Plastic retainer applicable to ultra-high-speed deep groove ball bearing

Abstract

The utility model discloses a plastic retainer applicable to an ultra-high-speed deep groove ball bearing. Belongs to the technical field of bearing retainers. The deep groove ball bearing plastic retainer mainly solves the problems that the outer side of a pocket of an existing deep groove ball bearing plastic retainer bears large centrifugal force and a large amount of heat can be quickly accumulated when a bearing rotates at an ultra-high speed. The plastic retainer is mainly characterized in that the plastic retainer consists of an inner base, an outer base and pocket units; the pocket units are arranged on the inner base at intervals and are sequentially connected along the circumference of the inner base; an open pocket is formed between every two adjacent pocket units; the inner base is connected with the outer base through the bottoms of the pocket units, and a gap facilitating flowing of a lubricating agent is formed between the inner base and the outer base. The plastic retainer has the advantages that the pockets cannot bear centrifugal force and friction of the steel balls, flowing of lubricating agents is improved, heat dissipation efficiency of the retainer is improved, and the service life of the retainer is prolonged. The plastic retainer is mainly used for ultra-high-speed deep groove ball bearings.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing retainer technical field, specifically a kind of plastic retainer suitable for ultra-high speed deep groove ball bearing. BACKGROUND

[0002] The existing deep groove ball bearing plastic retainer design is mostly steel ball guiding, the retainer pocket can lock the steel ball from the inside and the outside in two directions, but when the bearing rotates at ultra-high speed, the pocket outside will bear large centrifugal force, and the bearing rotation will be unstable, in addition, the steel ball and the pocket are sliding friction, and the existing design pocket is whole circular arc, the steel ball and the pocket are surface contact, and the contact area is large, so that a large amount of heat will be accumulated rapidly when the bearing rotates at high speed, and then the bearing life is affected. SUMMARY

[0003] The utility model discloses a plastic retainer suitable for ultra-high speed deep groove ball bearing to reduce the friction between the retainer and the steel ball, reduce the power loss and the influence on the bearing rotating speed when rotating at high speed.

[0004] The technical solution of the utility model is: a plastic retainer suitable for ultra-high speed deep groove ball bearing, characterized by: the plastic retainer is composed of inner base, outer base and pocket unit; the pocket units are arranged on the inner base in intervals and are connected in sequence along the circumference of the inner base; the open pocket is formed between the adjacent pocket units; the inner base is connected with the outer base through the bottom of the pocket unit, and the gap for lubricant flow is formed between the inner base and the outer base.

[0005] In the technical solution of the utility model, the pocket unit is composed of crossbeam and pocket lock catch arranged symmetrically on both sides of the crossbeam; the inner base is connected with the outer base through the bottom of the pocket lock catch.

[0006] In the technical solution of the utility model, the crossbeam is connected with the inner base and the outer base through crossbeam support.

[0007] In the technical solution of the utility model, the crossbeam support is crossbeam support column.

[0008] In the technical solution of the utility model, the crossbeam support column and the crossbeam support column, and the crossbeam support column and the pocket lock catch form through holes.

[0009] In the technical solution of the utility model, the main part of the pocket unit is installed on the inner base; the thickness of the inner base and the outer base is the same. The thickness of the inner base and the outer base is the same, and the width of the outer base is slightly larger than that of the inner base, that is, the difference between the inner diameter and the outer diameter of the outer base is larger than that of the inner base.

[0010] The plastic retainer adopts outer ring guidance.

[0011] The inner surface of the two pocket locks of the pocket formed between the adjacent pocket units adopts a spherical surface plus a cylindrical surface multi-surface structure, so that the pocket and the steel ball are in linear contact.

[0012] The multi-surface structure of the spherical surface plus the cylindrical surface is sequentially connected with an upper arc, a middle straight section and a lower arc; the width between the middle straight sections of the inner surfaces of the two pocket locks of the pocket unit is slightly greater than the diameter of the steel ball, and after the steel ball is put into the pocket, the gap is 0.2mm-0.3mm.

[0013] The material of the plastic retainer is PEEK material.

[0014] The plastic retainer for the super-high-speed deep groove ball bearing is composed of an inner base, an outer base and a pocket unit, the pocket unit is arranged on the inner base in intervals and is sequentially connected along the circumference of the inner base, the open pockets are formed between the adjacent pocket units, the inner base is connected with the outer base through the bottom of the pocket unit, and the gap for the lubricant to flow is formed between the inner base and the outer base, and the outer base is partially free of the pocket unit, so that the open pockets do not bear the centrifugal force and friction of the steel ball when the bearing rotates at a super-high speed, the heat generation is reduced, the service life of the retainer is increased, the gap between the inner base and the outer base can improve the flow of the lubricant and increase the heat dissipation efficiency of the retainer.

[0015] The plastic retainer for the super-high-speed deep groove ball bearing is composed of an inner base, an outer base and a pocket unit, the pocket unit is arranged on the inner base in intervals and is sequentially connected along the circumference of the inner base, the open pockets are formed between the adjacent pocket units, the inner base is connected with the outer base through the bottom of the pocket unit, and the gap for the lubricant to flow is formed between the inner base and the outer base, and the outer base is partially free of the pocket unit, so that the open pockets do not bear the centrifugal force and friction of the steel ball when the bearing rotates at a super-high speed, the heat generation is reduced, the service life of the retainer is increased, the gap between the inner base and the outer base can improve the flow of the lubricant and increase the heat dissipation efficiency of the retainer. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a structure schematic diagram.

[0017] Figure 2 It is Figure 1 The left view.

[0018] Figure 3 It is Figure 1 The top view.

[0019] Figure 4 It is the pocket unit structure section enlargement schematic diagram of the utility model.

[0020] The figure mark is: 1 - inner base, 2 - outer base, 3 - pocket lock, 4 - crossbeam, 5 - crossbeam support, 6 - upper arc, 7 - middle straight section, 8 - lower arc. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 4 As shown, this utility model discloses an embodiment of a plastic cage suitable for ultra-high speed deep groove ball bearings. The plastic cage consists of an inner base 1, an outer base 2, and a pocket unit. The plastic cage is guided by an outer ring, and the plastic cage material is PEEK material.

[0023] The outer diameter of the inner base 1 of the cage is determined based on the pitch circle diameter of the deep groove ball bearing. The inner diameter of the inner base 1 is calculated. The outer diameter of the outer base 2 is determined based on the inner diameter of the outer ring flange. The inner base 1 and the outer base 2 have the same thickness. The width of the outer base 2 is slightly larger than that of the inner base 1, that is, the difference between the inner and outer diameters of the outer base 2 is greater than the difference between the inner and outer diameters of the inner base 1.

[0024] The pocket unit consists of a crossbeam 4, pocket locks 3 symmetrically arranged on both sides of the crossbeam 4, and a crossbeam support 5 located below the crossbeam 4. The crossbeam support 5 consists of two crossbeam support columns, the bottom of which connects to the inner base 1 and the outer base 2. The upper part of the crossbeam support column and the outer base 2 are connected by an arc, and through holes are formed between the two crossbeam support columns and between the crossbeam support column and the pocket locks 3. The width of the pocket unit is the same as the width of the inner base 1, and the bottom of the pocket extends outward to connect with the outer base 2, with the connection transitioning using an arc. The main body of the pocket unit 3 is mounted on the inner base 1. The outer base 2 does not have pockets; it is connected through the bottom of the pocket unit 3, creating a gap between the inner base 1 and the outer base 2 to facilitate lubricant flow. The pocket units are evenly spaced on the inner base 1 and sequentially connected along the circumference of the inner base 1. Adjacent pocket units are connected by adjacent pocket locks 3 to form an open pocket. The inner surface of the pocket of the adjacent pocket locks 3 adopts a multi-curved surface structure with a spherical and cylindrical surface, so that the pocket and the steel ball are in line contact. The multi-curved surface structure consists of an upper arc 6, a middle straight section 7 and a lower arc 8 connected in sequence. The dimensions of the pocket unit and the parameters of the inner surface of the pocket are determined according to the diameter of the steel ball. The width between the middle straight sections of the inner surfaces of the two pocket locks is slightly larger than the diameter of the steel ball. After the steel ball is put into the pocket, the gap is 0.2mm~0.3mm.

[0025] The cage adopts outer ring guiding, and the upper part of the outer base 2 is an open type without a hole unit, which cannot bear the centrifugal force and friction of the steel ball, helps to reduce heat generation, and increases the service life of the cage. The inner surface of the hole adopts a multi-curved surface combined with a spherical surface plus a cylindrical surface, so that the steel ball and the hole are in line contact, and there is a certain gap between the inner base 1 and the outer base 2 of the cage, which can improve the flow of lubricant and increase the heat dissipation efficiency of the cage. The inner base 1 and the outer base 2 are connected through the hole locking catch 3 and the cross beam support column, and there is a gap between the two bases, which is beneficial to the flow of lubricant and increases the heat dissipation. The two hole units of the cage are connected through the cross beam 4, the lower part of the cross beam 4 is designed as a through hole, two cross beam support columns are designed to connect the cross beam 4 and the outer base 2, which can ensure the strength of the cage while increasing the flow of lubricant and enhancing the heat dissipation. The cage material uses PEEK material, which has higher strength, temperature resistance and wear resistance than nylon.

[0026] The utility model reduces the friction between the cage and the steel ball, reduces the power loss and the influence on the bearing rotating speed when rotating at high speed, carries out lightweight design to the cage, adopts the separate type base, cancels the hole design on the outer base 2, makes the cage no longer bear the centrifugal force from the steel ball when rotating at high speed, designs the through hole between the two holes, increases the flow of lubricant, improves the heat dissipation efficiency of the cage, and at the same time, in order to ensure the strength of the cage, the cross beam support column is designed under the cross beam connecting hole.

[0027] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A plastic cage suitable for ultra-high speed deep groove ball bearings, characterized in that: The plastic retainer consists of an inner base (1), an outer base (2), and pocket units; the pocket units are spaced apart on the inner base (1) and connected sequentially along the circumference of the inner base (1); an open pocket is formed between adjacent pocket units; the inner base (1) is connected to the outer base (2) through the bottom of the pocket units, and a gap is formed between the inner base (1) and the outer base (2) to facilitate the flow of lubricant.

2. The plastic cage for ultra-high speed deep groove ball bearings according to claim 1, characterized in that: The pocket unit consists of a crossbeam (4) and pocket locks (3) symmetrically arranged on both sides of the crossbeam (4); the inner base (1) is connected to the outer base (2) through the bottom of the pocket locks (3) on both sides.

3. A plastic cage for ultra-high speed deep groove ball bearings according to claim 2, characterized in that: The crossbeam (4) is connected to the inner base (1) and the outer base (2) by a crossbeam support (5).

4. A plastic cage for ultra-high speed deep groove ball bearings according to claim 3, characterized in that: The beam support (5) is a beam support column.

5. A plastic cage for ultra-high speed deep groove ball bearings according to claim 4, characterized in that: Through holes are formed between the crossbeam support columns and between the crossbeam support columns and the pocket lock (3).

6. A plastic cage for ultra-high speed deep groove ball bearings according to any one of claims 1-5, characterized in that: The main body of the pocket unit is mounted on the inner base (1); the inner base (1) and the outer base (2) have the same thickness.

7. A plastic cage for ultra-high speed deep groove ball bearings according to claim 6, characterized in that: The plastic retainer is guided by an outer ring.

8. A plastic cage for ultra-high speed deep groove ball bearings according to any one of claims 2-5, characterized in that: The inner surface of the pocket of the two pocket locks (3) forming a pocket between the adjacent pocket units adopts a multi-curved surface structure of spherical and cylindrical surfaces, so that the pocket and the steel ball are in line contact.

9. A plastic cage for ultra-high speed deep groove ball bearings according to claim 8, characterized in that: The multi-curved surface structure consisting of a spherical surface and a cylindrical surface is composed of an upper arc (6), a middle straight section (7), and a lower arc (8) connected in sequence. The width between the middle straight sections of the inner surfaces of the two pockets of the pocket unit is greater than the diameter of the steel ball. After the steel ball is placed in the pocket, the gap is 0.2mm to 0.3mm.

10. A plastic cage for ultra-high speed deep groove ball bearings according to any one of claims 1-5, 7, and 9, characterized in that: The plastic retainer is made of PEEK material.

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