CN212744733U - Thrust ball bearing inner and outer ring composite structure - Google Patents

Abstract

The utility model relates to a thrust ball bearing technical field discloses an inner and outer ring integrated configuration in thrust ball bearing, including inner circle (1) and outer lane (2) that the symmetry set up in the axial, inner circle (1) cladding elasticity sealing member (4), seal outer lane (2) between inner circle (1) and support component (5) of installing in outer lane (2) downside, elasticity sealing member (4) are including respectively cladding first sealing (41) to inner circle peripheral ring and cladding second sealing (42) to inner circle inner peripheral ring, first sealing (41) are equipped with relative outer lane (2) and extend to the outside and crimping to first outer edge lip (411) of support component (5), first sealing (41) and second sealing (42) all are equipped with along lip (412, 422) to the extension of outer lane (2) direction; this integrated configuration is sealed inner circle and the inner peripheral part of outer lane through the interior lip of following of first sealing and the interior lip of following of second sealing, and is sealed effectual.

Description

Thrust ball bearing inner and outer ring composite structure

Technical Field

The utility model relates to a thrust ball bearing technical field, concretely relates to thrust ball bearing inner and outer lane integrated configuration.

Background

The thrust ball bearing adopts a design capable of bearing thrust load during high-speed operation and is composed of a washer-shaped ferrule with a raceway groove for rolling balls. The thrust ball bearing can bear axial load but cannot bear radial load; therefore, the bearing is suitable for parts bearing axial load on one surface and having low rotating speed, such as a crane hook, a vertical water pump, a vertical centrifuge, a jack, a low-speed reducer and the like. As another example, a thrust ball bearing is also arranged between an upper mounting piece and a lower mounting piece of an independent suspension of the vehicle, and an inner ring and an outer ring which are opposite in the axial direction; a plurality of balls rotatably arranged between the facing surfaces of the inner ring and the outer ring; and an inner elastic sealing member and an outer elastic sealing member for sealing inner circumferential portions and outer circumferential portions of the inner ring and the outer ring.

For example, japanese patent laid-open No. 2002-227861 discloses a thrust ball bearing composed of two races composed of a pair of annular plates, into which a plurality of balls are inserted so as to be capable of rolling at a plurality of circumferential positions between radially outwardly facing surfaces of the two races, and in which an adhesive agent is accumulated in a liquid reservoir provided at least in an end face of an adhesion region of a seal lip in the second race, the adhesion property of the seal lip being enhanced by making the adhesive agent difficult to peel; the problem that the adhesive property of the sealing lip needs to be well guaranteed in the thrust ball bearing is solved. The sealing effect is good, and lubricating grease can be effectively prevented from leaking; but the preparation needs to design the structure more meticulous, needs to fill the adhesive during installation, and the operation is more loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide an inner and outer ring combined structure of a thrust ball bearing, which seals the inner ring and the inner periphery of the outer ring through the inner edge lip of a first sealing part and the inner edge lip of a second sealing part, has good sealing effect, does not need to be filled with adhesive and reduces the installation steps; the first outer edge lip and the second outer edge lip have the function of preventing foreign matters such as external muddy water from entering the bearing.

In order to achieve the above object, the present invention provides the following technical solutions:

a thrust ball bearing inner and outer ring combined structure comprises an inner ring and an outer ring which are symmetrically arranged in the axial direction, wherein the inner ring is coated with an elastic sealing component, the outer ring is sealed between the inner ring and a supporting component arranged on the lower side of the outer ring, the elastic sealing component comprises a first sealing part and a second sealing part, the first sealing part is respectively coated on an outer peripheral ring of the inner ring, the second sealing part is coated on an inner peripheral ring of the inner ring, the first sealing part is provided with a first outer edge lip which extends outwards relative to the outer ring and is pressed on the supporting component, the first sealing part and the second sealing part are respectively provided with an inner edge lip which extends towards the outer ring, the inner edge lip of the first sealing part is pressed on the outer surface of the outer peripheral ring, the inner edge lip of the second sealing part is arranged at the lower end of the inner peripheral ring of the outer ring and is pressed on the inner surface of the inner peripheral ring of the supporting component, the inner, effectively prevent the leakage of the lubricating grease.

Preferably, the second seal portion is also provided with a second outer edge lip portion which extends inward relative to the outer ring and is pressed against the support member, the second outer edge lip portion has a function of preventing foreign matter such as external muddy water from entering the bearing, and the first outer edge lip portion and the second outer edge lip portion are mutually matched, so that the bearing sealing effect is better.

Preferably, the second seal portion includes a second covering portion covering the inner peripheral ring of the inner ring and a second base portion extending along the inner peripheral ring of the inner ring, and the second base portion extends to a lower end of the inner peripheral ring of the outer ring.

Preferably, the inner edge lip of the second sealing part comprises a bulge integrally connected with the end part of the second base part and a crimping part which is sequentially reduced along the radial direction extending to the inner peripheral direction of the outer ring, and the crimping part is bent towards the inner peripheral direction of the outer ring; the crimping part is crimped with the supporting component, and when the bearing is used, the inner ring and the inner circumference part of the outer ring are sealed, so that the lubricating grease is effectively prevented from leaking, and foreign matters such as external muddy water and the like are prevented from entering the bearing; when the assembly of the inner ring, the outer ring and the supporting component is finished, the press-connection part is pressed between the bottom of the inner peripheral ring of the outer ring and the supporting component, and the function of extruding the supporting component and upwards pressing the inner peripheral ring of the outer ring is achieved, so that the inner ring and the outer ring are prevented from being separated.

Preferably, the end face of the pressure contact portion is an arc surface, so that a contact surface with the outer ring inner peripheral ring can be reduced to be relatively small, and the rotational torque can be reduced.

Preferably, the second coating portion is provided with a third lip portion on the inner peripheral surface side of the inner peripheral ring of the outer ring, the third lip portion is located below the rolling element between the inner ring and the outer ring and extends toward the outer ring, and when the inner ring and the outer ring move in the axial direction away from each other, the third lip portion abuts against the retainer in the rolling element to prevent the balls in the rolling element from shifting relative to the running track thereof.

Preferably, the first seal portion includes a first cover portion covering the inner ring outer peripheral ring and a first base portion extending along the inner ring outer peripheral ring, the first base portion extending to the outer ring outer peripheral ring.

Preferably, the first outer edge lip is integrally connected with the end part of the first base part, and the included angle between the first outer edge lip and the peripheral side face of the first base part is 160 DEG and 178 DEG; the inner edge lip of the first sealing part is integrally connected with the end part of the first base part, and forms an obtuse angle with the inner peripheral side surface of the first base part, and the inner edge lip abuts against the outer ring peripheral ring, so that a certain elastic space is formed, and the sealing effect is good.

Compared with the prior art, the beneficial effects of the utility model are that:

the inner ring and the outer ring of the thrust ball bearing combined structure of the utility model seal the inner ring and the inner peripheral part of the outer ring through the inner edge lip of the first sealing part and the inner edge lip of the second sealing part, thereby effectively preventing lubricating grease from leaking, having good sealing effect, not needing to be filled with adhesive and reducing the installation steps;

the inner and outer ring combined structure of the thrust ball bearing has the function of preventing foreign matters such as external muddy water from entering the bearing through the first outer edge lip and the second outer edge lip; and the third lip part supports against the retainer, so that the balls between the inner ring and the outer ring are prevented from shifting relative to the running track, the risk that the balls deviate from the track is reduced, and the normal operation of the bearing is ensured.

Drawings

Fig. 1 is a schematic structural view of an inner and outer race combined structure of a thrust ball bearing in the present embodiment.

Fig. 2 is a sectional view of an inner and outer race combination structure of a thrust ball bearing in the present embodiment.

Fig. 3 is a partial sectional view of an inner and outer race assembly of the thrust ball bearing of fig. 2.

Fig. 4 is a partial sectional view of the inner and outer ring combined structure of the thrust ball bearing in fig. 2 in a state that the inner ring and the outer ring move away from each other.

In the drawings: 1-inner ring, 1 a-inner ring outer peripheral ring, 1 b-inner ring inner peripheral ring, 1 c-inner ring curved part, 2-outer ring, 2 a-outer ring outer peripheral ring, 2 b-outer ring inner peripheral ring, 2 c-outer ring curved part, 3-rolling body, 31-cage, 32-ball, 4-elastic sealing part, 41-first sealing part, 411-first outer edge lip, 41 a-first coating part, 41 b-first base part, 42-second sealing part, 42 a-second coating part, 42 b-second base part, 421-second outer edge lip, 412/422-inner edge lip, 422 a-convex part, 422 b-press part, 423-third lip, 5-support part.

Detailed Description

Example 1: the utility model provides a preferred embodiment provides an inner and outer lane integrated configuration in thrust ball bearing, including inner circle 1 and the outer lane 2 that the symmetry set up in the axial, and form an annular between inner circle 1 and the outer lane 2 and hold the chamber, the annular holds the intracavity and installs rolling element 3, and rolling element 3 holds the intracavity holder 31 and set up a plurality of balls 32 in holder 31 with rolling including locating the annular, and ball 32 arranges between the facing of inner circle 1 and outer lane 2, is kept by holder 31.

The inner ring 1 is covered with an elastic seal member 4, and the elastic seal member 4 seals the inner ring 1 and the outer ring inner circumferential portion 2a, i.e., an annular housing chamber, and grease as a lubricant is sealed therein.

The sealed type thrust ball bearing of this example can be used for an independent suspension of an automobile, in which the outer ring 2 and the rolling elements 3 are sealed between the inner ring 1 and a support member 5 attached to the lower side of the outer ring 2, and the support member 5 serves as a spring seat of the independent suspension and serves as a spring receiving portion.

The radial inner side of the inner ring 1 extends downwards to form an inner ring inner peripheral ring 1b, the radial outer side of the inner ring 1 extends upwards to form an inner ring outer peripheral ring 1a, and the inner ring inner peripheral ring 1b is connected with the inner ring outer peripheral ring 1a through an inner ring bending part 1 c; the radial inner side of the outer ring 2 extends downwards to form an outer ring inner peripheral ring 2b, the outer side of the outer ring 2 extends upwards to form an outer ring outer peripheral ring 2a, the outer ring inner peripheral ring 2b is tightly attached to the spring seat, and the outer ring inner peripheral ring 2b is connected with the outer ring outer peripheral ring 2a through an outer ring bending part 2 c; the inner-ring curved portion 1c and the outer-ring curved portion 2c form a track for the balls 32.

The elastic sealing member 4 includes a first sealing portion 41 respectively covering the inner ring outer peripheral ring 1a and a second sealing portion 42 covering the inner ring inner peripheral ring 1b, the first sealing portion 41 is provided with a first outer edge lip 411 extending outward relative to the outer ring 2 and pressed against the support member 5, the first sealing portion 41 and the second sealing portion 42 are both provided with inner edge lips 412 and 422 extending in the outer ring 2 direction, the inner edge lip 412 of the first sealing portion 41 is pressed against the outer surface of the outer ring outer peripheral ring 2a, and the inner edge lip 422 of the second sealing portion 42 is provided at the lower end of the outer ring inner peripheral ring 2b and pressed against the inner surface of the inner peripheral ring of the support member 5; the inner edge lip 412 of the first sealing part 41 and the inner edge lip 422 of the second sealing part 42 seal the inner ring 1 and the inner circumference of the outer ring 2, thereby effectively preventing grease leakage; the first outer lip 411 prevents foreign matter such as muddy water from entering the bearing.

The second sealing portion 42 includes a second covering portion 42a covering the inner ring inner peripheral ring 1b and a second base portion 42b extending along the inner ring inner peripheral ring 1b, the second covering portion 42a covers the inner ring inner peripheral ring 1b, the second base portion 42b extends to the lower end of the outer ring inner peripheral ring 2b, an inner edge lip portion 422 of the second sealing portion 42 includes a protrusion portion 422a integrally connected with an end portion of the second base portion 42b and a press-contact portion 422b sequentially reduced in a radial direction extending to the outer ring inner peripheral ring 2b, and the press-contact portion 422b is bent toward the outer ring inner peripheral ring 2 b.

As shown in fig. 4, when the inner ring 1, the outer ring 2, and the spring seat are assembled, the boss 422a is separated from the outer ring inner circumferential ring 2b and the spring seat, and when the inner ring 1 and the outer ring 2 are moved in the direction in which the axial directions are separated from each other, the outer ring inner circumferential ring 2b is held by the boss 422a, which has a function of preventing the inner ring 1 and the outer ring 2 from being separated. The press-connection part 422b is pressed and connected with the spring seat, when in use, the inner ring 1 and the inner circumference part of the outer ring 2 are sealed, so that the grease leakage is effectively prevented, and foreign matters such as external muddy water and the like are prevented from entering the bearing; when the assembly of the inner ring 1, the outer ring 2 and the spring seat is finished, the press-connection part 422b is pressed between the bottom of the outer ring inner peripheral ring 2b and the spring seat, and has the function of extruding the spring seat and upwards pressing the outer ring inner peripheral ring 2b, so that the separation effect of the inner ring 1 and the outer ring 2 is prevented from being enhanced; and the outer ring 2 is made to abut against the balls 32, preventing the balls 32 from being displaced relative to their running tracks.

The first seal portion 41 includes a first covering portion 41a covering the inner ring outer peripheral ring 1a, and a first base portion 41b extending along the inner ring outer peripheral ring 1a, the first covering portion 41a covering the inner ring outer peripheral ring 1a, and the first base portion 41b extending to the outer ring outer peripheral ring 2 a. The first outer lip 411 is integrally connected with the end of the first base 41b, and has an included angle of 160 and 178 degrees with the outer peripheral side surface of the first base 41b, so that the function of preventing foreign matters such as external muddy water from entering the bearing is achieved. The inner edge lip 412 of the first seal portion 41 is integrally connected to the end of the first base portion 41b, the inner edge lip 412 of the first seal portion 41 is pressed against the outer circumferential surface of the outer ring curved portion 2c to prevent the bearing from separating, and the inner edge lip 422 of the second seal portion 42 is engaged with each other without increasing the elastic deformation force of the seal lip to prevent the bearing from separating; and the included angle between the first base part 41b and the inner peripheral side surface is an obtuse angle, the included angle is 91-120 degrees, the first base part is abutted against the outer ring peripheral ring 2a, a certain elastic space is provided, and the sealing effect is good.

Meanwhile, the inner ring 1 is coated and the outer ring 2 is sealed in the embodiment, so that the inner ring 1 and the outer ring 2 are not exposed in the air, the possibility of rusting is reduced, and the service life of the bearing is prolonged.

Example 2: the utility model relates to a preferred embodiment provides a thrust ball bearing inner and outer lane integrated configuration, its difference with above-mentioned embodiment only lies in: the second sealing portion 42 is also provided with a second outer edge lip portion 421 which extends inward relative to the outer ring 2 and is pressed to the support member 5, the second outer edge lip portion 421 has a function of preventing foreign matters such as external muddy water from entering the bearing, and the first outer edge lip portion 411 and the second outer edge lip portion 421 are mutually matched, so that the bearing sealing effect is better.

Example 3: the utility model relates to a preferred embodiment provides a thrust ball bearing inner and outer lane integrated configuration, its difference with above-mentioned embodiment only lies in: the end face of the press-connection part 422b is an arc surface, so that the contact surface of the press-connection part with the outer ring inner circumferential ring 2b can be reduced to be relatively small, and the rotation torque can be reduced. Example 4: the utility model relates to a preferred embodiment provides a thrust ball bearing inner and outer lane integrated configuration, its difference with above-mentioned embodiment only lies in: the second coating portion 42a has a third lip 423 on the inner peripheral surface side of the outer ring inner peripheral ring 2b, the third lip 423 is located below the rolling element 3 and extends in the outer ring 2 direction, and the third lip 423 functions to abut against the cage 31; when the inner ring 1 and the outer ring 2 move in the direction away from each other in the axial direction, the third lip 423 abuts against the cage 31, and the balls 32 are prevented from being displaced relative to the running track. If the third lip 423 is not provided, the inner ring 1 and the outer ring 2 are prevented from being separated under the action of the protrusion 422a and the press-connection part 422b, but the ball 32 moves along with the inner ring 1 and the outer ring 2 to deviate from the track in the process of moving in the axial direction, and at this time, the resistance between the bearing operation ball 32 and the inner ring 1 and the outer ring 2 is increased, the service life of the bearing is reduced, and certain safety risk also exists.

Claims (9)

1. A thrust ball bearing inner and outer ring combined structure comprises an inner ring (1) and an outer ring (2) which are symmetrically arranged in the axial direction, wherein the inner ring (1) is coated with an elastic sealing part (4), the outer ring (2) is sealed between the inner ring (1) and a supporting part (5) arranged at the lower side of the outer ring (2),

the elastic sealing component (4) comprises a first sealing part (41) and a second sealing part (42), wherein the first sealing part (41) is respectively coated on the outer peripheral ring of the inner ring (1) and the second sealing part (42) is coated on the inner peripheral ring of the inner ring (1), the first sealing part (41) is provided with a first outer edge lip part (411) which extends outwards relative to the outer ring (2) and is pressed and connected to the supporting component (5), the first sealing part (41) and the second sealing part (42) are respectively provided with inner edge lip parts (412, 422) which extend towards the outer ring (2),

the inner edge lip (412) of the first sealing part (41) is pressed against the outer peripheral surface of the outer ring (2), and the inner edge lip (422) of the second sealing part (42) is arranged at the lower end of the inner peripheral ring of the outer ring (2) and pressed against the inner peripheral surface of the inner peripheral ring of the supporting component (5).

2. An inner and outer race combination structure for a thrust ball bearing according to claim 1, wherein the second seal portion (42) is also provided with a second outer lip portion (421) extending inwardly with respect to the outer race (2) and press-fitted to the support member (5).

3. A thrust ball bearing inner and outer race combination structure according to claim 1, wherein the second seal portion (42) includes a second coating portion (42a) coating the inner peripheral ring of the inner race (1) and a second base portion (42b) extending along the inner peripheral ring of the inner race (1), the second base portion (42b) extending to the lower end of the inner peripheral ring of the outer race (2).

4. A thrust ball bearing inner and outer race combination structure according to claim 3, wherein the inner edge lip portion (422) of the second seal portion (42) includes a convex portion (422a) integrally connected to an end portion of the second base portion (42b) and a crimp portion (422b) which is radially and sequentially reduced in a direction extending to the inner peripheral ring of the outer race (2), the crimp portion (422b) being bent in a direction of the inner peripheral ring of the outer race (2).

5. The inner and outer race combination structure for a thrust ball bearing according to claim 4, wherein the end surface of the crimp portion (422b) is a circular arc surface.

6. A thrust ball bearing inner and outer race combination structure according to claim 3, wherein the second coating portion (42a) is provided with a third lip portion (423) on the inner peripheral surface side of the inner peripheral ring of the outer race (2).

7. A thrust ball bearing inner and outer race combination structure according to claim 1, wherein the first seal portion (41) includes a first coating portion (41a) coating the outer peripheral ring of the inner race (1) and a first base portion (41b) extending along the outer peripheral ring of the inner race (1), the first base portion (41b) extending to the outer peripheral ring of the outer race (2).

8. An inner and outer race combination structure for a thrust ball bearing according to claim 7, wherein the first outer peripheral lip portion (411) is integrally connected to the end of the first base portion (41b) at an angle of 160 ° and 178 ° to the outer peripheral side surface of the first base portion (41 b).

9. An inner and outer race combination structure for a thrust ball bearing according to claim 7, wherein an inner edge lip portion (412) of the first seal portion (41) is integrally connected to an end portion of the first base portion (41b) at an obtuse angle with respect to an inner peripheral side surface of the first base portion (41 b).

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