CN108775341B

CN108775341B - Bearing retainer and bearing using same

Info

Publication number: CN108775341B
Application number: CN201810394518.6A
Authority: CN
Inventors: 宁仲; 孙小波; 李建星; 张亭亭; 李江斌; 任乐
Original assignee: Luoyang Bearing Research Institute Co Ltd
Current assignee: Luoyang Bearing Research Institute Co Ltd
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2020-07-24
Anticipated expiration: 2038-04-27
Also published as: CN108775341A

Abstract

The invention relates to a bearing retainer and a bearing using the same. The bearing retainer comprises a retainer body, wherein a plurality of pockets are arranged on the retainer body, the inner walls of the pockets are cylindrical surfaces extending along the radial direction of the retainer body, and guide slideways extending along the circumferential direction of the cylindrical surfaces and used for guiding rolling balls to roll are arranged on the inner walls of the pockets. The arrangement of the guide slide way enables the balls installed in the pockets to roll along the circumferential direction of the bearing retainer only, the play amount of the balls in the bearing is limited, the movement range of the balls is controlled, the balls are prevented from moving along the radial direction of the bearing retainer easily, the rotation precision of the bearing is improved, and the effect of reducing noise generated by collision between the balls and the inner ring and between the balls and the outer ring is achieved. In addition, grease can be added into the guide slide way, so that the friction force of the rolling balls during rolling is reduced.

Description

Bearing retainer and bearing using same

Technical Field

The invention relates to a bearing retainer and a bearing using the same.

Background

The high-speed silent deep groove ball bearing is widely applied to various fields of machinery, instruments, meters, household appliances and the like, has wide application and large consumption, and the retainer is used as one of four large parts of the bearing and is the key for ensuring the silent rotation of the bearing. In order to enable the pocket on the retainer to store more grease and avoid the steel ball and the pocket cambered surface which are arranged in the pocket from generating friction wear, the space in the pocket is not easy to be too small, but the space in the pocket is too large and the steel ball is easy to move in the pocket, so that the steel ball cannot be effectively controlled, and the bearing is prevented from generating a large noise in the rotating process. At present, the quality of developed countries of the mute bearing is obviously superior to that of the countries, and the high-speed mute bearing mainly depends on import, so that the mute bearing urgently needs to solve the problems of noise and precision to meet the domestic requirements.

Chinese utility model patent with granted publication number CN201436416U discloses a ball bearing nylon retainer structure with reinforcing ribs, which is a crown-shaped retainer. The retainer structure is provided with a ball pocket for placing a steel ball, a ball pocket locking opening and a holding claw arranged at the opening of the ball pocket, and the ball pocket locking opening is a cylindrical surface. In addition, an oil groove is formed in the bottom of the ball pocket of the retainer structure, so that the requirement for increasing the grease storage is met under the condition that the pocket space is not changed, and the condition that the rotation is not smooth due to overlarge friction between the retainer and the steel ball in the bearing is avoided.

However, the steel ball in the pocket of the above patent document can only be fixed by the clamping action of the inner ring and the outer ring of the bearing when in use, when the inner ring, the outer ring and the steel ball of the bearing cannot achieve good matching precision, the steel ball is easy to move up and down along the radial direction of the bearing, especially when the bearing rotates at high speed, the bearing can generate great vibration noise and collision noise due to the collision between the steel ball and the inner ring and between the steel ball and the outer ring, in addition, under the action of grease in the oil groove, the friction force of the steel ball in the retainer can be further reduced, the steel ball is easy to generate the offset along the radial direction of the bearing, and the rotation precision of the bearing is not favorable.

Disclosure of Invention

The invention aims to provide a bearing retainer, which is used for solving the technical problems that in the prior art, steel balls are easy to deviate along the radial direction of the retainer, so that the bearing is high in noise and low in rotation precision. The invention also aims to provide a bearing using the bearing retainer.

In order to achieve the purpose, the bearing retainer adopts the following technical scheme:

the bearing retainer comprises a retainer body, wherein a plurality of pockets are arranged on the retainer body, the inner walls of the pockets are cylindrical surfaces extending along the radial direction of the retainer body, and guide slideways extending along the circumferential direction of the cylindrical surfaces and used for guiding rolling balls to roll are arranged on the inner walls of the pockets.

Has the advantages that: the arrangement of the guide slide way enables the balls installed in the pockets to roll along the circumferential direction of the bearing retainer only, the play amount of the balls in the bearing is limited, the movement range of the balls is controlled, the balls are prevented from moving along the radial direction of the bearing retainer easily, the rotation precision of the bearing is improved, and the effect of reducing noise generated by collision between the balls and the inner ring and between the balls and the outer ring is achieved. In addition, grease can be added into the guide slide way, so that the friction force of the rolling balls during rolling is reduced.

The bearing retainer is further improved, two convex rails extending along the circumferential direction of the cylindrical surface are arranged on the inner wall of the pocket, and the two convex rails arranged at intervals form the guide slide way in the pocket. The convex rails are easy to arrange and simple in structure, and a guide slide way capable of guiding the rolling balls to roll is automatically formed between the two convex rails.

The bearing retainer is further improved, the bearing retainer is a crown-shaped retainer, the pocket is an open structure with an elastic locking opening, and two ends of the guide slide way respectively extend to the corresponding elastic locking openings. The guide length of the guide sliding groove is prolonged, and the condition that the rolling stability of the ball is influenced due to the fact that the guide length is short is avoided.

The bearing retainer is further improved, and the two convex rails are respectively arranged at two ends of the cylindrical surface.

The bearing retainer is further improved by further comprising two holding claws for fixing the ball in the pocket, each pocket corresponds to two holding claws, and claw tips of the two holding claws form the elastic locking opening. The holding claw is arranged to facilitate the separation of the retainer from the mold after the injection molding of the retainer.

The bearing retainer is further improved, and the holding claw is provided with a reinforcing rib protruding out of the surface of the holding claw. The arrangement of the reinforcing ribs improves the strength of the holding claw, so that the holding claw is not easy to deform.

The bearing adopts the following technical scheme:

the bearing comprises a bearing inner ring, a bearing outer ring and a bearing retainer, wherein the bearing retainer comprises a retainer body, a plurality of pockets are arranged on the retainer body, the inner walls of the pockets are cylindrical surfaces extending along the radial direction of the retainer body, and guide slide ways extending along the circumferential direction of the cylindrical surfaces and used for guiding rolling balls are arranged on the inner walls of the pockets.

The bearing is further improved, two convex rails extending along the circumferential direction of the cylindrical surface are arranged on the inner wall of the pocket, and the two convex rails arranged at intervals form the guide slide way in the pocket.

The bearing is further improved, the bearing retainer is a crown-shaped retainer, the pocket is an open structure with an elastic locking opening, and two ends of the guide slideway respectively extend to the corresponding elastic locking openings.

In a further improvement of the bearing, the two convex rails are respectively arranged at two ends of the cylindrical surface.

The further improvement of the bearing further comprises holding claws for fixing the ball in the pockets, each pocket corresponds to two holding claws, and claw tips of the two holding claws form the elastic locking port.

The bearing is further improved, and the holding claw is provided with a reinforcing rib protruding out of the surface of the holding claw.

Drawings

Fig. 1 is an overall structural schematic view of embodiment 1 of a bearing cage of the present invention;

FIG. 2 is a schematic cross-sectional illustration of a male rail of embodiment 2 of the bearing cage of the present invention;

FIG. 3 is a schematic cross-sectional illustration of a male rail of embodiment 3 of the bearing cage of the present invention;

in the figure: 1-pocket, 2-holding claw, 3-convex rail, 4-elastic locking notch, 5-lintel structure, 6-concave platform and 7-reinforcing rib.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

Embodiment 1 of the bearing holder of the present invention:

as shown in fig. 1, the bearing holder is a crown-shaped holder made of plastic, and has an annular overall shape and has an inner circumferential surface and an outer circumferential surface. The bearing retainer is including setting up a plurality of pockets 1 above that, and pocket 1 is open type pocket, and each pocket 1 is arranged along the circumference of bearing retainer equally spaced, and the inner wall that forms pocket 1 is the face of cylinder, and the face of cylinder extends along the radial of bearing retainer. The opening of the pocket 1 towards the axial direction of the bearing cage is further provided with two embracing claws 2, each pocket 1 corresponds to two embracing claws 2, and the claw tips of the two embracing claws 2 corresponding to each pocket 1 in the embodiment form an elastic locking opening 4 of the pocket. One side surface of the holding claw 2 is arranged in a coplanar manner with the wall of the pocket hole. The holding claw 2 and the coplanar of the inner wall of the pocket are provided with a guide slideway, the guide slideway is composed of two convex rails 3 arranged along the circumferential direction of the bearing retainer, the two convex rails 3 are respectively arranged at two ends of the cylindrical surface, one of the convex rails extends along the inner circumferential surface of the bearing retainer, and the other convex rail extends along the outer circumferential surface of the bearing retainer. The two ends of the convex rail 3 extend to the elastic locking openings 4 corresponding to the pockets 1, and the two ends of the convex rail 3 extend to the claw tips corresponding to the clasping claws 2. An oil storage area is formed between the two convex rails 3, the oil storage area provides an injection space for the injection of the lubricating grease and avoids the situation that the lubricating grease easily flows out of the retainer, and the lubricating time of the lubricating grease is prolonged to a certain extent. A lintel structure 5 is formed between two adjacent pockets 1 of the slideway, and the lintel structure 5 is a raised part between two adjacent pockets 1. Embrace claw 2 and arrange on lintel structure 5, arranged two on every lintel structure 5 and embraced claw 2, arranged concave station 6 between two armful claws 2 on each lintel structure 5, concave station 6 is isosceles trapezoid in the shape of this embodiment, and isosceles trapezoid's upper base (the base that is the length is shorter) is located the inner peripheral surface of bearing holder. In order to enhance the strength of the holding claws 2, reinforcing ribs 7 are arranged at the middle positions of each holding claw 2, the reinforcing ribs 7 protrude out of the surface of the holding claw 2, and the reinforcing ribs 7 can rebound to the original positions when the holding claws 2 deform, so that the fixing effect on the steel ball can be enhanced, and the steel ball cannot easily separate from the pocket hole 1.

When the bearing retainer in the embodiment is used, the slideway has the function of guiding the balls to rotate along the circumferential direction of the bearing retainer and also has the function of storing grease, so that the balls fixed in the bearing retainer can realize directional rolling and reduce the friction between the balls and the surface of the pocket 1. The technical effects of small heat generation and small friction and wear in the operation of the bearing are achieved, the bearing retainer in the embodiment can still accurately guide the rolling of the ball when the bearing rotates at a high speed, the rotation precision of the bearing is improved, the vibration and the noise of the bearing are reduced, and the service life of the bearing is prolonged.

Embodiment 2 of the bearing holder of the present invention: as shown in fig. 2, the connection between the side of the male rail 3 connected to the pocket wall and the pocket wall may be a smooth connection having a certain curvature.

Embodiment 3 of the bearing holder of the present invention: as shown in fig. 3, the side surface of the convex rail 3 connected to the pocket wall may be connected to the pocket wall by an angle such as a connection in which two planes intersect.

In other embodiments of the bearing cage: the number of the reinforcing ribs on each holding claw can be adjusted according to actual conditions, and the fixing positions of the reinforcing ribs can be arranged at the edges of the holding claws; the shape of the concave station can be a rectangle or an isosceles trapezoid with two sides having a certain radian.

In other embodiments of the bearing cage: one side of the pocket is not provided with an opening, the pocket is a closed pocket, a ring of annular groove is arranged on the wall of the closed pocket, and the annular groove is used for forming a guide slideway for guiding the rotation of the ball.

Embodiments of the bearing of the invention: the bearing comprises a bearing inner ring, a bearing outer ring and a bearing retainer arranged between the bearing inner ring and the bearing outer ring, the specific structure of the bearing retainer is the same as that of the bearing retainer, and the detailed description is omitted here.

Claims

1. The bearing retainer, the bearing retainer is plastic material's coronary cage, including the holder body, be provided with a plurality of pockets on the holder body, the inner wall in pocket is the face of cylinder along the radial extension of holder body, the pocket is provided with towards the opening part of bearing retainer axial direction and embraces the claw, and every pocket corresponds two and embraces claw, its characterized in that: the inner wall of the pocket is provided with a guide slideway which extends along the circumferential direction of the cylindrical surface and is used for guiding the rolling of the balls, two convex rails which extend along the circumferential direction of the cylindrical surface are arranged on the inner wall of the pocket, the two convex rails are respectively arranged at two axial ends of the cylindrical surface, and the two convex rails which are arranged at intervals form the guide slideway in the pocket; the pocket is of an open structure with an elastic locking opening, the claw tips of two corresponding embracing claws on each pocket form the elastic locking opening of the pocket, two ends of the guide slideway respectively extend to the corresponding elastic locking openings, reinforcing ribs protruding out of the surfaces of the embracing claws are arranged in the middle of the embracing claws, the reinforcing ribs are positioned on one side of the embracing claws, which is far away from the convex rails, and the reinforcing ribs are positioned in the middle of the two convex rails; the setting embrace both ends tip on the bearing holder axial direction of claw be root and top respectively, the strengthening rib extends to the top of embracing the claw and the top of protrusion embracing the claw from embracing the root of claw, the strengthening rib is for embracing the bar-shaped structure that claw root portion extended to embracing the claw top from embracing.

2. The bearing, including bearing inner race, bearing inner race and bearing retainer, the bearing retainer is the crown holder of plastics material, the bearing retainer includes the holder body, be provided with a plurality of pockets on the holder body, the inner wall in pocket is the face of cylinder along the radial extension of holder body, the pocket is provided with towards the opening part of bearing retainer axial direction and embraces the claw, and every pocket corresponds two and embraces claw, its characterized in that: the inner wall of the pocket is provided with a guide slideway which extends along the circumferential direction of the cylindrical surface and is used for guiding the rolling of the balls, two convex rails which extend along the circumferential direction of the cylindrical surface are arranged on the inner wall of the pocket, the two convex rails are respectively arranged at two axial ends of the cylindrical surface, and the two convex rails which are arranged at intervals form the guide slideway in the pocket; the pockets are of an open structure with elastic locking openings, the claw tips of the two corresponding embracing claws on each pocket form the elastic locking openings of the pockets, and two ends of the guide slide way respectively extend to the corresponding elastic locking openings; the middle position of the holding claw is provided with a reinforcing rib protruding out of the surface of the holding claw, the reinforcing rib is positioned on one side of the holding claw, which is far away from the convex rails, and the reinforcing rib is positioned in the middle position of the two convex rails; the setting embrace both ends tip on the bearing holder axial direction of claw be root and top respectively, the strengthening rib extends to the tip of embracing the claw and the tip of protrusion embracing the claw from embracing the root of claw, the strengthening rib is for embracing the bar-shaped structure that claw root portion extended to embracing the claw top from embracing.