KR101756543B1 - Rolling bearing and Seal for rolling bearing - Google Patents

Rolling bearing and Seal for rolling bearing Download PDF

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Publication number
KR101756543B1
KR101756543B1 KR1020150145620A KR20150145620A KR101756543B1 KR 101756543 B1 KR101756543 B1 KR 101756543B1 KR 1020150145620 A KR1020150145620 A KR 1020150145620A KR 20150145620 A KR20150145620 A KR 20150145620A KR 101756543 B1 KR101756543 B1 KR 101756543B1
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KR
South Korea
Prior art keywords
seal
outer ring
axially
inner end
radially
Prior art date
Application number
KR1020150145620A
Other languages
Korean (ko)
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KR20170045661A (en
Inventor
정지원
김병국
최윤석
Original Assignee
셰플러코리아(유)
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Priority to KR1020150145620A priority Critical patent/KR101756543B1/en
Publication of KR20170045661A publication Critical patent/KR20170045661A/en
Application granted granted Critical
Publication of KR101756543B1 publication Critical patent/KR101756543B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Abstract

A rolling bearing according to the present invention comprises an inner ring, an outer ring provided on a radially outer side of the inner ring and having a seal insertion surface formed radially inward, a rolling member provided between the inner ring and the outer ring, And a seal formed of a body and a reinforcing member, wherein the seal comprises: Wherein the main body has a seat portion that is inserted into a seal insertion surface on a radially outer side, and the seat portion is formed with a shock absorbing groove formed as one side thereof.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing and a bearing for a rolling bearing, and more particularly, to a bearing for a rolling bearing provided between an inner ring and an outer ring for sealing, and a rolling bearing having the bearing.

Generally, a rolling bearing is a device for rotatably supporting a shaft by rolling contact using a rolling member such as a ball or a roller.

1 and 2, a rolling bearing 1 has a structure in which a plurality of rolling elements 17 are arranged between an inner ring 11 and an outer ring 13 and a plurality of rolling elements 17 arranged between an inner ring 11 and an outer ring 13, And a seal (15) that covers the lateral opening to perform sealing.

Korean Unexamined Patent Application Publication No. 2003-0021419 (Mar. 15, 2003) filed on March 15, 2003 discloses a rolling bearing sealing device. FIG. 3 is a partial cross-sectional view showing a conventional rolling bearing, and FIG. 4 is a partial cross-sectional view showing an inner ring, an outer ring and a seal in FIG.

In FIGS. 3 and 4, the seal provided on the bearing shows the shape before deformation to be overlapped with the outer and inner rings.

3 and 4, a conventional rolling bearing 1 includes a retainer 19 for holding a rolling member 17 provided between an inner ring 11 and an outer ring 13 at a predetermined interval .

The seal 15 is composed of a main body 153 and a reinforcing member 151. The reinforcing member 151 is formed in an annular shape, and the radially outer end portion is bent and extended inward in the axial direction. The reinforcing member 151 is made of a metal material. The main body 153 is formed in an annular shape and includes a seat portion 1533 and a seal lip portion 1531. The main body 153 is provided so as to surround a part of the axial inner side surface of the reinforcing member 151 and the axial outer side surface. The main body 153 is made of an elastomeric material such as rubber.

The seal lip portion 1531 is provided radially inward of the body 153 and is branched and extended. The end of the seal lip portion 1531 is in close contact with the outer diameter surface of the inner ring 11. The seat portion 1533 is provided on the radially outer side of the main body 153 and is inserted into the seal insertion surface 131 of the outer ring 13. The seal insertion surface 131 is recessed and formed in the radially inner side of the outer ring 13.

The rolling bearing seal 15 is formed such that the volume of the seating portion 1533 is relatively larger than the groove of the seal insertion surface 131 of the outer ring 13 so that when the outer ring 13 and the seal 15 are assembled, There is a problem in that the assembly is difficult to assemble due to excessive resistance and the module 150 is not firmly fixed on the seal insertion surface 131 after assembly due to excessive deformation of the mounting portion 1533. Further, when the size of the seat part 1533 is reduced, there is a problem that the seat part 1533 can not be closely attached to the seal insertion surface 131 and is easily separated.

Korean Patent Publication No. 2003-0021419 (Mar. 15, 2003)

In order to solve such conventional problems, the present invention provides a rolling bearing and a bearing for a rolling bearing in which a pressing force is reduced when assembling an outer ring and a seal, and a contact area between the outer ring and the seal is increased.

According to another aspect of the present invention, there is provided an internal combustion engine including an inner ring, an outer ring provided radially outwardly of the inner ring and having a seal insertion surface formed radially inward, a rolling member provided between the inner ring and the outer ring, And a seal formed of a body and a reinforcing member, the sealing being performed between the body and the reinforcing member; Wherein the main body has a seat portion that is inserted into a seal insertion surface on a radially outer side, and the seat portion is formed with a shock absorbing groove formed as one side thereof.

In this case, the outer surface of the seat portion is curved outwardly and is provided in contact with the seal insertion surface.

In the above, the buffer groove is axially outwardly opened.

The reinforcing member may include a first bent portion that is axially outwardly inclined and extended in a radially outward direction, and a radially inner surface of the reinforcing member is formed in parallel with the first bent portion.

The seat portion is characterized in that the seat portion is provided with a locking portion that is bent and extended toward the axially outward side.

In the above, the radially inner surface of the buffer groove is formed by the radially outer surface of the first bent portion.

Wherein the seating portion has a first curved surface that is convexly curved outwardly in the radial direction at an axially inner end of the outer surface of the engagement portion, the engagement portion being located radially inward from the outer diameter of the seating portion; The outer ring having a seating surface extending radially inwardly from an axially inner end of the seal insertion surface; The axial direction distance from the horizontal plane to the axially inner side end portion of the engaging portion is larger than the axial distance from the bearing surface of the outer ring to the axially inner side end portion of the guide surface, Directional distance of the light source.

A seal for a rolling bearing, the seal being formed between an inner ring and an outer ring to perform sealing, the seal comprising: a body and a reinforcing member; Wherein the main body has a seating portion inserted radially outward into a seal insertion face of the outer ring, and the seating portion is formed with a cushioning groove formed at one side thereof.

In the above, the buffer groove is opened axially outward, and the reinforcing member has a first bend extending radially outwardly and axially inwardly inclined and bent; And a radially inner surface of the buffer groove is formed in parallel with the first bent portion.

And the seating part is provided with a locking part which is bent at an end portion thereof in an axially outward direction.

The rolling bearing and rolling bearing seals according to the present invention reduce the pressing force when assembling the outer ring and the seal to facilitate assembly, minimize deformation during assembly, and firmly fix the seal on the seal insertion surface after assembly.

In addition, it is possible to reduce the thickness in the axial direction of the seat portion, thereby increasing the allowable allowable width of the internal design of the bearing, increasing the contact area between the outer ring and the seal with respect to the volume of the seal, improving the fixing force, And the deviation of the seal due to vibration is prevented.

1 is a perspective view showing a conventional rolling bearing,
FIG. 2 is a perspective view of a conventional rolling bearing partially cutaway,
3 is a partial sectional view showing a conventional rolling bearing,
Fig. 4 is a partial sectional view showing the inner ring, the outer ring and the seal in Fig. 3,
5 is a partial cross-sectional view showing a rolling bearing according to an embodiment of the present invention,
Fig. 6 is an exploded sectional view of Fig. 5,
7 is a cross-sectional view illustrating a seal for a rolling bearing according to an embodiment of the present invention,
FIG. 8 is a partial cross-sectional view showing a rolling bearing according to a modification of FIG. 5;

Hereinafter, a detailed description will be given of a rolling bearing and a seal for a rolling bearing with reference to the accompanying drawings.

FIG. 5 is a partial sectional view showing a rolling bearing according to an embodiment of the present invention, FIG. 6 is an exploded sectional view of FIG. 5, and FIG. 7 is a sectional view showing a roller bearing bearing according to an embodiment of the present invention .

In Figs. 5 and 8, the seal provided on the bearing shows the shape before deformation to be overlapped with the outer ring and the inner ring.

The horizontal direction in Fig. 5 is the radial direction, and the vertical direction is the axial direction.

5 to 7, the rolling bearing 7 according to the embodiment of the present invention includes an inner ring 71, a radially outer side of the inner ring 71, (Not shown) provided between the inner ring 71 and the outer ring 73 and the outer ring 73 provided between the inner ring 71 and the outer ring 73 to perform sealing And a seal (9) composed of a main body (93) and a reinforcing member (91).

A retainer (not shown) is provided between the inner ring 71 and the outer ring 73 to maintain the spacing between the rolling elements arranged along the trajectory. A plurality of rolling elements are arranged between the raceway of the inner ring 71 and the raceway of the outer ring 73 and the raceway of the inner ring 71 and the raceway of the outer ring 73 are arranged on both sides in the axial direction of the rolling body A seal 9 is provided.

The body 93 of the seal 9 has a seat 933 which is inserted radially outward into the seal inserting surface 735 and a shock absorbing groove 935 is formed in the seat 933, . The outer surface of the seating portion 933 is curved outwardly and is provided in contact with the seal insertion surface 735 when installed in the bearing. The main body 93 is annular and is provided to surround the radially inner and outer ends of the reinforcing member 91 and the axial outer surface. The body 93 may be made of a soft material such as rubber. The main body 93 may be provided to further cover all or a part of the inner surface of the reinforcing member 91 in the axial direction.

A guide surface 731 extending inward from the axially outer side is formed on the inner diameter surface of the outer ring 73 facing the inner ring 71 in the radial direction and is inclined outwardly in the radial direction from the axially inner end of the guide surface 731 The inclined surface 733 is formed. The seal insertion surface 735 is recessed radially outwardly from the axially inner end of the inclined surface 733 and has a seating surface 737 extending radially inward from the axially inner end of the seal insertion surface 735 Is formed.

The seating portion 933 has a locking portion 9331 which is bent and extended toward the axially outward side at the end portion. The seating portion 933 is formed with a first curved surface 9333 which is convexly curved outward in the radial direction at the axially inner end of the outer surface of the engagement portion 9331. [ The first curved surface 9333 is brought into tight contact with the inclined surface 733 of the outer ring 73 when the seal 9 is assembled to the outer ring 73. The latching portion 9331 is formed at a position radially inward from the outer diameter of the seat portion 933. [ The seating portion 933 has a structure protruding more radially outward than the engaging portion 9331.

A second curved surface 9335 extending axially inwardly from the axially inner end of the first curved surface 9333 and extending radially outward is extended. The second curved surface 9335 is brought into tight contact with the seal insertion surface 735 of the outer ring 73 when the seal 9 is assembled to the outer ring 73. A horizontal surface 9337 extending radially inwardly from the axially inner end of the second curved surface 9335 is extended. The horizontal surface 9337 is brought into close contact with the seating surface 737 of the outer ring 73 when the seal 9 is assembled to the outer ring 73. The distance from the horizontal surface 9337 to the axially inner end of the engaging portion 9331 is formed to be smaller than or equal to the distance from the seating surface 737 of the outer ring 73 to the axially inner end of the guide surface 731.

Since the end portion of the seat portion has an axially outwardly directed engagement portion, when the seat portion is inserted into the seal insertion groove, a gap that may be generated between the seat portion and the guide surface can be minimized.

The reinforcement member 91 has an annular shape and is provided inside the body 93 of the seal 9 to maintain the shape of the body 93 and to reinforce the strength. The reinforcing member 91 may be made of a steel material such as synthetic resin or metal.

The reinforcing member 91 has a first bending portion 913 which extends radially outwardly in an axial direction and has a second bending portion 911 which extends inwardly in an axial direction Respectively.

The first bent portion 913 and the second bent portion 911 are both bent in the same direction, that is, in the axial direction. 7, the first bent portion 913 extends in the axial direction from the radially outer end of the reinforcing member 91 and the second bent portion 911 extends radially inward of the reinforcing member 91 And extends in the axial direction from the end portion.

The bending angle a of the first bent portion 913 and the bending angle b of the second bent portion 911 are formed at an acute angle and smaller than 45 °. The first bent portion 913 has an inclined and radially outward facing outer surface and an inclined inner surface facing radially.

The structure in which both the first bent portion 913 and the second bent portion 911 are bent inward in the axial direction minimizes deformation during assembly and improves structural stability. The inclined structure of the bent portion supports both axial and radial loads of the seal (9).

The buffer groove 935 is formed in the seating portion 933 so as to be axially outwardly open. Preferably, the radially inner surface 935a of the cushioning groove 935 is formed in a direction parallel to the first bent portion 913. The first bent portion 913 is exposed to the buffer groove 935 so that the radially inner surface 935a of the buffer groove 935 may be formed as the radially outer surface 913a of the first bent portion 913. [

When the seal ring 9 is assembled to the outer ring 73, the body 93 of the soft material is deformed in response to the pressure input, and the buffer groove 935 serves to buffer the pressure input received by the body 93. The cushion groove 935 before the seal 9 is assembled to the outer ring 73 has a concave shape with a wide entrance side of the opening and the shape of the cushion 935 is reduced while assembling the seal 9 to the outer ring 73 The pressure input is buffered.

The opening direction of the shock absorbing groove 935 formed to be parallel to the bending direction of the first bending portion 913 in addition to the configuration of the first bending portion 913 is the same as the opening direction of the body 93 in assembling the outer ring 73 and the seal 9, The first bending portion 913 supports the pressure input received by the bending groove 935 as much as possible so that the seating portion 933 is deformed at the radially outer portion of the bending groove 935 to improve the fixing force.

The seating portion 933 formed with the buffer groove 935 reduces the pressing force when assembling the outer ring 73 and the seal 9 to facilitate assembly and minimizes deformation during assembly. As shown in Fig.

In addition, the seat 933 can be reduced in thickness in the axial direction, thereby increasing the allowable allowable width of the internal design of the bearing, increasing the contact area between the outer ring 73 and the seal 9 with respect to the volume of the seal 9, It improves fixing force and prevents seals from escaping due to internal pressure increase, axial load and vibration.

The main body 93 has a seal lip portion 931 extending from the radially inward end portion toward the end surface 711 of the inner ring 71. The seal lip portion 931 performs sealing by making close contact with the outer diameter surface 711 of the inner ring 71 while the seal 9 is fixed to the outer ring 73. The seal lip portion 931 may extend axially inwardly from the radially inward end of the body 93 in parallel with the bending direction of the second bent portion 911.

FIG. 8 is a partial cross-sectional view showing a rolling bearing according to a modification of FIG. 5; As shown in Fig. 8, the seal lip portions 9311 and 9313 are provided radially inward of the body 93, and the end portions can be extended. At least one of the seal lip portions 9311 and 9313 is in contact with the inner ring 71.

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.

7: Rolling bearings
71: inner ring 73: outer ring
731: guide surface 733: incline surface
735: seal inserting surface 737: seat surface
9: Seal
91: reinforcing member 913: first bent portion
911: second bent portion 93: main body
931: seal lip portion 933:
9331: engaging portion 9333: first bent surface
9335: 2nd curved surface 9337: Horizontal plane

Claims (10)

A rolling member provided between the inner ring 71 and the outer ring 73 and a rolling member provided between the inner ring 71 and the outer ring 73 and the outer ring 73 provided between the inner ring 71 and the outer ring 73, And a seal (9) provided between the main body (93) and the reinforcing member (91) to perform a sealing operation;
The outer ring 73 is provided with a guide surface 731 extending inward from the axial direction and an inclined surface 733 extending radially outwardly from the axially inner end of the guide surface 731, A radially outwardly curved seal-formed surface 735 formed radially outwardly from the inner end, and a seating surface 737 extending radially inwardly from the axially inner end of the seal-engaged surface 735;
The body 93 has a seat 933 inserted radially outwardly into the seal inserting surface 735 and a shock absorbing groove 935 formed in the seat 933 and opened axially outward, / RTI >
The seating portion 933 is provided with a locking portion 9331 at a position bent radially outwardly from the outer diameter of the seating portion 933 and extending toward the axially outward side at the end of the seating portion 933, Has a first curved surface 9333 curved convexly in the radial direction at the axially inner end of the outer surface of the portion 9331 and extends axially inwardly from the axially inner end of the first curved surface 9333, An outwardly curved second curved surface 9335 is extended and a horizontal surface 9337 extending radially inwardly from the axially inner end of the second curved surface 9335 is formed;
The reinforcing member (91) has a first bending portion (913) radially outwardly bent and extended inwardly in an axial direction at a bending angle (a) of less than 45 degrees;
The distance from the horizontal surface 9337 to the axially inner end of the engaging portion 9331 is formed to be smaller than or equal to the distance from the seating surface 737 of the outer ring 73 to the axially inner end of the guide surface 731, The first curved surface 9333 is brought into close contact with the inclined surface 733 of the outer ring 73 and the second curved surface 9335 is brought into close contact with the seal insertion surface 735 The horizontal surface 9337 is brought into close contact with the seating surface 737;
Wherein the first bent portion 913 is exposed to the buffer groove 935 such that the radially inner surface of the buffer groove 935 is formed as a radially outer surface 913a of the first bent portion 913. [ bearing. 2. The rolling bearing according to claim 1, wherein the reinforcing member (91) further comprises a second bending portion (911) extending radially inward and axially inwardly inclined. delete delete delete delete delete delete delete delete
KR1020150145620A 2015-10-19 2015-10-19 Rolling bearing and Seal for rolling bearing KR101756543B1 (en)

Priority Applications (1)

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KR1020150145620A KR101756543B1 (en) 2015-10-19 2015-10-19 Rolling bearing and Seal for rolling bearing

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Application Number Priority Date Filing Date Title
KR1020150145620A KR101756543B1 (en) 2015-10-19 2015-10-19 Rolling bearing and Seal for rolling bearing

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KR20170045661A KR20170045661A (en) 2017-04-27
KR101756543B1 true KR101756543B1 (en) 2017-07-10

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CN108916235B (en) * 2017-01-06 2020-06-09 南京溧水高新创业投资管理有限公司 High-speed washing machine bearing
IT202100011102A1 (en) * 2021-05-03 2022-11-03 Skf Ab SEALING DEVICE IN PLASTIC MATERIAL FOR BEARING UNIT

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