CN212899396U

CN212899396U - Automatic double-row angular contact ball bearing of aligning

Info

Publication number: CN212899396U
Application number: CN202021616237.XU
Authority: CN
Inventors: 徐向军
Original assignee: Zhenjiang Zetai Bearing Co ltd
Current assignee: Zhenjiang Zetai Bearing Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-04-06
Anticipated expiration: 2030-08-06

Abstract

The utility model relates to a bearing technical field specifically is an automatic biserial angular contact ball bearing of aligning, including outer lane and inner circle, offer slide on the sphere on the medial surface of outer lane, the length of slide on the sphere is less than the length of outer lane, sets up the lower slide of symmetric distribution on the last side of inner circle, is provided with the steel ball that a plurality of evenly distributed on the sphere between slide and the lower slide, has cup jointed the holder on the steel ball, is provided with the sealing washer between first seal groove and the second seal groove, and the oiling groove has been seted up to the last side of outer lane. The utility model discloses the length of slide is less than the length of outer lane on the sphere, makes the steel ball automatic aligning in fixed region, and sphere type convex surface and circle body swing joint on the sealing washer promote moving stability and life, through oil filler point dropwise add appropriate amount lubricating oil alright with the lubricity of keeping of longer time, do not need relubricate in the use, promote the practicality of bearing, the steel ball rotates at steel ball inslot portion, promotes bearing moving speed.

Description

Automatic double-row angular contact ball bearing of aligning

Technical Field

The utility model relates to a double row angular contact ball bearing especially relates to an automatic double row angular contact ball bearing of aligning, belongs to bearing technical field.

Background

The self-aligning ball bearing is a double-row bearing with a spherical outer ring raceway, an inner ring, a ball and a retainer can freely rotate around the center of the bearing, the outer ring raceway is processed into a spherical surface shape, the inner ring is provided with two deep groove raceways, the self-aligning ball bearing has self-aligning performance and is mainly used for bearing radial load, a small amount of axial load can be borne while the radial load is borne, but the bearing can not bear pure axial load generally, the limit rotating speed of the bearing is lower than that of the deep groove ball bearing, the bearing is mainly used on double supporting shafts which are easy to bend under the action of load, and double bearing holes can not ensure parts with strict coaxiality;

the size of a slide way on the spherical surface of a conventional self-aligning bearing is the same as the outer length, a steel ball and a retainer can slide out under the condition of external force, and the operation efficiency is seriously influenced;

therefore, it is highly desirable to improve a self-aligning double row angular contact ball bearing to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automatic biserial angular contact ball bearing of aligning goes up the slide and is spherical, and the length of slide is less than the length of outer lane on the sphere, makes the steel ball automatic aligning in fixed region, and sphere type convex surface and circle body swing joint on the sealing washer promote moving stability and life.

In order to achieve the above object, the utility model discloses a main technical scheme include:

an automatic aligning double-row angular contact ball bearing comprises an outer ring and an inner ring, wherein an inner side surface of the outer ring is provided with an upper spherical slideway, the length of the upper spherical slideway is smaller than that of the outer ring, an upper side surface of the inner ring is provided with symmetrically distributed lower slideways, a plurality of uniformly distributed steel balls are arranged between the upper spherical slideway and the lower slideways in a rolling manner, and a retainer is sleeved on the steel balls;

the lower side surface of the outer ring is provided with first sealing grooves which are symmetrically distributed, the upper side surface of the inner ring below the first sealing grooves is provided with a second sealing groove, the first sealing groove and the second sealing groove are on the same vertical axis, a sealing ring is fixedly arranged between the first sealing groove and the second sealing groove,

an oil filling groove is formed in the upper side face of the outer ring, and an oil filling hole is formed in the oil filling groove.

Preferably, the retainer is made of reinforced nylon.

Preferably, the retainer comprises a supporting arm and a fixed connecting ring, the fixed connecting ring is fixed on two sides of the supporting arm respectively, concave grooves are formed in two sides of the fixed connecting ring, and steel ball grooves matched with the steel balls are formed between the concave grooves.

Preferably, the oil injection hole is on the same vertical axis as the support arm.

Preferably, the one end of sealing washer fixed be provided with first convex surface connector that first seal groove cooperation was used, the other end of sealing washer fixed be provided with second convex surface connector that second seal groove cooperation was used.

Preferably, the radial play range of the steel ball is 20 um-40 um, and the axial play range of the steel ball is 15 um-50 um.

Preferably, the relative inclination of the outer race and the inner race should not exceed 3 °.

Preferably, the outer side surface of the seal ring is recessed in the outer side surfaces of the outer ring and the inner ring.

The utility model discloses possess following beneficial effect at least:

1. the upper slideway is spherical, and the length of the upper slideway on the spherical surface is smaller than that of the outer ring, so that the operation of the steel ball is effectively fixed in a specific area for automatic centering, the stability of the operation is improved, and accidents are prevented.

2. The first convex surface connector and the second convex surface connector on the sealing ring can be adjusted along with the operation of the steel ball when the bearing operates in a deviation mode, and the spherical convex block on the sealing ring is movably connected with the ring body, so that the sealing performance of the bearing is kept on one hand, and the service life of the sealing ring is prolonged on the other hand.

3. Proper lubricating oil is dripped through the oil filling hole, so that the lubricating property can be kept for a long time, no lubrication is needed in the using process, and the practicability of the bearing is improved.

4. The steel balls rotate in the steel ball grooves, friction between the steel balls or between the steel balls and the retainer is prevented, and lubricating oil is dripped from the oil injection holes to help to improve the running speed of the bearing.

5. The radial play range of the bearing is 20 um-40 um, the axial play range is 15 um-50 um, and when the bearing works under the negative play, the working condition of the steel balls is improved, and each steel ball can be stressed more uniformly, so that the service life of the bearing is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is an exploded view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a cross-sectional view of the outer ring of the present invention;

fig. 4 is a perspective view of the retainer of the present invention.

In the figure, 1-outer ring, 101-spherical upper slideway, 102-first sealing groove, 2-inner ring, 201-lower slideway, 202-second sealing groove, 3-retainer, 301-supporting arm, 302-fixed connecting ring, 303-concave groove, 304-steel ball groove, 4-steel ball, 5-oil groove, 501-oil hole, 6-sealing ring, 601-first convex connector and 602-second convex connector.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

As shown in fig. 1-4, the self-aligning double-row angular contact ball bearing provided by this embodiment includes an outer ring 1 and an inner ring 2, an upper spherical slideway 101 is provided on an inner side surface of the outer ring 1, the length of the upper spherical slideway 101 is smaller than that of the outer ring 1, the size of the upper spherical slideway 101 is the same as that of the outer spherical surface of the conventional aligning bearing, when the ball bearing is subjected to an external force, the ball 4 and the retainer 3 will slide out, which seriously affects the operation efficiency, the length of the upper spherical slideway 101 is smaller than that of the outer ring, thereby effectively fixing the operation of the ball 4 in a specific area, improving the operation stability and preventing accidents, the relative inclination between the outer ring 1 and the inner ring 2 should not exceed 3 °, the upper slideway is spherical, has self-aligning property, can compensate errors caused by non-concentricity and axial deflection, the upper side surface of the inner ring 2 is provided with symmetrically distributed lower slideways 201, a plurality of steel balls 4 which are uniformly distributed are arranged between the spherical upper slideway 101 and the spherical lower slideway 201 in a rolling manner, the steel balls 4 are sleeved with a retainer 3, the retainer 3 is made of reinforced nylon, so that the noise generated in the operation process is effectively reduced, and the operation speed is improved;

the lower side surface of the outer ring 1 is provided with first sealing grooves 102 which are symmetrically distributed, the upper side surface of the inner ring 2 is provided with a second sealing groove 202 below the first sealing groove 102, the first sealing groove 102 and the second sealing groove 202 are on the same vertical axis, a sealing ring 6 is fixedly arranged between the first sealing groove 102 and the second sealing groove 202, one end of the sealing ring 6 is fixedly provided with a first convex connector 601 which is matched with the first sealing groove 102 for use, the other end of the sealing ring 6 is fixedly provided with a second convex connector 602 which is matched with the second sealing groove 202 for use, the first convex connector 601 and the second convex connector 602 on the sealing ring 6 can be adjusted along with the running of a steel ball when the bearing runs in a deviation manner, on one hand, the sealing performance of the bearing is maintained, on the other hand, the flexibility of the sealing ring 6 is improved, and meanwhile, the use process does not need to be lubricated, so that the practicability of the bearing is improved;

oil filler point 5 has been seted up to the last side of outer lane 1, has seted up oil filler point 501 on the oil filler point 5, conveniently need not to dismantle sealing washer 6 to the inside dropwise add lubricating oil of bearing, promotes the convenience of later maintenance, both can guarantee sealing washer 6's leakproofness, can make things convenient for the maintenance in later stage again, promotes the practicality of bearing.

In this embodiment, as shown in fig. 1 and 4, the retainer 3 includes a support arm 301 and a fixed connection ring 302, the fixed connection ring 302 is fixed on both sides of the support arm 301, both sides of the fixed connection ring 302 are provided with concave grooves 303, a steel ball groove 304 adapted to the steel ball 4 is formed between the concave grooves 303, the oil filling hole 501 and the support arm 301 are on the same vertical axis, so that the steel ball 4 rotates inside the steel ball groove 304, friction is prevented from being generated between the steel balls 4 or between the steel balls 4 and the retainer 3, and lubricating oil is dripped from the oil filling hole 501 to help to improve the speed of bearing operation and service life.

In this embodiment, as shown in fig. 1, the radial play range of the steel ball 4 is 20um to 40um, the axial play range of the steel ball 4 is 15um to 50um, the maximization of the bearing life is directly related to the play of the bearing, when the hub bearing works under a large positive play, the load is concentrated on the steel ball 4 in the stress direction, the contact between the cylinder body and the inner and outer ring slideways can generate a large concentrated stress, so that the bearing life is shortened, and when the hub bearing works under a negative play, the working condition of the steel ball 4 is improved, and each steel ball 4 can be stressed more uniformly, so that the service life of the bearing is ensured.

In this embodiment, as shown in fig. 2, the outer side surface of the seal ring 6 is recessed in the outer side surfaces of the outer ring 1 and the inner ring 2, so that the seal ring 6 is prevented from being scratched by an external force in a high-speed operation process, the seal ring 6 is prevented from falling off, further, lubricating oil is prevented from overflowing, and the sealing performance of the bearing is improved.

As shown in fig. 1 to 4, the principle of the self-aligning double-row angular contact ball bearing provided by the present embodiment is as follows:

the inner side surface of the outer ring 1 is provided with a spherical upper slideway 101, the length of the spherical upper slideway 101 is less than that of the outer ring 1, the upper slideway is spherical and has automatic centering property, errors caused by non-concentricity and shaft deflection can be compensated, the relative inclination of the outer ring 1 and the inner ring 2 is not more than 3 degrees, thereby effectively fixing the operation of the steel ball 4 in a specific area, improving the stability of the operation and preventing accidents, the retainer 3 is made of reinforced nylon, effectively reducing the noise generated in the operation process, the first convex connector 601 and the second convex connector 602 on the sealing ring can be adjusted along with the operation of the steel ball when the bearing operates in a deviation manner, on one hand, the sealing property of the bearing is maintained, on the other hand, the flexibility of the sealing ring is improved, and meanwhile, the lubricating property can be maintained for a long time by dropping a proper amount of lubricating, need not lubricate again in the use, oiling groove 5 has been seted up to the side of going up of outer lane 1, oiling hole 501 has been seted up on oiling groove 5, need not to dismantle the sealing washer, conveniently to the inside dropwise add lubricating oil of bearing, steel ball 4 rotates at steel ball groove 304 inside, prevent to produce the friction between steel ball 4 or between steel ball 4 and the holder, steel ball 4's warp direction internal clearance scope is 20um ~40um, steel ball 4's axial internal clearance scope is 15um ~50um, each steel ball 4 at certain internal clearance within range will more even atress, thereby the life of bearing has been guaranteed.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to achieve the technical effect basically.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or system in which the element is included.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The self-aligning double-row angular contact ball bearing comprises an outer ring (1) and an inner ring (2), and is characterized in that a spherical upper slideway (101) is arranged on the inner side surface of the outer ring (1), the length of the spherical upper slideway (101) is smaller than that of the outer ring (1), symmetrically distributed lower slideways (201) are arranged on the upper side surface of the inner ring (2), a plurality of uniformly distributed steel balls (4) are arranged between the spherical upper slideway (101) and the lower slideways (201) in a rolling manner, and a retainer (3) is sleeved on each steel ball (4);

a first sealing groove (102) which is symmetrically distributed is formed in the lower side surface of the outer ring (1), a second sealing groove (202) is formed in the upper side surface of the inner ring (2) below the first sealing groove (102), the first sealing groove (102) and the second sealing groove (202) are on the same vertical axis, a sealing ring (6) is fixedly arranged between the first sealing groove (102) and the second sealing groove (202),

an oil filling groove (5) is formed in the upper side face of the outer ring (1), and an oil filling hole (501) is formed in the oil filling groove (5).

2. The self-aligning double row angular contact ball bearing according to claim 1, wherein: the retainer (3) is made of reinforced nylon.

3. The self-aligning double row angular contact ball bearing according to claim 1, wherein: the holder (3) includes support arm (301) and fixed connection circle (302), fixed connection circle (302) are fixed respectively the both sides of support arm (301), the both sides of fixed connection circle (302) all are provided with concave groove (303), be formed with between concave groove (303) with steel ball groove (304) of steel ball (4) looks adaptation.

4. The self-aligning double row angular contact ball bearing according to claim 3, wherein: the oil filling hole (501) and the supporting arm (301) are on the same vertical axis.

5. The self-aligning double row angular contact ball bearing according to claim 1, wherein: the one end of sealing washer (6) fixed be provided with first convex surface connector (601) that first seal groove (102) cooperation was used, the other end of sealing washer (6) fixed be provided with second convex surface connector (602) that second seal groove (202) cooperation was used.

6. The self-aligning double row angular contact ball bearing according to claim 1, wherein: the radial play range of the steel ball (4) is 20 um-40 um, and the axial play range of the steel ball (4) is 15 um-50 um.

7. The self-aligning double row angular contact ball bearing according to claim 1, wherein: the relative inclination of the outer ring (1) and the inner ring (2) must not exceed 3 °.

8. The self-aligning double row angular contact ball bearing according to claim 1, wherein: the outer side surface of the sealing ring (6) is recessed in the outer side surface of the outer ring (1) and the outer side surface of the inner ring (2).