A fan rotating shaft mechanism

Abstract

The application discloses a fan rotating shaft mechanism, which comprises a bearing assembly matched with a base hole shaft, the bearing assembly realizes rolling friction with the side surface and bottom surface of the base at the same time, the bearing assembly comprises a rotating shaft base, a plurality of circular grooves distributed in a circle are arranged in the rotating shaft base, steel balls are arranged in the circular grooves, a rotating shaft cover plate is arranged on the top of the rotating shaft base and is used for positioning and rolling of the steel balls, and the bottom and inner side of the circular groove are provided with through holes; the steel balls are exposed to the rotating shaft base through the through holes in the bottom and inner side and form rolling friction with the base; single steel ball is adopted to realize bidirectional rolling friction of the inner wall and bottom of the bearing; the elastic arm in the horizontal direction solves the hole shaft matching tolerance problem in practical application and solves the manufacturing precision problem of parts; and through the double improvement of high-precision hardware bearing replacement POM self-lubricating plastic and mechanism simplification, the manufacturing cost is greatly reduced, and the manufacturing yield and product motion life are improved.

Description

Technical Field

[0001] This invention belongs to the field of fan shaft technology, and specifically relates to a fan shaft mechanism. Background Technology

[0002] Currently, the mainstream shaft and motion support structure in the fan and related home appliance market generally uses surface contact friction and line contact friction with hole-shaft mating; some use metal bearing mechanisms to reduce physical friction and improve the life of their reciprocating motion mechanism.

[0003] In actual production, due to the dimensional tolerances of the outer diameter of the base bushing and the inner diameter of the rotating shaft mechanism hole, such tight fits are prone to jamming or friction noise; loose fits can lead to problems such as wobbling or head shaking and poor stability. This process is a pain point in the manufacturing management of the fan industry.

[0004] Therefore, this invention designs a novel fan shaft mechanism. Summary of the Invention

[0005] The purpose of this invention is to provide a fan shaft mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fan shaft mechanism, including a bearing assembly that cooperates with a base hole shaft, wherein the bearing assembly simultaneously achieves rolling friction with the side and bottom surfaces of the base.

[0007] Preferably, the bearing assembly includes a rotating shaft base, a plurality of circumferentially distributed circular grooves formed in the rotating shaft base, steel balls placed in the circular grooves, a rotating shaft cover plate located at the top of the rotating shaft base for positioning and rolling of the steel balls, and through holes provided at the bottom and inner side of the circular grooves; the steel balls are exposed to the rotating shaft base through the through holes at the bottom and inner side and form rolling friction with the base.

[0008] Preferably, the bottom inner side of the rotating shaft cover is provided with an arc-shaped limiting frame plate for positioning and rotating the steel ball. The limiting frame plate and the circular groove form a rolling groove for positioning and rolling the steel ball. The limiting frame plate and the rotating shaft cover are integrally formed into a single structure.

[0009] Preferably, the rotating shaft base and the rotating shaft cover are connected by a snap-fit ​​structure. The snap-fit ​​structure includes a snap-fit ​​groove on the outside of the rotating shaft base and a snap fastener on the outside of the rotating shaft cover that corresponds to the snap-fit ​​groove. The snap fastener and the snap-fit ​​groove cooperate to engage and connect with each other.

[0010] Preferably, the inner side of the rotating shaft base has an elastic arm for resetting the steel ball after it is squeezed, and the position of the elastic arm corresponds to that of the circular groove.

[0011] Preferably, the space between the rolling groove and the steel ball is filled with grease for lubrication.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention employs a single ball bearing to achieve bidirectional rolling friction between the inner wall and bottom of the bearing; the horizontal elastic arm solves the hole-shaft fit tolerance problem in practical applications and the component manufacturing precision problem; furthermore, through the dual improvements of replacing high-precision metal bearings with POM self-lubricating plastic and simplifying the mechanism, the manufacturing cost is significantly reduced, and the manufacturing yield and product lifespan are improved. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the present invention in its assembled and used state;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a three-dimensional structural diagram of the mechanism of the present invention;

[0017] Figure 4 This is an exploded structural diagram of the rotating shaft mechanism of the present invention;

[0018] Figure 5 This is an exploded structural diagram of the rotating shaft mechanism of the present invention;

[0019] In the diagram: 1. Rotary shaft base; 2. Rotary shaft cover plate; 3. Base; 4. Buckle; 5. Steel ball; 6. Circular groove; 7. Elastic arm; 8. Buckle slot; 9. Limiting frame plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 5This invention provides a technical solution: a fan shaft mechanism, including a bearing assembly that mates with a hole shaft in a base 3. The bearing assembly simultaneously achieves rolling friction with the side and bottom surfaces of the base 3. In this embodiment, preferably, the bearing assembly includes a shaft base 1, a plurality of circumferentially distributed circular grooves 6 formed within the shaft base 1, steel balls 5 placed within the circular grooves 6, and a shaft cover plate 2 located at the top of the shaft base 1 for positioning and rolling the steel balls 5. Through holes are provided at the bottom and inner sides of the circular grooves 6. The steel balls 5 are exposed to the shaft base 1 through the through holes at the bottom and inner sides, and form rolling friction with the base 3. This is superior to the hole-shaft surface contact friction in traditional shaft mechanisms and the line contact friction with the addition of rice grain-like rib structures in some products.

[0022] In this embodiment, preferably, an arc-shaped limiting plate 9 for positioning and rotating the steel ball 5 is provided on the inner bottom side of the rotating shaft cover plate 2. The limiting plate 9 and the circular groove 6 form a rolling groove for positioning and rolling the steel ball 5. The limiting plate 9 and the rotating shaft cover plate 2 are integrally formed structures.

[0023] In this embodiment, preferably, the rotating shaft base 1 and the rotating shaft cover 2 are connected by a snap-fit ​​structure. The snap-fit ​​structure includes a snap-fit ​​groove 8 disposed on the outside of the rotating shaft base 1 and a snap-fit ​​4 disposed on the outside of the rotating shaft cover 2 and corresponding to the snap-fit ​​groove 8. The snap-fit ​​4 and the snap-fit ​​groove 8 cooperate with each other to snap-fit ​​and connect.

[0024] In this embodiment, preferably, the inner side of the rotating shaft base 1 has an elastic arm 7 for the steel ball 5 to reset after being squeezed by force, and the position of the elastic arm 7 corresponds to the circular groove 6. The outer diameter of the shaft of the base 3 is interference-fitted with the inner diameter of the hole of the rotating shaft mechanism. When the steel ball 5 is squeezed by force, the elastic arm 7 in the rotating shaft base 1 deforms; the hole-shaft mechanism changes from a rigid fit to a flexible fit; effectively solving the cumulative tolerance problem in the assembly process, and realizing rolling friction, reducing friction, and improving the service life of the motion mechanism.

[0025] In this embodiment, preferably, the space between the rolling groove and the steel ball 5 is filled with grease for lubrication to improve the life of the moving mechanism.

[0026] Although embodiments of the invention have been shown and described in detail above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fan shaft mechanism, comprising a bearing assembly that mates with a hole in a base (3), characterized in that, The bearing assembly and the side and bottom surfaces of the base (3) simultaneously achieve rolling friction.

2. The fan shaft mechanism according to claim 1, characterized in that, The bearing assembly includes a rotating shaft base (1), a plurality of circular grooves (6) distributed in a circular pattern within the rotating shaft base (1), steel balls (5) placed in the circular grooves (6), and a rotating shaft cover plate (2) located at the top of the rotating shaft base (1) for positioning and rolling of the steel balls (5). The bottom and inner side of the circular grooves (6) are provided with through holes. The steel balls (5) are exposed to the rotating shaft base (1) through the through holes at the bottom and the inner side, and form rolling friction with the base (3).

3. A fan shaft mechanism according to claim 2, characterized in that, The bottom inner side of the rotating shaft cover plate (2) is provided with an arc-shaped limiting frame plate (9) for positioning and rotating the steel ball (5). The limiting frame plate (9) and the circular groove (6) form a rolling groove for positioning and rolling the steel ball (5). The limiting frame plate (9) and the rotating shaft cover plate (2) are integrally formed into a single structure.

4. A fan shaft mechanism according to claim 2, characterized in that, The rotating shaft base (1) and the rotating shaft cover plate (2) are connected by a snap-fit ​​structure. The snap-fit ​​structure includes a snap-fit ​​groove (8) on the outside of the rotating shaft base (1) and a snap-fit ​​(4) on the outside of the rotating shaft cover plate (2) and corresponding to the snap-fit ​​groove (8). The snap-fit ​​(4) and the snap-fit ​​groove (8) are engaged and connected to each other.

5. A fan shaft mechanism according to claim 2, characterized in that, The inner side of the rotating shaft base (1) has an elastic arm (7) for the steel ball (5) to reset after being squeezed by force, and the elastic arm (7) corresponds to the position of the circular groove (6).

6. A fan shaft mechanism according to claim 2, characterized in that, The space between the rolling groove and the steel ball (5) is filled with grease for lubrication.

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