Miniature ball bearing

Abstract

The utility model provides a miniature ball bearing, which comprises an outer ring, an inner ring, a gasket and a plurality of rollers, a raceway for filling the plurality of rollers is formed between the outer ring and the inner ring, and the inner ring comprises a first extension part and a second extension part which are respectively positioned at two axial ends of the inner ring. The first extension portion is provided with an annular groove portion and an end face, the gasket comprises a matching groove and an abutting face which are arranged on the annular groove portion in a sleeved mode, the annular groove portion and the matching groove portion are provided with a protruding block and a clamping groove which can form limiting respectively, the end face and the abutting face are matched in an abutting mode, and the second extension portion is arranged in an axial extension mode. Aiming at the defects in the prior art, the utility model provides the miniature ball bearing which is convenient to install and can prevent grinding objects from entering the bearing.

Description

Technical Field

[0001] The utility model relates to the field of bearings, in particular to the field of miniature ball bearings. Background Art

[0002] Bearings are important components used for the rotational support of mechanical bodies. Bearings are widely used in various fields of our lives and work. Among them, miniature ball bearings are commonly used in micro motors, office machinery and other scenarios. The miniature ball bearings in the prior art usually include an outer ring, an inner ring and several rollers. A raceway for the rollers is formed between the outer ring and the inner ring. As needed, dust covers, retaining frames and other components are also provided on the bearings. When installing the miniature ball bearings in the prior art, washers are additionally provided on the shaft for the bearing to be installed. The washers are used to achieve a pre-tightening effect. However, the additional installation of washers increases the installation steps, and during use, the washers are prone to slipping with the inner ring of the bearing, and then the grinding materials between the two enter the bearing, affecting the life of the bearing. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a miniature ball bearing which is easy to install and prevents grinding objects from entering the bearing.

[0004] To achieve the above-mentioned purpose, the utility model provides a miniature ball bearing, comprising an outer ring, an inner ring, a washer and a plurality of rollers, a raceway for filling the plurality of rollers is formed between the outer ring and the inner ring, the inner ring comprises a first extension portion and a second extension portion respectively located at its axial ends, the first extension portion is provided with an annular groove portion and an end face, the washer comprises a mating groove and an abutting surface sleeved on the annular groove portion, the annular groove portion and the mating groove portion are respectively provided with a protrusion and a slot that can form a limit, the end face and the abutting surface are abutted and fitted, and the second extension portion is extended axially.

[0005] The advantage of adopting the above technical solution is that by respectively arranging the first extension part and the second extension part at the two axial ends of the inner ring, and extending the second extension part circumferentially, the second extension part can directly replace the gasket and better cooperate with the equipment. On this basis, an annular groove part and an end face are provided at the first extension part, and a matching groove and an abutting surface are provided on the gasket, so that the annular groove part is sleeved on the matching groove, and the protrusions and the grooves on the two form a limit for the two, and then the end face and the abutting surface are abutted, which on the one hand enhances the bonding between the two and reduces slippage between the two. On the other hand, through the cooperation between the annular groove part and the matching groove, the abutting surfaces of the two are shielded to prevent the grinding materials generated by the slippage of the two from entering the interior of the bearing.

[0006] The utility model can be further configured to include a retaining frame and a dust cover, wherein the retaining frame is used to form interval guidance for a plurality of rollers, and the retaining frame body is arranged on one side of the raceway close to the second extension portion, and the dust cover is embedded on the other side of the outer ring corresponding to the raceway.

[0007] Through further settings, a retaining frame and a dust cover are provided, so that the retaining frame forms a spacing guide for the roller, and the retaining frame body is provided on one side corresponding to the second extension portion, while the dust cover is embedded on the other side, which can better cope with the situation where the space is small and only one side of the equipment needs to be protected.

[0008] The utility model can be further configured as follows: the gasket includes a shielding portion, the dust cover and the inner ring are gap-matched, the radial height of the shielding portion is greater than the radial height of the inner ring, and the shielding portion shields the outside of the gap between the dust cover and the inner ring.

[0009] By further setting up, a shielding part is provided on the gasket. When the dust cover and the inner ring are matched to ensure the starting torque, the shielding part blocks the gap between the dust cover and the inner ring to ensure a better sealing effect.

[0010] The utility model can be further configured as follows: an assembly groove for embedding the retaining frame is provided on the outer ring, and a retaining spring which is pressed against the dust cover is provided in the assembly groove.

[0011] By further setting, an assembly groove for the retainer to be embedded is provided on the outer ring, and a clamping spring pressed on the dust cover is provided in the assembly groove to ensure the connection strength of the retainer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 For the embodiment of the utility model Figure 1 Enlarged view of part a;

[0014] Figure 3 For the embodiment of the utility model Figure 1 Enlarged view of part b;

[0015] Among them: outer ring 1; assembly groove 11; retaining spring 12; inner ring 2; first extension portion 21; end face 211; second extension portion 22; annular groove portion 23; protrusion 231; roller 3; washer 4; matching groove 41; retaining groove 411; abutment surface 42; shielding portion 43; retainer 5; dust cover 6. DETAILED DESCRIPTION

[0016] The utility model is a miniature ball bearing. Figure 1-3As shown: it includes an outer ring 1, an inner ring 2, several rollers 3 and a washer 4. A raceway for several rollers is formed between the outer ring 1 and the inner ring 2. The inner ring 2 includes a first extension portion 21 and a second extension portion 22 respectively located at its axial ends. The first extension portion 21 is provided with an annular groove portion 23 and an end face 211. The washer 4 includes a matching groove 41 and an abutment surface 42 sleeved on the annular groove portion 23. The annular groove portion 23 and the matching groove 41 are respectively provided with a protrusion 231 and a card groove 411 that can form a limit. The end face 211 and the abutment surface 42 are abutted and matched, and the second extension portion 22 is extended axially.

[0017] It also includes a retainer 5 and a dust cover 6. The retainer 5 is used to form a spaced guide for the rollers 3, and the retainer 5 is arranged on one side of the raceway close to the second extension portion 22. The dust cover 6 is embedded in the other side of the outer ring 1 corresponding to the raceway.

[0018] The gasket 4 includes a shielding portion 43, and the dust cover 6 is gap-fitted with the inner ring 2. The radial height of the shielding portion 43 is set to be greater than the radial height of the inner ring 2, and the shielding portion 43 is shielded on the outside of the gap between the dust cover 6 and the inner ring 2.

[0019] The outer ring 1 is provided with an assembly groove 11 for the retainer to be embedded in, and a retaining spring 12 is provided in the assembly groove 11 to be pressed against the dust cover 6.

[0020] The above example is only one preferred specific example of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A miniature ball bearing comprising an outer ring, an inner ring, a washer, and a plurality of rollers, wherein a raceway for the plurality of rollers is formed between the outer ring and the inner ring, and characterized in that: The inner ring includes a first extension portion and a second extension portion located at its two axial ends respectively, the first extension portion is provided with an annular groove portion and an end face, the gasket includes a mating groove and an abutment surface mounted on the annular groove portion, the annular groove portion and the mating groove portion are respectively provided with a protrusion and a slot that can form a limit, the end face and the abutment surface are abutted and fitted, and the second extension portion is extended axially.

2. The miniature ball bearing according to claim 1, wherein: It includes a retainer and a dust cover. The retainer is used to form interval guidance for a plurality of rollers, and the retainer frame is arranged on one side of the raceway close to the second extension portion, and the dust cover is embedded on the other side of the outer ring corresponding to the raceway.

3. The miniature ball bearing according to claim 2, characterized in that: The gasket includes a shielding portion, the dust cover and the inner ring are gap-fitted, the radial height of the shielding portion is greater than the radial height of the inner ring, and the shielding portion shields the outside of the gap between the dust cover and the inner ring.

4. The miniature ball bearing according to claim 1, 2 or 3, characterized in that: The outer ring is provided with an assembly groove for embedding the retaining frame, and the assembly groove is provided with a clamping spring which is pressed on the dust cover.

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