CN218991730U

CN218991730U - Built-in compression structure and engine

Info

Publication number: CN218991730U
Application number: CN202320072378.7U
Authority: CN
Inventors: 杨文蕾; 朱立铭; 夏春雨; 刘东航; 熊鹏
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-05-09
Anticipated expiration: 2033-01-10

Abstract

The utility model relates to the technical field of engines, in particular to a built-in compression structure and an engine, wherein the built-in compression structure comprises a cylinder cover, a stepped hole is formed in the cylinder cover, the stepped hole comprises a first hole and a second hole which are communicated with each other, the aperture of the second hole is larger than that of the first hole, and the second hole is a threaded hole; the precombustion chamber is arranged in the stepped hole in a penetrating mode and is abutted to the transition surface of the first hole and the transition surface of the second hole; the hollow thread sleeve is in threaded connection with the second hole, and the hollow thread sleeve is in abutting connection with the precombustion chamber; and the spark plug passes through the hollow threaded sleeve and is connected with the precombustion chamber. The utility model ensures the installation of the precombustion chamber and the spark plug and simultaneously can compress the precombustion chamber and the cylinder head.

Description

Built-in compression structure and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a built-in compression structure and an engine.

Background

For the high-efficiency internal combustion engine applying the pre-combustion technology, the pre-combustion chamber is arranged in the cylinder head of the engine, and the spark plug is also required to be arranged in the pre-combustion chamber and is fixedly connected with the pre-combustion chamber. Since the precombustor is subjected to the burst pressure of the main combustion chamber, compression is required between the precombustor and the cylinder head. The arrangement of the structure for compacting the prechamber and the cylinder head is made very difficult by the fitting relationship of the spark plug to the prechamber.

Therefore, there is a need for a built-in compression structure and engine to address the above-described problems.

Disclosure of Invention

The utility model aims to provide a built-in compression structure and an engine, which can ensure the installation of a precombustion chamber and a spark plug and simultaneously compress the precombustion chamber and a cylinder head.

To achieve the purpose, the utility model adopts the following technical scheme:

built-in compress tightly structure includes:

the cylinder cover is provided with a stepped hole, the stepped hole comprises a first hole and a second hole which are communicated with each other, the aperture of the second hole is larger than that of the first hole, and the second hole is a threaded hole;

the precombustion chamber is arranged in the stepped hole in a penetrating mode and is abutted to the transition surface of the first hole and the transition surface of the second hole;

the hollow thread sleeve is in threaded connection with the second hole, and the hollow thread sleeve is in abutting connection with the precombustion chamber;

and the spark plug passes through the hollow threaded sleeve and is connected with the precombustion chamber.

Further, the prechamber comprises a first segment and a second segment arranged coaxially and connected to each other, the first segment being located in the first hole and the second segment being located in the second hole.

Further, the inner wall of the precombustor is provided with internal threads, the spark plug is provided with external threads, and the spark plug is in threaded connection with the precombustor.

Further, a screwing groove is formed in one end, far away from the precombustion chamber, of the hollow threaded sleeve.

Further, a plurality of the screwing grooves are arranged at equal intervals along the circumferential direction of the hollow thread sleeve.

Further, an abutting ring part is arranged at one end of the hollow threaded sleeve, which faces the precombustion chamber.

Further, the abutting ring part and the hollow thread sleeve are of an integrated structure.

Further, a sealing ring is arranged between the precombustion chamber and the cylinder cover.

Further, the sealing ring is a metal sealing ring.

An engine comprising a built-in compression structure as described above.

The utility model has the beneficial effects that:

according to the built-in compacting structure, the stepped hole is formed in the cylinder cover, the stepped hole comprises the first hole and the second hole which are communicated with each other, the precombustor is arranged in the stepped hole in a penetrating mode, the hollow threaded sleeve is connected in the second hole in a threaded mode, the hollow threaded sleeve is abutted to the precombustor, so that the precombustor and the cylinder cover are guaranteed to be compacted, and the spark plug penetrates through the hollow threaded sleeve to be connected with the spark plug, so that the spark plug can be conveniently installed on the precombustor.

The engine provided by the utility model comprises the built-in compacting structure, so that the compacting between the precombustor and the cylinder head can be ensured while the precombustor and the spark plug are installed.

Drawings

FIG. 1 is a cross-sectional view of a built-in compression structure of the present utility model;

FIG. 2 is a schematic illustration of a hollow threaded sleeve with a built-in compression structure according to the present utility model;

FIG. 3 is a cross-sectional view of a hollow threaded sleeve with a built-in compression structure according to the present utility model;

fig. 4 is a partial cross-sectional view of a cylinder head in a built-in compression structure of the present utility model.

In the figure:

1. a cylinder head; 11. a first hole; 12. a second hole; 2. a precombustion chamber; 21. a first section; 22. a second section; 3. a hollow threaded sleeve; 31. an abutting ring portion; 32. a screwing groove; 4. a spark plug; 5. and (3) sealing rings.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

When the precombustion chamber and the spark plug are arranged on the cylinder cover, the precombustion chamber and the spark plug can be arranged and pressed between the precombustion chamber and the cylinder cover, as shown in fig. 1-4, the utility model provides a built-in pressing structure. The built-in compression structure comprises a cylinder cover 1, a precombustion chamber 2, a hollow thread bush 3 and a spark plug 4.

Wherein, the cylinder cover 1 is provided with a stepped hole, the stepped hole comprises a first hole 11 and a second hole 12 which are communicated with each other, the aperture of the second hole 12 is larger than that of the first hole 11, and the second hole 12 is a threaded hole; the precombustion chamber 2 is arranged in the stepped hole in a penetrating way, and the precombustion chamber 2 is abutted with the transition surfaces of the first hole 11 and the second hole 12; the hollow thread sleeve 3 is in threaded connection with the second hole 12, and the hollow thread sleeve 3 is in abutting connection with the precombustion chamber 2; the spark plug 4 is connected with the precombustor 2 through the hollow threaded sleeve 3.

Through the hollow thread sleeve 3 which is screwed in the second hole 12, the hollow thread sleeve 3 is abutted against the precombustion chamber 2, so that the precombustion chamber 2 and the cylinder head 1 are ensured to be tightly pressed, and the spark plug 4 passes through the hollow thread sleeve 3 to be connected with the spark plug 4, so that the spark plug 4 is convenient to install on the precombustion chamber 2.

Further, the prechamber 2 comprises a first segment 21 and a second segment 22 arranged coaxially and interconnected, the first segment 21 being located in the first bore 11 and the second segment 22 being located in the second bore 12. By designing the prechamber 2 to be stepped, the installation and positioning of the prechamber 2 in the stepped bore is facilitated.

Further, the inner wall of the prechamber 2 is provided with an internal thread, the spark plug 4 is provided with an external thread, and the spark plug 4 is in threaded connection with the prechamber 2. By screwing the prechamber 2 and the spark plug 4, the installation and the removal of the spark plug 4 are facilitated.

Further, the end of the hollow nipple 3 remote from the prechamber 2 is provided with a screwing groove 32. By providing the screwing groove 32 on the hollow thread bush 3, the hollow thread bush 3 can be rotated by a special tool, thereby facilitating the installation and the disassembly. And the hollow thread sleeve 3 is in threaded connection with the second hole 12, so that the force applied to the precombustion chamber 2 can be ensured, the precombustion chamber 2 is tightly pressed with the cylinder cover 1, and the explosion pressure of the main combustion chamber can be borne.

Further, a plurality of screw grooves 32 are provided at equal intervals in the circumferential direction of the hollow screw sleeve 3. By providing a plurality of screwing grooves 32, the hollow thread bush 3 can be easily mounted and dismounted when the hollow thread bush 3 is screwed by a special tool.

Further, a gasket 5 is provided between the prechamber 2 and the cylinder head 1. Specifically, the sealing ring 5 is sleeved on the first section 21 of the precombustion chamber 2, and the sealing ring 5 is located at the transition surface of the first hole 11 and the second hole 12. The sealing ring 5 can prevent the gas of the main combustion chamber from flowing into the stepped hole.

Further, the seal ring 5 is a metal seal ring. The metal sealing ring is adopted, so that the sealing ring 5 can meet the requirement of high-temperature environment operation.

Further, an abutment ring 31 is fixedly provided at the end of the hollow threaded sleeve 3 facing the prechamber 2. By providing the abutment ring portion 31, the contact area between the hollow screw sleeve 3 and the prechamber 2 can be increased, thereby ensuring that the abutment pressure applied to the prechamber 2 is uniform. The compression of the precombustor 2 and the cylinder head 1 is ensured, and the crushing of the sealing ring 5 is prevented.

Further, the abutment ring portion 31 and the hollow thread bush 3 are of an integrated structure. By the above arrangement, on the one hand, the connection strength of the abutment ring portion 31 and the hollow thread bush 3 is ensured, and on the other hand, the manufacturing is facilitated.

The built-in compression structure is adopted, so that the compression of the precombustion chamber 2 and the cylinder head 1 is realized while the assembly of the spark plug 4 is ensured, and the space is saved; the size of the precombustion chamber 2, the stepped hole of the cylinder cover 1 and the size of the hollow thread bush 3 are cooperatively designed, so that the implementation of the machining process and the assembly process is ensured. And the internal pattern structure formed by the screwing groove 32 of the hollow thread bush 3 does not occupy additional installation space.

The embodiment also provides an engine, comprising the built-in compacting structure, which can ensure the installation of the precombustion chamber 2 and the spark plug 4 and simultaneously compact the precombustion chamber 2 and the cylinder head 1.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Built-in compress tightly structure, its characterized in that includes:

the cylinder cover (1) is provided with a stepped hole, the stepped hole comprises a first hole (11) and a second hole (12) which are communicated with each other, the aperture of the second hole (12) is larger than that of the first hole (11), and the second hole (12) is a threaded hole;

a precombustion chamber (2), wherein the precombustion chamber (2) is penetrated in the stepped hole and is abutted with the transition surfaces of the first hole (11) and the second hole (12);

the hollow thread sleeve (3) is in threaded connection with the second hole (12), and the hollow thread sleeve (3) is abutted with the precombustion chamber (2);

and the spark plug (4) penetrates through the hollow threaded sleeve (3) and is connected with the precombustion chamber (2).

2. The built-in compression structure according to claim 1, characterized in that the prechamber (2) comprises a first segment (21) and a second segment (22) arranged coaxially and connected to each other, the first segment (21) being located in the first hole (11) and the second segment (22) being located in the second hole (12).

3. The built-in compression structure according to claim 1, characterized in that the inner wall of the pre-combustion chamber (2) is provided with an internal thread, the spark plug (4) is provided with an external thread, and the spark plug (4) is screwed with the pre-combustion chamber (2).

4. The built-in compression structure according to claim 1, characterized in that the end of the hollow thread bush (3) remote from the prechamber (2) is provided with a screwing groove (32).

5. The built-in pressing structure according to claim 4, wherein a plurality of the screw grooves (32) are provided at equal intervals in the circumferential direction of the hollow screw bush (3).

6. The built-in compression structure according to claim 1, characterized in that the end of the hollow threaded sleeve (3) facing the prechamber (2) is provided with an abutment ring (31).

7. The built-in pressing structure according to claim 6, characterized in that the abutment ring portion (31) is of an integrated structure with the hollow threaded sleeve (3).

8. The built-in compression structure according to claim 1, characterized in that a sealing ring (5) is arranged between the prechamber (2) and the cylinder head (1).

9. The built-in pressing structure according to claim 8, characterized in that the sealing ring (5) is a metal sealing ring.

10. An engine comprising the built-in compression structure according to any one of claims 1-9.