CN214837893U

CN214837893U - Double-lip sealing deep groove ball bearing

Info

Publication number: CN214837893U
Application number: CN202023105629.2U
Authority: CN
Inventors: 顾峰柏; 周国平
Original assignee: Wuxi Bokai Light Bearing Co ltd
Current assignee: Wuxi Bokai Light Bearing Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-11-23
Anticipated expiration: 2030-12-21

Abstract

The utility model provides a two lip seal deep groove ball bearing, including inner circle, outer lane, steel ball and sealing washer, the cover is equipped with the outer lane on the inner circle, the steel ball is provided with a plurality ofly on the circular orbit that inner circle and outer lane formed, the dust groove has all been seted up to the inside of inner circle and outer lane, the dust groove symmetry is seted up at the circular orbit both ends that inner circle and outer lane formed, and keeps away from the steel ball setting, the B position grinding setting of dust groove, the sealing washer outer lip card is established on the dust groove A position of outer lane, the contact of sealing washer inner lip is on the dust groove B, C position of inner circle, and with the laminating setting of dust groove B, C position of inner circle; the utility model discloses inner circle dustproof groove B position and sealing washer contact site adopt the processing method who grinds, improve the size precision at dustproof groove B position, geometric tolerances requirement, reduce contact site roughness, improve the unity of bearing sealing performance and sealed effect, extension sealing washer life improves bearing life.

Description

Double-lip sealing deep groove ball bearing

Technical Field

The utility model mainly relates to a sealed bearing field especially relates to a sealed deep groove ball bearing of two lips.

Background

At present, the sealing groove of the double-lip sealing bearing is formed by one-step machining by using a vehicle, the machining precision is low, the control of size and form and position tolerance is difficult, and the sealing performance of the bearing is directly influenced due to large deformation after heat treatment.

Meanwhile, the machining precision of the sealing groove is low, the uniformity of the size and form and position tolerance is poor, the roughness of the contact part of the sealing groove and the sealing ring is large, the uniformity of the sealing effect of the bearing is poor, the lip of the sealing ring is easy to wear early, the bearing fails early, and the service life of the bearing is shortened.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a double-lip sealing deep groove ball bearing, which comprises an inner ring 1, an outer ring 2, a steel ball 3 and a sealing ring 4, wherein the inner ring 1 is sleeved with the outer ring 2, a plurality of steel balls 3 are arranged on an annular track formed by the inner ring 1 and the outer ring 2,

the inner ring 1 and the outer ring 2 are both internally provided with dustproof grooves 5, the dustproof grooves 5 are symmetrically arranged at two ends of an annular track formed by the inner ring 1 and the outer ring 2 and are far away from the steel ball 3,

the part B of the dust-proof groove 5 is ground and arranged, the outer lip of the sealing ring 4 is clamped on the part A of the dust-proof groove of the outer ring 2, and the inner lip of the sealing ring 4 is in interference fit with the part B, C of the dust-proof groove of the inner ring 1 and is attached to the part B, C of the dust-proof groove of the inner ring 1.

Preferably, the steel ball 3 is sleeved with a retainer 6.

Preferably, the retainer 6 is of an annular structure, and the steel balls 3 are fixedly arranged on an annular track formed by the inner ring 1 and the outer ring 2 through the retainer 6.

Preferably, the tolerance range of grinding of the dust-proof groove B part of the inner ring 1 is less than 0.03 mm.

Preferably, the roundness of the outer circle of the dust-proof groove B part of the inner ring 1 is less than 0.005 mm.

Preferably, the coaxiality of the outer circle of the dust-proof groove B part of the inner ring 1 and the inner hole is less than 0.01 mm.

Preferably, the surface roughness of the dust-proof groove B portion of the inner ring 1 is less than Ra 0.8.

The utility model has the advantages that: the contact part of the inner ring dustproof groove B and the sealing ring adopts a grinding processing method, so that the requirements of the dustproof groove B on the dimensional precision and form and position tolerance are improved, the surface roughness of the contact part is reduced, the sealing performance and the sealing effect uniformity of the bearing are improved, the service life of the sealing ring is prolonged, and the service life of the bearing is prolonged.

Drawings

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

FIG. 2 is a cross-sectional view of the overall structure of the present invention;

FIG. 3 is an enlarged view of a portion of the structure of the present invention;

in the figure, the position of the upper end of the main shaft,

1. an inner ring; 2. an outer ring; 3. a steel ball; 4. a seal ring; 5. a dust-proof groove; 6. a cage.

Detailed Description

In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.

As shown in fig. 1-3, the present invention comprises: the steel ball bearing comprises an inner ring 1, an outer ring 2, a steel ball 3 and a sealing ring 4, wherein the outer ring 2 is sleeved on the inner ring 1, a plurality of steel balls 3 are arranged on an annular track formed by the inner ring 1 and the outer ring 2,

In this embodiment, the steel ball 3 is preferably fitted with a holder 6.

In this embodiment, the retainer 6 is preferably of an annular structure, and the steel balls 3 are fixedly disposed on an annular track formed by the inner ring 1 and the outer ring 2 via the retainer 6.

In the present embodiment, the tolerance range of the grinding process of the dust-proof groove B of the inner ring 1 is preferably less than 0.03 mm.

In the present embodiment, the roundness of the outer circle of the dust-proof groove B portion of the inner ring 1 is preferably less than 0.005 mm.

In this embodiment, the coaxiality between the outer circle of the dust-proof groove B of the inner ring 1 and the inner hole is preferably less than 0.01 mm.

In this embodiment, the surface roughness of the dust-proof groove B portion of the inner ring 1 is preferably less than Ra 0.8.

In use,

the existing processing technology of the inner ring dustproof groove B part is as follows: lathing → heat treatment → grinding two planes → grinding the channel → superfinishing the channel → assembling;

the inner circle dustproof groove B position the utility model discloses processing technology does: lathing → heat treatment → grinding two planes → grinding the channel → grinding the dust-proof groove → superfinishing the channel → assembling.

The advantages achieved are:

1. the size and form and position tolerance precision of the dustproof groove after grinding is greatly improved;

2. the coaxiality of the dust-proof groove and the inner hole is obviously reduced;

3. the surface roughness of the contact surface of the dust-proof groove and the sealing ring is greatly reduced;

4. the contact quantity of the contact part B of the inner lip of the sealing ring and the inner ring dustproof groove is more uniform, and the sealing effect is better;

5. the rubber of the inner lip of the sealing ring is not easy to wear and has longer service life.

The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.

Claims

1. A double-lip sealed deep groove ball bearing is characterized by comprising an inner ring (1), an outer ring (2), a steel ball (3) and a sealing ring (4), wherein the outer ring (2) is sleeved on the inner ring (1), a plurality of steel balls (3) are arranged on an annular track formed by the inner ring (1) and the outer ring (2),

dust grooves (5) are respectively arranged inside the inner ring (1) and the outer ring (2), the dust grooves (5) are symmetrically arranged at two ends of an annular track formed by the inner ring (1) and the outer ring (2) and are far away from the steel ball (3),

the B part of the dust-proof groove (5) is ground and arranged, the outer lip of the sealing ring (4) is clamped on the A part of the dust-proof groove of the outer ring (2), and the inner lip of the sealing ring (4) is in interference fit with the B, C part of the dust-proof groove of the inner ring (1) and is attached to the B, C part of the dust-proof groove of the inner ring (1).

2. The double-lip seal deep groove ball bearing of claim 1, wherein: the steel ball (3) is sleeved with a retainer (6).

3. The double-lip seal deep groove ball bearing of claim 2, wherein: the retainer (6) is of an annular structure, and the steel balls (3) are fixedly arranged on an annular track formed by the inner ring (1) and the outer ring (2) through the retainer (6).

4. The double-lip seal deep groove ball bearing of claim 1, wherein: the tolerance range of grinding of the part B of the dust-proof groove of the inner ring (1) is less than 0.03 mm.

5. The double-lip seal deep groove ball bearing of claim 4, wherein: the roundness of the outer circle of the dust-proof groove B part of the inner ring (1) is less than 0.005 mm.

6. The double-lip seal deep groove ball bearing of claim 5, wherein: the coaxiality of the outer circle of the dust-proof groove B of the inner ring (1) and the inner hole is less than 0.01 mm.

7. The double-lip seal deep groove ball bearing of claim 6, wherein: the surface roughness of the dust-proof groove B part of the inner ring (1) is less than Ra 0.8.