CN111697715A

CN111697715A - Small-sized motor

Info

Publication number: CN111697715A
Application number: CN202010489434.8A
Authority: CN
Inventors: 陈寅; 张雪峰
Original assignee: Ningbo Dingxiang Electrical Appliance Manufacturing Co ltd
Current assignee: Ningbo Dingxiang Electrical Appliance Manufacturing Co ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-09-22

Abstract

The application discloses small-size motor, wherein small-size motor includes a stator module and a rotor of moulding plastics and forming, wherein the stator module of moulding plastics and forming includes a stator component and a portion of moulding plastics, wherein the portion of moulding plastics set up with stator component an organic whole injection moulding, and the portion of moulding plastics forms an inner wall, wherein a column through-hole is defined to the inner wall, wherein the rotor set up in with the coaxial mode of column through-hole axial in the portion of moulding plastics.

Description

Small-sized motor

Technical Field

The invention relates to the field of motors, in particular to a small motor.

Background

Small motors are widely used in various electronic products. Most of the light generated by the existing stage lamps is generated by cutting a light imaging device. The cutting light imaging device drives the light blocking sheets on the cutting light imaging device through the small motor, so that the plurality of light blocking sheets form light through holes with preset sizes and shapes, and light spots with different sizes and different shapes are formed.

Stage lamps are used for stage performances. The performance effect of the performers displayed to the audience in the performance is easily affected by the external noise. When the light blocking sheet in the stage lamp is driven by the motor to slide, the friction between the rotor and the stator in the motor inevitably generates larger noise. The noise is mainly generated because a certain assembly angle exists between the axial direction of the rotor and the axial direction of the stator, so that the axial direction of the rotor and the axial direction of the stator are different lines. Secondly, the smoothness of the inner wall of the stator assembly contacting with the outer wall of the rotor is not enough, so that the friction force between the rotor and the inner wall of the stator in the rotating process is increased, and the noise is increased.

And the inner wall formed by the stator assembly is rough, so that the assembly power of the whole motor in the subsequent rotor is lower, and the yield of the motor is influenced.

Disclosure of Invention

It is an object of the present invention to provide a miniature electric machine, wherein the miniature electric machine comprises an injection molded stator assembly, wherein the injection molded stator assembly comprises an injection molded part, wherein the injection molded part forms an annular inner wall. The axis of the annular inner wall is disposed coaxially with the rotor.

Another object of the present invention is to provide a small-sized motor in which the injection-molded stator assembly has a stable structure and generates less noise during operation.

To achieve at least one of the above objects of the present invention, the present invention provides a small-sized motor, wherein the small-sized motor includes:

an injection molded stator assembly, wherein the injection molded stator assembly comprises a stator component and an injection molded part, wherein the injection molded part is configured to be injection molded integrally with the stator component, and the injection molded part forms an inner wall, wherein the inner wall defines a cylindrical through hole; and

a rotor, wherein the rotor is disposed on the injection molding part in an axial coaxial manner with the cylindrical through hole.

According to an embodiment of the present invention, the stator member includes a bobbin and at least one set of windings, and the windings are wound around the bobbin in a predetermined manner, so that the rotor built in the cylindrical through hole formed in the stator assembly can be driven to rotate after the windings are energized.

According to an embodiment of the present invention, the bobbin includes a first bobbin and a second bobbin, the first bobbin is fixed to the second bobbin, and when the first bobbin is fixed to the second bobbin, a plurality of winding windows are formed between the first bobbin and the second bobbin, through which the winding passes in a predetermined manner.

According to an embodiment of the present invention, the winding forms a conductive end, wherein the conductive end extends from the injection molded part after the bobbin and the winding are integrally molded with the injection molded part.

According to an embodiment of the present invention, the winding bobbin forms at least one slot for locking the winding wire near the conductive end.

According to an embodiment of the present invention, the stator member includes a bobbin holder, the bobbin is integrally formed with the injection molded part together with the winding after the winding is wound, and the bobbin holder is mounted to the bobbin holder after the bobbin is integrally formed with the injection molded part together with the winding.

According to an embodiment of the present invention, the injection molded stator assembly includes a mounting cover, wherein the mounting cover is fixed to the frame fixing member, and the mounting cover is provided with at least two mounting holes for fixing bolts to pass through to relatively fix the mounting cover.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, which is to be read in connection with the accompanying drawings.

Drawings

Fig. 1 shows a perspective view of a small-sized motor of the present invention.

Fig. 2 shows an exploded view of the small-sized motor of the present invention.

Fig. 3 shows a perspective view of an injection molded part of the small-sized motor of the present invention.

Detailed Description

The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

A small-sized motor according to a preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings 1 to 3. The small motor can be used for driving the light blocking sheet on the cutting light imaging device, and the noise generated in the operation process of the small motor is small.

Specifically, the small-sized motor includes an injection molded stator assembly 10 and a rotor 20.

The injection molded stator assembly 10 includes a stator member 11 and an injection molded part 12. The injection part 12 is provided to be injection-molded integrally with the stator member 11. The stator assembly 10 is molded to form an inner wall 121 from the injection molding part 12, wherein the inner wall 121 defines a cylindrical through hole 12101.

The rotor 20 is built in the cylindrical through hole 12101, and the rotation axis of the rotor 20 is disposed coaxially with the cylindrical through hole 12101. It will be appreciated that the inner wall 121 is formed by the injection molded part 12. During the injection molding process, the smoothness of the inner wall 121 and the regularity of the cylinder of the cylindrical through holes 12101 formed by the inner wall 121 can be ensured by the mold. Therefore, after the rotor 20 is mounted to the cylindrical through hole 12101, the frictional force between the rotor 20 and the stator assembly 10 is reduced, so that noise generated from the entire small-sized motor can be reduced.

More importantly, since the regularity of the cylindrical through holes 12101 can be ensured, in the subsequent assembly process of the rotor 20, the size of the included angle between the rotation axis of the rotor 20 and the axial direction of the cylindrical through holes 12101 caused by the irregularity of the stator assembly 10 itself can be reduced, and further, the rotation axis of the rotor 20 and the axial direction of the cylindrical through holes 12101 can be ensured to be coaxial, thereby improving the yield of the assembly of the small-sized motor.

The stator member 11 includes a bobbin 111 and at least one set of windings 112. The winding wire 112 is wound around the bobbin 111 in a predetermined manner so that the rotor 20, which is inserted into the cylindrical through hole 12101 formed in the stator assembly 10, can be driven to rotate after the winding wire 113 is energized.

After the winding wire 112 is wound around the bobbin 111, the winding wire 112 is wrapped by injection molding. At the same time, the winding wire 112 is fixed to the bobbin 111. Thereby, the winding wire 112 can be more stably fixed to the bobbin 111.

Preferably, the bobbin 111 includes a first bobbin 1111 and a second bobbin 1112. The first skeleton 1111 is fixed to the second skeleton 1112. When the first bobbin 1111 is fixed to the second bobbin 1112, a plurality of winding windows 111201 are formed between the first bobbin 1111 and the second bobbin 1112, through which the winding wire 112 passes in a predetermined manner.

Each of the winding wires 112 forms a conductive terminal 11201, wherein the conductive terminal 11201 extends from the injection part 12 for external power after the bobbin 111 and the winding wire 112 are integrally formed with the injection part 12.

Preferably, the winding bobbin 111 forms at least one slot 1113 for locking the winding 112 near the conductive end 11201. After the bobbin 111 is integrally molded with the injection molding part 12, the winding 112 near the conductive terminal 11201 is fixed, so that the winding 112 is not shifted during the injection molding process, thereby ensuring the stability of the extending direction of the conductive terminal 11201.

The stator member 11 further includes a frame fixing member 113. After the bobbin 111 is wound, the bobbin 111 is integrally formed with the injection molded part 12 together with the winding wire 112, and after the bobbin 111 is integrally formed with the injection molded part 12 together with the winding wire 112, the bobbin is mounted on the bobbin holder 113. Subsequently, the rotor 20 is rotatably mounted in the cylindrical through hole 12101.

Preferably, after the winding wire 112 is wound around the bobbin 111, the bobbin 111 is fixed to the bobbin fixing member 113. Subsequently, the winding wire 112, the winding bobbin 111, and the bobbin fixing member 113 are integrally injection-molded with the injection-molded part 12, and after the injection molding, the injection-molded part 12 wraps the inner side of the winding bobbin 111 and the inner side of the bobbin fixing member 113 to form the cylindrical through hole 12101.

It can be understood that, during the injection molding process, the regularity and the flatness of the surface of the cylindrical structure of the injection molding machine corresponding to the portion where the cylindrical through hole 12101 is formed need only be correspondingly ensured, and the regularity of the cylindrical through hole 12101 can be further ensured. The injection molded stator assembly 10 formed in this manner greatly increases the success rate of subsequent assembly of the rotor 20.

The injection molded stator assembly 10 further includes a mounting cap 30, wherein the mounting cap 30 is secured to the skeletal fixture 113. The mounting cover 30 is provided with at least two mounting holes 301 for fixing bolts to pass through to relatively fix the mounting cover 30.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A miniature motor, wherein said miniature motor comprises:

2. The small-sized motor according to claim 1, wherein the stator member includes a bobbin and at least one set of windings wound around the bobbin in a predetermined manner such that the rotor built in the cylindrical through-hole formed in the stator assembly can be driven to rotate after the windings are energized.

3. The small-sized motor as claimed in claim 2, wherein the bobbin includes a first bobbin and a second bobbin, the first bobbin being fixed to the second bobbin, and a plurality of winding windows are formed between the first bobbin and the second bobbin when the first bobbin is fixed to the second bobbin, for the winding wire to pass through in a predetermined manner.

4. The small-sized motor as claimed in claim 3, wherein the winding wire forms a conductive terminal, wherein the conductive terminal protrudes from the injection molded part after the bobbin and the winding wire are integrally molded with the injection molded part.

5. The miniature motor of claim 4, wherein said bobbin defines at least one slot for retaining said windings adjacent said conductive ends.

6. The small-sized motor according to claim 5, wherein the stator member includes a bobbin holder, the bobbin is integrally formed with the injection molded part together with the winding after the winding is wound, and is mounted to the bobbin holder after the bobbin is integrally formed with the injection molded part together with the winding.

7. The small-sized motor according to any one of claims 1 to 6, wherein the injection-molded stator assembly includes a mounting cover, wherein the mounting cover is fixed to the bobbin holder, and the mounting cover is provided with at least two mounting holes for fixing bolts to relatively fix the mounting cover.