CN109931298B

CN109931298B - Single-shaft anti-eccentricity system for small fan bearing

Info

Publication number: CN109931298B
Application number: CN201910338458.0A
Authority: CN
Inventors: 陈亮光; 刘宁; 刘向远; 杨春峰; 陶铁军; 江飘
Original assignee: Guizhou University
Current assignee: Guizhou University
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-12-08
Anticipated expiration: 2039-04-25
Also published as: CN109931298A

Abstract

The invention discloses a single-shaft anti-eccentricity system for a small fan shaft sleeve, which comprises an inverted U-shaped fan blade shell, wherein a fan blade is arranged on an outer shell of the fan blade shell, a first convex plastic part, a circular plastic part and a second convex plastic part are sequentially arranged in the fan blade shell from top to bottom, the first convex plastic part and the second convex plastic part are oppositely arranged, the convex ends of the first convex plastic part and the second convex plastic part are clamped in round holes of the circular plastic part, screws sequentially penetrate through the fan blade shell, the first convex plastic part and the circular plastic part from the top of the fan blade shell to the bottom and then penetrate into the second convex plastic part to fix 4 parts, the center of the first convex plastic part is internally provided with a thread counter bore from the convex end surface, and the center of the second convex plastic. The invention has simple structure, adopts the two ends to balance the stress, enlarges the resistance axis radius, controls the deformation of the shaft sleeve in a minimum range, prevents the eccentricity and can avoid the generation of larger noise after the fan works for a long time.

Description

Single-shaft anti-eccentricity system for small fan bearing

Technical Field

The invention relates to a single-shaft anti-eccentricity system, in particular to a single-shaft anti-eccentricity system for a small fan bearing.

Background

After the traditional small-sized motor shaft sleeve is used for a long time, unbalanced stress is easy to occur, so that the fan blades are eccentric, and larger noise is generated, or the stress in a certain direction is too large, so that the small-sized motor shaft sleeve is easy to deform and cannot be restored to the original state, and the small-sized motor shaft sleeve is eccentric. The eccentric shaft sleeve drives the fan blades to rotate repeatedly, so that great noise can be generated, great inconvenience is brought to learning and living, people cannot concentrate on attention to finish tasks, especially, when the shaft sleeve is stressed greatly or is used for a long time, if a fan topples over or collides with other sundries, the eccentric shaft sleeve is easy to generate noise, troubles are brought to a quiet environment, when too much noise cannot be generated, if classroom learning is carried out, library individuals read or household fans. Along with people's quality of life is higher and higher, also higher and higher to the requirement of material, and in the purchase electrical apparatus process, people attach importance to the silence effect more and more, because traditional small-size motor produces the noise easily for its market share is lower and lower more, thereby leads to traditional small-size motor axle sleeve practicality value not high.

Disclosure of Invention

The invention aims to provide a single-shaft anti-eccentricity system for a small fan bearing. The invention has simple structure, adopts the two ends to balance the stress, enlarges the resistance axis radius, controls the deformation of the shaft sleeve in a minimum range, prevents the eccentricity and can avoid the generation of larger noise after the fan works for a long time.

The technical scheme of the invention is as follows: the utility model provides an anti eccentric system of unipolar for small-size fan shaft sleeve, including the flabellum shell of the shape of falling U, be provided with the flabellum on the outside casing of flabellum shell, flabellum shell is inside from top to bottom has set gradually first convex working of plastics, ring shape working of plastics and second convex working of plastics, first convex working of plastics and second convex working of plastics set up in opposite directions, its protruding end card goes into in the round hole of ring shape working of plastics, the screw passes the flabellum shell from flabellum shell top downwards in proper order, behind first convex working of plastics and the ring shape working of plastics, penetrate and fix 4 parts in the second convex working of plastics, first convex working of plastics center, be provided with the screw thread counter bore from its protruding terminal surface, second convex working of plastics.

In the anti eccentric system of unipolar for small-size fan shaft sleeve, evenly be provided with a plurality of screw holes on flabellum shell, first convex working of plastics, the ring shape working of plastics and the second convex working of plastics.

In the uniaxial anti-eccentricity system for the small fan shaft sleeve, the thickness of the circular ring-shaped plastic part is greater than or equal to the sum of the heights of the convex parts of the first convex plastic part and the second convex plastic part.

In the single-shaft anti-eccentricity system for the small fan shaft sleeve, the diameter of the circular hole of the circular ring-shaped plastic part is equal to the diameter of the protruding parts of the first convex plastic part and the second convex plastic part.

The invention has the beneficial effects that: compared with the prior art, the first convex plastic part and the second convex plastic part are oppositely arranged, the protruding parts of the first convex plastic part and the second convex plastic part are clamped into the circular plastic part, the two protruding plastic parts form two acting supporting points, so that the whole stress is stable and balanced, the radius of the whole component is expanded to a certain degree, the capacity of the component for resisting deformation of the external force is improved, and the deformation of the shaft sleeve is controlled in a minimum range. The invention has simple structure, prevents eccentricity and prevents the fan from generating larger noise after long-time work. People can feel the comfort brought by the influence of low noise of the fan at any time, and most importantly, the impatience state brought by the noise to work and study is greatly reduced. Has good popularization and practical value, and can generate good economic benefit and social benefit after wide popularization and application.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of a fan blade housing;

FIG. 3 is a schematic structural view of a second male plastic part;

FIG. 4 is a schematic view of a first male plastic part;

FIG. 5 is a schematic structural view of a circular plastic part;

reference numerals: 1-fan blade, 2-fan blade shell, 3-screw, 4-second convex plastic piece, 5-first convex plastic piece, 6-circular ring plastic piece, 7-threaded hole and 8-motor rotating shaft.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

The embodiment of the invention comprises the following steps: the utility model provides an anti eccentric system of unipolar for small-size fan axle sleeve, as shown in the attached figure 1-5, flabellum shell 2 including 1 shape of falling U, evenly fixed being provided with a plurality of flabellum 1 on flabellum shell 2's the outside casing, flabellum shell 2 is inside to have set gradually first convex working of plastics 5 from top to bottom, ring shape working of plastics 6 and second convex working of plastics 4, the protruding end of first convex working of plastics 5 and second convex working of plastics 4 sets up in opposite directions, its protruding end all blocks in the round hole of ring shape working of plastics 6, screw 3 passes flabellum shell 2 downwards from flabellum shell 2 tops in proper order, after first convex working of plastics 5 and the ring shape working of plastics 6, penetrate and fix 4 parts in the second convex working of plastics 4. The center of the first convex plastic part 5 is internally provided with a threaded counter bore from the convex end surface thereof, and the center of the second convex plastic part 4 is provided with a threaded through hole. In the use process, the motor rotating shaft 8 is screwed in from the threaded through hole of the second convex plastic part 4 at the bottom and then is screwed in the threaded counter bore of the first convex plastic part 5, so that the whole anti-eccentricity system is connected with other components of the fan.

A plurality of threaded holes 7 are uniformly formed in the fan blade shell 2, the first convex plastic part 5, the annular plastic part 6 and the second convex plastic part 4. The screws 3 penetrate through the threaded holes 7 of the components to lock and fix the components together, and the threaded holes 7 are uniformly distributed to ensure that the components can be well locked and connected.

The thickness of the circular ring-shaped plastic part 6 is more than or equal to the sum of the heights of the convex parts of the first convex plastic part 5 and the second convex plastic part 4. This setting can be so that first convex working of plastics 5 and the 4 protruding parts card of second convex working of plastics go into the round hole of ring shape working of plastics 6 back, and the surface homoenergetic of first convex working of plastics 5 and second convex working of plastics 4 is in the same place with the close laminating in surface of ring shape working of plastics 6, constitutes 1 complete whole.

The diameter of the circular hole of the circular ring-shaped plastic part 6 is equal to the diameter of the protruding parts of the first convex plastic part 5 and the second convex plastic part 4. This setting is also for making first convex working of plastics 5, second convex working of

plastics

4 and 6 interconnect processes of ring shape working of plastics realize seamless connection, constitutes 1 complete whole, does not have the clearance each other simultaneously, also makes things convenient for screw 3 to penetrate, and it is more convenient to assemble.

Claims

1. The utility model provides an anti eccentric system of unipolar for small-size fan shaft sleeve which characterized in that: comprises an inverted U-shaped fan blade shell (2), a fan blade (1) is arranged on an outer shell of the fan blade shell (2), a first convex plastic part (5), a circular ring-shaped plastic part (6) and a second convex plastic part (4) are sequentially arranged in the fan blade shell (2) from top to bottom, the first convex plastic part (5) and the second convex plastic part (4) are oppositely arranged, the convex end of the fan blade is clamped in a round hole of a circular ring-shaped plastic piece (6), after a screw (3) sequentially penetrates through the fan blade shell (2), the first convex plastic piece (5) and the circular ring-shaped plastic piece (6) from the top of the fan blade shell (2) downwards, penetrate into the second convex plastic part (4) to fix 4 parts, the center of the first convex plastic part (5) is internally provided with a thread counter bore from the convex end surface, and the center of the second convex plastic part (4) is provided with a thread through hole.

2. The uniaxial anti-eccentricity system for a small fan sleeve as set forth in claim 1, wherein: a plurality of threaded holes (7) are uniformly formed in the fan blade shell (2), the first convex plastic part (5), the circular ring-shaped plastic part (6) and the second convex plastic part (4).

3. The uniaxial anti-eccentricity system for a small fan sleeve as set forth in claim 1, wherein: the thickness of the circular ring-shaped plastic part (6) is more than or equal to the sum of the heights of the convex parts of the first convex plastic part (5) and the second convex plastic part (4).

4. The uniaxial anti-eccentricity system for a small fan sleeve as set forth in claim 1, wherein: the diameter of the circular hole of the circular ring-shaped plastic part (6) is equal to the diameter of the protruding parts of the first convex plastic part (5) and the second convex plastic part (4).