WO2009065323A1

WO2009065323A1 - A motor magnet fixing structure

Info

Publication number: WO2009065323A1
Application number: PCT/CN2008/072672
Authority: WO
Inventors: Gwo-Rong Lay
Original assignee: Gwo-Rong Lay
Priority date: 2007-11-09
Filing date: 2008-10-14
Publication date: 2009-05-28
Also published as: CN201118288Y

Abstract

A motor magnet fixing structure mainly includes a housing (50) configured with two magnet fixing portions (60) which are set at opposite positions. The two magnet fixing portions (60) have openings (601) that face the front or the rear end of the housing (50). The structure also includes a rotor (51) which is configured in the housing (50) and two magnets (52, 53). The two magnets (52, 53) provide magnetic force relative to the rotor (51), and are placed in the magnet fixing portions(60) through the openings(601).

Description

Motor magnet fixing structure

The utility model relates to a motor structure, and more specifically, to a motor magnet fixing structure. Background technique

It is known that the motor principle is that an external power source supplies current through the rotor wire to generate a magnetic field and rotates in interaction with the stator magnetic field. Therefore, the basic structure of the motor generally includes a casing, a rotor, and a magnet (stator). The basic structure of the motor is assembled by substantially locating one end of a magnet by using two positioning elements preset inside the outer casing, so that the two magnets are positioned at the relative positions of the inner wall of the outer casing, and at least one of the other ends of the two magnets is further disposed. The separating element is based on which the two magnets are completely fixed in the housing and then placed in the rotor. Since the magnet is placed on the inner wall of the outer casing, it can be called a built-in magnet, and the motor with the built-in magnet is faced with a large obstacle when assembling the rotor, because the magnet acts magnetically with the rotor, so that the rotor is It is easy to get off the axis and get stuck on the outer casing during the process of inserting the outer casing, so it is necessary to go through many failures in the assembly process to achieve the assembly of the axial alignment. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor magnet fixing structure for improving the above-described built-in magnet to hinder the assembly of the rotor and to facilitate assembly.

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

A motor magnet fixing structure, comprising:

An outer casing, the outer casing is provided with two magnet fixing portions at opposite positions, and the two magnet fixing portions have openings toward the front end or the rear end of the outer casing;

a rotor disposed in the outer casing;

A magnet for supplying a magnetic force to the rotor is provided in the two magnet fixing portions via the opening. The magnet fixing portion is a two-groove structure provided on an inner wall surface of the outer casing.

The magnet fixing portion is two semi-arc shaped receiving spaces provided on the outer surface of the outer casing.

Wherein a bundle is fixed to the end of the casing and closed at the opening of the magnet fixing portion.

The utility model has the beneficial effects that the magnet is disposed on the outer wall of the outer casing, so that it can be called an external magnet, and the motor with the external magnet structure can completely solve the problem of assembling the rotor in the prior art. Improve assembly efficiency.

For the convenience of the description, the central idea expressed in the column of the above novel content is expressed by a specific embodiment. The various objects in the embodiment and the amount of deformation or displacement thereof are in a ratio suitable for the illustrative description. For example, instead of drawing according to the proportion of actual components, it will be described first. DRAWINGS

Fig. 1 is a combined appearance view of the first embodiment of the present invention.

Figure 2 is an exploded perspective view of the first embodiment of the present invention.

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

Figure 4 is a rear perspective exploded view of the second embodiment of the present invention. detailed description

As shown in Fig. 1 and Fig. 2, the motor of the present invention mainly comprises a casing 50, a rotor 51, two magnets 52, 53, a bundle 54, a brush holder 55 and a tail cap 56. The outer casing 50 is provided with a pair of magnet fixing portions 60 at opposite positions for the purpose of accommodating the two magnets 52, 53. The magnet fixing portion 60 is provided with two semi-arc groove structures at opposite positions of the inner wall surface of the outer casing 50, the groove structure opening facing the rotor 51 and the front end of the outer casing 50. The rotor 51 is disposed in the outer casing 50, and then the two magnets 52, 53 are filled into the magnet fixing portion 60 from the opening 601 at the front end of the magnet fixing portion 60, and the bundle 54 is fixed to the front end of the outer casing 50 to close the magnet. The opening 601 at the front end of the portion 60 positions the two magnets 52, 53 in the magnet fixing portion 60. The two magnets 52, 53 and the rotor 51 are magnetically attracted and positioned, and the magnetic structure of the motor is completed.

As shown in FIG. 3 and FIG. 4, in the second embodiment of the present invention, the motor mainly comprises a casing 70, a rotor 71, two magnets 72, 73, a bundle 74, a brush holder 75 and a tail cover 76. The housing 70 is provided with a pair of magnet fixing portions 61 at opposite positions. The magnet fixing portion 61 is disposed on two outer semi-arc accommodating spaces of the outer casing 70, and the accommodating space opening faces the rear end of the outer casing 70. . The magnets 72, 73 are filled in the magnet fixing portion 61 by the opening 611 at the rear end of the magnet fixing portion 61, and the beam 74 is fixed to the rear end of the outer casing 70, and the opening 611 at the rear end of the magnet fixing portion 61 is closed, and the two are positioned. Magnets 72, 73 are in the magnet fixing portion 60.

The outer casing may be made of metal, plastic or aluminum extruded.

While the invention has been described in terms of a preferred embodiment, various modifications of the various embodiments can be made without departing from the spirit and scope of the invention. The above embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Any modification or change made without departing from the spirit of the utility model belongs to the patent application scope of the present invention.

Claims

Claim

A motor magnet fixing structure, comprising:

a casing (50), the casing (50) is provided with two magnet fixing portions (60) at opposite positions, and the two magnet fixing portions (60) have openings (601) facing the front end or the rear end of the casing;

a rotor (51) disposed in the outer casing (50);

Second, a magnet (52, 53) for supplying a magnetic force to the rotor (51) is provided in the two magnet fixing portions (60) via the opening (601).

The motor magnet fixing structure according to claim 1, wherein the magnet fixing portion (60) is a two-groove structure provided on an inner wall surface of the outer casing.

The motor magnet fixing structure according to claim 1, wherein the magnet fixing portion (60) is two semi-arc-shaped accommodating spaces provided on an outer surface of the outer casing (50).

The motor magnet fixing structure according to claim 2 or 3, characterized in that a bundle (54) is fixed to the end of the casing (50) and closed at the opening (601) of the magnet fixing portion (60).

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