CN201891757U - Oil seal for universal joint - Google Patents
Oil seal for universal joint Download PDFInfo
- Publication number
- CN201891757U CN201891757U CN2010201590234U CN201020159023U CN201891757U CN 201891757 U CN201891757 U CN 201891757U CN 2010201590234 U CN2010201590234 U CN 2010201590234U CN 201020159023 U CN201020159023 U CN 201020159023U CN 201891757 U CN201891757 U CN 201891757U
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- Prior art keywords
- lip
- sealing
- seal
- head
- oil
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- Expired - Fee Related
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Abstract
The utility model relates to an oil seal for an universal joint, which comprises an annular metal framework and a seal body glued on the metal framework, wherein the section of the annular metal framework is L-shaped, the seal body glued on the metal framework is provided with three seal lips; an internal seal lip and a middle seal lip are formed on the same substrate; the distance between the middle seal lip and an external seal lip is long; the roots of the middle seal lip and the external seal lip are connected with each other through an elastic body with the thickness of 0.15-0.3 mm; the internal seal lip is attached to the bottom of the metal framework, the middle seal lip is positioned at the middle part of the seal body, and the head part of the metal framework is inserted into the middle part of the external seal lip; the external seal lip forms a head lip and a tail lip; and the head lip is arranged at the inner side of the metal framework and the tail lip is protruded at the outer side of the metal framework. The oil seal for the universal joint solves the defects that the frictional resistance of the oil seal of a universal joint is great, the oil seal is easy to abrade, and the grease is easy to extrude from the oil seal when the temperature and air pressure are increased.
Description
Technical field
The utility model relates to a kind of oil sealing, relates in particular to the oil sealing that is exclusively used in Hooke's joint.
Background technique
Universal joint in order to guarantee good lubricating status, all is provided with oil sealing in using, employed oil sealing in the existing universal joint is only established a slice sealing lip, mostly though it is simple in structure, easily manufactured, but this oil sealing poor flexibility exists and rubs between oil sealing and cross-axis head greatly, easy to wear, and do not store the groove of lubricant grease, dry friction, fricative excessive intensification take place between sealing lip and the cross axle easily, it is aging to have aggravated oil sealing, thereby causes the sealability of oil sealing not good enough.
The utility model patent of notification number CN2442028 Y discloses a kind of oil sealing, the inboard in its cross section is provided with intrados, the supporting surface in its outside is fixed on the oil tight skeleton, and between intrados and supporting surface, be provided with the neck of contraction, make the inner edge of oil sealing cambered surface constitute interior sealing lip, its outer rim constitutes outer seal lip.The structure of outer seal lip plays seal action for the second time, has increased the surface of contact with member, improve sealability, but still it is big to exist surface friction drag, and is easy to wear, in temperature, grease such as easily extruded at drawback when air pressure raise from oil sealing.The model utility of notification number CN2382891 Y discloses a kind of oil sealing of Hooke's joint.It mainly is the structure that oil sealing is designed to many lips, and it is inside and outside to seal respectively middle shoulder and little shoulder interference fit with cross-axis head; And outer axle bowl outer end and the big shoulder interference fit of spindle nose of oil sealing, inner and oil sealing Spielpassung.Though this class oil seal structure, sealing is better, and it is little to wear and tear, and has improved the sealability of bearing, this type of oil seal structure more complicated, and processing difficulties, gummed neither be sacrifices consisting of an ox, a sheep and a pig solid between seal on the oil sealing and skeleton.
Summary of the invention
Goal of the invention of the present utility model provides a kind of many lips and can form multi-sealed, sealing lip good springiness, the Hooke's joint oil sealing that wearing and tearing are slow, the life-span is long, it can be applicable to vibration is axially arranged between cross-axis head and bearing support, axial clearance has slight variation, Duo Shui, many dusts, heavy wool dirt etc. are than rugged environment, and can solve grease in temperature, the problem extruded from oil sealing when air pressure raises.
To achieve these goals, the utility model is by the following technical solutions: a kind of oil sealing of universal joint, comprise annular metal skeleton and the seal that is glued on the metal frame: annular metal skeleton cross section is the L type, seal of gummed is provided with three sealing lips on it, interior sealing lip and middle sealing lip grow from same matrix, middle sealing lip and outer seal lip distance are far away, their roots are the elastomer connection of 0.15 ~ 0.3mm by thickness, interior sealing lip is near the metal frame bottom, middle sealing lip is positioned at the seal middle part, the head of metal frame inserts the outer seal lip middle part, outer seal lip forms head lip and two lips of afterbody lip, the head lip is in the metal frame inboard, and the afterbody lip is given prominence in the metal frame outside.The cross section is that the annular metal skeleton of L type has not only increased the interference fit length between oil sealing and the bearing support, make oil sealing be enhanced with the fastness that is connected between the bearing support, make that also the cemented surface between metal frame and the seal is wideer, make that gummed is more firm between metal frame and the seal, and make oil sealing easy for installation, the coaxality height, thermal diffusivity is good.Interior sealing lip, middle sealing lip and outer seal lip head lip, lip length different with cross-axis head on different shoulder match.The head of metal frame inserts the outer seal lip middle part, and the angle that forms between outer seal lip and the shaft axis is 15 ~ 30 degree, and the lip circle of outer seal lip afterbody is attached to the dust-proof cover inner side surface.Because the head of metal frame inserts the middle part of outer seal lip, the average thickness of joint is 0.15 ~ 0.3mm between outer seal lip and the middle sealing lip, stressed easy elongation, outer seal lip in being subjected to, press do the time spent can be towards the cross axle side shifting, and be rotating center with self middle part, do low-angle rotation, can guarantee that outer seal lip is in different operating modes, press under the situation about increasing in the bearing, remain good sealing.Outer seal lip afterbody lip is attached to the inner side surface of the dust-proof cover that the oil sealing outside is set, play a part one sealing again, form a Seal cage between outer seal lip head lip and outer seal lip afterbody lip, make steam, greasy dirt, the dust in the bearing outside be isolated in the bearing outside, can not enter into the bearing the inside and come.
Groove on the oil sealing in the seal has not only been saved the material of making oil sealing, also increased simultaneously the elasticity of sealing lip on the seal, groove inboard on the seal is bigger than the groove in the outside, deposit the grease of different amounts in the groove, grease can be provided, allow sealing lip and cross axle contact position form lubricant film, reduce the sealing lip wearing and tearing, improve the durability of oil sealing.Interior sealing lip, middle sealing lip, their lip is 40 ~ 50 degree towards the consistent angle that forms with shaft axis, make sealing lip axially and radially all have better elastic, improved the followability of sealing lip and cross-axis head, have when slightly beating even cross-axis head is in service, guaranteed that also sealing lip is constant substantially to the power of holding tightly of cross-axis head, improved sealing effect, not only solve motive sealing problem under the dynamic situation, also solved the static seal problem under the static situation simultaneously.Simultaneously along with bearing temperature in actual motion raises, air pressure rising in various degree in bearing inboard and two grooves, increase in various degree takes place in the magnitude of interference of sealing lip and middle sealing lip and cross-axis head in making, the also corresponding thereupon increase of power in acting on sealing lip and the middle sealing lip, make the sealability of oil sealing can not be subjected to obvious influence, within the specific limits, Sealing Performance of Oil Seal is become better and better on the contrary.
The thickness of the sealing lip on the seal is 0.8 ~ 1.5mm, because rubbery sealed body has very strong plasticity and sufficient elasticity distortion, the sealing lip of this thickness and the interference fit of cross-axis head are suitable, so can form the suitable oil film of a thickness between sealing lip on the seal and the cross-axis head, avoid oil slick thickness excessive, grease is sewed, while can not take place because of oil slick thickness too small yet, causes dry friction, causes excessive heating, thereby obviously reduced the oil sealing wearing and tearing, improved the oil sealing life-span.
The oil sealing of this new structure, gummed is very firm between seal on the oil sealing and L shaped metal frame easy to make, groove in the oil sealing, can save the material of making oil sealing, especially can improve the elasticity of sealing lip on the seal, make the interference fit between sealing lip and cross-axis head suitable, outer seal lip can move and rotate by a small margin, realized that outer seal lip head lip keeps suitable magnitude of interference with cross-axis head all the time, can avoid in the past oil sealing because of bearing temperature in actual motion, air pressure raises, sealability variation and drawback that grease is extruded from bearing, and obviously reduced the wearing and tearing of sealing lip, the working life of having improved whole oil sealing.
Description of drawings
The structural representation of oil sealing in accompanying drawing 1 the utility model;
Structural representation under accompanying drawing 2 the utility model oil sealing behaviours in service.
Embodiment
Below in conjunction with accompanying drawing the utility model structure and technological scheme are described in further detail.Referring to the universal joint oil sealing shown in the accompanying drawing 1, annular metal skeleton 24 cross sections are the L type, the seal of gummed is provided with three sealing lips on the metal frame 24, interior sealing lip 21 near the metal frames bottom, be arranged in the seal middle part sealing lip 22, give prominence to outer seal lip 23 in metal frame 24 outsides, the head of metal frame 24 inserts outer seal lip 23 middle parts, and outer seal lip forms head seal lip 23a and tail seal lip 23b.On the seal interior, in, the average thickness of outer three sealing lips is 1mm, connecting elastomer thickness between middle sealing lip and the outer seal lip is 0.2mm, interior sealing lip 21, middle sealing lip 22 lip directions and shaft axis form miter angle, and outer seal lip 23 lip directions and shaft axis form 20 degree angles.Inboard groove 25 is bigger on the seal, and outside groove 26 is less, deposits the grease of different amounts in the groove.
Cross-axis head referring to sealing lip 21, middle sealing lip 22 and outer seal lip head seal lip 23a and assembling in accompanying drawing 1 and the accompanying drawing 2 fits, and has formed triple seal; Outer seal lip tail seal lip 23b fits with the dust-proof cover that is arranged on the oil sealing outside, plays a part one sealing again.During the universal joint actual motion, press in the bearing under the situation about increasing, interior sealing lip 21, middle sealing lip 22 can increase to some extent with the magnitude of interference of cross-axis head, have guaranteed good seal.Elastomer between middle sealing lip 22 and the outer seal lip 23, applied elongation, make the external sealed lip towards the cross-axis head side shifting, and in the middle part of self to be the rotating center rotation, make the magnitude of interference between outer seal lip head lip 23a and the cross-axis head to adapt, guaranteed sealability with the degree that interior pressure increases.Outer seal lip afterbody lip 23b is attached to the dust-proof cover inner side surface, because outer seal lip afterbody lip becomes 20 degree angles with shaft axis, fitting between outer seal lip afterbody lip and dust-proof cover inner side surface can adapt under the less situation of wearing and tearing, keeps good sealing.
When oil sealing is made,, and then, inject rubbery sealed body, under certain temperature condition, rubbery sealed body is glued on the skeleton, obtain the oil sealing of integral type with special-purpose mould by the metal frame that designs.But the oil sealing material is specialized designs also, and seal adopts the fluorine rubber of novel fire resistant, and metal frame adopts carbon constructional quality steel 08F and does special thermal treatment and antirust processing.
Claims (5)
1. the oil sealing of a universal joint, comprise annular metal skeleton and the seal that is glued on the metal frame: described annular metal skeleton (24) cross section is the L type, seal of gummed is provided with three sealing lips on it, interior sealing lip (21) and middle sealing lip (22) grow from same matrix, middle sealing lip (22) is far away with outer seal lip (23) distance, their roots are the elastomer connection of 0.15 ~ 0.3mm by thickness, interior sealing lip (21) is near the metal frame bottom, middle sealing lip (22) is positioned at the seal middle part, the head of metal frame (24) inserts outer seal lip (23) middle part, outer seal lip forms head lip (23a) and two lips of afterbody lip (23b), head lip (23a) is in the metal frame inboard, and afterbody lip (23b) is given prominence in the metal frame outside.
2. according to the oil sealing of the described a kind of universal joint of claim 1, it is characterized in that: described outer seal lip (23) is 15 ~ 30 degree with the angle that shaft axis forms, head lip (23a) is fitted on the cross-axis head of assembling, and afterbody lip (23b) is attached to the dust-proof cover inner side surface that is arranged on the oil sealing outside.
3. according to the oil sealing of the described a kind of universal joint of claim 1, it is characterized in that: sealing lip (21), middle sealing lip (22) in described, their lip is towards unanimity, the angle that forms with shaft axis is 40 ~ 50 degree, the lip of interior sealing lip (21) is grown up long in the lip of middle sealing lip (22), and interior sealing lip (21) and middle sealing lip (22) form double seal with the cross-axis head of assembling.
4. according to the oil sealing of the described a kind of universal joint of claim 1, it is characterized in that: in described, in, form two U font grooves between outer three sealing lips, inboard groove (25) is bigger than the groove (26) in the outside.
5. according to the oil sealing of the described a kind of universal joint of claim 1 ~ 4, it is characterized in that: the thickness of sealing lip, middle sealing lip and outer seal lip is 0.8 ~ 1.5mm in described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201590234U CN201891757U (en) | 2010-04-15 | 2010-04-15 | Oil seal for universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201590234U CN201891757U (en) | 2010-04-15 | 2010-04-15 | Oil seal for universal joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201891757U true CN201891757U (en) | 2011-07-06 |
Family
ID=44221234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201590234U Expired - Fee Related CN201891757U (en) | 2010-04-15 | 2010-04-15 | Oil seal for universal joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201891757U (en) |
-
2010
- 2010-04-15 CN CN2010201590234U patent/CN201891757U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20190415 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |