CN214887399U

CN214887399U - Oil return structure of cylinder head cover

Info

Publication number: CN214887399U
Application number: CN202121542246.3U
Authority: CN
Inventors: 刘玉权; 刘俊; 冯开利; 杨林强
Original assignee: Chongqing Sokon Industry Group Co Ltd
Current assignee: Chongqing Xiaokang Power Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-11-26
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses an oil return structure of a cylinder head cover, which comprises an oil return piece for connecting a cylinder head and the cylinder head cover, wherein the middle part of the oil return piece is provided with an oil return hole, one end of the oil return piece close to the cylinder head is provided with a deformable claw structure, and the end part of the claw structure is provided with a small opening and a large inner cavity; the inner cavity of the clamping jaw structure is provided with a spherical switch valve, the inner cavity of the clamping jaw structure is communicated with the oil return hole, and the diameter of the communicated part is smaller than that of the switch valve; the switch valve can move along the axial direction of the oil return hole. By adopting the utility model, when the internal pressure of the cylinder cover is large, the switch valve can be jacked up to seal the oil return hole, so that the oil gas in the cylinder cover can not move into the oil return hole, the oil-gas separation effect of the cylinder cover is improved, and the discharge of the oil gas is reduced; when the oil quantity in the oil return hole is accumulated to a certain degree and the downward pressure applied to the switch valve is enough, the switch valve is pressed downward, so that the oil in the oil return hole flows into the cylinder cover; the oil return structure is simple in structure and convenient to self-adjust.

Description

Oil return structure of cylinder head cover

Technical Field

The utility model relates to an oil return structure, especially an oil return structure of cylinder head cover.

Background

With the implementation of national emissions regulations, the demands on the functionality of engine crankcase ventilation systems are nowadays increasingly intensified.

The cylinder cover and the cylinder cover are used as important components of a crankcase ventilation system and are connected through an oil return structure, so that optimization of the oil return structure plays an important role in improving oil-gas separation efficiency, engine oil consumption can be reduced, and emission pollution is reduced; specifically, if the oil return structure is not sealed and adjusted well, when the internal pressure of the cylinder cover is high, oil gas can reach the ventilation pipe of the cylinder cover from the oil return pipe and be discharged; the oil gas discharged from the oil-gas separator is not subjected to oil-gas separation by the oil-gas separator, so that the oil-gas content in the discharged gas is too high. The existing oil return structure has the problems of too complex structure, inconvenience in installation and high cost.

Disclosure of Invention

The utility model aims to provide a: aiming at the problems of complex structure and inconvenient installation of the oil return structure in the prior art, the oil return structure of the cylinder head cover with simple structure and convenient installation is provided.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

an oil return structure of a cylinder head cover comprises an oil return piece for connecting a cylinder head and the cylinder head cover, wherein an oil return hole is formed in the middle of the oil return piece; the inner cavity of the clamping jaw structure is provided with a spherical switch valve, the inner cavity of the clamping jaw structure is communicated with the oil return hole, and the diameter of the communicated part is smaller than that of the switch valve; the switch valve can move along the axial direction of the oil return hole.

By adopting the technical scheme, when the internal pressure of the cylinder cover is high, the switching valve can be jacked up to seal the oil return hole, so that oil gas in the cylinder cover cannot move into the oil return hole, the oil-gas separation effect of the cylinder cover is improved, and the discharge of the oil gas is reduced; when the oil quantity in the oil return hole is accumulated to a certain degree and the downward pressure applied to the switch valve is enough, the switch valve is pressed downward, so that the oil in the oil return hole flows into the cylinder cover; the oil return structure is simple in structure and convenient to self-adjust.

Further, the claw structure is a four-claw structure. The four-claw structure has good deformation, the installation of the switch valve is convenient, and the switch valve is directly pressed into the inner cavity of the four-claw structure from the end part of the four-claw structure.

Furthermore, the oil return hole is divided into a first oil return section, a buffer section and a second oil return section which are communicated, and the first oil return section is communicated with the inner cavity of the jaw structure; the inner diameter of the second oil return section is larger than that of the first oil return section, and the second oil return section and the first oil return section are smoothly connected through the buffer section. The second oil return section with the large inner diameter is convenient for storing more oil, so that the switch valve can be pressed down conveniently; the first oil return section with the small inner diameter is convenient to be sealed by the switch valve.

Further, the oil return member is made of deformable plastic. Simple structure, the deformable is blocked with turn-ups ooff valve.

Further, the on-off valve is made of light plastic. The switch valve is light in weight and convenient to adjust.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that: when the internal pressure of the cylinder cover is high, the switch valve is jacked up to seal the oil return hole, so that oil gas in the cylinder cover cannot move into the oil return hole, the oil-gas separation effect of the cylinder cover is improved, and the discharge of the oil gas is reduced; when the oil quantity in the oil return hole is accumulated to a certain degree and the downward pressure applied to the switch valve is enough, the switch valve is pressed downward, so that the oil in the oil return hole flows into the cylinder cover; the oil return structure is simple in structure and convenient to self-adjust.

Drawings

The accompanying drawings, which form a part of the present application, 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 shows a schematic diagram of an oil return structure of the cylinder head cover of the present invention.

Fig. 2 shows a cross-sectional view at a-a in fig. 1.

Wherein the figures include the following reference numerals:

1, an oil return piece; 2, an oil return hole; 21 a first oil return section; 22 a buffer section; 23 a second oil return section; 3, a claw structure; 4, opening and closing the valve.

Detailed Description

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 and 2, an oil return structure of a cylinder head cover comprises an oil return member 1 for connecting a cylinder head and the cylinder head cover, wherein an oil return hole 2 is formed in the middle of the oil return member 1, a deformable jaw structure 3 is arranged at one end, close to the cylinder head, of the oil return member 1, and an opening at the end part of the jaw structure 3 is small and an inner cavity is large; the inner cavity of the jaw structure 3 is provided with a spherical switch valve 4, the inner cavity of the jaw structure 3 is communicated with the oil return hole 2, and the diameter of the communicated part is smaller than that of the switch valve 4; the on-off valve 4 can move along the axial direction of the oil return hole 2.

Preferably, the jaw structure 3 is a four-jaw structure.

Preferably, the oil return hole 2 is divided into a first oil return section 21, a buffer section 22 and a second oil return section 23 which are communicated, and the first oil return section 21 is communicated with an inner cavity of the jaw structure 3; the second oil return section 23 has a larger inner diameter than the first oil return section 21 and is smoothly connected to the first oil return section by the buffer section 22.

Preferably, the oil return member 1 is made of deformable plastic.

Preferably, the on-off valve 4 is made of light plastic.

The on-off valve is made of light plastic. (the concrete material is PA66+ GF30)

The scope of the present invention is defined not by the above-described embodiments but by the appended claims and equivalents thereof.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil return structure of a cylinder head cover comprises an oil return piece (1) used for connecting a cylinder head and the cylinder head cover, and is characterized in that an oil return hole (2) is formed in the middle of the oil return piece (1), a deformable clamping jaw structure (3) is arranged at one end, close to the cylinder head, of the oil return piece (1), and an opening at the end part of the clamping jaw structure (3) is small and an inner cavity of the clamping jaw structure is large; a spherical switch valve (4) is arranged in the inner cavity of the jaw structure (3), the inner cavity of the jaw structure (3) is communicated with the oil return hole (2), and the diameter of the communicated part is smaller than that of the switch valve (4); the switch valve (4) can move along the axial direction of the oil return hole (2).

2. Oil return structure of the cylinder head cover according to claim 1, characterized in that the claw structure (3) is a four-claw structure.

3. The oil return structure of the cylinder head cover according to claim 1, characterized in that the oil return hole (2) is divided into a first oil return section (21), a buffer section (22) and a second oil return section (23) which are communicated, the first oil return section (21) is communicated with an inner cavity of the jaw structure (3); the inner diameter of the second oil return section (23) is larger than that of the first oil return section (21), and the second oil return section and the first oil return section are smoothly connected through the buffer section (22).

4. Oil return structure of the cylinder head cover according to claim 1, characterized in that the oil return member (1) is made of deformable plastic.

5. Oil return structure of the cylinder head cover according to claim 1, characterized in that the on-off valve (4) is made of lightweight plastic.