CN212154966U - Engine cylinder cover assembly and engine - Google Patents
Engine cylinder cover assembly and engine Download PDFInfo
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- CN212154966U CN212154966U CN202020797141.1U CN202020797141U CN212154966U CN 212154966 U CN212154966 U CN 212154966U CN 202020797141 U CN202020797141 U CN 202020797141U CN 212154966 U CN212154966 U CN 212154966U
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Abstract
The utility model discloses an engine cylinder lid subassembly, include: the cylinder cover is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole form a stepped hole; the spark plug spacer is inserted into the first mounting hole, and one end, close to a fire surface of the cylinder cover, of the spark plug spacer is abutted and sealed with the step end face of the stepped hole; the spark plug penetrates through the spark plug spacer sleeve and is directly connected with the second mounting hole. This engine cylinder head subassembly makes the spark plug directly be connected with the cylinder cap through the assembly relation and the connected mode that change between cylinder cap, spark plug and the spark plug spacer, avoids the spark plug to pass through the spark plug spacer to be connected with the cylinder cap, has increased the cylinder cap wall thickness, has promoted cylinder cap intensity, has reduced the risk of cylinder cap fracture. And one end of the spark plug spacer, which is close to the fire surface of the cylinder cover, is abutted and sealed with the step end surface of the stepped hole, so that the sealing property between the spark plug spacer and the cylinder cover is ensured. The utility model also discloses an engine of including above-mentioned engine cylinder head subassembly.
Description
Technical Field
The utility model relates to an engine device technical field, more specifically say, relate to an engine cylinder lid subassembly. Furthermore, the utility model discloses still relate to an engine including above-mentioned engine cylinder head assembly.
Background
In order to increase the power and torque of an engine, especially a heavy-duty engine, the design value of theoretical detonation pressure of the engine is higher and higher, the theoretical detonation pressure refers to the pressure in the working process of the engine, and the theoretical detonation pressure is usually measured by a detonation pressure meter, for example, the detonation pressure of a diesel engine refers to the pressure in a cylinder in the working cycle (i.e. combustion process) of the diesel engine. The higher the theoretical detonation pressure of the engine, the higher the thermal load on the engine will result.
The cylinder cover of engine is installed on the cylinder body to from upper portion sealed cylinder, and constitute the combustion chamber jointly with the cylinder, consequently, the cylinder cover often contacts with the highly compressed gas of high temperature for the cylinder cover bears very big thermal load and mechanical load, consequently, along with engine theory detonation pressure is higher and higher, makes the risk of cylinder cover fracture also higher and higher, finally leads to the cylinder cover fracture, damages the engine.
In summary, how to provide an engine cylinder head assembly capable of reducing the risk of cracking of the cylinder head is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an engine cylinder head subassembly can reduce the cylinder cap fracture risk.
Another object of the present invention is to provide an engine including the above engine cylinder head assembly, wherein the cylinder head is not easy to crack.
In order to achieve the above object, the present invention provides the following technical solutions:
an engine head assembly comprising:
the cylinder cover is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole form a stepped hole;
the spark plug spacer sleeve is inserted into the first mounting hole, and one end, close to the fire surface of the cylinder cover, of the spark plug spacer sleeve is abutted and sealed with the step end face of the stepped hole;
and the spark plug is arranged in the spark plug spacer sleeve in a penetrating mode and is directly connected with the second mounting hole.
Preferably, one end of the spark plug spacer, which is far away from the fire surface, is in threaded sealing connection with the cylinder cover.
Preferably, the spark plug spacer comprises a first spacer and a second spacer which are axially abutted and sealed, the first spacer is in threaded sealing connection with the cylinder cover, and the second spacer is a copper spacer.
Preferably, the end of the first spacer facing the second spacer is provided with at least one protruding first sealing lip.
Preferably, one end of the second spacer facing the step end face is provided with at least one protruding second sealing lip.
Preferably, one end of the first spacer away from the second spacer is provided with a tool groove for matching with a special tool.
Preferably, a first sealing ring used for achieving engine oil sealing at the top of the cylinder cover is arranged between the first spacer bush and the cylinder cover.
Preferably, a second sealing ring for sealing the upper end of the cooling liquid is arranged between the second spacer bush and the cylinder cover.
Preferably, one side of the cylinder cover facing the fire surface is provided with a sinking groove.
An engine comprises an engine cylinder head assembly, wherein the engine cylinder head assembly is any one of the engine cylinder head assemblies.
The utility model provides an engine cylinder head subassembly through assembly relation and the connected mode between change cylinder cap, spark plug and the spark plug spacer three, makes the spark plug directly be connected with the second mounting hole of cylinder cap, avoids the spark plug to pass through the spark plug spacer to be connected with the cylinder cap to increased the wall thickness of cylinder cap, promoted the intensity of cylinder cap, can reduce the risk of cylinder cap fracture. Meanwhile, one end of the spark plug spacer, which is close to the fire surface of the cylinder cover, is abutted and sealed with the step end face of the stepped hole, so that the sealing performance between the end of the spark plug spacer and the cylinder cover is ensured, and the sealing of the lower end of the cooling liquid is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a cross-sectional view of an engine cylinder head assembly according to an embodiment of the present invention;
FIG. 2 is a partial schematic view of A of FIG. 1;
FIG. 3 is a partial schematic view of B of FIG. 1;
FIG. 4 is a schematic diagram of an engine cylinder head assembly according to an embodiment of the present invention;
fig. 5 is a bottom view of fig. 4.
The reference numerals in fig. 1 to 5 are as follows:
1 is a cylinder cover, 11 is a fire surface, 12 is a sink groove, 2 is a spark plug, 3 is a first spacer, 31 is a first seal lip, 32 is a tool groove, 33 is an external thread, 4 is a second spacer, 41 is a second seal lip, 5 is a first seal ring, 6 is a second seal ring, and 7 is cooling liquid.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, 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 efforts belong to the protection scope of the present invention.
The core of the utility model is to provide an engine cylinder lid subassembly can reduce cylinder lid fracture risk. The utility model discloses an another core provides an engine including above-mentioned engine cylinder head subassembly, and its cylinder head is difficult for the fracture.
Referring to fig. 1-5, fig. 1 is a cross-sectional view of an engine cylinder head assembly according to an embodiment of the present invention; FIG. 2 is a partial schematic view of A of FIG. 1; FIG. 3 is a partial schematic view of B of FIG. 1; FIG. 4 is a schematic diagram of an engine cylinder head assembly according to an embodiment of the present invention; fig. 5 is a bottom view of fig. 4.
The utility model provides an engine cylinder head subassembly mainly includes cylinder cap 1, spark plug 2 and spark plug spacer etc..
Specifically, the cylinder head 1 is provided with a first mounting hole and a second mounting hole, which form a stepped hole.
The spark plug spacer is inserted in the first mounting hole, and one end of the spark plug spacer, which is close to the fire face 11 of the cylinder cover 1, is abutted and sealed with the step end face of the stepped hole.
It is understood that the fire surface 11 refers to an end surface of the cylinder head 1 for forming a combustion chamber with a top portion of a cylinder block of the engine, such as a bottom surface of the cylinder head 1 in fig. 1.
The spark plug spacer is used for sealing cooling liquid 7 in a nose bridge area of the cylinder cover 1, and the cooling liquid 7 flows at high speed in a channel between the spark plug spacer and the cylinder cover 1 so as to reduce the temperature of the spark plug spacer and the cylinder cover 1.
The spark plug 2 is arranged in the spark plug spacer sleeve in a penetrating way and is directly connected with the second mounting hole.
Preferably, the second mounting hole is a threaded hole, and the spark plug 2 is directly screwed with the threaded hole.
It is known in the prior art that a spark plug spacer is used as a mounting base for the spark plug 2, the spark plug 2 is screwed with the spark plug spacer, the spark plug spacer is screwed with the cylinder head 1, that is, the spark plug 2 is screwed on the spark plug spacer, the spark plug spacer is screwed on the cylinder head 1, and the spark plug 2 is indirectly connected with the cylinder head 1 through the spark plug spacer.
It can be seen that, in the above connection mode in the prior art, the cylinder head 1 needs to be provided with a threaded hole for being in threaded connection with the spark plug spacer, and the outer diameter of the spark plug spacer is obviously larger than that of the spark plug 2, so that the wall thickness of the cylinder head 1 is reduced by the threaded hole for being in threaded connection with the spark plug spacer, the strength of the cylinder head 1 is reduced, and the cylinder head 1 is easy to crack.
That is to say, the utility model provides an engine cylinder head subassembly makes spark plug 2 directly be connected with the second mounting hole of cylinder cap 1 through changing assembly relation and connected mode between cylinder cap 1, spark plug 2 and the spark plug spacer three, avoids spark plug 2 to be connected with cylinder cap 1 through the spark plug spacer to increased the wall thickness of cylinder cap 1, promoted the intensity of cylinder cap 1, can reduce the risk of 1 ftractures of cylinder cap. Meanwhile, one end of the spark plug spacer, which is close to the fire surface 11 of the cylinder cover 1, is abutted and sealed with the step end surface of the stepped hole, so that the sealing performance between the end of the spark plug spacer and the cylinder cover 1 is ensured, and the sealing of the lower end of the cooling liquid 7 is realized.
In view of the tightness of the connection of the spark plug spacer to the cylinder head 1, on the basis of the above-described embodiment, the end of the spark plug spacer remote from the combustion surface 11 of the cylinder head 1 is screwed into the cylinder head 1 in a sealing manner.
That is, the end of the spark plug spacer, which is far away from the fire surface 11 of the cylinder head 1, is provided with an external thread 33, the spark plug spacer is screwed on the cylinder head 1 through the external thread 33, and after the spark plug spacer is screwed, the end of the spark plug spacer, which is close to the fire surface 11 of the cylinder head 1, applies extrusion force to the step end surface of the step hole, so that the abutting and sealing of the spark plug spacer and the step end surface are ensured.
As can be seen from the above description, in the prior art, the spark plug spacer is screwed to the cylinder head 1 by means of the end of the spark plug spacer close to the fire surface 11 of the cylinder head 1, that is, the spark plug spacer is screwed to the cylinder head 1 by means of the screw thread and the screw thread sealant, so as to achieve the connection and sealing between the spark plug spacer and the cylinder head 1. However, since the screw thread sealing compound is close to the fire surface 11, the operating temperature is high, which easily causes the sealing failure, and the coolant 7 flows into the combustion chamber.
It can be seen that in the present embodiment, the end of the spark plug spacer away from the fire surface 11 of the cylinder head 1 is in threaded sealing connection with the cylinder head 1, so that the threaded position of the spark plug spacer is away from the fire surface 11, thereby avoiding the screwing failure of the spark plug spacer due to high temperature, and ensuring the sealing performance between the end of the spark plug spacer away from the fire surface 11 and the cylinder head 1.
In order to improve the heat conducting performance of the spark plug spacer, on the basis of the above embodiment, the spark plug spacer comprises a first spacer 3 and a second spacer 4 which are axially abutted and sealed, the first spacer 3 is in threaded sealing connection with the cylinder head 1, obviously, the second spacer 4 is closer to the fire surface 11 of the cylinder head 1, and one end of the second spacer 4 is abutted and sealed with the step end surface of the stepped hole; more importantly, the second spacer 4 is a copper spacer.
That is, in the present embodiment, the material selection of the second spacer 4 close to the combustion surface 11 of the cylinder head 1 is made more flexible by providing the spark plug spacer as two separate shaft sleeves, i.e., the first spacer 3 and the second spacer 4.
It can be understood that the second spacer 4 is a copper spacer, which has strong heat conductivity, and is more beneficial to cooling the cylinder head 1, and further reduces the risk of cracking the cylinder head 1.
Preferably, the first spacer 3 is a stainless steel spacer.
After the first spacer 3 is screwed down, the axial force is transmitted to the second spacer 4 through the first spacer 3, so that the second spacer 4 presses the step end face of the stepped hole, and the abutting and sealing between the first spacer and the second spacer are realized.
In order to improve the sealing at the axial abutment of the first spacer 3 and the second spacer 4, on the basis of the above-described embodiment, the end of the first spacer 3 facing the second spacer 4 is provided with at least one projecting first sealing lip 31.
That is to say, the first spacer 3 is screwed tightly to extrude the second spacer 4, and the first sealing lip 31 protruding from the end face of the first spacer 3 forces the top of the copper second spacer 4 to deform under the action of the extrusion force, so that the second spacer 4 is tightly attached to the first sealing lip 31, and the sealing between the first spacer 3 and the second spacer 4 is realized.
Preferably, the first sealing lip 31 is triangular in cross-section.
In order to improve the sealing of the second cup 4 and the cylinder head 1, on the basis of the above-described embodiment, the end of the second cup 4 facing the stepped end face is provided with at least one projecting second sealing lip 41.
It can be understood that the second spacer 4 is slightly deformed under the action of the pressing force of the second sealing lip 41 under the action of the axial force transmission of the first spacer 3, so that the second spacer 4 is tightly attached to the cylinder head 1, and the lower end of the cooling liquid 7 is sealed.
Preferably, the second sealing lip 41 is triangular in cross-section.
It should be noted that the present invention does not specifically limit the number of the first sealing lip 31 and the second sealing lip 41, for example, the number of the first sealing lip 31 along the radial direction of the first spacer 3 is one; the number of second sealing lips 41 in the radial direction of the second spacer 4 is two.
It is understood that the first seal lip 31 and the second seal lip 41 are each a circular ring structure, and are continuous in the circumferential direction of the spark plug spacer to ensure sealability.
In order to facilitate the threaded connection of the first spacer 3 to the cylinder head 1, on the basis of the above-described embodiment, the end of the first spacer 3 remote from the second spacer 4 is provided with a tool groove 32 for cooperating with a special tool.
Preferably, the tool groove 32 comprises four grooves evenly distributed along the circumferential side wall of the first spacer 3.
During assembly, the first spacer 3 is screwed to the cylinder head 1 by a special tool in cooperation with the tool groove 32.
In addition, in the above embodiment, a first seal ring 5 is provided between the first spacer 3 and the cylinder head 1 to seal the engine oil on the top of the cylinder head 1.
Further, in addition to the above-described embodiments, a second gasket 6 is provided between the second spacer 4 and the cylinder head 1 to seal the upper end of the coolant 7.
Preferably, the first seal ring 5 and the second seal ring 6 are both O-rings.
In addition to the above embodiments, the cylinder head 1 is provided with a sink 12 on the side facing the combustion surface 11 in order to enhance the thermal conductivity of the cylinder head 1.
That is to say, this embodiment sets up heavy groove 12 in the region between the valve on cylinder cap 1, through the mode that increases heavy groove 12, reduces cylinder cap 1's thickness, is favorable to the heat conduction, can effectually reduce the stress concentration in valve nose bridge district simultaneously, further reduces the risk that cylinder cap 1 ftractures.
In addition to the engine cylinder head assembly, the present invention further provides an engine including the engine cylinder head assembly disclosed in the above embodiments, and the structure of other parts of the engine refers to the prior art, which is not described herein again.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In addition, the terms "lower end", "bottom surface", "top portion", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides an engine cylinder lid subassembly and engine have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. An engine cylinder head assembly, comprising:
the cylinder cover (1), the cylinder cover (1) is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole form a stepped hole;
the spark plug spacer is inserted into the first mounting hole, and one end, close to a fire surface (11) of the cylinder cover (1), of the spark plug spacer is abutted and sealed with the step end face of the stepped hole;
the spark plug (2) penetrates through the spark plug spacer sleeve, and the spark plug (2) is directly connected with the second mounting hole.
2. An engine head assembly according to claim 1, characterized in that the end of the spark plug boss remote from the flame surface (11) is in threaded sealing connection with the cylinder head (1).
3. An engine head assembly according to claim 2, characterized in that the spark plug spacer comprises a first spacer (3) and a second spacer (4) axially abutting against the seal, the first spacer (3) being in threaded sealing connection with the cylinder head (1), the second spacer (4) being a copper spacer.
4. An engine head assembly according to claim 3, characterized in that the end of the first cup (3) facing the second cup (4) is provided with at least one protruding first sealing lip (31).
5. An engine head assembly according to claim 3, characterized in that the end of the second cup (4) facing the step end face is provided with at least one protruding second sealing lip (41).
6. An engine head assembly according to claim 3, characterised in that the end of the first distance piece (3) remote from the second distance piece (4) is provided with a tool groove (32) for cooperation with a special tool.
7. The engine cylinder head assembly according to claim 3, characterized in that a first sealing ring (5) for oil sealing at the top of the cylinder head (1) is arranged between the first spacer (3) and the cylinder head (1).
8. An engine cover assembly according to claim 3, characterized in that a second sealing ring (6) for sealing the upper end of the cooling liquid (7) is provided between the second spacer (4) and the cylinder head (1).
9. Engine head assembly according to any of claims 1-8, characterized in that the side of the head (1) facing the fire surface (11) is provided with a sink (12).
10. An engine comprising an engine head assembly, wherein the engine head assembly is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020797141.1U CN212154966U (en) | 2020-05-13 | 2020-05-13 | Engine cylinder cover assembly and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020797141.1U CN212154966U (en) | 2020-05-13 | 2020-05-13 | Engine cylinder cover assembly and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212154966U true CN212154966U (en) | 2020-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020797141.1U Active CN212154966U (en) | 2020-05-13 | 2020-05-13 | Engine cylinder cover assembly and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212154966U (en) |
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2020
- 2020-05-13 CN CN202020797141.1U patent/CN212154966U/en active Active
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