CN219220554U

CN219220554U - Crankcase air supplementing one-way valve

Info

Publication number: CN219220554U
Application number: CN202223154979.7U
Authority: CN
Inventors: 马宝玲; 范杰; 施振华; 左树峰; 王天朔
Original assignee: Hebei Chinaust Automotive Plastics Co Ltd
Current assignee: Hebei Chinaust Automotive Plastics Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-06-20
Anticipated expiration: 2032-11-24

Abstract

The utility model discloses a crankcase air supplementing one-way valve, wherein the outer side of a lower one-way valve body is fixedly connected with a mounting bushing, the inner wall of the lower one-way valve body is fixedly connected with a fixed support flange, the top end of the lower one-way valve body is provided with an upper one-way valve body, the joint of the lower one-way valve body and the upper one-way valve body is provided with a one-way valve membrane, the inner center position of the upper one-way valve body is provided with an air flow limiting hole, and the bottom end of the upper one-way valve body is provided with an upper sealing curved surface. According to the utility model, the lower check valve body and the upper check valve body can be used for compensating fresh air in the crankcase and simultaneously directly preventing fuel steam from overflowing, and the lower check valve body and the upper check valve body are compact in structure and convenient to install, so that good operability is provided for installation, powerful supplementation of an automobile ventilation control system can be realized, the stability of the crankcase is improved, more fuel steam is prevented from being discharged to the atmosphere, and the environment-friendly effect is realized.

Description

Crankcase air supplementing one-way valve

Technical Field

The utility model relates to the technical field of air supplementing check valves, in particular to a crankcase air supplementing check valve.

Background

Air supplementing one-way valve belongs to car ventilation control system field. The one-way valve is added between the automobile engine and the crankshaft ventilating box, so that the pressure in the crankcase can be maintained for supplementing air for the crankcase, and meanwhile, the gas in the crankcase can be prevented from overflowing, and the safety is improved while the fuel efficiency of the engine is improved.

In the prior art, a one-way valve is not arranged between an engine and a crankshaft ventilation box of the ventilation control system of the automobile, so that fresh air cannot enter a crankcase to supplement air, and in addition, fuel steam gas in the crankcase overflows, so that the internal pressure of the crankcase is kept not to be balanced to a certain degree during low-load ventilation, and the stability of the crankcase is reduced.

Therefore, we propose a crankcase air-supplementing one-way valve to solve the above-mentioned problem that can't make-up and gas overflows.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a crankcase air supplementing one-way valve.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a crankcase air supplementing check valve, includes check valve body down, the outside fixedly connected with installation bush of check valve body down, the inner wall fixedly connected with fixed support flange of check valve body down, check valve body installs on the top of check valve body down, check valve body and last check valve body's junction is provided with the check valve diaphragm down, the inside central point department of going up the check valve body has seted up the air flow restriction hole, go up the bottom of check valve body and seted up sealed curved surface.

Preferably, the outer surface of the bottom end of the lower one-way valve body is provided with an annular groove, an O-shaped sealing ring is sleeved in the annular groove, and the sealing performance of the installation of the lower one-way valve body can be improved through the O-shaped sealing ring.

Preferably, the top surface of the installation bushing is provided with a protruding block, the side surface of the protruding block is provided with an angle limiting hole, and the unidirectional valve body can be positioned and installed through the angle limiting hole formed in the side surface of the protruding block.

Preferably, the bottom outside fixedly connected with angle location muscle of last check valve body, the spacing downthehole wall size of angle of seting up of protruding piece side that installation bush top surface set up looks adaptation with the surface size looks of angle location muscle, establish in the spacing downthehole of angle through angle location muscle is inserted, can go up check valve body with spacing.

Preferably, the cross section of the fixed support flange is arc-shaped, and the surface of the fixed support flange is equidistantly separated from the fixed support flange to form a circle of through holes, and the one-way valve membrane can be conveniently attached to the surface of the fixed support flange through the arc-shaped cross section of the fixed support flange.

Preferably, the inner side of the upper sealing curved surface is set to be an arc surface, the surface radian of the fixed support flange is the same as the inner wall radian of the upper sealing curved surface, and the one-way valve membrane can be attached in the arc surface through the inner side of the upper sealing curved surface being set to be the arc surface.

Preferably, the top end surface of the lower check valve body and the bottom end surface of the upper check valve body are welded by ultrasonic waves.

Compared with the prior art, the utility model has the beneficial effects that:

the device can directly prevent the overflow of fuel steam when compensating fresh air in the crankcase through lower check valve body and last check valve body to compact structure through lower check valve body and last check valve body is convenient for install, provides better operability for providing the installation, can supply the automobile ventilation control system's powerfully, improves the stability of crankcase and avoids more fuel steam to discharge to the atmosphere simultaneously, plays the effect of environmental protection.

Drawings

FIG. 1 is a schematic front view of a crankcase air-supplementing check valve according to the present utility model;

FIG. 2 is a schematic cross-sectional elevation view of a crankcase ventilation check valve according to the utility model;

FIG. 3 is a schematic top view of the mounting bushing and fixed support flange structure of FIG. 1;

FIG. 4 is a schematic perspective view of the upper check valve body of FIG. 1;

FIG. 5 is a schematic perspective view of the diaphragm of the check valve of FIG. 1;

FIG. 6 is a schematic front view of a structure of a crankcase ventilation check valve according to another embodiment of the utility model, wherein a lower valve body is matched with a straight-through upper valve body;

fig. 7 is a schematic diagram of the flow direction of gas in the crankcase ventilation check valve according to the utility model.

In the figure: 1. a lower one-way valve body; 2. installing a bushing; 3. fixing the support flange; 4. an upper one-way valve body; 5. a one-way valve diaphragm; 6. an upper sealing curved surface; 7. an air flow restrictor orifice; 8. an O-ring seal; 9. angle positioning ribs; 10. and the angle limiting hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Fig. 1 is a schematic front view of a crankcase air-supplementing check valve according to the present utility model.

Referring to fig. 1, a crankcase air-supplementing check valve comprises a lower check valve body 1, a mounting bushing 2, an upper check valve body 4 and a check valve membrane 5.

Fig. 2 is a schematic cross-sectional elevation view of a crankcase ventilation check valve according to the utility model. The utility model provides a crankcase air-supplementing one-way valve, wherein the top of a lower one-way valve body 1 is embedded into an upper one-way valve body 4; the inner wall fixedly connected with fixed support flange 3 of the check valve body 1 down, the outside fixedly connected with installation bush 2 of the check valve body 1 down, the junction of check valve body 1 and last check valve body 4 is provided with check valve diaphragm 5.

The upper check valve body 4 can be connected with an air pipe (not shown in the figure) after air filtration through a DC rubber pipe connector at the tail end, so that the communication of the cavity inside the crankcase air supplementing check valve provided by the utility model is realized.

The joint of the lower check valve body 1 and the upper check valve body 4 is provided with a check valve membrane 5.

Further, referring to fig. 1 and 2, it can be known that the outer surface of the bottom end of the lower check valve body 1 is provided with an annular groove. The O-shaped sealing ring 8 can be conveniently installed through the annular groove formed in the outer surface of the bottom end of the lower one-way valve body 1, and the size of the O-shaped sealing ring 8 is embedded into the annular groove.

The outer side of the whole U-shaped lower check valve body 1 is fixedly connected with a mounting bushing 2, and the mounting bushing 2 can be directly connected with a crankcase cylinder cover (not shown in the figure) through a screw rod.

FIG. 3 is a schematic top view of the mounting bushing and fixed support flange structure of FIG. 1. Further, referring to fig. 2 and 3, it can be known that the top surface of the installation bushing 2 is provided with a protruding block, and the side surface of the protruding block is provided with an angle limiting hole 10, and the angle limiting hole 10 arranged on the side surface of the protruding block arranged on the top surface of the installation bushing 2 can conveniently enable the upper check valve body 4 to drive the angle positioning rib 9 to be inserted into the angle limiting hole 10, so that the function of conveniently positioning and installing the upper check valve body 4 is achieved.

Further, referring to fig. 2 and 4, it can be known that the outer side of the bottom end of the upper check valve body 4 is fixedly connected with an angle positioning rib 9. The inner wall size of the angle limiting hole 10 formed in the side surface of the protruding block arranged on the top end surface of the mounting bushing 2 is matched with the surface size of the angle positioning rib 9, and the angle positioning rib 9 can be conveniently inserted into the angle limiting hole 10.

Further, referring to fig. 2 and 3, it can be known that the cross section of the fixed support flange 3 is arc-shaped, and the surface of the fixed support flange 3 is equidistantly provided with a circle of through holes, so that air can circulate conveniently.

Fig. 4 is a schematic perspective view of the upper check valve body in fig. 1. Referring to fig. 4, an air flow restricting hole 7 is formed at the inner center of the upper check valve body 4, and the size of the air flow can be restricted by the air flow restricting hole 7.

Referring to fig. 4, the bottom end of the upper check valve body 4 is provided as a sealing curved surface 6. The inner side of the sealing curved surface 6 is set to be an arc surface, the surface radian of the fixed support flange 3 is the same as the inner wall radian of the upper sealing curved surface 6, and the one-way valve membrane 5 can be conveniently adsorbed on the inner side of the upper sealing curved surface 6 through the arc surface arranged on the inner side of the upper sealing curved surface 6, so that the inner part of the upper one-way valve body 4 is conveniently sealed.

Fig. 6 is a schematic front view showing a structure of a lower valve body matching a straight-through upper valve body in another embodiment of a crankcase air-supplementing check valve according to the utility model, as shown in fig. 6, the lower valve body of the utility model can be matched with upper valve bodies with different angles, so that the angle of an upper shell of the crankcase air-supplementing check valve according to the utility model can be adjusted according to the use environment.

Further, referring to fig. 1 and 2, it can be known that the top end surface of the lower check valve body 1 and the bottom end surface of the upper check valve body 4 are welded by ultrasonic, and the connection strength between the lower check valve body 1 and the upper check valve body 4 can be conveniently increased by using ultrasonic welding between the lower check valve body 1 and the upper check valve body 4, so that the overall structure is compact and reasonable.

In the utility model, the valve body is made of PA66-GF35 material, and has very good mechanical property and temperature resistance, so that the PCV valve can be ensured to be normally used at the temperature of between 40 ℃ below zero and 150 ℃.

In the utility model, the unidirectional function of the unidirectional valve is determined by the sealing curved surface structures of the diaphragm, the lower valve body supporting flange and the upper valve body. Wherein, the upper valve body is provided with a flow limiting hole to control the flow resistance characteristic; the upper valve body and the lower valve body are tightly and compactly welded, the lower valve body can be matched with the upper valve bodies with different angles, and the angle of the upper shell of the assembly is adjustable.

The utility model discloses a PCV air supplementing check valve, when compensating the interior fresh air of crankcase, directly prevented the overflow of fuel steam, the compact structure of the utility model is convenient for install, provides better operability for providing the installation. The utility model is a powerful supplement to the automobile ventilation control system, improves the stability of the crankcase, simultaneously avoids more fuel steam from being discharged to the atmosphere, and plays an environmental protection role.

Working principle: fig. 7 is a schematic diagram of the flow direction of gas in the crankcase ventilation check valve according to the utility model. When the utility model is used, the lower check valve body 1 can be fixed on the crankcase cylinder cover through the mounting bushing 2 according to the attached drawings 1, 2, 3, 4 and 5, the port of the upper check valve body 4 is communicated with the air pipe after air filtration through the rubber pipe, when the vacuum degree in the crankcase cylinder cover is greater than the vacuum degree of the port of the upper check valve body 4, the check valve membrane 5 is elastically deformed and attached to the flange of the fixed support flange 3 under the action of vacuum, the gap between the upper sealing curved surface 6 and the check valve membrane 5 ensures that the gas can smoothly pass through the fixed support flange 3, and meanwhile, the flow is limited by the air flow limiting hole 7 arranged in the upper check valve body 4, so that fresh air can conveniently enter the crankcase through the lower check valve body 1 and the upper check valve body 4; when the vacuum degree in the crankcase is smaller than that of the port of the upper check valve body 4, the check valve membrane 5 is tightly attached to the surface of the upper sealing curved surface 6, so that fuel vapor is prevented from overflowing from the crankcase, the powerful supplement of an automobile ventilation control system is facilitated, the stability of the crankcase is improved, more fuel vapor is prevented from being discharged to the atmosphere, and the environment-friendly effect is achieved.

The above is the working principle of the present utility model.

In the utility model, the installation mode, the connection mode or the setting mode of all the components are common mechanical modes, and the specific structure, the model and the coefficient index of all the components are self-contained technologies, so long as the beneficial effects can be achieved, the implementation can be carried out, and redundant description is omitted.

The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.

In the present utility model, unless otherwise indicated, the terms "about" and "front and back," inner and outer, and vertical levels, "etc., used herein are merely intended to refer to the orientation of the term in conventional use, or are colloquially known to those skilled in the art, and should not be construed as limiting the term, while the terms" first, "second," and "third," etc., do not denote a particular number or order, but are merely intended to be used in distinguishing between the terms, and the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims

1. The crankcase air supplementing one-way valve comprises a lower one-way valve body (1), a mounting bushing (2), an upper one-way valve body (4) and a one-way valve membrane (5), and is characterized in that,

the top of the lower one-way valve body (1) is embedded with an upper one-way valve body (4);

the outer side of the lower one-way valve body (1) is fixedly connected with a mounting bushing (2);

the inner wall of the lower one-way valve body (1) is fixedly connected with a fixed support flange (3);

a one-way valve membrane (5) is arranged at the joint of the lower one-way valve body (1) and the upper one-way valve body (4);

an air flow limiting hole (7) is formed in the center position of the inner part of the upper one-way valve body (4), and an upper sealing curved surface (6) is formed in the bottom end of the upper one-way valve body (4).

2. The crankcase air-supplementing one-way valve according to claim 1, wherein an annular groove is formed in the outer surface of the bottom end of the lower one-way valve body (1), and an O-shaped sealing ring (8) is sleeved in the annular groove.

3. The crankcase air-supplementing one-way valve according to claim 1, wherein the top end surface of the mounting bush (2) is provided with a protruding block, and the side surface of the protruding block is provided with an angle limiting hole (10).

4. The crankcase air supplementing one-way valve according to claim 1, wherein an angle positioning rib (9) is fixedly connected to the outer side of the bottom end of the upper one-way valve body (4), and the inner wall size of an angle limiting hole (10) formed in the side surface of a protruding block arranged on the top end surface of the mounting bushing (2) is matched with the surface size of the angle positioning rib (9).

5. A crankcase ventilation check valve according to claim 1, characterized in that the cross section of the fixed support flange (3) is arranged in an arc shape, and the surface of the fixed support flange (3) is equidistantly provided with a circle of through holes.

6. The crankcase air-supplementing one-way valve according to claim 1, wherein the inner side of the upper sealing curved surface (6) is provided with an arc surface, and the surface radian of the fixed support flange (3) is the same as the inner wall radian of the upper sealing curved surface (6).

7. A crankcase ventilation check valve according to claim 1, wherein the top end surface of the lower check valve body (1) and the bottom end surface of the upper check valve body (4) are welded by ultrasonic waves.

8. The crankcase ventilation check valve of claim 1, wherein the valve body is made of PA66-GF35 material.