CN210919832U

CN210919832U - Thin-wall bearing for two sets of parallel horizontal installation

Info

Publication number: CN210919832U
Application number: CN201920845452.8U
Authority: CN
Inventors: 石永其; 张国强; 晏伟平
Original assignee: Zhejiang Bairun Bearing Co ltd
Current assignee: Zhejiang Bairun Bearing Co ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-07-03
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses a thin-walled bearing for two sets of parallel horizontal installation, including outer lane, inner circle, rolling element, holder, the rolling element is located between outer lane, inner circle and holder, the holder is symmetrical double-disc structure and two fixed assembly; the retainer adopts an inner guide mode; the width of the inner ring is smaller than that of the outer ring; the groove curvature of the rolling element channel of the outer ring is 0.529-0.539 times of the diameter of the rolling element, the groove curvature of the rolling element channel of the inner ring is 0.5513-0.515 times of the diameter of the rolling element, and the groove curvatures of the rolling element channels of the outer ring and the inner ring are both positive tolerance.

Description

Thin-wall bearing for two sets of parallel horizontal installation

Technical Field

The utility model belongs to the technical field of thin-walled bearing, specifically speaking relate to a thin-walled bearing that is used for two sets of horizontal installation side by side.

Background

The bearing is an important part in the modern mechanical equipment, and the main function of the bearing is to support a mechanical rotating body, reduce the friction coefficient in the movement process of the mechanical rotating body and ensure the rotation precision of the mechanical rotating body. The bearing is composed of six parts, namely an outer ring, an inner ring, a rolling body, a retainer, a seal and lubricating oil.

The widths of an inner ring and an outer ring of the traditional deep groove ball bearing are equal, namely the outer end faces of the inner ring and the outer ring are flush, so that the rotating speed is high, and two sets of bearings are often required to be arranged in parallel under the use environment of bearing high radial load and axial load, however, due to the problem of machining tolerance, when the traditional deep groove ball bearing is used in parallel, a shaft sleeve is often required to be arranged between the two bearings in a matched grinding mode or a deep groove ball bearing manufacturer carries out matched grinding on the used bearings, so that the bearings can be used smoothly; this causes a lot of inconvenience for field use, and for paired bearings, increases the processing cost and cannot be mixed; in addition, for some places with high requirements on bearing installation and small space, the bearing cannot be installed in a mode of grinding the shaft sleeve; in addition, especially for some large-scale production and automatic production equipment, the paired match grinding also increases the burden for the production enterprise, and is not suitable for automatic production.

In addition, the existing bearing dust cover is complex in structure and inconvenient to install, the dust cover can be installed and fixed only by means of a special installation tool, the efficiency of the bearing equipment dust cover is greatly influenced, large gaps are reserved between the dust cover and an outer ring or an inner ring, and the dust-proof effect of the dust cover is greatly influenced by the gaps.

Disclosure of Invention

The utility model aims at providing a thin wall bearing that is used for two sets of horizontal installation side by side, it is anticipated to solve the problem that exists among the background art.

In order to solve the technical problem, the purpose of the utility model is to realize like this:

a thin-wall bearing for two sets of parallel horizontal installation comprises an outer ring, an inner ring, a rolling body and a retainer, wherein the rolling body is positioned between the outer ring, the inner ring and the retainer, and the retainer is of a symmetrical double-piece structure and is fixedly assembled by two pieces;

the retainer adopts an inner guide mode;

the width of the inner ring is smaller than that of the outer ring;

the groove curvature of the rolling element channel of the outer ring is 0.529-0.539 times of the diameter of the rolling element, the groove curvature of the rolling element channel of the inner ring is 0.5513-0.515 times of the diameter of the rolling element, and the groove curvatures of the rolling element grooves of the outer ring and the inner ring are both positive tolerances.

On the basis of the above scheme and as a preferable scheme of the scheme: the rolling bearing is characterized by further comprising dustproof covers, wherein the dustproof covers are symmetrically and fixedly arranged outside the retainer and shield the retainer and the rolling bodies.

On the basis of the above scheme and as a preferable scheme of the scheme: the dustproof cover comprises a dustproof cover body, a positioning portion is fixedly arranged at the upper end of the dustproof cover body, a sealing portion is fixedly arranged at the lower end of the dustproof cover body, annular dustproof cover positioning grooves are symmetrically formed in the inner peripheral surface of the outer ring, close to the outer edges of the two sides of the outer ring, the positioning portion is clamped in the dustproof cover positioning grooves, and the sealing portion is pressed close to the outer peripheral surface of the inner ring.

On the basis of the above scheme and as a preferable scheme of the scheme: the section of the dustproof cover positioning groove comprises a vertical edge and a bevel edge, the upper ends of the vertical edge and the bevel edge are in transition connection through a transition curve, and the bevel edge is close to the outer edge side of the outer ring; the cross section of the positioning part comprises a curled edge, the dustproof cover body comprises a vertical body, the vertical body is connected with the curled edge through a transition edge, and the curled edge is curled inwards; after the dustproof cover is assembled, the curled edge is tightly abutted to the inclined edge, and the vertical body is tightly pressed on the vertical edge.

On the basis of the above scheme and as a preferable scheme of the scheme: the positioning part is discontinuously arranged at the outer edge of the dustproof cover body.

On the basis of the above scheme and as a preferable scheme of the scheme: the sealing part comprises a bent edge, the bent edge is bent towards the direction of the rolling body, and the lower end face of the bent edge is close to the outer peripheral face of the inner ring.

Compared with the prior art, the utility model outstanding and profitable technological effect is: 1. compared with the bearing in the prior art, the bearing can be directly used in pairs, a bearing sleeve does not need to be installed, or the bearings installed in pairs are ground in pairs, so that the bearing is more convenient to install and use and is more convenient to produce automatically.

The dustproof cover is more reasonable in structure and convenient to install.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of an inner ring construction;

FIG. 3 is a schematic view of the outer ring construction;

fig. 4 is a partially enlarged view.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step, based on the given embodiments, fall within the scope of protection of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

A thin-wall bearing for two sets of parallel horizontal installation comprises an outer ring 1, an inner ring 2, a rolling body 3 and a retainer 4, wherein the rolling body 3 is positioned among the outer ring 1, the inner ring 2 and the retainer 4, and the retainer 4 is of a symmetrical double-piece structure and is fixedly assembled by two pieces;

the retainer 4 adopts an inner guide mode; it should be noted that the inner diameter of the retainer 4 is called inner guide when the clearance between the inner diameter and the inner ring 2 is small, the inner ring is a rotating ferrule and provides a rolling body to drag torque when rotating, and if the bearing load is unstable or the load is light, the bearing can slip; and the retainer adopts internal guide, an oil film is formed on the guide surface of the retainer, and the friction of the oil film provides drag force for the retainer at the inner ring of a non-load area, so that the additional driving torque of the retainer to the rolling element is increased, the rolling element can be prevented from slipping, the high rotating speed performance of the bearing is more easily realized, and the temperature resistance problem of the bearing is also solved.

The width of the inner ring 2 is smaller than that of the outer ring 1; therefore, when the two bearings are used in parallel, only the end faces of the outer rings of the bearings abut against each other, and a gap is formed between the two inner rings, so that the problems that in the prior art, when the bearings with the end faces of the outer rings and the inner rings being flush are used in parallel, due to the existence of tolerance, the two inner rings abut against each other, the two outer rings do not abut against each other, and the outer rings are extruded by the end covers, so that the rolling body channels of the outer rings and the inner rings of the two bearings are staggered, and the rolling body is blocked and; in addition, the bearing sleeve can be directly used in pairs, the bearing sleeve does not need to be installed, or the bearings installed in pairs are subjected to paired match grinding, so that the installation and the use are more convenient, and the automatic production is realized.

Preferably, the rolling element channel 12 of the outer ring 1 has a groove curvature of 0.529 to 0.539 times the diameter of the rolling element, the rolling element channel 21 of the inner ring 2 has a groove curvature of 0.5513 to 0.515 times the diameter of the rolling element, and the groove curvatures of the rolling element channels of the outer ring 1 and the inner ring 2 are both within a positive tolerance.

In order to reduce dust entering the moving area of the rolling element, the present embodiment further includes a dust-proof cover 5, and the dust-proof cover 5 is symmetrically and fixedly arranged outside the retainer 4 to shield the retainer 4 and the rolling element 3.

Specifically, the dust cover 5 includes a dust cover body 51, a positioning portion 53 is fixedly arranged at the upper end of the dust cover body 51, a sealing portion 51 is fixedly arranged at the lower end of the dust cover body 51, the inner circumferential surface of the outer ring 1 is close to annular dust cover positioning grooves 11 symmetrically arranged at the two outer edges of the inner circumferential surface, the positioning portion 53 is clamped in the dust cover positioning grooves 11, and the sealing portion 52 is pressed close to the outer circumferential surface 22 of the inner ring.

The section of the dust cover positioning groove 11 comprises a vertical edge 111 and a bevel edge 112, the upper ends of the vertical edge 111 and the bevel edge 113 are in transition connection through a transition curve, and the bevel edge 113 is close to the outer edge side of the outer ring 1; the cross section of the positioning part 53 comprises a curled edge 531, the dust cover body 51 comprises a vertical body 51, the vertical body 51 and the curled edge 531 are connected by a transition edge 532, and the curled edge 531 is curled inwards; after the dust cover 5 is assembled, the curled edge 531 abuts against the inclined edge 112, and the vertical body 51 is pressed against the vertical edge 111.

The positioning portion 53 is intermittently disposed at the outer edge of the dust cover body 51.

The sealing part 52 comprises a bent side 521, the bent side 521 is bent towards the direction of the rolling body 3, and the lower end of the bent side 521 is close to the outer peripheral surface 22 of the inner ring, so that dust is reduced to the greatest extent and enters the moving area of the rolling body, and the service life of the bearing is prolonged; and its simple structure is convenient for fast assembly.

It is worth mentioning that the bearing to which the present application is directed is a deep groove ball bearing.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a be used for two sets of thin wall bearing of parallel horizontal installation which characterized in that: including outer lane, inner circle, rolling element, holder, its characterized in that: the rolling bodies are positioned among the outer ring, the inner ring and the retainer, and the retainer is of a symmetrical double-sheet structure and two pieces of retainer are fixedly assembled;

the retainer adopts an inner guide mode;

the width of the inner ring is smaller than that of the outer ring;

2. The thin-walled bearing for two sets of juxtaposed horizontal mountings of claim 1 wherein: the rolling bearing is characterized by further comprising dustproof covers, wherein the dustproof covers are symmetrically and fixedly arranged outside the retainer and shield the retainer and the rolling bodies.

3. The thin-walled bearing for two sets of juxtaposed horizontal mountings of claim 1 wherein: the dustproof cover comprises a dustproof cover body, a positioning portion is fixedly arranged at the upper end of the dustproof cover body, a sealing portion is fixedly arranged at the lower end of the dustproof cover body, annular dustproof cover positioning grooves are symmetrically formed in the inner peripheral surface of the outer ring, close to the outer edges of the two sides of the outer ring, the positioning portion is clamped in the dustproof cover positioning grooves, and the sealing portion is pressed close to the outer peripheral surface of the inner ring.

4. A thin-walled bearing for two sets of juxtaposed horizontal mountings as claimed in claim 3 wherein: the section of the dustproof cover positioning groove comprises a vertical edge and a bevel edge, the upper ends of the vertical edge and the bevel edge are in transition connection through a transition curve, and the bevel edge is close to the outer edge side of the outer ring; the cross section of the positioning part comprises a curled edge, the dustproof cover body comprises a vertical body, the vertical body is connected with the curled edge through a transition edge, and the curled edge is curled inwards; after the dustproof cover is assembled, the curled edge is tightly abutted to the inclined edge, and the vertical body is tightly pressed on the vertical edge.

5. The thin-walled bearing for two sets of juxtaposed horizontal mountings of claim 4 wherein: the positioning part is discontinuously arranged at the outer edge of the dustproof cover body.

6. A thin-walled bearing for two sets of juxtaposed horizontal mountings as claimed in claim 3 wherein: the sealing part comprises a bent edge, the bent edge is bent towards the direction of the rolling body, and the lower end face of the bent edge is close to the outer peripheral face of the inner ring.