A bearing structure for an air purifier

Abstract

The application provides a bearing structure for an air purifier, comprising a bearing upper cover, a plurality of balls, a bearing disc and a bearing lower cover, the plurality of balls are embedded in the bearing disc, a limiting structure is arranged between the bearing upper cover and the bearing lower cover; the bearing upper cover is provided with an annular notch; the bearing lower cover is provided with an annular boss which can match the notch; the annular notch and the annular boss constitute the limiting structure; during assembly, the bearing lower cover is pushed into the inside of the extension part from bottom to top, the annular boss is elastically clamped into the annular notch, axial and radial limiting is formed, the axial play is eliminated by the clamping of the annular boss and the annular notch, the bearing upper cover and the bearing lower cover are prevented from separating or moving in the radial direction, the bearing structure is ensured to be not separated and not eccentric when bearing axial load and long-term operation, and 360° smooth rotation with low noise, maintenance-free and long service life is realized.

Description

Technical Field

[0001] This application relates to the technical field of air purifiers, and more particularly to a bearing structure for air purifiers. Background Technology

[0002] Air purifiers on the market typically have a rotating base at the bottom. A motor drives a turntable or bearing between the base and the main body, enabling the entire unit to rotate 360° horizontally or deliver air in a wide angle. This allows for adjustment of the orientation and expansion of the purification range, indirectly achieving "dynamic coverage." However, these bearings usually rotate the main body via the outer ring, while the inner ring is fixed to the base. They only bear radial loads and offer almost no resistance to the axial (vertical) loads of the main body's own weight.

[0003] While rotating, the bearing continuously applies axial load due to its own weight. Long-term operation and friction cause wear on the inner and outer rings of the bearing, especially when there is a lot of dust or high-frequency use. The grease is prone to drying and loss due to time and temperature differences, and the balls and fixing screws gradually loosen, causing the turntable to become eccentric, wobble, and reduce stability. The rotating structure lacks optimization, making it difficult to improve performance. Utility Model Content

[0004] In view of the above practical problems and the shortcomings of the existing technology, the main technical problem to be solved by this utility model is to provide a bearing structure for an air purifier that can maintain stable rotation while bearing the axial (up and down) load of the body weight.

[0005] To solve the above-mentioned technical problems, this application provides a bearing structure for an air purifier, adopting the following technical solution:

[0006] A bearing structure for an air purifier includes an upper bearing cover, a plurality of balls, a bearing disc, and a lower bearing cover, wherein the plurality of balls are embedded in the bearing disc, and a limiting structure is provided between the upper bearing cover and the lower bearing cover.

[0007] The outer periphery of the upper bearing cover extends downward into an annular extension, and an annular recess is formed on the inner side of the extension near the free end; the upper edge of the lower bearing cover protrudes radially outward to form an annular boss that matches the recess; the annular recess and the annular boss constitute the limiting structure.

[0008] During assembly, the lower bearing cover is pushed into the inner side of the extension from bottom to top, the annular boss elastically engages with the annular recess, the outer side of the lower bearing cover fits against the inner side of the extension, and the lower end face of the upper bearing cover, the inner side of the extension, and the upper end face of the lower bearing cover together form an annular cavity for accommodating and radially positioning the bearing disc.

[0009] In a preferred embodiment, a plurality of through holes are provided at equal intervals along the circumferential direction on the bearing disk, and one ball is assembled in each of the through holes.

[0010] In a preferred embodiment, the through hole adopts an inverted arc-shaped hole structure, and the upper and lower entrances of the through hole form a constricted structure.

[0011] In a preferred embodiment, all of the balls are made of stainless steel 304.

[0012] In a preferred embodiment, the upper end face of the bearing cover is provided with a first protrusion facing upwards, and the lower end face of the bearing cover is provided with a second protrusion facing downwards; the first protrusion is used to engage with the bottom slot of the air purifier body, and the second protrusion is used to engage with the positioning slot of the air purifier base.

[0013] In a preferred embodiment, three first protrusions are distributed at equal intervals along the circumferential direction of the bearing cover.

[0014] In a preferred embodiment, three second protrusions are evenly distributed along the circumferential direction of the lower bearing cover.

[0015] In a preferred embodiment, the upper bearing cover, bearing disc, and lower bearing cover are all made of POM material.

[0016] In summary, this application has the following beneficial effects:

[0017] 1. This utility model uses the annular recess of the upper bearing cover and the annular boss of the lower bearing cover to limit the axial and radial movement, thereby converting the axial (vertical) load of the product into the end face pressure of the upper and lower bearing covers. The engagement of the annular boss and the annular recess eliminates axial clearance, preventing the upper and lower bearing covers from separating or moving radially. This ensures that the bearing structure does not separate or become eccentric when bearing axial loads and during long-term operation, achieving low-noise, maintenance-free, and long-life 360° smooth rotation.

[0018] 2. The bearing upper cover, bearing disc and bearing lower cover of this utility model are all made of POM material, which has a low coefficient of friction, excellent wear resistance and good self-lubrication. It can operate for a long time in an oil-free or low-oil environment and can drive the air purifier to rotate for a long time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the bearing in this embodiment;

[0020] Figure 2 This is an exploded view of the overall structure of the bearing in this embodiment;

[0021] Figure 3This is an enlarged cross-sectional view of the assembly of the upper bearing cover and the lower bearing cover in this embodiment;

[0022] Figure 4 This is a schematic diagram of the overall structure of the bearing cover in this embodiment;

[0023] Figure 5 This is a schematic diagram of the overall structure of the bearing disc in this embodiment;

[0024] Figure 6 This is a schematic diagram of the overall structure of the bearing lower cover in this embodiment;

[0025] Figure 7 This is a schematic diagram of the bearing structure assembled in the air purifier in this embodiment.

[0026] Explanation of reference numerals in the attached drawings: 1. Bearing structure; 11. Bearing upper cover; 111. Extension; 112. Annular notch; 113. First protrusion; 12. Ball; 13. Bearing disc; 131. Through hole; 14. Bearing lower cover; 141. Annular boss; 142. Second protrusion; 2. Air purifier; 21. Bottom of the unit; 22. Base. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0031] To ensure the air purifier can withstand the load generated by its own weight while rotating, and to solve problems such as bearing wear, jamming, or eccentricity during long-term operation, this embodiment features a special design for the bearing structure, enabling the air purifier to rotate smoothly over a long period of time and improving the user experience.

[0032] This embodiment provides a bearing structure for an air purifier, such as... Figure 2 The bearing structure 1 includes an upper bearing cover 11, several balls 12, a bearing disc 13, and a lower bearing cover 14. The balls 12 are all made of 304 stainless steel. Figure 5 A plurality of through holes 131 are provided at equal intervals along the circumferential direction on the bearing disk 13. The through holes 131 adopt an inverted arc hole structure, and the upper and lower entrances of the through holes 131 form a constricted structure. A ball 12 is assembled in one through hole 131. The ball 12 is embedded in the through hole 131 through clearance fit to form a rolling pair. The inverted arc hole structure design can prevent the ball 12 from axially dislodging.

[0033] The upper bearing cover 11 and the lower bearing cover 14 are fastened together, and the bearing disc 13 with the embedded balls 12 is sandwiched between them to form the bearing structure 1. The balls 12 are confined in the inverted arc hole of the bearing disc 13 and simultaneously form four-point contact with the inner ring surfaces of the upper bearing cover 11 and the lower bearing cover 14, so that the bearing structure 1 maintains low-friction rolling when bearing axial load, and realizes the smooth, long-lasting, and eccentric 360° horizontal rotation of the whole machine.

[0034] A limiting structure is provided between the upper bearing cover 11 and the lower bearing cover 14. The limiting structure forms an axial limit to prevent the upper bearing cover 11 and the lower bearing cover 14 from separating vertically. Under the load generated by the weight of the product, it prevents the bearing from "running" and becoming eccentric.

[0035] The limiting structure includes an annular recess 112 provided on the upper bearing cover 11 and an annular boss 141 provided on the lower bearing cover 14, such as Figure 4 The bearing cover 11 has an annular extension 111 extending downward from its outer periphery. An annular recess 112 is formed on the inner side of this extension 111 near its free end. Figure 6 The upper edge of the lower bearing cover 14 protrudes radially outward, forming an annular boss 141 that matches the recess.

[0036] During assembly, the lower bearing cover 14 is pushed into the inner side of the annular extension 111 from bottom to top. The annular boss 141 elastically engages with the annular recess 112, achieving simultaneous axial and radial locking. At this time, the outer surface of the lower bearing cover 14 fits against the inner surface of the annular extension 111, and the lower end face of the upper bearing cover 11, the inner surface of the annular extension 111, and the upper end face of the lower bearing cover 14 together form an annular cavity (e.g., ...). Figure 3 The bearing disc 13 is used to accommodate and radially position the bearing with balls 12 installed, ensuring that the bearing structure 1 does not come off or become eccentric when subjected to axial loads and long-term operation.

[0037] The bearing structure 1 provided in this embodiment is also provided with a connection structure for installation in conjunction with the air purifier 2, such as... Figure 1 The connecting structure includes three ribs respectively disposed on the upper bearing cover 11 and the lower bearing cover 14. The specific structure is as follows:

[0038] like Figure 4 The upper end face of the bearing cover 11 is provided with a first protrusion 113, which serves as a rotational transmission rib. Three first protrusions 113 are evenly distributed along the circumferential direction. The first protrusions 113 are used to engage with the slots at the bottom 21 of the air purifier 2. The rotation of the bearing cover 11 can drive the body of the air purifier 2.

[0039] like Figure 6 The lower end face of the bearing cover 14 is provided with a second protrusion 142 facing downwards. The second protrusion 142 serves as a static limiting rib, and three second protrusions 142 are evenly distributed along the circumferential direction. The second protrusion 142 is used to engage with the positioning groove of the base 22 of the air purifier 2, and the bearing cover 14 and the base 22 of the air purifier 2 remain stationary.

[0040] When the air purifier 2 is in operation, the motor is started. The rotation of the motor's output shaft is transmitted to the air purifier 2 body through the bearing disc 13, ball bearing 12, and bearing cover 11, thereby driving the overall rotation of the air purifier 2 body. Meanwhile, the bearing cover 14 and the base 22 remain stationary, achieving a 360° stable rotation with "moving on top and stationary on the bottom".

[0041] In this embodiment, the upper bearing cover 11, the bearing disc 13, and the lower bearing cover 14 are all made of POM material, which has a low coefficient of friction, excellent wear resistance, and good self-lubrication. It can operate for a long time in an oil-free or low-oil environment and can drive the air purifier 2, which rotates the whole machine, for a long time.

[0042] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A bearing structure for an air purifier, characterized in that: It includes a bearing upper cover, a plurality of balls, a bearing disc, and a bearing lower cover, wherein the plurality of balls are embedded in the bearing disc, and a limiting structure is provided between the bearing upper cover and the bearing lower cover; The outer periphery of the upper bearing cover extends downward into an annular extension, and an annular recess is formed on the inner side of the extension near the free end; the upper edge of the lower bearing cover protrudes radially outward to form an annular boss that matches the recess; the annular recess and the annular boss constitute the limiting structure. During assembly, the lower bearing cover is pushed into the inner side of the extension from bottom to top, the annular boss elastically engages with the annular recess, the outer side of the lower bearing cover fits against the inner side of the extension, and the lower end face of the upper bearing cover, the inner side of the extension, and the upper end face of the lower bearing cover together form an annular cavity for accommodating and radially positioning the bearing disc.

2. The bearing structure for an air purifier according to claim 1, characterized in that: The bearing disc has several through holes at equal intervals along the circumference, and one ball is assembled in each of the through holes.

3. The bearing structure for an air purifier according to claim 2, characterized in that: The through hole adopts an inverted arc-shaped hole structure, and the upper and lower entrances of the through hole form a constricted structure.

4. The bearing structure for an air purifier according to claim 1, characterized in that: All of the balls are made of 304 stainless steel.

5. A bearing structure for an air purifier according to claim 1, characterized in that: The upper end of the bearing cover is provided with a first protrusion facing upwards, and the lower end of the bearing cover is provided with a second protrusion facing downwards; the first protrusion is used to engage with the bottom slot of the air purifier body, and the second protrusion is used to engage with the positioning slot of the air purifier base.

6. A bearing structure for an air purifier according to claim 5, characterized in that: Three of the first protrusions are evenly distributed along the circumference of the bearing cover.

7. A bearing structure for an air purifier according to claim 5, characterized in that: Three second protrusions are evenly distributed along the circumference of the lower cover of the bearing.

8. A bearing structure for an air purifier according to claim 1, characterized in that: The upper bearing cover, bearing disc, and lower bearing cover are all made of POM material.

Images