CN216290455U

CN216290455U - Motor and electronic device

Info

Publication number: CN216290455U
Application number: CN202122374833.2U
Authority: CN
Inventors: 郭佳杰; 钟亮; 张磊
Original assignee: Nidec Dongguan Co Ltd
Current assignee: Nideco Electric Dongguan Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-04-12
Anticipated expiration: 2031-09-29

Abstract

The utility model relates to the technical field of motors, and provides a motor and an electronic device, wherein the motor is provided with a stator and a rotor: the stator, comprising: the motor comprises a bearing retainer, a stator core, a circuit board and a coil; the rotor, comprising: a shaft, a rotor frame, a rotor magnet; the bearing retainer is provided with a disc-shaped base part, a first extension part and a second extension part, wherein the first extension part and the second extension part extend in a cylindrical shape along two sides in the axial direction in the center of the base part; the axial dimension of the first extension is greater than the axial dimension of the second extension; the stator core is fixed on the outer periphery of the first extension part, and a first bearing accommodating part for accommodating a first bearing is arranged at the end part of the first extension part far away from the base part; the end of the second extension part is provided with a second bearing accommodating part for accommodating a second bearing; the radial dimension of the first bearing receiving portion is smaller than the radial dimension of the second bearing receiving portion. The utility model can prolong the service life of the motor and reduce the cost.

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

In the field of air conditioners such as fans and air cleaners, AC motors and DC brushless (brush) motors are mainly used. At present, the AC motor structure generally uses a double-oil-containing bearing structure, and has the problems of large volume, no control loop, low rotating speed, low service life and poor efficiency. The DC brush motor structure carries out phase change through the carbon brush, has large friction sound and short service life; the use of oil-impregnated bearings is structurally complex and has poor sound and vibration. The DC brushless motor structure has a complex structure, short service life and poor sound and vibration by using an oil-containing bearing; the double-ball bearing structure is high in price; the metal bearing cavity is used, and the price is high.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problems and provides a motor and electronic equipment to solve the problems of sound and vibration of an oil-retaining bearing caused by one-time rotation; and the service life of the motor is prolonged, and the cost is reduced.

The present invention provides a motor having a stator and a rotor:

the stator, comprising: the motor comprises a bearing retainer, a stator core, a circuit board and a coil;

the rotor, comprising: a shaft, a rotor frame, a rotor magnet;

the bearing retainer is provided with a disc-shaped base part, a first extension part and a second extension part, wherein the first extension part and the second extension part extend in a cylindrical shape along two sides in the axial direction in the center of the base part;

the axial dimension of the first extension is greater than the axial dimension of the second extension;

the stator core is fixed on the outer periphery of the first extension part, and a first bearing accommodating part for accommodating a first bearing is arranged at the end part of the first extension part far away from the base part;

the end of the second extension part is provided with a second bearing accommodating part for accommodating a second bearing;

the radial dimension of the first bearing receiving portion is smaller than the radial dimension of the second bearing receiving portion.

Preferably, an inner peripheral dimension of the first extending portion is gradually reduced toward the first bearing housing portion.

Preferably, an end surface of the first bearing receiving portion on the side close to the base portion has a groove.

Preferably, a step part is arranged on one side of the base part close to the first extension part;

a first claw part protruding to the radial outside is arranged on the outer periphery of the step part;

the circuit board is disposed on an outer periphery of the stepped portion and fixed by the first claw portion.

Preferably, the first claw portion is provided in plurality and arranged uniformly in a circumferential direction.

Preferably, an outer periphery of the second bearing accommodating portion on a side away from the base portion has a second claw portion protruding radially inward;

the second bearing is axially fixed by the second claw.

Preferably, the second claw portion is provided in plurality and arranged uniformly in a circumferential direction.

Preferably, the second bearing receiving portion has a plurality of mounting portions on an outer periphery thereof, to which the motor can be mounted;

the mounting portion and the second claw portion are not in the same radial direction.

Preferably, the bearing holder is a resin-molded component.

Correspondingly, the utility model further provides electronic equipment, and the electronic equipment is provided with the motor provided by any embodiment of the utility model.

The utility model provides a motor and an electronic device, which solve the problems of sound and vibration caused by a primary rotation component of an oil-retaining bearing by using a mixed bearing (a ball bearing and the oil-retaining bearing); the utility model reduces the axial fixing parts needed by oil, reduces the cost and prolongs the service life of the motor. The bearing accommodating part is provided with a buckle structure to fix the bearing, so that the overall impact resistance of the motor is improved. Through at the bearing chamber design groove, add the grease mode, improve the oiliness bearing life-span. The bearing retainer is a resin integrally molded component, so that the bearing retainer is easy to mold and reduces the cost. The present invention improves the rotational speed and efficiency by using a DC brushless motor structure.

Drawings

FIG. 1 is a cross-sectional view of a motor provided by the present invention along an axis;

FIG. 2 is a first schematic structural view of a bearing retainer provided by the present invention;

fig. 3 is a structural schematic diagram of a bearing retainer provided by the utility model.

Reference numerals: 1. a bearing retainer; 2. a stator core; 3. a circuit board; 4. a shaft; 5. a rotor frame; 6. a rotor magnet; 7. a first bearing; 8. a second bearing; 101. a base; 102. a first extension portion; 103. a second extension portion; 104. a first bearing receiving portion; 105. a second bearing receiving portion; 106. a groove; 107. a step portion; 108. a first claw portion; 109. a second claw portion; 110. an installation part.

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 utility model and are not limiting of the utility model. 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 and a rotor. The stator, comprising: bearing holder 1, stator core 2, circuit board 3, coil. The rotor, comprising: shaft 4, rotor frame 5, rotor magnet 6.

As shown in fig. 2 and 3, the bearing holder 1 has a disc-shaped base 101, and a first extending portion 102 and a second extending portion 103 that extend in a cylindrical shape on both sides in the axial direction at the center of the base 101; the axial dimension of the first extension 102 is greater than the axial dimension of the second extension 103; the stator core 2 is fixed to the outer periphery of the first extending portion 102, and a first bearing accommodating portion 104 for accommodating the first bearing 7 is provided at an end portion of the first extending portion 102 away from the base portion 101; the end of the second extension 103 has a second bearing receiving portion 105 that receives the second bearing 8; the radial dimension of the first bearing receiving portion 104 is smaller than the radial dimension of the second bearing receiving portion 105. Wherein, the first bearing 7 adopts an oil-containing bearing, and the second bearing 8 adopts a ball bearing. The bearing holder 1 is a resin-integrated molded component, and is easily molded.

The motor of this embodiment, through setting up two bearing housing parts that size is different, dispose the oiliness bearing in the bearing housing part that the size is less, dispose ball bearing in the bearing housing part that the size is great, through the mode that the bearing was used in mixture, can reduce the cost of motor when guaranteeing the motor rigidity to through adopting ball bearing, can reduce the noise of motor, improve the performance of motor.

The inner peripheral dimension of the first extension 102 is gradually reduced toward the first bearing receiving portion 104. The rigidity near the bearing housing portion can be improved by gradually reducing the inner peripheral dimension without changing the outer peripheral dimension of the extended portion.

The end surface of the first bearing receiving portion 104 on the side close to the base portion has a groove 106. By providing the groove 106 in the end surface of the first bearing housing portion 104, it is possible to store the lubricating oil in the groove 106. When the oil-retaining bearing is used, the lubricating oil can provide lubricant for the oil-retaining bearing, and the service life of the oil-retaining bearing is prolonged.

A step part 107 is arranged on one side of the base part 101 close to the first extension part 102; a first claw portion 108 protruding radially outward is provided on the outer periphery of the step portion 107; the circuit board 3 is disposed on the outer periphery of the step portion 107 and fixed by the first claw portion 108. The first claw portions 108 are provided in plural and arranged uniformly in the circumferential direction. The circuit board 3 can be relatively easily fixed to the base 101 by providing the structure of the claw portion and the step portion. By providing the plurality of first claw portions 108, the circuit board 3 is more easily fixed.

The outer periphery of the second bearing receiving portion 105 on the side away from the base 101 has a second claw portion 109 protruding radially inward; the second bearing 8 is fixed in the axial direction by the second claw portion 109. The second claw portions 109 are provided in plural and are arranged uniformly in the circumferential direction. The utility model can improve the whole shock resistance of the motor by designing the claw part structure at the ball bearing of the resin bearing cavity. By providing the plurality of second claw portions 109, the overall impact resistance of the motor is further improved.

The outer circumference of the second bearing receiving portion 105 is provided with a plurality of mounting portions 110 to which the motor can be mounted to other devices; the attachment portion 110 is not in the same radial direction as the second claw portion 109, and the rigidity of the second claw portion 109 is ensured while the attachment portion is integrally molded.

The utility model adopts a mixed bearing (ball bearing and oil-retaining bearing) mode, uses the ball bearing at the position with larger stress at one side far away from the rotor frame 5, and uses the oil-retaining bearing at the position with smaller stress at one side close to the rotor frame 5, thereby improving the problem of low service life of the motor caused by only using the oil-retaining bearing. The shaft 4 and the upper part of the shaft are axially fixed through the ball bearing, so that the axial fixing parts required by the oil bearing are reduced, and the cost is reduced.

When the motor rotates, the ball bearing plays a main supporting role, the oil bearing plays an auxiliary role, and the problems of large vibration and abnormal sound caused by only using the oil bearing are solved. The bearing holder 1 using resin and the oil-impregnated bearing have the effect of reducing the cost. The impact resistance of the whole motor is improved by designing a snap sample in the resin bearing retainer 1. By designing the groove 106 at the first bearing housing portion 104 of the resin, the same grease as that of the oil-impregnated bearing is added at the groove 106, and the oil-impregnated bearing life is improved.

Example two

The electronic equipment provided by the embodiment of the utility model is provided with the motor provided by any embodiment of the utility model.

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 utility model 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

1. A motor having a stator and a rotor:

the stator, comprising: the motor comprises a bearing retainer (1), a stator core (2), a circuit board (3) and a coil;

the rotor, comprising: a shaft (4), a rotor frame (5), and a rotor magnet (6);

the method is characterized in that:

the bearing retainer (1) is provided with a disc-shaped base part (101), and a first extension part (102) and a second extension part (103) which extend in a cylindrical shape along two sides in the axial direction in the center of the base part (101);

the axial dimension of the first extension (102) is greater than the axial dimension of the second extension (103);

the stator core (2) is fixed on the outer periphery of the first extension part (102), and the end part of the first extension part (102) far away from the base part (101) is provided with a first bearing accommodating part (104) for accommodating a first bearing (7);

the end of the second extension (103) has a second bearing receiving portion (105) that receives a second bearing (8);

the radial dimension of the first bearing receptacle (104) is smaller than the radial dimension of the second bearing receptacle (105).

2. The motor according to claim 1, wherein an inner peripheral dimension of the first extension portion (102) is tapered toward the first bearing receiving portion (104).

3. The motor according to claim 2, wherein an end surface of the first bearing receiving portion (104) on a side close to the base portion has a groove (106).

4. The motor according to claim 1, characterized in that a step (107) is provided on the base (101) on the side close to the first extension (102);

a first claw part (108) protruding to the outside in the radial direction is arranged on the outer periphery of the step part (107);

the circuit board (3) is disposed on the outer periphery of the step portion (107) and is fixed by the first claw portion (108).

5. The motor according to claim 4, wherein the first claw portion (108) is provided in plurality and arranged uniformly in a circumferential direction.

6. The motor according to claim 1, wherein an outer periphery of the second bearing receiving portion (105) on a side away from the base portion (101) has a second claw portion (109) protruding radially inward;

the second bearing (8) is axially fixed by the second claw portion (109).

7. The motor according to claim 6, wherein the second claw portion (109) is provided in plurality and arranged uniformly in a circumferential direction.

8. The motor according to claim 6, wherein the outer circumference of the second bearing receiving portion (105) is provided with a plurality of mounting portions (110) to which the motor can be mounted to other equipment;

the mounting portion (110) and the second claw portion (109) are not in the same radial direction.

9. The motor according to any one of claims 1 to 8, wherein the bearing holder (1) is a resin-integrated component.

10. An electronic device characterized in that the electronic device has the motor of any one of claims 1 to 9.