High-speed mute retainer bearing

Abstract

The utility model discloses a high-speed mute retainer bearing, which is applied to the technical field of bearings, and is characterized in that the high-speed mute retainer bearing comprises an inner ring, an outer ring and a plurality of rolling balls uniformly distributed between the inner ring and the outer ring, and a retainer is arranged between the inner ring and the outer ring; the retainer comprises a retainer base body and pockets evenly distributed in the retainer base body in the circumferential direction, and the inner ring is asymmetrically arranged along shaft shoulders on the two sides of the center line direction. The utility model has the technical effects that the high-speed and low-noise requirements are considered, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a high-speed silent cage bearing. Background Technology

[0002] The cage in a rolling bearing is used to separate the balls during bearing rotation. To enable high-speed bearing operation, there are three main types of cage designs in the existing technology:

[0003] 1. Outer ring guidance: The gap between the outer diameter of the cage and the shoulder of the outer ring is smaller than the gap between the cage and the ball, and the gap between the cage and the shoulder of the inner ring. In this case, the cage can contact the outer ring but not the inner ring during rotation.

[0004] 2. Inner ring guidance: The clearance between the inner diameter of the cage and the inner ring shoulder is smaller than the clearance between the cage and the ball, and the clearance between the cage and the outer ring shoulder. In this case, the cage can contact the inner ring but not the outer ring during rotation.

[0005] 3. Ball-guided cage: The clearance between the cage pocket and the ball is smaller than the clearance between the cage and the outer ring shoulder, and the clearance between the cage and the inner ring shoulder. In this case, the cage will not contact the outer or inner ring.

[0006] However, when using an outer ring for guidance, the bearing can rotate at very high speeds due to lower heat generation, but it is more prone to noise at low speeds due to instability. Using an inner ring for guidance can achieve high speed and low noise operation and is also suitable for high-temperature applications, but it also makes proper lubrication of the inner ring guide groove difficult, which usually requires expensive special lubrication holes in the inner ring. Ball guidance can achieve low noise, but it generates a lot of heat at high speeds, thus limiting the bearing speed. Therefore, it is necessary to design a bearing that can balance high speed and low noise. Utility Model Content

[0007] The purpose of this invention is to provide a high-speed, silent cage bearing, which has the advantages of balancing high speed and low noise requirements while reducing costs.

[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high-speed silent cage bearing, comprising an inner ring, an outer ring, and a plurality of rolling balls evenly distributed between the inner ring and the outer ring, wherein a cage is provided between the inner ring and the outer ring; the cage comprises a cage base and pockets evenly distributed along the circumferential direction on the cage base, and the shoulders of the inner ring on both sides along the center line direction are asymmetrically arranged.

[0009] The present invention is further configured such that: the inner wall and the outer wall of the retainer base are respectively provided with a first U-shaped groove and a second U-shaped groove with opposite opening directions along the circumferential direction, and the pocket is integrally formed based on the first U-shaped groove and the second U-shaped groove.

[0010] The present invention is further configured such that the two side walls of the first U-shaped groove and the second U-shaped groove extend to the two side end faces of the retainer base, respectively.

[0011] The present invention is further configured such that: the pocket has a drum-shaped structure and the pocket has an arc-shaped contact surface corresponding to the position of the rolling ball.

[0012] The present invention is further configured such that: the outer end and the inner end of the pocket are respectively provided with a radially outward flare and a radially inward locking opening, the diameter of the radially inward locking opening is smaller than the diameter of the radially outward flare, and the ball is pressed into the pocket from the radially outward flare.

[0013] The present invention is further configured such that the ratio of the distance CleO between the outer wall of the cage base and the outer ring shoulder and the distance CleI between the inner wall of the cage base and the inner ring shoulder is between 50% and 150%, and satisfies 0.2mm < CleO < 1.0mm and 0.2mm < CleI < 1.0mm.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. By setting the ratio of the gap CleO between the outer wall of the cage base and the outer ring shoulder and the gap CleI between the inner wall of the cage base and the inner ring shoulder to 50%-150%, sufficient space is provided on both sides of the bearing to store lubricating grease during operation, ensuring the normal flow of lubricating grease and thus guaranteeing the lubrication effect of the bearing at high speeds. At the same time, due to centrifugal force and temperature, the cage expands outward under high-speed operation, the gap between the inner and outer rings decreases, and the inner and outer diameters of the cage contact the inner and outer ring shoulders of the bearing, which can effectively limit the vibration of the cage under high-speed operation, control noise, and at the same time, avoid contact with the balls, which can effectively reduce the heat generation of the bearing.

[0016] 2. The inner ring shoulder is asymmetrically designed to ensure that grease can lubricate the raceway at high speeds, thus accommodating the different requirements of cages guided by the outer ring and the inner ring, saving costs caused by different designs and increasing production efficiency. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the overall structure of this embodiment;

[0018] Figure 2 yes Figure 1 Enlarged schematic diagram of part A;

[0019] Figure 3 This is a schematic diagram of the cage structure in this embodiment;

[0020] Figure 4 yes Figure 3 Enlarged diagram of part B.

[0021] Reference numerals: 1. Inner ring; 2. Outer ring; 3. Ball; 4. Cage; 41. Cage base; 42. Pocket; 44. First U-groove; 45. Second U-groove; 46. Radial outward flare; 47. Radial inward locking; 5. Shoulder. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example:

[0024] refer to Figures 1 to 4 A high-speed, silent cage bearing includes an inner ring 1, an outer ring 2, and a plurality of balls 3 evenly distributed between the inner ring 1 and the outer ring 2. A cage 4 is provided between the inner ring 1 and the outer ring 2 to define the position of the balls 3. The cage 4 includes a cage 4 base and pockets 42 evenly distributed along the circumferential direction on the cage 4 base. Meanwhile, the shoulders 5 on both sides of the inner ring 1 along the center line are asymmetrically arranged, with the shoulder 5 on the side closer to the inner wall of the cage 4 base being higher than the shoulder 5 on the other side. This ensures that grease can lubricate the raceway under high-speed bearing conditions, thus accommodating the different requirements of the cage 4 guided by the outer ring 2 and the inner ring 1, thereby saving costs caused by different designs and improving production efficiency. In this embodiment, the ratio of the distance CleO between the outer wall of the cage 4 base and the shoulder 5 of the outer ring 2 and the distance CleI between the inner wall of the cage 4 base and the shoulder 5 of the inner ring 1 is between 50% and 150%, and satisfies 0.2mm < CleO < 1.0mm and 0.2mm < CleI < 1.0mm. This ensures that there is sufficient space on both sides of the bearing to store lubricating grease during operation, so as to ensure the normal flow of lubricating grease and thus ensure the lubrication effect of the bearing at high speed. At the same time, due to centrifugal force and temperature, the cage 4 expands outward under high-speed operation, the gap between the inner and outer rings 2 becomes smaller, and the inner and outer diameters of the cage 4 come into contact with the shoulders 5 of the inner and outer rings 2 of the bearing. This can effectively limit the vibration of the cage 4 under high-speed operation, control the noise, and at the same time, it does not come into contact with the balls, which can effectively reduce the heat generation of the bearing.

[0025] refer to Figures 3 to 4Specifically, the inner and outer walls of the cage 4 base are respectively provided with a first U-shaped groove 44 and a second U-shaped groove 45 with opposite opening directions along the circumferential direction. The pocket 42 is integrally formed based on the first U-shaped groove 44 and the second U-shaped groove 45. The side walls of the first U-shaped groove 44 and the second U-shaped groove 45 extend to the side end faces of the cage 4 base, which facilitates the storage of more lubricating grease, improves the lubrication conditions of the rolling ball 3, reduces the bearing temperature, and reduces slight deformation of the cage 4 body. The pocket 42 has a drum-shaped structure and an arc-shaped contact surface corresponding to the position of the rolling ball 3. The arc-shaped contact surface increases the contact area between the rolling ball 3 and the lubricating oil, while limiting the vibration of the rolling ball 3, avoiding damage to the rolling ball 3 by the pocket 42 during high-speed operation, and avoiding noise. The outer end and inner end of the pocket 42 are respectively provided with a radially outward flare 46 and a radially inward locking opening 47. The diameter of the radially inward locking opening 47 is smaller than the diameter of the radially outward flare 46. The rolling ball 3 is pressed into the pocket 42 from the radially outward flare 46.

[0026] Brief description of operating principle: By setting the ratio of the distance CleO between the outer wall of the cage 4 base and the shoulder 5 of the outer ring 2 and the distance CleI between the inner wall of the cage 4 base and the shoulder 5 of the inner ring 1 to between 50% and 150%, the bearing has sufficient space on both sides to store lubricating grease during operation, ensuring the lubrication effect of the bearing at high speed. At the same time, due to centrifugal force and temperature, the cage 4 expands outward under high-speed operation, the gap between the inner and outer rings 2 decreases, and the inner and outer diameters of the cage 4 come into contact with the shoulders 5 of the inner and outer rings 2 of the bearing. This effectively limits the vibration of the cage 4 under high-speed operation, controls noise, and at the same time, avoids contact with the balls, effectively reducing the heat generation of the bearing.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment that make creative contributions as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A high-speed silent cage bearing, comprising an inner ring (1), an outer ring (2), and a plurality of rolling balls (3) evenly distributed between the inner ring (1) and the outer ring (2), wherein a cage (4) is provided between the inner ring (1) and the outer ring (2); characterized in that, The retainer (4) includes a retainer base (41) and pockets (42) evenly distributed along the circumferential direction on the retainer base (41). The inner ring (1) has shoulders (5) on both sides along the center line direction that are asymmetrically arranged. The shoulder (5) on the side closer to the inner wall of the retainer base (41) is higher than the shoulder (5) on the other side.

2. The high-speed silent cage bearing according to claim 1, characterized in that, The ratio of the distance CleO between the outer wall of the cage base (41) and the shoulder (5) of the outer ring (2) to the distance CleI between the inner wall of the cage base (41) and the shoulder (5) of the inner ring (1) is between 50% and 150%.

3. A high-speed silent cage bearing according to claim 1 or 2, characterized in that, 0.2mm < CleO < 1.0mm and 0.2mm < CleI < 1.0mm.

4. A high-speed silent cage bearing according to claim 1, characterized in that, The inner and outer walls of the retainer base (41) are respectively provided with a first U-shaped groove (44) and a second U-shaped groove (45) with opposite opening directions in the circumferential direction. The pocket (42) is integrally formed based on the first U-shaped groove (44) and the second U-shaped groove (45).

5. A high-speed silent cage bearing according to claim 4, characterized in that, The side walls of the first U-shaped groove (44) and the second U-shaped groove (45) extend to the two side end faces of the cage base (41), respectively.

6. A high-speed silent cage bearing according to claim 1, characterized in that, The pocket (42) has a drum-shaped structure and the pocket (42) has an arc-shaped contact surface corresponding to the position of the rolling ball (3).

7. A high-speed silent cage bearing according to claim 1, characterized in that, The outer end and inner end of the pocket (42) are respectively provided with a radially outward flare (46) and a radially inward locking opening (47). The diameter of the radially inward locking opening (47) is smaller than the diameter of the radially outward flare (46). The ball (3) is pressed into the pocket (42) through the radially outward flare (46).

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