A new type of skeleton sealing gasket and engine

Abstract

The application discloses a novel skeleton sealing gasket and an engine. The sealing gasket is located between two mutually independent connecting pieces. The sealing gasket comprises a gasket main body and a supporting skeleton connected with the gasket main body. The gasket main body comprises a sealing part abutting against the connecting pieces. The sealing part is oppositely provided with two sealing lips abutting against the two connecting pieces. Each sealing lip comprises a first state of extension and a second state of compression. The supporting skeleton is arranged to strengthen the positioning strength of the gasket main body and to assist in strengthening the rigidity of the sealing gasket. The two sealing lips arranged on the sealing part are abutted against the two connecting pieces, the contact surface of the sealing gasket and the connecting pieces is further reduced, and the adhesion of the sealing gasket is avoided. The first state and the second state of the sealing lip are correspondingly matched with the gap change between the two connecting pieces, so that the sealing lip can realize the gap sealing between the two connecting pieces in the cold state and the hot state. The good and stable sealing effect is realized while the adhesion is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of sealing tools, and particularly relates to a novel skeleton sealing gasket and engine. BACKGROUND

[0002] A sealing gasket is a material or combination of materials clamped between two independent connecting pieces, which functions to ensure the sealing between the two connecting pieces within a predetermined service life. The sealing gasket needs to be able to seal the joint surface between the two connecting pieces and be impermeable and non-corrosive to the sealing medium, and be able to withstand temperature and pressure.

[0003] The existing sealing gasket, due to the material and the material of the two connecting pieces, will change the gap between the two connecting pieces in cold and hot states, which is easy to cause the sealing to be not tight. In the prior art, rubber material is used as the sealing gasket, and the elastic deformation of the rubber material is used to overcome the gap change. However, the rubber gasket does not have a positioning skeleton during installation, which on the one hand leads to difficult positioning during assembly and hidden oil leakage in subsequent use, and on the other hand, due to the large contact surface, the rubber gasket is easy to stick after long-term use, which will cause damage to the sealing part during disassembly and assembly, and the rubber gasket needs to be replaced many times, which increases the use cost. If the part stuck to the connecting piece is not removed, it will cause the second assembly to be not tight, and if the part stuck to the connecting piece is removed, it will seriously affect the disassembly and assembly efficiency due to the inconvenience of operation. SUMMARY

[0004] The application provides a novel skeleton sealing gasket and engine, which solves the problems of low structural strength of the existing sealing gasket, easy displacement during use, and sticking caused by large contact area during sealing.

[0005] The technical scheme adopted by the application is as follows:

[0006] A novel skeleton sealing gasket, the sealing gasket is located between two mutually independent connecting pieces, the sealing gasket comprises a gasket main body and a support skeleton connected with the gasket main body, the gasket main body comprises a sealing part abutting against the connecting pieces, the sealing part is provided with two sealing lips abutting against the two connecting pieces, and each sealing lip comprises a stretched first state and a compressed second state.

[0007] Preferably, the gasket main body extends inward from the sealing lip to form a necked part, and the diameter of the necked part gradually decreases along the extension direction, and the support skeleton at least passes through part of the necked part.

[0008] Preferably, the sealing part is provided with an oil groove, and the two oil grooves form the sealing lip.

[0009] Preferably, the gasket body is provided with multiple sealing lips at intervals, and the sealing part is formed with a V-shaped recess as the oil passage, and the top of the sealing lip is flush with the top of the oil passage in the second state.

[0010] Preferably, one end of the support skeleton is located in the gasket body, and the other end is provided with a limiting fin connected with at least one of the connecting pieces.

[0011] Preferably, the support skeleton is circumferentially arranged along the inner side of the sealing gasket, and the limiting fins are circumferentially arranged at intervals along the support skeleton.

[0012] Preferably, the limiting fin comprises a positioning section connected with the support skeleton and a bending section formed along the positioning section, and the included angle between the bending section and the positioning section is less than 90°.

[0013] Preferably, the gasket body and the support skeleton, and / or the support skeleton and the limiting fin are integrally formed.

[0014] An engine comprising a cylinder head and a camshaft housing, wherein the cylinder head and the camshaft housing are provided with the sealing gasket according to any one of the above.

[0015] Preferably, the diameter D of the sealing part is greater than or equal to 7mm, and the distance d between the end of the support skeleton located in the gasket body and the center of the sealing part is in the range of (0-1.5)D / 2.

[0016] As the above technical solutions are adopted, the application has the following beneficial effects:

[0017] (1) The present application strengthens the positioning strength of the gasket body by arranging the support skeleton, and assists in strengthening the rigidity of the sealing gasket, so that the sealing gasket has not only a sealing part for realizing elastic sealing effect, but also better support strength, avoiding unstable positioning and displacement due to low structural strength during deformation, and compared with the existing sealing gasket, the contact area is small, the assembly pressure is small, which is conducive to reducing the influence of the sealing gasket on other assembly parts. By arranging two sealing lips corresponding to two connecting pieces in the sealing part, the contact area between the sealing gasket and the connecting pieces is further reduced, and the sealing gasket is avoided to be bonded. The first state and the second state of the sealing lip correspond to the gap change between the two connecting pieces, so that the connecting pieces can realize the gap sealing between the two connecting pieces in the cold state and the hot state, and realize good and stable sealing effect while avoiding bonding.

[0018] (2) Set the neck part and sealing part combination, the cross section of the gasket body is like a water drop, the support skeleton at least through part of the neck part, then one end of the support skeleton is in the neck part or through the neck part in the sealing part, so as to ensure the sealing effect of the sealing lip of the sealing part to the connecting piece, and to ensure the stable connection of the sealing part and the support skeleton, so as to realize the shaping and installation positioning of the sealing gasket.

[0019] (3) By setting the oil groove in the sealing part, and the oil groove is located on both sides of the sealing lip, on the one hand, the opening of the oil groove can provide deformation space for the middle sealing lip, so that the sealing lip can deform to realize stable sealing when the gap changes, on the other hand, the groove bottom can store part of the lubricating oil, so as to strengthen the protection of the sealing gasket.

[0020] (4) Through the multiple sealing lips of the gasket body, the two connecting pieces are sealed at multiple places, and the two V-shaped oil grooves sandwich a sealing lip, and the oil groove and the sealing lip form a W-shaped sealing structure, in the second state, the sealing lip is contracted under pressure to be parallel to the top of the oil groove, that is, the top of the sealing lip and the top of the oil groove are in contact with the connecting piece at this time, so as to form multiple seals, and still maintain a small contact area, and strengthen the sealing effect.

[0021] (5) By setting the limiting fin, the installation position of the gasket body is determined, and the limiting fin is connected with the connecting piece to limit the position of the gasket body, so that the gasket body is positioned by the limiting fin and the support skeleton during the working process of the device, avoiding displacement of the gasket body due to vibration and friction, so as to ensure the stable abutment of the sealing part and the two connecting pieces, and realize good sealing effect of the two connecting pieces, and the positioning and installation are convenient, and since the sealing gasket realizes abutment sealing effect through the sealing part of the gasket body, the contact area is small, the assembly pressure is small, which is conducive to reducing the influence of the sealing gasket on other assembly parts, and the limiting fin provides sufficient contact strength for the sealing gasket, so as to effectively avoid the adhesion caused by large area sealing contact, reduce the wear of the sealing gasket, prolong its service life, and reduce the replacement cost.

[0022] (6) By circumferentially arranging the support skeleton, the gasket body is supported as a whole, so as to strengthen the overall strength of the sealing gasket, and multiple limiting fins are arranged to connect and position the sealing gasket as a whole, so as to strengthen the positioning stability of the sealing gasket as a whole, and avoid vibration deviation, so as to realize good sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0024] Figure 1 Structure diagram of the sealing gasket in an embodiment of the present application;

[0025] Figure 2 Working state diagram of the limiting fin in an embodiment of the present application;

[0026] Figure 3 Sectional diagram of the sealing gasket in an embodiment of the present application;

[0027] Figure 4 Assembly diagram of the sealing gasket in an embodiment of the present application;

[0028] Figure 5 Another angle assembly diagram of the sealing gasket in an embodiment of the present application.

[0029] Explanation of reference signs:

[0030] 1-sealing gasket, 11-gasket body, 110-sealing part, 111-necked part, 112-sealing lip, 113-oil passage, 12-supporting framework, 13-limiting fin, 131-positioning section, 132-bent section, 14-cylinder head, 15-camshaft box. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0032] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment can be combined with each other without conflict.

[0033] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like, should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, and can also be communication; can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0036] The present application provides a new type of skeleton sealing gasket, as shown in Figures 1 to 5 The sealing gasket 1 is located between two independent connecting pieces, and the sealing gasket 1 comprises a gasket body 11 and a support skeleton 12 connected with the gasket body 11. The gasket body 11 comprises a sealing part 110 abutting against the connecting pieces, and the sealing part 110 is provided with two sealing lips 112 abutting against the two connecting pieces. Each sealing lip 112 comprises a first state of extension and a second state of compression.

[0037] The present application strengthens the positioning strength of the gasket body 11 by providing the support skeleton 12, and assists in strengthening the rigidity of the sealing gasket 1, so that the sealing gasket 1 has not only the sealing part 110 for realizing the elastic sealing effect, but also better support strength, avoiding unstable positioning and displacement due to low structural strength during deformation. Compared with the existing sealing gasket 1, the contact area is small, the assembly pressure is small, and it is beneficial to reduce the influence of the sealing gasket 1 on other assembly parts. By providing two sealing lips 112 corresponding to the two connecting pieces abutting against each other on the sealing part 110, the contact area of the sealing gasket 1 and the connecting pieces is further reduced, avoiding the adhesion of the sealing gasket 1. The first state and the second state of the sealing lip 112 correspond to the gap change between the two connecting pieces, so that the sealing lip 112 can realize the gap sealing between the two connecting pieces in the cold state and the hot state, and realize good and stable sealing effect while avoiding adhesion.

[0038] Further, as shown in Figure 3 The gasket body 11 extends inwardly from the sealing lip 112 to form a necked portion 111, and the diameter of the necked portion 111 gradually decreases along the extension direction, and the support skeleton 12 at least passes through part of the necked portion 111.

[0039] The necked portion 111 is arranged in combination with the sealing portion 110, so that the cross section of the gasket body 11 is in the shape of a water droplet, and the support skeleton 12 at least passes through part of the necked portion 111, so that one end of the support skeleton 12 is located in the necked portion 111 or passes through the necked portion 111 and is located in the sealing portion 110, thereby ensuring the sealing effect of the sealing lip 112 of the sealing portion 110 on the connecting piece, and ensuring the stable connection of the sealing portion 110 and the support skeleton 12, so as to realize the shaping and installation positioning of the sealing gasket 1.

[0040] As an embodiment of the embodiment, as shown in Figure 3 The sealing portion 110 is provided with an oil passing groove 113, and the sealing lip 112 is formed between the two oil passing grooves 113.

[0041] By arranging the oil passing groove 113 in the sealing portion 110, and the oil passing groove 113 being located on both sides of the sealing lip 112, on the one hand, the opening of the oil passing groove 113 can provide a deformation space for the sealing lip 112 in the middle, so that the sealing lip 112 can deform to realize stable sealing when the gap changes, and on the other hand, the groove bottom can store part of the lubricating oil, thereby enhancing the protection of the sealing gasket 1.

[0042] Preferably, the gasket body 11 is provided with multiple sealing lips 112 at intervals, the sealing portion 110 is in the shape of a V-shaped recess to form the oil passing groove 113, and in the second state, the top of the sealing lip 112 is flush with the top of the oil passing groove 113.

[0043] The multiple sealing lips 112 of the gasket body 11 realize multiple abutting seals on the two connecting pieces, and the two V-shaped oil passing grooves 113 sandwich one sealing lip 112, and the oil passing groove 113 and the sealing lip 112 form a sealing structure in the shape of W, and in the second state, the sealing lip 112 is contracted under pressure to be parallel to the top of the oil passing groove 113, that is, at this time, the top of the sealing lip 112 and the top of the oil passing groove 113 abut against the connecting pieces, thereby forming multiple seals, and still maintaining a small contact area, thereby enhancing the sealing effect.

[0044] It should be noted that when the sealing lip 112 is flush with the oil passing groove 113, the sealing lip 112 can be pressed to just reach the highest position of the oil passing groove 113, or the sealing lip 112 and the oil passing groove 113 can be elastically deformed under pressure at the same time.

[0045] In an embodiment, as shown in Figures 1 to 3As shown, one end of the support framework 12 is located in the gasket body 11, and the other end is provided with a limiting fin 13 connected with at least one of the connecting pieces.

[0046] The limiting fin 13 provides sufficient contact strength for the sealing gasket 1, so that the adhesion caused by large-area sealing contact can be effectively avoided, the loss of the sealing gasket 1 is reduced, the service life is prolonged, and the replacement cost is reduced. At the same time, the gasket body 11 cooperates with the limiting fin 13 to facilitate the determination of the installation position of the gasket body 11, and the limiting fin 13 is connected with the connecting piece to limit the position of the gasket body 11, so that the gasket body 11 is positioned by the limiting fin 13 and the support framework 12 during the working process of the device, and the displacement of the gasket body 11 caused by vibration and friction is avoided, thereby facilitating the stable abutment of the sealing part 110 with the two connecting pieces and achieving good sealing effect of the two connecting pieces.

[0047] In an embodiment, the support framework 12 is circumferentially arranged along the inner side of the sealing gasket 1, and the limiting fins 13 are circumferentially arranged at intervals along the support framework 12.

[0048] By circumferentially arranging the support framework 12, the gasket body 11 is supported as a whole, thereby enhancing the overall strength of the sealing gasket 1, and multiple limiting fins 13 are arranged to connect and position the sealing gasket 1 at multiple positions, thereby enhancing the positioning stability of the sealing gasket 1 and avoiding vibration deviation, thereby achieving good sealing effect.

[0049] As shown in Figure 1 , Figure 2 and Figure 4 , Figure 5 , the circumferentially arranged support framework 12 is for a ring-shaped sealing gasket 1, and if the sealing gasket 1 is of other shapes, the support framework 12 can be arranged according to the shape of the sealing gasket 1.

[0050] In an embodiment, as shown in Figure 2 , Figure 5 , the limiting fin 13 includes a positioning segment 131 connected with the support framework 12 and a bending segment 132 extending from the positioning segment 131, and the included angle between the bending segment 132 and the positioning segment 131 is less than 90°.

[0051] In this embodiment, the limiting fin 13 is connected with the connecting piece through the bending segment 132, and the bending segments 132 of multiple limiting fins 13 can be bent towards one connecting piece or respectively bent towards two connecting pieces, both of which can achieve the positioning effect of the sealing gasket 1. The included angle between the bending segment 132 and the positioning segment 131 is set to an acute angle, so that the connection relationship between the bending segment 132 and the connecting piece is more stable.

[0052] Alternatively, the bent rear end of the bending section 132 is wrapped around the connecting piece to achieve good positioning effect.

[0053] Preferably, the limiting fin 13 is bent towards the connecting piece below the installation direction, which is more convenient for bending operation and helps to position the sealing gasket 1 accurately.

[0054] In a preferred embodiment, the gasket body 11 is integrally formed with the support skeleton 12, and / or the support skeleton 12 is integrally formed with the limiting fin 13.

[0055] Preferably, the gasket body 11 is integrally formed with the support skeleton 12 and the limiting fin 13 to improve the overall stability of the sealing gasket 1.

[0056] The scheme also includes an engine, as shown in Figure 4 、 Figure 5 The engine includes a cylinder head 14 and a camshaft housing 15, and the sealing gasket 1 according to any one of the above is arranged between the cylinder head 14 and the camshaft housing 15.

[0057] The sealing gasket 1 is arranged between the cylinder head 14 and the camshaft housing 15, and the elastic deformation of the sealing part 110 achieves the sealing between the cylinder head 14 and the camshaft housing 15. The combustion in the cylinder and the movement of the rocker arm and the camshaft cause large vibrations, which cause the sealing gasket 1 to withstand the fretting caused by the vibrations. The sealing lip 112 of the sealing gasket 1 provides elastic support for sealing, and the oil groove 113 cooperates with the sealing lip 112 to facilitate the formation and maintenance of lubrication, thereby preventing friction adhesion and protecting the sealing gasket 1.

[0058] Preferably, the diameter D of the sealing part 110 is greater than or equal to 7 mm, and the distance d between the end of the support skeleton 12 located in the gasket body 11 and the center of the sealing part 110 is in the range of (0-1.5)D / 2.

[0059] If the distance between the support skeleton 12 and the sealing part 110 is too large, the support effect on the gasket body 11 cannot be achieved, which affects the shaping and positioning function of the sealing gasket 1. If the support skeleton 12 penetrates the entire gasket body 11, the gasket body 11 becomes too hard, which is not conducive to maintaining the overall flexibility of the gasket body 11. Therefore, in this embodiment, the shape of the cylinder head 14 and the camshaft housing 15 is considered.

[0060] It can be understood that when the sealing gasket 1 is applied to the sealing of other connecting pieces, the diameter of the sealing part 110 and the distance between the support skeleton 12 and the center of the sealing part 110 can be adjusted according to actual application requirements.

[0061] Preferably, the gasket body 11 is made of fluororubber material, which can achieve good oil and temperature resistance, and the fluororubber is vulcanized to prevent corrosion of the steel structure, and the surface hardness thereof can be treated according to actual process requirements. The oil and temperature resistance of the gasket body 11 in combination with the special matching structure of the support framework 12 realizes the stable sealing effect of the sealing gasket 1.

[0062] The places not mentioned in the application can be realized by using or referring to the existing technology.

[0063] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0064] The above only describes the embodiments of the application and is not used to limit the application. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the scope of the claims of the application.

Claims

1. A new type of gasket seal, the gasket seal (1) being located between two mutually independent connecting pieces, characterized in that, The sealing gasket (1) comprises a gasket body (11) and a supporting framework (12) connected with the gasket body (11), the gasket body (11) comprises a sealing part (110) abutting against the connecting piece, the sealing part (110) oppositely has two sealing lips (112) abutting against two connecting pieces, each of the sealing lips (112) comprises a first state of extension and a second state of compression; the gasket body (11) extends inward from the sealing lip (112) to form a necked part (111), and the diameter of the necked part (111) gradually decreases along the extending direction, the supporting framework (12) at least passes through part of the necked part (111), the necked part (111) and the sealing part (110) are combined to make the cross section of the gasket body (11) in the shape of a water drop; the sealing part (110) is provided with oil passing grooves (113), the two oil passing grooves (113) form the sealing lip (112) therebetween; the gasket body (11) is provided with multiple sealing lips (112) at intervals, the sealing part (110) is V-shaped and concave to form the oil passing grooves (113), and the top of the sealing lip (112) is flush with the top of the oil passing groove (113) in the second state.

2. A novel skeleton gasket according to claim 1, wherein One end of the supporting framework (12) is located in the gasket body (11), and the other end is provided with a limiting fin (13) connected with at least one of the connecting pieces.

3. A novel skeleton gasket according to claim 2, wherein The supporting framework (12) is circumferentially arranged along the inner side of the sealing gasket (1), and the limiting fin (13) is circumferentially arranged at intervals along the supporting framework (12).

4. A novel skeleton gasket according to claim 2, wherein The limiting fin (13) comprises a positioning segment (131) connected with the supporting framework (12) and a bending segment (132) extending from the positioning segment (131), and the included angle between the bending segment (132) and the positioning segment (131) is less than 90°.

5. A novel skeleton gasket according to claim 2, wherein The gasket body (11) and the supporting framework (12) are integrally formed, and / or the supporting framework (12) and the limiting fin (13) are integrally formed.

6. An engine comprising a cylinder head (14) and a camshaft housing (15), characterized in that The cylinder head (14) and the camshaft box (15) are provided with the sealing gasket (1) as claimed in any one of claims 1-5.

7. An engine as claimed in claim 6, wherein The diameter D of the sealing part (110) is greater than or equal to 7 mm, and the distance d between the end of the supporting framework (12) located in the gasket body (11) and the center of the sealing part (110) is in the range of (0-1.5)D / 2.

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