CN214578327U

CN214578327U - Self-aligning roller bearing

Info

Publication number: CN214578327U
Application number: CN202120079250.4U
Authority: CN
Inventors: 高子华
Original assignee: WUXI ZHENGDA BEARING MACHINERY MANUFACTURING CO LTD
Current assignee: WUXI ZHENGDA BEARING MACHINERY MANUFACTURING CO LTD
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-11-02
Anticipated expiration: 2031-01-07

Abstract

The utility model discloses a self-aligning roller bearing relates to bearing technical field, include: the bearing comprises a bearing outer ring, a bearing inner ring, two rows of rollers and two rows of retainers for supporting the rollers, wherein a middle retainer ring is arranged between the two rows of rollers, corrugated structures are arranged on two side surfaces of the middle retainer ring along the rotation direction of the bearing, and the heights of a plurality of wave crests of the corrugated structures are the same; the utility model discloses well both sides face of well retaining ring sets up the ripple structure along the bearing rotation direction, and the height of each crest of ripple structure is the same for friction between well retaining ring and roller becomes line face friction, has reduced the friction between well retaining ring and roller, and the energy loss that has significantly reduced has prolonged the life of device, and has simple structure, advantage with low costs.

Description

Self-aligning roller bearing

Technical Field

The utility model relates to a bearing technical field especially relates to a self-aligning roller bearing.

Background

Rolling (element) bearings are well known mechanical components used to rotatably support, for example, a shaft or axle in rotating applications. There are different types of rolling (element) bearings, including rollers and/or balls as rolling elements.

One common type of rolling bearing is a self-aligning roller bearing, which is distinguished by the ability to accommodate large loads and also shaft misalignment (/ shaft misalignment). The outer and inner bearing rings are designed such that they can be relatively misaligned with respect to the axis of rotation of the bearing. Self-aligning capability (or self-aligning capability) is achieved by using drum rollers and corresponding raceway surfaces on the outer and inner bearing rings, respectively. The bearing can be designed, for example, as a single-row or double-row roller bearing.

The utility model discloses a utility model patent with application number "201220096232.8", title "self-aligning roller bearing" discloses a self-aligning roller bearing, including bearing inner race and bearing outer race, set up two rows of drum-shaped rollers between them, the roller passes through the holder to be supported, is provided with the middle check ring between two rows of rollers, is used for cooperating the holder to restrict the removal of roller, however, because the existence of middle check ring, can produce the friction between it and roller, the friction mode is face-to-face friction, has greatly reduced the life of roller; the device is provided with the space between sealed lid sealed bearing outer lane and the bearing inner race, pours into lubricating oil into it again and realizes the self-lubricating of bearing, however, because during lubricating oil fluid, receives the influence of gravity, its piles up in the bearing lower part, can not receive the direct lubrication of lubricating oil when the roller moves upper portion, and lubricated effect is relatively poor.

Therefore, a self-aligning roller bearing with a simple structure, reduced friction and good lubrication effect is needed.

Disclosure of Invention

The utility model aims at providing a self-aligning roller bearing to solve the problem that above-mentioned prior art exists, simple structure, reducible friction and lubricated effectual.

In order to achieve the above object, the utility model provides a following scheme: the bearing comprises a bearing outer ring, a bearing inner ring, two rows of rollers and two rows of retainers for supporting the rollers, wherein a middle retainer ring is arranged between the two rows of rollers, corrugated structures are arranged on two side surfaces of the middle retainer ring along the rotation direction of the bearing, and the heights of a plurality of wave crests of the corrugated structures are the same.

Preferably, the distance between several wave crests of the corrugated structure is the same.

Preferably, the length of the corresponding part of the single roller and the middle retainer ring is not shorter than two wavelengths of the corrugated structure.

Preferably, the corrugated structure covers the whole side face of the middle retainer ring.

Preferably, the middle retainer ring is disposed in a space formed by the cage, the rollers, and the bearing inner race.

Preferably, the two rows of rollers are symmetrically distributed, and the two rows of retainers are symmetrically arranged between the bearing outer ring and the bearing inner ring.

Preferably, the bearing comprises two sealing covers for sealing the space between the bearing inner ring and the bearing outer ring, one ends of the two sealing covers are respectively arranged on two sides of the bearing outer ring, and the other ends of the two sealing covers are respectively in contact sealing fit with two sides of the outer surface of the bearing inner ring.

Preferably, a plurality of grooves for disturbing lubricating oil are formed in the upper surface of the bearing inner ring, and the grooves are located between the sealing cover and the retainer.

Preferably, the groove is arranged obliquely to the bearing moving direction.

Preferably, the inner surface of the bearing outer ring is a spherical surface, the arc surface of the inner surface of the bearing outer ring is matched with the surface radian of the roller, two rows of roller tracks are arranged on the outer surface of the bearing inner ring, and the surfaces of the roller tracks are matched with the surface radian of the roller.

The utility model discloses for prior art gain following technological effect:

1. the corrugated structures are arranged on the two side faces of the middle check ring along the rotation direction of the bearing, the corrugated structures change the side faces of the original middle check ring into wave crests which are sequentially arranged one by one from a plane, the heights of the wave crests are the same, the wave crests with the same heights enable straight lines where the vertexes of the wave crests are located to form an annular face which is used as a face in direct contact with the roller, when the annular face formed by the straight lines where the vertexes of the wave crests are located is in contact with the roller, the mode of friction between the annular face and the roller is linear face friction, compared with the face friction in the prior art, the friction between the middle check ring and the roller is greatly reduced, the roller is protected from being damaged by friction in a phase-changing mode, the service life of the roller is prolonged, and the service life of the device is prolonged, and the problem of energy loss caused by large friction is solved.

2. The length of the corresponding part of the roller and the middle check ring is not shorter than two wavelengths of the corrugated structure, the arrangement mode enables the side face of the roller, which is in contact with the middle check ring, to be always in contact with more than two wave crests of the corrugated structure in the moving process of the roller, and the more than two wave crests form a face to support the roller, so that the limiting effect of the middle check ring in the prior art can be realized, and the problem that the roller is likely to deviate when only one wave crest is in contact with the side face of the roller is avoided.

3. The corrugated structure covers the side face of the whole middle check ring, so that the problem of deformation caused by extrusion of the side face of the roller due to small contact area is avoided.

4. Be equipped with the recess that a plurality of is used for disturbing lubricating oil on the upper surface of bearing inner race, the recess is located between sealed lid and the holder, after injecting lubricating oil into the airtight space between bearing inner race and the bearing outer race, the groove that sets up at the bearing inner race is followed bearing inner race synchronous revolution, at rotatory in-process, the recess not only forms the disturbance to lubricating oil, increase the kinetic energy of lubricating oil, make it sputter phenomenon appear, and then permeate to the position that needs the lubrication from each gap, and when not being in the face of the position that does not fill lubricating oil and lubricating oil sputter and can't, the existence of recess makes its inside constantly carry the lubricating oil motion, cooperation centrifugal action, get rid of lubricating oil and lubricate the position that is not lubricated, and then improved the self-lubricating effect of device greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a structural diagram of the self-aligning roller bearing of the present invention;

FIG. 2 is a partial enlarged view of the contact surface between the retainer ring and the roller of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

fig. 4 is a top view of the bearing inner race of the present invention;

wherein, 1, bearing outer ring; 2. a bearing inner race; 3. a roller; 4. a holder; 5. a middle retainer ring; 6. a sealing cover; 7. and (4) a groove.

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 work belong to the protection scope of the present invention.

The utility model aims at providing a self-aligning roller bearing to solve the problem that prior art exists, simple structure, reducible friction and lubricated effectual.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1-2, a self-aligning roller bearing is provided, which includes a bearing outer ring 1, a bearing inner ring 2, two rows of rollers 3, and a retainer 4 for supporting the rollers 3, wherein a middle retainer ring 5 is disposed between the two rows of rollers 3, two side surfaces of the middle retainer ring 5 are provided with a corrugated structure along a bearing rotation direction, the corrugated structure forms a plurality of protrusions, peaks of the plurality of protrusions are peaks of the corrugated structure, the peaks are spatially straight lines, troughs of the corrugated structure can be spatially in any shape such as planes and grooves, heights of the plurality of peaks of the corrugated structure are the same, and the straight lines where the plurality of peaks are located can form an annular surface for contacting the rollers 3.

The distance between the wave crests of the corrugated structure can be adjusted according to the size of the roller 3, so that the roller 3 is ensured to be in contact with the wave crests of the corrugated structure of the middle check ring 5, preferably, the distances between a plurality of wave crests of the corrugated structure are the same, and the length of the corresponding part of the single roller 3 and the middle check ring 5 is not shorter than two wavelengths of the corrugated structure, namely, the roller 3 is in contact with two or more wave crests at any time.

The corrugated structure covers the side face of the whole middle check ring 5, the length of a straight line where a wave crest is located is increased, the contact area of the middle check ring 5 and the roller 3 is increased, and the risk of damaging the roller 3 by stress concentration is reduced.

The middle retainer ring 5 may be disposed in a space formed by the cage 4, the roller 3, and the bearing inner ring 2 or the bearing outer ring 1, and preferably, is disposed in a space formed by the cage 4, the roller 3, and the bearing inner ring 2, so that the manufacturing cost is saved and the injection of the lubricating oil is not blocked.

The two rows of rollers 3 are symmetrically distributed, and the two rows of retainers 4 are symmetrically arranged between the bearing outer ring 1 and the bearing inner ring 2, so that compared with the retainer 4 which protrudes outwards from the space between the bearing outer ring 1 and the bearing inner ring 2, unnecessary space occupation is reduced.

This bearing still includes two sealed lids 6 for the space between sealed bearing inner race 2 and the bearing inner race 1, the one end of two sealed lids 6 sets up respectively in the both sides of bearing inner race 1, the other end respectively with the sealed cooperation of contact of the both sides of 2 surfaces of bearing inner race, the sealed complex mode of contact makes it realize the confined space on the basis of the rotation that does not influence the inner circle, with pouring into lubricating oil in the confined space, realize the self-lubricating of bearing.

As shown in fig. 1, 3 and 4, the lubricating oil can be disturbed by arranging the grooves 7 to improve the lubricating effect, the grooves 7 can be arranged on the bearing inner ring 2 or the retainer 4, preferably, a plurality of grooves 7 are arranged on the upper surface of the bearing inner ring 2, the grooves 7 are arranged between the sealing cover 6 and the retainer 4, when the bearing inner ring 2 rotates, the grooves 7 rotate along with the bearing inner ring 2, and then the lubricating oil in the closed space is disturbed to sputter the lubricating oil and carry the lubricating oil to other positions by using the centrifugal action, so that the multi-point lubrication is realized, and the lubricating effect is improved.

The shape and depth of the groove 7 may be set based on the accuracy of the processing equipment, and may be any shape such as a cylindrical shape, a square shape, or the like.

The grooves 7 can be arranged towards any direction, preferably, the grooves 7 are arranged obliquely towards the bearing moving direction, and when the grooves 7 are arranged obliquely towards the bearing moving direction, the disturbing effect is better.

The number of the grooves 7 can be set according to factors such as actual working conditions and the amount of the lubricating oil which can be injected.

The inner surface of the bearing outer ring 1 is a spherical surface, the cambered surface of the inner surface of the bearing outer ring 1 is matched with the surface radian of the rollers 3, two rows of tracks of the rollers 3 are arranged on the outer surface of the bearing inner ring 2, and the surfaces of the tracks of the rollers 3 are matched with the surface radian of the rollers 3, so that the aligning capability is realized.

In the actual use process, lubricating oil is injected into a closed space formed by the bearing inner ring 2, the bearing outer ring 1 and the sealing cover 6 through the oil injection hole (the oil injection hole is sealed after the lubricating oil is injected), and then the lubricating oil is assembled with the shaft (the assembly and the oil injection can be carried out firstly and then, the specific sequence is not carried out between the two), after the shaft starts to move, the movement of the shaft drives the bearing inner ring 2 to move, the roller 3 rolls in the retainer 4, the roller 3 and the retainer 4 move along the movement direction of the bearing inner ring 2 relative to the bearing inner ring 2, and in the process that the roller 3 moves along the movement direction of the bearing inner ring 2, the side surface of the roller 3 and the middle retainer ring 5 slide relatively to generate friction in a sliding manner, and as the contact surface of the middle retainer ring 5 and the roller 3 is composed of straight lines where a plurality of wave crests are located, line-surface friction is formed, and further the friction between the middle retainer ring 5 and the roller 3 is reduced; in the process of the movement of the bearing inner ring 2, the groove 7 arranged on the bearing inner ring 2 continuously passes through the space filled with the lubricating oil, the shape of the groove 7 per se can disturb the lubricating oil, the kinetic energy of the lubricating oil is increased, the lubricating oil is sputtered, the groove 7 can carry a certain amount of lubricating oil to move with the groove after passing through the space filled with the lubricating oil, in the subsequent movement process, the groove 7 throws the lubricating oil carried in the groove to the position needing lubrication due to the centrifugal effect, and after one circle of movement, the groove 7 enters the space filled with the lubricating oil again to form circulation.

The adaptability that carries out according to actual demand all is in the protection scope of the utility model.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. The utility model provides a self-aligning roller bearing, includes bearing inner race, two rows of rollers and two rows support the holder of roller, its characterized in that is two be listed as set up the well retaining ring in the middle of the roller, be provided with the ripple structure on the bearing direction of rotation on the well retaining ring both sides face, the height of a plurality of crest of ripple structure is the same.

2. Self-aligning roller bearing according to claim 1, characterized in that the distance between several wave crests of the corrugated structure is the same.

3. The self-aligning roller bearing according to claim 2, wherein the length of a portion of a single roller corresponding to the center retainer ring is not shorter than two wavelengths of the corrugated structure.

4. Self-aligning roller bearing according to claim 3, characterized in that the corrugations cover the entire side of the center retainer ring.

5. The self-aligning roller bearing according to claim 1, wherein the center retainer is disposed in a space formed by the cage, the rollers, and the bearing inner race.

6. The self-aligning roller bearing according to claim 1, wherein two rows of the rollers are symmetrically distributed, and two rows of the retainer are symmetrically disposed between the bearing outer race and the bearing inner race.

7. The self-aligning roller bearing according to claim 6, further comprising two sealing covers for sealing a space between the bearing inner race and the bearing outer race, wherein one end of each of the two sealing covers is disposed on both sides of the bearing outer race, and the other end thereof is in contact sealing engagement with both sides of an outer surface of the bearing inner race.

8. The self-aligning roller bearing according to claim 7, wherein a plurality of grooves for disturbing lubricating oil are provided on an upper surface of the bearing inner race, the grooves being located between the seal cover and the cage.

9. Self-aligning roller bearing according to claim 8, characterized in that the grooves are arranged obliquely to the bearing movement direction.

10. The self-aligning roller bearing according to claim 1, wherein the inner surface of the outer bearing ring is a spherical surface, the arc surface of the inner surface of the outer bearing ring matches the surface radian of the rollers, the outer surface of the inner bearing ring is provided with two rows of roller tracks, and the surfaces of the roller tracks match the surface radian of the rollers.