部分は、熱などにより潰され、第2のホルダ62Aを第1のホルダ61Aに第2突出部61fでカシメられ固定される。
The second holder 62A has a main body 62a, a hole 62c, and a hole 62e. The hole 62c is formed to penetrate the main body 62a in the axial direction A, and the terminal 7A is inserted through it. The second protrusion 61f of the first holder 61A is inserted through the hole 62e. The part of the second protrusion 61f protruding from the hole 62e is crushed by heat or the like, and the second holder 62A is fixed to the first holder 61A by crimping with the second protrusion 61f.
端子7は、例えば、導電性を有する金属によって形成される。本実施形態に係るモータ1Aは、図10、図11、図12に示すように、複数の端子7A(例えば3個)を有する。本実施形態に係るモータ1Aは、3個の端子7Aのうち2個の端子7Aを周方向Cに沿って配置してあり、残りの1個の端子7Aは、2個の端子7Aに対して周方向Cから外れた位置に配置してある。なお、すべての端子7Aを周方向Cに沿って配置してもよい。
The terminals 7 are formed, for example, from a conductive metal. The motor 1A according to this embodiment has a plurality of terminals 7A (for example, three) as shown in Figures 10, 11, and 12. In the motor 1A according to this embodiment, two of the three terminals 7A are arranged along the circumferential direction C, and the remaining terminal 7A is arranged at a position offset from the circumferential direction C relative to the other two terminals 7A. It is noted that all of the terminals 7A may be arranged along the circumferential direction C.
端子7Aは、第1のホルダ61Aの孔部61cに挿通され、かつ、第2のホルダ62Aの孔部62cに挿通される。その上、第1のバスバー51Aの孔部51cに挿通された端子7Aは、第1のバスバー51Aに対して電気的に接続される。また、第1のバスバー51Aの孔部51cに端子7Aが挿通されている。そのため、第1のバスバー51Aは、端子7Aに対して電気的に接続される。また、第1のバスバー51Aは、コイル43に対して電気的に接続され、かつ、第2のバスバー52Aは、コイル43に対して電気的に接続される。これらにより、端子7Aから、第1のバスバー51Aに電気的に接続されたコイル43に電流が流され、かつ、第2のバスバー52Aに電気的に接続されるコイル43に電流が流される。
The terminal 7A is inserted into the hole 61c of the first holder 61A and into the hole 62c of the second holder 62A. Furthermore, the terminal 7A inserted into the hole 51c of the first bus bar 51A is electrically connected to the first bus bar 51A. Furthermore, the terminal 7A is inserted into the hole 51c of the first bus bar 51A. Therefore, the first bus bar 51A is electrically connected to the terminal 7A. Furthermore, the first bus bar 51A is electrically connected to the coil 43, and the second bus bar 52A is electrically connected to the coil 43. As a result, a current flows from the terminal 7A to the coil 43 electrically connected to the first bus bar 51A, and a current flows to the coil 43 electrically connected to the second bus bar 52A.
カバー8は、例えば、絶縁性の樹脂によって、第1のバスバー51を軸方向Aの一方側から覆うように環状に形成される。カバー8は、本体81aと、本体81aに形成された不図示の孔部と、を有する。孔部は、本体81aを軸方向Aに貫通する形状を備えている。孔部には、第1のホルダ61Aの第1突出部61d、または、端子7Aが挿通される。
The cover 8 is formed, for example, from an insulating resin in a ring shape so as to cover the first bus bar 51 from one side in the axial direction A. The cover 8 has a main body 81a and a hole portion (not shown) formed in the main body 81a. The hole portion has a shape that penetrates the main body 81a in the axial direction A. The first protrusion portion 61d of the first holder 61A or the terminal 7A is inserted into the hole portion.
複数の端子7Aは、径方向Rにおいて、バスバー5Aの接続部51b、521b、522bから外れた位置にそれぞれ配置してある。そのため、端子7Aと、外部装置の端子とを電気的に接続する際、作業者の指が接続部51b、521b、522bに接触することを抑制することができるから、作業性を向上することができる。その上、本実施形態に係るモータ1Aは、複数の端子7Aを周方向Cに沿って配置してあるため、複数の端子7Aのうち1個の端子を外部装置に対して電気的に接続する際、残りの端子7Aが作業者の指に接触することを抑制することができ、作業性を向上することができる。
The multiple terminals 7A are each arranged in a position away from the connection parts 51b, 521b, 522b of the busbar 5A in the radial direction R. Therefore, when electrically connecting the terminals 7A to the terminals of the external device, the operator's fingers can be prevented from coming into contact with the connection parts 51b, 521b, 522b, improving workability. Furthermore, in the motor 1A according to this embodiment, the multiple terminals 7A are arranged along the circumferential direction C, so that when electrically connecting one of the multiple terminals 7A to an external device, the remaining terminals 7A can be prevented from coming into contact with the operator's fingers, improving workability.
なお、上述した実施形態にかかるモータ1Aでは、他方の第2のバスバー522の孔部522dに、第1のホルダ61Aの第2突出部61fが挿通されるものを説明した。しかし、本実施形態に係るモータ1Aは、第1実施形態に係るモータ1と同様、他方の第2のバスバー52Aに係合部を設け、第2のホルダ62Aに、当該係合部に係合可能な突出部を設けてもよい。
In the motor 1A according to the embodiment described above, the second protrusion 61f of the first holder 61A is inserted into the hole 522d of the other second bus bar 522. However, the motor 1A according to this embodiment may be provided with an engagement portion on the other second bus bar 52A, and the second holder 62A may be provided with a protrusion that can engage with the engagement portion, just like the motor 1 according to the first embodiment.
また、上述した第1実施形態に係るモータ1、および、第2実施形態に係るモータ1Aは、インナーロータ型のものを説明した。しかし、本実施形態に係るモータ1、1Aは、それに限られない。例えば、本実施形態に係るモータ1、1Aは、軸方向Aから視た場合、ロータ3の径方向Rの内側にステータ4が位置するアウターロータ側のものに適用することができる。
The motor 1 according to the first embodiment and the motor 1A according to the second embodiment have been described as being of the inner rotor type. However, the motors 1 and 1A according to this embodiment are not limited to this. For example, the motors 1 and 1A according to this embodiment can be applied to an outer rotor side in which the stator 4 is located inside the rotor 3 in the radial direction R when viewed from the axial direction A.
以上、本発明に係るモータ1、1Aの実施形態に基づいて説明したが、本発明は実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲での種々の変更が可能であることも言うまでもない。上述した各実施形態の構成要素を適宜組み合わせて構成したものも本発明に含まれる。そのような要旨を逸脱しない範囲での種々の変更を行ったものも本発明の技術的範囲に含まれるものであり、そのことは、当業者にとって特許請求の範囲の記載から明らかである。
The above has been an explanation based on the embodiments of the motors 1 and 1A according to the present invention, but it goes without saying that the present invention is not limited to the embodiments, and various modifications are possible without departing from the gist of the present invention. The present invention also includes configurations that combine the components of the above-mentioned embodiments as appropriate. Such modifications that do not depart from the gist of the present invention are also included in the technical scope of the present invention, and this will be clear to those skilled in the art from the description of the claims.
1、1A モータ、 2 シャフト、 3 ロータ、 4 ステータ、 4o 外周部、 43 コイル、 5、5A バスバー、 52、52A 第2のバスバー(バスバー)、 521bf 接続面、 522bf 接続面、 522c 係合部、 6、6A ホルダ、 62、62A 第2のホルダ(ホルダ)、 62d 突出部、 62i 内周縁、 62o 外周縁、 7、7A 端子、 A 軸方向、 C 周方向、 R 径方向
1, 1A motor, 2 shaft, 3 rotor, 4 stator, 4o outer periphery, 43 coil, 5, 5A busbar, 52, 52A second busbar (busbar), 521bf connection surface, 522bf connection surface, 522c engagement portion, 6, 6A holder, 62, 62A second holder (holder), 62d protrusion, 62i inner periphery, 62o outer periphery, 7, 7A terminal, A axial direction, C circumferential direction, R radial direction
Claims (4)
- 複数のコイルを有するステータと、
複数のバスバーと、
前記複数のバスバーを保持するホルダと、
を備え、
前記ホルダは、軸方向に延在する突出部が設けられており、
周方向において、前記バスバーの端部と前記突出部とが係合している、
モータ。 A stator having a plurality of coils;
A plurality of bus bars;
a holder for holding the bus bars;
Equipped with
The holder is provided with a protrusion extending in an axial direction,
an end of the bus bar and the protruding portion are engaged with each other in a circumferential direction;
motor. - 外部装置と電気的に接続する複数の端子を備え、
前記ホルダは、径方向において、内周縁と、外周縁とを有し、
前記複数の端子は、前記内周縁と前記外周縁との間に配置されている、
請求項1に記載のモータ。 A plurality of terminals for electrically connecting to an external device are provided,
The holder has an inner peripheral edge and an outer peripheral edge in a radial direction,
The plurality of terminals are disposed between the inner peripheral edge and the outer peripheral edge.
2. The motor according to claim 1. - 前記複数のバスバーは、前記ステータの外周部に隣接して配置された複数の接続面を備え、
前記複数のコイルは、前記複数の接続面に接続される、
請求項2に記載のモータ。 the bus bars each include a plurality of connection surfaces disposed adjacent an outer periphery of the stator;
The coils are connected to the connection surfaces.
The motor according to claim 2. - 前記端子は、前記周方向において前記複数の接続面から外れた位置に配置される、
請求項3に記載のモータ。 The terminal is disposed at a position offset from the plurality of connection surfaces in the circumferential direction.
The motor according to claim 3.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2022-195547 | 2022-12-07 | ||
JP2022195547A JP2024081941A (en) | 2022-12-07 | 2022-12-07 | motor |
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WO2024122141A1 true WO2024122141A1 (en) | 2024-06-13 |
Family
ID=91378690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2023/032802 WO2024122141A1 (en) | 2022-12-07 | 2023-09-08 | Motor |
Country Status (3)
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JP (1) | JP2024081941A (en) |
TW (1) | TW202425490A (en) |
WO (1) | WO2024122141A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012143019A (en) * | 2010-12-28 | 2012-07-26 | Toyota Motor Corp | Bus bar module of rotary electric machine and manufacturing method of the same |
WO2018029894A1 (en) * | 2016-08-12 | 2018-02-15 | 日本電産株式会社 | Motor and electric power steering device |
JP2019097261A (en) * | 2017-11-20 | 2019-06-20 | 株式会社ミツバ | Brushless motor |
JP2020099144A (en) * | 2018-12-18 | 2020-06-25 | Kyb株式会社 | Rotary electric machine |
-
2022
- 2022-12-07 JP JP2022195547A patent/JP2024081941A/en active Pending
-
2023
- 2023-09-08 WO PCT/JP2023/032802 patent/WO2024122141A1/en unknown
- 2023-12-01 TW TW112146933A patent/TW202425490A/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012143019A (en) * | 2010-12-28 | 2012-07-26 | Toyota Motor Corp | Bus bar module of rotary electric machine and manufacturing method of the same |
WO2018029894A1 (en) * | 2016-08-12 | 2018-02-15 | 日本電産株式会社 | Motor and electric power steering device |
JP2019097261A (en) * | 2017-11-20 | 2019-06-20 | 株式会社ミツバ | Brushless motor |
JP2020099144A (en) * | 2018-12-18 | 2020-06-25 | Kyb株式会社 | Rotary electric machine |
Also Published As
Publication number | Publication date |
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TW202425490A (en) | 2024-06-16 |
JP2024081941A (en) | 2024-06-19 |
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