CN102005854B - Vibration motor and assembling method thereof - Google Patents

Abstract

The invention provides a vibrating motor, which comprises a rotor, a rotating shaft connected with the rotor, a casing for accommodating the rotor, and a stator covered with the casing, and a first bearing for positioning together is installed on the casing, A second bearing for positioning is installed on the stator, and the rotating shaft is installed between the first bearing and the second bearing. The vibration motor provided by the invention can reduce the noise when the motor starts and stops.

Description

Vibration motor and assembly method thereof

technical field

The invention relates to a motor, in particular to a vibration motor and an assembly method thereof.

Background technique

With the development of new permanent magnet materials, microelectronics technology, automatic control technology and power electronics technology, vibration motors have made great progress. The vibration motor uses electronic commutation to replace the traditional mechanical commutation. With the advantages of reliable performance, no wear, low failure rate, small size and high efficiency, it has gradually moved from the initial military field to aerospace, medical, information, and home appliances. And the field of industrial automation is developing rapidly.

The vibrating motor of the related structure includes a rotor, a stator, a rotating shaft and a casing, the rotating shaft is riveted on the casing, the rotor is provided with a tray, the center of the tray is provided with a through hole, and a bearing is housed in the through hole, and the rotating The shaft passes through the through hole and is connected with the rotor, and then the rotating shaft is installed on the casing, and the stator is engaged with the casing. Thus, the bearing rotates around the central axis together with the rotor tray and other parts of the rotor. However, the length of a single bearing is limited, and since the rotor part of the vibration motor is an eccentric part, when the rotor of the product is stationary, due to the gap between the bearing and the rotating shaft, the rotor and the rotating shaft are not in a vertical state, so the product is in a state of starting and stopping and low speed There is serious friction between the hole walls at both ends of the lower rotary bearing and the rotating shaft, resulting in noise.

Therefore, it is necessary to provide a new vibration motor to solve the above problems.

Contents of the invention

The technical problem to be solved by the present invention is to provide a new vibration motor that reduces the noise when the vibration motor starts and stops.

According to the technical problems to be solved above, a vibrating motor is designed, which includes a rotor, a rotating shaft connected to the rotor, a housing for accommodating the rotor, and a stator covered with the housing. The rotor includes a rotor that can rotate around The tray rotating on the shaft, the magnet fixed on the tray and the bias weight. The rotating shaft is made of conductive material. The first bearing that acts together is installed on the stator, the second bearing that acts together for positioning is installed on the stator, the rotating shaft is installed between the first bearing and the second bearing, and the tray is provided with a support for the magnet. The supporting part and the protruding part extending from the supporting part to the outside of the tray to support the counterweight, the supporting part and the protruding part are provided with a certain height difference.

Preferably, the housing includes a bottom surface and a side wall extending from the bottom surface, a through hole is formed on the bottom surface, and the first bearing is installed in the through hole.

Preferably, the coils include a first coil, a second coil, a third coil and a fourth coil, the centerlines of adjacent coils are separated by 60°, and the stator is provided with a The bearing surface of the coil is placed, the bearing surface is provided with a groove, and the second bearing is placed in the groove.

Preferably, the groove includes a first step and a first side wall extending from the first step, and the second bearing is mounted on the first side wall.

The present invention also provides an assembly method of a vibration motor, which includes the following steps: providing a first bearing, a housing, a second bearing, a stator, a rotating shaft, and a rotor; The bearing is installed on the stator; the rotating shaft is first pressed into a copper sleeve, and then connected to the rotor; the rotating shaft is riveted with the first bearing, so that the rotating shaft and the casing are combined; then the other end of the rotating shaft is connected to the second The second bearing is riveted, so that the rotating shaft and the stator are combined; finally, the shell and the stator are assembled.

Preferably, a housing with a through hole on the bottom surface is provided, and the first bearing is installed in the through hole.

Preferably, a stator is provided with a bearing surface and a groove is provided on the bearing surface, and the second bearing is installed in the groove.

Preferably, a stator is provided with a first side wall in a groove, and the second bearing is installed on the first side wall of the groove.

The beneficial effect of the present invention is that: since the housing and the stator of the present invention are respectively equipped with positioning bearings, the effective length of the positioning rotor is lengthened to the greatest extent, and the rotor inclination is significantly improved, thereby effectively reducing the noise when the motor starts and stops , the improvement of the verticality of the rotor is also conducive to the rapid start of the motor.

Description of drawings

Fig. 1 is the three-dimensional exploded view of an embodiment of the vibrating motor of the present invention;

Fig. 2 is the sectional view of vibration motor of the present invention;

FIG. 3 is an enlarged schematic view of area A. FIG.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to FIGS. 1-2 , the vibration motor provided by the present invention includes a rotor 2 , a rotating shaft 4 connected to the rotor 2 , a casing 1 accommodating the rotor 2 , and a stator 3 covered with the casing 1 . The shell 1 is installed with a first bearing 6a for positioning, the stator 3 is equipped with a second bearing 6b for positioning, and the rotating shaft is installed between the first bearing 6a and the second bearing 6b.

The rotor 2 includes a tray 23 rotatable around the rotating shaft 4 , a magnet 21 fixed on the tray 23 and a bias weight 22 . The tray 23 is provided with a support portion 231 supporting the magnet 21 and a protruding portion 232 extending from the support portion 231 to the outside of the tray 23 to support the counterweight 22 , the support portion 231 and the protruding portion 232 are arranged There is a certain height difference. A riveting hole 231 is provided at the center of the tray 23 , and the rotating shaft 4 is pressed into a copper sleeve 5 first, and then riveted with the riveting hole 231 . The magnet 21 is in the shape of a ring, and it is provided with several spaced magnetic poles, and there is a magnetic gap between two adjacent magnetic poles, and the magnetic field strength of the magnetic gap is very weak.

The rotating shaft 4 is a short cylinder with an axis and made of conductive material.

The casing 1 is a hollow cylinder, which includes a circular bottom surface and a side wall extending from the bottom surface. The bottom surface and the side wall together form a storage space for accommodating the rotor. A through hole 11 is provided in the middle of the bottom surface, and the first bearing 6a is installed in the through hole 11 .

The stator 3 is provided with a base plate 33 and a bearing plate installed on the base plate 33. The bearing plate is provided with a bearing surface 31 opposite to the shell. The bearing surface 31 is provided with a magnet and four coils arranged in sequence, respectively the first coil 341 , the second coil 342 , the third coil 343 and the fourth coil 344 , the centerlines of adjacent coils are separated by 60°. A groove 32 is provided in the middle of the bearing surface 31 , and the second bearing 6 b is installed in the groove 32 . Referring to FIG. 3 , in this embodiment, the groove 32 includes a first step 321 and a first side wall 322 extending from the first step 321 , and the second bearing 6 b is installed on the first side wall 322 . The stator 3 is composed of a magnet (not shown) placed on the carrier plate, a coil and a bottom plate 33 on which the carrier plate is installed. In other embodiments, the stator can also be composed of a rear cover, magnets and coils placed on the rear cover.

A kind of assembly method of the present invention:

Provide the first bearing 6a, the housing 1 with through holes on the bottom surface, the second bearing 6b, the stator 3, the rotating shaft 4, the copper sleeve 5, the rotor 2, and the rotor 2 includes a tray 23 that can rotate around the rotating shaft 4, a fixed The magnet 21 and the bias weight 22 on the tray 23, the rotating shaft 4 is made of conductive material, the stator 3 is provided with a carrying plate, a magnet on the carrying plate, a coil and a bottom plate 33 for installing the carrying plate, the tray 23 is provided with a support portion 231 supporting the magnet 21 and a protruding portion 232 extending from the support portion 231 to the outside of the tray 23 to support the bias weight 22. The support portion 231 and the protruding portion 232 are provided with a certain The height difference; the bottom surface of the housing 1 is provided with a through hole 11, the stator 3 is provided with a bearing surface 31 with a groove 32, and the groove 32 is provided with a first side wall 322; the first Bearing 6a is installed in the through hole 11 of the bottom surface of shell 1, and the first bearing 6a is connected with shell 1; The second bearing 6b is installed on the first side wall 322 in the groove of stator bearing surface, makes the second bearing 6b is connected with the stator 3; the rotating shaft 4 is first pressed into a copper sleeve 5, and then connected with the rotor 2; the rotating shaft 4 is riveted with the first bearing 6a, so that the rotating shaft 4 is combined with the casing 1; The other end of the shaft 4 is riveted with the second bearing 6b, so that the rotating shaft 4 and the stator 3 are combined; the casing 1 and the stator 3 are assembled.

In the vibrating motor of the above-mentioned invention, since the first bearing 6a and the second bearing 6b that act together for positioning are respectively installed on the housing 1 and the stator 3, the effective length of the positioning rotor 2 is lengthened to the greatest extent, and the inclination of the rotor 2 is improved. Make the rotor 2 and the rotating shaft 4 in a vertical state, avoiding the friction between the hole walls at both ends of the rotating bearing and the rotating shaft 4 when the motor starts and stops and at low speed, thereby reducing the noise when the motor starts and stops, and also Conducive to the rapid rotation of the motor.

The protection scope of the present invention is not limited to the above-mentioned embodiments, but all equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention shall be included in the protection scope described in the claims.

Claims (8)

1. vibrating motor, it comprises rotor, the rotation axis that links to each other with rotor, accommodate the shell of described rotor, and the stator that connects with described casing cover, described rotor comprises can be around the pallet of rotation axis rotation, be fixed on magnet and weighting block on the pallet, described rotation axis is made of electric conducting material, described stator is provided with carrier, be positioned at the magnet on the carrier, coil and the base plate that carrier is installed, it is characterized in that: a clutch shaft bearing that plays the role of positioning is installed on the described shell, one the second bearing that plays the role of positioning is installed on the described stator, described rotation axis is installed between described clutch shaft bearing and the second bearing, described pallet is provided with the protuberance of the support portion of supporting described magnet and the described weighting block of support that extends to the pallet outside from described support portion, and described support portion and protuberance are provided with certain difference in height.

2. vibrating motor according to claim 1 is characterized in that: described shell comprises bottom surface and the sidewall that extends from the bottom surface, is provided with through hole in the bottom surface, and described clutch shaft bearing is installed in the described through hole.

3. vibrating motor according to claim 1, it is characterized in that: described coil comprises the first coil, the second coil, tertiary coil and the 4th coil, the interval is 60 ° between the center line of adjacent described coil, described stator is provided with the loading end that be used for place coil relative with described shell, described loading end is provided with groove, and described the second bearing places groove.

4. vibrating motor according to claim 3 is characterized in that: described groove comprises first step and the first side wall that extends from first step, and described the second bearing is installed on the described the first side wall.

5. the assemble method of a vibrating motor is characterized in that this assemble method may further comprise the steps: provide clutch shaft bearing, shell, the second bearing, stator, rotation axis, rotor; Clutch shaft bearing is installed on the shell, the second bearing is installed on the stator; Described rotor comprises can be around the pallet of rotation axis rotation, be fixed on magnet and weighting block on the pallet, described rotation axis is made of electric conducting material, described stator is provided with carrier, is positioned at magnet, the coil on the carrier and the base plate that carrier is installed, described pallet is provided with the protuberance of the support portion of supporting described magnet and the described weighting block of support that extends to the pallet outside from described support portion, and described support portion and protuberance are provided with certain difference in height; Rotation axis is pressed into first a copper sheathing, then rotation axis is fixedly connected with described rotor together with copper sheathing, described rotation axis is fixedly connected with described rotor by copper sheathing; With rotation axis and clutch shaft bearing riveted joint, rotation axis and shell are combined; The other end and the riveted joint of the second bearing with rotation axis make rotation axis and stator combination together; With shell and stator assembling.

6. the assemble method of vibrating motor according to claim 5 is characterized in that: the shell of a bottom surface with through hole is provided, described clutch shaft bearing is installed in the described through hole.

7. the assemble method of vibrating motor according to claim 5 is characterized in that: provide one to be provided with loading end, and loading end establishes reeded stator, described the second bearing is installed in the described groove.

8. the assemble method of vibrating motor according to claim 7 is characterized in that: the stator that is provided with the first side wall in the groove is provided, described the second bearing is installed on the first side wall of described groove.

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