Bowl-shaped plug and engine

[0036]In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0037]Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. Those skilled in the art can adjust it as needed to adapt to specific applications.

[0038]It should be noted that in the description of the present invention, the terms "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for ease of description, not It indicates or implies that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0039]It should also be noted that, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrally connected; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present invention can be understood according to specific circumstances.

[0040]The bowl plug in the prior art is processed with a groove in the middle of the bowl plug, and the groove is filled with vulcanized rubber. When the bowl plug is installed on the engine, the vulcanized rubber in the middle of the bowl plug and the engine block or cylinder head The inner wall of the plug hole abuts to provide a seal. However, the bowl-shaped plug is generally a thin-walled piece. When grooves are processed on the side wall of the bowl-shaped plug and filled with vulcanized rubber, the structural strength of the bowl-shaped plug itself is reduced accordingly. The bowl plug is usually set on the plug hole of the engine. When the engine is running, it will vibrate and be accompanied by thermal shock, high pressure, etc. The structural strength of the bowl plug is not strong enough to easily cause insufficient tightening force, and the bowl plug will fall out, causing serious problems. The root of the groove is broken. In addition, the rubber is sealed in the middle groove of the bowl plug. When assembling, a certain impact force is required to press the bowl plug into the plug hole. Under the action of the impact force, the rubber part in the middle of the bowl plug passes through the plug hole. It is easy to cut the rubber slope, causing failure.

[0041]If a new bowl-shaped plug can be designed, rubber and other elastic parts are arranged on the bottom side of the bowl-shaped plug, while ensuring the structural strength of the bowl-shaped plug body, it can also block the highly corrosive media in the engine. Avoid corrosion of the bowl-shaped plug body, while also providing better sealing.

[0042]Based on this, the present invention provides a bowl-shaped plug and an engine. The bowl-shaped plug is stamped to form a stepped body. The bottom of the bowl-shaped plug has an interference fit elastic body, which ensures the overall structural strength of the bowl-shaped plug and provides more Good sealing and corrosion resistance.

[0043]figure 1 Is a schematic structural diagram of a bowl-shaped plug provided by an embodiment of the present invention;figure 2 This is an exploded view of a bowl-shaped plug provided by an embodiment of the present invention;image 3 Is a cross-sectional view of a bowl-shaped plug provided by an embodiment of the present invention;Figure 4 forimage 3 Enlarged view of middle A;Figure 5 It is an assembly drawing of a bowl plug and an engine provided by an embodiment of the present invention. Such asFigure 1-5As shown, this embodiment provides a bowl-shaped plug 1 for sealing the plug hole 3 of the engine body or cylinder head. The bowl-shaped plug 1 includes a bowl-shaped plug base 10 and an elastic body 20. The bowl-shaped plug base 10 The first end has an opening 11, a cavity 12 is formed inside the bowl-shaped plug base 10, the opening 11 is in communication with the cavity 12, and the elastic body 20 is disposed on the bowl-shaped plug base 10 at the second end away from the opening 11.

[0044]Wherein, the bowl-shaped plug 1 is arranged in contact with the plug hole 3 of the engine body or cylinder head, and the bowl-shaped plug 1 is interference-connected when the plug hole 3 is connected, so that the bowl plug 1 and the plug hole 3 are fixed. In general, the bowl-shaped plug 1 is configured with an opening 11 at the first end and a bowl-shaped structure with a flat bottom at the second end. In this embodiment, the bowl-shaped plug base 10 is the main body of the bowl-shaped plug 1. The first end of the bowl-shaped plug base 10 has an opening 11, and a cavity 12 is formed inside the bowl-shaped plug base 10, the opening 11 and the cavity 12 Connected. An elastic body 20 is provided at the second end of the bowl-shaped plug base 10 (that is, the flat end of the bowl-shaped plug base opposite to the opening 11), and the elastic body 20 is attached to the lower side of the plug hole 3 of the engine body or cylinder head during installation. Abut to provide a seal.

[0045]Wherein, the diameter of the opening 11 can be set to be smaller than the overall diameter of the upper part of the bowl-shaped plug 1, that is, the opening 11 is an opening on the upper surface of the bowl-shaped plug 1, or the size of the opening 11 can also be set to be the same as that of the bowl-shaped plug 1. The diameter of the top of 1 is equal, that is, the diameter of the opening 11 is the maximum diameter of the bowl plug 1. It should be noted that when the bowl-shaped plug 1 is connected to the plug hole 3 of the engine body or cylinder head, the pressure at the connection is too large, and often has thermal shock and vibration, which has a high structural strength of the bowl-shaped plug 1. Claim. In order to improve the overall structural strength of the bowl-shaped plug 1, the diameter of the opening 11 is set to the maximum diameter of the bowl-shaped plug 1, and the opening 11 is horizontally opened on the upper part of the bowl-shaped plug 1. The arc-shaped opening can well ensure the opening 11 The force is evenly applied to enhance the structural strength of the bowl plug 1, which is not limited in this embodiment.

[0046]Among them, the elastic body 20 is provided at the bottom of the bowl plug 1. When the bowl plug 1 is connected to the plug hole 3, the bowl plug 1 is manually inserted into the plug hole 3, and the elastic body of the bowl plug 1 The 20 part is pressed into the plug hole 3 first, and after the elastic body 20 has completely entered the plug hole 3, the bowl plug 1 is pressed into the plug hole 3 as a whole through pressure tools such as hydraulic fixtures. At this time, the elastic body 20 at the bottom of the bowl plug 1 abuts against the bottom of the plug hole 3 to produce extrusion, and the entire elastic body 20 is squeezed and stretched to wrap around the connection between the bowl plug base 10 and the plug hole 3, thereby forming a seal In addition, the selection of the bowl plug 1 is generally slightly larger than the diameter of the plug hole 3, so that the bowl plug 1 is pressed into the plug hole 3 and has an interference fit with the opening of the plug hole 3, thereby achieving a bowl plug 1 Fixing with plug hole 3. Among them, the elastic body 20 is arranged between the bowl plug 1 and the plug hole 3. At this time, the elastic body 20 can block the medium in the plug hole 3 to prevent highly corrosive media from contacting the bowl plug base 10 and avoid crevice corrosion, etc. Corrosion problem.

[0047]This embodiment provides a bowl-shaped plug 1, including a bowl-shaped plug base 10 and an elastic body 20. The elastic body 20 is provided at the bottom of the bowl-shaped plug base 10, and the bowl plug 1 is connected to the plug hole 3 of the engine body or cylinder head. Connected, the elastic body 20 is located at the junction of the bowl-shaped plug base 10 and the plug hole 3, and the elastic body 20 can wrap the bottom of the entire bowl-shaped plug base 10 when deformed, which improves the sealing performance and also provides a certain buffer, Moreover, since the elastic body 20 wraps the entire bottom of the bowl-shaped plug base 10, the elastic body 20 can also block the medium in the plug hole 3, avoiding corrosion caused by the contact between the medium and the bowl-shaped plug base 10, and eliminating the bowl while ensuring the sealing performance. Corrosion of the plug matrix 1.

[0048]Various possible structures and implementations of the bowl-shaped plug 1 are specifically introduced below.

[0049]Optionally, the cavity 12 includes a first cavity 121 and a second cavity 122, the first cavity 121 and the second cavity 122 are in communication, the first cavity 121 is in communication with the opening 11, and the first cavity 121 is located Between the opening 11 and the second cavity 122; the inner diameter of the bowl-shaped plug base 10 corresponding to the second cavity 122 is smaller than the inner diameter of the bowl-shaped plug base 10 corresponding to the first cavity 121.

[0050]The cavity 12 is divided into a first cavity 121 and a second cavity 122, and the first cavity 121 and the second cavity 122 are in communication, and the first cavity 121 is also in communication with the opening 11. It can be understood that the A cavity 121 is arranged at the upper part of the cavity 12 of the bowl plug 1, and a second cavity 122 is arranged on the side near the bottom of the lower part of the cavity 12 of the bowl plug 1, and the first cavity 121 and the second cavity 122 All are cylindrical cavities. The inner diameter of the bowl-shaped plug base 10 corresponding to the second cavity 122 is smaller than the inner diameter of the bowl-shaped plug base 10 corresponding to the first cavity 121, that is, the inside of the bowl-shaped plug base 10 is divided into upper and lower parts. The diameter of one cavity 121 is larger than the diameter of the second cavity 122, and the first cavity 121 and the second cavity 122 are coaxially arranged.

[0051]It can be understood that the inner diameter of the bowl-shaped plug base 10 corresponding to the second cavity 122 is smaller than the inner diameter of the bowl-shaped plug base 10 corresponding to the first cavity 121, that is, the junction between the second cavity 122 and the first cavity 121 is formed The step surface 13 is a flat surface.

[0052]Optionally, the outer diameter of the bowl-shaped plug base 10 corresponding to the first cavity 121 is larger than the outer diameter of the bowl-shaped plug base 10 corresponding to the second cavity 122.

[0053]The outer diameter of the bowl-shaped plug base 10 corresponding to the first cavity 121 is larger than the outer diameter of the bowl-shaped plug base 10 corresponding to the second cavity 122, that is, the outer surface of the bowl-shaped plug base 10 is also divided into two sections. The outer diameter of the bowl-shaped plug base 10 with the surface 13 upwards is greater than the outer diameter of the bowl-shaped plug base 10 with the stepped surface 13 downwards, and the stepped surface 13 is also formed as an outer stepped surface 14 at a corresponding position on the outside of the bowl-shaped plug base 10. When connecting the bowl plug 1 with the plug hole 3, the bowl plug 1 with the outer step surface 14 can be better connected with the plug hole 3, and at the same time, more elastic body 20 can be filled in the position of the outer step surface 14, thereby Provides better sealing performance, which is not limited in this embodiment.

[0054]It should be noted that in this embodiment, the inner diameter of the bowl-shaped plug base 10 corresponding to the second cavity 122 is smaller than the inner diameter of the bowl-shaped plug base 10 corresponding to the first cavity 121, and the bowl-shaped plug base 10 corresponding to the first cavity 121 The outer diameter of the plug base 10 is greater than the outer diameter of the second cavity 122 corresponding to the bowl-shaped plug base 10, wherein the bowl-shaped plug base 10 has the same wall thickness at the first cavity 121 as the bowl-shaped plug base 10 in the second cavity. The corresponding wall thicknesses at 122 can be set to be the same, so as to ensure that the bowl-shaped plug 1 is uniformly stressed, and it is more convenient to make the bowl-shaped plug, which is not limited in this embodiment.

[0055]Optionally, the bowl-shaped plug base 10 is formed by a stamping process, which can better ensure that the wall thickness of the bowl-shaped plug base 10 in the circumferential direction is consistent, thereby improving the overall strength of the bowl-shaped plug 1. When the hole 3 is connected, the holding force formed between the bowl-shaped plug 1 and the plug hole 3 is greater, more stable, and not easy to fall off. In addition, the bowl-shaped plug base body 10 can be better formed into a stepped shape by the punching process, which has better realizability and easier commercialization.

[0056]When the bowl plug 1 is connected to the plug hole 3, the elastic member 20 will deform due to extrusion. When there are fewer elastic members 20, or when the material deformability of the elastic members 20 is poor, the elastic members 20 may not completely cover the bottom of the bowl-shaped plug base 10 when deformed. Optionally, the elastic member 20 covers the second end of the bowl-shaped plug base 10 and extends to the outer side wall of the bowl-shaped plug base 10 corresponding to the second cavity 122.

[0057]Wherein, the elastic member 20 covers the second end of the bowl-shaped plug base 10, and the elastic member 20 extends to the outer side wall of the bowl-shaped plug base 10 corresponding to the second cavity 122, that is, the elastic member is covering the bottom of the bowl-shaped plug base 10. At the same time as the end, the elastic member 20 is also filled at the outer step surface 14, which can better ensure the sealing performance of the bowl plug 1 and the plug hole 3, and completely block the medium from the bowl plug base 10 to avoid corrosion. .

[0058]Optionally, the outer side wall of the elastic member 20 is flush with the outer side wall of the bowl-shaped plug base 10 corresponding to the first cavity 121.

[0059]Wherein, the elastic member 20 is completely filled at the second end of the bowl-shaped plug base 10, and the elastic member 20 is completely filled with the outer step surface 14 until the outer side wall of the elastic member 20 corresponds to the bowl-shaped plug base 10 of the first cavity 121 The outer side wall is flush, that is, the outer diameter of the elastic member 20 is the same as the outer diameter of the upper part of the bowl-shaped plug base 10, which can provide better sealing when connecting the bowl-shaped plug 1 and the plug hole 3, and provide the outer step surface 14 Better protection.

[0060]Optionally, the outer side wall of the elastic member 20 has at least one ring of ribs 21 extending toward the outside of the elastic member.

[0061]Wherein, the outer side wall of the elastic member 20 has at least one ring of ribs 21. When the bowl-shaped plug 1 is connected to the plug hole 3, the at least one ring of ribs 21 on the outer side wall of the elastic member 20 directly abuts against the side wall of the plug hole 3. Then, since the elastic member 20 is elastic and squeezed by the side wall of the plug hole 3, when the elastic member 20 deforms, the gap between the elastic member 20 and the side wall of the plug hole 3 can be completely filled, thereby providing better sealing ; In addition, at least one ring of ribs 21 also provides greater friction for the bowl plug 1 to avoid leakage caused by the bowl plug 1 being loose under high pressure, thermal shock, and vibration.

[0062]Optionally, the elastic body 20 and the bowl-shaped plug base 10 are fixedly connected by a vulcanization process. Among them, the elastic body 20 and the bowl-shaped plug base 10 are fixedly connected by a vulcanization process, which avoids the unstable connection of other connection methods or the generation of gaps in the connection, which can provide a better fixing effect, and is more suitable for the bowl-shaped plug 1. Working environment.

[0063]When assembling the existing bowl-shaped plug, interference appears at the bottom, and a certain impact force is required to press in the bowl-shaped plug. Under the action of the impact force, when the rubber part of the bowl-shaped plug passes through the hollow of the bottom hole, it is easy to remove the rubber. Cut the slope, causing failure. Optionally, the elastomer 20 is a fluororubber elastomer or a nitrile rubber elastomer. The fluororubber elastomer or nitrile rubber elastomer has higher strength and can provide better heat resistance, oxidation resistance, and oil resistance. In addition to corrosion resistance, when the elastomer 20 is placed under the bowl-shaped plug base 10, the assembly process is better, the problem of rubber being cut is less likely to occur, and the sealing reliability is higher.

[0064]The present invention also provides an engine 2. The engine 2 includes a body, a cylinder head, and the aforementioned bowl plug 1. At least one plug hole 33 is opened on the body or cylinder head, and the bowl plug 1 is inserted into the plug hole 33, In addition, the elastic body 20 of the bowl plug 1 is assembled with the inner wall of the plug hole 33 by interference fit, so as to provide the plug hole 33 with better sealing performance. It can be understood that the basic functional elements and working principles constituting the engine are basically the same as those in the prior art, and those skilled in the art can fully implement them based on the prior art, so they will not be repeated here.

[0065]Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. range.