CN218216918U - Fan structure - Google Patents

Abstract

The utility model discloses a fan structure, place the organism of casing in including the casing, the organism includes stator module, rotor subassembly and PCB circuit board, wherein, the embedded bearing that is fixed with in stator module's center department, the bearing is located the center department of casing, the protruding axle core that stretches out of center department of rotor subassembly, axle core pass the bearing, the sunken draw-in groove that forms of free end of axle core, the draw-in groove is located outside the terminal surface of bearing, and the silica gel snap ring cover of silica gel structure is located on the axle core and is located draw-in groove department, the external diameter of silica gel snap ring is greater than the aperture of bearing, and the internal diameter of silica gel snap ring is greater than the diameter of the axle core of draw-in groove department and is less than the aperture of bearing, and the axle core borrows by blockking of silica gel snap ring and can's and can't follow throw away in the bearing. The utility model effectively ensures the normal operation of the fan structure through the cooperation of the silica gel snap ring, the clamping groove and the bearing, effectively reduces the noise and improves the stability of the fan structure operation; simple structure and practicality are strong, are suitable for extensively using widely.

Description

Fan structure

Technical Field

The utility model relates to a device for small household electrical appliances especially relates to a fan structure for air flow.

Background

Some small household appliances can use a fan at present, such as a direct current fan, and for different small household appliances, the fan structure has different functions, such as an electric fan, the fan has the function of providing wind power to cool the indoor environment, and the fan of some small household appliances has the function of dissipating heat for the power component of the small household appliances.

In the fan structure in the prior art, when the rotor assembly swings up and down (i.e., along the axial direction of the shaft core) along the axial direction of the shaft core, the shaft core collides with peripheral parts thereof due to the swinging, so that the frictional resistance of the fan structure during operation is increased, abnormal noise is generated, the service life of the fan structure is shortened, and the noise is increased.

Therefore, a fan structure which has a simple structure, can reduce noise and can improve stable operation is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure just can the noise reduction, can improve the fan structure of steady operation again.

In order to achieve the above object, the utility model provides a fan structure, place in including the casing the organism of casing, the organism includes stator module, rotor subassembly and PCB circuit board, stator module and PCB circuit board all are fixed in the casing, the PCB circuit board with stator module electric connection, the rotor subassembly is the pivoted cover and locates outside the stator module, wherein, the embedded bearing that is fixed with in stator module's center department, the bearing is located the center department of casing, the center department of rotor subassembly is protruding to stretch out the axle core, the axle core passes the bearing, the sunken draw-in groove that forms of free end of axle core, the draw-in groove is located outside the terminal surface of bearing, the silica gel snap ring cover of silica gel structure is located on the axle core and is located draw-in groove department, the external diameter of silica gel snap ring is greater than the aperture of bearing, the internal diameter of silica gel snap ring is greater than the diameter of the axle core of draw-in groove department and is less than the aperture of bearing, the axle core borrows by the stopping of silica gel snap ring and can's unable follow throw away in the bearing.

Preferably, the utility model discloses a fan structure the casing includes last casing and lower casing of mutual lock, place in the organism in the casing down, the central zone who goes up the casing is hollow structure, hollow structure forms the air outlet.

Preferably, the utility model discloses a fan structure the rotor subassembly includes rotor, magnetic ring and blade, the axle core certainly protruding the formation of stretching in the center department of rotor, the magnetic ring is fixed in the inner wall of rotor, the blade is fixed in the outer wall of rotor.

Preferably, the fan structure of the present invention the rotor and the blades are of an integral structure.

Preferably, the utility model discloses a fan structure the diameter of rotation of blade is greater than the bore of air outlet.

Compared with the prior art, the free end of the shaft core of the fan structure of the utility model is sunken to form a clamping groove which is positioned outside the end surface of the bearing; the shaft core is always limited in the bearing by the silica gel clamping ring, and the shaft core cannot be thrown out of the bearing due to the blocking of the silica gel clamping ring; the shaft core can not rub the silica gel snap ring when rotating, and the normal rotation of the shaft core is ensured; therefore, the utility model discloses a normal operation of fan structure has been effectually ensured in the cooperation of silica gel snap ring, draw-in groove and bearing. Simultaneously the utility model discloses still borrow the peculiar flexibility of silica gel structure by the silica gel snap ring, when borrowing the flexibility of silica gel snap ring and making the axle core take place upper and lower whipping, the tip of axle core directly strikes with this flexible silica gel snap ring, through the flexible buffering of silica gel snap ring, both effectual noise reduction has improved the stationarity of fan structure operation again. To sum up, the fan of the utility model has simple structure, can reduce noise and improve stable operation; the practicability is strong, and the device is very suitable for wide popularization and application.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of the fan structure of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely in conjunction with the specific embodiments and the accompanying drawings, so as to explain the technical solutions of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application. Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements throughout.

As shown in fig. 1, the blower structure of the present invention includes a housing and a body disposed in the housing. Specifically, the housing includes an upper housing 1 and a lower housing 2 that are fastened to each other, the housing is disposed in the lower housing 2, a central region of the upper housing 1 is a hollow structure, and the hollow structure forms an air outlet 3. The utility model discloses an organism includes stator module 4, rotor subassembly 5 and PCB circuit board 6. The utility model discloses a stator module 4 and PCB circuit board 6 all are fixed in down in the casing 1, PCB circuit board 6 and stator module 4's coil electric connection. The utility model discloses a rotor subassembly 5 is outside stator module 4 is located to the pivoted cover, the utility model discloses a stator module 4's concrete structure and theory of operation are prior art, know for technical personnel in the field, no longer give consideration to here in detail.

As shown in fig. 1 and 2, a bearing 7 is embedded and fixed in the center of the stator assembly 4 of the present invention, and the bearing 7 is located in the center of the housing. The center of the rotor component 5 of the utility model is protruded with a shaft core 8; specifically, the shaft core 8 of the present invention passes through the bearing 7, the free end of the shaft core 8 is recessed to form a slot 81, the slot 81 is located outside the end face 71 of the bearing 7, and the silica gel snap ring 9 of the silica gel structure is sleeved on the shaft core 8 and located at the slot 81; the utility model discloses an external diameter of silica gel snap ring 9 is greater than the aperture of bearing 7, and the internal diameter of silica gel snap ring 9 is greater than the diameter of the axle core of draw-in groove 81 department and is less than the aperture of bearing 7, axle core 8 borrow by blockking of silica gel snap ring 9 and can't throw away from bearing 7. Specifically, a plastic part 41 with a hollow structure is formed at the center of the stator assembly 4, and a step structure 42 is formed at the bottom of the plastic part 41; the silica gel snap ring 9 located in the clamping groove 81 is borne on the step structure 42, the bearing 7 is embedded and fixed in the hollow structure of the plastic part 41 in an interference fit manner, meanwhile, the end face 71 of the bearing 7 firmly presses and fixes the silica gel snap ring 9 on the step structure 42, namely, the silica gel snap ring 9 is clamped and fixed between the end face 71 of the bearing 7 and the step structure 42. Therefore, when the utility model is used, the shaft core 8 can not rub the silica gel snap ring 9 when the shaft core 8 rotates relative to the bearing 7, thereby ensuring the normal rotation of the shaft core 8; therefore, the utility model discloses a normal operation of fan structure has been effectually ensured in the cooperation of silica gel snap ring 9, draw-in groove 81 and bearing 7. Simultaneously the utility model discloses still borrow the peculiar flexibility of silica gel structure by means of silica gel snap ring 9, when borrowing the flexibility of silica gel snap ring 9 and making axle core 8 throw about taking place (promptly, along the axle center direction of axle core), the tip 82 of axle core 8 directly strikes with this flexible silica gel snap ring 9, through the flexible buffering of silica gel snap ring 9, both effectually reduced the noise, improved the stationarity of fan structure operation again.

As shown in fig. 1, preferably, the rotor assembly 5 of the blower structure of the present invention includes a rotor 51, a magnetic ring 52 and blades 53, the shaft core 8 is formed by protruding from the center of the rotor 51, the magnetic ring 52 is fixed on the inner wall of the rotor 51, and the blades 53 are fixed on the outer wall of the rotor 51, so that the whole rotor assembly 5 can synchronously rotate relative to the stator assembly 4 by using the shaft core 8 as a rotation axis. Specifically, the utility model discloses a fan structure's rotor 51 is the integral type structure with blade 53. Further, the rotating diameter of the blades 53 of the present invention is larger than the aperture of the air outlet 3; so that the air flow formed by the rotation of the blades can be blown out from the air outlet 3 in a more concentrated manner.

As shown in fig. 1 and fig. 2, the free end of the shaft core 8 of the fan structure of the present invention is recessed to form a slot 81, and the slot 81 is located outside the end face 71 of the bearing 7; the silica gel snap ring sleeve 9 with the silica gel structure is arranged at the clamping groove 81 of the shaft core 8, the outer diameter of the silica gel snap ring 9 is larger than the aperture of the bearing 7, and the inner diameter of the silica gel snap ring 9 is larger than the diameter of the shaft core at the clamping groove 81 and smaller than the aperture of the bearing 7, so that the shaft core 8 is always limited in the bearing 7 by the silica gel snap ring 9, and the shaft core 8 cannot be thrown out of the bearing due to the blocking of the silica gel snap ring 9; the shaft core 8 cannot rub the silica gel clamping ring 9 during rotation, and normal rotation of the shaft core 8 is guaranteed; therefore, the utility model discloses a normal operation of fan structure has been effectually ensured in the cooperation of silica gel snap ring 9, draw-in groove 81 and bearing 7. Simultaneously the utility model discloses still borrow the peculiar flexibility of silica gel structure by means of silica gel snap ring 9, when borrowing the flexibility of silica gel snap ring 9 and making axle core 8 in the upper and lower whipping of taking place, the tip 82 of axle core 8 directly strikes with this flexible silica gel snap ring 9, through the flexible buffering of silica gel snap ring 9, both effectual noise reduction has improved the stationarity of fan structure operation again. In summary, the fan of the utility model has simple structure, can reduce noise and improve stable operation; the practicability is strong, and the device is very suitable for wide popularization and application.

In addition, the specific structure and operation principle of the stator assembly 4, the rotor assembly 5 and the PCB circuit board 6 according to the present invention are well known to those skilled in the art, and will not be described in detail herein

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. It should be understood, however, that the drawings and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims.

Claims (5)

1. The utility model provides a fan structure, place in including the casing the organism of casing, the organism includes stator module, rotor subassembly and PCB circuit board, stator module and PCB circuit board all are fixed in the casing, the PCB circuit board with stator module electric connection, the rotor subassembly is the pivoted cover and locates outside the stator module, a serial communication port, the embedded bearing that is fixed with in stator module's center department, the bearing is located the center department of casing, the protruding axle core that stretches out of rotor module's center department, the axle core passes the bearing, the sunken draw-in groove that forms of free end of axle core, the draw-in groove is located outside the terminal surface of bearing, the silica gel snap ring cover of silica gel structure is located on the axle core and is located draw-in groove department, the external diameter of silica gel snap ring is greater than the aperture of bearing, the internal diameter of silica gel snap ring is greater than the diameter of the axle core of draw-in groove department is less than the aperture of bearing, the axle core borrows by the stopping of silica gel snap ring and can't follow throw away in the bearing.

2. The fan structure according to claim 1, wherein the housing includes an upper housing and a lower housing that are fastened to each other, the housing is disposed in the lower housing, a central region of the upper housing is a hollow structure, and the hollow structure forms the air outlet.

3. The fan structure as claimed in claim 2, wherein the rotor assembly includes a rotor, a magnetic ring and a blade, the shaft core is formed by protruding from a center of the rotor, the magnetic ring is fixed on an inner wall of the rotor, and the blade is fixed on an outer wall of the rotor.

4. The fan structure according to claim 3, wherein a rotation diameter of the blade is larger than a diameter of the air outlet.

5. The fan structure of claim 3 wherein the rotor is of unitary construction with the blades.

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