CN2573757Y

CN2573757Y - Three-lip waterproof sealed bearing

Info

Publication number: CN2573757Y
Application number: CN 02266982
Authority: CN
Inventors: 王长根
Original assignee: SHANGHAI TIANAN BEARING CO Ltd
Current assignee: SHANGHAI TIANAN BEARING CO Ltd
Priority date: 2002-09-09
Filing date: 2002-09-09
Publication date: 2003-09-17
Anticipated expiration: 2012-09-09

Abstract

The utility model relates to a deep groove ball bearing with a water prevention function, particularly a water prevention sealing bearing with three lip edges, which comprises a bearing outer ring (1), a bearing inner ring (2), a ball body (4) and a sealing ring (7), wherein the ball body (4) is arranged in a holding frame. The utility model is characterized in that three convex rings (3) are arranged on the inner periphery side of the sealing ring; the first convex ring is vertical with the external diameter of the bearing inner ring, and other two convex rings are in parallel arrangement and are vertical with the first convex ring; the external diameter surface of the corresponding bearing inner ring forms a step shape; two mutually vertical convex rings are respectively tightly attached to the external diameter surface of the bearing inner ring; the third convex ring approaches to the external diameter surface of the bearing inner ring; the outer periphery side of the sealing ring is tightly connected with the bearing outer ring. The utility model has good water prevention and sealing performance, can prevent grease in the bearing from leaking, and have the characteristics of water prevention, dust prevention and grease leakage prevention.

Description

Three lip frontier defense water-stop bearings

Technical field

The utility model relates to a kind of deep groove ball bearing with water-proof function.

Technical background

The seal arrangement of existing waterproof sealing bearing, the general labyrinth seal structure that adopts, a kind of seal arrangement of deep groove ball bearing is disclosed as Chinese patent 92221530.8, one protruding circle is arranged on the sealing circle inner periphery, one groove is arranged in the seal ring, seal ring inner periphery upper convex ring is close on the external diameter of bearing inner race, and tightly insert in the groove of bearing outer ring the seal ring outer periphery, and promptly seal ring has only a contact lip limit that contacts with inner ring.The bearing that adopts single lip limit seal arrangement is as the used for electric engine of cleaner bearing of doing wet dual-purpose, because vacuum cleaner often contacts with detergent, especially adopt sodium sulfate etc. to be diluted to strong acid-base and make detergent with water, cause the used for electric engine of cleaner bearing perishable, sealability reduces, waterproofing effect is poor, and the bearing internal grease is leaked, and bearing life is 40～50 hour working life only.

Summary of the invention

It is poor that the utility model has overcome single lip limit seal ring waterproofing effect, and the defective that the bearing internal grease is leaked provides a kind of three lip frontier defense water-stop bearings, and this bearing seal performance is good, can waterproof and prevent that the bearing internal grease from leaking.

The utility model is achieved in that a kind of three lip frontier defense water-stop bearings, comprise bearing outer ring, bearing inner race, be loaded on spheroid, seal ring in the retainer, it is characterized in that the seal ring inner periphery side has three protruding circles, first protruding circle and bearing inner race external diameter are perpendicular, other two protruding circles are arranged in parallel and are perpendicular with first protruding circle, corresponding bearing inner race external diameter surface is step-like, orthogonal two protruding circles are close to the bearing inner race external diameter surface respectively, the 3rd protruding circle is near the outer diametric plane of bearing inner race, and seal ring periphery avris and bearing outer ring are fastenedly connected.

In the above-mentioned three lip frontier defense water-stop bearings, described seal ring periphery avris has barb-shaped annulus, and corresponding bearing outer ring inboard has groove, and the barb-shaped annulus of seal ring inserts in the bearing outer ring inboard groove fastening.

Working principle of the present utility model is the contact lip that increases seal ring on the basis of existing single lip limit stuffing box bearing, and the bearing inner race external diameter is made step type, and three contact lockjaw are pasted the bearing inner race external diameter surface bearing is sealed.The periphery avris of seal ring closely is connected with bearing outer ring, and seal ring adopts rubber to make, in metal frame is housed.Three lip frontier defense water-stop bearings have improved bearing waterproof sealing performance, and can prevent the leakage of bearing internal grease, have the advantages that waterproof and dustproof and grease-proof are leaked.

Description of drawings

Fig. 1 is the utility model three lip frontier defense water-stop bearing structure schematic representation.

Among the figure: 1 bearing outer ring, 2 bearing inner races, 3 protruding circles (claiming the contact lip again), 4 Stainless Steel Balls, 5 flukeless retainers, 6 have the pawl retainer, 7 seal rings.

Mode of execution

Referring to Fig. 1, a kind of three lip frontier defense water-stop bearings comprise bearing outer ring 1, bearing inner race 2, are loaded on Stainless Steel Ball 4 and seal ring 7 in the retainer, and retainer is by being made up of pawl retainer 6 and flukeless retainer 5.Seal ring 7 adopts elastic material (as nitrile butadiene rubber) internal lining thin steel plate skeleton to make.Seal ring 7 inner periphery side have three protruding circles (claiming the contact lip again) 3, first protruding circle 3 is perpendicular with bearing inner race 2 external diameters, in addition two protruding circles 3 are arranged in parallel and are perpendicular with first protruding circle 3, corresponding bearing inner race 2 external diameter surfaces are step-like, and promptly bearing inner race 2 external diameter surfaces present the inwardly protruding shape.Orthogonal two protruding circles 3 are close to the inner ring external diameter surface that bearing inner race 2 is convex respectively, like this under the state of rest that bearing does not rotate, the sealing of bearing is formed double seal by two protruding circles 3, has prevented that the water of bearing outside and dust from entering the interior interior grease of bearing that reaches of bearing to external leakage.

Under the dynamical state that bearing rotates, the temperature in the bearing always is higher than ambient temperature, and the rising of temperature makes the bearing internal gas expand in the bearing, thereby produces the outside thrust of seal ring 7, and lubricating grease might outwards be overflowed from bearing inside.In the utility model, owing to adopted the 3rd protruding circle 3 enhanced leaktightness, promptly the 3rd protruding circle 3 is near bearing inner race 2 outer diametric planes, and the expansion of bearing internal gas has promoted the 3rd protruding circle 3 and outwards moved, and be close to bearing inner race 2 external diameters and be the convex face, further strengthened bearing seal.

Seal ring 7 is to adopt to be fastenedly connected with bearing outer ring 1, and seal ring 7 periphery avris have barb-shaped annulus, and corresponding bearing outer ring 1 inboard has groove, and seal ring 7 barb-shaped annulus insert in bearing outer ring 1 inboard groove fastening.

The utility model three lip frontier defense water-stop bearing seal performances are good, characteristics with waterproof and dustproof, anti-leak, be applied to do the used for electric engine of cleaner bearing of wet dual-purpose, its life-span can reach about 150 hours, had reached the rating life index of motor of dust collector design.The utility model is also applicable to dark hook bearing seal.

Claims

1. lip frontier defense water-stop bearing, comprise bearing outer ring (1), bearing inner race (2), be loaded on the spheroid (4) in the retainer, seal ring (7), it is characterized in that seal ring (7) inner periphery side has three protruding circles (3), first protruding circle (3) is perpendicular with bearing inner race (2) external diameter, two protruding circles (3) are arranged in parallel and are perpendicular with first protruding circle (3) in addition, corresponding bearing inner race (2) external diameter surface is step-like, orthogonal two protruding circles (3) are close to bearing inner race (2) external diameter surface respectively, the 3rd protruding circle (3) is near the outer diametric plane of bearing inner race (2), and seal ring (7) periphery avris and bearing outer ring (1) are fastenedly connected.

2. three lip frontier defense water-stop bearings according to claim 1, it is characterized in that seal ring (7) periphery avris has barb-shaped annulus, corresponding bearing outer ring (1) inboard has groove, and the barb-shaped annulus of seal ring (7) inserts in bearing outer ring (1) inboard groove fastening.