CN211351847U

CN211351847U - Fixing structure of permanent magnet and magnetic yoke of motor

Info

Publication number: CN211351847U
Application number: CN202020290560.6U
Authority: CN
Inventors: 魏建平
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-11
Filing date: 2020-03-11
Publication date: 2020-08-25
Anticipated expiration: 2030-03-11

Abstract

The utility model discloses a permanent magnet of motor and fixed knot of yoke constructs, including permanent magnet, yoke and holder, the holder is formed with a plurality of fixed slots to inner peripheral surface fretwork by the outer peripheral surface, and the equidistance interval sets up between the fixed slot, and each fixed slot is fixed with one in the yoke is arranged in to permanent magnet, holder, and holder and yoke fixed connection. The utility model relates to a rationally, the permanent magnet passes through the holder fixedly, and the fixed slot restriction permanent magnet is at the ascending removal of holder radial direction, and the removal of clamp plate restriction permanent magnet in holder axial direction, hem have certain elasticity, can press from both sides tight permanent magnet, prevent that the permanent magnet from breaking away from the fixed slot, holder and yoke screw connection, the permanent magnet is fixed on the yoke with mechanical structure like this, is difficult for coming off because of the human factor, ensures motor safety in utilization.

Description

Fixing structure of permanent magnet and magnetic yoke of motor

Technical Field

The utility model relates to the technical field of electric machines, specifically relate to a fixed knot of permanent magnet and yoke of motor constructs.

Background

At present, a tractor is almost adopted in an elevator host in the elevator industry, the tractor adopts a permanent magnet synchronous motor, the permanent magnet synchronous motor is made of rare earth materials into a permanent magnet, and the efficiency of the motor is much higher than that of other types of motors by combining a variable frequency speed regulation technology. However, the permanent magnet synchronous motor still has the following defects: the permanent magnet is adhered to the magnet yoke by adopting anaerobic structural adhesive, the used glue comprises two components, the two components need to be stirred on site and are glued and adhered after being fully mixed, the mixing process of the two components of the glue is changed along with the change of humidity and temperature, the stirring time and the reaction time are different, and adjustment is needed, so that the control on the site process is complex, and in addition, various human factors such as different technical proficiency of workers, different responsibility and the like are adopted, the glue is not fully reflected, the problem of magnet degumming is caused to occur occasionally, the permanent magnet of the motor is unstably fixed and falls off, the motor is seriously heated, burned and scrapped, and the use safety of the elevator is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a permanent magnet of the difficult motor that drops of permanent magnet and the fixed knot of yoke constructs.

The purpose of the utility model is realized like this.

The utility model provides a fixed knot of permanent magnet and yoke of motor constructs, includes permanent magnet and yoke, still includes the holder, and the holder is formed with a plurality of fixed slots by the outer peripheral surface to inner peripheral surface fretwork, and the equidistance interval sets up between the fixed slot, and each fixed slot is fixed with one the permanent magnet, the holder is arranged in the yoke, and holder and yoke fixed connection.

The technical scheme can be further perfected as follows.

More specifically, the retainer comprises two circular rings and a plurality of cross beams, the cross beams are annularly and uniformly arranged between the two circular rings at intervals, two ends of any cross beam are fixedly connected with one circular ring respectively, and a gap between every two adjacent cross beams forms the fixing groove.

More specifically, the two sides of each cross beam are respectively bent with a folded edge, and the folded edges of the adjacent cross beams are bent inwards to enable the fixed groove to be dovetail-shaped, and the permanent magnets are matched with the fixed groove in shape.

More specifically, the pressing plates are arranged in the folded edges on the two sides of each cross beam and are I-shaped, and the protruding parts on the two sides of each pressing plate are respectively abutted against the end faces of the adjacent permanent magnets.

More specifically, the pressure plate, the cross beam and the magnetic yoke are fixedly connected through screws.

In another more specific scheme, the beam is in an inverted T shape, so that the fixing groove is in a T shape, and the permanent magnet is matched with the fixing groove in shape.

The utility model relates to a rationally, the permanent magnet passes through the holder fixedly, and the fixed slot restriction permanent magnet is at the ascending removal of holder radial direction, and the removal of clamp plate restriction permanent magnet in holder axial direction, hem have certain elasticity, can press from both sides tight permanent magnet, prevent that the permanent magnet from breaking away from the fixed slot, holder and yoke screw connection, the permanent magnet is fixed on the yoke with mechanical structure like this, is difficult for coming off because of the human factor, ensures motor safety in utilization.

Drawings

Fig. 1 is a perspective view of the first embodiment.

Fig. 2 is an exploded schematic view of the first embodiment.

Fig. 3 is a schematic radial cross-sectional structure diagram of the first embodiment.

Fig. 4 is a schematic axial sectional structure diagram of the first embodiment.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

first embodiment, referring to fig. 1 to 4, a fixing structure of a permanent magnet and a yoke of a motor includes a permanent magnet 3, a yoke 1, and a holder 2. The holder 2 is the ring type, and the holder 2 includes two rings 21 and a plurality of crossbeam 22, and the even interval setting of a plurality of crossbeam 22 annular is between two rings 21, and arbitrary crossbeam 22 both ends respectively with a ring 21 fixed connection, the space between the adjacent crossbeam 22 constitutes fixed slot 20, the interval setting between the fixed slot 20, each fixed slot 20 is fixed with one permanent magnet 3, in yoke 1 was arranged in to holder 2, and holder 2 and yoke 1 fixed connection.

The two sides of each cross beam 22 are respectively bent to form folded edges 23, the folded edges 23 of the adjacent cross beams 22 are bent inwards to enable the fixing groove 20 to be in a dovetail shape, the permanent magnet 3 is matched with the fixing groove 20 in shape, and the dovetail-shaped fixing groove 20 ensures that the permanent magnet 3 cannot fall off into the retainer 2. And pressing plates 4 are arranged in the folded edges 23 at the two sides of each cross beam 22, the pressing plates 4 are I-shaped, and the protruding parts at the two sides of each pressing plate 4 are respectively abutted against the end surfaces of the adjacent permanent magnets 3. The pressure plate 4, the cross beam 22 and the magnetic yoke 1 are fixedly connected through screws.

In the present embodiment, the ring 21, the cross member 22 and the folded edge 23 are integrally formed, that is, the holder 2 is formed by press-molding a ring 21. When the permanent magnet bearing device is installed, the permanent magnets 3 are firstly placed into the fixing grooves 20 of the retainer 2 one by one, the permanent magnets 3 are clamped with the folded edges 23, the pressing plate 4, the cross beams 22 and the magnet yoke 1 are respectively provided with screw holes, the retainer 2 and the permanent magnets 3 are installed into the magnet yoke 1, the pressing plate 4 is placed into the two folded edges 23 of each cross beam 22, and then the pressing plate 4, the cross beams 22 and the magnet yoke 1 are connected and fixed together by using screws. In addition, in order to improve the connection strength between the permanent magnet 3 and the yoke 1, an adhesive layer may be provided between the holder 2, the yoke 1, and the permanent magnet 3, so that the permanent magnet 3 is less likely to be separated from the yoke 1.

The second embodiment is different from the first embodiment in that: the retainer 2 is a ring 21 type, the retainer 2 is formed by hollowing out a plurality of fixing grooves 20 which are arranged at equal intervals from the outer peripheral surface to the inner peripheral surface, and the fixing grooves 20 are T-shaped. That is, the beam 22 is inverted T-shaped, the permanent magnet 3 is fitted to the fixing groove 20, the permanent magnet 3 is fitted into the fixing groove 20 from the outer circumferential surface of the holder 2, and the holder 2 is screwed to the yoke 1 to prevent the permanent magnet 3 from being separated from the outer circumferential surface of the holder 2.

Claims

1. The utility model provides a fixed knot of permanent magnet and yoke of motor constructs, includes permanent magnet and yoke, its characterized in that: the permanent magnet permanent.

2. The fixing structure of the permanent magnet and the yoke of the motor according to claim 1, wherein: the retainer comprises two circular rings and a plurality of cross beams, the cross beams are evenly arranged between the two circular rings at intervals in an annular mode, two ends of any cross beam are fixedly connected with the circular rings respectively, and a gap between every two adjacent cross beams forms the fixing groove.

3. The fixing structure of the permanent magnet and the yoke of the motor according to claim 2, wherein: the two sides of each cross beam are respectively bent with a folded edge, the folded edges of the adjacent cross beams are bent inwards, so that the fixed groove is in a dovetail shape, and the permanent magnet is matched with the fixed groove in shape.

4. The fixing structure of the permanent magnet and the yoke of the motor according to claim 3, wherein: and pressing plates are arranged in the folded edges at the two sides of each cross beam and are I-shaped, and the protruding parts at the two sides of each pressing plate are respectively abutted against the end faces of the adjacent permanent magnets.

5. The fixing structure of the permanent magnet and the yoke of the motor according to claim 4, wherein: the pressing plate, the cross beam and the magnetic yoke are fixedly connected through screws.

6. The fixing structure of the permanent magnet and the yoke of the motor according to claim 2, wherein: the beam is in an inverted T shape, so that the fixing groove is in a T shape, and the permanent magnet is matched with the fixing groove in shape.