CN216430270U

CN216430270U - Novel four-point contact ball bearing

Info

Publication number: CN216430270U
Application number: CN202123184347.0U
Authority: CN
Inventors: 刘世珍; 李小会; 何延昌; 封萍萍
Original assignee: Luoyang Huigong Bearing Technology Co ltd
Current assignee: Luoyang Huigong Bearing Technology Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-05-03
Anticipated expiration: 2031-12-17

Abstract

The utility model belongs to the technical field of ball bearings for rolling mills, in particular to a novel four-point contact ball bearing, which comprises an outer ring, an inner ring, balls and a retainer, wherein the retainer is arranged between the outer ring and the inner ring, the balls are uniformly distributed between the outer ring and the inner ring through the retainer, and the outer ring and the inner ring are both of an integral structure; the inner circumferential surface of the outer ring is provided with an outer ring channel, the outer circumferential surface of the inner ring is provided with an inner ring channel, and the cross sections of the outer ring channel and the inner ring channel are peach-shaped structures. Through the clearance fit of the outer ring of the four-point contact ball bearing and the external roller and the clearance fit of the inner ring of the four-point contact ball bearing and the roller rotating shaft, the bearing is automatically adaptive to adjust the optimal stress state when being subjected to axial force in the working process, so that the internal stress is weakened to prolong the service life, and the inner ring and the outer ring of the bearing are both arranged into an integral structure, so that the bearing is more convenient to produce and install, and the production cost is reduced.

Description

Novel four-point contact ball bearing

Technical Field

The utility model relates to a ball bearing technical field for the rolling mill specifically is a novel four-point contact ball bearing.

Background

The rolling mill is a device for realizing the metal rolling process, generally refers to equipment for completing the whole process of rolled material production, and the common rolling mill mainly comprises a roller, a frame, a transmission device, a lubricating system, a control system, a roller dismounting device and the like, wherein the roller is usually installed through a four-point contact ball bearing during production.

When being installed, the four-point contact ball bearing for the existing rolling mill is in transition fit or interference fit with the roller and the roller rotating shaft, so that the bearing is subjected to axial force for a long time in the working process, the internal stress of the bearing is overlarge, and the service life of the bearing is short; in addition, the existing four-point contact ball bearing is of a separated double-inner-ring structure or a double-outer-ring structure, and compared with the production and installation of an integral inner ring and an integral outer ring of a common bearing, the four-point contact ball bearing is more complicated, and the production cost is increased.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to overcome current defect, provide a novel four point contact ball bearing, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the novel four-point contact ball bearing comprises an outer ring, an inner ring, balls and a retainer, wherein the retainer is arranged between the outer ring and the inner ring, the balls are uniformly distributed between the outer ring and the inner ring through the retainer, and the outer ring and the inner ring are both of an integral structure; the inner circumferential surface of the outer ring is provided with an outer ring channel, the outer circumferential surface of the inner ring is provided with an inner ring channel, and the cross sections of the outer ring channel and the inner ring channel are peach-shaped structures; the retainer comprises a first retainer and a second retainer, and the first retainer and the second retainer are fixed together through rivets; two sealing end covers are symmetrically arranged at two axial ports between the outer ring and the inner ring.

Furthermore, the inner wall of the outer ring channel and the position where the ball contacts form two symmetrical first contact points, and the inner ring channel and the position where the ball contacts form two symmetrical second contact points, so that the ball forms four-point contact with the bearing through the first contact points and the second contact points.

Further, a first contact angle alpha 1 and a second contact angle alpha 2 are formed between the connecting line of the ball and the first contact point and the second contact point and a bearing radial plane, and the first contact angle alpha 1 and the second contact angle alpha 2 are the same in size.

Further, the inner circumferential surface edge of the outer ring and the outer circumferential surface edge of the inner ring are both provided with sealing grooves for mounting the sealing end cover, so that the sealing end cover is mounted.

Furthermore, one end of each sealing end cover is embedded in the sealing groove of the outer ring, one end of each sealing end cover, which is far away from the outer ring, is in light contact with the inclined surface of the sealing groove of the inner ring, and the number of the sealing end covers is two, so that the sealing end covers are arranged to prevent the leakage of lubricating grease in the cavity between the outer ring channel and the inner ring channel.

Further, the tolerance grade is selected for use to the inner circle hole and is F or G, the tolerance grade is selected for use to the external diameter of outer lane is F or G, so set up the bearing when receiving axial power in the course of the work, because there is the clearance between bearing and outside pivot and the roller, ball automatic adjustment with stress position to best stress state between outer lane channel and the inner circle channel weakens outer lane, inner circle and ball internal stress are in order to increase of service life, and the dismantlement of the outside roller of being convenient for simultaneously is in order to carry out maintenance to it.

Compared with the prior art, the beneficial effects of the utility model are that: the outer ring of the four-point contact ball bearing is in clearance fit with the external roller, and the inner ring of the four-point contact ball bearing is in clearance fit with the roller rotating shaft, so that when the bearing is subjected to axial force in the working process, the ball is automatically adjusted to the optimal stress state with the stress position between the outer ring channel and the inner ring channel, the internal stress of the outer ring, the inner ring and the ball is weakened to prolong the service life, and the external roller is convenient to disassemble to maintain; in addition, the inner ring and the outer ring of the bearing are both arranged into an integral structure, so that the bearing is more convenient to produce and install, the production cost is reduced, and the bearing is suitable for popularization and use.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the scope of the invention (for convenience of description and understanding, the description is given below with the top of fig. 1 being taken as top).

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is an enlarged view of fig. 1A according to the present invention.

In the figure: 1. an outer ring; 2. an inner ring; 3. a ball bearing; 4. a holder; 41. a first holder; 42. a second holder; 5. sealing the end cap; 6. an outer race channel; 61. a first contact point; 7. an inner race channel; 71. a second contact point; 8. and (4) riveting.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a novel four-point contact ball bearing comprises an outer ring 1, an inner ring 2, balls 3 and a retainer 4, wherein the retainer 4 is arranged between the outer ring 1 and the inner ring 2, the balls 3 are uniformly distributed between the outer ring 1 and the inner ring 2 through the retainer 4, and the outer ring 1 and the inner ring 2 are of an integral structure; the inner circumferential surface of the outer ring 1 is provided with an outer ring channel 6, and the outer circumferential surface of the inner ring 2 is provided with an inner ring channel 7; the holder 4 includes a first holder 41 and a second holder 42, the first holder 41 and the second holder 42 being fixed together by a rivet 8; two sealing end covers 5 are symmetrically arranged at two axial ports between an outer ring 1 and an inner ring 2, the cross sections of an outer ring channel 6 and an inner ring channel 7 are peach-shaped structures, two symmetrical first contact points 61 are formed at the positions where the inner wall of the outer ring channel 6 is contacted with balls 3, two symmetrical second contact points 71 are formed at the positions where the inner ring channel 7 is contacted with the balls 3, the arrangement is used for enabling the balls 3 to be in four-point contact with a bearing through the first contact points 61 and the second contact points 71, a first contact angle alpha 1 and a second contact angle alpha 2 are formed between connecting lines of the balls 3 and the first contact points 61 and the second contact points 71 and a radial plane of the bearing, the first contact angle alpha 1 and the second contact angle alpha 2 are the same in size, sealing grooves for installing the sealing end covers 5 are formed at the edge of the inner circumferential surface of the outer ring 1 and the edge of the outer circumferential surface of the inner ring 2, the arrangement is used for installing the sealing end covers 5, one end of each sealing end cover 5 is embedded in the sealing groove of the outer ring 1, one end, far away from the outer ring 1, of each sealing end cover 5 is in light contact with the inclined surface of the sealing groove of the inner ring 2, the number of the sealing end covers 5 is two, the sealing end covers are arranged to prevent leakage of lubricating grease in a cavity between the outer ring channel 6 and the inner ring channel 7, the inner hole of the inner ring is selected to have a tolerance grade of F or G, the outer diameter of the outer ring is selected to have a tolerance grade of F or G, when the bearing is axially stressed in the working process, due to the fact that gaps exist among the bearing, the outer rotating shaft and the roller, the ball 3 automatically adjusts the stress position between the ball 3 and the outer ring channel 6 and the inner ring channel 7 to the optimal stress state, and therefore internal stress of the outer ring 1, the inner ring 2 and the ball 3 is weakened to prolong the service life, and meanwhile, the outer roller is convenient to disassemble to maintain and repair.

When in use: the outer ring 1 of the bearing is in clearance fit with an external roller, the inner ring 2 of the bearing is in clearance fit with a roller rotating shaft, when the bearing is subjected to axial force in the working process, the ball 3 is automatically adjusted to be in an optimal stress state with the stress position between the outer ring channel 6 and the inner ring channel 7, so that the internal stress of the outer ring 1, the inner ring 2 and the ball 3 is weakened to prolong the service life, the ball 3 is in four-point contact with the bearing body through the first contact point 61 and the second contact point 71, the bearing can bear large overturning moment and has high bearing capacity, the bearing is more convenient to produce and install due to the integrally arranged outer ring 1 and the inner ring 2, in addition, the sealing end cover 5 and the outer ring 1 rotate synchronously in the working process, and the leakage of lubricating grease in a cavity between the outer ring channel 6 and the inner ring channel 7 is prevented.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel four-point contact ball bearing is characterized in that: the ball bearing structure comprises an outer ring (1), an inner ring (2), balls (3) and a retainer (4), wherein the retainer (4) is arranged between the outer ring (1) and the inner ring (2), the balls (3) are uniformly distributed between the outer ring (1) and the inner ring (2) through the retainer (4), and the outer ring (1) and the inner ring (2) are of an integral structure; an outer ring channel (6) is formed in the inner circumferential surface of the outer ring (1), an inner ring channel (7) is formed in the outer circumferential surface of the inner ring (2), and the cross sections of the outer ring channel (6) and the inner ring channel (7) are peach-shaped structures; the retainer (4) comprises a first retainer (41) and a second retainer (42), and the first retainer (41) and the second retainer (42) are fixed together through a rivet (8); two sealing end covers (5) are symmetrically arranged at two axial ports between the outer ring (1) and the inner ring (2).

2. The novel four-point contact ball bearing according to claim 1, wherein: the positions where the inner wall of the outer ring channel (6) is in contact with the balls (3) form two symmetrical first contact points (61), and the positions where the inner ring channel (7) is in contact with the balls (3) form two symmetrical second contact points (71).

3. The novel four-point contact ball bearing according to claim 2, wherein: a first contact angle alpha 1 and a second contact angle alpha 2 are formed between the connecting line of the ball (3) and the first contact point (61) and the second contact point (71) and a bearing radial plane, and the first contact angle alpha 1 and the second contact angle alpha 2 are the same in size.

4. The novel four-point contact ball bearing according to claim 1, wherein: the utility model discloses a sealing structure of inner circle, including outer lane (2), inner circle peripheral face edge of outer lane (1) and the outer periphery edge of inner circle (2) has all been seted up and has been supplied the installation the seal groove of end cover (5), the one end of end cover (5) inlay in the seal groove of outer lane (1), end cover (5) are kept away from the one end of outer lane (1) with the seal groove slant of inner circle (2) is the light contact.

5. The novel four-point contact ball bearing according to claim 1, wherein: the number of the sealing end covers (5) is two.

6. The novel four-point contact ball bearing according to claim 1, wherein: the tolerance grade of the inner hole of the inner ring (2) is F or G, and the tolerance grade of the outer diameter of the outer ring (1) is F or G.