Combined bearing and oscillating fan

Abstract

The utility model discloses a combination bearing and an oscillating fan, and the combination bearing comprises a rolling assembly which comprises an inner ring and a middle ring, and the middle ring is arranged around the inner ring and is in rolling connection with the inner ring; the outer ring assembly is rotationally sleeved on the middle ring and is in spherical sliding fit with the middle ring; the outer ring assembly comprises a first outer ring and a second outer ring, the first outer ring is provided with a fixing protrusion, the second outer ring is provided with a fixing groove, the fixing protrusion and the fixing groove are in interference fit through press fitting, and the first outer ring and the second outer ring are rotationally connected with the outer walls of the two ends of the middle ring respectively. The advantages of a sliding bearing and a rolling bearing are effectively combined, the middle ring and the outer ring assembly are in spherical sliding fit, and a large aligning angle is achieved; the inner ring and the middle ring are combined into a structure similar to a rolling bearing, so that the effect of generating lower noise during high-speed use is achieved; besides, the first outer ring and the second outer ring are in interference fit by adopting a press-in method, so that the assembly of the middle ring, the first outer ring and the second outer ring is realized, the assembly is efficient and convenient, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary support, in particular to a combined bearing and an oscillating fan with the combined bearing. Background Art

[0002] The oscillating fan can blow air to the annular area. In the related art, the motor shaft of the oscillating fan motor needs to realize both the swinging and shaking function at a certain angle and the self-rotating air outlet function. Among them, the motor shaft of the oscillating fan and the outer shell of the oscillating fan are matched with a joint bearing, and the joint bearing and the outer shell of the oscillating fan are spherically matched. A through hole is opened in the middle of the joint bearing, and the motor shaft of the oscillating fan is penetrated through the through hole to extend out of the outer shell and fixed with the fan blades. However, the joint bearing is not suitable for use in high-speed rotation, and the noise generated by the oscillating fan is large when used. In some related technologies, the motor shaft of the oscillating fan and the outer shell of the oscillating fan are matched with rolling bearings, which are suitable for use in high-speed rotation. However, the rolling bearing does not have the function of self-aligning swing, and the blowing area of ​​the oscillating fan is narrow. In some related technologies, the combined bearing includes an outer ring, a middle ring and an inner ring connected in sequence, and the principle of thermal expansion and contraction is used for assembly. It is necessary to heat the parts with larger assembly dimensions or use liquid nitrogen to cool the parts with smaller assembly dimensions. The requirements for equipment are high and the assembly cost is high; and it is not convenient to inject lubricating oil inside, and the lubricity of rotation is poor. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a combined bearing, which is easy to assemble, combines the advantages of a sliding bearing and a rolling bearing, and meets the application requirements of large angle adjustment and high-speed rotation.

[0004] The utility model also provides an oscillating fan with the combined bearing.

[0005] The combined bearing according to the utility model comprises:

[0006] The rolling assembly comprises an inner ring and a middle ring, wherein the middle ring is arranged around the inner ring and is rollingly connected with the inner ring;

[0007] An outer ring assembly is rotatably sleeved on the middle ring, and the outer ring assembly and the middle ring are in spherical sliding fit;

[0008] Among them, the outer ring assembly includes a first outer ring and a second outer ring, the first outer ring is provided with a fixing protrusion, the second outer ring is provided with a fixing groove, the fixing protrusion and the fixing groove are press-fitted by interference fit, and the first outer ring and the second outer ring are respectively rotatably connected to the outer walls at both ends of the middle ring.

[0009] The combined bearing according to the utility model has at least the following beneficial effects: it effectively combines the advantages of sliding bearings and rolling bearings, the middle ring and outer ring components are spherical sliding fit, and have a larger self-aligning angle; and the inner ring and middle ring are combined into a structure similar to a rolling bearing, which has the effect of generating less noise during high-speed use; in addition, the first outer ring and the second outer ring are subjected to interference fit by a press-in method, so that the middle ring, the first outer ring and the second outer ring are assembled, the assembly is efficient and convenient, and the production cost is reduced.

[0010] According to the combined bearing of the utility model, the fixing groove extends and is connected along the center line direction of the second outer ring, and the fixing protrusion is arranged corresponding to the fixing groove.

[0011] According to the combined bearing of the utility model, the fixing protrusion is arranged on the outer wall of the first outer ring, and the fixing groove is arranged on the outer wall of the second outer ring.

[0012] According to the combined bearing described in the utility model, the first outer ring is connected to the lower part of the middle ring, the second outer ring is connected to the upper part of the middle ring, the fixing protrusion is protruding upward from the first outer ring, and the fixing groove is arranged on the lower wall of the second outer ring.

[0013] According to the combined bearing described in the utility model, an oil filling groove is formed between the inner side wall of the first outer ring, the inner side wall of the second outer ring and the outer wall of the middle ring, and the oil filling groove is used to contain lubricating oil to lubricate the outer wall of the middle ring.

[0014] According to the combined bearing of the utility model, the oil filling groove extends and is connected along the center line direction of the outer ring assembly.

[0015] According to the combined bearing of the utility model, the oil filling groove has a first oil guiding surface, and the first oil guiding surface is arranged on the inner side wall of the first outer ring.

[0016] According to the combined bearing of the utility model, the first oil guide surface has a rounded structure.

[0017] According to the combined bearing of the utility model, the thickness of the rolling component is equal to the thickness of the outer ring component, and the maximum outer diameter of the first outer ring is equal to the maximum outer diameter of the second outer ring.

[0018] The oscillating fan according to the utility model comprises the combined bearing according to the utility model.

[0019] The oscillating fan according to the utility model has at least the following beneficial effects: it effectively combines the advantages of sliding bearings and rolling bearings, the middle ring and outer ring components are spherical sliding fits, and have a larger self-aligning angle; and the inner ring and middle ring are combined into a structure similar to a rolling bearing, which has the effect of generating less noise during high-speed use; in addition, the first outer ring and the second outer ring are interference fit by pressing into the middle ring, and the first outer ring and the second outer ring are assembled, the assembly is efficient and convenient, and the production cost is reduced, and the oscillating fan generates less noise when the air is discharged at high speed.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of a combined bearing according to an embodiment of the utility model;

[0023] Figure 2 An exploded view of a combined bearing according to an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the overall structure of the combined bearing according to an embodiment of the utility model.

[0025] Description of Figure Numbers:

[0026] Rolling assembly 100; inner ring 110; middle ring 120;

[0027] Outer ring assembly 200; oil filling groove 201; first oil guide surface 2011; second oil guide surface 2012; first outer ring 210; fixing protrusion 211; second outer ring 220; fixing groove 2201. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The oscillating fan can blow air to the annular area. In the related art, the motor shaft of the oscillating fan motor needs to realize both the swinging and shaking function at a certain angle and the self-rotating air outlet function. Among them, the motor shaft of the oscillating fan and the outer shell of the oscillating fan are matched with a joint bearing, and the joint bearing and the outer shell of the oscillating fan are spherically matched. A through hole is opened in the middle of the joint bearing, and the motor shaft of the oscillating fan is penetrated through the through hole to extend out of the outer shell and fixed with the fan blades. However, the joint bearing is not suitable for use in high-speed rotation, and the noise generated by the oscillating fan is large when used. In some related technologies, the motor shaft of the oscillating fan and the outer shell of the oscillating fan are matched with rolling bearings, which are suitable for use in high-speed rotation. However, the rolling bearing does not have the function of self-aligning swing, and the blowing area of ​​the oscillating fan is narrow. In some related technologies, the combined bearing includes an outer ring, a middle ring and an inner ring connected in sequence, and the principle of thermal expansion and contraction is used for assembly. It is necessary to heat the parts with larger assembly dimensions or use liquid nitrogen to cool the parts with smaller assembly dimensions. The requirements for equipment are high and the assembly cost is high; and it is not convenient to inject lubricating oil inside, and the lubricity of rotation is poor.

[0034] For this reason, Figures 1 to 3As shown, the combined bearing proposed by the utility model includes a rolling assembly 100 and an outer ring assembly 200 that is slidably matched with the rolling assembly 100, wherein the rolling assembly 100 includes an inner ring 110 and a middle ring 120, wherein the middle ring 120 is arranged around the inner ring 110 and is in rolling connection with the inner ring 110, and reference can be made to the matching structure of the rolling bearing. For example, a rolling element and a retainer are arranged between the inner ring 110 and the middle ring 120, wherein the inner ring 110 is mounted on the journal and rotates with the shaft, and the rolling element is the core element of the rolling bearing, which bears the load and realizes rolling, and the shape, size and number of the rolling element determine the load bearing capacity and high-speed operation performance of the bearing. Common rolling elements include balls. The retainer evenly separates the rolling elements to avoid friction, while guiding the rolling elements to rotate and improving the lubrication performance inside the bearing. The sealing method of the inner ring 110 and the middle ring 120 can also refer to the sealing method of the rolling bearing, which may include accessories such as seals and lubricants to provide better performance and longer service life. Further, the outer ring assembly 200 is rotatably sleeved on the middle ring 120, and the outer ring assembly 200 and the middle ring 120 are spherically slidably matched, which can refer to the matching structure of the sliding bearing. In addition, the outer ring assembly 200 includes a first outer ring 210 and a second outer ring 220, the first outer ring 210 is provided with a fixing protrusion 211, and the second outer ring 220 is provided with a fixing groove 2201. The fixing protrusion 211 and the fixing groove 2201 are press-fitted and interference-fitted, and the first outer ring 210 and the second outer ring 220 are respectively rotatably connected to the outer walls at both ends of the middle ring 120. It should be noted that the commonly used working methods for interference connection are press-fit method and temperature difference method. Among them, press-fitting is assembly by press-fit method, and the press-fit method is provided with thrust by cylinders, hydraulic cylinders, electric cylinders, etc., and can improve the guiding performance when used with a clamp, which is suitable for light and medium interference fit connections in batch production. It is easy to understand that the middle ring 120 and the outer ring assembly 200 are spherical sliding fits, with a large self-aligning angle; the inner ring 110 and the middle ring 120 are combined into a structure similar to a rolling bearing, which has the effect of generating less noise during high-speed use; effectively combining the advantages of sliding bearings and rolling bearings. In addition, the first outer ring 210 and the second outer ring 220 are pressed into an interference fit to achieve the assembly of the middle ring 120, the first outer ring 210 and the second outer ring 220, which is efficient and convenient to assemble and reduces production costs.

[0035] In some embodiments, the connecting end faces of the first outer ring and the second outer ring are respectively provided with corresponding concave and convex structures, and the concave and convex structures are correspondingly engaged when pressed into installation (not shown in the figure). Figure 1 and Figure 2The fixing groove 2201 extends and communicates along the center line direction of the second outer ring 220, and the fixing protrusion 211 is arranged corresponding to the fixing groove 2201, so that the fixing protrusion 211 and the fixing groove 2201 are more convenient to align and install. The first outer ring 210 and the second outer ring 220 are aligned with the center line, and can be installed without considering the rotation angle. Optionally, a guide portion (not shown in the figure) is provided at the end of the fixing protrusion to facilitate the fixing protrusion to enter the fixing groove. For example, a chamfered structure is provided at the end of the fixing protrusion. Further, the fixing protrusion 211 is arranged on the outer wall of the first outer ring 210, and the fixing groove 2201 is arranged on the outer wall of the second outer ring 220. After being pressed in and fixed, the outer walls are fitted, the surface is smooth without grooves, dust is prevented from entering, and the cleaning performance is good. The first outer ring 210 is connected to the lower part of the middle ring 120, the second outer ring 220 is connected to the upper part of the middle ring 120, the fixing protrusion 211 is protruding upward from the first outer ring 210, and the fixing groove 2201 is set on the lower wall of the second outer ring 220, so that the first outer ring 210 and the second outer ring 220 are matched at the opposite end faces, and the first outer ring 210 and the second outer ring 220 are respectively connected to the lower part and the upper part of the middle ring 120, and the rolling assembly 100 cannot fall off after the first outer ring 210 and the second outer ring 220 are interference-fitted. In some assembly applications, the rolling assembly 100 is pre-assembled, and then the rolling assembly 100 is placed in the first outer ring 210, and then the second outer ring 220 is pressed into the first outer ring 210 to complete the assembly. In some assembly applications, the rolling assembly 100 is pre-assembled, and then the rolling assembly 100 is placed into the second outer ring 220, and then the first outer ring 210 is pressed into the second outer ring 220 to complete the assembly.

[0036] Refer to Figure 1 and Figure 2In some embodiments of the present invention, an oil filling groove 201 is formed between the inner side wall of the first outer ring 210, the inner side wall of the second outer ring 220 and the outer wall of the middle ring 120. The oil filling groove 201 is used to contain lubricating oil to lubricate the outer wall of the middle ring 120, effectively reduce the friction of the rolling assembly 100 sliding relative to the outer ring assembly 200, and improve the service life. Specifically, the oil filling groove 201 extends and is connected along the center line direction of the outer ring assembly 200, and can play a lubricating role on the outer peripheral wall of the entire middle ring 120. Furthermore, the oil filling groove 201 has a first oil guide surface 2011, which is arranged on the inner side wall of the first outer ring 210, so as to facilitate the injection of lubricating oil during assembly. In addition, it can also increase the capacity of lubricating oil to a certain extent. In some assembly applications, the first outer ring 210 is placed on a horizontal surface, and the pre-assembled rolling assembly 100 is placed in the first outer ring 210, and then the lubricating oil is injected. For example, the first oil guide surface 2011 is a rounded structure, and when the lubricating oil is injected into the first oil guide surface 2011, the lubricating oil can be guided and driven to accumulate at the bottom of the oil injection groove 201, and then the second outer ring 220 is pressed into the first outer ring 210 for assembly. Finally, the lubricating oil directly lubricates the middle part of the outer peripheral wall of the middle ring 120. In some applications, the maximum eccentric rotation angle of the middle ring 120 relative to the outer ring assembly 200 is 7°, and the eccentric rotation can drive the lubricating oil to be coated on the upper and lower parts of the outer peripheral wall of the middle ring 120, so that when the middle ring 120 slides relative to the first outer ring 210 and the second outer ring 220, the lubricating oil can lubricate the sliding fit. Optionally, the shape of the oil filling groove 201 is a regular symmetrical structure. Specifically, the oil filling groove 201 has a second oil guiding surface 2012 . The second oil guiding surface 2012 is arranged on the inner wall of the second outer ring 220 . The second oil guiding surface 2012 is arranged opposite to the first oil guiding surface 2011 .

[0037] like Figures 1 to 3 As shown, in some embodiments of the present invention, the thickness of the rolling assembly 100 is equal to the thickness of the outer ring assembly 200, and the whole is flat. When the rolling assembly 100 does not rotate eccentrically, the upper end surface and the lower end surface of the rolling assembly 100 are flush with the outer ring assembly 200. In addition, the maximum outer diameter of the first outer ring 210 is equal to the maximum outer diameter of the second outer ring 220. The outer wall after assembly is smooth and beautiful, and it is easy to install and use with an external mounting seat.

[0038] The oscillating fan according to the embodiment of the utility model comprises a combined bearing according to the embodiment of the utility model. By adopting the combined bearing according to the embodiment of the utility model, the advantages of the sliding bearing and the rolling bearing are effectively combined. The middle ring 120 and the outer ring assembly 200 are spherical sliding fits, and have a large self-aligning angle; and the inner ring 110 and the middle ring 120 are combined into a structure similar to a rolling bearing, which has the effect of generating less noise during high-speed use; in addition, the first outer ring 210 and the second outer ring 220 are pressed into an interference fit to achieve the assembly of the middle ring 120, the first outer ring 210 and the second outer ring 220, and the assembly is efficient and convenient, reducing the production cost, and the oscillating fan generates less noise during high-speed operation. It is easy to understand that the blades of the oscillating fan are fixed to the blade connecting shaft. In some applications, the blade connecting shaft is penetrated through the inner ring 110 and fixedly connected to the inner peripheral wall of the inner ring 110, so that the blades have a large deflection angle during operation to realize the oscillating function, and can also perform high-speed self-rotation to realize the blowing function, and there is no direct wear between the external mounting seat, and the noise during operation is small.

[0039] Other structures and operations of the oscillating fan according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0040] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Combined bearing, characterized in that: include: The rolling assembly comprises an inner ring and a middle ring, wherein the middle ring is arranged around the inner ring and is rollingly connected with the inner ring; An outer ring assembly is rotatably sleeved on the middle ring, and the outer ring assembly and the middle ring are in spherical sliding fit; Among them, the outer ring assembly includes a first outer ring and a second outer ring, the first outer ring is provided with a fixing protrusion, the second outer ring is provided with a fixing groove, the fixing protrusion and the fixing groove are press-fitted by interference fit, and the first outer ring and the second outer ring are respectively rotatably connected to the outer walls at both ends of the middle ring.

2. The combined bearing according to claim 1, characterized in that: The fixing groove extends along the center line direction of the second outer ring and is connected, and the fixing protrusion is arranged corresponding to the fixing groove.

3. The combined bearing according to claim 1, characterized in that: The fixing protrusion is arranged on the outer wall of the first outer ring, and the fixing groove is arranged on the outer wall of the second outer ring.

4. The combined bearing according to any one of claims 1 to 3, characterized in that: The first outer ring is connected to the lower part of the middle ring, the second outer ring is connected to the upper part of the middle ring, the fixing protrusion is protruded upward from the first outer ring, and the fixing groove is arranged on the lower wall of the second outer ring.

5. The combined bearing according to claim 1, characterized in that: An oil filling groove is formed between the inner side wall of the first outer ring, the inner side wall of the second outer ring and the outer wall of the middle ring, and the oil filling groove is used to contain lubricating oil to lubricate the outer wall of the middle ring.

6. The combined bearing according to claim 5, characterized in that: The oil filling grooves extend along the center line direction of the outer ring assembly and are connected.

7. The combined bearing according to claim 5 or 6, characterized in that: The oil filling groove has a first oil guiding surface, and the first oil guiding surface is arranged on the inner side wall of the first outer ring.

8. The combined bearing according to claim 7, characterized in that: The first oil guiding surface has a rounded structure.

9. The combined bearing according to claim 1, characterized in that: The thickness of the rolling component is equal to the thickness of the outer ring component, and the maximum outer diameter of the first outer ring is equal to the maximum outer diameter of the second outer ring.

10. Oscillating fan, characterized in that: Comprising the combined bearing according to any one of claims 1 to 9.

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