CN201118288Y - Motor magnet fixing structure - Google Patents

Abstract

A motor magnet fixing structure mainly comprises: a shell, two magnet fixing parts are arranged at opposite positions of the shell, and the two magnet fixing parts are provided with openings facing to the front end or the rear end of the shell; a rotor disposed in the housing; two magnets, which are disposed in the two magnet fixing portions through the openings and provide magnetic force to the rotor. Therefore, the assembly is convenient, and the assembly efficiency is improved.

Description

Motor magnet fixing structure

technical field

The utility model is related to the structure of the motor, more specifically, it is the fixing structure of the motor magnet.

Background technique

It is known that the principle of the motor is that an external power supply provides current through the rotor wires to generate a magnetic field and interact with the stator magnetic field to rotate. Therefore, the basic structure of the motor generally includes a casing, a rotor, and a magnet (stator). The assembly method of the basic structure of the motor is roughly to use the two positioning elements preset inside the housing to respectively position one end of a magnet, so that the two magnets are positioned at the relative positions of the inner wall of the housing, and at least one magnet is arranged between the other ends of the two magnets. The separating element is used to completely fix the two magnets in the casing, and then put into the rotor. Because the magnet system is set on the inner wall of the casing, it can be called a built-in magnet. The motor with a built-in magnet structure faces a relatively large obstacle when assembling the rotor, because the magnet and the rotor interact magnetically so that the rotor It is easy to deviate from the axis and get stuck on the shell during the process of inserting into the shell. Therefore, many failures must be experienced during the assembly process to achieve an axis-aligned assembly.

Contents of the invention

The purpose of the utility model is to provide a motor magnet fixing structure to improve the above-mentioned problem that the built-in magnet hinders the assembly of the rotor and make the assembly more convenient.

According to the above purpose, a motor magnet fixing structure,

A motor magnet fixing structure, characterized in that it comprises:

A housing, the housing is provided with two magnet fixing parts at opposite positions, and the two magnet fixing parts have openings towards the front end or rear end of the housing;

a rotor disposed in the housing;

Two magnets that provide magnetic force relative to the rotor are arranged in the two magnet fixing parts through the above-mentioned opening.

Wherein, the magnet fixing part is a two-groove structure arranged on the inner wall of the shell.

Wherein, the magnet fixing part is two semi-arc accommodation spaces arranged on the outer surface of the casing.

Wherein, a beam is fixed at the end of the shell and closed at the opening of the magnet fixing part.

Beneficial effects of the utility model: the utility model can be called an external magnet because the magnet is arranged on the outer wall of the casing, and the motor with the external magnet structure can completely solve the problem of difficulty in assembling the rotor in the prior art. Assembly efficiency is improved.

In order to illustrate the central idea of the utility model in the column of the above-mentioned new content, it is expressed in specific embodiments. Various objects and their deformations or displacements in the embodiments are drawn in proportions suitable for illustration rather than in proportion to actual components, and are described first.

Description of drawings

Fig. 1 is an assembled appearance diagram of the first embodiment of the present utility model.

Fig. 2 is a three-dimensional exploded view of the first embodiment of the present invention.

Fig. 3 is a combined appearance diagram of the rear view of the second embodiment of the present invention.

Fig. 4 is a rear perspective exploded view of the second embodiment of the present invention.

Detailed ways

As shown in Fig. 1 and Fig. 2, the utility model motor mainly includes a casing 50, a rotor 51, two magnets 52, 53, a beam 54, a brush holder 55 and a tail cover 56. The casing 50 is provided with a pair of magnet fixing parts 60 at opposite positions, the main function of which is to accommodate the above two magnets 52 , 53 . The magnet fixing part 60 is provided on two semi-arc groove structures on opposite positions on the inner wall of the housing 50 , and the groove structures open toward the rotor 51 and the front end of the housing 50 . The rotor 51 is arranged in the housing 50, and then the two magnets 52, 53 are filled into the magnet fixing part 60 from the opening 601 at the front end of the magnet fixing part 60, the beam 54 is fixed on the front end of the housing 50, and the magnet fixing is closed. The opening 601 at the front end of the part 60 positions the two magnets 52, 53 in the magnet fixing part 60, the two magnets 52, 53 and the rotor 51 produce magnetic attraction and are attracted and positioned, and the magnetic structure of the motor is completed.

As shown in Fig. 3 and Fig. 4, it is the second embodiment of the present utility model. The motor mainly includes a casing 70, a rotor 71, two magnets 72, 73, a beam 74, a brush holder 75 and a tail cover 76. The casing 70 is provided with a pair of magnet fixing parts 61 at opposite positions, and the magnet fixing parts 61 are arranged on two semi-arc-shaped accommodation spaces on the outer surface of the casing 70, and the openings of the accommodating spaces face the rear end of the casing 70 . Magnet 72,73 is filled in this magnet fixing part 61 by the opening 611 of this magnet fixing part 61 rear end, beam 74 is fixed on the rear end of this shell 70, closes the opening 611 of this magnet fixing part 61 rear end, locates the two The magnets 72 , 73 are in the magnet fixing part 60 .

The above shell can be made of metal, plastic or aluminum extrusion.

Although the utility model is illustrated with a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the utility model. The above-mentioned embodiments are only used to illustrate the utility model, and are not intended to limit the scope of the utility model. All modifications or changes that do not violate the spirit of the utility model belong to the patent scope of the utility model.

Claims (4)

1. A motor magnet fixing structure, characterized in that, comprising: A housing (50), the housing (50) is provided with two magnet fixing parts (60) at opposite positions, and the two magnet fixing parts (60) have an opening (601) towards the front or rear end of the housing; a rotor (51), located in the casing (50); Two magnets (52, 53) providing magnetic force relative to the rotor (51) are arranged in the two magnet fixing parts (60) through the above-mentioned opening (601). 2. The motor magnet fixing structure according to claim 1, characterized in that, the magnet fixing part (60) is a structure of two grooves arranged on the inner wall of the housing. 3. The motor magnet fixing structure according to claim 1, characterized in that, the magnet fixing part (60) is two semi-arc accommodation spaces provided on the outer surface of the casing (50). 4. The motor magnet fixing structure according to claim 2 or 3, characterized in that a beam (54) is fixed at the end of the housing (50) and closed at the opening (601) of the magnet fixing part (60).

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