CN214789020U - Sealing device - Google Patents
Sealing device Download PDFInfo
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- CN214789020U CN214789020U CN202120021486.2U CN202120021486U CN214789020U CN 214789020 U CN214789020 U CN 214789020U CN 202120021486 U CN202120021486 U CN 202120021486U CN 214789020 U CN214789020 U CN 214789020U
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- sealing
- head cover
- cylinder head
- lip
- sealing device
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Abstract
The utility model relates to an engine oil blanket technical field discloses a sealing device. The sealing device comprises a lining and a cylinder head cover for sealing the ignition coil, wherein the cylinder head cover is provided with a mounting hole, and the lining is arranged in the mounting hole of the cylinder head cover in a penetrating way; this sealing device specifically includes the basal portion, flexion, the lip of locating the bush outside the cover, wherein: the base part is used for being connected with the surface of the cylinder head cover in a sealing mode; the lip is used for sealing connection with the surface of the bushing; the bending part connects the base part and the lip part, and the length of the body of the bending part is larger than the axial length of the bending part along the axial direction of the bushing. In the above embodiment, the curved portion has greater flexibility, and when the bush deflects in the mounting hole, the curved portion can stretch, compress and the like along with the deflection of the bush, while the base portion can still maintain the sealing state with the cylinder head cover and the lip portion can still maintain the sealing state with the bush, so that the sealing device has stronger adjusting capability and compensation capability.
Description
Technical Field
The utility model relates to an engine oil blanket technical field especially relates to a sealing device.
Background
Generally, a mounting hole is formed in a cylinder cover, a bushing of an ignition coil is arranged in the mounting hole in a penetrating manner, and the ignition coil is arranged in the bushing; in order to prevent oil leakage in the cylinder head cover, it is necessary to seal between the cylinder head cover and the liner.
At present, radial and axial sealing is generally realized by filling a gap between a cylinder head cover and a lining through an O-shaped sealing ring, but the adjusting and compensating capabilities of the O-shaped sealing ring are limited, and the problem of leakage caused by insufficient compensation amount is easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sealing device for solve exist among the prior art because O shape sealing washer's regulation, compensation ability are limited, lead to appearing the not enough problem of seepage of compensation volume.
An embodiment of the utility model provides a sealing device, this sealing device are used for sealed ignition coil's bush and cylinder head cover, the bush is worn to locate in the mounting hole of cylinder head cover, this sealing device is located including the cover basal portion, flexion, the lip in the bush outside, wherein:
the base is used for being in sealing connection with the surface of the cylinder head cover;
the lip is used for sealing connection with the surface of the bushing;
the curved portion connects the base portion and the lip portion, and a body length of the curved portion is larger than an axial length of the curved portion in the axial direction of the bush.
In the above embodiment, because the length of the body of the bending portion is greater than the axial length of the bending portion along the axial direction of the bushing, the bending portion has greater flexibility, when the bushing deflects in the mounting hole, the bending portion can stretch, compress and the like along with the deflection of the bushing, the base portion can still maintain the sealing state with the cylinder head cover, and the lip portion can still maintain the sealing state with the bushing.
Optionally, the lip portion includes a main lip and an air seal lip connected to a root portion of the main lip and protruding toward the cylinder head cover side.
In the optional embodiment, when the pressure of the medium in the cylinder is increased suddenly, the air sealing lip can be pushed to cling to the lining, so that the auxiliary sealing effect is realized, and air leakage is avoided.
Optionally, a surface of the lip portion disposed away from the bushing is provided with a hoop for pressing the lip portion against the bushing.
In the above optional embodiment, the hoop has a certain locking force, so that the lip and the bushing can be always attached to each other, and the separation of the sealing surface caused by eccentricity is avoided.
Optionally, the surface of the lip portion, which faces away from the bushing, is further provided with an annular groove matched with the hoop, and the hoop is clamped in the annular groove.
In the above optional embodiment, the annular groove has a limiting effect on the hoop, and the hoop is clamped in the annular groove, so that the structure is more stable.
Optionally, a seal cavity is formed between the inner surface of the curved portion and the base portion disposed toward the liner and the liner, the seal cavity communicating with a gap between the cylinder head cover and the liner.
Optionally, the base includes an annular skeleton and a sealing portion disposed on an inner ring side of the annular skeleton;
the bottom surface of the sealing part protrudes out of the bottom surface of the annular framework;
the annular framework is used for being fixedly connected with the cylinder head cover and enabling the bottom surface of the sealing part to press the surface of the cylinder head cover.
Alternatively, the base portion comprises a sealing portion and a fixing portion having an annular structure, wherein:
the sealing part is arranged on the surface of the cylinder head cover and comprises a pressed surface arranged away from the cylinder head cover;
the fixing part comprises a pressing surface matched with the pressed surface of the sealing part, and the fixing part is used for being fixedly connected with the cylinder head cover and enabling the pressing surface to press the pressed surface of the sealing part so as to enable the sealing part to be sealed with the surface of the cylinder head cover.
Optionally, an accommodating groove for accommodating the sealing portion is formed in the inner ring side of the fixing portion, the depth of the accommodating groove is smaller than the thickness of the sealing portion, and the top wall of the accommodating groove forms the extrusion surface.
Optionally, a projection of the lip portion and the curved portion on the cylinder head cover surface is located within a projection of the sealing portion on the cylinder head cover surface.
In the above alternative embodiment, the sealing portion has a larger contact area with the cylinder head cover, so that the sealing effect can be improved.
Optionally, the lip, the curved portion, and the sealing portion are of an integrally formed structure.
Drawings
For a better understanding of the present invention, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views.
Fig. 1 is a cross-sectional view of a sealing device according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of the sealing device provided in the embodiment of the present invention after being assembled with a liner and a cylinder head cover;
FIG. 3 is a schematic cross-sectional view of a lip of the seal assembly shown in FIG. 1;
FIG. 4 is a cross-sectional view of the base of the sealing device shown in FIG. 1;
fig. 5 is a cross-sectional view of another base provided in an embodiment of the present invention.
Reference numerals:
10-base
11-annular framework 12-sealing part 13-fixing part
20-bending part
30-lip part
31-main lip 32-air seal lip
301-annular groove 302-concavity
40-hoop
50-liner
60-cylinder head cover
70-fastening bolt
80-pressing plate
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
The embodiment of the utility model provides a sealing device for solve exist among the prior art because O shape sealing washer's regulation, compensation ability are limited, lead to appearing the not enough problem of seepage of compensation volume.
As shown in fig. 1 and 2, the sealing device is used for sealing a liner 50 of an ignition coil and a cylinder head cover 60, a mounting hole is formed in the cylinder head cover 60, and the liner 50 is inserted into the mounting hole of the cylinder head cover 60; the sealing device specifically comprises a base 10 sleeved outside a bushing 50, a bending part 20 and a lip part 30, wherein:
the base 10 is used for sealing connection with the surface of the cylinder head cover 60;
the lip 30 is used for surface sealing connection with the bushing 50;
the curved portion 20 connects the base portion 10 and the lip portion 30, and a body length of the curved portion 20 is larger than an axial length of the curved portion 20 in an axial direction of the bush 50.
In the sealing device, the base 10, the bending part 20 and the lip part 30 are sequentially arranged along the axial direction of the lining 50 and the direction departing from the cylinder head cover 60, and each part has an annular structure and is sleeved outside the lining 50; wherein the sealing means is sealingly connected at a lower end with a surface of the cylinder head cover 60 via the base 10 and at an upper end with a surface of the liner 50 via the lip 30, such that the sealing means achieves a sealing effect between the cylinder head cover 60 and the liner 50.
In addition to the sealing effect, the connecting portion between the base 10 and the lip 30 of the sealing device is bent to form the bending portion 20, and the length of the body of the bending portion 20 is greater than the axial length of the bending portion 20 along the axial direction of the bushing 50, where the length of the body of the bending portion 20 is the total length of the bending portion 20 after the bending portion 20 is straightened, and the axial length of the bending portion 20 along the axial direction of the bushing 50 is the axial distance between the two ends of the bending portion 20 in the bent state.
In the sealing device, the bending portion 20 is in a free state, so that the bending portion 20 has greater flexibility, when the bushing 50 is displaced in the mounting hole, the bending portion 20 can be stretched, compressed and the like along with the displacement of the bushing 50, the base portion 10 can still maintain a sealing state with the cylinder head cover 60, and the lip portion 30 can still maintain a sealing state with the bushing 50, so that the sealing device has stronger adjusting and compensating capabilities.
Specifically, when the lip portion 30 is provided, as shown in fig. 3, the lip portion 30 includes a main lip 31 and an air seal lip 32 connected to a root portion of the main lip 31 and protruding toward the cylinder head cover 60.
Specifically, the main lip 31 is closely attached to the surface of the bush 50, and sealing is achieved; the air sealing lip 32 is a protruding structure which is formed by the inner side of the root of the main lip 31 and protrudes towards the direction close to the cylinder head cover 60, when the medium pressure in the cylinder is increased suddenly, the air sealing lip 32 can be pushed to cling to the lining 50, the effect of auxiliary sealing is realized, and air leakage is avoided.
As shown in fig. 1 and 3, the curved portion 20 is also connected to the root portion of the main lip 31, the curved portion 20 is curved outward, a cavity 302 is formed between the curved portion 20 and the air sealing lip 32, and after the air enters the cavity 302, the surface of the air sealing lip 32 is pressed to make the air sealing lip 32 adhere to the bushing 50.
With continued reference to fig. 1, the surface of the lip 30 that is disposed away from the bushing 50 is provided with a hoop 40, the hoop 40 being used to compress the lip 30 against the bushing 50. The hoop 40 has a certain locking force and can tightly hold the lip 30, so that the sealing surface of the lip 30 is tightly attached to the surface of the bushing 50, and the sealing effect between the lip 30 and the bushing 50 is increased; meanwhile, when the bush 50 is deviated, a gap between the sealing surfaces of the bush 50 and the lip 30 can be avoided, and the lip 30 and the bush 50 are always in a close fit state.
Specifically, the hoop 40 is an annular structure made of an elastic material. The hoop 40 is deformed to tightly grip the outside of the lip 30 and to hold the lip 30 tightly under the elastic restoring force.
In the sealing device shown in fig. 1, the lip portion 30 includes a main lip 31 and an air seal lip 32, and the hoop 40 is disposed on a surface of the main lip 31 disposed away from the bushing 50, so that the sealing effect between the main lip 31 and the bushing 50 is enhanced.
Further, the surface of the lip 30 facing away from the bushing 50 is provided with an annular groove 301 for engaging with the hoop 40, and the hoop 40 is clamped in the annular groove 301.
The annular groove 301 can position the hoop 40, so that the hoop 40 can be accurately installed on the corresponding position of the surface of the lip 30 when being installed; meanwhile, after the hoop 40 is clamped in the annular groove 301, relative displacement between the hoop 40 and the lip 30 can be avoided, for example, the hoop 40 is prevented from being separated from the upper end of the lip 30, so that the structure is more stable.
Accordingly, as shown in FIG. 3, an annular groove 301 is provided on the surface of the main lip 31 disposed away from the liner 50 to define the hoop 40 outside the main lip 31 to enhance the sealing effect between the main lip 31 and the liner 50.
It should be noted that in any of the above embodiments, the lip 30 is made of an elastic material, such as rubber, so that the lip 30 can be tightly attached to the bushing 50 by deformation.
For the bending portion 20, specifically, the bending portion 20 is also made of an elastic material, such as a rubber material, so that the bending portion 20 is easy to deform and has good flexibility; the bent portion 20 may have an S-shape, an arc shape, or the like, and is not particularly limited herein.
Gaps are provided between inner surfaces of the curved portion 20 and the base portion 10, which are respectively disposed toward the liner 50, and a seal cavity is formed, which communicates with the gap between the cylinder head cover 60 and the liner 50.
Specifically, since the seal device is sealingly connected at the lower end to the surface of the cylinder head cover 60 via the base 10 and at the upper end to the surface of the liner 50 via the lip 30, oil and gas entering the seal cavity do not leak and flow back into the gap between the liner 50 and the cylinder head cover 60 by gravity.
Specifically, when the base 10 is provided, as shown in fig. 4, the base 10 includes an annular frame 11 and a sealing portion 12 provided on an inner side of the annular frame 11;
the bottom surface of the seal portion 12 protrudes beyond the bottom surface of the annular frame 11;
the ring-shaped frame 11 is used to be fixedly connected with the head cover 60 and press the bottom surface of the sealing portion 12 against the surface of the head cover 60.
Specifically, the sealing portion 12 is an annular structure made of a rubber material, and the sealing portion 12 can be compressed and deformed under the action of external force and is tightly attached to the surface of the cylinder head cover 60, so that the sealing with the surface of the cylinder head cover 60 is realized.
The annular framework 11 is a framework structure made of metal materials, and the annular framework 11 and the sealing part 12 are connected into a whole through vulcanization.
The bottom surface of the annular frame 11 and the bottom surface of the sealing portion 12 are not on the same horizontal plane, and have a height difference Δ h therebetween, specifically, the bottom surface of the sealing portion 12 protrudes beyond the bottom surface of the annular frame 11, as shown in fig. 4, in a state where the base portion 10 and the cylinder head cover 60 are not assembled, if a horizontal plane AA' is taken as a reference, the bottom surface of the annular frame 11 is located at a height greater than the bottom surface of the sealing portion 12 in the height direction.
With continued reference to fig. 4, in the unassembled state of the base 10 and the cylinder head cover 60, a gap is formed between the bottom surface of the annular frame 11 and the cylinder head cover 60, and the bottom surface of the sealing portion 12 contacts the cylinder head cover 60, if the annular frame 11 is pressed downward, as the annular frame 11 is connected with the sealing portion 12, the sealing portion 12 will be compressed in the process of gradually approaching the cylinder head cover 60, until the sealing portion 12 and the cylinder head cover 60 are tightly attached together, at this time, the annular frame 11 is fixed on the surface of the cylinder head cover 60, so that the sealing portion 12 and the cylinder head cover 60 are kept in a tightly attached state, thereby achieving sealing.
Specifically, the ring frame 11 may be fixedly connected to the cylinder head cover 60 by fasteners 70. The number of the fastening members 70 may be plural and distributed circumferentially so that the annular fastening member 11 is uniformly stressed and the sealing portion 12 can be brought into close contact with the cylinder head cover 60 around the liner 50, achieving a good sealing effect.
Further, a pressing plate 80 is arranged between the fastening member 70 and the base 10, through holes corresponding to the fastening members 70 one to one are formed in the pressing plate 80, the pressing plate 80 extends to the upper surface of the sealing portion 12, and after the fastening member 70 is screwed down, the pressing plate 80 presses the sealing portion 12 downward, so that the sealing portion 12 is uniformly stressed and is in close contact with the cylinder head cover 60.
As shown in fig. 1 and 2, when the bottom surface of the annular frame 11 contacts the cylinder head cover 60, a height difference Δ h between the annular frame 11 and the bottom surface of the seal portion 12 is a compression amount by which the seal portion 12 is compressively deformed.
The base part 10 of the sealing device may also adopt other structural forms besides the above-mentioned structural form, for example, the base part 10 includes a fixing part 13 and a sealing part 12 having a ring structure, wherein:
the seal portion 12 is provided on the surface of the cylinder head cover 60, including a pressed surface disposed away from the cylinder head cover 60;
the fixing portion 13 includes a pressing surface that engages with a pressed surface of the sealing portion 12, and the fixing portion 13 is configured to be fixedly connected to the head cover 60 and to cause the pressing surface to press the pressed surface of the sealing portion 12, so that the sealing portion 12 is sealed with the surface of the head cover 60.
In short, the principle of the structure is: sealing is achieved by pressing the sealing portion 12 downward from the top of the sealing portion 12 by the fixing portion 13, and the bottom surface of the sealing portion 12 is brought into close contact with the head cover 60, and at this time, the fixing portion 13 is fixed to the surface of the head cover 60, so that the sealing portion 12 and the head cover 60 are maintained in such a close contact state.
Specifically, the fixing portion 13 may be a cover plate having a through hole structure, and the cover plate is sleeved outside the bushing 50 and fixed to the cylinder head cover 60 after the sealing portion 12 is compressed.
Alternatively, the inner ring side of the fixing portion 13 is provided with a receiving groove (not shown) for receiving the sealing portion 12, the depth of the receiving groove is smaller than the thickness of the sealing portion 12, and the top wall of the receiving groove forms a pressing surface.
As shown in fig. 5, in the state where the base 10 and the cylinder head cover 60 are not assembled, since the groove depth of the receiving groove is smaller than the thickness of the sealing part 12, the bottom surface of the sealing part 12 protrudes out of the receiving groove; with continued reference to fig. 5, the bottom surface of the sealing portion 12 contacts the head cover 60, a gap is formed between the bottom surface of the fixing portion 13 and the head cover 60, and if the fixing portion 13 is pressed downward, the top wall of the receiving groove presses the sealing portion 12, and after the sealing portion 12 is pressed, the bottom surface thereof is tightly attached to the head cover 60, and at this time, the fixing portion 13 is fixed to the surface of the head cover 60, so that the sealing portion 12 and the head cover 60 are maintained in such a tightly attached state.
Specifically, the fixing portion 13 may be fixedly connected to the cylinder head cover 60 by fastening bolts.
It should be noted that in any of the above embodiments, the sealing portion 12 is made of an elastic material, such as a rubber material, so that the sealing portion 12 can be compressed and deformed to be closely attached to the cylinder head cover 60.
In this sealing device, as a whole, the projection of the lip portion 30 and the curved portion 20 on the surface of the cylinder head cover 60 is located within the projection of the sealing portion 12 on the surface of the cylinder head cover 60, and the sealing portion 12 extends radially outward to form a protruding structure that protrudes beyond the lip portion 30 and the curved portion 20.
In this way, the sealing portion 12 and the head cover 60 have a large contact area therebetween, and the sealing effect can be enhanced.
In addition, the lip portion 30, the curved portion 20 and the sealing portion 12 are integrally formed, and specifically, a rubber member may be prepared and formed by an integral forming process using a rubber material, and the rubber member includes the lip portion 30, the curved portion 20 and the sealing portion 12.
As can be seen from the above description, in the embodiment of the present invention, the sealing device is configured to have the bending portion between the base portion and the lip portion, and the bending portion is stretched and compressed to deform, so that when the liner is deviated in the mounting hole, the base portion can still maintain the sealing state with the cylinder head cover, and the lip portion can still maintain the sealing state with the liner.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A sealing device is used for sealing a lining and a cylinder head cover of an ignition coil, wherein the lining is arranged in a mounting hole of the cylinder head cover in a penetrating way, and is characterized by comprising a base part, a bending part and a lip part which are sleeved on the outer side of the lining, wherein:
the base part is used for being in sealing connection with the surface of the cylinder head cover;
the lip portion is used for sealing connection with the surface of the lining sleeve;
the curved portion connects the base portion and the lip portion, and a body length of the curved portion is larger than an axial length of the curved portion in the axial direction of the bush.
2. The sealing device according to claim 1, wherein the lip portion includes a main lip and an air seal lip connected to a root portion of the main lip and protruding toward the cylinder head cover side.
3. A sealing device according to claim 1 or 2, wherein the surface of the lip located away from the bushing is provided with a collar for pressing the lip against the bushing.
4. A sealing device according to claim 3, wherein the surface of the lip located away from the bushing is further provided with an annular groove for cooperation with the collar, the collar being captured in the annular groove.
5. The sealing device according to claim 1 or 2, wherein a seal cavity is formed between an inner surface of the curved portion and the base portion disposed toward the liner and the liner, the seal cavity communicating with a gap between the head cover and the liner.
6. The sealing device of claim 1, wherein the base includes an annular skeleton and a sealing portion disposed on an inner annular side of the annular skeleton;
the bottom surface of the sealing part protrudes out of the bottom surface of the annular framework;
the annular framework is used for being fixedly connected with the cylinder head cover and enabling the bottom surface of the sealing part to press the surface of the cylinder head cover.
7. The sealing device of claim 1, wherein the base portion comprises a sealing portion and a securing portion having an annular configuration, wherein:
the sealing part is arranged on the surface of the cylinder head cover and comprises a pressed surface arranged away from the cylinder head cover;
the fixing part comprises a pressing surface matched with the pressed surface of the sealing part, and the fixing part is used for being fixedly connected with the cylinder head cover and enabling the pressing surface to press the pressed surface of the sealing part so as to enable the sealing part to be sealed with the surface of the cylinder head cover.
8. The seal of claim 7, wherein the inner ring side of the anchor portion is provided with a receiving groove for receiving the seal portion, the receiving groove having a groove depth less than the thickness of the seal portion, and a top wall of the receiving groove forming the pressing surface.
9. A sealing arrangement according to any one of claims 6 to 8, wherein the projection of the lip portion and the curved portion on the cylinder head cover surface lies within the projection of the sealing portion on the cylinder head cover surface.
10. A seal according to any one of claims 6 to 8, wherein the lip portion, the curved portion and the seal portion are of one-piece construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021486.2U CN214789020U (en) | 2021-01-06 | 2021-01-06 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021486.2U CN214789020U (en) | 2021-01-06 | 2021-01-06 | Sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214789020U true CN214789020U (en) | 2021-11-19 |
Family
ID=78743976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120021486.2U Active CN214789020U (en) | 2021-01-06 | 2021-01-06 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214789020U (en) |
-
2021
- 2021-01-06 CN CN202120021486.2U patent/CN214789020U/en active Active
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