CN218526168U - Motor for hair drier - Google Patents

Abstract

The utility model relates to the technical field of electric motor, a motor for hair-dryer is disclosed, including the casing and in the inside rotor subassembly that sets up of casing, the rotor subassembly includes the rotor shaft and in the concentric bearing that sets up of rotor shaft, be provided with the bearing frame on the casing, when bearing frame and bearing interference fit, the rotor subassembly is installed in the casing, when the rotor subassembly is installed in the casing, be provided with the locking structure of restriction rotor subassembly along the axial float of rotor shaft between bearing frame and the rotor subassembly, this a motor for hair-dryer, through the float of avoiding the rotor subassembly, stability when improving the motor and using.

Description

Motor for hair drier

Technical Field

The utility model relates to the technical field of motors, specifically be a motor for hair-dryer.

Background

The motor generally comprises casing, rotor subassembly and stator module, and rotor subassembly and stator module are installed inside the casing.

Chinese patent application No. CN201880066229.1 discloses an electric machine comprising a frame, a stator assembly and a rotor assembly mounted in the frame, the rotor assembly comprising a shaft and at least one bearing mounted on the shaft, a permanent magnet being fixed to the shaft, the frame further comprising a bearing housing to which the bearings of the rotor assembly are mounted, and wherein the bearing housing extends axially beyond the bearings.

This motor is through being fixed in the frame with stator module in, insert the rotor subassembly again and make the bearing install on the bearing frame in the frame, realize the installation of rotor subassembly, but the connection between common bearing and the bearing frame is realized fixedly through the outer rampart of bearing and the inner ring wall interference laminating of bearing frame, in the motor use, under the influence of multifactor (for example, the axial float that the motor stator and rotor magnetic force central line self-alignment adjusted to lead to, the axial float that the axial force that produces when the fan is rotatory leads to), the axial float of rotor subassembly can be followed the axle, lead to the stability of motor to reduce.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor for hair-dryer avoids the drunkenness of rotor subassembly, stability when improving the motor and using.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve: the utility model provides a motor for hair-dryer, includes the casing and in the inside rotor subassembly that sets up of casing, the rotor subassembly includes rotor shaft and the bearing that sets up with one heart in the rotor shaft, is provided with the bearing frame on the casing, when bearing frame and bearing interference fit, the rotor subassembly is installed in the casing, when the rotor subassembly is installed in the casing, is provided with the locking structure of restriction rotor subassembly along the axial float of rotor shaft between bearing frame and the rotor subassembly.

Adopt above-mentioned scheme, it is fixed to compare the outer rampart of bearing and the realization of the inner ring wall interference laminating of bearing frame in prior art, under the influence of multifactor (for example, the axial float that leads to is adjusted well from adjusting well to the motor stator and rotor magnetic force central line, the axial float that the axial force that produces when the fan is rotatory leads to), the rotor subassembly can be followed the axial float of axle, lead to the stability of motor to reduce, through addding locking structure in this scheme, in the rotor subassembly inserts the casing, the assembly back that targets in place, locking structure takes effect, the axial float of rotor unit edge rotor shaft is restricted, stability when improving the motor and using.

Preferably, the locking structure includes a support portion provided on the bearing seat and adapted to be engaged with the lower bottom surface of the bearing when the rotor assembly is mounted in the housing, and a stopper portion provided on the bearing seat and adapted to restrict the bearing from being disengaged from the support portion when the lower bottom surface of the bearing is engaged with the support portion.

Adopt above-mentioned scheme, in the rotor subassembly inserts the casing, the assembly back that targets in place, bottom surface and supporting part laminating under the bearing, restriction rotor subassembly continues to insert in the casing, breaks away from the supporting part through spacing portion restriction bearing this moment, under the common centre gripping of supporting part and spacing portion, restricts the axial float of bearing along the rotor shaft to the axial float of whole rotor subassembly along the rotor shaft is restricted.

Preferably, the support part includes a projection protruding inward on the inner wall of the bearing seat, and when the rotor assembly is installed in the housing, the lower bottom surface of the bearing is attached to the upper top surface of the projection.

By adopting the scheme, the convex blocks are arranged, the lower bottom surface of the bearing is attached to the upper top surfaces of the convex blocks in the process that the rotor assembly is inserted into the shell, and therefore the rotor assembly is limited from being continuously inserted into the shell.

Preferably, the projection is arranged in a ring shape through which the rotor shaft can pass.

By adopting the scheme, the convex block is arranged in an annular shape, so that the contact area between the convex block and the bearing can be increased to the greatest extent, and the supporting and limiting effects of the convex block on the bearing are ensured.

Preferably, the limiting part comprises a baffle plate which is arranged on the bearing seat and can be deformed inwards and bent to limit the bearing to be away from the shell along the axial direction of the rotor shaft.

By adopting the scheme, after the bearing lower bottom surface and the lug upper top surface are attached, the separation blade is driven by external force to deform and bend inwards, the separation blade is bent to abut against the upper top surface of the bearing, and the bearing can be limited to move away from the shell along the axial direction of the rotor shaft.

Preferably, a gasket is arranged between the bearing and the blocking piece, and after the blocking piece is deformed and bent inwards, two sides of the gasket are respectively abutted against the blocking piece and the bearing.

By adopting the scheme, the gasket is additionally arranged, and the damage caused by direct abutting of the bearing and the separation blade is avoided.

Preferably, the baffle is in an annular arrangement through which the rotor assembly and the spacer pass.

By adopting the scheme, the separation blade is in annular arrangement, and after the separation blade is deformed and bent, the contact area between the separation blade and the gasket can be increased to the greatest extent, and the limiting effect of the separation blade on the bearing is ensured.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect: through addding locking structure, in the rotor subassembly inserts the casing, the assembly back that targets in place, bearing and lug laminating restriction bearing continue to insert in the casing along the axial of rotor shaft, and at this moment, the axial of external force control separation blade buckling restriction bearing along the rotor shaft is kept away from the casing, therefore the axial that the bearing can't follow the rotor shaft removes to restriction rotor subassembly is along the axial float of rotor shaft, stability when improving the motor and using.

Drawings

Figure 1 is an isometric view of a motor for a hair dryer in one embodiment;

FIG. 2 is a front view of a blade of a motor for a hair dryer in an embodiment, which is not bent;

FIG. 3 isbase:Sub>A cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is an enlarged view of a portion of a bent baffle of a motor for a hair dryer in accordance with an exemplary embodiment;

fig. 6 is an exploded view of a housing, a bearing housing, a rotor assembly and a locking structure in a motor for a hair dryer in an embodiment.

The names of the parts indicated by the numerical references in the above figures are as follows: 1. a housing; 2. a stator assembly; 3. a rotor shaft; 4. a bearing; 5. a permanent magnet; 6. a bearing seat; 7. a bump; 8. a gasket; 9. a baffle plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

A motor for a hair dryer, referring to fig. 1 to 6, includes a housing 1, a stator assembly 2 is disposed inside the housing 1, the stator assembly 2 is prior art, and details are not described herein; still include the rotor subassembly, the rotor subassembly comprises rotor shaft 3, bearing 4 and permanent magnet 5, and bearing 4 and permanent magnet 5 are fixed in on rotor shaft 3 and set up with rotor shaft 3 is concentric, and bearing 4 is provided with two along rotor shaft 3's axial interval in this embodiment, and two bearings 4 all are located permanent magnet 5's top. For the installation of rotor subassembly, be provided with bearing frame 6 on the casing 1, external force promotes the rotor subassembly and passes in bearing frame 6 inserts casing 1, until the rotor subassembly assembles to the right place, in this embodiment, rotor subassembly assembly is in the right place to mean permanent magnet 5 and stator module 2 are just right, the outer rampart of bearing 4 and the inner ring wall interference fit of bearing frame 6 realize the preliminary positioning of rotor subassembly, then control locking structure takes effect, restriction rotor subassembly is along the axial float of rotor shaft 3 in the motor operation process.

The locking structure comprises a convex block 7 which is arranged on the inner wall of the bearing seat 6 in an inward protruding mode, and a blocking piece 9 is arranged at one end, far away from the convex block 7, of the bearing seat 6. When the rotor assembly is inserted into the shell 1 for installation, after the permanent magnet 5 and the stator assembly 2 are opposite, the lower bottom surface of the bearing 4 close to the permanent magnet 5 is attached to the upper top surface of the bump 7, and the bearing 4 is limited to be continuously inserted into the shell 1 along the axial direction of the rotor shaft 3; at the moment, the external force control baffle plate 9 is bent until the external force control baffle plate is abutted to the upper top surface of the bearing 4 far away from the permanent magnet 5, so that the bearing 4 is limited to be far away from the shell 1 along the axial direction of the rotor shaft 3, the rotor assembly cannot move along the axial direction of the rotor shaft 3 under the clamping of the convex block 7 and the baffle plate 9, and the stability of the motor in use is improved. And the lug 7 and the baffle plate 9 are both arranged in an annular shape, so that the contact area, namely the stress area, with the bearing 4 is increased to the maximum extent, and the limiting effect on the rotor component is further ensured. Besides, in order to avoid the damage that bearing 4 and separation blade 9 direct butt produced, be provided with gasket 8 between bearing 4 and separation blade 9, in this embodiment when the lower bottom surface of the pivot that is close to permanent magnet 5 is laminated with the last top surface of boss, the last top surface of the pivot of keeping away from permanent magnet 5 flushes with the last top surface of bearing 4 seat, separation blade 9 sets up on the last top surface of bearing 4 seat, gasket 8 of taking makes gasket 8 erect on the last top surface of bearing 4 seat, the separation blade 9 of buckling, gasket 8 both sides respectively with separation blade 9 and bearing 4 seat top surface butt, consequently, gasket 8 is static for bearing 4 seat, gasket 8 and the last top surface butt of the pivot of keeping away from permanent magnet 5 this moment, thereby restrict rotor subassembly and keep away from casing 1 along rotor shaft 3's axial, realize spacing to rotor subassembly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a motor for hair-dryer, includes casing (1) and in the inside rotor subassembly that sets up of casing (1), the rotor subassembly includes rotor shaft (3) and bearing (4) of concentric setting on rotor shaft (3), is provided with bearing frame (6) on casing (1), when bearing frame (6) and bearing (4) interference fit, the rotor subassembly is installed in casing (1), its characterized in that: when the rotor assembly is installed in the shell (1), a locking structure for limiting the axial movement of the rotor assembly along the rotor shaft (3) is arranged between the bearing seat (6) and the rotor assembly.

2. A motor for a hair dryer as claimed in claim 1, wherein: the locking structure comprises a supporting part which is arranged on the bearing seat (6) and is attached to the lower bottom surface of the bearing (4) when the rotor assembly is arranged in the shell (1), and a limiting part which is arranged on the bearing seat (6) and limits the bearing (4) to be separated from the supporting part when the lower bottom surface of the bearing (4) is attached to the supporting part.

3. A motor for a hair dryer as claimed in claim 2, wherein: the supporting part comprises a convex block (7) which is arranged on the inner wall of the bearing seat (6) in an inward protruding mode, and when the rotor assembly is installed in the shell (1), the lower bottom surface of the bearing (4) is attached to the upper top surface of the convex block (7).

4. A motor for a hair dryer as claimed in claim 3, wherein: the lug (7) is arranged in a ring shape for the rotor shaft (3) to pass through.

5. A motor for a hair dryer according to claim 2, wherein: the limiting part comprises a blocking piece (9) which is arranged on the bearing seat (6), can deform inwards and limit the bearing (4) to be away from the shell (1) along the axial direction of the rotor shaft (3) after being bent.

6. A motor for a hair dryer as claimed in claim 5, wherein: a gasket (8) is arranged between the bearing (4) and the blocking piece (9), and after the blocking piece (9) is deformed and bent inwards, two sides of the gasket (8) are respectively abutted against the blocking piece (9) and the bearing (4).

7. A motor for a hair dryer as claimed in claim 6, wherein: the baffle plates (9) are arranged in an annular shape for the rotor component and the gasket (8) to pass through.

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