CN218717155U - Engine cylinder cover assembly - Google Patents

Abstract

The application provides an engine cylinder cover subassembly, including cylinder cover body, the check valve, the appearance chamber of air supply pipe and holding air supply pipe, the air supply pipe has entry end and exit end along the air current direction, be provided with gas circuit passageway and installation passageway in the air supply pipe, the gas circuit passageway extends to the exit end from the entry end, the installation passageway extends to the entry end from the exit end, and with gas circuit passageway intercommunication, the internal diameter of installation passageway is greater than the internal diameter of gas circuit passageway, have the installation position that is used for installing the check valve in the installation passageway. The installation channel is internally provided with the installation position for assembling the one-way valve, so that the one-way valve can be directly assembled at the outlet end of the air supply pipe, the assembly and the disassembly of the one-way valve are convenient, the one-way valve does not need to pass through a longer air supply pipe, and the installation efficiency can be improved; and the internal diameter that sets up the installation passageway itself is greater than the internal diameter of gas circuit passageway, can play certain positioning action to the position of check valve, prevents that the check valve from extending the slippage in to the gas circuit passageway.

Description

Engine cylinder cover assembly

Technical Field

The application relates to the field of engine equipment, in particular to an engine cylinder cover assembly.

Background

Most spark-ignition engines on the market comprise a cylinder body and a cylinder cover assembly connected to the cylinder body, a main combustion chamber is arranged in the cylinder body, a pre-combustion chamber communicated with the main combustion chamber is arranged in the cylinder cover assembly, and in the normal working process of the engine, gas is firstly ignited in the pre-combustion chamber and then enters the main combustion chamber from the pre-combustion chamber to be mixed with a large amount of mixed gas and then continues to combust.

To the structure of cylinder cap subassembly, mostly include cylinder cap body, prechamber body, spark plug and air supply pipe among the prior art, wherein, in order to prevent that gas from appearing the adverse current phenomenon for gas moves along the direction of admitting air all the time when getting into the prechamber, needs set up the check valve in the air supply line and restrict gaseous direction of motion.

Among the prior art, generally set up the air supply pipe into the structure that the inlet end internal diameter is greater than the end internal diameter of giving vent to anger, when the installation check valve, insert the check valve in the air supply pipe and install near the end of giving vent to anger always by the inlet end of air supply pipe, this kind of setting up mode can install the check valve in the darker position department of air supply pipe, but the installation route of check valve is longer, and the assembly degree of difficulty is big to at the in-process of periodic maintenance, the check valve is difficult to dismantle, is not convenient for maintain and change.

Thus, the prior art is subject to further improvements and enhancements.

Disclosure of Invention

The application provides an engine cylinder lid subassembly to solve prior art check valve installation difficulty, the assembly compactness is poor, and it is inconvenient to dismantle, is difficult to carry out the problem of periodic inspection and change.

The technical scheme adopted by the application is as follows:

the application provides an engine cylinder cover subassembly, including cylinder cap body, the check valve, the appearance chamber of air supply pipe and holding air supply pipe, the air supply pipe has entry end and exit end along the air current direction, be provided with gas circuit passageway and installation passageway in the air supply pipe, the gas circuit passageway extends to the exit end from the entry end, the installation passageway extends to the entry end from the exit end, and with gas circuit passageway intercommunication, the internal diameter of installation passageway is greater than the internal diameter of gas circuit passageway, have the installation position that is used for installing the check valve in the installation passageway.

As a preferred embodiment of the present application, the check valve is inserted into the installation channel from the outlet end, and the check valve is in interference fit with the inner wall of the installation channel.

As a preferred embodiment of the application, the joint of the installation channel and the air channel is provided with a butting part, and the butting part is butted with the one-way valve.

As a preferred embodiment of the present application, an inner wall of the installation passage is provided with a first positioning portion, and an outer wall of the check valve is provided with a second positioning portion engaged with the first positioning portion to restrict axial movement of the check valve along the gas supply pipe.

As a preferred embodiment of the present application, one of the first positioning portion and the second positioning portion is a positioning protrusion, and the other of the first positioning portion and the second positioning portion is a positioning groove, the first positioning portion surrounds the inner wall of the installation channel, and the second positioning portion surrounds the outer wall of the check valve; alternatively, the first and second electrodes may be,

first location portion is a plurality of, and sets up along the circumference interval of installation passageway, and second location portion and first location portion one-to-one set up.

As a preferred embodiment of this application, the check valve includes shell and valve body, and the shell has the passageway that overflows, and the valve body sets up in the passageway that overflows, and the passageway that overflows has the operation end towards the exit end, and the inner wall of operation end is equipped with fixed knot and constructs.

As a preferred embodiment of the present application, the outer wall of the outlet end is provided with a guide slope.

As a preferred embodiment of the present application, a positioning protrusion protruding out of the outer wall of the gas supply pipe is provided between the inlet end and the outlet end, and a stopping portion capable of abutting against the positioning protrusion is provided on the inner wall of the cavity.

As a preferred embodiment of the application, the engine cylinder cover assembly further comprises a sealing element, the positioning bulge or the inner wall of the containing cavity is provided with a containing groove for containing the sealing element, and the sealing element is respectively abutted against the inner wall of the containing cavity and the positioning bulge.

As a preferred embodiment of the present application, the engine head assembly further includes a spark plug and a pre-chamber, the spark plug and the outlet end communicating with the pre-chamber, respectively.

Due to the adoption of the technical scheme, the technical effects obtained by the application are as follows:

1. the air supply pipe is provided with the air path channel and the installation channel respectively, the air path channel extends from the inlet end to the outlet end, and the installation channel extends from the outlet end to the inlet end, so that the air supply pipe can be divided into a part for conveying air and a part for installing the one-way valve on the premise of ensuring the mutual communication of the air path channel and the installation channel, the air can be normally conveyed to the installation channel from the air path channel; and the internal diameter that sets up the installation passageway itself is greater than the internal diameter of gas circuit passageway, can play limiting displacement to the check valve, prevents to a certain extent that the check valve from when installing to the installation passageway, and the check valve slides in to the gas circuit passageway, can play certain positioning action to the position of check valve.

2. As a preferred embodiment of the present application, the installation distance can be shortened by arranging the check valve to be inserted into the installation channel from the outlet end, so that the assembly between the check valve and the air supply pipe is more convenient; in addition, because the check valve is directly inserted into the installation channel from the outlet end, when the air supply pipe is processed, only part of the area of the outlet end needs to be processed, the installation of the check valve can be met, and the processing cost can be saved; in addition, adopt interference fit between the inner wall of check valve and installation passageway, to a great extent prevents droing of check valve, can further improve the assembly compactness between check valve and the installation passageway, improves the reliability between check valve and the installation passageway.

3. As a preferred embodiment of the application, the application sets one of the first positioning part and the second positioning part as a positioning protrusion, the other one of the first positioning part and the second positioning part is a positioning groove, and the first positioning part and the second positioning part surround the inner wall of the installation channel and the outer wall of the one-way valve respectively, so that the axial movement of the one-way valve in the air supply pipe can be limited under the matching of the first positioning part and the second positioning part, the one-way valve is axially positioned, and the one-way valve is prevented from falling off from the installation channel to a great extent.

In addition, this application also can set up first location portion for a plurality ofly to along the circumference interval setting of installation passageway, second location portion sets up with first location portion one-to-one, can restrict the axial motion and the circumferential direction of check valve simultaneously under the cooperation of first location portion and second location portion, not only can prevent to a great extent that the check valve from droing from the installation passageway, can also the check valve rotate, in order to further improve the tightness of being connected of check valve and installation passageway.

4. As a preferred embodiment of this application, this application is provided with the operation end towards the exit end through the shell department that sets up the check valve, can come to cooperate the fixing device of operation end department through external instrument when dismantling the check valve, comes to dismantle the check valve, can simplify dismantlement work, improves dismouting efficiency.

5. As an optimal implementation mode of this application, this application can play the guide effect through the guide inclined plane when the air supply pipe is assembled to holding the chamber through setting up the guide inclined plane at the exit end, prevents to a great extent that the air supply pipe from colliding with holding the intracavity wall when inserting, prevents that the air supply pipe from colliding with holding the intracavity wall and causing the damage for the insertion of air supply pipe is more smooth.

6. As an preferred embodiment of this application, it is protruding that this application has the location through setting up entry end and exit end to be provided with the backstop portion with the protruding butt of location in holding intracavity wall, play the effect of warning that targets in place through backstop effect between them, can prevent to a great extent that the air supply pipe from inserting the degree of depth too deeply, cause the damage to the cylinder cap body. And, because the diameter of location arch department is bigger than other positions in the air supply pipe, this application sets up the storage tank in location arch department, can avoid slotting on the pipe wall to a certain extent to cause the influence to rigidity to can be provided with the sealing washer in the seal groove, can avoid gas to leak to a great extent, improve the sealing performance between air supply pipe and the appearance chamber, improve the inseparable degree of cylinder subassembly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram illustrating an overall structure of an engine cylinder head assembly according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a check valve according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a gas supply pipe according to an embodiment of the present disclosure.

Reference numerals:

1-a cylinder cover body;

2-a one-way valve; 21-a flow-through channel; 22-an operation end;

3-a gas supply pipe; 31-an inlet end; 32-an outlet end; 33-gas path channel; 34-mounting a channel; 35-a mounting location; 36-a top abutment; 37-a guide ramp;

4-a cavity; 41-positioning protrusions; 42-a stop portion; 43-a receiving groove; 44-sealing ring; 45-locking element;

5-a spark plug;

6-precombustion chamber.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "bottom", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 3, the present application provides an engine cylinder head assembly, including cylinder head body 1, check valve 2, the appearance chamber 4 of air supply pipe 3 and holding air supply pipe 3, air supply pipe 3 has entry end 31 and exit end 32 along the air current direction, be provided with gas circuit passageway 33 and installation passageway 34 in the air supply pipe 3, gas circuit passageway 33 extends to exit end 32 from entry end 31, installation passageway 34 extends to entry end 31 from exit end 32, and communicate with gas circuit passageway 33, the internal diameter of installation passageway 34 is greater than the internal diameter of gas circuit passageway 33, there is the installation position 35 that is used for installing check valve 2 in the installation passageway 34.

It can be understood that, in the present application, the gas supply pipe 3 is provided with the gas path channel 33 and the installation channel 34 respectively, the gas path channel 33 extends from the inlet end 31 to the outlet end 32, and the installation channel 34 extends from the outlet end 32 to the inlet end 31, so that the gas supply pipe 3 can be divided into a part for conveying gas and a part for installing the check valve 2 on the premise of ensuring the mutual communication between the gas path channel 33 and the installation channel 34, so that the gas can be normally conveyed from the gas path channel 33 to the installation channel 34.

Compared with the arrangement mode that the check valve is arranged from the air inlet end to the outlet end in the prior art, the installation path of the check valve is greatly shortened, and the installation efficiency can be improved; and the internal diameter that sets up the installation passageway itself is greater than the internal diameter of gas circuit passageway, can play limiting displacement to the check valve, prevents to a certain extent that the check valve from when installing to the installation passageway, and the check valve slides in to the gas circuit passageway, can play certain positioning action to the position of check valve.

As shown in fig. 1, the installation channel 34 is provided with the installation position 35 to assemble the check valve 2, so that the check valve 2 can be directly assembled at the outlet end 32 of the air supply pipe 3, and the check valve 2 can be assembled and disassembled conveniently, compared with the prior art in which the check valve 2 is installed from the inlet end 32 to the outlet end 33, the installation mode of the present application does not require the check valve 2 to pass through a longer air supply pipe 3, and the installation efficiency can be improved; and the internal diameter that sets up installation passageway 34 itself is greater than the internal diameter of gas circuit passageway 33, can play certain spacing effect to check valve 2, prevents to a certain extent that check valve 2 from when installing to installation passageway 34, and check valve 2 slides in to gas circuit passageway 33, can play certain positioning action to the position of check valve 2.

Further, as shown in fig. 1, the engine head assembly further comprises a spark plug 5 and a pre-combustion chamber 6, wherein the spark plug 5 and the outlet end 32 are respectively communicated with the pre-combustion chamber 6 so as to provide sufficient gas into the pre-combustion chamber 6 through the cooperation of the one-way valve 2 and the gas supply pipe 3, and the gas is ignited through the spark plug 5 to complete the pre-combustion work.

Wherein, the clearance has between the entry end 32 of air supply pipe 3 and the appearance chamber 4, can be convenient for insert of air supply pipe 3, and engine cylinder head subassembly can also include locking piece 45, and locking piece 45 can peg graft with the clearance to lock air supply pipe 3, to a great extent prevents at engine operation in-process, and air supply pipe 3 and appearance chamber take place to slide between 4, improves engine cylinder head subassembly's connection reliability.

As a preferred embodiment of the present application, the check valve 2 is inserted into the mounting channel 34 from the outlet end 32, and the check valve 2 is interference-fitted with the inner wall of the mounting channel 34.

It should be noted that, the check valve 2 can be inserted into the installation channel 34 from the outlet end 32, compared to the prior art in which the check valve 2 is installed from the inlet end 31 to the outlet end 32 of the air supply pipe 3, the installation distance can be greatly shortened, so that the assembly between the check valve 2 and the air supply pipe 3 is more convenient.

In addition, the installation channel 34 can be directly processed from the outlet end 32 of the air supply pipe 3 when the air supply pipe 3 is processed, so that the processing cost can be saved, the assembly tightness between the check valve 2 and the installation channel 34 can be further improved through the interference fit between the check valve 2 and the inner wall of the installation channel 34, the check valve 2 is prevented from falling off to a great extent, and the reliability between the check valve 2 and the installation channel 34 is improved.

For the interference fit between the check valve 2 and the installation channel 34, when the installation is performed, the diameter of the check valve 2 may be set to be slightly larger than that of the installation channel 34, so as to install the check valve 2 into the installation channel 34 by knocking or other means; alternatively, the outer wall of the check valve 2 is provided with a flexible housing having a diameter slightly larger than the diameter of the mounting channel 34, which can facilitate assembly of the two by virtue of the flexible nature of the flexible housing.

As shown in fig. 2, further, as an alternative embodiment of the present application, the check valve 2 may include a housing having a transfer passage 21, and a valve body disposed in the transfer passage 21, the transfer passage 21 having an operating end 22 facing the outlet end 32, an inner wall of the operating end 22 being provided with a fixing structure.

Since the operation end 22 is an end for attaching and detaching the check valve 2, the operation end 22 faces the outlet end 32, and insertion of a tool can be facilitated.

The specific arrangement of the fixing structure is not limited in the present application, and it may be a thread surrounding the inner wall of the operation end 22, so as to perform a threaded fit with the fixing structure through a disassembling tool to disassemble the check valve 2; in addition, the fixing structure can also be arranged to surround a groove arranged on the inner wall of the operation end 22, and the one-way valve 2 can be pulled to be detached by matching a tool with the groove.

As a preferred embodiment of the present application, a top part 36 is disposed at a connection position of the installation channel 34 and the air channel 33, and the top part 36 abuts against the check valve 2.

As shown in fig. 3, the abutting portion 36 may have a stepped structure and is formed by protruding the inner wall of the installation channel 34 toward the center, so that the abutting portion 36 can play a role of reminding the one-way valve 2 of being in place, and the one-way valve 2 can be prevented from sliding toward the inside of the air channel 33 to a great extent.

The abutting portion 36 may be provided with an annular protrusion protruding toward the outlet end 32, and an end surface of the check valve 2 abutting against the abutting portion 36 may be provided with a groove matching with the annular protrusion, so that the check valve 2 is connected with the abutting portion 36 through the matching between the protrusion and the groove, and the check valve 2 is further prevented from being separated from the installation channel 34.

As a preferred embodiment of the present application, the inner wall of the mounting passage 34 is provided with a first positioning portion, and the outer wall of the check valve 2 is provided with a second positioning portion engaged with the first positioning portion to restrict the axial movement of the check valve 2 along the gas supply pipe 3.

As for the arrangement of the first positioning portion and the second positioning portion, the present application is described in the following two different embodiments:

the first implementation mode comprises the following steps:

one of the first positioning portion and the second positioning portion is a positioning protrusion 41, the other of the first positioning portion and the second positioning portion is a positioning groove, the first positioning portion surrounds the inner wall of the installation channel 34, and the second positioning portion surrounds the outer wall of the check valve 2; through the assembly between the positioning protrusion 41 and the positioning groove, the axial positioning between the installation channel 34 and the one-way valve 2 is realized, the one-way valve 2 is prevented from being separated from the installation channel 34 to a great extent, and the connection reliability of the engine cylinder cover assembly is improved.

The second embodiment:

one of the first positioning portion and the second positioning portion is a positioning protrusion 41, the other is a positioning groove, the first positioning portion is provided in plurality and spaced along the circumferential direction of the installation channel 34, and the second positioning portion and the first positioning portion are provided in one-to-one correspondence. With the cooperation between first location portion and the second location portion, realize the axial positioning between installation passageway 34 and the check valve 2 to can wrap up location arch 41 through a plurality of constant head tanks, prevent to a great extent check valve 2 for the circumferential direction of installation passageway 34, further improve the inseparable degree of connecting between the two.

As a preferred embodiment of the present application, the outer wall of the outlet end 32 is provided with a guide slope 37. As shown in fig. 3, the outlet end 32 may form a structure similar to a cone, and the guide inclined surface 37 is a conical outer surface, so that when the gas supply pipe 3 is assembled into the accommodating cavity 4, the guide inclined surface 37 plays a role in guiding, and prevents the gas supply pipe 3 from colliding with the inner wall of the accommodating cavity 4 when being inserted to a great extent, thereby preventing the gas supply pipe 3 from colliding with the inner wall of the accommodating cavity 4 to cause damage, and enabling the gas supply pipe 3 to be inserted more smoothly.

The guiding inclined plane 37 may be a smooth arc inclined plane to reduce the friction between the inlet end 32 of the air supply pipe 3 and the inner wall of the cavity 4, so that the air supply pipe 3 can be inserted more smoothly.

As a preferred embodiment of the present application, a positioning protrusion 41 protruding out of the outer wall of the gas supply pipe 3 is provided between the inlet end 31 and the outlet end 32, and a stop portion 42 capable of abutting against the positioning protrusion 41 is provided on the inner wall of the cavity 4.

As shown in fig. 3, the positioning protrusion 41 may be an irregular structure to improve the abutting effect between the positioning protrusion 41 and the stopping portion 42, and the outer diameter of the positioning protrusion 41 is larger than the outer diameter of the air supply pipe 3 by protruding the outer wall of the air supply pipe 3.

Further, the engine cylinder head assembly further comprises a sealing element, the positioning protrusion 41 or the inner wall of the accommodating cavity 4 is provided with an accommodating groove 43 for accommodating the sealing element, and the sealing element is respectively abutted against the inner wall of the accommodating cavity 4 and the positioning protrusion 41. Because the diameter of the positioning bulge 41 is larger than the diameter of other parts of the air supply pipe 3, the positioning bulge 41 is provided with the accommodating groove 43, the influence on the rigidity caused by slotting on the pipe wall can be avoided to a certain extent, and the sealing ring 44 can be arranged in the sealing groove to improve the sealing performance between the air supply pipe 3 and the accommodating cavity 4 and improve the tightness degree of the air cylinder assembly.

Where not mentioned in this application, can be accomplished using or referencing existing technology.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. The utility model provides an engine cylinder lid subassembly, includes cylinder lid body, check valve, air supply pipe and holding the appearance chamber of air supply pipe, a serial communication port, the air supply pipe has entry end and exit end along the air current direction, be provided with gas circuit passageway and installation passageway in the air supply pipe, the gas circuit passageway certainly the entry end to the exit end extends, the installation passageway certainly the exit end to the entry end extends, and with the gas circuit passageway intercommunication, the internal diameter of installation passageway is greater than the internal diameter of gas circuit passageway, be used for the installation in the installation passageway the installation of check valve is located.

2. An engine head assembly according to claim 1, wherein said check valve is inserted into said mounting passage from said outlet end and said check valve is in interference fit with an inner wall of said mounting passage.

3. An engine head assembly according to claim 2, wherein the junction of the mounting channel and the air passage channel is provided with a butting portion, and the butting portion butts against the one-way valve.

4. An engine head assembly according to claim 1, wherein the inner wall of the mounting passage is provided with a first locating portion, and the outer wall of the check valve is provided with a second locating portion which cooperates with the first locating portion to restrict axial movement of the check valve along the air supply duct.

5. An engine head assembly according to claim 4, wherein one of the first detent and the second detent is a detent projection and the other of the first detent and the second detent is a detent groove, the first detent surrounding an inner wall of the mounting passage and the second detent surrounding an outer wall of the check valve; alternatively, the first and second electrodes may be,

the first positioning parts are arranged in a plurality of circumferential intervals along the installation channel, and the second positioning parts and the first positioning parts are arranged in a one-to-one correspondence manner.

6. An engine head assembly according to claim 1, wherein the one-way valve comprises a housing having an excess flow passage and a valve body disposed in the excess flow passage, the excess flow passage having an operative end facing the outlet end, an inner wall of the operative end being provided with a securing formation.

7. An engine head assembly according to claim 1, wherein the outer wall of the outlet end is provided with a leading chamfer.

8. An engine head assembly according to claim 1, wherein a locating projection projecting from the outer wall of the air supply conduit is provided between the inlet end and the outlet end, and a stop portion capable of abutting against the locating projection is provided on the inner wall of the housing.

9. The engine cylinder head assembly of claim 8, further comprising a sealing element, wherein the positioning protrusion or an inner wall of the cavity is provided with a receiving groove for receiving the sealing element, and the sealing element abuts against the inner wall of the cavity and the positioning protrusion, respectively.

10. The engine head assembly of claim 1, further comprising a spark plug and a pre-chamber, said spark plug and said outlet end each communicating with said pre-chamber.

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