CN210715597U

CN210715597U - Rolling bearing sealing structure

Info

Publication number: CN210715597U
Application number: CN201920901167.3U
Authority: CN
Inventors: 唐小超
Original assignee: Huixian County Ruitai Auto Parts Co ltd
Current assignee: Huixian County Ruitai Auto Parts Co ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-06-09
Anticipated expiration: 2029-06-17

Abstract

A rolling bearing sealing structure belongs to the field of rolling bearings and comprises an inner ring, a sealing ring, an outer ring and a rolling body; the inner ring is arranged on the inner side of the rolling body, a channel for accommodating the rolling body is arranged on the outer circumference of the inner ring, and sealing ring mounting grooves are formed in two sides of the channel; the sealing ring comprises an inner lip edge, a rubber supporting body, a framework, a plane body and an outer lip edge; also comprises a gap; the sealing ring has the characteristic that the sealing performance of the sealing ring can be ensured when the rolling bearing axially moves within the axial clearance range.

Description

Rolling bearing sealing structure

Technical Field

The invention belongs to the field of rolling bearings, and particularly relates to a sealing structure for a release bearing of an automobile clutch.

Background

The rolling bearing is a common part in mechanical transmission, and has the functions of ensuring the support of the transmission body during rotation and reducing friction force; the common rolling bearing is mostly composed of an outer ring, an inner ring and a rolling body, and because the movement of the rolling bearing depends on the rolling of the rolling body between the inner ring and the outer ring, the sliding friction force is converted into the rolling friction force, so that the resistance in the transmission process is reduced; in practical applications, in order to make the rolling bearing durable and reduce friction, lubricant is often added between the rolling element and the inner and outer rings, and in order to prevent external impurities from entering between the rolling element and the inner and outer rings of the rolling bearing, a sealing structure is often arranged at an open part of the rolling element between the inner and outer rings to prevent dust from entering between the rolling element and the inner and outer rings to increase abrasion of the rolling element or the inner and outer rings, so that the applicant previously applied a chinese utility model patent (application No. 2019202236642) and realized sealing of the open part of the rolling bearing, as shown in fig. 1-3; in the use process, especially when the width of a sealing ring of a rolling bearing is less than 20 millimeters, the axial play of the rolling bearing can drive the end part of the sealing ring to displace to generate dislocation, so that the sealing performance is reduced in a short time, and the overall sealing performance is also reduced.

Disclosure of Invention

Aiming at the defects in the prior art and the prior application, the invention provides a rolling bearing sealing structure, which is characterized in that: the rolling bearing comprises an inner ring, a sealing ring, an outer ring and a rolling body; the inner ring is arranged on the inner side of the rolling body, a channel for accommodating the rolling body is arranged on the outer circumference of the inner ring, and sealing ring mounting grooves are formed in two sides of the channel; the two sealing rings are respectively arranged between the inner ring and the outer ring and positioned at two sides of the rolling body; the lip edges of the inner ring and the outer ring of the sealing ring are respectively embedded with the sealing ring mounting grooves on the inner ring and the outer ring; the outer ring is arranged on the outer side of the rolling body, a channel for accommodating the rolling body is arranged on the inner side of the outer ring, and sealing ring mounting grooves are respectively arranged on two sides of the channel; the rolling body is arranged between the inner ring and the outer ring and is positioned in the channel on the inner ring and the channel on the outer ring; the rolling body is provided with a plurality of circumferences which are uniformly distributed in the inner ring channel and the outer ring channel.

Furthermore, the width of the sealing ring mounting groove on the inner ring is equal to the width of the lip edge in the sealing ring.

Furthermore, the channels on the outer ring and the inner ring are located at the same axial position.

Furthermore, the width of the sealing ring mounting groove on the outer ring is equal to the width of the outer lip edge of the sealing ring.

Further, the rolling bodies are spheres.

Furthermore, the sealing ring comprises an inner lip edge, a rubber connecting body, a framework, a plane body and an outer lip edge; also comprises a gap; the inner lip edge is arranged at one end of the inner ring of the rubber connector, the width and the thickness of the inner lip edge are matched with the sealing ring mounting groove on the inner ring, and an included angle smaller than 90 degrees is formed between the inner lip edge and the rubber connector; the rubber connector is arranged between the inner lip edge and the plane body, the included angle between the rubber connector and the inner lip edge is less than 90 degrees, and the included angle between the rubber connector and the plane body is less than 180 degrees; the framework is made of hard materials, preferably metal materials; the framework is arranged on the plane body and the outer lip edge and is trapped inside the plane body and the outer lip edge; the plane body is arranged between the outer lip edge and the rubber connecting body, and the thickness of the plane body is greater than that of the framework; the outer lip edge is arranged at one end of the excircle of the plane body, and the width and the thickness of the outer lip edge are matched with those of the sealing ring mounting groove on the outer ring; the distance from the outer circumference of the outer lip edge to the inner circumference of the inner lip edge is greater than the distance from the bottom of the sealing ring mounting groove on the outer ring to the bottom of the sealing ring mounting groove on the inner ring; the notch is arranged on the inner side of the rubber connector, is V-shaped, C-shaped or concave, and has a depth larger than one half of the thickness of the rubber connector; the notch is provided with more than one notch which is arranged at the outer side of the plane body or the joint of the rubber connector and the plane body or the rubber connector is positioned at one end of the plane body, and the depth of the notch is less than two thirds of the thickness of the plane body.

Furthermore, the inner lip edge, the rubber connecting body, the plane body and the outer lip edge are made of rubber materials.

The inner part and the outer part take the position of the rolling body as the center, one side close to the rolling body is the inner part, and the other side far away from the rolling body is the outer part; the axial lead of the inner ring is taken as the center, the side close to the inner ring is the inner side, and the side far away from the inner ring is the outer side.

Advantageous effects

The invention has the advantages that the notch is adopted to offset the displacement when the bearing moves axially, the close contact between the inner lip edge and the outer lip edge and the inner ring and the outer ring is ensured, the dust entering caused by the single-edge upwarp of the inner lip edge or the outer lip edge due to the integral deformation of the sealing ring caused by the axial clearance of the rolling bearing is avoided, and the sealing reliability is ensured.

Drawings

FIG. 1 is a schematic view of the appearance of the present invention

1. Inner ring, 2 sealing ring, 3 outer ring.

FIG. 2 is a schematic cross-sectional view of the present invention

1. Inner ring, 2 sealing ring, 3 outer ring, 4 rolling body.

FIG. 3 is a schematic cross-sectional view of a conventional gasket

21. Inner lip, 22 rubber connector, 23 framework, 24 plane body and 25 outer lip.

FIG. 4 is a schematic cross-sectional view of a seal ring according to the present invention

21. Inner lip, 22 rubber connector, 23 skeleton, 24 plane body, 25 outer lip and 26 gap.

Detailed Description

For further explanation of the technical solutions of the present invention, the following description will be made with reference to the accompanying drawings; as shown in fig. 1-4, in this example, an outer ring of a deep groove ball bearing with an outer diameter of 120 mm, which is commonly used in the industry, is selected as an outer ring 3, a steel ball matched according to a national standard is selected as a rolling body 4, a corresponding carded rolling body 4 is equipped according to the national standard, an inner ring matched according to the national standard or the industrial standard is selected as an inner ring 1, the inner ring 1 is installed on the inner side of the rolling body 4, a channel on the inner ring 1 is embedded with the rolling body 4, the outer ring 3 is installed on the outer side of the rolling body 4, the channel on the outer ring 3 is embedded with the rolling body 4, annular grooves with a width of 2.5 mm and a depth of 1 mm are arranged on the inner diameter of the outer ring 3 and on two sides of the channel on the outer ring 3 as sealing ring installation grooves; two inner ring upper sealing ring mounting grooves are also arranged at the corresponding positions of the inner ring 1 and the outer ring, and a steel plate with the thickness of 0.8 mm is selected as a framework 23 in the embodiment; the width and the thickness of the inner lip edge 21 are 2.5 mm and 1 mm, so that the inner lip edge can be tightly matched with a sealing ring mounting groove on the inner ring 1, and dust can not enter the inner lip edge; selecting a V-shaped rubber connector 22 with the thickness of 1.5 mm and the depth of the notch 26 on the rubber connector 22 of 1 mm; selecting a plane body 24 with the thickness of 1.5 mm, and forming a V-shaped notch with the depth of 0.8 mm at the joint of the plane body 24 and the rubber connector 22 as a notch 26; the width and thickness of the outer lip edge 25 are 2.5 mm and 1 mm, two sealing rings 2 are arranged between the inner ring 1 and the outer ring 3 and positioned at two sides of the rolling body 4, the inner lip edge 21 is embedded into a sealing ring mounting groove on the inner ring 1, and the outer lip edge 25 is embedded into a sealing ring mounting groove on the outer ring 3, so that the implementation of the invention is completed.

When the sealing device is used, the inner ring 1 and the outer ring 3 respectively move along the outer surface of the rolling body 4, the sealing rings 2 are arranged on two sides of the rolling body 4, dust cannot enter the rolling body 4 from the outside of the space where the rolling body 4 is located, the abrasion between the rolling body 4 and the outer ring or between the rolling body 4 and the inner ring 1 is not aggravated, the rolling bearing allows a proper clearance according to the national standard, when the inner ring 1 and the outer ring 3 move axially, the inner ring 1 and the outer ring 3 respectively drive the inner lip edge 21 and the outer lip edge 25 to move axially, because the sealing effect is good, the lip edge of the sealing ring needs to be tightly matched with the sealing ring installation groove, and the displacement applied on the sealing ring 2 is converted into the deformation of the notch under the action of the notch 26, so that the whole sealing ring 2 cannot generate large deformation, the sealing effect cannot be damaged, therefore, when the rolling bearing axially moves in the clearance range, the integrity of the sealing structure cannot be broken, and the sealing effect is ensured.

Claims

1. A rolling bearing seal structure is characterized in that: the rolling bearing comprises an inner ring, a sealing ring, an outer ring and a rolling body; the inner ring is arranged on the inner side of the rolling body, a channel for accommodating the rolling body is arranged on the outer circumference of the inner ring, and sealing ring mounting grooves are formed in two sides of the channel; the two sealing rings are respectively arranged between the inner ring and the outer ring and positioned at two sides of the rolling body; the lip edges of the inner ring and the outer ring of the sealing ring are respectively embedded with the sealing ring mounting grooves on the inner ring and the outer ring; the outer ring is arranged on the outer side of the rolling body, a channel for accommodating the rolling body is arranged on the inner side of the outer ring, and sealing ring mounting grooves are respectively arranged on two sides of the channel; the rolling body is arranged between the inner ring and the outer ring and is positioned in the channel on the inner ring and the channel on the outer ring; the rolling body is provided with a plurality of circumferences which are uniformly distributed in the inner ring channel and the outer ring channel; the sealing ring comprises an inner lip edge, a rubber supporting part, a framework, a plane body and an outer lip edge; also comprises a gap; the inner lip edge is arranged at one end of the inner ring of the rubber supporting part, the width and the thickness of the inner lip edge are matched with the sealing ring mounting groove on the inner ring, and an included angle smaller than 90 degrees is formed between the inner lip edge and the rubber supporting part; the rubber supporting part is arranged between the inner lip edge and the plane body, the included angle between the rubber supporting part and the inner lip edge is less than 90 degrees, and the included angle between the rubber supporting part and the plane body is less than 180 degrees; the framework is made of hard materials; the framework is arranged on the plane body and the outer lip edge and is trapped inside the plane body and the outer lip edge; the plane body is arranged between the outer lip edge and the rubber supporting part, and the thickness of the plane body is greater than that of the framework; the outer lip edge is arranged at one end of the excircle of the plane body, and the width and the thickness of the outer lip edge are matched with those of the sealing ring mounting groove on the outer ring; the distance from the outer circumference of the outer lip edge to the inner circumference of the inner lip edge is greater than the distance from the bottom of the sealing ring mounting groove on the outer ring to the bottom of the sealing ring mounting groove on the inner ring; the notch is arranged on the inner side of the rubber supporting part, is V-shaped, C-shaped or concave, and has the depth larger than one half of the thickness of the rubber supporting part; the rubber support part is arranged at the outer side of the plane body or the joint of the rubber support part and the plane body or the rubber support part is positioned at one end of the plane body, and the depth of the rubber support part is less than two thirds of the thickness of the plane body.

2. A rolling bearing seal structure according to claim 1, characterized in that: the width of the sealing ring mounting groove on the inner ring is equal to the width of the lip edge in the sealing ring.

3. A rolling bearing seal structure according to claim 1, characterized in that: and the channels on the outer ring and the inner ring are positioned at the same axial position.

4. A rolling bearing seal structure according to claim 1, characterized in that: the width of the sealing ring mounting groove on the outer ring is equal to the width of the outer lip edge of the sealing ring.

5. A rolling bearing seal structure according to claim 1, characterized in that: the rolling bodies are spheres.

6. A rolling bearing seal structure according to claim 1, characterized in that: the inner lip edge, the rubber supporting part, the plane body and the outer lip edge are made of rubber materials.