CN204942293U - Combined bearing seal ring - Google Patents
Combined bearing seal ring Download PDFInfo
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- CN204942293U CN204942293U CN201520731490.2U CN201520731490U CN204942293U CN 204942293 U CN204942293 U CN 204942293U CN 201520731490 U CN201520731490 U CN 201520731490U CN 204942293 U CN204942293 U CN 204942293U
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- lip
- sealing lip
- fore shaft
- ring
- baffle plate
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Abstract
The utility model relates to a kind of combined bearing seal ring, comprise L shape inner frame, outer back-up ring and elastomer seal, elastomer seal comprises the first sealing lip, second sealing lip and the 3rd sealing lip, first sealing lip, second sealing lip, 3rd sealing lip is separated to form Seal cage a, Seal cage b, Seal cage c, the radial ring portion external diameter end of the back-up ring main body of outer back-up ring is provided with the fore shaft baffle plate axially extended, fore shaft baffle plate stretches in described cavity, elastomer seal also comprises outer dustproof baffle lip, outer dustproof baffle lip is positioned at outside the 3rd sealing lip, the outer circumferential face that outer dustproof baffle lip contacts at fore shaft baffle plate is sealed and matched, described Seal cage c closes by outer dustproof baffle lip and fore shaft baffle plate, outer dustproof baffle lip, the cylindrical part of fore shaft baffle plate and L shape inner frame surrounds fore shaft groove, fore shaft groove connects the impurity entrance of cavity.Under said structure, outer dustproof baffle lip and fore shaft baffle plate coordinate formation fore shaft formula entrance, effectively can store stop, have the advantage of good sealing effect to impurity.
Description
Technical field
The utility model relates to mechanical seal structure technical field, is specifically a kind of combined bearing seal ring.
Background technique
Automobile hub unit work under bad environment, constantly with huge impulsive load, and operate under vibration operating mode, there is violent heat exchange in bearing internal external, a large amount of wheel hubs lost efficacy and came from the dry of lubricating grease and seal failure, and the impurity such as muddy water dust enter the working life that bearing shortens bearing greatly.Space and the cost occupancy volume at the sealing configuration place of automobile hub bearing are very little, but huge on the impact in working life of hub.If sealability is bad, hub bearing can be caused by intrusions such as extraneous silt, dust and steam, and make bearing abnormal noise, increase the weight of the wearing and tearing of raceway and rolling element, generation is peeled off, and sometimes even can cause serious accident.
As shown in Figure 1, the combined labyrinth and carbon gland coil structures that existing hub bearing uses is: include L shape inner frame and the outer back-up ring of L shape, L shape inner frame fastens formation cavity with back-up ring is relative outside L shape, rubber seal is provided with in cavity, rubber seal is attached on L shape inner frame, rubber seal comprises rubber matrix, sealing lip a, sealing lip b and sealing lip c, sealing lip a, sealing lip b and sealing lip c is arranged to inner side successively by outside, cavity is separated into three Seal cages through three sealing lips, three Seal cages comprise two inner enclosed Seal cages, and the outer open Seal cage with impurity entrance, three Seal cages all have certain space and store external muddy water, dust, exogenous impurity can be resisted preferably.
But the combined type packing ring of said structure exists following defect: 1, outer Seal cage is open, its impurity entrance causes impurity etc. more easily to invade, and there is the defect of poor sealing performance.
2, the inclination angle of the oriented lower right in sealing lip c place, the ability resisting exogenous impurity can be strengthened, but in bearing fast turn-around process, Bearing inner temperature raises, and when air pressure is enough large, sealing lip c seals deficiency, via the pressure channel of lip b, lip a, pressure and lubricating grease will instantaneously leak, and cause lack of lubrication, even directly affect bearing life time serious.
Summary of the invention
The present utility model object: for overcoming the defect that prior art exists, the utility model provides a kind of combined bearing seal ring setting up an outer dustproof baffle lip, outer dustproof baffle lip and outer back-up ring form fore shaft formula entry design, formed and effective storage of impurity is stopped to have the advantage of good sealing effect.
For achieving the above object, the utility model provides following technological scheme: a kind of combined bearing seal ring, include L shape inner frame and outer back-up ring, outer back-up ring comprises the back-up ring main body that sectional shape is L shape, L shape inner frame and back-up ring main body are by axially extended cylindrical part and the radial radial ring portion extended, L shape inner frame and back-up ring main body fasten the cavity formed with impurity entrance mutually, L shape inner frame is attached with the elastomer seal that elastic material is made, elastomer seal comprises the first sealing lip be placed in described cavity, second sealing lip and the 3rd sealing lip, first sealing lip, second sealing lip and the 3rd sealing lip are arranged successively by bearing Inside To Outside, described cavity is through the first sealing lip, second sealing lip, 3rd sealing lip is separated into Seal cage a, Seal cage b, Seal cage c, it is characterized in that: the radial ring portion external diameter end of described back-up ring main body is provided with the fore shaft baffle plate axially extended, fore shaft baffle plate stretches in described cavity, described elastomer seal also includes outer dustproof baffle lip, outer dustproof baffle lip is positioned at outside described 3rd sealing lip, the outer circumferential face that outer dustproof baffle lip contacts at fore shaft baffle plate is sealed and matched, described Seal cage c closes by outer dustproof baffle lip and fore shaft baffle plate, outer dustproof baffle lip, the cylindrical part of fore shaft baffle plate and L shape inner frame surrounds fore shaft groove, fore shaft groove connects the impurity entrance of cavity.
By adopting technique scheme, back-up ring main body increases the fore shaft baffle plate stretched in cavity, and coordinate outer dustproof baffle lip, make Seal cage c be closed, before Seal cage c, have fore shaft groove, when having a large amount of muddy water impurity etc. to splash, first enter into inside fore shaft groove, and inside store, combined bearing seal ring before comparing, there is stronger storage capacity, effectively delay impurity and enter into Seal cage c; In addition, when bearing operation, fore shaft groove place at the certain air pressure resistance of formation, can relax the muddy water of splashing, and particularly when there being the muddy water in front to impact, effect is better.
The utility model is set to further: described outer dustproof baffle lip oblique shaft tilts to extend laterally.Under this structural design, the elasticity of outer dustproof baffle lip is better, and more reliable with the conflict of fore shaft baffle plate, sealing effect is better.
The utility model is set to further: the outer circumferential face of described fore shaft baffle plate is high outside and low outside step-like, and the outer circumferential face of corresponding fore shaft baffle plate has stepped slot, and described outer dustproof baffle lip is connected to the knuckle place in stepped slot.Under this structural design, outer dustproof baffle lip is more reliable with coordinating of fore shaft baffle plate, improves sealability, and fore shaft baffle plate is better for the blocking effect of muddy water, and external dustproof baffle lip and fore shaft baffle plate cooperation place are formed to be protected, and avoids direct impact.
The utility model is set to further: the knuckle in described stepped slot is sectional shape is indent circular arc, and the end of described outer dustproof baffle lip is the circular arc with indent circular arc adaptation.Under this structural design, outer dustproof baffle lip coordinates more reliable with fore shaft baffle plate, and when bearing operation, between outer dustproof baffle lip and fore shaft baffle plate, frictional force is little, reduces wear.
The utility model is set to further: the axial outer side wall of described outer back-up ring is provided with the flow guide recesses near described impurity entrance, and the sectional shape of flow guide recesses is V-shaped.Under this structural design, bearing is in operation process, and flow guide recesses can play drainage, to a certain degree can reduce the intrusion of impurity during bearing operation.
The utility model is set to further: described fore shaft baffle plate outer circumferential face is provided with outer, high outside and low outside slope.Under this structural design, slope coordinates drainage trough, can reduce the intrusion of impurity during bearing operation to a certain extent.
The utility model is set to further: the oblique outside diameter of described 3rd sealing lip tilts to extend, the sectional shape of the 3rd sealing lip is elongate, 3rd sealing lip includes the 3rd sealing lip main body, 3rd sealing lip main body is extended with contact lip, the radial ring portion angle of contact lip and outer back-up ring is 0 ~ 25 °, conflicts with the radial ring portion of outer back-up ring and coordinate in the internal diameter side, outer end of contact lip.Under this structural design, conflict with the radial ring portion of outer back-up ring and coordinate in the internal diameter side, outer end of the 3rd sealing lip employing contact lip, area of contact is larger, but contact force is less, can less contact moment, thus reduce wear and heating, also enhance sealing simultaneously and imitate fruit.
The utility model is set to further: described first sealing lip sectional shape is the taper that root is large, top is little, and the axial madial wall of the first sealing lip is be the scarf that acute angle coordinates with the cylindrical part of back-up ring main body, the axial outer side wall of the first sealing lip is the vertical plane at right angles coordinated with the cylindrical part of back-up ring main body.Under this structural design, the axial madial wall scarf design of the first sealing lip can strengthen resists the ability that exogenous impurity invades Bearing inner; The axial outer side wall of the first sealing lip is vertical plane, in bearing fast turn-around process, can keep out the air pressure of the certain inside of bearing, reduces the possibility that lubricating grease leaks, and can increase the space that Seal cage a stores the impurity such as muddy water simultaneously.
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing explanation
Fig. 1 is prior art structural representation;
Fig. 2 is the utility model specific embodiment structural representation.
Embodiment
See accompanying drawing 2, a kind of combined bearing seal ring disclosed in the utility model, include L shape inner frame 1 and outer back-up ring 2, outer back-up ring 2 comprises the back-up ring main body that sectional shape is L shape, L shape inner frame 1 and back-up ring main body are by axially extended cylindrical part 11, the 21 radial ring portions 12 extended with radial direction, 22, L shape inner frame 1 and back-up ring main body fasten the cavity formed with impurity entrance 3 mutually, L shape inner frame 1 is attached with elastomer seal 4(that elastic material makes to be generally rubber material and to make), elastomer seal 4 comprises the first sealing lip 41 be placed in described cavity, second sealing lip 42 and the 3rd sealing lip 43, first sealing lip 41, second sealing lip 42 and the 3rd sealing lip 43 are arranged successively by bearing Inside To Outside, first sealing lip 41, second sealing lip 42 is all conflicted with the cylindrical part 21 of back-up ring main body and is sealed and matched, 3rd sealing lip 43 is conflicted with the radial ring portion 22 of back-up ring main body and is sealed and matched, described cavity is through the first sealing lip 41, second sealing lip 42, 3rd sealing lip 43 is separated into Seal cage a51, Seal cage b52, Seal cage c53, the radial ring portion 22 external diameter end of described back-up ring main body is provided with the fore shaft baffle plate 23 axially extended, fore shaft baffle plate 23 stretches in described cavity, described elastomer seal 4 also includes outer dustproof baffle lip 44, outer dustproof baffle lip 44 is positioned at outside described 3rd sealing lip 43, the outer circumferential face that outer dustproof baffle lip 44 contacts at fore shaft baffle plate 23 is sealed and matched, described Seal cage c53 closes by outer dustproof baffle lip 44 and fore shaft baffle plate 23, outer dustproof baffle lip 44, the cylindrical part 11 of fore shaft baffle plate 23 and L shape inner frame 1 surrounds fore shaft groove 54, fore shaft groove 54 connects the impurity entrance 3 of cavity.Back-up ring main body increases the fore shaft baffle plate stretched in cavity, and coordinate outer dustproof baffle lip, Seal cage c is made to be closed, before Seal cage c, there is fore shaft groove, when having a large amount of muddy water impurity etc. to splash, first enter into inside fore shaft groove, and inside store, combined bearing seal ring before comparing, has stronger storage capacity, effectively delays impurity and enters into Seal cage c; In addition, when bearing operation, fore shaft groove place at the certain air pressure resistance of formation, can relax the muddy water of splashing, and particularly when there being the muddy water in front to impact, effect is better.
For improving the sealing effect of fore shaft groove, described outer dustproof baffle lip 44 oblique shaft tilts to extend laterally.The elasticity of outer like this dustproof baffle lip is better, and more reliable with the conflict of fore shaft baffle plate, sealing effect is better.And the outer circumferential face of described fore shaft baffle plate 23 is high outside and low outside step-like, and the outer circumferential face of corresponding fore shaft baffle plate 23 has stepped slot 231, and described outer dustproof baffle lip 44 is connected to knuckle 2311 place in stepped slot 231.Knuckle 2311 in described stepped slot 231 for sectional shape be indent circular arc, the end of described outer dustproof baffle lip 44 is the circular arc with indent circular arc adaptation.Under stepped slot coordinates, under this structural design, outer dustproof baffle lip is more reliable with coordinating of fore shaft baffle plate, improves sealability, and fore shaft baffle plate is better for the blocking effect of muddy water, and external dustproof baffle lip and fore shaft baffle plate cooperation place are formed to be protected, and avoids direct impact.Circular arc coordinates, and when bearing operation, between outer dustproof baffle lip and fore shaft baffle plate, frictional force is little, reduces wear.
Meanwhile, the axial outer side wall of described outer back-up ring 2 is provided with the flow guide recesses 24 near described impurity entrance 3, and the sectional shape of flow guide recesses 24 is V-shaped.As shown in Figure 1, muddy water flows (its path is B) along flow guide recesses 24, and under this structural design, bearing is in operation process, and flow guide recesses can play drainage, to a certain degree can reduce the intrusion of impurity during bearing operation.And described fore shaft baffle plate 23 outer circumferential face is provided with outer, high outside and low outside slope 232; Slope 232 is the outside step surface of the outer circumferential face step shape of fore shaft baffle plate 23.Under this structural design, slope coordinates drainage trough, can reduce the intrusion of impurity during bearing operation to a certain extent.
Wherein, the axial inner ends of described fore shaft baffle plate 23 is provided with slope shape guide surface 233, and guide surface 233 has outer dustproof baffle lip and fore shaft baffle plate and to conflict leading role when being sealed and matched, and facilitates the outer dustproof baffle lip of inclined design to load in stepped slot.
For improving sealing effect, the oblique outside diameter of described 3rd sealing lip 43 tilts to extend, the sectional shape of the 3rd sealing lip 43 is elongate, 3rd sealing lip 43 includes the 3rd sealing lip main body 431,3rd sealing lip main body 431 is extended with contact lip 432, contact lip 432 is 0 ~ 25 ° with the radial ring portion 22 angle α of outer back-up ring 2, conflicts with the radial ring portion 22 of outer back-up ring 2 and coordinate in the contact internal diameter side, outer end 4321 of lip 432.3rd sealing lip adopts the internal diameter side, outer end of contact lip to conflict with the radial ring portion of outer back-up ring and coordinate, and comparatively greatly, but contact force is less for area of contact, can less contact moment, thus reduce wear and heating, also enhances sealing simultaneously and has imitated really.
In this specific embodiment, described first sealing lip 41 sectional shape is the taper that root is large, top is little, and the axial madial wall 411 of the first sealing lip 41 is the scarf coordinated in acute angle with the cylindrical part 21 of back-up ring main body, the axial outer side wall 412 of the first sealing lip 41 is the vertical plane at right angles coordinated with the cylindrical part 21 of back-up ring main body.Under this structural design, the axial madial wall scarf design of the first sealing lip can strengthen resists the ability that exogenous impurity invades Bearing inner; The axial outer side wall of the first sealing lip is vertical plane, in bearing fast turn-around process, can keep out the air pressure of the certain inside of bearing, reduces the possibility that lubricating grease leaks, and can increase the space that Seal cage a stores the impurity such as muddy water simultaneously.
Claims (8)
1. a combined bearing seal ring, include L shape inner frame and outer back-up ring, outer back-up ring comprises the back-up ring main body that sectional shape is L shape, L shape inner frame and back-up ring main body are by axially extended cylindrical part and the radial radial ring portion extended, L shape inner frame and back-up ring main body fasten the cavity formed with impurity entrance mutually, L shape inner frame is attached with the elastomer seal that elastic material is made, elastomer seal comprises the first sealing lip be placed in described cavity, second sealing lip and the 3rd sealing lip, first sealing lip, second sealing lip and the 3rd sealing lip are arranged successively by bearing Inside To Outside, described cavity is through the first sealing lip, second sealing lip, 3rd sealing lip is separated into Seal cage a, Seal cage b, Seal cage c, it is characterized in that: the radial ring portion external diameter end of described back-up ring main body is provided with the fore shaft baffle plate axially extended, fore shaft baffle plate stretches in described cavity, described elastomer seal also includes outer dustproof baffle lip, outer dustproof baffle lip is positioned at outside described 3rd sealing lip, the outer circumferential face that outer dustproof baffle lip contacts at fore shaft baffle plate is sealed and matched, described Seal cage c closes by outer dustproof baffle lip and fore shaft baffle plate, outer dustproof baffle lip, the cylindrical part of fore shaft baffle plate and L shape inner frame surrounds fore shaft groove, fore shaft groove connects the impurity entrance of cavity.
2. combined bearing seal ring according to claim 1, is characterized in that: described outer dustproof baffle lip oblique shaft tilts to extend laterally.
3. combined bearing seal ring according to claim 2, is characterized in that: the outer circumferential face of described fore shaft baffle plate is high outside and low outside step-like, and the outer circumferential face of corresponding fore shaft baffle plate has stepped slot, and described outer dustproof baffle lip is connected to the knuckle place in stepped slot.
4. combined bearing seal ring according to claim 3, it is characterized in that: the knuckle in described stepped slot is sectional shape is indent circular arc, the end of described outer dustproof baffle lip is the circular arc with indent circular arc adaptation.
5. combined bearing seal ring according to claim 1 or 2 or 3 or 4, is characterized in that: the axial outer side wall of described outer back-up ring is provided with the flow guide recesses near described impurity entrance, and the sectional shape of flow guide recesses is V-shaped.
6. combined bearing seal ring according to claim 5, is characterized in that: described fore shaft baffle plate outer circumferential face is provided with outer, high outside and low outside slope.
7. combined bearing seal ring according to claim 1 or 2 or 3 or 4, it is characterized in that: the oblique outside diameter of described 3rd sealing lip tilts to extend, the sectional shape of the 3rd sealing lip is elongate, 3rd sealing lip includes the 3rd sealing lip main body, 3rd sealing lip main body is extended with contact lip, the radial ring portion angle of contact lip and outer back-up ring is 0 ~ 25 °, conflicts with the radial ring portion of outer back-up ring and coordinate in the internal diameter side, outer end of contact lip.
8. combined bearing seal ring according to claim 1 or 2 or 3 or 4, it is characterized in that: described first sealing lip sectional shape is the taper that root is large, top is little, and the axial madial wall of the first sealing lip is be the scarf that acute angle coordinates with the cylindrical part of back-up ring main body, the axial outer side wall of the first sealing lip is the vertical plane at right angles coordinated with the cylindrical part of back-up ring main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731490.2U CN204942293U (en) | 2015-09-21 | 2015-09-21 | Combined bearing seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731490.2U CN204942293U (en) | 2015-09-21 | 2015-09-21 | Combined bearing seal ring |
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| Publication Number | Publication Date |
|---|---|
| CN204942293U true CN204942293U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520731490.2U Active CN204942293U (en) | 2015-09-21 | 2015-09-21 | Combined bearing seal ring |
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| Country | Link |
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| CN (1) | CN204942293U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371626A (en) * | 2018-10-31 | 2019-02-22 | 无锡小天鹅股份有限公司 | Roller washing machine |
| CN110153975A (en) * | 2019-05-28 | 2019-08-23 | 无锡上机数控股份有限公司 | Safeguard structure for mobile work platform |
| CN110153975B (en) * | 2019-05-28 | 2024-06-04 | 弘元绿色能源股份有限公司 | Protective structure for movable workbench |
-
2015
- 2015-09-21 CN CN201520731490.2U patent/CN204942293U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371626A (en) * | 2018-10-31 | 2019-02-22 | 无锡小天鹅股份有限公司 | Roller washing machine |
| CN110153975A (en) * | 2019-05-28 | 2019-08-23 | 无锡上机数控股份有限公司 | Safeguard structure for mobile work platform |
| CN110153975B (en) * | 2019-05-28 | 2024-06-04 | 弘元绿色能源股份有限公司 | Protective structure for movable workbench |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |