CN111817505A - Motor with a stator having a stator core - Google Patents
Motor with a stator having a stator core Download PDFInfo
- Publication number
- CN111817505A CN111817505A CN202010064891.2A CN202010064891A CN111817505A CN 111817505 A CN111817505 A CN 111817505A CN 202010064891 A CN202010064891 A CN 202010064891A CN 111817505 A CN111817505 A CN 111817505A
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- China
- Prior art keywords
- substrate
- circuit board
- axial direction
- stator
- axial
- Prior art date
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 143
- 239000000758 substrate Substances 0.000 claims abstract description 117
- 239000012212 insulator Substances 0.000 claims abstract description 50
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Providing a motor, the stator having: a stator core having a core outer circumferential surface that surrounds the central axis and expands in a circumferential direction; and an insulating member fixed to the stator core. The insulator has a cylindrical portion extending to one axial side than the stator core and surrounding the central axis. An end surface of the cylindrical portion on one axial side is polygonal when viewed from the axial direction. The pair of plate surfaces of the circuit board face to the axial direction, and the circuit board is contacted with the end surface from one axial side. The circuit board has a substrate outer peripheral edge having a polygonal shape when viewed from the axial direction. The circuit board has a plurality of substrate corner portions arranged in a circumferential direction on an outer peripheral portion of the circuit board. The second housing portion has a substrate pressing portion that contacts the circuit board from one axial side. The substrate pressing portion overlaps with the substrate corner portion when viewed from the axial direction.
Description
Technical Field
The present invention relates to a motor.
Background
The motor includes a rotor, a stator, a circuit board, and a motor case. The circuit board of patent document 1 is fixed by screw fastening.
Patent document 1: japanese patent laid-open publication No. 2013-150520
When the circuit board is fixed by screws, the screws or the like penetrate through the circuit board at a position inside the outer edge portion of the circuit board. This causes a space around the screw where wiring cannot be performed, and thus the degree of freedom of the wiring pattern may be low.
Disclosure of Invention
In view of the above circumstances, an object of the present invention is to provide a motor capable of improving the degree of freedom of a wiring pattern of a circuit board and stably fixing a substrate.
One embodiment of the motor of the present invention includes: a rotor supported to be rotatable about a central axis; a stator surrounding the rotor from a radially outer side; a circuit board electrically connected to the stator; and a motor housing that houses the rotor, the stator, and the circuit board. The motor housing has: a first case portion having a bottomed cylindrical shape, which houses at least the rotor and the stator; and a second case portion having a top cylindrical shape, which is connected to the first case portion, and an opening of which is opposed to the opening of the first case portion. The stator has: a stator core having a core outer circumferential surface that surrounds the central axis and expands in a circumferential direction; and an insulating member fixed to the stator core. The insulator has a cylindrical portion extending to one axial side than the stator core and surrounding the central axis. An end surface of the cylindrical portion on one axial side is polygonal when viewed from the axial direction. The pair of plate surfaces of the circuit board face to the axial direction, and the circuit board is contacted with the end surface from one axial side. The circuit board has a substrate outer peripheral edge having a polygonal shape when viewed from the axial direction. The circuit board has a plurality of substrate corner portions arranged in a circumferential direction on an outer peripheral portion of the circuit board. The second housing portion has a substrate pressing portion that contacts the circuit board from one axial side. The substrate pressing portion overlaps with the substrate corner portion when viewed from the axial direction.
According to the motor of one embodiment of the present invention, the degree of freedom of the wiring pattern of the circuit board can be increased, and the substrate can be stably fixed.
Drawings
Fig. 1 is a perspective view showing a motor of the present embodiment.
Fig. 2 is a longitudinal sectional view showing the motor of the present embodiment.
Fig. 3 is a cross-sectional view showing the III-III section of fig. 2, in which illustration of the coil is omitted.
Fig. 4 is a cross-sectional view showing the section IV-IV of fig. 2, in which illustration of the circuit board and the coil is omitted.
Fig. 5 is a cross-sectional view showing the V-V section of fig. 2.
Description of the reference symbols
1: a motor; 2: a rotor; 3: a stator; 5: a circuit board; 5a, 5 b: plate surface; 5 c: a shaft hole; 5 d: a first substrate corner; 5 e: a second substrate corner; 5 f: a substrate recess; 5 g: a pin receiving portion; 10: a motor housing; 11: a first housing portion; 11 a: a peripheral wall portion; 11 c: a housing plane portion; 11 d: an iron core support part; 11 e: a first rotation stop portion; 11 f: a second rotation stop portion; 12: a second housing portion; 12 d: a substrate pressing portion; 31: a stator core; 31 c: the peripheral surface of the iron core; 31 d: a first groove portion; 32: an insulating member; 33: a coil; 34: a barrel portion; 34 a: an end face; 34 b: an insulator planar portion; 35: a second groove portion; 36. 36 a: a pin; 360: wide width portion 40: a heating section; j: a central axis.
Detailed Description
A motor 1 according to an embodiment of the present invention will be described with reference to the drawings. The motor 1 of the present embodiment is a motor that drives a fan of a refrigerator, a freezer, or the like, for example. The motor 1 is, for example, an 8-pole, 8-slot single-phase motor. The motor 1 has a central axis J. In each figure, the central axis J extends in the Z-axis direction. The Z-axis direction is, for example, a vertical direction when the motor 1 is assembled, but when the motor 1 is installed in an apparatus and used, the Z-axis direction may be a vertical direction, a horizontal direction, or any other direction.
In the following description, unless otherwise specified, a direction parallel to the central axis J will be simply referred to as "axial direction". The radial direction centered on the center axis J is simply referred to as "radial direction". In the radial direction, a direction approaching the central axis J is referred to as a radially inner side, and a direction away from the central axis J is referred to as a radially outer side. The circumferential direction around the central axis J, i.e., the direction around the central axis J is simply referred to as "circumferential direction". In the present embodiment, the "parallel direction" includes a substantially parallel direction, and the "perpendicular direction" includes a substantially perpendicular direction.
As shown in fig. 1 to 5, the motor 1 includes a rotor 2 supported to be rotatable about a central axis J, a plurality of bearings 24 and 25, a stator 3, a circuit board 5, a motor case 10, a plurality of fastening screws 7, and a wiring member 9. The axial position of the stator 3 and the axial position of the circuit board 5 are different from each other. In the present embodiment, a direction from the stator 3 toward the circuit board 5 in the axial direction is referred to as one axial side (+ Z side), and a direction from the circuit board 5 toward the stator 3 is referred to as the other axial side (-Z side).
The rotor 2 includes a shaft 21, a rotor core 22, and a magnet (not shown). The shaft 21 is centered on the central axis J and extends in the axial direction. The shaft 21 is supported rotatably about the center axis J by a plurality of bearings 24 and 25 provided in the motor case 10. In the present embodiment, a pair of bearings 24 and 25 are provided so as to be axially spaced from each other. The bearings 24 and 25 are, for example, ball bearings.
The rotor core 22 is annular with the center axis J as the center. In the present embodiment, rotor core 22 has a cylindrical shape. Rotor core 22 is disposed radially outward of shaft 21. The inner peripheral surface of rotor core 22 is fixed to the outer peripheral surface of shaft 21. Rotor core 22 rotates about central axis J together with shaft 21. Although not shown, the magnets are disposed on the outer peripheral surface of rotor core 22. The magnets are arranged in a plurality of circumferential directions. The magnet may be a cylindrical ring magnet centered on the central axis J.
The stator 3 surrounds the rotor 2 from the radially outer side. The stator 3 surrounds the rotor core 22 over the entire circumferential range from the radially outer side in the circumferential direction. The stator 3 is opposed to the magnet of the rotor 2 with a gap in the radial direction. I.e. the stator 3 is diametrically opposite the rotor 2. The stator 3 has a stator core 31, an insulator 32, and a plurality of coils 33.
The stator core 31 is annular with the center axis J as the center. The stator core 31 is disposed radially outward of the rotor 2. The stator core 31 surrounds the rotor 2 from the radially outer side. The stator core 31 is, for example, a steel plate laminate body formed by laminating a plurality of electromagnetic steel plates in the axial direction.
The first groove 31d is recessed radially inward from the core outer circumferential surface 31c and extends in the axial direction. The first groove 31d extends over the entire length of the core outer circumferential surface 31c in the axial direction. The first groove portion 31d is arranged to overlap the tooth 31b when viewed in the radial direction. In the present embodiment, a plurality of first groove portions 31d are arranged at intervals in the circumferential direction on the core outer circumferential surface 31 c. However, the number of the first grooves 31d is not limited to this, and only one first groove may be provided in the core outer circumferential surface 31 c.
The teeth 31b extend radially inward from the inner circumferential surface of the core back 31 a. The plurality of teeth 31b are arranged on the inner circumferential surface of the core back 31a at intervals in the circumferential direction. The teeth 31b are radially opposed to the rotor 2. The radially inner surfaces of the teeth 31b face the magnets of the rotor 2 at intervals from the radially outer side.
The insulator 32 is attached to the stator core 31. The insulator 32 is attached to the stator core 31 so as not to move at least in the circumferential direction and the radial direction. The insulator 32 is fixed to the stator core 31. The material of the insulating member 32 is, for example, an insulating material such as resin. The insulator 32 has a portion covering the plurality of teeth 31b and a cylindrical portion 34.
The cylindrical portion 34 is a portion of the insulator 32 located on the axially one side and radially outward. The cylindrical portion 34 extends to one axial side than the stator core 31. The barrel portion 34 surrounds the central axis J. The cylindrical portion 34 is cylindrical about the central axis J. The cylindrical portion 34 is a polygonal cylinder extending in the axial direction. The tube portion 34 has a polygonal tube shape of a square or more. That is, the outer peripheral surface of the tube portion 34 has four or more sides and four or more corners in the cross-sectional view. In the present embodiment, the cylindrical portion 34 has an octagonal cylindrical shape. In the cross-sectional view, the outer peripheral surface of the barrel portion 34 has eight sides and eight corners.
In the cross-sectional view, the outer peripheral surface of the cylindrical portion 34 has a polygonal shape. In the cross-sectional view, the shape of the outer peripheral surface of the tube portion 34 is any one of a hexagonal shape, an octagonal shape, a nonagonal shape, a decagonal shape, and a dodecagonal shape. In the present embodiment, the outer peripheral surface of the tube portion 34 is octagonal in a cross-sectional view. Specifically, in the cross-sectional view, the outer peripheral surface of the tube portion 34 has a regular octagonal shape. The axial end surface 34a of the cylindrical portion 34 has a polygonal shape when viewed in the axial direction. The end surface 34a is located at an end portion on one side in the axial direction. In the present embodiment, the end surface 34a has an octagonal shape, specifically, a regular octagonal shape, when viewed from the axial direction.
The tube portion 34 includes a plurality of insulator flat surface portions 34b, a second groove portion 35, and a pin 36. The plurality of insulator flat surface portions 34b are arranged in the circumferential direction on the outer peripheral surface of the tube portion 34. The insulator flat surface portions 34b constitute a part of the outer peripheral surface of the tube portion 34 in the circumferential direction. The insulator flat surface portion 34b faces radially outward. The insulator flat surface portion 34b is a flat surface extending in a direction perpendicular to the radial direction. The insulator flat surface portion 34b has a quadrangular shape when viewed from the radial direction. The insulator flat surface portion 34b has a rectangular shape having a length in the circumferential direction larger than that in the axial direction when viewed in the radial direction.
The number of insulator flat portions 34b is equal to the number of coils 33. That is, the number of coils 33 and the number of insulator flat portions 34b are the same as each other. In the present embodiment, the motor 1 has 8-pole 8 slots, that is, eight coils 33, eight cylindrical portions 34 having an octagonal cylindrical shape, an outer peripheral surface of the cylindrical portion 34 having an octagonal shape in a cross-sectional view, and eight insulator flat surface portions 34b arranged in a circumferential direction on the outer peripheral surface of the cylindrical portion 34. In the present embodiment, the number of polygonal sides on the outer peripheral surface of the cylindrical portion 34 is determined according to the number of coils 33 (the number of slots).
According to the present embodiment, the outer peripheral surface of the cylindrical portion 34 can be formed into a polygonal shape having the same number of sides as the number of the coils 33 (the number of slots) in a cross-sectional view. The coils 33 and the insulator flat surface portions 34b can be arranged one for one. Therefore, the structure of the tube portion 34 can be simplified, and the tube portion 34 can be easily manufactured.
The second groove portion 35 is recessed radially inward from the insulator flat surface portion 34b and extends in the axial direction. The second groove portion 35 extends over the entire length of the insulator planar portion 34b in the axial direction. The other axial end of the second groove portion 35 is connected to the one axial end of the first groove portion 31 d. That is, the second groove portion 35 is axially connected to the first groove portion 31 d. In the present embodiment, the second groove portion 35 is provided only in one insulator plane portion 34b among the plurality of insulator plane portions 34 b. That is, one second groove portion 35 is provided on the outer peripheral surface of the cylindrical portion 34. The second groove portion 35 is disposed in the circumferential center portion of the insulator planar portion 34 b.
The pin 36 protrudes from an end surface 34a of the cylindrical portion 34 facing one axial side toward one axial side. The pin 36 is substantially cylindrical extending in the axial direction. The length of the pin 36 in the axial direction is greater than the length of the circuit board 5 in the axial direction, that is, greater than the length (thickness) between a pair of plate surfaces of the circuit board 5. The tip of the pin 36 protrudes to one side in the axial direction from the plate surface of the circuit board 5 facing the one side in the axial direction.
The pin 36 is disposed at least one of the corners of the end surface 34 a. In the present embodiment, a plurality of pins 36 are provided. The plurality of pins 36 are disposed at least two of the plurality of corners of the end surface 34a, respectively. In the present embodiment, the end surface 34a has an octagonal shape when viewed from the axial direction, and has eight corner portions. The pins 36 are arranged at half (four) of the total number (eight) of the corners. One pin 36 is disposed at each of the four corners. In the end surface 34a, the corners where the pins 36 are arranged and the corners where the pins 36 are not arranged are alternately arranged in the circumferential direction.
The coil 33 is attached to the teeth 31b via a portion of the insulator 32 that covers the teeth 31 b. The plurality of coils 33 are formed by winding a conductive wire around each of the teeth 31b via the insulator 32. That is, the plurality of coils 33 are attached to the stator core 31 via the insulator 32.
The number of coils 33 is 6 or more, and specifically, may be any of 6, 8, 9, 10, and 12. In the present embodiment, the number of coils 33 is 8. As in the present embodiment, when the motor 1 is a single-phase motor and the number of coils 33 is 6 (6 slots) or more, the cogging can be reduced as compared with the case of a single-phase motor and 4 slots in general, for example. Here, as described above, the number of coils 33 and the number of insulator flat portions 34b are equal to each other. In the present embodiment, the larger the number of coils 33, that is, the larger the number of insulator flat portions 34b, the more the cogging can be reduced. In addition, when the number of coils 33 is a multiple of 3 of 6 (6 slots), 9 (9 slots), and 12 (12 slots), the motor 1 can be easily applied to a three-phase motor.
The circuit board 5 is electrically connected to the stator 3. The circuit board 5 is electrically connected to an external power supply not shown via a wiring member 9. The circuit board 5 supplies power supplied from an external power source to the coil 33 of the stator 3. The circuit board 5 controls the current supplied to the coil 33.
The circuit board 5 has a pair of plate-like surfaces facing in the axial direction. The circuit board 5 is annular with the center axis J as the center. The circuit board 5 is disposed on one axial side of the cylindrical portion 34. The circuit board 5 contacts the end surface 34a of the cylindrical portion 34 facing the axial direction from the axial direction side.
In the circuit board 5, the outer peripheral surface of the circuit board 5 is polygonal when viewed from the axial direction. The outer peripheral surface of the substrate of the circuit board 5 has a polygonal shape of a quadrangle or more when viewed from the axial direction. That is, the substrate outer peripheral surface of the circuit board 5 has four or more sides and four or more corners when viewed from the axial direction. The outer peripheral surface of the substrate has any one of a hexagonal shape, an octagonal shape, a nonagonal shape, a decagonal shape, and a dodecagonal shape when viewed from the axial direction. In the present embodiment, the outer peripheral surface of the substrate has an octagonal shape when viewed from the axial direction. The substrate outer peripheral surface has eight sides and eight corners when viewed from the axial direction. Specifically, in the present embodiment, the outer peripheral surface of the substrate has a regular octagonal shape when viewed from the axial direction.
The substrate outer peripheral surface of the circuit board 5 and the outer peripheral surface of the tube portion 34 overlap over substantially the entire circumference around the center axis J when viewed from the axial direction. The shape of the outer peripheral surface of the substrate of the circuit board 5 substantially matches the shape of the outer peripheral surface of the tube portion 34 when viewed from the axial direction. When viewed from the axial direction, the plurality of (eight) side portions of the outer peripheral surface of the substrate and the plurality of (eight) insulator flat surface portions 34b of the cylindrical portion 34 overlap each other. In particular, although not shown, the diameter of the circumscribed circle of the substrate outer peripheral surface of the circuit board 5 is larger than the outer diameter of the stator core 31 when viewed from the axial direction. That is, when viewed from the axial direction, the diameter of a circumscribed circle passing through a plurality of corners of the outer peripheral surface of the base plate and centered on the central axis J is larger than the outer diameter of the outer peripheral surface 31c of the core. When viewed from the axial direction, the inscribed circle of the substrate outer peripheral surface of the circuit board 5 overlaps the core outer peripheral surface 31 c. That is, an inscribed circle that is in contact with the sides of the outer peripheral surface of the base plate and centered on the central axis J substantially coincides with the core outer peripheral surface 31c when viewed from the axial direction. According to the present embodiment, the area of the board surface of the circuit board 5 can be ensured to be large. This improves the degree of freedom of the wiring pattern of the circuit board 5, suppresses temperature rise of the circuit board 5, and suppresses noise.
The circuit board 5 has a shaft hole 5c, a plurality of board corners, and a board recess 5 f. The shaft hole 5c is disposed in the center of the circuit board 5 when viewed from the axial direction. The shaft hole 5c penetrates the circuit board 5 in the axial direction. In the present embodiment, the shaft hole 5c has a circular hole shape. The shaft 21 is axially inserted into the shaft hole 5 c.
The plurality of substrate corner portions are arranged in the circumferential direction on the outer peripheral portion of the circuit board 5. The plurality of substrate corners have a first substrate corner 5d and a second substrate corner 5 e. The first base plate corner 5d is axially opposed to a corner where the pin 36 is arranged, among a plurality of corners of the end surface 34a of the tube 34 facing one axial side.
The first substrate corner 5d has a pin receiving portion 5 g. The pin 36 is inserted into the pin receiving portion 5 g. The pin receiving portion 5g is any one of a groove recessed radially inward from the outer peripheral surface of the circuit board 5 and extending in the axial direction and a hole penetrating the circuit board 5 in the axial direction, and is a groove in the present embodiment. The first substrate corner portion 5d is provided in plural, and the pin accommodating portion 5g is also provided in plural. In the present embodiment, four first substrate corner portions 5d are provided at equal intervals in the circumferential direction, and four pin receiving portions 5g are also provided at equal intervals in the circumferential direction.
The pin 36 is columnar and protrudes from an end surface 34a of the cylindrical portion 34 facing one axial side toward one axial side. The pin 36 shown in the present embodiment is substantially cylindrical and extends in the axial direction. The pin 36 may also be generally prismatic in shape extending in the axial direction. The length of the pin 36 in the axial direction is greater than the length of the circuit board 5 in the axial direction, that is, greater than the length (thickness) between a pair of plate surfaces of the circuit board 5. The tip of the pin 36 protrudes to one side in the axial direction from the plate surface of the circuit board 5 facing the one side in the axial direction.
The pin 36 is disposed at least one of the corners of the end surface 34 a. In the present embodiment, a plurality of pins 36 are provided. The plurality of pins 36 are disposed at least two of the plurality of corners of the end surface 34a, respectively. In the present embodiment, the end surface 34a has an octagonal shape when viewed from the axial direction, and has eight corner portions. The pins 36 are arranged at half (four) of the total number (eight) of the corners. One pin 36 is disposed at each of the four corners. In the end surface 34a, the corners where the pins 36 are arranged and the corners where the pins 36 are not arranged are alternately arranged in the circumferential direction.
According to the present embodiment, the insulator 32 and the circuit board 5 can be easily aligned in the radial direction and the circumferential direction by inserting the pin 36 into the pin receiving portion 5 g. Further, the pin 36 and the set of the pin receiving portions 5g into which the pin 36 is inserted are provided in plural, whereby the relative movement of the insulator 32 and the circuit board 5 in all directions along an imaginary plane perpendicular to the center axis J can be suppressed.
The second substrate corner 5e is axially opposed to a corner where the pin 36 is not arranged among a plurality of corners of the end surface 34a of the tube 34 facing the one axial side. The second substrate corner portion 5e is provided in plural. In the present embodiment, four second substrate corner portions 5e are provided at equal intervals in the circumferential direction. In the outer peripheral portion of the circuit board 5, the first substrate corner portions 5d and the second substrate corner portions 5e are alternately arranged in the circumferential direction. According to the present embodiment, the circuit board 5 can be more stably aligned with respect to the insulator 32. Further, the circuit board 5 can be more stably fixed to the tube portion 34.
The substrate concave portion 5f is recessed radially inward from the substrate outer peripheral surface of the circuit board 5. The substrate recess 5f extends in the axial direction on the substrate outer peripheral surface of the circuit board 5. The substrate recess 5f is groove-shaped and extends over the entire length (entire thickness) of the substrate outer peripheral surface in the axial direction. Only one substrate concave portion 5f is provided on the substrate outer peripheral surface. The substrate recess 5f is disposed on one of the eight sides of the substrate outer peripheral surface. The substrate recess 5f is disposed in the circumferential center portion of the side portion of the substrate outer peripheral surface.
As shown in fig. 1 and 2, the motor case 10 houses the rotor 2, the stator 3, and the circuit board 5. Further, the motor housing 10 accommodates the plurality of bearings 24 and 25 and a part of the wiring member 9. The motor housing 10 includes a first housing portion 11, a second housing portion 12, and a wiring holding member 16. At least the first housing portion 11 of the components constituting the motor housing 10 is made of resin. In the present embodiment, the second case portion 12 is also made of resin.
As shown in fig. 3, at least the rotor 2 and the stator 3 are disposed in the first housing portion 11. Further, the first housing portion 11 is provided with the circuit board 5, the bearing 24, and a part of the wiring holding member 16. The first housing portion 11 has a bottomed cylindrical shape. The first housing portion 11 is open to one axial side. The first housing portion 11 has a peripheral wall portion 11a and a bottom wall portion 11 b. In addition, the peripheral wall portion 11a may be referred to as a first peripheral wall portion 11a instead. The first housing portion 11 further includes a plurality of housing plane portions 11c, a core abutting portion 11k, a core support portion 11d, a first rotation stop portion 11e, a second rotation stop portion 11f, an annular groove portion 11g, a first ear portion 11i, a nut portion 11j, a first holder support tube 11h, and a shaft passage hole 11 m.
The peripheral wall 11a is cylindrical and extends in the axial direction. In the present embodiment, the peripheral wall portion 11a has a tapered tubular shape with a diameter that increases toward one axial side. The peripheral wall portion 11a has a conical cylindrical portion and a polygonal cylindrical portion. The conical cylindrical portion is located at the other axial end of the peripheral wall portion 11 a. The conical cylindrical portion is connected to the bottom wall portion 11 b. The polygonal tubular portion is located in the peripheral wall portion 11a except for the other axial end portion. The polygonal tubular portion of the peripheral wall portion 11a is a polygonal tubular shape of a quadrangle or more. In the present embodiment, the polygonal tubular portion has an octagonal tubular shape.
In a cross-sectional view, the outer peripheral surface of the peripheral wall portion 11a of the first housing portion 11 is polygonal. Specifically, the outer peripheral surface of the polygonal tubular portion of the peripheral wall portion 11a is polygonal in the cross-sectional view, and is octagonal in the present embodiment. According to the present embodiment, the design of the appearance of the first housing portion 11 can be improved.
The inner peripheral surface of the peripheral wall portion 11a of the first housing portion 11 is polygonal in a cross-sectional view. Specifically, the inner peripheral surface of the polygonal tubular portion of the peripheral wall portion 11a is polygonal in the cross-sectional view, and is octagonal in the present embodiment. In the cross-sectional view, the outer peripheral surface and the inner peripheral surface of the peripheral wall portion 11a are similar in shape to each other. According to the present embodiment, the thickness of the peripheral wall portion 11a of the first housing portion 11 can be made constant in the circumferential direction, and the rigidity of the peripheral wall portion 11a can be ensured over the entire circumferential range.
The plurality of housing flat surface portions 11c are arranged in the circumferential direction on the inner circumferential surface of the circumferential wall portion 11 a. Each of the housing plane portions 11c forms a part of the inner peripheral surface of the peripheral wall portion 11a in the circumferential direction. The housing flat surface portion 11c is disposed on the inner peripheral surface of the polygonal tubular portion of the peripheral wall portion 11 a. The housing plane portion 11c faces radially inward. The housing flat surface portion 11c is a flat surface extending in a direction perpendicular to the radial direction (substantially perpendicular direction). In the cross-sectional view, the housing plane portion 11c extends in a direction perpendicular to the radial direction.
In the present embodiment, the polygonal tubular portion of the peripheral wall portion 11a has an octagonal tubular shape, and the number of the housing plane portions 11c is eight. That is, the number of case plane portions 11c and the number of insulator plane portions 34b are the same as each other. Also, the number of case plane portions 11c and the number of coils 33 are also the same as each other. The housing flat surface portion 11c is opposed to the stator core 31 and the cylindrical portion 34 in the radial direction. Specifically, the case planar portion 11c and the core outer peripheral surface 31c are opposed to each other with a gap in the radial direction. The case plane portion 11c and the insulator plane portion 34b are opposed to each other with a gap therebetween in the radial direction. The case planar portion 11c and the insulator planar portion 34b are arranged parallel to each other when viewed from the axial direction.
The core abutting portion 11k protrudes radially inward from the inner peripheral surface of the peripheral wall portion 11a, and contacts the stator core 31 from the other axial side. The core abutting portion 11k is rib-shaped extending in the axial direction. With respect to the core abutting portion 11k, an end surface of the core abutting portion 11k facing one axial side is in contact with a surface of the core back portion 31a facing the other axial side. The core abutment portions 11k are arranged at three or more intervals in the circumferential direction on the inner circumferential surface of the circumferential wall portion 11 a. In the present embodiment, four core abutting portions 11k are provided at equal intervals from each other in the circumferential direction. The core abutting portion 11k is disposed on the case plane portion 11 c. The core abutment portion 11k is located at a circumferential center portion in the case planar portion 11 c. According to the present embodiment, three or more core abutting portions 11k are in contact with the core back portion 31a of the stator core 31 in the axial direction, whereby the position of the stator 3 in the axial direction with respect to the first housing portion 11 is stably determined.
As shown in fig. 3, the core support portion 11d protrudes radially inward from the inner peripheral surface of the peripheral wall portion 11a and contacts the core outer peripheral surface 31 c. That is, the radially inner surface of the core support 11d contacts the core outer circumferential surface 31 c. The core support 11d has a rib shape extending in the axial direction. The height of the core support portion 11d protruding radially inward from the inner peripheral surface of the peripheral wall portion 11a is smaller than the height of the core abutment portion 11k protruding radially inward from the inner peripheral surface of the peripheral wall portion 11 a. The height of the core support portion 11d protruding radially inward from the inner peripheral surface of the peripheral wall portion 11a increases toward one axial side. Thereby, the core support portion 11d is in contact with the core outer peripheral surface 31c over the entire length of the core outer peripheral surface 31c in the axial direction.
The core support portions 11d are arranged at three or more intervals in the circumferential direction on the inner circumferential surface of the circumferential wall portion 11 a. In the present embodiment, four core support portions 11d are provided at equal intervals in the circumferential direction. The number of the core support portions 11d and the number of the core abutting portions 11k are the same as each other. The core support portion 11d is disposed on the case plane portion 11 c. The core support portion 11d is located at the circumferential center portion of the case planar portion 11 c. The circumferential position of the core support portion 11d and the circumferential position of the core abutting portion 11k are the same as each other. The core support portion 11d and the core abutting portion 11k are connected to each other in the axial direction.
The first rotation preventing portion 11e protrudes radially inward from the inner peripheral surface of the peripheral wall portion 11a, and is disposed in contact with the insulator flat surface portion 34b or in contact with the insulator flat surface portion 34 b. That is, the radially inner side surface of the first rotation stopper portion 11e is opposed to the insulator flat surface portion 34b in a contact or contactable manner. The first rotation stopper 11e is radially opposed to the substrate outer peripheral surface of the circuit board 5. The first rotation stopper 11e is opposed to a flat surface portion of the outer peripheral surface of the substrate, i.e., a side portion of the outer peripheral surface of the substrate with a gap in the radial direction when viewed in the axial direction. The first rotation stopper 11e is rib-shaped and extends in the axial direction. The radial position of the radially inner surface of the first detent portion 11e and the radial position of the radially inner surface of the core support portion 11d are the same. That is, with respect to the radial position, the radially inner side surface of the first rotation stopper portion 11e and the radially inner side surface of the core support portion 11d are coplanar with each other.
The first rotation stopper 11e protrudes radially inward from the inner peripheral surface of the peripheral wall 11a to a height slightly greater than the core support 11d protrudes radially inward from the inner peripheral surface of the peripheral wall 11 a. The first rotation stopper 11e protrudes radially inward from the inner peripheral surface of the peripheral wall 11a to a greater height in the axial direction. Thus, the first rotation stopper 11e is disposed so as to be in contact with the insulator plane portion 34b or so as to be able to be in contact with the insulator plane portion 34b over the entire length of the insulator plane portion 34b in the axial direction. At least one first rotation stopper 11e is disposed on the inner peripheral surface of the peripheral wall 11 a.
According to the present embodiment, the three or more core support portions 11d of the first housing portion 11 are brought into contact with the core outer circumferential surface 31c of the stator core 31, whereby the first housing portion 11 and the stator 3 are coaxially aligned. That is, the three or more core support portions 11d support the core outer peripheral surface 31c at a part, i.e., "a point", in the circumferential direction. Thus, the relative radial positions of the first housing part 11 made of resin and the stator 3 are stably determined, and the relative positional accuracy in the radial direction is ensured. Further, the first rotation stop portion 11e contacts the insulator flat surface portion 34b, thereby suppressing relative rotation of the first housing portion 11 and the stator 3 about the center axis J. Therefore, the use of the first housing portion 11 made of resin reduces the manufacturing cost of the motor 1, and at the same time, the motor housing 10 and the stator 3 can be stably aligned, and idling of the motor housing 10 and the stator 3 is suppressed.
Preferably, three or more first rotation stoppers 11e are disposed on the inner circumferential surface of the circumferential wall 11a at intervals in the circumferential direction. In the present embodiment, four first rotation preventing portions 11e are provided at equal intervals in the circumferential direction. The number of the first rotation stop portions 11e and the number of the core support portions 11d are the same as each other. The first rotation stopper 11e is disposed on the housing plane portion 11 c. The first rotation stopper portion 11e is located at a circumferential center portion of the housing flat surface portion 11 c. The circumferential position of the first rotation stop portion 11e and the circumferential position of the core support portion 11d are the same as each other. The first rotation stop portion 11e and the core support portion 11d are connected to each other in the axial direction.
In the present embodiment, the core support portion 11d and the first rotation stop portion 11e are axially connected, and thus the core support portion 11d and the first rotation stop portion 11e constitute one rib extending in the axial direction. For example, according to the present embodiment, the structure of the first housing portion 11 can be simplified as compared with a case where the core support portion 11d and the first rotation stopper portion 11e are provided in the first housing portion 11. Further, in the present embodiment, since the core abutting portion 11k and the core support portion 11d are axially connected, the effect of simplifying the structure of the first housing portion 11 is more significant.
Further, since the first rotation preventing portion 11e is disposed on the housing plane portion 11c, the first rotation preventing portion 11e is more stably in contact with the insulator plane portion 34 b. Specifically, in the present embodiment, the first rotation stop portion 11e is radially opposed to the radially innermost portion of the insulator planar portion 34b in the cross-sectional view. That is, the first rotation stop portion 11e is radially opposed to the circumferential central portion of the insulator planar portion 34b in the cross-sectional view. According to the present embodiment, the allowance of the relative rotation between the first housing portion 11 and the stator 3 is suppressed to be smaller, and the idling of the motor housing 10 and the stator 3 can be further suppressed.
The second rotation stopper 11f protrudes radially inward from the inner peripheral surface of the peripheral wall 11a and extends in the axial direction. The second rotation stopper 11f is rib-shaped and extends in the axial direction. The second rotation stopper 11f is disposed in the polygonal tubular portion of the peripheral wall 11a, and extends over the entire axial length of the polygonal tubular portion. One second rotation stopper 11f is disposed on the inner peripheral surface of the peripheral wall 11 a. The second rotation stopper 11f is disposed on the housing plane 11 c. The second rotation stopper 11f is disposed at a circumferential center portion of the housing flat surface portion 11 c. The second rotation stopper 11f is disposed over the entire axial length of the housing flat surface portion 11 c.
The second rotation stopper 11f is radially opposed to the stator core 31, the cylindrical portion 34, and the circuit board 5. The second rotation stopper 11f is radially opposed to the core outer peripheral surface 31 c. The second rotation stopper 11f is radially opposed to the insulator flat surface portion 34 b. The second rotation stop portion 11f is opposed to a flat surface portion in the substrate outer peripheral surface of the circuit board 5, i.e., a side portion of the substrate outer peripheral surface in the radial direction when viewed from the axial direction.
The second rotation stopper 11f is inserted into the first groove 31 d. According to the present embodiment, the second rotation stopper 11f is inserted into the first groove 31d, and thereby relative rotation between the first housing portion 11 and the stator core 31 about the central axis J is further suppressed. Therefore, the idling of the first housing portion 11 and the stator 3 is further suppressed.
The second rotation stopper 11f is inserted into the second groove 35. According to the present embodiment, the second rotation stopper 11f is inserted into the second groove 35, and thereby relative rotation between the first housing portion 11 and the cylindrical portion 34 about the center axis J is further suppressed. Therefore, the idling of the first housing portion 11 and the stator 3 is further suppressed.
The second rotation stopper 11f is inserted into the substrate recess 5 f. According to the present embodiment, the second rotation stopper 11f is inserted into the substrate recess 5f, so that the first housing portion 11 and the stator 3 can be easily aligned with the circuit board 5 in the circumferential direction.
The annular groove portion 11g is recessed from an end surface of the peripheral wall portion 11a facing one axial side toward the other axial side, and extends in the circumferential direction. The annular groove portion 11g is annular with the center axis J as the center.
The first lug portion 11i protrudes radially outward from an end of the peripheral wall portion 11a facing one axial side. The first ear portions 11i are provided in plurality at intervals from each other in the circumferential direction. The first lug portion 11i has a screw insertion hole penetrating the first lug portion 11i in the axial direction. The nut portion 11j is embedded in a screw insertion hole of the first ear portion 11 i.
The bottom wall 11b has a plate shape with a pair of plate surfaces facing in the axial direction. The outer peripheral portion of the bottom wall portion 11b is connected to the other axial end of the peripheral wall portion 11a, i.e., a conical portion. The first holder support tube 11h is a tube shape extending from the bottom wall portion 11b toward one axial side.
The shaft passage hole 11m axially penetrates the bottom wall 11 b. The shaft 21 passes through the shaft passage hole 11 m. The other axial end of the shaft 21 passes through the shaft passage hole 11m and is exposed to the outside of the motor 1. That is, the shaft 21 has a portion located on the other axial side than the shaft passage hole 11 m. A fan, not shown, is fixed to the other axial end of the shaft 21.
The axial position of the second housing portion 12 and the axial position of the first housing portion 11 are different from each other. Therefore, in the present embodiment, a direction from the first housing portion 11 toward the second housing portion 12 in the axial direction may be referred to as one axial side (+ Z side), and a direction from the second housing portion 12 toward the first housing portion 11 may be referred to as the other axial side (-Z side). The second housing portion 12 faces the first housing portion 11 from one axial side and is connected to the first housing portion 11.
The second housing portion 12 is provided with a bearing 25, a part of the wiring member 9, and a part of the wiring holding member 16. The second housing portion 12 has a top cylindrical shape. The second housing portion 12 is open to the other axial side. The second housing portion 12 has a peripheral wall portion 12a and a top wall portion 12 b. The peripheral wall portion 12a may be referred to as a second peripheral wall portion 12a instead. Further, the second housing portion 12 includes a pressing rib 12c, a substrate pressing portion 12d, an annular rib 12e, a second ear portion 12g, and a second holder support tube 12 f. The opening of the second housing portion 12 is opposed to the opening of the first housing portion 11.
The peripheral wall portion 12a is cylindrical and extends in the axial direction. In the present embodiment, the peripheral wall portion 12a is substantially cylindrical. The peripheral wall portion 12a is slightly larger in diameter toward the other side in the axial direction. The pressing rib 12c protrudes radially inward from the inner peripheral surface of the peripheral wall 12a and extends in the axial direction. The axial end of the pressing rib 12c is connected to the top wall 12 b. The other axial end of the pressing rib 12c is located on one axial side of the circuit board 5. The other axial end of the pressing rib 12c is axially opposed to the second board corner 5e of the circuit board 5. The plurality of pressing ribs 12c are arranged on the inner circumferential surface of the circumferential wall 12a at intervals in the circumferential direction. In the present embodiment, four pressing ribs 12c are arranged at equal intervals in the circumferential direction. The pressing rib 12c holds the substrate pressing portion 12d at the other end portion in the axial direction of the pressing rib 12 c.
The substrate pressing portion 12d is supported by the pressing rib 12 c. The substrate pressing portion 12d is fixed to the other axial end of the pressing rib portion 12 c. In the present embodiment, the substrate pressing portion 12d has a bottomed cylindrical shape. In the substrate pressing portion 12d, an end surface of the substrate pressing portion 12d facing the other axial side is a flat surface perpendicular to the central axis J. The substrate pressing portion 12d contacts the circuit board 5 from one axial side. The substrate pressing portion 12d is disposed to overlap the second substrate corner portion 5e when viewed from the axial direction. That is, the substrate pressing portion 12d overlaps the substrate corner portion 5 when viewed from the axial direction. The end surface of the substrate pressing portion 12d facing the other axial side is in contact with the second substrate corner portion 5e in the axial direction. When viewed from the axial direction, the end surface of the substrate pressing portion 12d facing the other axial side is circular. When viewed from the axial direction, the center of the end surface of the substrate pressing portion 12d facing the other axial side overlaps the second substrate corner portion 5 e. A part of the substrate pressing portion 12d protrudes from the circuit board 5 when viewed from the axial direction. That is, when viewed from the axial direction, a part of the outer peripheral surface of the substrate pressing portion 12d is located outside the outer peripheral edge of the substrate. Thus, the circuit board 5 can be fixed by the board pressing portion 12d while maintaining an area that can be effectively used for wiring in the circuit board 5.
According to the present embodiment, the circuit board 5 can be pressed and fixed from both sides in the axial direction by the end surface 34a of the tube portion 34 and the substrate pressing portion 12 d. Since the circuit board 5 can be fixed without using screws or the like, the number of manufacturing steps of the motor 1 can be reduced, and manufacturing is easy. Further, the substrate pressing portion 12d presses the second substrate corner portion 5e located at the outer peripheral portion of the circuit board 5, and therefore, the degree of freedom of the wiring pattern of the circuit board 5 can be maintained well. Further, since the substrate pressing portion 12d presses the second substrate corner portion 5e, interference with the pin 36, which is considered when the substrate pressing portion 12d presses the first substrate corner portion 5d, is suppressed, and the circuit board 5 is stably fixed. The center of the end surface of the substrate pressing portion 12d facing the other axial side overlaps the second substrate corner portion 5e, and thus the circuit board is more stably fixed. Since a part of the outer peripheral surface of the substrate pressing portion 12d is located outside the substrate outer peripheral surface when viewed from the axial direction, the circuit board 5 can be fixed without greatly reducing the area of the circuit board 5 that can be effectively used for wiring.
A plurality of substrate pressing portions 12d are provided. In the present embodiment, four substrate pressing portions 12d are provided at equal intervals in the circumferential direction. The number of the substrate pressing portions 12d and the number of the second substrate corner portions 5e are equal to each other. Each of the substrate pressing portions 12d presses each of the second substrate corner portions 5e from the axial direction. According to the present embodiment, the circuit board 5 can be fixed more stably by the plurality of substrate pressing portions 12 d.
The substrate pressing portion 12d is made of rubber or resin, and in the present embodiment, is made of rubber. According to the present embodiment, even if the substrate pressing portion 12d comes into contact with the circuit board 5, the circuit board 5 is not easily damaged. Further, since the substrate pressing portion 12d is made of a non-metal material, noise of the circuit board 5 can be suppressed as compared with a case where the circuit board 5 is fixed with a metal screw or the like, for example.
The annular rib 12e protrudes from an end surface of the peripheral wall 12a facing the other axial side toward the other axial side, and extends in the circumferential direction. The annular rib 12e is annular about the central axis J. The annular rib 12e is inserted into the annular groove 11 g.
The second lug portion 12g protrudes radially outward from the other end portion of the peripheral wall portion 12a in the axial direction. The second ear portions 12g are provided in plurality at intervals from each other in the circumferential direction. The second lug portion 12g has a screw insertion hole penetrating the second lug portion 12g in the axial direction. When viewed from the axial direction, each second ear portion 12g and each first ear portion 11i are arranged to overlap each other. Each second lug portion 12g and each first lug portion 11i are in contact with each other in the axial direction. The fastening screws 7 pass through the screw insertion holes of the second ear portions 12g and the screw insertion holes of the first ear portions 11i, and are screwed into the nut portions 11j, whereby the first case portion 11 and the second case portion 12 are fixed to each other.
The top wall 12b is a plate having a pair of plate surfaces facing in the axial direction. The outer peripheral portion of the top wall portion 12b is connected to one axial end of the peripheral wall portion 12 a. The second holder support tube 12f is a tube extending from the top wall portion 12b toward the other axial side.
The wiring holding member 16 is cylindrical and extends in the radial direction. The inside of the wiring holding member 16 passes through the inside and outside of the motor case 10. The wiring holding member 16 holds a part of the wiring member 9 on the inner peripheral surface of the wiring holding member 16. The wiring holding member 16 is disposed between the peripheral wall portion 11a of the first housing portion 11 and the peripheral wall portion 12a of the second housing portion 12 in the axial direction, and is held by the peripheral wall portion 11a and the peripheral wall portion 12 a.
In particular, although not shown, the wiring member 9 is electrically connected to an external power supply. The wiring member 9 is electrically connected to the circuit board 5. The wiring member 9 supplies power supplied from an external power supply to the circuit board 5. Although not shown, the wiring member 9 includes a power supply wiring, a signal wiring, and a ground wiring.
In addition, the respective configurations (components) described in the above embodiments may be combined, and addition, omission, replacement, and other changes of the configurations may be made without departing from the scope of the present invention. The present invention is not limited to the above embodiments, but is defined only by the claims.
Claims (7)
1. A motor is provided with:
a rotor supported to be rotatable about a central axis;
a stator surrounding the rotor from a radially outer side;
a circuit board electrically connected to the stator; and
a motor case that houses the rotor, the stator, and the circuit board,
the motor housing has:
a first case portion having a bottomed cylindrical shape, which houses at least the rotor and the stator; and
a second housing portion having a top cylindrical shape, which is connected to the first housing portion, and in which an opening of the second housing portion is opposed to an opening of the first housing portion,
the stator has:
a stator core having a core outer circumferential surface that surrounds the central axis and expands in a circumferential direction; and
an insulator fixed to the stator core,
the insulator has a cylindrical portion extending to one axial side than the stator core and surrounding the central axis,
an end surface of the cylindrical portion on one axial side is polygonal when viewed from the axial direction,
a pair of plate surfaces of the circuit board face to the axial direction, the circuit board contacts with the end surface from one axial side,
when viewed from the axial direction, the outer periphery of the substrate of the circuit board is polygonal,
the circuit board has a plurality of substrate corner portions arranged in a circumferential direction at an outer peripheral portion of the circuit board,
the second housing portion has a substrate pressing portion that is brought into contact with the circuit board from one axial side,
the substrate pressing portion overlaps with the substrate corner portion when viewed from the axial direction.
2. The motor of claim 1,
the substrate pressing portions are provided at equal intervals in the circumferential direction.
3. The motor according to claim 1 or 2,
when viewed from the axial direction, a part of the outer peripheral edge of the substrate pressing portion is located outside the outer peripheral edge of the substrate.
4. The motor according to any one of claims 1 to 3,
the end face has a plurality of corner portions arranged in a circumferential direction on an outer peripheral portion of the end face,
the cylindrical portion has a pin disposed in at least one of the corner portions and protruding from the end surface toward one axial side.
5. The motor of claim 4,
the plurality of substrate corners have:
a first substrate corner portion that is axially opposed to the corner portion where the pin is arranged among the plurality of corner portions; and
a second substrate corner portion axially opposed to the corner portion where the pin is not disposed among the plurality of corner portions,
the substrate pressing portion overlaps with the second substrate corner portion when viewed from the axial direction.
6. The motor of claim 5,
the first substrate corner is provided with a plurality of corners,
the second substrate corner is provided with a plurality of corners,
the first substrate corner portions and the second substrate corner portions are alternately arranged in the circumferential direction.
7. The motor according to any one of claims 1 to 6,
the substrate pressing portion is made of rubber or resin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019056254A JP2020162206A (en) | 2019-03-25 | 2019-03-25 | motor |
| JP2019-056254 | 2019-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111817505A true CN111817505A (en) | 2020-10-23 |
Family
ID=72640136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010064891.2A Pending CN111817505A (en) | 2019-03-25 | 2020-01-20 | Motor with a stator having a stator core |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020162206A (en) |
| CN (1) | CN111817505A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008029105A (en) * | 2006-07-20 | 2008-02-07 | Sanyo Denki Co Ltd | Stator for rotary electric machine |
| CN103219820A (en) * | 2012-01-20 | 2013-07-24 | 日本电产株式会社 | Motor |
| JP2013150520A (en) * | 2012-01-23 | 2013-08-01 | Aisin Seiki Co Ltd | Electric pump, and method of resin-molding housing for use in electric pump |
| CN203589927U (en) * | 2012-11-08 | 2014-05-07 | 日本电产伺服有限公司 | Motor |
| CN203827100U (en) * | 2014-03-28 | 2014-09-10 | 日本电产株式会社 | Motor and fan employing same |
| CN104734404A (en) * | 2013-12-20 | 2015-06-24 | 日本电产株式会社 | Inner-rotor motor |
| CN104868647A (en) * | 2014-02-20 | 2015-08-26 | 日本电产精密株式会社 | Vibration motor |
| CN205986447U (en) * | 2016-07-04 | 2017-02-22 | 湖州鸿远电机有限公司 | High motor of circuit board security |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6323146B2 (en) * | 2014-04-26 | 2018-05-16 | 日本電産株式会社 | Motor and blower |
-
2019
- 2019-03-25 JP JP2019056254A patent/JP2020162206A/en active Pending
-
2020
- 2020-01-20 CN CN202010064891.2A patent/CN111817505A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008029105A (en) * | 2006-07-20 | 2008-02-07 | Sanyo Denki Co Ltd | Stator for rotary electric machine |
| CN103219820A (en) * | 2012-01-20 | 2013-07-24 | 日本电产株式会社 | Motor |
| JP2013150520A (en) * | 2012-01-23 | 2013-08-01 | Aisin Seiki Co Ltd | Electric pump, and method of resin-molding housing for use in electric pump |
| CN203589927U (en) * | 2012-11-08 | 2014-05-07 | 日本电产伺服有限公司 | Motor |
| CN104734404A (en) * | 2013-12-20 | 2015-06-24 | 日本电产株式会社 | Inner-rotor motor |
| CN104868647A (en) * | 2014-02-20 | 2015-08-26 | 日本电产精密株式会社 | Vibration motor |
| CN203827100U (en) * | 2014-03-28 | 2014-09-10 | 日本电产株式会社 | Motor and fan employing same |
| CN205986447U (en) * | 2016-07-04 | 2017-02-22 | 湖州鸿远电机有限公司 | High motor of circuit board security |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020162206A (en) | 2020-10-01 |
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Application publication date: 20201023 |
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