CN214331479U - Oil seal with dual dustproof lips - Google Patents

Abstract

The utility model relates to a field of oil blanket specifically is an oil blanket with dual dustproof lip, and it includes the oil blanket body and sets up at this internal metal support frame of oil blanket, integrated into one piece has seal lip and first dustproof lip on the oil blanket body, seal lip outside cover is equipped with from the tight spring, oil blanket body still integrated into one piece has the second dustproof lip, the inner circle of first dustproof lip and second dustproof lip all is provided with keeps off the ring, keep off the ring and extend to the axis direction that is close to the oil blanket body. First dustproof lip and second dustproof lip in this application can play dual dirt-proof effect, with impurity interception such as dust outside sealing device, can guarantee the sealing performance of oil blanket. And the baffle ring arranged on the inner rings of the first dust lip and the second dust lip can be attached to the rotating shaft, so that a better sealing effect is achieved, the gap between the oil seal and the rotating shaft is reduced, and the entering of foreign matters such as dust is reduced.

Description

Oil seal with dual dustproof lips

Technical Field

The application relates to the field of oil seals, in particular to an oil seal with dual dust lips.

Background

The oil seal is a sealing device, and the oil seal generally serves to isolate parts needing lubrication in the transmission parts from the external environment, so that the lubricating oil cannot leak. The oil seals can be divided into rotary oil seals and reciprocating oil seals according to working conditions. The crankshaft is used for gasoline engines, diesel engines, gearboxes, differentials, shock absorbers, engines, axles and the like.

The oil seal mainly comprises an oil seal body, a reinforcing framework and a self-tightening spiral spring. The sealing body is divided into a bottom part, a waist part, a cutting edge, a sealing lip and the like according to different parts. Generally, the framework oil seal in a free state has an inner diameter smaller than the shaft diameter, namely, has a certain interference. The traditional oil seal only has one dust lip.

In view of the above-mentioned related art, the inventors thought that there is a defect that foreign matter enters after a long time of use, when the oil seal of the single dust lip is applied to the rotating shaft, the compressive force acting in the axial direction of the tip portion of the dust lip weakens with the rotation of the rotating shaft, and a phenomenon that the polymer material hardens while rotating friction causes not only deterioration of the sealing performance but also increase of noise at the time of operation.

SUMMERY OF THE UTILITY MODEL

In order to guarantee the sealing performance of oil blanket, reduce the foreign matter and get into, this application provides an oil blanket with dual dustproof lip.

The application provides a pair of oil blanket with dual dustproof lip adopts following technical scheme:

the utility model provides an oil blanket with dual dustproof lip, includes the oil blanket body and sets up this internal metal support frame of oil blanket, integrated into one piece has seal lip and first dustproof lip on the oil blanket body, seal lip outside cover is equipped with from the tight spring, the oil blanket body still integrated into one piece has the second dustproof lip, the inner circle of first dustproof lip and second dustproof lip all is provided with keeps off the ring, keep off the ring and extend to the axis direction that is close to the oil blanket body.

Through adopting above-mentioned technical scheme, first dustproof lip and second dustproof lip can play dual dirt-proof effect, under the long-time circumstances of using of oil blanket, even get into in the gap of first dustproof lip and rotation axis, also can enter into the gap between first dustproof lip and the second dustproof lip even the dust, consequently can guarantee the sealing performance of oil blanket. And the baffle ring arranged on the inner rings of the first dust lip and the second dust lip can be attached to the rotating shaft, so that a better sealing effect is achieved, the gap between the oil seal and the rotating shaft is reduced, and the entering of foreign matters such as dust is reduced.

Optionally, the baffle ring is provided with two sets, and the baffle ring is arranged at the corners of the first dust lip and the second dust lip.

Through adopting above-mentioned technical scheme, the fender ring that sets up in the corner can play better effect of blockking to foreign matter such as dust in the edge of first dustproof lip and second dustproof lip, guarantees the sealing performance of oil blanket.

Optionally, the inner rings of the sealing lip, the first dust lip and the second dust lip are all provided with wear-resistant layers.

Through adopting above-mentioned technical scheme, the setting of wearing layer can strengthen the wear resistance of seal lip, first dustproof lip and second dustproof lip, can slow down the sclerosis of seal lip, first dustproof lip and second dustproof lip when the rotation axis rotates production friction, guarantees the leakproofness of oil blanket.

Optionally, a plurality of oil return grooves are formed in the inner rings of the sealing lip, the first dust lip and the second dust lip.

Through adopting above-mentioned technical scheme, lubricating oil can be held in setting up of oil gallery, can increase the lubricity between oil blanket and the rotation axis, reduces coefficient of friction to can slow down the sclerosis of oil blanket, guarantee its sealing performance.

Optionally, the notch of the oil return groove is integrally formed with a rim.

Through adopting above-mentioned technical scheme, the setting along the limit can make the oil gallery have more accommodation space, consequently can increase the oil storage capacity of lubricating oil, reduces the coefficient of friction between oil blanket and the rotation axis.

Optionally, an annular cavity is formed in the sealing lip, and the position of the self-tightening spring corresponds to the annular cavity.

Through adopting above-mentioned technical scheme, produce certain pressure from the tight spring, this pressure acts on the cavity in the first dust lip, and cavity deformation, the effect produces great deformation in first dust lip inner circle under the cavity pressure, can change the elastic deformation direction of first dust lip, makes the joint inseparabler, guarantees the leakproofness of oil blanket.

Optionally, the wall thickness of the annular cavity on the side close to the inner ring of the dust lip is larger than the wall thickness on the side close to the self-tightening spring.

Through adopting above-mentioned technical scheme, the thick one side intensity of annular cavity wall thickness is bigger, and rotation axis and the great one side direct contact of wall thickness consequently can slow down the hardening speed of oil blanket, guarantee the connection tightness between oil blanket and the rotation axis.

Optionally, the outer side of the oil seal body is integrally formed with an extension convex ring, and the outer diameter of the extension convex ring is larger than that of the oil seal body.

Through adopting above-mentioned technical scheme, when the installation oil blanket, extend the bulge loop and can be in the same place with the inseparable joint of installing component, prevent that the oil blanket from taking place not hard up the condition to this guarantees sealing performance.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the first dustproof lip, the second dustproof lip and the baffle ring can enable the oil seal to be tightly attached to the rotating shaft, so that a better sealing effect is achieved, a gap between the oil seal and the rotating shaft is reduced, and the entering of foreign matters such as dust is reduced;

2. the arrangement of the wear-resistant layer can enhance the wear resistance of the seal lip, the first dust lip and the second dust lip, and can slow down the hardening of the seal lip, the first dust lip and the second dust lip when the rotation shaft rotates to generate friction, so that the sealing performance of the oil seal is ensured;

3. the cavity in the first dust lip can produce deformation under the pressure effect that receives the self-tightening spring, and the first dust lip inner circle produces great deformation under the effect of cavity internal pressure, can change the elastic deformation direction of first dust lip, makes the joint inseparabler, guarantees the leakproofness of oil blanket.

Drawings

Fig. 1 is a schematic sectional structure of an oil seal.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is an enlarged schematic view of the structure of part B in fig. 1.

Description of reference numerals: 1. an oil seal body; 2. a metal support frame; 3. a sealing lip; 4. a first dust lip; 5. a second dust lip; 6. an extension convex ring; 7. a self-tightening spring; 8. an annular cavity; 9. a baffle ring; 10. an oil return groove; 11. and (5) edge-following.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses oil blanket with dual dust lip. Referring to fig. 1, the oil seal with double dust lips comprises an oil seal body 1 and a metal support frame 2 arranged in the oil seal body 1, wherein a sealing lip 3, a first dust lip 4 and a second dust lip 5 are integrally formed on the oil seal body 1, and the length of the first dust lip 4 is greater than that of the second dust lip 5.

The inner circle of seal lip 3, first dustproof lip 4 and second dustproof lip 5 all is provided with the wearing layer, and the wearing layer sets up to the polytetrafluoroethylene layer, and the polytetrafluoroethylene layer can form the one deck wearing layer at the oil blanket inlayer, plays the effect of protection to the oil blanket, plays the guard action to the oil blanket when the rotation axis rotates the production wearing and tearing, slows down the sclerosis of oil blanket, guarantees the leakproofness of oil blanket.

Referring to fig. 1, when the installation oil blanket, with oil blanket and equipment casing joint, the outside integrated into one piece of oil blanket body 1 has extension bulge loop 6, the external diameter that extends bulge loop 6 is greater than the external diameter of oil blanket body 1, it is corresponding, can set up in the mounting groove of equipment casing and extend 6 looks joint complex annular grooves of bulge loop, the internal diameter of annular groove is greater than the external diameter of oil blanket and is less than the external diameter that extends bulge loop 6, make and extend bulge loop 6 and can get inseparabler with equipment casing joint.

Referring to fig. 1, 3 outside covers of seal lip are equipped with from tight spring 7, annular cavity 8 has been seted up in the seal lip 3, annular cavity 8 is corresponding with the position of self-tight spring 7, self-tight spring 7 acts on seal lip 3, annular cavity 8 in the seal lip 3 can produce deformation when receiving pressure, the deformation scope that annular cavity 8 produced is great, it is bigger to compare in the packing force scope that self-tight spring 7 produced alone, it is the elastic deformation direction of seal lip 3 to combine together the change from tight spring 7 and annular cavity 8, consequently, the chucking sealing effect is better.

Referring to fig. 1, the wall thickness of the annular cavity 8 close to the inner ring side of the dust lip is larger than that close to the self-tightening spring 7, and after the oil seal is installed, the wall thickness of the annular cavity 8 close to the rotating shaft side is thicker, so that when the rotating shaft rotates to generate abrasion, the sealing lip 3 is more wear-resistant, and the sealing performance of the oil seal is ensured.

Referring to fig. 2, the inner rings of the first dust lip 4 and the second dust lip 5 are both provided with a baffle ring 9, the baffle ring 9 is integrally formed with the first dust lip 4 and the second dust lip 5, and the baffle ring 9 extends towards the axial direction close to the oil seal body 1. Keep off ring 9 and be provided with two sets ofly, two sets of fender rings 9 all set up in the corner of first dustproof lip 4 and second dustproof lip 5, keep off ring 9's setting and can further make first dustproof lip 4 and second dustproof lip 5 inseparabler with being connected of rotation axis, reduce the entering of foreign matter such as dust.

Referring to fig. 3, a plurality of oil return grooves 10 have been seted up to seal lip 3's inner circle, and the notch department integrated into one piece of oil return groove 10 has edgewise 11, and edgewise 11 forms great oil storage space with oil return groove 10 jointly, can make the interior storage of oil blanket put more lubricating oil, plays the guard action to the oil blanket inner wall, guarantees sealing performance simultaneously.

The implementation principle of this application embodiment oil blanket with dual dust lip is: when the installation oil blanket, with oil blanket and equipment housing looks joint, the outside integrated into one piece of oil blanket body 1 has extension bulge loop 6, makes extension bulge loop 6 can be inseparabler with equipment housing joint. First dust lip 4 and second dust lip 5 and seal lip 3 can laminate mutually with the axis of rotation, can hold lubricating oil in the oil gallery 10 simultaneously, can guarantee the leakproofness when the axis of rotation pivoted.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides an oil blanket with dual dustproof lip, includes oil blanket body (1) and sets up metal support frame (2) in oil blanket body (1), integrated into one piece has seal lip (3) and first dustproof lip (4) on oil blanket body (1), seal lip (3) outside cover is equipped with from tight spring (7), its characterized in that: the oil seal body (1) is further integrally formed with a second dust lip (5), inner rings of the first dust lip (4) and the second dust lip (5) are provided with a baffle ring (9), and the baffle ring (9) extends towards the axis direction close to the oil seal body (1).

2. The oil seal with the double dust lips as claimed in claim 1, wherein: keep off ring (9) and be provided with two sets ofly, two sets of keep off ring (9) all set up the corner in first dustproof lip (4) and second dustproof lip (5).

3. The oil seal with the double dust lips as claimed in claim 1, wherein: the inner rings of the sealing lip (3), the first dust-proof lip (4) and the second dust-proof lip (5) are all provided with wear-resistant layers.

4. The oil seal with the double dust lips as claimed in claim 1, wherein: a plurality of oil return grooves (10) are formed in the inner rings of the sealing lip (3), the first dust-proof lip (4) and the second dust-proof lip (5).

5. The oil seal with the double dust lips as claimed in claim 4, wherein: the notch of the oil return groove (10) is integrally formed with a rim (11).

6. The oil seal with the double dust lips as claimed in claim 1, wherein: an annular cavity (8) is formed in the sealing lip (3), and the position of the self-tightening spring (7) corresponds to the annular cavity (8).

7. The oil seal with the double dust lips as claimed in claim 6, wherein: the wall thickness of the annular cavity (8) close to one side of the inner ring of the dust lip is larger than that of the annular cavity close to one side of the self-tightening spring (7).

8. The oil seal with the double dust lips as claimed in claim 1, wherein: the outer side of the oil seal body (1) is integrally formed with an extension convex ring (6), and the outer diameter of the extension convex ring (6) is larger than that of the oil seal body (1).

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