CN213393533U - Combined oil seal structure - Google Patents
Combined oil seal structure Download PDFInfo
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- CN213393533U CN213393533U CN202022390735.3U CN202022390735U CN213393533U CN 213393533 U CN213393533 U CN 213393533U CN 202022390735 U CN202022390735 U CN 202022390735U CN 213393533 U CN213393533 U CN 213393533U
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Abstract
The utility model discloses a combination oil blanket structure relates to oil blanket technical field, and it has mainly set up the second seal lip on the inner edge of combination oil blanket to the redundant seal structure of cooperation first seal lip formation has solved traditional combination oil blanket because of only being equipped with first seal lip, and the dust is after crossing the second seal lip, and whole oil blanket faces the problem of higher inefficacy risk promptly, and then has promoted the life of combination oil blanket.
Description
Technical Field
The utility model relates to an oil blanket technical field particularly, relates to a combination oil blanket structure.
Background
In the existing combined oil seal structure, a first seal lip, a second dust lip and a first dust lip are generally formed in sequence at the inner edge part along the direction from the oil side of an inner cavity to the atmosphere side. Wherein, first seal lip is used for forming by the sealed of inner chamber oil side to atmosphere side, and first dust lip is used for the oil blanket to serve in good service in the early middle period, prevents impurity such as external dust muddy water to flow into the second dust lip, and the second dust lip is used for the oil blanket later stage to serve in good service, prevents impurity such as external dust muddy water to flow into first seal lip. After the combined oil seal is used for a certain time, because the lubricating grease between the first dustproof lip and the second dustproof lip is gradually consumed, the two dustproof lips are abraded due to dry friction with the shaft, and the dustproof performance is reduced; dust easily enters the first sealing lip to cause sealing failure, so that the service life of the whole combined oil seal structure is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a combination oil blanket structure, its life is longer.
The embodiment of the utility model is realized in the way;
the utility model provides a combination oil blanket structure, includes the combination oil blanket body, follow on the inner edge of combination oil blanket body the axial of combination oil blanket body is formed with first seal lip, second dust lip and first dust lip in proper order, the inner edge of combination oil blanket body still is formed with the second seal lip, the second seal lip is located between first seal lip and the second dust lip, the lip orientation of first seal lip and second seal lip is unanimous.
Preferably, the combination oil seal body mainly comprises the outer oil seal body and the inner oil seal body which are sleeved and fixedly connected, the first sealing lip is arranged on the inner oil seal body, and the second sealing lip, the second dust-proof lip and the first dust-proof lip are arranged on the outer oil seal body.
Preferably, the oil seal further comprises a wear-resistant ring fixedly sleeved in the combined oil seal body, the wear-resistant ring is made of polytetrafluoroethylene, and the second sealing lip is formed on the wear-resistant ring.
Preferably, a spiral oil return structure is formed on the rear lip surface of the second sealing lip.
Preferably, an annular storage groove is further concavely formed on the inner edge of the combined oil seal body, the annular storage groove is coaxial with the combined oil seal body, and the annular storage groove is located between the second sealing lip and the second dust lip.
Preferably, the annular reservoir is formed over the waist of the second sealing lip.
Preferably, the outer oil seal body is provided with a bending part and a first spring, the first dust lip is formed on the bending part, and the first spring is nested on the bending part and is positioned on the radial outer side of the first dust lip so as to provide radial compensation force for the first dust lip;
the outer oil seal body also comprises a spring retaining part extending to the radial outer side of the deflection part, and the spring retaining part is fixedly connected with the deflection part or integrally formed with the deflection part;
the distance between the spring retaining part and the first spring in the radial direction of the combined oil seal body is D, and the diameter of the cross section of the first spring is D; wherein D is less than or equal to D/2.
In another preferred embodiment, the outer oil seal body has a flexure and a first spring, the first dust lip is formed on the flexure, and the first spring is nested on the flexure and located radially outside the first dust lip to provide a radial compensation force to the first dust lip;
the outer oil seal body further comprises a wrapping part which is matched with the bending part and wraps the first spring, and the bending part and the wrapping part are integrally formed or fixedly connected.
Preferably, the frameworks in the inner oil seal body supporting part are bent and are butted together.
Since the technical scheme is used, the beneficial effects of the utility model include:
(1) the utility model discloses mainly set up the second seal lip on combination oil blanket's inner edge to the redundant seal structure of cooperation first seal lip formation has solved traditional combination oil blanket because of only being equipped with first seal lip, and the dust is after crossing the second seal lip, and whole oil blanket faces the problem of higher inefficacy risk promptly, and then has promoted combination oil blanket's life.
(2) The utility model discloses still optimized the improvement to the structure of the second seal lip that receives dust erosion easily. Particularly, the utility model discloses in the middle of, the second seal lip is formed at fixed ground cover and establishes on the wear ring among the combination oil blanket body, and wear ring adopts polytetrafluoroethylene to make, because polytetrafluoroethylene material has high temperature resistant, corrosion-resistant, the self-lubricating nature is good and the advantage that coefficient of friction is low, so life, the anti dust performance of second seal lip have all obtained showing and have promoted.
(3) And simultaneously, the utility model discloses still make optimization improvement to the assembly structure that is used for providing the first spring of radial compensation power to first dust lip. The utility model discloses set up parcel portion and fender spring portion respectively in the middle of the dual mode, both all can realize the limiting displacement to first spring.
(4) In the middle of the traditional mode, the skeleton shape in the interior oil blanket body is the L type, and the supporting part rigidity is relatively poor, at the in-process of the oil blanket body and the pressure equipment of outer oil blanket body easy emergence warp, and the utility model discloses in the middle of, the skeleton of oil blanket body supporting part is the pattern of buckling to folding in the above-mentioned, has increased its thickness, and the supporting part rigidity has obtained the promotion.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive efforts.
Fig. 1 is a schematic cross-sectional view of a combined oil seal structure provided in embodiment 1 of the present invention;
FIG. 2 is a drawing showing the cooperation between the inner and outer oil seals in embodiment 1 of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at I;
FIG. 4 is an enlarged partial view at II in FIG. 2;
fig. 5 is a schematic structural view of a wrapping portion in another embodiment provided by the present utility model.
[ description of specific symbols ]:
1-a first seal lip, 2-a second seal lip, 3-a second dust lip, 4-a first dust lip, 5-an outer oil seal body, 51-a bending part, 52-a first spring, 53-a spring blocking part, 54-a wrapping part, 6-an inner oil seal body, 7-a wear-resistant ring, 8-an annular storage groove, 91-a supporting part and 92-a framework.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as a limitation of the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, this embodiment 1 provides a combination oil blanket structure, including the combination oil blanket body, follow on the inner edge of combination oil blanket body the axial of combination oil blanket body is formed with first seal lip 1, second dust lip 3 and first dust lip 4 in proper order, the inner edge of combination oil blanket body still is formed with second seal lip 2, second seal lip 2 is located between first seal lip 1 and the second dust lip 3, the lip orientation of first seal lip 1 and second seal lip 2 is unanimous.
This embodiment 1 has mainly set up second seal lip 2 on the inner edge of combination oil blanket to the redundant seal structure of first seal lip 1 formation of cooperation has been solved traditional combination oil blanket structure because of only being equipped with first seal lip 1, and the dust is after crossing second dust lip 3, and whole oil blanket faces the problem of higher inefficacy risk promptly, and then has promoted the life of combination oil blanket.
As will be appreciated by those skilled in the art: the first seal lip 1, the second seal lip 2, the second dust lip 3, and the first dust lip 4 are distinguished according to the difference in the inner diameter and the difference in the amount of compression of the charged amount. In this embodiment 1, the inner diameters of the first seal lip 1 and the second seal lip 2 are both 93mm, and the inner diameters of the second dust lip 3 and the first dust lip 4 are both 94.8 mm.
Referring to fig. 2, the present embodiment 1 and the conventional combination oil seal have consistency to some extent, that is: the combination oil seal body mainly comprises an outer oil seal body 5 and an inner oil seal body 6 which are sleeved with each other and fixedly connected, wherein the first seal lip 1 is arranged on the inner oil seal body 6, the second seal lip 2, the second dust lip 3 and the first dust lip 4 are arranged on the outer oil seal body 5, the outer oil seal body 5 and the inner oil seal body 6 are specifically fixed by adopting a press fitting process, and an implementer can correspondingly change the setting relation of each oil seal body, the seal lips and the dust lips according to the self requirement.
As described in the background of the invention, the seal lip is susceptible to dust passing over the seal lip, particularly the second seal lip 2, so that it is important to improve the durability of the seal lip. Therefore, referring to fig. 3, as a preferred embodiment, in this embodiment 1, a wear-resistant ring 7 fixedly sleeved in the combined oil seal body is further included, and the second seal lip 2 is formed on the wear-resistant ring 7. The second seal lip 2 is arranged on the wear-resistant ring 7, and compared with the traditional mode in which the seal lip is formed by rubber, the structure has stronger durability and longer service life.
More specifically, in this embodiment 1, the wear-resistant ring 7 is made of polytetrafluoroethylene, and the polytetrafluoroethylene material has the advantages of high temperature resistance, corrosion resistance, good self-lubrication and low friction coefficient, and can effectively improve the service life and the dust resistance of the second seal lip 2. Other materials can be selected by the implementer according to the requirements of the implementer.
In this embodiment 1, the whole wear-resistant ring 7 is fixedly connected to the combined oil seal body made of rubber material through a vulcanization process, and at the same time, a spiral rib for pumping back the lubricating medium, which is spread to the atmosphere side and passes over the second seal lip 2, to between the first seal lip 1 and the second seal lip 2 in cooperation with the shaft is formed on the rear lip surface of the second seal lip 2, and the screw groove may be used by an implementer to replace the above-mentioned spiral rib.
In addition, in this embodiment 1, an annular storage groove 8 is further concavely formed on the inner edge of the combination oil seal body, the annular storage groove 8 is coaxial with the combination oil seal body, and the annular storage groove 8 is located between the second seal lip 2 and the second dust lip 3.
The annular storage groove 8 is mainly used for storing a lubricating medium, and as with a reservoir, when the grease or oil of the second seal lip 2 and the second dust lip 3 is large, the annular storage groove 8 stores the lubricating medium, and when the grease or oil of the second seal lip 2 and the second dust lip 3 is dried up, the stored oil or grease is released again to maintain the lubricating state of the second seal lip 2 and the second dust lip 3.
Further, in the present embodiment 1, the annular storage groove 8 is in the shape of a groove bent in the axial section of the combined oil seal body to enhance its containing effect for the lubricating medium, and the specific position of the annular storage groove 8 is above the waist of the second seal lip 2.
For the combined oil seal provided with the seal lip/the dust lip, the seal lip/the dust lip is generally disposed on the corresponding flexing portion, and the flexing portion is correspondingly nested with the spring for providing the radial compensation force to the seal lip/the dust lip, in this embodiment 1, the first seal lip 1, the second seal lip 2, the first dust lip 4 and the second dust lip 3 are all formed on the corresponding flexing portion, and the first seal lip 1, the second seal lip 2 and the first dust lip 4 are all provided with the corresponding springs for providing the radial compensation force thereto. Wherein, the first spring 52 corresponding to the first dust lip 4 is generally exposed during the use of the oil seal, and has higher falling risk.
Therefore, in order to improve the stability of the first spring 52, referring to fig. 5, in another embodiment, the outer oil seal body 5 further includes a wrapping portion 54 which is matched with the flexing portion 51 and wraps the first spring 52, and the flexing portion 51 and the wrapping portion 54 are integrally formed or fixedly connected to limit the first spring 52 and reduce the risk of falling off.
As a preferred embodiment, please refer to fig. 4, in this embodiment 1, the outer oil seal body 5 further includes a spring stopping portion 53 extending to a radial outer side of the flexible portion 51, and the spring stopping portion 53 is fixedly connected to or integrally formed with the flexible portion 51;
the distance between the spring retaining part 53 and the first spring 52 in the radial direction of the combined oil seal body is D, and the diameter of the cross section of the first spring 52 is D; wherein D is less than or equal to D/2. This design also greatly reduces the risk of the first spring 52 completely disengaging from the outer oil seal body 5, and is less expensive to implement than the wrapping portion 54.
In addition, the shape of the framework 92 of the traditional oil seal is L-shaped, the rigidity of the supporting part 91 is poor, deformation is easy to occur in the press-fitting process of the inner oil seal body 6 and the outer oil seal body 5, and in the embodiment 1, the framework 92 of the supporting part 91 of the inner oil seal body 6 is partially overlapped, so that the thickness of the framework is increased, the rigidity of the supporting part 91 is improved, and the assembly process of the combined oil seal structure can be effectively adapted.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a combination oil blanket structure, includes the combination oil blanket body, follow on the inner edge of combination oil blanket body the axial of combination oil blanket body is formed with first seal lip, second dust lip and first dust lip in proper order, a serial communication port, the inner edge of combination oil blanket body still is formed with the second seal lip, the second seal lip is located between first seal lip and the second dust lip, the lip orientation of first seal lip and second seal lip is unanimous.
2. The combination oil seal structure of claim 1, wherein the combination oil seal body is mainly composed of an outer oil seal body and an inner oil seal body which are sleeved and fixedly connected, the first seal lip is arranged on the inner oil seal body, and the second seal lip, the second dust lip and the first dust lip are arranged on the outer oil seal body.
3. The combination oil seal structure according to claim 1 or 2, further comprising a wear-resistant ring fixedly sleeved in the combination oil seal body, wherein the wear-resistant ring is made of polytetrafluoroethylene, and the second sealing lip is formed on the wear-resistant ring.
4. The combination oil seal structure according to claim 1 or 2, wherein a spiral oil return structure is formed on a rear lip face of the second seal lip.
5. The combination oil seal structure of claim 2, wherein an annular storage groove is further concavely formed on the inner edge of the combination oil seal body, the annular storage groove is coaxial with the combination oil seal body, and the annular storage groove is located between the second seal lip and the second dust lip.
6. A composite oil seal structure as defined in claim 5, wherein said annular reservoir is formed over a waist portion of said second seal lip.
7. The combination oil seal structure according to claim 2, wherein the outer oil seal body has a deflection portion and a first spring, the first dust lip is formed on the deflection portion, and the first spring is nested on the deflection portion and located radially outside the first dust lip to provide a radial compensation force to the first dust lip;
the outer oil seal body further comprises a wrapping part which is matched with the bending part and wraps the first spring, and the bending part and the wrapping part are integrally formed or fixedly connected.
8. The combination oil seal structure according to claim 2, wherein the outer oil seal body has a deflection portion and a first spring, the first dust lip is formed on the deflection portion, and the first spring is nested on the deflection portion and located radially outside the first dust lip to provide a radial compensation force to the first dust lip;
the outer oil seal body also comprises a spring retaining part extending to the radial outer side of the deflection part, and the spring retaining part is fixedly connected with the deflection part or integrally formed with the deflection part;
the distance between the spring retaining part and the first spring in the radial direction of the combined oil seal body is D, and the diameter of the cross section of the first spring is D; wherein D is less than or equal to D/2.
9. The combination oil seal structure of claim 2, wherein the skeletons in the inner oil seal body supporting portion are folded and butted together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390735.3U CN213393533U (en) | 2020-10-23 | 2020-10-23 | Combined oil seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390735.3U CN213393533U (en) | 2020-10-23 | 2020-10-23 | Combined oil seal structure |
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| Publication Number | Publication Date |
|---|---|
| CN213393533U true CN213393533U (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022390735.3U Active CN213393533U (en) | 2020-10-23 | 2020-10-23 | Combined oil seal structure |
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| Country | Link |
|---|---|
| CN (1) | CN213393533U (en) |
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2020
- 2020-10-23 CN CN202022390735.3U patent/CN213393533U/en active Active
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