CN219938065U

CN219938065U - Miniature vibration motor

Info

Publication number: CN219938065U
Application number: CN202320194411.3U
Authority: CN
Inventors: 向友刚
Original assignee: Foshan Teyafei Technology Co ltd
Current assignee: Foshan Teyafei Technology Co ltd
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-10-31
Anticipated expiration: 2033-02-09

Abstract

The utility model relates to the technical field of vibration motors, in particular to a miniature vibration motor, which comprises a motor shell, wherein a stator assembly and a rotor assembly are arranged in the motor shell, the rotor assembly comprises a rotor shaft and a first magnetic piece, the stator assembly comprises a second magnetic piece, and the second magnetic piece and the first magnetic piece are coaxially and magnetically matched; wherein: the first magnetic part is of a coil structure, and the second magnetic part is of a permanent magnet ring structure; or the first magnetic part is of a permanent magnet ring structure, and the second magnetic part is of a coil structure; the coil structure is positioned at the outer side of the permanent magnet ring structure, and the outer side of the coil structure is spaced from the inner wall of the motor shell; based on a brushless motor's structure application scheme, it is through making coil structure and the setting that motor housing inner wall did not form the contact, can avoid coil structure to lead to motor structure whole at the heat that the course of the work produced, reduces the condition of being heated of other structural component.

Description

Miniature vibration motor

Technical Field

The utility model relates to the technical field of vibration motors, in particular to a miniature vibration motor.

Background

In the application of the micro vibration motor in the prior art, in order to control the volume and ensure the stability of the structure, a compact structure is usually selected and applied, so that the internal structure of the micro vibration motor is tightly abutted, and the problem of difficult heat dissipation exists in the working process.

A miniature vibration motor as described in the prior art patent document CN209250397U, in which the stator assembly is directly mounted on the motor housing, so that the overall conduction heating condition of the motor during the working process is easily caused; if used for a long time, it will cause damage to the connection structure, some of which are slim.

The miniature vibrating motors in the prior art are all applied to brush motors, and the brush structure is easy to wear, so that the miniature vibrating motors have the technical defect of low service life and cannot meet the long-time working requirement.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a miniature vibration motor.

The miniature vibration motor comprises a motor shell, wherein a stator assembly and a rotor assembly are arranged in the motor shell, the rotor assembly comprises a rotor shaft and a first magnetic piece which is connected onto the rotor shaft in a penetrating way, the stator assembly comprises a second magnetic piece which is arranged in an annular way, and the second magnetic piece and the first magnetic piece are coaxially and magnetically matched; wherein: the first magnetic part is of a coil structure, and the second magnetic part is of a permanent magnet ring structure; or the first magnetic part is of a permanent magnet ring structure, and the second magnetic part is of a coil structure; the coil structure is located on the outer side of the permanent magnet ring structure, and a distance is reserved between the outer side of the coil structure and the inner wall of the motor shell.

By arranging the coil structure outside the permanent magnet ring structure, the coil structure and the permanent magnet ring structure perform relative rotation movement, so that the coil structure can meet the combined application requirement of the stator assembly and the rotor assembly. The coil structure on the outer side can generate heat in the working process, so that the outer side of the coil structure and the inner wall of the motor shell form a distance, the coil structure is not in contact with the inner wall of the motor shell, thereby effectively radiating, improving the energy efficiency of the coil, avoiding the heat generated in the working process from being led to the whole motor structure, causing the damage of the whole motor structure due to heat, and meeting the long-time working requirement of the miniature vibration motor.

Further, one end of the rotor shaft is rotatably connected to the motor housing, and the other end of the rotor shaft is connected to the eccentric assembly.

The eccentric assembly comprises an eccentric block, an eccentric hole is axially formed in the eccentric block, and the other end of the rotor shaft is connected to the eccentric hole in a penetrating manner; the eccentric block is radially provided with a mounting screw hole, and the mounting screw hole is screwed with a fixing screw; the application requirement of fixedly attaching the eccentric assembly to the rotor shaft is met by screwing the fixing screw in the radial direction of the eccentric block.

Further, the motor shell is internally divided into a first working cavity and a second working cavity, the other end of the rotor shaft is connected to the second working cavity in a penetrating way, and the eccentric assembly is arranged in the second working cavity; the stator assembly is disposed in the first working chamber. Based on the division of working chamber, can separate in stator module and rotor module effectively and send out heat at the working process of first working chamber, guarantee miniature vibrating motor's eccentric block structure application stability.

Further, the motor housing comprises a housing base body, a fixed cover is detachably arranged on the housing base body, and one end of the rotor shaft is rotatably connected to the fixed cover. The installation application requirement of the rotor assembly is met through the arrangement of the detachable fixed cover.

Further, the motor housing is provided with an extended attachment base block, and an attachment hole is provided through the attachment base block. Based on the arrangement of the mounting holes, the integral external assembly application requirement of the miniature vibration motor is met.

Further, the motor housing is integrally square, and the rotor shaft penetrates into the center of the motor housing along the left-right direction of the motor housing. The rear side of the motor housing is provided with a lead opening, the stator assembly is provided with an outgoing line in an extending mode, and the outgoing line extends out of the motor housing through the lead opening.

Further, the upper side edge of the motor shell is provided with a rounding angle.

The utility model has the beneficial effects that:

(1) This miniature vibrating motor structure provides a brushless motor's structure application scheme, and it is through making coil structure and motor housing inner wall not form the setting of contact, can avoid coil structure to lead to motor structure whole at the heat that the course of the work produced, reduces the condition of being heated of other structural component, helps improving motor structure's whole life.

(2) The miniature vibration motor structure is arranged, the mounting holes are arranged at the coaxial positions of the fixing plate and the fixing cover through pre-assembly processing, so that the rotor shaft can be arranged in a penetrating way along the axial center position of the motor shell, and the concentricity of the combination of the rotor assembly and the stator assembly is ensured.

Drawings

Fig. 1 is a schematic view showing an external structure of a micro vibration motor according to the present utility model;

fig. 2 is a schematic view showing the internal structure of a micro vibration motor according to embodiment 1 of the present utility model;

fig. 3 is a schematic view showing the internal structure of a micro vibration motor according to embodiment 2 of the present utility model;

reference numerals illustrate:

the motor housing 1, the housing base 101, the fixing cover 102, the first mounting hole 1021, the mounting cylinder 1022, the attachment base block 103, the attachment base 104, the fixing plate 11, the second mounting hole 110, the first working chamber 12, the second working chamber 13, the lead opening 14,

Stator assembly 2, rotor assembly 3, rotor shaft 31, coil structure 4, permanent magnet ring structure 5, eccentric assembly 6, eccentric block 61, eccentric hole 62, mounting screw 63, and set screw 64.

Detailed Description

In order to make the technical scheme, the purpose and the advantages of the utility model more clear, the utility model is further explained below with reference to the drawings and the embodiments.

As shown in fig. 1 and 3, the miniature vibration motor of the present utility model includes a motor housing 1, and a stator assembly 2 and a rotor assembly 3 are disposed in the motor housing 1.

Example 1:

the motor housing 1 comprises a housing base body 101 and a fixed cover 102 detachably arranged beside the housing base body 101, wherein a first mounting hole 1021 is formed in the central position of the fixed cover 102; the motor housing 1 is vertically provided with a fixing plate 11, a second mounting hole 110 is formed in the center of the fixing plate 11, and the first mounting hole 1021 and the second mounting hole 110 are coaxially and correspondingly formed.

Bearing assemblies are arranged on the first mounting hole 1021 and the second mounting hole 110, the rotor assembly 3 comprises a rotor shaft 31 which is connected to the first mounting hole 1021 and the second mounting hole 110 in a penetrating way, and the rotor shaft 31 can perform self-rotation motion relative to the motor shell 1 under the action of the bearing assemblies; the fixing plate 11 is configured to form a first working chamber 12 and a second working chamber 13 inside the motor housing 1, one end of the rotor shaft 31 is attached to the first mounting hole 1021, and the other end is connected to the second working chamber 13 in a penetrating manner.

In the application of the present embodiment, the coil structure 4 wound in a ring shape is used as a first magnetic member for the application of the rotor assembly 3, and the permanent magnet ring structure 5 is used as a second magnetic member for the application of the stator assembly 2.

Specifically, the fixing cover 102 extends toward the first working chamber 12 to form a mounting cylinder 1022, the inner side of the permanent magnetic ring structure 5 is cooperatively mounted on the mounting cylinder 1022, and the rotor shaft 31 extends to the second working chamber 13 through the inner side of the mounting cylinder 1022.

With a space between the distal end of the mounting cylinder 1022 and the fixed plate 11, the coil structure 4 is positioned and attached to a position section between the distal end of the mounting cylinder 1022 of the rotor shaft 31 and the fixed plate 11, the coil structure 4 extends in the radial direction based on the space between the distal end of the mounting cylinder 1022 and the fixed plate 11, and then the coil structure 4 is arranged in the first working chamber 12 with a space between the outer side of the coil structure 4 and the inner wall of the motor housing 1 in the axial direction; the permanent magnet ring structure 5 is arranged in the inner arrangement range of the periphery of the coil structure 4.

The other end of the rotor shaft 31 is connected with the eccentric component 6 at the position of the second working cavity 13; the eccentric assembly 6 comprises an eccentric block 61, an eccentric hole 62 is axially formed in the eccentric block 61, and the other end of the rotor shaft 31 is connected to the eccentric hole 62 in a penetrating manner; the eccentric block 61 is radially provided with a mounting screw hole 63, the mounting screw hole 63 is screwed with a fixing screw 64, and the rotor shaft 31 and the eccentric block 61 are locked and fixed by screwing the fixing screw 64.

In order to meet the installation requirement of the miniature vibration motor and improve the structural stability of the miniature vibration motor, the following is preferably arranged:

the motor shell 1 is integrally arranged in a tetragonal shape, and the bottoms of the motor shell are level; the front side of the bottom of the motor shell 1 horizontally extends to be provided with an attachment base block 103, the attachment base block 103 is vertically penetrated and provided with an attachment hole 104, and the vibration motor can more effectively meet the external installation application under the structural arrangement of the attachment hole 104 and the bottom flush.

The rotor shaft 31 penetrates into the motor housing 1 at the center position thereof in the left-right direction of the motor housing 1. The rear side of the motor housing 1 is provided with a lead opening 14, and the stator assembly 2 is provided with lead wires in an extending manner, and the lead wires extend out of the motor housing 1 through the lead opening 14. The upper side edge of the motor housing 1 is provided with a rounding arrangement.

Through reasonable layout, the miniature vibration motor can have the functions of installation, lead wiring and work driving, and the functions are distributed mutually and are not disturbed mutually.

Example 2:

the present embodiment differs from the above-described embodiments in that the coil structure 4 is provided for the application of the stator assembly 2 for the second magnetic element and the permanent magnet ring structure 5 is provided for the application of the rotor assembly 3 for the first magnetic element.

Specifically, the coil structure 4 is positioned and attached on the fixed plate 11 corresponding to one side of the first working cavity 12 as the stator assembly 2, and a space is reserved between the outer side of the coil structure 4 and the inner wall of the motor housing 1; the coil structure 4 is coaxially disposed with the second mounting hole 110.

The rotor shaft 31 is positioned and connected with the permanent magnet ring structure 5 in the first installation cavity, the rotor shaft 31 is connected with the inner side of the coil structure 4 in a penetrating way, and the permanent magnet ring structure 5 is arranged in the inner side arrangement range of the coil structure 4.

The foregoing is merely a preferred embodiment of the present utility model, and modifications of the embodiments described above can be made by those skilled in the art without departing from the implementation principles of the present utility model, and the corresponding modifications should also be considered as the protection scope of the present utility model.

Claims

1. The miniature vibration motor comprises a motor shell, wherein a stator assembly and a rotor assembly are arranged in the motor shell, and the miniature vibration motor is characterized in that the rotor assembly comprises a rotor shaft and a first magnetic piece which is connected onto the rotor shaft in a penetrating way, the stator assembly comprises a second magnetic piece which is arranged in an annular way, and the second magnetic piece and the first magnetic piece are coaxially and magnetically matched; wherein:

the first magnetic part is of a coil structure, and the second magnetic part is of a permanent magnet ring structure; or the first magnetic part is of a permanent magnet ring structure, and the second magnetic part is of a coil structure;

the coil structure is located on the outer side of the permanent magnet ring structure, and a distance is reserved between the outer side of the coil structure and the inner wall of the motor shell.

2. The miniature vibration motor of claim 1, wherein said rotor shaft is rotatably coupled to said motor housing at one end and to an eccentric assembly at the other end.

3. The miniature vibration motor of claim 2, wherein said eccentric assembly comprises an eccentric block having an eccentric aperture axially disposed thereon, said rotor shaft having another end coupled to said eccentric aperture; the eccentric block is radially provided with a mounting screw hole, and the mounting screw hole is provided with a fixing screw in a threaded connection manner.

4. The miniature vibration motor of claim 2, wherein the motor housing is internally divided into a first working chamber and a second working chamber, the other end of the rotor shaft is connected to the second working chamber in a penetrating way, and the eccentric assembly is arranged in the second working chamber; the stator assembly is disposed in the first working chamber.

5. The miniature vibration motor of claim 4, wherein a fixed plate is disposed in the motor housing for dividing the first working chamber and the second working chamber, a first mounting hole is disposed in the motor housing, a second mounting hole is disposed in the fixed plate, the first mounting hole and the second mounting hole are coaxially disposed, and the rotor shaft is connected to the first mounting hole and the second mounting hole in a penetrating manner.

6. The miniature vibration motor of claim 2, wherein said motor housing includes a housing base having a fixed cover removably attached thereto, said rotor shaft having one end rotatably connected to said fixed cover.

7. The miniature vibration motor of claim 1, wherein said motor housing extends with an attachment base block having an attachment aperture therethrough.

8. The miniature vibration motor according to any one of claims 1 to 7, wherein the motor housing is generally square-shaped, and the rotor shaft is penetrated in a center position of the motor housing in a right-left direction of the motor housing.

9. The miniature vibration motor of claim 8, wherein a lead opening is provided in a rear side of said motor housing, and wherein said stator assembly is provided with lead wires extending therefrom, said lead wires extending out of said motor housing through said lead opening.

10. The miniature vibration motor of claim 8, wherein said upper side edge of said motor housing has a rounded corner arrangement.