CN102352890A

CN102352890A - Combined sealing structure of bearing

Info

Publication number: CN102352890A
Application number: CN201110289578XA
Authority: CN
Inventors: 岳伟; 沈一定; 王进堂
Original assignee: 胡先根
Priority date: 2011-09-23
Filing date: 2011-09-23
Publication date: 2012-02-15

Abstract

The invention discloses a combined sealing structure of a bearing, and the combined sealing structure comprises a sealing ring mounted on an outer ring and a dustproof cover mounted on an inner ring. The sealing ring and a framework made of an elastic steel plate are fixed into a whole; the sealing ring is respectively matched with the inner wall of the outer ring of the bearing and the inner wall of the dustproof cover; and a gap channel with a changeable size is formed among the outer ring of the bearing, the sealing ring and the dustproof cover, and is connected with the outside. When the bearing is operated, the inner ring rotates to drive the dustproof cover to rotate to stop and throw most of slurry and dust; less slurry and dust can be allowed to enter into the gap channel; under the action of the centrifugal force, most of slurry and dust entering into the gap can thrown out of the gap channel; and less dust and slurry can be blocked by a sealing lip and can not enter into the seal ring, so that the structure provided by the invention plays roles in sealing and reducing friction. According to the structure provided by the invention, the dust and the slurry are dredged and blocked at the same time, the erosion to the sealing ring caused by the slurry and the dust is reduced, the sealing function of the bearing is completely realized, the service life of the sealing structure is greatly prolonged and the reliability of the bearing is improved.

Description

The combined sealing structure of bearing

Technical field

The present invention relates to a kind of sealing configuration of bearing, particularly a kind of on the little automobile chassis bearing of the inner axial space of bearing, the bearing combined sealing structure of use.

Background technique

The bearing of different working conditions, different structure is also different to the requirement of ring structure; But bearing sealed ring structural design and sealing effect will be the key factors that influences bearing quality, the combined sealing structure of existing bearing the serve as reasons seal ring of band skeleton and effective combination of dust cover more.

Chinese patent number 201020688971.7 " a kind of four lip seal circle assembly parties of automotive hub bearing " just provide a kind of seal ring assembly parts; Overcome former seal ring assembly parts and had unreasonable structure, the problem of fat phenomenon and locking phenomenon is more seriously leaked in easy generation.

Chinese patent number 201020504344.3 " a kind of double-row conical bearings of combination seal of dust cover band sealing lip "; The patent No. 201020231155.3 " double-row conical bearing of band combined seal ring "; The patent No. 201020504353.2 " a kind of double-row conical bearing with compound backbone sealing ring " all is the inner frame in the L type; After the dust cover of L type is provided with mutually; Place more than one seal ring betwixt in the cavity of Xing Chenging; Through dustproof line and a plurality of lip enhanced leaktightness more than erecting together, thereby prevent dust effectively; Mud sees through the gap and gets into bearing inside.

Its dominant ideas of above-mentioned patent are exactly that the quantity that increases dustproof line and lip is come enhanced leaktightness; The way of only taking to block up solves the inside that dust, mud, quarrel foreign material etc. get into bearing; So not only make the complex structure of combination seal, and bring great trouble for the manufacturing of bearing.Simultaneously because of the rubbish only import but no export in the bearing, using for a long time in the rear bearing can long-pending full rubbish, having increased friction and having strengthened use and the life-span that resistance directly influences bearing.

Summary of the invention

Technical problem to be solved by this invention is: a kind of combined sealing structure of bearing is provided, and it is simple in structure, reasonable in design, be prone to make, and is easy for installation, thoroughly solves the sealing problem of bearing, and good sealing effect has prolonged working life of bearing greatly.

The present invention addresses the above problem the technological scheme that is adopted: the combined sealing structure of bearing; Comprise the seal ring that is installed on the bearing outer ring and be installed in the integral body that the dust cover on the bearing inner race is combined into; Described seal ring becomes whole with the skeletal fixation of being made by spring steel plate; Seal ring cooperates with the internal surface of bearing outer ring and the internal surface of dust cover respectively; Form the clearance channel of size variation between said seal ring, dust cover and bearing outer ring, and clearance channel communicates with the external world.

Compared with prior art; The invention has the advantages that: this patent is according to transient equiliblium; A large amount of dusts, mud, foreign material are stopped and throw away; Only allow a spot of mud, dust, get into from little clearance aperture; And the mud, the dust that get into, because the brute force of sealing lip stops, when automobilism, bearing operation; Throw away with centrifugal force again, dredge like this and block up.Because of dust, the mud that gets in the dust cover is difficult for opening in the seal ring lip entering bearing less; Reduced the erosion of mud and dust again, fundamentally solved sealing problem, reduced friction sealing lip; Prolong the life-span of bearing seal structure greatly, and improved the reliability of bearing.Skeleton adopts the Steel Spring Plate material, little, the simple shape of axial dimension, and intensity is high, seal ring is had enough supports, so this combined sealing structure suits to install and use in the narrow and small especially place of bearing axial distance especially.Sealing lip is that sharp type pressure is concentrated the powerful intrusion that stops outside mud, dust of ability, and seal ring has the shank of the protruding circular arc ring of big thickness, thereby the pressure that has strengthened dust cover has guaranteed that sealing reliably.

Description of drawings

Fig. 1, structural representation of the present invention (enlarged view).

Fig. 2, user mode reference drawing of the present invention.

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are further described:

Skeleton 14 is processed by Steel Spring Plate medium-temperature tempering after quenching; The axial space that thin thickness, elasticity and intensity are good, shared is little; Rubber sealing ring there are enough supports; Suit especially in the especially little bearing of axial distance, to install and use, coat the fixing seal ring 2 that is made into by rubber of bonding at an one of which sidewall and an end.

It is pointed sealing lip 12 that one top is arranged respectively on the inner periphery of seal ring 2 and the head; The head seal lip is fixedly mounted in the caulking groove of outer ring 1 inwall; The sealing lip 12 and the dust cover 5 internal surface drive fits of inner periphery; Because of being that pointed and sealing surface surface of contact are little, lip contacts for line; Pressure is big; The powerful intrusion that stops outside mud, dust of ability, and the big pressure Xiao Yi of former lip area is invaded by mud.

Form between dust cover external diameter and bearing outer ring notch internal diameter mouth and import and export gap 3.

Form upper and

lower clearance seal

4,9 between the head surface of seal ring 2 and dust cover 5 and under seal ring shank 8 and the dust cover between internal surface; And the width of importing and exporting gap 3 and following clearance seal 9 is greater than the width a of clearance seal 4, and imports and exports gap 3 and last clearance seal 4 vertical communicating.

Exoskeletal support place of seal ring is that thickness is big; The arc annulus protruding to the dust cover direction is seal ring shank 8; Can store certain elastic force; Make seal ring be stamped certain pressure to preventing dust and guarantee its seal action, seal ring shank 8 ends form the seal ring inner ring with the dust cover corner and seal 10.

It is b that the seal ring centre has the internal surface centre of a ring groove and dust cover 5 that Extreme breadth is arranged, and enlarges the spatia 7 that dwindles again, the width b >=4～8a of said spatia gradually from top to bottom.

Between said seal ring, dust cover, outer ring 1 internal diameter mouth, the clearance channel that has formed size variation communicates with the external world, this gap passage available buffer and a certain amount of mud of storage and dust.

Clearance channel is made up of the passages of import and export sealing 3, upward clearance seal 4, spatia 7, clearance seal 9, seal ring inner ring sealing 10 perforations down.

The chamfering 13 of dust cover 5 inner radius is used to remove the burr of dust cover and guiding is installed, and a turnover inclined-plane 6 is arranged on the outer surface, increases the intensity of dust cover 5.

Seal ring 2 is installed on the outer ring 1 and is combined into combined sealing structure with the dust cover 5 that is installed on the inner ring 11, and inject viscosity at two sealing lips, 12 places higher, and be insoluble to acid, alkali, Yan Heshui, and the lubricating grease that is difficult for getting rid of carries out lubricated for a long time to sealing lip.

This combined sealing structure; Suit especially in the less bearing of axial distance, to install and use; And bearing is installed in again on the chassis of automobile; In environment, use with more dust and mud; Bearing travels and rotates with automobile; The inner ring rotation drives the dust cover rotation that is installed on the inner ring during bearing operation; In service because the rotation of bearing inner race and dust cover; The big outer surface of dust cover; A large amount of mud and dust are stopped and throw away; Only allow a spot of mud and dust to seal 3 through importing and exporting, on; Following clearance seal 4; 9 and spatia 7; In the seal ring inner ring sealing 10, can store a spot of mud and dust; Because stopping of sealing lip; Dust; Mud can not get in dust cover and the bearing, and throws away with the running of the operation bearing of automobile, thereby has guaranteed the sealing of bearing.

Because the rotation of inner ring and dust cover; Most of mud and the dust of storing in the spatia can be easy to throw away from import and export gap 3 through last clearance seal 4; Meanwhile also having a spot of mud and dust gets in the spatia 7 from importing and exporting gap location; So constantly circulation have dredge have stifled; Having into has; Reach transient equiliblium veritably; Than its external mud of former combined sealing structure; Dust can only advance and can not go out; The situation that mud and dust are constantly piled up in seal ring is much better; Make the mud in the clearance channel; Dust is wanted much less; Therefore can get into dust cover; In the bearing just still less, greatly reduce dust; Mud is to the erosion of seal ring.Prolonged the life-span of sealing configuration, sealed more reliable.

Claims

1. the combined sealing structure of a bearing; Comprise the seal ring (2) that is installed on the bearing outer ring (1) and be installed in the integral body that the dust cover (5) on the bearing inner race (11) is combined into; It is characterized in that described seal ring (2) and the skeleton of being made by spring steel plate (14) are fixed into integral body; Seal ring (2) cooperates with the internal surface of bearing outer ring (1) and the internal surface of dust cover (5) respectively; Form the clearance channel of size variation between said seal ring (2), dust cover (5) and bearing outer ring (1), and clearance channel communicates with the external world.

2. the combined sealing structure of bearing according to claim 1 is characterized in that on the inside and outside periphery of said seal ring (2) top being arranged respectively is pointed sealing lip (12).

3. the combined sealing structure of bearing according to claim 1; It is characterized in that forming between said dust cover external diameter and outer ring (1) bore and import and export sealing (3); Form between internal surface between the head surface of said seal ring (2) and dust cover (5) and under seal ring shank (8) and the dust cover; Following clearance seal (4; 9); Said seal ring shank (8) is terminal to form seal ring inner ring sealing (10) with the dust cover corner; It is b that said seal ring (2) centre has the internal surface centre of a ring groove and dust cover (5) that Extreme breadth is arranged, and expands the spatia (7) that dwindles from top to bottom gradually to.

4. according to the combined sealing structure of claim 1 or 3 described bearings; It is characterized in that described clearance channel by import and export sealing (3), go up clearance seal (4), spatia (7), the passage that connects of clearance seal (9), seal ring inner ring sealing (10) is formed down; And the width of importing and exporting sealing (3), following clearance seal (9) is greater than the width a of clearance seal (4); Import and export sealing and communicate said width b >=4～8a with last clearance seal is vertical.

5. the combined sealing structure of bearing according to claim 1 is characterized in that said dust cover (5) inner radius has chamfering (13), has a turnover inclined-plane (6) on the outer surface.

6. the combined sealing structure of bearing according to claim 1 is characterized in that it is seal ring shank (8) to the protruding arc annulus of dust cover (5) direction that said seal ring (2) has thickness big in exoskeletal support place.