CN112737194B - Motor and electronic device - Google Patents

Motor and electronic device Download PDF

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Publication number
CN112737194B
CN112737194B CN202011556029.XA CN202011556029A CN112737194B CN 112737194 B CN112737194 B CN 112737194B CN 202011556029 A CN202011556029 A CN 202011556029A CN 112737194 B CN112737194 B CN 112737194B
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CN
China
Prior art keywords
circuit board
motor
sleeve
rotor
bearing
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Application number
CN202011556029.XA
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Chinese (zh)
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CN112737194A (en
Inventor
由忠磊
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Nideco Electric Dongguan Co ltd
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Nidec Dongguan Co ltd
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Priority to CN202011556029.XA priority Critical patent/CN112737194B/en
Publication of CN112737194A publication Critical patent/CN112737194A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/02Casings or enclosures characterised by the material thereof

Abstract

The invention relates to the technical field of motors, and provides a motor and an electronic device, wherein the motor is provided with: a stator, a rotor, and a bearing; a stator, comprising: a stator core, a coil, a circuit board and a bearing holder; a rotor, comprising: a shaft, a rotor frame and a rotor magnet; the bearing is fixed on the bearing retainer, sleeved on the shaft and used for supporting the rotor in a rotatable state through the shaft; the bearing holder has: a metal sleeve portion and a resin base portion; the base part is fixedly arranged at one axial end of the sleeve part; the base portion has an extension portion extending toward the sleeve portion and surrounding one end of the sleeve portion. The invention can easily form the bearing retainer, is easy to process and saves working hours.

Description

Motor and electronic device
Technical Field
The present invention relates to the field of motor technologies, and in particular, to a motor and an electronic device.
Background
Motors are widely used in various electric appliances, such as refrigerators, washing machines, air conditioners, clocks, fans, etc., which are in contact with daily work and life.
In the existing motor structure, the motor base and the bearing sleeve are made of metal stamping parts or metal casting parts, and the die is difficult to machine and high in component cost due to the fact that the shape is complex and the protruding parts are multiple. Meanwhile, in order to facilitate assembly and positioning, positioning ribs are required to be formed on the surface of the part, or the protruding parts are used for positioning; the positioning rib is formed by punching or metal pouring, the rib position pattern is difficult to process, the cost of raw materials is high, and the reject ratio is difficult to control. And when the stator is assembled, a step surface is reserved to support the stator, so that the volume of the sleeve is overlarge. In addition, when the circuit board is fixed, the flanging shape is riveted through deformation, additional auxiliary components are needed, and pressure needs to be accurately controlled.
Disclosure of Invention
The invention mainly solves the technical problems of high die processing difficulty, high part cost and the like caused by complex appearance and a plurality of convex parts of a motor base and a bearing sleeve which are made of metal stamping parts or metal casting parts in the motor structure in the prior art, and provides a motor and electronic equipment, wherein a bearing retainer can be easily formed, the processing is easy, and the working time is saved.
The present invention provides a motor having:
a stator, comprising: a stator core, a coil, a circuit board and a bearing holder;
a rotor, comprising: a shaft, a rotor frame and a rotor magnet;
the bearing is fixed on the bearing retainer, sleeved on the shaft and used for supporting the rotor in a rotatable state through the shaft;
the bearing holder has: a metal sleeve portion and a resin base portion;
the base part is fixedly arranged at one axial end of the sleeve part;
the base portion has an extension portion extending toward the sleeve portion and surrounding one end of the sleeve portion.
Preferably, the sleeve portion is cylindrical and has a large diameter portion and a small diameter portion having different outer diameters;
the extension portion surrounds an outer periphery of the small diameter portion.
Preferably, the extension part is formed with a positioning part protruding to the radial outer side;
the stator core is located on the radial outer side of the extending portion and has a recess portion engaged with the positioning portion.
Preferably, the circuit board has a central hole portion axially penetrating therethrough, the extension portion passing through the central hole portion;
the central hole portion has a recess portion that mates with the positioning portion.
Preferably, the base portion further has a platform portion extending in a radial direction;
the circuit board is fixed to the platform portion.
Preferably, the platform portion has a plurality of projections projecting in the axial direction; the plurality of protrusions are uniformly distributed in the circumferential direction;
the circuit board is fixed to the stage portion through the protruding portion.
Preferably, the circuit board is provided with a circuit board through hole arranged axially;
the end part of the protruding part is provided with a buckling part which penetrates through the through hole of the circuit board to fix the circuit board on the platform part.
Preferably, an upper end of the protrusion abuts against the stator core in the axial direction.
Preferably, the platform part has a plurality of mounting parts extending to the radial outer side and one side far away from the axial direction of the sleeve part;
the plurality of mounting portions are evenly distributed in the circumferential direction.
Correspondingly, the invention further provides electronic equipment, and the electronic equipment is provided with the motor provided by any embodiment of the invention.
Compared with the prior art, the motor and the electronic equipment provided by the invention have the following advantages:
1. the sleeve part with complex appearance is divided into two simple structures to be combined by injection molding and injection molding through the structure of integrally molding the sleeve part made of metal and the base part made of resin, so that the appearance of a metal part is simplified, a bearing retainer can be easily formed, the processing is easy, the working hours are saved, and the production efficiency is improved.
2. When the base part is molded, the positioning part can be made, the processing is convenient, and no extra cost is generated.
3. When the stator is assembled, a step surface is not needed, and when the protruding part is assembled with the stator, the step surface is not needed to be made, and only the protruding part is used for supporting, so that the size of the sleeve is reduced.
4. When the circuit board is fixed, the circuit board is pressed to the protruding portion, the clamping portion is arranged at the top end of the protruding portion, the circuit board can be fixedly installed through the clamping portion, auxiliary tools are not needed, and installation efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a motor provided in the present invention;
FIG. 2 is a schematic structural view of a bearing cage provided by the present invention;
FIG. 3 is a schematic structural view of a base section provided by the present invention;
FIG. 4 is a schematic structural view of a sleeve portion provided in the present invention;
FIG. 5 is a schematic diagram of a circuit board according to the present invention;
fig. 6 is a schematic diagram of the mating of the bearing retainer and the circuit board provided by the present invention.
Reference numerals: 1. a bearing retainer; 2. a circuit board; 3. a stator core; 4. a bearing; 5. a shaft; 6. a rotor frame; 7. a rotor magnet; 101. a sleeve portion; 102. a base part; 103. a large diameter portion; 104. a small diameter part; 105. an extension portion; 106. a positioning part; 107. a platform part; 108. a protrusion portion; 109. an installation part; 201. a central hole portion; 202. a circuit board through hole.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Example one
As shown in fig. 1, a motor according to an embodiment of the present invention includes: a stator, comprising: a stator core 3, a coil, a circuit board 2 and a bearing holder 1; a rotor, comprising: a shaft 5, a rotor frame 6, and a rotor magnet 7; and the bearing 4 is fixed on the bearing retainer 1, sleeved on the shaft 5 and used for supporting the rotor to be in a rotatable state through the shaft 5. Specifically, the stator core 3, the circuit board 2 and the bearing 4 are respectively fixed on a bearing retainer 1, and the bearing retainer 1 is fixed on a casing. The coil is wound around the stator core 3. The shaft 5 is arranged in the motor axial direction; a rotor frame 6 is provided at an end of the shaft 5, and a rotor magnet 7 is provided on the rotor frame 6.
Fig. 1 is a schematic structural diagram of a motor, but the present embodiment is not limited to the motor structure provided in fig. 1, and the circuit board 1 provided in the present embodiment can be adapted to motors of various models.
The bearing holder 1 includes: a metal sleeve portion 101 and a resin base portion 102; as shown in fig. 2 to 4, the base portion 102 is fixedly disposed at one axial end of the sleeve portion 101; the base portion 102 has an extension portion 105 extending toward the sleeve portion 101 and surrounding one end of the sleeve portion 101. In the present embodiment, the bearing holder 1 can be formed relatively easily by the structure in which the sleeve portion 101 made of a metal material and the base portion 102 made of a resin material are coupled to each other, and the bearing holder can be easily processed and can be manufactured with reduced man-hours.
The sleeve portion 101 is cylindrical and has a large diameter portion 103 and a small diameter portion 104 having different outer diameter dimensions; the extension 105 surrounds the outer periphery of the small diameter portion 104. One bearing 4 is mounted in the large diameter portion 103, and the other bearing 4 is mounted in the base portion 102. The stator core 3 is attached to the outside of the large diameter portion 103 and the extension portion 105. By providing the large diameter portion 103 and the small diameter portion 104 in the sleeve portion 101 and then covering the outer periphery of the small diameter portion with the extension portion 105, the outer periphery of the extension portion 105 and the outer periphery of the large diameter portion 103 can be positioned in the same longitudinal dimension after molding, in which case the stator core 3 can be more easily mounted on the outer periphery thereof.
The extension 105 is formed with a positioning portion 106 projecting radially outward; the stator core 3 is located radially outside the extending portion 105 and has a recess portion that engages with the positioning portion 106. By forming the positioning projection on the extending portion 105 of the resin material, the processing can be easily performed, and the stator core 3 can be positioned and attached to the outer periphery of the bearing holder 1 by the positioning portion 106.
As shown in fig. 5 and 6, the circuit board 2 has a central hole 201 passing through in the axial direction and a circuit board through hole 202 provided in the axial direction. The extension portion 105 passes through the central hole portion 201; the central hole portion 201 has a recess portion that engages with the positioning portion 106. The circuit board 2 can be positioned in the circumferential direction by the positioning portions 106.
Said base part 102 further has a radially extending platform part 107; the circuit board 2 is fixed to the stage portion 107. Through setting up platform portion 107, fix circuit board 2 in platform portion 107, make things convenient for the installation of circuit board 2 fixed. The platform portion 107 has a plurality of projections 108 projecting in the axial direction; the plurality of protrusions 108 are uniformly distributed in the circumferential direction; the circuit board 2 is fixed to the stage portion 107 by a protrusion portion 108. The end of the protrusion 108 has a snap-fit portion that passes through the circuit board through-hole 202 to secure the circuit board 2 to the platform 107. By fixing the circuit board 2 by providing the protrusion 108, the circuit board 2 can be fixed more easily; the circuit board 2 is fixedly installed through the buckling part, and the installation efficiency is improved. The upper end of the protrusion 108 is in axial contact with the stator core 3, and the stator core 3 can be positioned in the axial direction more favorably.
The platform part 107 has a plurality of mounting parts 109 extending radially outward and axially away from the sleeve part 101; the plurality of mounting portions 109 are evenly distributed in the circumferential direction. By integrally forming the mounting portion 109 in the base portion, man-hours can be saved, and the motor can be relatively easily mounted to the electronic apparatus.
The motor provided by the embodiment can easily form the bearing retainer by the combination of the sleeve part made of metal and the base part made of resin, is easy to process, saves labor and improves production efficiency.
Example two
The embodiment provides electronic equipment, and the electronic equipment comprises the motor provided by any embodiment of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some or all technical features may be made without departing from the scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. A motor, comprising:
a stator, comprising: a stator core, a coil, a circuit board and a bearing holder;
a rotor, comprising: a shaft, a rotor frame and a rotor magnet;
the bearing is fixed on the bearing retainer, sleeved on the shaft and used for supporting the rotor in a rotatable state;
the method is characterized in that:
the bearing holder has: a metal sleeve portion and a resin base portion;
the base part is fixedly arranged at one axial end of the sleeve part;
the base portion has an extension portion extending toward the sleeve portion and surrounding one end of the sleeve portion;
the sleeve portion is cylindrical and has a large diameter portion and a small diameter portion having different outer diameter dimensions; the extension portion surrounds an outer periphery of the small diameter portion;
the extension part is provided with a positioning part protruding towards the radial outer side; the stator core is positioned at the radial outer side of the extension part and is provided with a concave part matched with the positioning part;
the base portion further has a platform portion extending in a radial direction; the circuit board is fixed on the platform part;
the platform part is provided with a plurality of protruding parts protruding in the axial direction; the plurality of protrusions are uniformly distributed in the circumferential direction; the circuit board is fixed on the platform part through the protruding part;
the upper end of the protrusion abuts against the stator core in the axial direction.
2. The motor according to claim 1, wherein the circuit board has a central hole portion axially therethrough, the extension portion passing through the central hole portion;
the central hole portion has a recess portion that mates with the positioning portion.
3. The motor of claim 1, wherein the circuit board has axially disposed circuit board through holes;
the end part of the protruding part is provided with a buckling part which penetrates through the through hole of the circuit board to fix the circuit board on the platform part.
4. The motor according to claim 1, wherein the platform portion has a plurality of mounting portions extending radially outward and to a side away from the sleeve portion in the axial direction;
the plurality of mounting portions are evenly distributed in the circumferential direction.
5. An electronic apparatus characterized in that the electronic apparatus has the motor of any one of claims 1 to 4.
CN202011556029.XA 2020-12-25 2020-12-25 Motor and electronic device Active CN112737194B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011556029.XA CN112737194B (en) 2020-12-25 2020-12-25 Motor and electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011556029.XA CN112737194B (en) 2020-12-25 2020-12-25 Motor and electronic device

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Publication Number Publication Date
CN112737194A CN112737194A (en) 2021-04-30
CN112737194B true CN112737194B (en) 2022-04-12

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0686523A (en) * 1992-09-04 1994-03-25 Matsushita Electric Ind Co Ltd Commutator-less motor
KR20130011667A (en) * 2011-07-22 2013-01-30 엘지이노텍 주식회사 Traction motor
CN103016389A (en) * 2011-09-23 2013-04-03 富瑞精密组件(昆山)有限公司 Bearing seat and radiating fan using same
CN204408074U (en) * 2015-01-21 2015-06-17 中山大洋电机股份有限公司 A kind of external rotor electric machine
CN206250860U (en) * 2016-12-22 2017-06-13 日本电产(东莞)有限公司 Motor
CN107040072A (en) * 2016-02-03 2017-08-11 德昌电机(深圳)有限公司 Motor and its support base

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8304969B2 (en) * 2010-01-13 2012-11-06 Asia Vital Components Co., Ltd. Heat insulation structure for cooling fan
US8179005B2 (en) * 2010-01-25 2012-05-15 Sunonwealth Electric Machine Industry Co., Ltd. Motor
JP5264859B2 (en) * 2010-10-24 2013-08-14 三菱電機株式会社 Rotor of motor for pump, pump, air conditioner, floor heating device and hot water supply device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0686523A (en) * 1992-09-04 1994-03-25 Matsushita Electric Ind Co Ltd Commutator-less motor
KR20130011667A (en) * 2011-07-22 2013-01-30 엘지이노텍 주식회사 Traction motor
CN103016389A (en) * 2011-09-23 2013-04-03 富瑞精密组件(昆山)有限公司 Bearing seat and radiating fan using same
CN204408074U (en) * 2015-01-21 2015-06-17 中山大洋电机股份有限公司 A kind of external rotor electric machine
CN107040072A (en) * 2016-02-03 2017-08-11 德昌电机(深圳)有限公司 Motor and its support base
CN206250860U (en) * 2016-12-22 2017-06-13 日本电产(东莞)有限公司 Motor

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Address after: 523273 No.3 Industrial Zone, Gaolong Road, Gaopo Town, Dongguan City, Guangdong Province

Patentee after: NIDECO Electric (Dongguan) Co.,Ltd.

Address before: 523273 third industrial zone, Gaolong Road, gaoshe Town, Dongguan City, Guangdong Province

Patentee before: NIDEC (DONGGUAN) CO.,LTD.