Exhaust one-way valve

Abstract

The utility model belongs to the technical field of automobile air suspensions, and particularly relates to an exhaust one-way valve. The spring and the annular valve plate are arranged in the exhaust cavity, a guide column which is located in the exhaust cavity and extends in the direction close to the bottom wall of the base is arranged on the cover body, and the length L1 of the guide column is smaller than or equal to the distance L2 from the inner wall of the cover body to the bottom wall of the base; a first ventilation air hole is formed in the side wall of the base, a second ventilation air hole is formed in the cover body, and the first ventilation air hole and the second ventilation air hole are both communicated with the exhaust cavity; the multiple second ventilation air holes are formed in the circumferential direction of the guide column. The annular valve plate and the spring are both movably arranged on the guide column in a sleeving mode, and the annular valve plate is located between the cover body and the spring. When the annular valve plate is attached to the inner wall of the cover body, the annular valve plate seals the second ventilation air hole. The size of the exhaust one-way valve is reduced, and a one-way valve installation cavity formed in the valve block is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of automotive air suspension technology, specifically relating to an exhaust one-way valve. Background Technology

[0002] An automotive air suspension system includes a valve block, air springs, an air tank, a dryer, a piston pump, and a solenoid valve assembly. The valve block has air inlets and outlets, both connected to a flow channel. The valve block contains the flow channel, on which the air springs, air tank, dryer, piston pump, and solenoid valve assembly are mounted. These components are connected via the flow channel, and the solenoid valve assembly controls the opening and closing of the flow channel. To ensure unidirectional airflow from the piston pump outlet to the dryer inlet and from the dryer outlet to the air tank, the valve block typically has exhaust check valves connected to the flow channel. One exhaust check valve is located between the piston pump outlet and the dryer inlet, and the other is located between the dryer outlet and the air tank.

[0003] Existing exhaust check valves can be installed on valve blocks. For example, Chinese patent document CN205244495U discloses an exhaust check valve, including a valve body, valve core, spring, outer nut, and rubber sleeve. One end of the valve body has an inlet section with an exhaust channel, and the other end of the valve body has an external thread. The outer nut is threaded to the valve body, forming a cavity between the outer nut and the valve body. An exhaust hole is provided on the side wall of the cavity. The valve core is installed in the cavity to seal or open the exhaust channel. The spring is located between the outer nut and the valve core. The rubber sleeve is located at the exhaust hole. The valve core of the above-mentioned exhaust check valve has a spherical structure, resulting in a large volume of exhaust check valve. When installing the above-mentioned exhaust check valve on a valve block, a large check valve installation chamber is required. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an exhaust check valve that reduces the volume of the exhaust check valve and the size of the check valve mounting chamber on the valve block.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: an exhaust one-way valve, including a base, the base being a barrel-shaped structure with one open end, a cover being installed at the opening of the base, the base and the cover forming an exhaust chamber; it also includes a spring and an annular valve plate disposed in the exhaust chamber, the cover being provided with a guide post located in the exhaust chamber and extending towards the bottom wall of the base, the length L1 of the guide post being less than or equal to the distance L2 from the inner wall of the cover to the bottom wall of the base; a first vent hole is provided on the side wall of the base, and a second vent hole is provided on the cover, both the first and second vent holes being connected to the exhaust chamber; multiple second vent holes are provided, and the multiple second vent holes are arranged circumferentially along the guide post; the annular valve plate and the spring are both movably fitted on the guide post, the annular valve plate being located between the cover and the spring; when the annular valve plate is in contact with the inner wall of the cover, the annular valve plate closes the second vent hole.

[0006] Furthermore, the cover is provided with a groove arranged coaxially with the guide post, and the opening direction of the groove is the same as the opening direction of the base.

[0007] Furthermore, an annular sealing ring is provided on the outer wall of the cover, which is coaxially arranged with itself, and the second vent hole is located inside the annular sealing ring.

[0008] Furthermore, the annular sealing ring is made of rubber.

[0009] Furthermore, the base, cover, annular valve plate, and spring are all made of hard metal.

[0010] Furthermore, the cover and the guide post are integrally formed as a single structure.

[0011] Furthermore, the base and the cover are connected by a snap-fit ​​structure.

[0012] Furthermore, the base includes an exhaust section and an installation section arranged sequentially along its own axial direction; the installation section protrudes from the exhaust section in a direction away from the base axis; the exhaust section is adjacent to the base opening, and the installation section is adjacent to the bottom wall of the base; the first air passage is located in the exhaust section.

[0013] Furthermore, the outer wall of the base is provided with an annular chip collection groove arranged coaxially with itself. The annular chip collection groove is recessed towards the axis of the base and is located in the mounting section.

[0014] Furthermore, the guide post is arranged coaxially with the base.

[0015] Compared with the prior art, the beneficial effects of this utility model are: this utility model provides an exhaust check valve, which reduces the volume of the exhaust check valve and the size of the check valve mounting chamber on the valve block, thereby miniaturizing the valve block. It has the advantages of simple structure, high reliability, and miniaturization. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the installation structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the piston moving towards the cover.

[0019] Reference numerals: 1-Base; 101-First vent; 102-Exhaust chamber; 103-Exhaust section; 104-Mounting section; 105-Annular chip collection groove; 2-Cover; 201-Second vent; 202-Guide post; 203-Groove; 3-Annular valve plate; 4-Spring; 5-Annular sealing ring; 6-Valve block; 601-Flow channel; 602-Piston pump mounting chamber; 603-One-way valve mounting chamber; 7-Piston body; 701-Protrusion; 8-Cylinder liner; 801-Compression chamber; 802-Intake chamber. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] An exhaust one-way valve includes a base 1, which is a barrel-shaped structure with one open end. A cover 2 is installed at the opening of the base 1, and the base 1 and the cover 2 together form an exhaust chamber 102. It also includes a spring 4 and an annular valve plate 3 disposed within the exhaust chamber 102. A guide post 202 is disposed on the cover 2, located within the exhaust chamber 102 and extending towards the bottom wall of the base 1. The length L1 of the guide post 202 is less than or equal to the distance L2 between the inner wall of the cover 2 and the bottom wall of the base 1. A first flow path is formed on the side wall of the base 1. A vent 101 is provided, and a second vent 201 is provided on the cover 2. Both the first vent 101 and the second vent 201 are connected to the exhaust chamber 102. Multiple second vents 201 are provided and arranged circumferentially along the guide post 202. The annular valve plate 3 and the spring 4 are both movably fitted on the guide post 202. The annular valve plate 3 is located between the cover 2 and the spring 4. When the annular valve plate 3 is in contact with the inner wall of the cover 2, the annular valve plate 3 closes the second vent 201.

[0022] The valve block 6 contains a connected flow channel 601, a piston pump mounting chamber 602, and a one-way valve mounting chamber 603. The piston pump is installed in the piston pump mounting chamber 602, and the exhaust one-way valve is installed in the one-way valve mounting chamber 603. The base 1 closes the outer opening of the one-way valve mounting chamber 603. The cylinder liner 8 of the piston pump is coaxially mounted with the base 1, and one end of the cylinder liner 8 abuts against the outer wall of the cover 2. The piston body 7 of the piston pump is located inside the cylinder liner 8 and reciprocates linearly along the axial direction of the cylinder liner 8. The piston body 7 and the cylinder liner 8 are in a sliding seal. The compression end face of the piston body 7, the inner wall of the cylinder liner 8, and the outer wall of the cover 2 form a compression chamber 801. The second vent 201 is correspondingly arranged with and connected to the compression chamber 801. The end of the piston body 7 away from its own compression end and the inner wall of the cylinder liner 8 form an intake chamber 802. The sizes of the compression chamber 801 and the intake chamber 802 change with the movement of the piston body 7. When the piston body 7 moves closer to the cover 2, the compression chamber 801 shrinks, and the air in the compression chamber 801 pushes open the annular valve plate 3, causing the annular valve plate 3 to detach from the inner wall of the cover 2. The second vent 201 then connects to the exhaust chamber 102. At this time, the spring 4 is compressed, and the air in the compression chamber 801 enters the exhaust chamber 102 through the second vent 201, and then enters the flow channel 601 through the first vent 101. When the piston body 7 moves away from the cover 2, the compression chamber 801 expands, and the airflow causes the annular valve plate 3 to adhere to the inner wall of the cover 2. The annular valve plate 3 closes the second vent 201, and the spring 4 extends to prevent gas in the exhaust chamber 102 from entering the compression chamber 801 through the second vent 201.

[0023] Specifically, the bottom wall of base 1 refers to the wall opposite to its own opening. It should be noted that there is a gap between the outer side of the guide post 202 and the inner side wall of base 1.

[0024] Preferably, one end of the spring 4 is welded to the bottom wall of the base 1, and the other end is welded to the side of the annular valve plate 3 away from the cover 2.

[0025] Preferably, the length L1 of the guide post 202 is less than the distance L2 between the inner wall of the cover 2 and the bottom wall of the base 1.

[0026] Preferably, the cover 2 is provided with a groove 203 coaxially arranged with the guide post 202, and the opening direction of the groove 203 is the same as the opening direction of the base 1. The groove 203 is adapted to the protrusion 701 located at the compression end of the piston body 7. When the piston body 7 moves towards the cover 2 and the end face of the compression end of the piston body 7 is in contact with the outer wall of the cover 2, the protrusion 701 extends into the groove 203.

[0027] Preferably, an annular sealing ring 5 is provided on the outer wall of the cover 2, coaxially arranged with it, and the second vent hole 201 is located inside the annular sealing ring 5. The annular sealing ring 5 is used to seal the gap between the outer wall of the cover 2 and the end face of the cylinder liner 8.

[0028] The annular sealing ring 5 can be made of silicone. Preferably, the annular sealing ring 5 is made of rubber.

[0029] Preferably, the base 1, cover 2, annular valve plate 3, and spring 4 are all made of hard metal.

[0030] Preferably, the cover 2 and the guide post 202 are integrally formed. The groove 203 can be formed by stamping.

[0031] The base 1 and the cover 2 can be connected by a threaded structure. Preferably, the base 1 and the cover 2 are connected by a snap-fit ​​structure.

[0032] As a further preferred option, a sealing gasket can also be provided between the base 1 and the cover 2.

[0033] Preferably, the base 1 includes an exhaust section 103 and a mounting section 104 arranged sequentially along its own axial direction; the mounting section 104 protrudes from the exhaust section 103 in a direction away from the axis of the base 1; the exhaust section 103 is adjacent to the opening of the base 1, and the mounting section 104 is adjacent to the bottom wall of the base 1; the first vent 101 is located in the exhaust section 103. The mounting section 104 of the base 1 is press-fitted with the valve body 6 to achieve installation.

[0034] Preferably, the outer wall of the base 1 is provided with an annular chip collection groove 105 arranged coaxially with itself. The annular chip collection groove 105 is recessed towards the axis of the base 1 and is located in the mounting section 104. The annular chip collection groove 105 is used to store metal chips generated during pressing.

[0035] Preferably, the guide column 202 is arranged coaxially with the base 1.

[0036] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. All equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An exhaust check valve, characterized in that, The system includes a base (1), which is a barrel-shaped structure with one open end. A cover (2) is installed at the opening of the base (1), and the base (1) and the cover (2) together form an exhaust chamber (102). It also includes a spring (4) and an annular valve plate (3) disposed within the exhaust chamber (102). A guide post (202) is disposed on the cover (2) and extends towards the bottom wall of the base (1) from within the exhaust chamber (102). The length L1 of the guide post (202) is less than or equal to the distance L2 between the inner wall of the cover (2) and the bottom wall of the base (1). A first vent hole is provided on the side wall of the base (1). 101), the cover (2) is provided with a second vent hole (201), and both the first vent hole (101) and the second vent hole (201) are connected to the exhaust chamber (102); multiple second vent holes (201) are provided, and multiple second vent holes (201) are arranged around the guide post (202); the annular valve plate (3) and the spring (4) are both movably fitted on the guide post (202), and the annular valve plate (3) is located between the cover (2) and the spring (4); when the annular valve plate (3) is in contact with the inner wall of the cover (2), the annular valve plate (3) closes the second vent hole (201).

2. The exhaust check valve as described in claim 1, characterized in that, The cover (2) is provided with a groove (203) arranged coaxially with the guide post (202), and the opening direction of the groove (203) is the same as the opening direction of the base (1).

3. The exhaust check valve as described in claim 1, characterized in that, The outer wall of the cover (2) is provided with an annular sealing ring (5) arranged coaxially with itself, and the second vent (201) is located inside the annular sealing ring (5).

4. The exhaust check valve as described in claim 3, characterized in that, The annular sealing ring (5) is a rubber product.

5. The exhaust check valve as described in claim 1, characterized in that, The base (1), cover (2), annular valve plate (3) and spring (4) are all made of hard metal.

6. The exhaust check valve as described in claim 1, characterized in that, The cover (2) and the guide post (202) are integrally formed.

7. The exhaust check valve as described in claim 1, characterized in that, The base (1) and the cover (2) are connected by a snap-fit ​​structure.

8. The exhaust check valve as described in claim 1, characterized in that, The base (1) includes an exhaust section (103) and an installation section (104) arranged sequentially along its own axis; the installation section (104) protrudes from the exhaust section (103) in a direction away from the axis of the base (1); the exhaust section (103) is adjacent to the opening of the base (1), and the installation section (104) is adjacent to the bottom wall of the base (1); the first air passage (101) is located in the exhaust section (103).

9. The exhaust check valve as described in claim 8, characterized in that, The outer wall of the base (1) is provided with an annular chip collection groove (105) arranged coaxially with itself. The annular chip collection groove (105) is recessed in the direction close to the axis of the base (1) and is located in the mounting section (104).

10. The exhaust check valve as described in claim 1, characterized in that, The guide post (202) is arranged coaxially with the base (1).

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