A retainer for an extra-large wire race ball bearing

Abstract

The application discloses a retainer of an extra-large steel wire raceway ball bearing, which comprises a circular retainer body and a plurality of pocket sleeves; the material of the retainer body is a steel plate, and a plurality of pockets are radially and uniformly arranged on the circumferential surface of the retainer body. The material of the pocket sleeve is polyamide resin; the plurality of pocket sleeves are one-to-one correspondingly inserted into the plurality of pockets of the retainer body; the entry end of the outer circumferential surface of the pocket sleeve is provided with a limiting ring, and the exit end of the outer circumferential surface of the pocket sleeve is radially and uniformly provided with a plurality of fan-shaped reverse hooks; the limiting ring and the reverse hooks form an embedding groove, the width of the embedding groove is matched with the thickness of the retainer body; the outer end surface of each reverse hook is a reverse conical surface, so that the plurality of reverse hooks are pressed into the pockets of the retainer body through the reverse conical surface, and are reversely buckled on the inner circumferential surface of the retainer body, and the embedding groove is clamped in the pocket; the inner hole surface of each pocket sleeve is a waist drum-shaped spherical surface, and the diameter of the inner hole surface of the pocket sleeve is larger than the diameter of the rolling ball. The application can effectively reduce the noise of the bearing during operation.

Description

Technical Field

[0001] This invention relates to a cage for an extra-large steel wire raceway ball bearing. Background Technology

[0002] Wire raceway ball bearings used in CT scanners require low noise and low frictional torque under light load conditions. The cage in a wire raceway ball bearing evenly separates the rolling elements, preventing them from colliding with each other, guiding their normal movement, preventing them from falling off, and improving internal lubrication. Excessive noise from wire raceway ball bearings in medical devices can affect the patient's experience. Currently, the cages in wire raceway bearings are made of steel plate, while the rolling balls are made of bearing steel. Direct contact between the balls and the cage during bearing movement inevitably leads to collisions, generating noise. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cage for an extra-large steel wire raceway ball bearing, which can effectively prevent the steel balls from directly contacting the cage and reduce the noise of the bearing during operation.

[0004] The objective of this invention is achieved as follows: a cage for an extra-large steel wire raceway ball bearing, comprising an annular cage body and multiple pocket sleeves; the cage body is made of steel plate, and multiple pockets are radially and evenly distributed along the circumference of the cage body; wherein...

[0005] The pocket sleeve is made of polyamide resin; multiple pocket sleeves are inserted one-to-one into multiple pockets of the retainer body; the outer diameter of the pocket sleeve is adapted to the diameter of the pocket of the retainer body; a limiting ring protrudes outward from the inlet end of the outer peripheral surface of the pocket sleeve, and multiple fan-shaped barbs are radially evenly distributed outward from the outlet end of the outer peripheral surface of the pocket sleeve; a groove is formed between the limiting ring and the barbs, and the width of the groove is adapted to the thickness of the retainer body; the outer end face of each barb is an inverted conical surface, so that multiple barbs are pressed into the pocket of the retainer body from the outer peripheral surface of the retainer body through the inverted conical surface and then snapped onto the inner peripheral surface of the retainer body, and the groove is engaged with the pocket; the inner hole surface of each pocket sleeve is a waist-shaped spherical surface, and the diameter of the inner hole surface of the pocket sleeve is larger than the diameter of the rolling ball.

[0006] In the aforementioned cage of the extra-large steel wire raceway ball bearing, the diameter of the inner bore of the pocket sleeve is 1 mm larger than the diameter of the rolling ball.

[0007] The cage of the aforementioned extra-large steel wire raceway ball bearing has a convex ring at the inlet end of the inner bore surface of the pocket sleeve, the inner diameter of which is smaller than the diameter of the rolling ball.

[0008] The cage of the extra-large steel wire raceway ball bearing of the present invention has the following characteristics:

[0009] It consists of a steel retainer body and a pocket sleeve made of polyamide resin. Pockets are provided in the steel retainer body, and the pocket sleeve is fixed into these pockets. The pocket sleeve is designed to securely snap into the retainer's pockets, preventing direct contact between the rolling steel balls and the steel retainer body. This not only significantly reduces noise but also gives the retainer high strength and rigidity, ensuring that the medical device operates without noise and meets the requirements for quiet operation. Attached Figure Description

[0010] Figure 1 This is a perspective view of the cage of the extra-large steel wire raceway ball bearing of the present invention;

[0011] Figure 1a yes Figure 1 Enlarged view of part A in the middle;

[0012] Figure 1b yes Figure 1 Enlarged view of part B in the middle;

[0013] Figure 2 This is an axial cross-sectional view of the cage of the extra-large steel wire raceway ball bearing of the present invention;

[0014] Figure 3 yes Figure 2 An enlarged view of part A in the image. Detailed Implementation

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Please see Figures 1 to 3 The cage of the extra-large steel wire raceway ball bearing of the present invention includes a cage body 1 and a plurality of pocket sleeves 2.

[0017] The retainer body 1 is circular in shape. The retainer body 1 is formed by rolling a strip of steel plate into a circle and then welding it at the butt joint. Multiple pockets are evenly distributed radially on the circumference of the retainer body 1.

[0018] Multiple pocket sleeves 2 are nested one-to-one in the multiple pockets of the retainer body 1; the pocket sleeves 2 are made of polyamide resin.

[0019] The outer diameter of each pocket sleeve 2 is adapted to the diameter of the pocket of the retainer body 1. A limiting ring 21 protrudes outward from the inlet end of the outer peripheral surface of the pocket sleeve 2, and multiple fan-shaped barbs 22 are radially and evenly distributed outward from the outlet end of the outer peripheral surface of the pocket sleeve 2. A groove 20 is formed between the limiting ring 21 and the barbs 22. The width of the groove 20 is adapted to the thickness of the retainer body 1. The outer end face of each barb 22 is an inverted conical surface, so that multiple barbs 22 are pressed into the pocket of the retainer body 1 from the outer peripheral surface of the retainer body 1 through the inverted conical surface and then inverted onto the inner peripheral surface of the retainer body, and the groove 20 is locked in the pocket, so that the pocket sleeve 2 will not fall out of the pocket.

[0020] The inner surface of each pocket sleeve 2 is a drum-shaped spherical surface obtained by cutting off two spherical caps in parallel with two circular planes of equal diameter. The diameter of the inner surface of the pocket sleeve 2 is 1 mm larger than the diameter of the rolling ball 3, which can reduce the contact and heat generation between the rolling ball 3 and the pocket sleeve 2 during bearing operation. The inlet end of the inner surface of each pocket sleeve 2 is provided with a protruding ring 23. The inner diameter of the protruding ring 23 is 1 mm smaller than the diameter of the rolling ball 3. It is necessary to press the rolling ball 3 into the inner hole of the pocket sleeve 2 with force so that the rolling ball 3 will not move during bearing operation.

[0021] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the scope of the invention and should be defined by the claims.

Claims

1. A cage for an extra-large steel wire raceway ball bearing, comprising an annular cage body and multiple pocket sleeves; the cage body is made of steel plate, and multiple pockets are radially and evenly distributed along the circumference of the cage body; characterized in that, The pocket sleeve is made of polyamide resin; multiple pocket sleeves are inserted one-to-one into multiple pockets of the retainer body; the outer diameter of the pocket sleeve is adapted to the diameter of the pocket of the retainer body; a limiting ring protrudes outward from the outer circumferential surface of the inlet end of the pocket sleeve, and multiple fan-shaped barbs are radially and evenly distributed outward from the outer circumferential surface of the outlet end of the pocket sleeve; a groove is formed between the limiting ring and the barbs, and the width of the groove is adapted to the thickness of the retainer body; the outer end face of each barb is an inverted conical surface, so that multiple barbs are pressed into the pocket of the retainer body from the outer circumferential surface of the retainer body through the inverted conical surface and then inverted onto the inner circumferential surface of the retainer body, and the groove is engaged with the pocket; the inner hole surface of each pocket sleeve is a waist-shaped spherical surface, and the diameter of the inner hole surface of the pocket sleeve is 1mm larger than the diameter of the rolling ball; a convex ring is provided inward from the inner hole surface of the inlet end of the pocket sleeve, and the inner diameter of the convex ring is 1mm smaller than the diameter of the rolling ball.

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