KR101535393B1 - BLDC motor with integrated housing and shaft - Google Patents

Abstract

The present invention relates to a BLDC motor integrated with a housing and a shaft. The present invention relates to a BLDC motor capable of preventing deformation due to welding and preventing bearing corrosion. It includes a shaft part which comprises a housing, a shaft, a first and a second shaft insulator, a bearing part which comprises a first and a second bearing, a stator part which comprises a stator, an insulator, a coil, and a terminal projector, and a support part which comprises a body, a PCB, a hall ic, and a lid. Thereby, the reliability of products can be improved without deformation in a manufacturing process. Time and cost are reduced by reducing the number of manufacturing processes. Also, the weight of a motor is reduced by removing the complicated structure of an existing invention. The generation of noise and allophone can be reduced by simplifying the products.

Description

BLDC motor with integral housing and shaft [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a BLDC motor in which a housing and a shaft are integrated, and relates to a BLDC motor capable of preventing deformation due to welding and preventing bearing electromotive force.

Generally, a BLDC motor is welded to an outer housing and an inner shaft, and a shaft insulator is coupled to the shaft, and an insulating washer is inserted at the upper and lower portions of the shaft ring to prevent electric shock.

However, there is a possibility that deformation may occur in the housing due to high heat at the time of welding, and it takes a long time to manufacture due to the necessity of confirming such deformation and repairing the deformation.

Korean Patent Publication No. 10-2012-0118756 (Oct. 29, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a BLDC motor capable of shortening manufacturing time and cost without deforming during manufacturing by connecting a housing and a shaft by caulking operation.

There is provided a bearing device comprising a housing, a shaft, a shaft portion composed of first and second shaft insulators, a snap ring coupled with the second shaft insulator, a bearing portion composed of first and second bearings, , A stator composed of an insulator, a coil, a thermal protection device, a body, a PCB, a Hall ic, and a lid.

In another aspect of the present invention, the housing and the shaft are coupled by a caulking operation, the magnets of the housing are composed of eight in total, and the wave springs are formed between the magnets, A spring is constituted, and a wave washer is constituted only at the upper end of the second bearing.

As described above, according to the present invention, since there is no variation in manufacture, the reliability of the product can be increased, and the manufacturing steps can be shortened, thereby saving time and cost. In addition, the present invention has the effect of eliminating the structural complexity from the existing invention and reducing the environment in which noises and joints can be caused due to the weight reduction of the motor and the simplification of the product.

1 is a representative view of a conventional BLDC motor.
2 is a front sectional view of a BLDC motor in which a housing and a shaft are integrated with each other according to the present invention.
3 is a plan sectional view of a BLDC motor in which a housing and a shaft are integrated with each other according to the present invention.

The present invention relates to a BLDC motor in which a housing and a shaft are integrated, comprising: a housing 10 formed on an outer surface of the housing 10 and including a magnet 11, a wave spring 12 and a flange 13; A shaft portion 20 constituted by a first shaft insulator 22 and a second shaft insulator 22 constituting the shaft 21 and a snap ring 24 engaged with the second shaft insulator 23, A bearing portion 30 composed of a first bearing 31 coupled to the first shaft insulator 22 and a second bearing 32 engaged with the second shaft insulator 23; A stator 41 formed in a round cylindrical shape between the shaft portion 20 and the magnet 11, an insulator 42 formed between the stator 41 and the shaft 21, (40) constituted by a coil (43) wound inside a coil (41) and a thermal protection device (44) attached to the lower end of the coil (43); A body 51 coupled to the stator 40 and the first and second bearings 31 and 32, a PCB 52 coupled to one side of the body 51, A magnetic field resistance element (HALL IC) 53 which is formed on the upper surface of the housing and a supporter 50 composed of a lid 54. The housing and the shaft are integrated with each other.

Hereinafter, components according to the present invention will be described with reference to the accompanying drawings.

FIGS. 2 and 3 are a front sectional view and a flat cross-sectional view of a BLDC motor in which a housing and a shaft are integrated with each other according to the present invention, wherein a housing 10 is formed on the outer surface and a magnet 11 is formed inside the housing 10. The eight magnets 11 are constituted by eight wave springs 12 between the respective magnets 11 to fix the magnets 11 in total. This results in cost savings and improved productivity and functionality over existing bond and housing fixtures.

A shaft 21 is coupled to the center of the housing 10 and the housing 10 and the shaft 21 are coupled by caulking. As a result, it is possible to prevent thermal deformation of the housing due to high temperature of welding, which is a problem of coupling between the housing and the shaft through the conventional welding, and it is possible to save manufacturing time and cost have.

A flange 13 is formed at the lower end of the housing 10 and the flange 13 is integrally formed with the housing 10. As a result, it is possible to prevent the housing from being thermally deformed due to the high temperature of the welding, which is a problem of the coupling between the housing and the flange through the conventional welding, and it is possible to save manufacturing time and cost have.

In addition, the first and second shaft insulators 22 and 23 are engaged with the first and second bearings 31 and 32. The upper end of the first bearing 31 is fixed to the first shaft insulator 22 and the lower end of the first bearing 31 is fixed by a groove 51a formed in the body 51. The upper end of the second bearing 32 is fixed to the wave washer 33, and the lower ends thereof are fixed by snap rings 24, respectively. Due to such a structure, the structure is simpler than that of using a plurality of conventional wave washers, the positioning of the bearings is accurately performed, the vibration of the shaft is suppressed, and the vibration due to axial vibration and the resonance are prevented.

A coil 43 is formed inside the stator 41 and a thermal protection device 44 is formed at the lower end of the coil so that the coils 43, And the lid 54 is formed at the lower end of the body 50 to prevent foreign matter such as dust from entering into the interior of the motor.

Although the present invention has been shown and described with respect to specific embodiments and applications thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone with knowledge will know easily.

10. Housing 11. Magnetic
12. Wave spring 13. Flange
20. Shaft part 21. Shaft
22. First shaft insulator 23. Second shaft insulator
24. Snap ring 30. Bearing part
31. First bearing 32. Second bearing
33. Wave washer 40. Fixed abutment
41. Stator 42. Insulator
43. Coil 44. Thermal protection device
50. Support 51. Body
51. Home 52. PCB
53. HALL IC 54. Lid

Claims (5)

In a BLDC motor in which a housing and a shaft are integrated,
A housing 10 formed on the outer surface and including a magnet 11 and a wave spring 12 and integrated with the flange 13;
A first shaft insulator 22 and a second shaft insulator 22 formed on the shaft 21 and a second shaft insulator 22 formed on the second shaft insulator 23. The shaft 21 is coupled to the housing 10 by caulking, A shaft portion 20 constituted by a snap ring 24 to be engaged,
A bearing unit 30 including a first bearing 31 coupled to the first shaft insulator 22 and a second bearing 32 coupled to the second shaft insulator 23;
A stator 41 formed in a round cylindrical shape between the shaft portion 20 and the magnet 11, an insulator 42 formed between the stator 41 and the shaft 21, A stator portion 40 constituted by a coil 43 wound inside the coil 43 and a thermal protection device 44 attached to the lower end of the coil 43;
A body 51 coupled to the stator 40 and the first and second bearings 31 and 32, a PCB 52 coupled to one side of the body 51, And a support portion (50) composed of a magnetic field resistance element (HALL IC) (53) and a lid (54). delete delete The method according to claim 1,
A total of eight magnets 11 of the housing 10 are formed and the wave springs 12 are formed between the magnets 11 so that a total of eight wave springs 12 are formed. Wherein the housing and the shaft are integrally formed. The method according to claim 1,
The upper end of the first bearing 31 is fixed to the first shaft insulator 22 and the lower end thereof is fixed by a groove 51a formed in the body 51. The upper end of the second bearing 32 is fixed to the wave washer 33), and the lower end thereof is fixed by a snap ring (24), respectively, and the shaft is integral with the BLDC motor.

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