Self-aligning ball bearing structure

Abstract

The utility model discloses a self-aligning ball bearing structure, which comprises an inner ring, an outer ring, a retainer and a rolling body, the inner ring is provided with two raceways, the rolling body is a spherical ball, when the self-aligning ball bearing operates, the spherical ball rolls between the inner ring and the outer ring, and sliding friction is replaced by rolling friction, so that the frictional resistance and the energy loss are greatly reduced, and the service life of the self-aligning ball bearing is prolonged. And the machine can operate efficiently. The raceway surface of the outer ring is spherical, the curvature center of the raceway surface is consistent with the center of the bearing, the special design enables the shaft to have an automatic aligning function, and when the bearing is bent or inclined under the action of external force, and the center line of the shaft does not coincide with the center line of the bearing seat, the outer ring can automatically adjust the angle according to the relative position change of the shaft; therefore, the balls can still smoothly roll between the inner ring and the outer ring and cannot be blocked or excessively worn due to deflection of the shaft, so that the stable work of the bearing is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a self-aligning ball bearing structure. Background Art

[0002] In order to avoid errors in parts processing or due to structural needs, self-aligning ball bearings are used in mechanical design to achieve the deflection of the bearing mounting hole and the shaft. Self-aligning ball bearings have two structures: cylindrical hole and tapered hole. The cage is made of steel plate, synthetic resin, etc. Its characteristic is that the outer ring raceway is spherical and has automatic self-aligning properties, which can compensate for errors caused by non-concentricity and shaft deflection.

[0003] Patent application number CN202221421370.9 discloses a self-aligning ball bearing comprising an outer ring, an inner ring, and balls mounted between the outer and inner rings. The outer ring, inner ring, and balls are assembled into a bearing body, and a limiting sleeve is mounted on the outer ring of the bearing body. The limiting sleeve comprises a first ring and a second ring. During use, the self-aligning ball bearing's self-aligning angle is controlled by mounting a limiting sleeve on the outer ring of the self-aligning ball bearing, allowing for manual constraint of the self-aligning angle. This further allows the self-aligning angle of the self-aligning ball bearing to be effectively adapted to mechanical applications and prevent excessively large self-aligning angles. The limiting sleeve is fixed to the outer ring with screws, and the side of the limiting sleeve abuts against the inner ring to control the self-aligning angle of the self-aligning ball bearing. This self-aligning structure requires manual installation of the limiting sleeve and manual constraint, which is cumbersome and prone to errors. Furthermore, untimely alignment can lead to the internal balls becoming stuck or excessively worn due to shaft deflection, hindering the long-term stable operation of the bearing. Utility Model Content

[0004] The utility model aims at solving the technical problems raised in the above background technology and provides a self-aligning ball bearing structure.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a self-aligning ball bearing structure. The self-aligning ball bearing structure includes an outer ring, an inner ring, and a plurality of rolling elements assembled between the outer ring and the inner ring;

[0007] An outer ring raceway is provided on the outer ring, an inner ring raceway is provided on the inner ring, a retainer is provided between the outer ring raceway and the inner ring raceway, and the rolling body rolls between the outer ring raceway and the inner ring raceway along the retainer.

[0008] Preferably, the raceway surface of the outer ring raceway is spherical.

[0009] Preferably, the rolling body is a spherical ball.

[0010] Preferably, a plurality of grooves are evenly provided on the retaining frame, and the grooves are used to separate the spherical balls.

[0011] Preferably, the inner ring raceways are two deep groove ball raceways.

[0012] The positive progress of the present invention is that it provides a self-aligning ball bearing structure, including an inner ring, an outer ring, a retaining cage, and rolling elements. The inner ring is provided with two raceways, and the rolling elements are spherical balls. When the self-aligning ball bearing is in operation, the spherical balls roll between the inner and outer rings, replacing sliding friction with rolling friction, greatly reducing frictional resistance and energy loss, and enabling efficient operation of the machine. The raceway surface of the outer ring is spherical, and its center of curvature is consistent with the center of the bearing. This special design enables the shaft to have a self-aligning function. When the bearing is subjected to external forces and bends or tilts, causing the centerline of the shaft to misalign with the centerline of the bearing seat, the outer ring can automatically adjust its angle according to the relative position change of the shaft, so that the balls can still roll smoothly between the inner and outer rings, and will not get stuck or excessively wear due to the deflection of the shaft, which would affect the stable operation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a self-aligning ball bearing according to an embodiment of the present utility model.

[0014] Figure 2 This is a schematic diagram of the outer ring structure of an embodiment of the present utility model.

[0015] Figure 3 This is a schematic diagram of the inner ring structure of an embodiment of the present utility model.

[0016] Figure 4 This is a schematic diagram of the retaining frame structure of an embodiment of the present utility model.

[0017] Legend: 1. Outer ring; 2. Inner ring; 3. Rolling element; 4. Cage; 11. Outer ring raceway; 22. Inner ring raceway; 41. Groove. DETAILED DESCRIPTION

[0018] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0019] Example 1

[0020] like Figure 1As shown, this embodiment provides a self-aligning ball bearing structure. The self-aligning ball bearing structure includes an outer ring 1, an inner ring 2, rolling elements 3, and a retainer 4. The rolling elements 3 are assembled between the outer ring 1 and the inner ring 2, and are provided with a plurality of rolling elements 3. The outer ring 1 is provided with an outer ring raceway 11, and the inner ring 2 is provided with an inner ring raceway 22. The retainer 4 is provided between the outer ring raceway 11 and the inner ring raceway 22. The rolling elements 3 roll along the retainer 4 between the outer ring raceway 11 and the inner ring raceway 22. Specifically, the rolling elements 3 are spherical balls assembled between the outer ring raceway 11 and the inner ring raceway 22. When the bearing operates, the spherical balls roll between the outer ring raceway 11 and the inner ring raceway 22, replacing the sliding friction of the prior art with rolling friction. This significantly reduces frictional resistance and energy loss, enabling efficient mechanical operation. The rolling motion of the spherical balls enables the bearing to withstand large radial loads. In addition, since the contact area between the spherical balls and the outer ring 1 and the inner ring 2 is small, the heat generated when the shaft rotates at high speed is relatively small, which is conducive to the long-term stable operation of the bearing.

[0021] like Figure 2-3 As shown, in this embodiment, the outer ring raceway 11 has a spherical raceway surface, while the inner ring raceway 22 comprises two deep-groove ball raceways. The center of curvature of the outer ring raceway 11 coincides with the center of the bearing. This unique structural design enables the self-aligning ball bearing to function automatically. When the shaft bends or tilts due to external forces, causing the shaft centerline to misalign with the centerline of the bearing seat, the outer ring 1 automatically adjusts its angle based on the relative position of the shafts, allowing the spherical balls to roll smoothly between the outer ring raceway 11 and the inner ring raceway 22 without becoming stuck or wearing excessively due to shaft deflection. Typically, the bearing will function properly when the centerline of the inner ring 2 relative to the centerline of the outer ring 1 is tilted no more than 1° to 2.5°.

[0022] like Figure 4 As shown, in this embodiment, retainer 4 is evenly distributed with a plurality of grooves 41, which serve to separate the spherical balls. The function of retainer 4 is to evenly separate the spherical balls through the evenly distributed grooves 41, preventing collision and friction between the spherical balls. This not only reduces energy loss and wear, but also ensures that the spherical balls maintain a stable position and trajectory during operation, ensuring the proper functioning of the bearing. Furthermore, retainer 4 guides the rolling direction of the spherical balls, further improving the operating accuracy and efficiency of the bearing.

[0023] This embodiment provides a self-aligning ball bearing structure. This structure includes an inner ring, an outer ring, a retaining cage, and rolling elements. The inner ring is equipped with two raceways, and the rolling elements are spherical balls. When the self-aligning ball bearing is in operation, the spherical balls roll between the inner and outer rings, replacing sliding friction with rolling friction, significantly reducing frictional resistance and energy loss, enabling efficient mechanical operation. The raceway surface of the outer ring is spherical, with its center of curvature aligned with the center of the bearing. This unique design allows the shaft to self-align. When the bearing is subjected to external forces and bends or tilts, causing the centerline of the shaft to misalign with the centerline of the bearing seat, the outer ring automatically adjusts its angle based on the relative position of the shaft, allowing the balls to continue rolling smoothly between the inner and outer rings. This prevents the balls from becoming stuck or excessively worn due to shaft deflection, which could affect the stable operation of the bearing.

[0024] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A self-aligning ball bearing structure, characterized in that: The self-aligning ball bearing structure includes an outer ring, an inner ring, and a plurality of rolling elements assembled between the outer ring and the inner ring; An outer ring raceway is provided on the outer ring, an inner ring raceway is provided on the inner ring, a retainer is provided between the outer ring raceway and the inner ring raceway, and the rolling body rolls between the outer ring raceway and the inner ring raceway along the retainer.

2. The self-aligning ball bearing structure according to claim 1, characterized in that: The raceway surface of the outer ring raceway is spherical.

3. The self-aligning ball bearing structure according to claim 1, characterized in that: The rolling body is a spherical ball.

4. The self-aligning ball bearing structure according to claim 3, characterized in that: The retaining frame is evenly provided with a plurality of grooves, and the grooves are used to separate the spherical balls.

5. The self-aligning ball bearing structure according to claim 1, characterized in that: The inner ring raceways are two deep groove ball raceways.

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