KR20170045530A

KR20170045530A - A rolling bearing and seal for rolling bearing

Info

Publication number: KR20170045530A
Application number: KR1020150145183A
Authority: KR
Inventors: 이재혁
Original assignee: 셰플러코리아(유)
Priority date: 2015-10-19
Filing date: 2015-10-19
Publication date: 2017-04-27

Abstract

The rolling bearing of the present invention comprises: an outer ring which has an orbit and a first seal insertion unit concavely formed on an internal side in a radial direction on both sides of the orbit; an inner ring which has an orbit and a second seal insertion unit concavely formed on an external side in a radial direction on both sides of the orbit; a rolling body placed in between the inner ring and the outer ring; a retainer which keeps an interval of the rolling body; and a seal installed to seal an opening unit in between the inner ring and the outer ring. The seal comprises: a first seal member; and a second seal member. The first seam member comprises: a ring-shaped first reinforcing member; and a first main frame. The first main frame is formed to wrap around at least a part of the first reinforcing member. The external diameter side is inserted into the first seal insertion unit. The second seal member comprises: a ring-shaped second reinforcing member; and a second main frame. The second main frame is formed to wrap around at least a part of the second reinforcing member. The internal diameter side is inserted into the second seal insertion unit. The present invention aims to provide a rolling bearing and a seal for the rolling bearing, which prevents a lifetime from being reduced due to abrasions of a seal lip.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rolling bearing and a rolling bearing,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rolling bearing and a bearing for a rolling bearing, and more particularly, to a rolling bearing and a rolling bearing seal which are composed of two seals and are provided for sealing between the inner and outer rings.

A typical bearing is a mechanical element provided between the shaft and the housing and rotatably supporting a load acting on the shaft or the housing.

1 to 3, the bearing includes an outer ring 3 inserted into the housing, an inner ring 5 into which the shaft is inserted, and an outer ring 3 between the outer ring 3 and the inner ring 5, A plurality of rolling elements 7 for rotatably supporting the inner ring 5 and a retainer 9 for maintaining a constant distance between the rolling elements 7; And a seal 10 installed at the opening between the inner ring 5 and the outer ring 3 to prevent foreign matter from entering the space between the inner ring 5 and the outer ring 3 and to prevent the lubricant from being leaked to the outside.

The outer ring 3 is formed with a first seal insertion portion 31 concaved toward radial directions (longitudinal direction in FIG. 2) on both sides of the raceway. The inner ring (5) is provided with a seal groove portion (51) which is in contact with radially inner side of the seal (10) on both sides of the raceway.

The seal 10 is provided on both sides of the rolling member 7 between the inner ring 5 and the outer ring 3. 3, the conventional seal 10 for a rolling bearing is composed of a main body 11 and a reinforcing member 13. As shown in Fig.

The reinforcing member 13 is annular and has a radially outer end bent inward in the axial direction. The main body 11 is formed in an annular shape and includes an insertion portion 11-1 and a seal lip portion 11-3. The main body 11 is provided so as to surround a part or all of the reinforcing member 13. The insertion portion 11-1 is provided on the radially outer side of the main body 11 and the seal lip portion 11-3 is provided on the radially inner side of the main body 11. [

The insertion portion 11-1 of the seal 10 is inserted into the first seal insertion portion 31 of the outer ring 3 and the seal lip portion 11-3 is inserted into the seal groove portion 51 of the inner ring 5 Respectively.

The seal lip portion of the conventional rolling bearing seal has a problem that the seal lip portion of the inner ring is not machined smoothly and wear occurs well and a certain amount of interference is not generated due to the dimensional tolerance and wear occurs. Further, when the bearing is rotated, leakage of grease occurs through the seal lip portion.

Korean Patent Registration No. 10-0925380 (Oct. 30, 2009)

Disclosure of Invention Technical Problem [8] The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide a seat for a motor vehicle which is made up of two seals and is sealed between an inner ring and an outer ring to prevent leakage due to grease- There is a need for a rolling bearing and a rolling bearing seal which are prevented from shortening.

The rolling bearing of the present invention comprises an outer ring formed with a raceway and having a first seal inserting portion recessed radially inwardly on both sides of the raceway and an inner ring formed with a raceway and having a second seal inserting portion recessed radially outward on both sides of the raceway, A rolling member provided between the inner ring and the outer ring, a retainer for maintaining a gap between the rolling members, and a seal provided for sealing the opening between the inner ring and the outer ring,

Wherein the seal comprises a first seal member and a second seal member which are in contact with each other;

Wherein the first seal member comprises an annular first reinforcing member and a first body; The first main body is provided to surround at least a part of the first reinforcing member, the outer diameter side is inserted into the first seal inserting portion,

The second seal member comprises a ring-shaped second reinforcement member and a second body; Wherein the second body is provided to surround at least a part of the second reinforcing member, and the inner diameter side is inserted into the second seal inserting portion.

The inner diameter side of the first seal member is provided in contact with the outer side in the axial direction of the second reinforcement member and the outer diameter side of the second seal member is provided in contact with the inner side in the axial direction of the first reinforcement member.

In the above, the first reinforcing member is exposed inward in the axial direction, and the second body is provided in contact with the axial inner side surface of the first reinforcing member; The second reinforcing member is exposed outward in the axial direction and the first body is provided in contact with the axial outer surface of the second reinforcing member.

The first seal lip is provided on the inner diameter side of the first body, and the first seal lip is inclined inward in the axial direction so as to contact the second reinforcement member.

A second seal lip is provided on an outer diameter side of the second body, and the second seal lip is formed to be inclined outward in the axial direction so as to be in contact with the first reinforcement member.

In the above, the first seal lip abuts the axial outer surface of the second reinforcing member; And the second seal lip is in contact with the axial inner surface of the first reinforcing member.

In the above, the first reinforcing member is exposed axially outward, and the second reinforcing member is exposed axially inward;

The first seal lip is provided on the inner diameter side of the first body, and the first seal lip is inclined outwardly in the axial direction so as to abut the axial inner side surface of the second reinforcement member;

And a second seal lip is provided on an outer diameter side of the second body and the second seal lip is inclined inward in the axial direction so as to be in contact with an outer surface of the first reinforcement member.

The first body is provided with a first insert part on an outer diameter side thereof, and the first insert part has an axial outer side surface formed with a concave first groove part;

The second body is provided with a second insert part on the inner diameter side and the second insert part is formed with a concave second groove part on the axial outer side surface.

The rolling bearing seal of the present invention is characterized in that the rolling bearing seals comprise an outer ring, an inner ring, a rolling member provided between the inner ring and the outer ring, a retainer for maintaining the gap between the rolling members, and an opening between the inner ring and the outer ring A seal for a rolling bearing,

Wherein the seal comprises a first seal member and a second seal member;

Wherein the first seal member comprises a first reinforcing member in an annular shape and a first body provided so as to surround an axial outer side surface of the first reinforcing member;

The second seal member comprises a second reinforcing member in an annular shape and a second body provided to enclose an axial inner side surface of the second reinforcing member;

The first seal is inserted into the first seal inserting portion on the outer diameter side of the first main body when the bearing is installed and the first seal lip is provided on the inner diameter side of the first main body in contact with the second reinforcement member;

Wherein the second body is provided on the inner diameter side with a second inserting portion and inserted into the second seal inserting portion and the second seal is provided on the outer diameter side of the second body in contact with the first reinforcing member. Provide a seal.

In the above, the first seal lip is formed to be inclined inward in the axial direction; And the second seal lip is formed to be inclined outward in the axial direction.

The first seal member may include a first reinforcing member in an annular shape and a first body to enclose an axial inner side surface of the first reinforcing member; The second seal member comprises a second reinforcing member in an annular shape and a second body provided so as to surround an axial outer side surface of the second reinforcing member;

The first seal lip is formed to be inclined axially outwardly; And the second seal lip is formed to be inclined inward in the axial direction.

The rolling bearing and rolling bearing seals according to the present invention are composed of a plurality of seals inserted into the seal inserting portions of the inner and outer rings, respectively, to prevent leaking due to the grease sagging phenomenon occurring during rotation of the bearings, And the inflow of foreign matter such as water is prevented. Each of the seal lip portions is positioned so as to be in contact with the facing reinforcing member, thereby reducing the rotational torque during rotation of the bearing and preventing the life of the seal due to wear of the seal lip portion from being shortened.

1 is an exploded perspective view illustrating a structure of a bearing,
Fig. 2 is a sectional view showing a part of the bearing,
3 is a cross-sectional view showing a cross section of a conventional rolling bearing seal,
4 is a cross-sectional view showing a partial cross-section of a rolling bearing according to the present invention,
5 is a cross-sectional view of a seal for a rolling bearing according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a seal for a rolling bearing and a rolling bearing according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a cross-sectional view showing a partial cross-section of a rolling bearing according to the present invention, and FIG. 5 is a cross-sectional view showing a cross-section of a rolling bearing seal according to the present invention. 4 and 5, the seal for a rolling bearing according to the present invention is shown to overlap the state before the seal is deformed.

Hereinafter, in Fig. 4, the vertical direction is referred to as "radial direction" and the horizontal direction is referred to as "axial direction".

The rolling bearing seal 100 according to the present invention is provided in an annular shape. The seal 100 includes a first seal member 110 and a second seal member 130. The first seal member 110 and the second seal member 130 are provided in contact with each other.

The first seal member 110 is provided in an annular shape. The first seal member 110 includes a first reinforcing member 117 and a first main body 113. The first reinforcing member 117 is provided in an annular shape. The first reinforcing member 117 is made of a metal. The radially outer end of the first reinforcing member 117 is bent inward in the axial direction. The inner diameter side end portion of the first reinforcing member 117 is radially outwardly spaced from the outer diameter side end portion of the second reinforcing member 137 of the second seal member 130. The first reinforcing member 117 may be axially outwardly spaced apart from the second reinforcing member 137 and partially overlapped. A second seal lip (1333) of the second seal member (130) is provided in contact with an axially inner side surface of the first reinforcement member (117).

The first body 113 is formed in an annular shape. The first body 113 is provided to surround at least a part of the first reinforcing member 117. The first main body 113 is provided to surround the axially outer side surface and the radially outer side end of the first reinforcing member 117 so that the first reinforcing member 117 is exposed inward in the axial direction. The first main body 113 is made of an elastomeric material (e.g., rubber, plastic, or the like).

The first body 113 includes a first insertion portion 1131 and a first seal lip 1133. The first insertion portion 1131 is provided on the outer diameter side of the first body 113. The first inserting portion 1131 is protruded radially outward from the first body 113. A concave first groove portion 1135 is formed on the outer side in the axial direction of the first insertion portion 1131. There is an effect that the first insertion portion 1131 can be easily inserted into the first seal insertion portion 31 of the outer ring 3 when the first groove portion 1135 is formed.

The first seal lip 1133 is provided on the inner diameter side of the first main body 113. The first seal lip 1133 extends radially inwardly from the first body 113. The first seal lip 1133 is formed to be inclined inward in the axial direction. The radially inner end of the first seal lip 1133 is provided in contact with the second reinforcement member 137 of the second seal member 130. The first seal lip 1133 is provided in contact with the axial outer surface of the second reinforcement member 137.

The second seal member 130 is formed in an annular shape. The second seal member 130 includes a second reinforcement member 137 and a second body 133. The second reinforcement member 137 is formed in an annular shape. The second reinforcing member 137 is made of a metal. The outer diameter side end portion of the second reinforcing member 137 is radially inwardly spaced from the inner diameter side end portion of the first reinforcing member 117. The second reinforcement member 137 may be spaced axially inward from the first reinforcement member 117 and partially overlap the first reinforcement member 117. The radial length of the second reinforcing member 137 is preferably shorter than the radial length of the first reinforcing member 1137. The first reinforcement member 1337 is provided on the axially outer surface thereof with the first seal lip 1133 in contact therewith.

The second body 133 is formed in an annular shape. The second body 133 is provided to surround at least a part of the second reinforcing member 137. The second body 133 is provided so as to enclose the inner side surface in the axial direction of the second reinforcement member 137 so that the second reinforcement member 137 is exposed axially outward. The second body 133 is made of an elastomeric material (e.g., rubber, plastic, or the like).

The second body 133 is provided with a second insertion portion 1331 and a second seal lip 1333. The second insertion portion 1331 is provided on the inner diameter side of the second body 133. The second inserting portion 1331 protrudes radially inward from the second body 133. A concave second groove 1335 is formed on the axially outer side of the second insert 1331. There is an effect that the second insertion portion 1331 is easily inserted into the second seal insertion portion 51 of the inner ring 5 when the second groove 1335 is formed.

The second seal lip 1333 is provided on the outer diameter side of the second body 133. The second seal lip 1333 extends radially outward from the second body 133. The second seal lip 1333 is formed to be inclined outwardly in the axial direction. The radially outer end of the second seal lip 1333 is provided in contact with the first reinforcement member 117. The second seal lip 1333 is provided in contact with the axial inner surface of the first reinforcing member 117.

The radial length of the first seal member 110 is longer than the radial length of the second seal member 130. The radial length of the first seal member 110 may be equal to or shorter than the radial length of the second seal member 130. As the position where the first seal lip 1133 overlaps with the second seal lip 1333 is closer to the inner side in the radial direction of the seal 100, the rotational torque during the rotation of the bearing is small, so that the radial length of the first seal member 110 The length of the second seal member 130 is longer than the length of the second seal member 130 in the radial direction.

The method of assembling the seal 100 for a rolling bearing according to the present invention is such that after inserting the second insertion portion 1331 of the second seal member 130 into the second seal insertion portion 51 of the inner ring 5, 1 Insert the first insertion portion 1131 of the seal member 110 into the first seal insertion portion 31 of the outer ring 3 and assemble. The rolling bearing seal 100 may be assembled to one opening or both openings between the inner ring 5 and the outer ring 3 of the bearing.

The deformation of the seal 100 for a rolling bearing according to the present invention is such that the exposed surface of the first reinforcing member 117 of the first seal member 110 and the second reinforcing member 137 of the second seal member 130 Or may be provided in the reverse order to the above.

The first seal member 110 is provided in an annular shape. The first seal member 110 includes a first reinforcing member 117 and a first main body 113. The first reinforcing member 117 is provided in an annular shape. The first reinforcing member 117 is made of a metal. The inner diameter side end portion of the first reinforcing member 117 is radially inwardly spaced from the outer diameter side end portion of the second reinforcing member 137 of the second seal member 130. The first reinforcing member 117 may be spaced axially inward from the second reinforcing member 137 and partially overlap. A second seal lip 1333 of the second seal member 130 is in contact with the axial outer surface of the first reinforcement member 117.

The first body 113 is formed in an annular shape. The first main body 113 is provided so as to surround the axially inner side surface and the radially outer end of the first reinforcing member 117 so that the first reinforcing member 117 is axially outward exposed.

The first seal lip 1133 is provided on the inner diameter side of the first main body 113. The first seal lip 1133 extends radially inwardly from the first body 113. The first seal lip 1133 is formed to be inclined outwardly in the axial direction. The radially inner end of the first seal lip 1133 is provided in contact with the second reinforcement member 137 of the second seal member 130. The first seal lip 1133 is provided in contact with the inner side surface in the axial direction of the second reinforcement member 137.

The second seal member 130 is formed in an annular shape. The second seal member 130 includes a second reinforcement member 137 and a second body 133. The second reinforcement member 137 is formed in an annular shape. The second reinforcing member 137 is made of a metal. The outer diameter side end portion of the second reinforcing member 137 is radially inwardly spaced from the inner diameter side end portion of the first reinforcing member 117. The second reinforcement member 137 may be spaced axially outward from the first reinforcement member 117 to partially overlap the first reinforcement member 117. The radial length of the second reinforcing member 137 is preferably shorter than the radial length of the first reinforcing member 1137. The first reinforcement member 1337 is provided on the inner side surface in the axial direction with the first seal lip 1133 in contact therewith.

The second body 133 is formed in an annular shape. The second body 133 is provided so as to surround the axial outer side surface of the second reinforcing member 137, and the second reinforcing member 137 is exposed inward in the axial direction.

The second seal lip 1333 is provided on the outer diameter side of the second body 133. The second seal lip 1333 extends radially outward from the second body 133. The second seal lip 1333 is formed to be inclined inward in the axial direction. The radially outer end of the second seal lip 1333 is provided in contact with the first reinforcement member 117. The second seal lip 1333 is provided in contact with the axial outer surface of the first reinforcement member 117.

The method of assembling the modified rolling bearing seal 100 according to the present invention is such that the first insertion portion 1131 of the first seal member 110 is inserted into the first seal insertion portion 31 of the outer ring 3 The second insertion portion 1331 of the second seal member 130 can be inserted into the second seal insertion portion 51 of the inner ring 5 and assembled.

Although the rolling bearing and rolling bearing seals according to the present invention have been described with reference to the embodiments shown in the drawings, it is to be understood that they are merely illustrative and that various modifications and equivalents of other embodiments may be made by those skilled in the art I will understand. Accordingly, the scope of the true technical protection should be determined by the technical idea of the appended claims.

100: Seals for rolling bearings
110: first seal member 113: first main body
1131: first insertion portion 1133: first seal lip
1135: first groove portion 117: first reinforcing member
130: second seal member 133: second body
1331: second inserting portion 1333: second sealer
1335: second groove portion 137: second reinforcing member

Claims

(3) in which a first seal insertion portion (31) is concavely formed in a radially inward side of both sides of a track and a second seal insertion portion (51) is formed on a radially outer side of both sides of the track, A retainer 9 for retaining the distance between the rolling elements 7 and a ring gear 7 for retaining a space between the inner ring 5 and the outer ring 3, (100) provided for sealing an opening between an outer ring (5) and an outer ring (3), characterized in that the rolling bearing
The seal 100 comprises a first seal member 110 and a second seal member 130 which are in contact with each other;
The first seal member 110 is composed of a first reinforcing member 117 in an annular shape and a first body 113; The first main body 113 is provided to surround at least a part of the first reinforcing member 117, and the outer diameter side is inserted into the first seal insertion portion 31;
The second seal member 130 is composed of a ring-shaped second reinforcement member 137 and a second body 133; Wherein the second body (133) is provided to surround at least a part of the second reinforcing member (137), and the inner diameter side is inserted into the second seal insertion portion (51).

The seat according to claim 1, wherein an inner diameter side of the first seal member (110) is provided in contact with an axially outer side of the second reinforcement member (137), and an outer diameter side of the second seal member Of the rolling bearing.

2. The connector according to claim 1, wherein the first reinforcing member (117) is exposed axially inward, the second body (133) is provided in contact with the axial inner surface of the first reinforcing member (117) Wherein the second reinforcing member (137) is exposed axially outward and the first body (113) is provided in contact with the axial outer surface of the second reinforcing member (137).

The seat according to claim 1, wherein a first seal lip (1133) is provided on an inner diameter side of the first body (113), and the first seal lip (1133) is inclined inward in the axial direction so that the second reinforcement member Contact;
Wherein a second seal lip 1333 is provided on an outer diameter side of the second body 133 and the second seal lip 1333 is inclined outward in the axial direction so as to be in contact with the first reinforcement member 117 bearing.

The connector according to claim 4, wherein the first seal lip (1133) abuts the axial outer surface of the second reinforcement member (137); And the second seal lip (1333) is in contact with the axial inner surface of the first reinforcement member (117).

2. The apparatus of claim 1, wherein the first reinforcing member (117) is exposed axially outward and the second reinforcing member (137) is exposed axially inward;
A first seal lip 1133 is provided on an inner diameter side of the first body 113 and the first seal lip 1133 is inclined outward in the axial direction so as to abut on the axial inner side surface of the second reinforcement member 137 ;
A second seal lip 1333 is provided on the outer diameter side of the second body 133 and the second seal lip 1333 is inclined inward in the axial direction so as to be in contact with the outer surface of the first reinforcement member 117 Rolling bearings with.

The connector according to claim 1, wherein the first body (113) is provided with a first insertion portion (1131) on the outer diameter side, and a first recessed portion (1135) is formed on the axially outer side surface of the first insertion portion ;
Wherein a second insertion portion 1331 is provided on an inner diameter side of the second body 133 and a second recessed portion 1335 is formed on an axial outer side surface of the second insertion portion 1331. [ bearing.

A rolling member 7 provided between the inner ring 5 and the outer ring 3 and a retainer 9 for maintaining the interval between the rolling members 7, , The seal (100) for rolling bearings assembled at any position of the opening between the inner ring (5) and the outer ring (3)
The seal 100 comprises a first seal member 110 and a second seal member 130;
The first seal member 110 is composed of a first reinforcing member 117 in an annular shape and a first main body 113 enclosing an axial outer side surface of the first reinforcing member 117;
The second seal member 130 is composed of a ring-shaped second reinforcement member 137 and a second body 133 which is provided to enclose the axial inner side surface of the second reinforcement member 137;
The first seal 1133 is inserted into the first seal insertion portion 31 and the first seal lip 1133 is inserted into the inner diameter side of the first main body 113. [ And is provided in contact with the second reinforcing member 137;
A second seal 1333 is provided on the inner diameter side of the second body 133 and inserted into the second seal insertion portion 51. A second seal lip 1333 is provided on the outer diameter side of the second body 133 And is provided in contact with the first reinforcing member (117).

9. The connector according to claim 8, wherein the first seal lip (1133) is formed to be inclined inwardly in the axial direction; And the second seal lip (1333) is formed to be inclined outwardly in the axial direction.

The first seal member (110) according to claim 8, wherein the first seal member (110) comprises a first reinforcing member (117) in an annular shape, and a first body (113) surrounding the axially inner side surface of the first reinforcement member Lt; / RTI > The second seal member 130 is composed of a ring-shaped second reinforcement member 137 and a second body 133 that surrounds the axially outer side surface of the second reinforcement member 137;
The first seal lip 1133 is formed to be inclined outwardly in the axial direction; And the second seal lip (1333) is formed to be inclined inward in the axial direction.