CN217307369U

CN217307369U - Rotor assembly of oscillating motor for electric toothbrush

Info

Publication number: CN217307369U
Application number: CN202122980356.4U
Authority: CN
Inventors: 李军; 郭志焱; 蔡选杰
Original assignee: Zhejiang Baolong Mechanical And Electrical Co ltd
Current assignee: Zhejiang Baolong Mechanical And Electrical Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-08-26
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a rotor subassembly of oscillating motor for electric toothbrush, including rotor core, permanent magnet and pivot, the rotor core cover establish in the pivot and with pivot fixed connection, be formed with two loading faces that parallel on the rotor core periphery wall, rotor core is provided with the joint arch in loading face both sides, be provided with a plurality of on the loading face and be used for the binding face with the permanent magnet laminating, it is protruding to be provided with the location between the adjacent binding face, the permanent magnet includes the first face that pastes mutually with the binding face and the second face that carries on the back mutually with the first face, connect through connecting the face between first face and the second face, connect the face and the protruding or protruding conflict setting in location of joint, protruding and the joint of location highly is less than 1/2 permanent magnet thickness setting. The permanent magnet fixing device is simple in structure, can effectively fix the permanent magnet and prevent the permanent magnet from falling off, and the driving force of the whole structure is stronger.

Description

Rotor assembly of oscillating motor for electric toothbrush

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to a rotor subassembly of oscillating motor for electric toothbrush.

Background

Electric toothbrushes are new products that have become popular in recent years and have revolutionized the oral care field abroad. Along with the wide popularization of the electric toothbrush in China and the improvement of the cognition of people, the electric toothbrush also becomes an important member of the public health care products. The investigation shows that compared with the common toothbrush, the electric toothbrush is more scientific and effective, can more thoroughly remove dental plaque and reduce gingivitis and gingival bleeding, and can generate high-frequency vibration by the quick reciprocating rotation of the output shaft of the motor, so that toothpaste is instantly decomposed into fine foam to deeply clean teeth; the motor in the existing electric toothbrush usually adopts an alternating current motor, thereby realizing the left-right swing of the electric toothbrush head and realizing the purpose of cleaning teeth, and the existing electric toothbrush motor usually comprises a stator component, a shell and a rotor component, wherein the rotor component comprises a rotating shaft and a rotor core, the rotor core is fixedly connected with the rotating shaft, the rotor core is internally provided with a permanent magnet, the rotating shaft is provided with a bearing, the rotating shaft is combined with the shell through the bearing to realize the reciprocating rotation of the rotating shaft, but the existing rotor core structure usually surrounds and fixes the permanent magnet, so that even if the surrounding structure at the corresponding position of the permanent magnet is arranged to be very light and thin, the phenomenon of magnetic short circuit of part of the permanent magnet can be caused, the magnetic loss of 5 to 10 percent can be generated, the output effect of the whole structure is influenced, and the expected extreme value of the rotating amplitude can not be reached; and in order to reduce the loss of magnetic force, can set up the permanent magnet into fan-shaped at present, and set up the inlay groove on rotor core outer wall, install fan-shaped permanent magnet that sets up in the inlay groove, simultaneously because its fan-shaped setting, the suction effort that leads to its outer fringe to receive is big, and the inner edge atress is little for permanent magnet stable in structure, change the emergence and break away from, need pass through the glue adhesion, but after long-time the use, glue is ageing, also can make the permanent magnet drop.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a rotor subassembly of oscillating motor for electric toothbrush, its simple structure can more effectual fixed permanent magnet, avoids the permanent magnet to drop for overall structure's drive power is stronger.

For realizing the above-mentioned purpose, the utility model provides a rotor subassembly of oscillating motor for electric toothbrush, including rotor core, permanent magnet and pivot, the rotor core cover establish in the pivot and with pivot fixed connection, be formed with two loading faces that parallel on the rotor core periphery wall, rotor core is provided with the joint arch in loading face both sides, be provided with a plurality of on the loading face and be used for the binding face with the permanent magnet laminating, it is protruding to be provided with the location between the adjacent binding face, the permanent magnet includes the first face that pastes mutually with the binding face and the second face that carries on the back mutually with the first face, connect through connecting the face between first face and the second face, connect the face and the protruding or protruding conflict setting in location of joint, protruding and joint protruding height is less than 1/2 permanent magnet thickness setting in the location.

The beneficial effect who so sets up is: the arrangement is that the permanent magnet is positioned by being attached to the attaching surface, the loading surface is parallel to the attaching surface, the installation of the permanent magnet is convenient, the production and processing efficiency is effectively improved, meanwhile, the positioning bulges and the clamping bulges are arranged on the two sides of the attaching surface, the auxiliary positioning can be realized, the permanent magnet is prevented from being separated in the using process, the deflection displacement of the permanent magnet is also effectively prevented, the height of the further positioning bulge is less than the thickness of 1/2 permanent magnet, the short circuit of the magnetic force of the permanent magnet is effectively avoided, the driving force is effectively improved, the using effect of the whole structure is improved, meanwhile, the attaching surface, the positioning bulges or the clamping bulges and the contact surface of the permanent magnet have larger contact surface than the second surface of the permanent magnet, the suction force applied to the second surface of the permanent magnet is less than the sum of the suction forces applied to the first surface and the contact surface with the positioning bulges, and the possibility of loosening of the permanent magnet is reduced, meanwhile, the structure is simple, the stability is strong, and the whole structure is reliable to use.

As a further setting of the utility model, the binding face on the loading face sets up to two, the protruding width in location is greater than the protruding setting of joint.

The beneficial effect who so sets up is: set up like this for rotor core structure processing production of being convenient for more has better equilibrium simultaneously, improves overall structure's output effect, and the binding face total number here is four certainly, and the permanent magnet that corresponds is also four, guarantees that output effect and output are stable, sets the protruding width in location to be greater than the protruding width of joint simultaneously, makes the intermediate position have better intensity, further improves overall structure's stability.

As a further setting of the utility model, the second surface of the permanent magnet is in an arc shape.

The beneficial effect who so sets up is: set up like this, the increase permanent magnet improves overall structure's atress effect towards the lifting surface area of stator core one side, and simple structure does benefit to the realization simultaneously, improves output drive power.

As the utility model discloses a further setting, the permanent magnet is first face and correspond between the rotor core binding face, the permanent magnet is connected the face and is corresponded the location arch or the joint is protruding between all to bind through glue.

The beneficial effect who so sets up is: the fixing of the permanent magnet on the rotor core is further guaranteed by the arrangement, and meanwhile, the structure is simple, the realization is facilitated, and the using effect of the whole structure is effectively improved.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present invention.

Detailed Description

The embodiment of the rotor assembly of the oscillating motor for an electric toothbrush of the present invention is shown in fig. 1: comprises a rotor iron core 2, a permanent magnet 3 and a rotating shaft 1, wherein the rotor iron core 2 is sleeved on the rotating shaft 1 and is fixedly connected with the rotating shaft 1, two parallel loading surfaces are formed on the outer peripheral wall of the rotor core 2, clamping protrusions 22 are arranged on two sides of the loading surfaces of the rotor core 2, two binding surfaces 21 used for binding with the permanent magnet 3 are arranged on the loading surface, a positioning bulge 23 is arranged between the two binding surfaces 21, the width of the positioning bulge 23 is larger than that of the clamping bulge 22, the permanent magnet 3 comprises a first surface 31 attached to the attaching surface 21 and a second surface 32 opposite to the first surface 31, the first surface 31 and the second surface 32 are connected through a connecting surface 33, the connecting surface 33 is abutted against the clamping protrusion 22 or the positioning protrusion 23, the height of the positioning bulge 23 and the clamping bulge 22 is smaller than the thickness of the 1/2 permanent magnet 3. The beneficial effect who so sets up is: the arrangement is that the permanent magnet 3 is positioned by being attached to the attaching surface 21, the loading surfaces are parallel, the installation of the permanent magnet 3 is convenient, the production and processing efficiency is effectively improved, meanwhile, the positioning protrusions 23 and the clamping protrusions 22 are arranged on two sides of the attaching surface 21, the auxiliary positioning can be realized, the permanent magnet 3 is prevented from being separated in the using process, the deflection displacement of the permanent magnet 3 is also effectively prevented, the height of the further positioning protrusion 23 is smaller than the thickness of the 1/2 permanent magnet 3, the short circuit of the magnetic force of the permanent magnet 3 is effectively avoided, the driving force is effectively improved, the using effect of the whole structure is improved, meanwhile, the attaching surface 21, the positioning protrusions 23 or the clamping protrusions 22 and the contact surface of the permanent magnet 3 have larger contact surfaces compared with the second surface 32 of the permanent magnet 3, and the suction force received by the second surface 32 of the permanent magnet 3 is smaller than the sum of the suction force received by the first surface 31 and the contact surface of the positioning protrusions 23, the possibility of loosening the permanent magnet 3 is reduced, and meanwhile, the structure is simple, the stability is strong, and the whole structure is reliable to use.

As a further setting of the present invention, the second surface 32 of the permanent magnet 3 is arc-shaped. The beneficial effect who so sets up is: set up like this, increase permanent magnet 3 is towards the lifting surface area of stator core one side, improves overall structure's atress effect, and simple structure does benefit to the realization simultaneously, improves output drive power.

As the utility model discloses a further setting, all bind through glue between 3 first faces 31 of permanent magnet and the 2 binding face 21 of corresponding rotor core, 3 connection faces 33 of permanent magnet and correspond location arch 23 or the joint arch 22. The beneficial effect who so sets up is: the fixing of the permanent magnet 3 on the rotor core 2 is further ensured by the arrangement, and meanwhile, the structure is simple, the realization is facilitated, and the using effect of the whole structure is effectively improved.

The above examples are only one of the preferred embodiments of the present invention, and the general changes and substitutions within the technical scope of the present invention are all included in the protection scope of the present invention.

Claims

1. The utility model provides a rotor subassembly of oscillating motor for electric toothbrush, includes rotor core, permanent magnet and pivot, the rotor core cover establish in the pivot and with pivot fixed connection, its characterized in that: be formed with the loading face that two parallels on the rotor core periphery wall, rotor core is provided with the joint arch in loading face both sides, be provided with the binding face that a plurality of is used for with the laminating of permanent magnet on the loading face, it is protruding to be provided with the location between the adjacent binding face, the permanent magnet includes the first face that pastes mutually with the binding face and the second face that backs the mutually with first face, connect through connecting the face between first face and the second face, connect the protruding conflict setting of protruding or the location arch of face and joint, protruding and the joint of location highly is less than 1/2 permanent magnet thickness setting.

2. The swing motor rotor assembly for an electric toothbrush according to claim 1, wherein: the mounting face is provided with two binding faces, and the width of the positioning protrusion is larger than that of the clamping protrusion.

3. The swing motor rotor assembly for an electric toothbrush according to claim 1, wherein: the second surface of the permanent magnet is arranged in an arc shape.

4. The swing motor rotor assembly for an electric toothbrush according to claim 1, wherein: and the first surface of the permanent magnet is bonded with the bonding surface of the corresponding rotor core, and the connecting surface of the permanent magnet is bonded with the corresponding positioning bulge or clamping bulge through glue.