Miniature bearing

Abstract

The utility model discloses a miniature bearing which comprises a bearing outer ring, a bearing ball and a bearing inner ring, and the bearing ball is limited in a rolling cavity between the inner wall of the bearing outer ring and the outer wall of the bearing inner ring; the retainer comprises a first retainer body and a second retainer body, a plurality of first retaining grooves are formed in the first retainer body in a bent mode, a plurality of second retaining grooves matched with the first retaining grooves are formed in the second retainer body in a bent mode, and retaining cavities for bearing balls are formed between the first retaining grooves and the second retaining grooves. The radian of the first retaining groove is smaller than that of the bearing ball, and the radian of the second retaining groove is smaller than that of the bearing ball. Compared with the prior art, the bearing retainer has the advantages that the structure is simple, the first retainer and the second retainer are matched with the bearing balls, the friction contact area of the bearing balls is reduced, the friction loss is reduced, and the rotation effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a miniature bearing. Background Art

[0002] Bearings are the supports of shafts and are the components that play a supporting role. Bearings are important basic components widely used in various types of machinery. Miniature bearings with an outer diameter of less than or equal to 10 mm are also widely used in the throttle of automobile exhaust emission systems. The flexibility of miniature bearing operation is mainly determined by the assembly relationship between the components and the roughness of the groove. The existing bearing balls are mostly in arc contact with the inner wall of the outer ring of the bearing and the inner ring of the bearing, with a large contact area and inconvenient assembly. Therefore, it is very important to obtain a dangerous bearing that overcomes the above defects. Utility Model Content

[0003] In order to solve at least one of the above technical problems, the utility model provides a miniature bearing, comprising a bearing outer ring, a bearing ball and a bearing inner ring, wherein the bearing ball is confined in a rolling cavity between the inner wall of the bearing outer ring and the outer wall of the bearing inner ring;

[0004] It also includes a retaining frame, which includes a first retaining frame and a second retaining frame, the first retaining frame is bent with a plurality of first retaining grooves, the second retaining frame is bent with a plurality of second retaining grooves that cooperate with the first retaining grooves, a retaining cavity for a bearing ball is formed between the first retaining groove and the second retaining groove, the curvature of the first retaining groove is smaller than the curvature of the bearing ball, and the curvature of the second retaining groove is smaller than the curvature of the bearing ball.

[0005] Through the above technical solution, a retaining cavity for the bearing ball is formed between the first retaining groove and the second retaining groove; the curvature of the first retaining groove is smaller than the curvature of the bearing ball, and the curvature of the second retaining groove is smaller than the curvature of the bearing ball, that is, the bearing ball has only one contact point with the first retaining groove and the second retaining groove respectively, which can reduce the contact surface, reduce contact friction, and ensure its rotation accuracy.

[0006] The curvature of the first retaining groove is equal to the curvature of the second retaining groove, or the curvature of the first retaining groove is smaller than or larger than the curvature of the second retaining groove.

[0007] Among them, a preferred manner is that the curvature of the first retaining groove is equal to the curvature of the second retaining groove, thereby ensuring the uniformity of the clamping force of the first retaining frame and the second retaining frame on the bearing balls.

[0008] A first mounting protrusion is provided between two adjacent first retaining grooves, and a second mounting protrusion is provided between two adjacent second retaining grooves. The first mounting protrusion and the second mounting protrusion are matched and fixed.

[0009] The first mounting protrusion and the second mounting protrusion are integrally formed. Or the first mounting protrusion is provided with a plurality of first wedge-shaped grooves, the second mounting protrusion is provided with a plurality of second wedge-shaped grooves matching the first wedge-shaped grooves, and the first retaining frame and the second retaining frame are fixed by fasteners.

[0010] As a preferred embodiment of the above, a first notch is provided on the first retaining groove or the second retaining groove so that the wall of the first retaining groove forms an elastic arm.

[0011] Through the above technical solution, the provision of the elastic arm can facilitate the bearing ball to be inserted into the retaining frame.

[0012] The material of the cage is an existing material, such as steel.

[0013] Wherein, the front side and the rear side of the inner ring of the bearing are both provided with inclined surfaces for easy installation, and a clamping area is formed between the two inclined surfaces, and the cross section of the clamping area is a polygon.

[0014] Compared with the prior art, the utility model has the advantages that: the utility model has a simple structure, the first retainer and the second retainer of the utility model cooperate with the bearing balls, reducing the friction contact area of ​​the bearing balls, reducing friction loss, and increasing the rotation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the cross section at AA;

[0017] Figure 3 for Figure 2 A schematic cross-sectional view of another embodiment;

[0018] Figure 4 for Figure 2 A cross-sectional schematic diagram of another embodiment;

[0019] Figure 5 This is a schematic diagram of the cross section of the inner ring of the bearing of the utility model;

[0020] Figure 6 It is a side view of the inner ring of the bearing of the utility model;

[0021] Reference numerals:

[0022] 101 bearing outer ring; 102 bearing ball; 103 bearing inner ring;

[0023] 2 retaining frame; 201 first retaining frame; 202 second retaining frame; 203 first retaining groove; 204 second retaining groove; 205 retaining cavity; 207 first mounting protrusion; 208 second mounting protrusion; 209 first wedge-shaped groove; 210 second wedge-shaped groove; 211 first notch;

[0024] 301 inclined surface; 302 clamping area; 303 polygon. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention and to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, and the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of implementation of the present invention.

[0026] Referring to the accompanying drawings, the utility model adopts the following technical solution: a miniature bearing, comprising a bearing outer ring 101, a bearing ball 102 and a bearing inner ring 103, wherein the bearing ball 102 is confined in a rolling cavity between the inner wall of the bearing outer ring 101 and the outer wall of the bearing inner ring 103;

[0027] It also includes a retaining frame 2, which includes a first retaining frame 201 and a second retaining frame 202. The first retaining frame 201 is bent with a plurality of first retaining grooves 203, and the second retaining frame 202 is bent with a plurality of second retaining grooves 204 that cooperate with the first retaining grooves 203. A retaining cavity 205 for the bearing ball 102 is formed between the first retaining grooves 203 and the second retaining grooves 204. The curvature of the first retaining groove 203 is smaller than the curvature of the bearing ball 102, and the curvature of the second retaining groove 204 is smaller than the curvature of the bearing ball 102.

[0028] Through the above technical solution, a retaining cavity 205 for the bearing ball 102 is formed between the first retaining groove 203 and the second retaining groove 204; the curvature of the first retaining groove 203 is smaller than the curvature of the bearing ball 102, and the curvature of the second retaining groove 204 is smaller than the curvature of the bearing ball 102, that is, there is only one contact point between the bearing ball 102 and the first retaining groove 203 and the second retaining groove 204, respectively, which can reduce the contact surface, reduce contact friction, and ensure its rotation accuracy.

[0029] The curvature of the first retaining groove 203 is equal to the curvature of the second retaining groove 204 . Or the curvature of the first retaining groove 203 is smaller than or larger than the curvature of the second retaining groove 204 .

[0030] Among them, a preferred manner is that the curvature of the first retaining groove 203 is equal to the curvature of the second retaining groove 204, so as to ensure the uniformity of the clamping force of the first retaining frame 201 and the second retaining frame 202 on the bearing ball 102.

[0031] A first mounting protrusion 207 is provided between two adjacent first retaining grooves 203 , and a second mounting protrusion 208 is provided between two adjacent second retaining grooves 204 . The first mounting protrusion 207 and the second mounting protrusion 208 are matched and fixed.

[0032] The first mounting protrusion 207 and the second mounting protrusion 208 are integrally formed. Alternatively, the first mounting protrusion 207 is provided with a plurality of first wedge-shaped grooves 209, and the second mounting protrusion 208 is provided with a plurality of second wedge-shaped grooves 210 that match the first wedge-shaped grooves 209, and the first retaining frame 201 and the second retaining frame 202 are fixed by fasteners.

[0033] As a preferred embodiment, a first notch 211 is formed on the first retaining groove 203 or the second retaining groove 204 so that the wall of the first retaining groove 203 forms an elastic arm.

[0034] Through the above technical solution, the provision of the elastic arm can facilitate the bearing ball 102 to be inserted into the retaining frame 2.

[0035] The material of the retaining frame 2 is an existing material, such as steel.

[0036] The front and rear sides of the bearing inner ring 103 are both provided with inclined surfaces 301 for easy installation. A clamping area 302 is formed between the two inclined surfaces 301 , and the cross section of the clamping area 302 is a polygon 303 .

[0037] Compared with the prior art, the advantages of the present invention are: the present invention has a simple structure, the first retainer 201 and the second retainer 202 of the present invention cooperate with the bearing ball 102 to reduce the friction contact area of ​​the bearing ball 102, reduce friction loss, and increase the rotation effect.

[0038] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A miniature bearing, characterized in that: It comprises a bearing outer ring (101), a bearing ball (102) and a bearing inner ring (103), wherein the bearing ball (102) is confined in a rolling cavity between the inner wall of the bearing outer ring (101) and the outer wall of the bearing inner ring (103); The invention also comprises a retaining frame (2), wherein the retaining frame (2) comprises a first retaining frame (201) and a second retaining frame (202), wherein the first retaining frame (201) is bent with a plurality of first retaining grooves (203), and the second retaining frame (202) is bent with a plurality of second retaining grooves (204) that cooperate with the first retaining grooves (203), wherein a retaining cavity (205) for the bearing ball (102) is formed between the first retaining groove (203) and the second retaining groove (204), wherein the curvature of the first retaining groove (203) is smaller than the curvature of the bearing ball (102), and the curvature of the second retaining groove (204) is smaller than the curvature of the bearing ball (102).

2. The miniature bearing according to claim 1, characterized in that: The curvature of the first retaining groove (203) is equal to the curvature of the second retaining groove (204).

3. The miniature bearing according to claim 1, characterized in that: The curvature of the first retaining groove (203) is smaller than or larger than the curvature of the second retaining groove (204).

4. The miniature bearing according to claim 1, characterized in that: A first mounting protrusion (207) is provided between two adjacent first retaining grooves (203), and a second mounting protrusion (208) is provided between two adjacent second retaining grooves (204), and the first mounting protrusion (207) and the second mounting protrusion (208) are matched and fixed.

5. The miniature bearing according to claim 4, characterized in that: The first mounting protrusion (207) and the second mounting protrusion (208) are integrally formed.

6. The miniature bearing according to claim 4 or 5, characterized in that: A first notch (211) is provided on the first retaining groove (203) or the second retaining groove (204) so ​​that the wall of the first retaining groove (203) forms an elastic arm.

7. The miniature bearing according to claim 4, characterized in that: The first mounting protrusion (207) is provided with a plurality of first wedge-shaped grooves (209), the second mounting protrusion (208) is provided with a plurality of second wedge-shaped grooves (210) matching with the first wedge-shaped grooves (209), and the first retaining frame (201) and the second retaining frame (202) are fixed by fasteners.

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