Valve element assembly, one-way valve and vehicle

Abstract

The utility model discloses a valve element assembly, a one-way valve and a vehicle, and relates to the technical field of one-way valves, the valve element assembly is used for the one-way valve, the valve element assembly comprises a valve cover used for being connected with a valve body of the one-way valve, the valve cover is provided with a containing cavity, and a first limiting piece is arranged in the containing cavity; the valve element comprises a rod body and a piston part arranged at one end of the rod body, the other end of the rod body is movably arranged in the containing cavity, a second limiting piece is arranged on the outer side wall of the rod body, and the second limiting piece is matched with the first limiting piece to limit autorotation of the valve element; and the elastic piece is arranged between the rod body and the valve cover. The valve element assembly of the one-way valve is improved, noise is prevented from being generated in the opening and closing process of the one-way valve, and abrasion in the operation process of the one-way valve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way valves, in particular to a valve core component, a one-way valve and a vehicle. Background Art

[0002] As a key component for fluid flow control, one-way valves are widely used in industrial and medical equipment; their basic function is to allow the medium to flow under a positive pressure differential and to prevent the flow under a negative pressure differential. The traditional one-way valve design usually includes a valve seat and a valve core. When the positive pressure differential reaches a certain threshold, the valve core is pushed and opened, thereby allowing the medium to pass.

[0003] However, the existing one-way valve design has exposed certain limitations in practical applications. Specifically, when the medium flows in the forward direction and passes through the valve seat, a vortex may be formed, which can cause the valve core to rotate, resulting in friction between the valve core and the valve seat and thus noise, which can easily affect the user experience and cause wear of the one-way valve. Utility Model Content

[0004] The main purpose of the utility model is to provide a valve core component, a one-way valve and a vehicle, aiming to prevent the one-way valve from generating noise during opening and closing and reduce the wear of the one-way valve.

[0005] To achieve the above-mentioned purpose, the valve core assembly proposed in the utility model is used for a one-way valve, and the valve core assembly includes:

[0006] A valve cover, used to be connected to the valve body of the one-way valve, the valve cover having an accommodating cavity, and a first limiting member is arranged in the accommodating cavity;

[0007] A valve core, comprising a rod body and a piston portion disposed at one end of the rod body, the other end of the rod body being movably disposed in the accommodating cavity, an outer side wall of the rod body being provided with a second limiter, the second limiter cooperates with the first limiter to limit the rotation of the valve core; and

[0008] The elastic member is arranged between the rod body and the valve cover.

[0009] In one embodiment, the first limiting member is configured as a limiting groove, which is recessed in the inner wall of the accommodating cavity, and the second limiting member is configured as a limiting portion, which is protruding at one end of the rod body, and the limiting portion is slidably matched with the limiting groove.

[0010] In one embodiment, a fixing groove is provided at one end of the rod body, the elastic member is provided in the accommodating cavity, one end of the elastic member is embedded in the fixing groove, and the other end abuts against the bottom of the accommodating cavity.

[0011] In one embodiment, a guide channel is provided between the valve cover and the valve core, and the guide channel connects the accommodating cavity with the outside.

[0012] In one embodiment, the guide channel includes a hollow cavity and a guide hole, the hollow cavity is arranged at the bottom of the fixing groove, the guide hole is arranged at one end of the rod body away from the valve cover, and the guide hole is connected to the hollow cavity.

[0013] In one embodiment, a section is provided on the outer side wall of the rod body to enclose the inner side wall of the accommodating cavity to form the guide channel; and / or a section is provided on the inner side wall of the accommodating cavity to enclose the outer side wall of the rod body to form the guide channel.

[0014] In one embodiment, the section extends from one end of the rod body to the other end of the rod body; or, the section extends from the bottom of the accommodating cavity to the opening of the accommodating cavity.

[0015] In one embodiment, the length of the section in the axial direction of the rod body is greater than the movable stroke of the rod body relative to the valve cover.

[0016] In one embodiment, at least two limiting grooves are provided, and at least two limiting grooves are arranged at intervals around the rod body, and at least one limiting portion is arranged in each limiting groove.

[0017] In one embodiment, the outer peripheral wall of the piston portion is provided with a tapered surface portion, and the tapered surface portion extends obliquely in a direction away from the rod body.

[0018] In one embodiment, the conical surface portion is provided with a first sealing groove, the first sealing groove extends along the circumference of the piston portion, and the first sealing groove is used for assembling a sealing ring.

[0019] In one embodiment, the distance between the piston portion and the valve cover is greater than the movable stroke of the rod body relative to the valve cover.

[0020] In one embodiment, a second sealing groove extending along the circumference of the valve cover is formed on the outer peripheral wall of the valve cover, and the second sealing groove is used for assembling a sealing ring.

[0021] The utility model also provides a one-way valve, which comprises the valve core assembly mentioned above.

[0022] The utility model also provides a vehicle, which comprises the one-way valve mentioned above.

[0023] In the technical solution of the utility model, a first limit member is arranged on the valve cover and a second limit member is arranged on the valve core. The first limit member and the second limit member cooperate with each other to limit the rotation of the valve core when the valve core moves, thereby preventing the friction between the valve core and other components during movement and thus reducing noise, which is beneficial to improving the user experience of the one-way valve and also beneficial to reducing the wear of the valve core assembly, thereby extending the service life of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of the valve core assembly provided by the utility model;

[0026] Figure 2 A schematic diagram of the structure of a valve core in a valve core assembly provided by the utility model;

[0027] Figure 3 The present invention is a schematic structural diagram of a valve cover in a valve core assembly provided by the present invention.

[0028] Description of Figure Numbers:

[0029] 100, valve cover; 110, accommodating cavity; 120, second sealing groove; 200, valve core; 210, rod body; 211, fixing groove; 212, hollow cavity; 213, flow guide hole; 214, cut surface; 220, piston part; 221, conical surface part; 222, first sealing groove; 300, elastic member; 400, first limit member; 500, second limit member.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] A one-way valve generally includes a valve seat and a valve core 200 arranged on the valve seat. The valve core 200 can be opened by the positive pressure of the fluid. During the opening and closing process of the valve core 200, the valve core 200 is easy to rotate under the vortex generated by the fluid flow, which increases the friction between the valve core 200 and other components and generates noise, affecting the user experience and increasing the risk of mechanical wear of the one-way valve.

[0035] To this end, the technical solution proposes a valve core assembly for a one-way valve, the valve core assembly comprising:

[0036] The valve cover 100 is used to connect with the valve body of the one-way valve. The valve cover 100 has a receiving cavity 110. A first stopper 400 is provided in the receiving cavity 110.

[0037] The valve core 200 includes a rod body 210 and a piston portion 220 disposed at one end of the rod body 210. The other end of the rod body 210 is movably disposed in the accommodating chamber 110. The outer wall of the rod body 210 is provided with a second stopper 500. The second stopper 500 cooperates with the first stopper 400 to limit the rotation of the valve core 200; and

[0038] The elastic member 300 is disposed between the rod body 210 and the valve cover 100 .

[0039] In the technical solution of the present utility model, a first limit member 400 is arranged on the valve cover 100 and a second limit member 500 is arranged on the valve core 200. The first limit member 400 and the second limit member 500 cooperate with each other to limit the rotation of the valve core 200 when the valve core 200 moves, thereby reducing the friction between the valve core 200 and other components during movement and preventing the generation of noise, which is beneficial to improving the user experience of the one-way valve and also beneficial to reducing the wear of the valve core assembly, thereby extending the service life of the one-way valve.

[0040] In one embodiment of the utility model, the valve core assembly is applied to a one-way valve, which can be specifically applied to an air conditioning system, a water heating system or an air conditioning pipeline of a vehicle. The one-way valve includes a valve body and a valve core assembly arranged on the valve body, wherein the valve body has a flow channel for fluid flow inside, specifically including an inlet channel, an outlet channel and a valve port connecting the inlet channel and the outlet channel, and the valve core assembly includes a valve cover 100 and a valve core 200 movably connected to the valve cover 100, the valve cover 100 is fixed to the valve body, the valve cover 100 and the valve core 200 are connected through an elastic member 300, and the elastic member 300 seals the valve core 200 against the valve port. During operation, the fluid enters the inlet channel and applies positive pressure to the valve core 200 at the valve port and pushes the valve core 200 open, at which time the fluid can flow into the outlet channel through the valve port; and when the fluid pressure is reduced to a level insufficient to counteract the elastic force of the elastic member 300, the valve core 200 will close the valve port under the action of the elastic member 300 to interrupt the flow of the fluid.

[0041] The above is a specific application example of the valve core assembly in the one-way valve. The specific structure of the valve core assembly will be described below. Figure 1, the valve cover 100 is provided with a receiving chamber 110 with an opening on one side, the valve core 200 includes a rod body 210 and a piston part 220 arranged at one end of the rod body 210, the piston part 220 is a part used to block the valve port, and the end of the rod body 210 away from the piston part 220 extends from the opening into the receiving chamber 110 and forms a sliding fit relationship with the receiving chamber, the rod body 210 can move relative to the valve cover 100 along its own axial direction, thereby driving the piston part 220 to open or close the valve port; in addition, an elastic member 300 is provided between the rod body 210 and the valve cover 100, the two ends of the elastic member 300 are respectively connected to the rod body 210 and the valve cover 100, and the elastic member 300 applies an elastic force away from the valve cover 100 to the rod body 210, so as to ensure that the piston part 220 can be closely abutted against the valve port; in addition, in order to limit the rotation of the valve core 200 during movement, a first limiter 400 is provided in the receiving chamber 110, and the first limiter 400 is provided in the rod body 2 10 is provided with a second limit member 500, and the first limit member 400 and the second limit member 500 cooperate with each other to limit the rotation of the rod body 210 relative to the accommodating chamber 110 when it is active, that is, through the cooperation of the first limit member 400 and the second limit member 500, the rod body 210 can only move along its own axial direction. In this way, by limiting the rotation of the rod body 210, the self-rotation of the entire valve core 200 can be limited, and the friction between the valve core 200 and the valve cover 100 or other components on the one-way valve due to self-rotation during the movement of the one-way valve is reduced, thereby preventing abnormal noise from being generated, which is beneficial to improving the operating quality of the one-way valve and the equipment using the one-way valve and improving the user experience; in addition, reducing the friction during the movement of the valve core 200 also means reducing the wear of the valve core 200 and other components cooperating with the valve core 200, which is also beneficial to extending the service life and reliability of the one-way valve and the equipment using the one-way valve.

[0042] The specific design styles of the first limiting member 400 and the second limiting member 500 are exemplified below. Figure 1 and Figure 3In one embodiment of the utility model, the first limiting member 400 can be a limiting groove arranged on the inner side wall of the accommodating chamber 110, and the limiting groove extends from the opening of the accommodating chamber 110 to the bottom of the accommodating chamber 110 along the axial direction of the accommodating chamber 110. The shape of the cross section of the limiting groove can be flexibly set, for example, it can be rectangular or semicircular; the second limiting member 500 can be a limiting portion arranged on the rod body 210, and the limiting portion can be a protrusion integrally formed on the outer side wall of the rod body 210. The limiting portion can be arranged on the rod body 210 away from the piston portion At one end of 220, the cross-sectional shape of the limit portion can be the same as the cross-sectional shape of the limit groove, the outer circumferential size of the limit portion can be smaller than the size of the limit groove, the limit portion can be embedded in the limit groove and can slide along the extension direction of the limit groove; in this way, when the valve core 200 moves, the limit portion can form a limit with the limit groove, and since the upper limit portion in the circumferential direction of the rod body 210 cannot escape from the limit groove, the rotation of the rod body 210 in the circumferential direction can be limited, thereby achieving the effect of preventing the valve core 200 from generating noise during the movement process and reducing the wear of the valve core 200.

[0043] In order to improve the stability of the valve core 200 during movement, Figure 1 In one embodiment of the utility model, a fixing groove 211 is provided at one end of the rod body 210 , and the elastic member 300 is disposed in the accommodating cavity 110 , with one end of the elastic member 300 embedded in the fixing groove 211 and the other end abutting against the bottom of the accommodating cavity 110 . Specifically, the elastic member 300 can be arranged in the accommodating chamber 110, so that the structure of the valve core assembly can be more compact and the overall size of the valve core assembly can be further reduced; in addition, the elastic member 300 can be a compression spring, one end of which is abutted against the bottom of the accommodating chamber 110, and the other end is abutted against the end of the rod body 210. When the rod body 210 moves, it can cooperate with the bottom of the compression chamber to compress the elastic member 300; in addition, in order to ensure the stability of the position of the elastic member 300 during compression and thus ensure the stability of the movement of the rod body 210, a fixing groove 211 is also provided at the end of the rod body 210. The size of the fixing groove 211 can be adapted to the size of the elastic member 300. One end of the elastic member 300 can be embedded in the fixing groove 211 and limited by the fixing groove 211, so that the elastic member 300 is not easy to shake during the compression process, and the direction and accuracy of the spring compression are also controlled, thereby improving the stability of the rod body 210 during movement and the stability of the piston part 220 when opening and closing the valve port.

[0044] In order to make the valve core assembly smoother when opening and closing the valve port, in one embodiment of the utility model, a guide channel is provided between the valve cover 100 and the valve core 200, and the guide channel connects the outer accommodating chamber 110 with the outside. The guide channel can be a through hole opened on the valve cover 100, and the through hole connects the accommodating chamber 110. When the valve core 200 moves, the space of the accommodating chamber 110 will change. At this time, the air in the accommodating chamber 110 can enter and exit the accommodating chamber 110 through the guide channel, ensuring the air pressure balance between the accommodating chamber 110 and the outside. In this way, the resistance encountered by the valve core 200 during movement can be reduced, thereby improving the smoothness of opening and closing the valve and the opening and closing speed of the valve port of the one-way valve.

[0045] The following is an example of how to implement the diversion channel. Figure 1 In one embodiment of the utility model, the flow guide channel includes a hollow cavity 212 and a flow guide hole 213. The hollow cavity 212 is arranged at the bottom of the fixed groove 211. The flow guide hole 213 is arranged at one end of the rod body 210 away from the valve cover 100, and the flow guide hole 213 is connected with the hollow cavity 212. Specifically, the hollow cavity 212 is arranged at the bottom of the fixed groove 211, and the hollow cavity 212 extends toward the side of the piston part 220. The flow guide hole 213 is arranged on the outer wall of the end of the rod body 210 away from the valve cover 100. The flow guide hole 213 extends along the radial direction of the rod body 210 and is connected to the hollow cavity 212. In this way, when the rod body 210 moves, air can enter and exit the accommodating cavity 110 through the fixed groove 211-hollow cavity 212-flow guide hole 213, thereby improving the valve opening performance of the one-way valve.

[0046] like Figure 2 and Figure 3An embodiment of the utility model provides another implementation method of the guide channel. A cut surface 214 can be set on the outer side wall of the rod body 210. The cut surface 214 extends along the axial direction of the rod body 210 to the opposite ends of the rod body 210. In this way, the rod body 210 can be surrounded between the position of the cut surface 214 and the accommodating chamber 110 to form the above-mentioned guide channel. One end of the guide channel is connected to the accommodating chamber 110, and the other end is connected to the outside of the accommodating chamber 110. In this way, when the rod body 210 moves, air can enter and exit the accommodating chamber 110 through the channel, thereby improving the valve opening ability. In addition, since the setting of the cut surface 214 can reduce the contact area between the rod body 210 and the accommodating chamber 110, it is also beneficial to reduce the wear of the valve core 200 and the valve cover 100, thereby extending the service life of the one-way valve. In addition, the cut surface 214 can also be arranged on the side wall of the accommodating chamber 110 and extend from the bottom of the accommodating chamber 110 to the opening of the accommodating chamber 110. In this way, the above-mentioned guide channel can also be formed between the accommodating chamber 110 and the rod body 210 to achieve the exhaust function and reduce the wear of the one-way valve. In addition, it can be imagined that as long as the length of the cut surface 214 in the axial direction of the rod body 210 is greater than the movable stroke of the rod body 210 relative to the valve cover 100, it can be ensured that the guide channel formed by the cut surface 214 will not be closed when the rod body 210 is active, thereby ensuring the smoothness of the exhaust in the accommodating chamber 110.

[0047] like Figures 1 to 3 In order to improve the stability of limiting the rod body 210, in an embodiment of the utility model, at least two limiting grooves are provided, and at least two limiting grooves are arranged around the rod body 210 at intervals. At least one limiting portion is arranged in each limiting groove. By providing at least two limiting grooves and at least one limiting portion in each limiting groove, limiting can be provided for multiple positions of the rod body 210 in the circumferential direction of the rod body 210, thereby ensuring the stability of the limiting.

[0048] like Figure 1 In one embodiment of the utility model, the outer peripheral wall of the piston part 220 is provided with a conical surface part 221, and the conical surface part 221 extends obliquely in a direction away from the rod body 210. In this embodiment, a conical surface matching the conical surface part 221 is also provided at the valve port, and the conical surface is in a bell-mouth shape. The conical surface part 221 forms a surface contact with the conical surface, which ensures the sealing effect when the flow is cut off. When opening, the conical surface part 221 moves away from the conical surface along the axial direction of the rod body 210. There is no mutual friction between the two when they are separated, which is conducive to reducing the wear of the valve port and the piston part 220, thereby extending the service life of the one-way valve.

[0049] like Figure 1In one embodiment of the utility model, the conical surface portion 221 is provided with a first sealing groove 222, which extends circumferentially along the piston portion 220, and is used to assemble a sealing ring. When the piston portion 220 closes the valve port, the conical surface portion 221 abuts against the conical surface of the valve port, and the sealing ring compresses and fills the gap between the conical surface portion 221 and the valve port to achieve sealing of the valve port. At this time, the conical surface portion 221 and the conical surface of the valve port are also mutually limited, which can prevent the conical surface portion 221 from continuing to enter the valve port and cause the sealing ring to continue to be compressed. In this way, it can be ensured that the deformation of the sealing ring is not too large each time the valve port is opened and closed, thereby alleviating the fatigue damage of the sealing ring caused by overpressure, which is conducive to extending the service life of the one-way valve.

[0050] In one embodiment of the present invention, the distance between the piston portion 220 and the valve cover 100 is greater than the movable stroke of the rod body 210 relative to the valve cover 100. This ensures that when the rod body 210 reaches the maximum stroke of being compressed into the valve cover 100, the piston portion 220 will not interfere with the valve cover 100, thereby preventing the piston portion 220 from being damaged by interference from other components during movement, and ensuring the stability of the valve core 200 throughout the entire movement.

[0051] like Figure 1 In one embodiment of the utility model, the outer peripheral wall of the valve cover 100 is provided with a second sealing groove 120 extending along the circumference of the valve cover 100. The second sealing groove 120 is used to assemble a sealing ring. By arranging a sealing ring in the second sealing groove 120, the sealing performance between the valve cover 100 and the valve body can be improved when the valve cover 100 is assembled to the valve body, thereby ensuring the overall sealing performance of the one-way valve.

[0052] The utility model also proposes a one-way valve, which includes a valve body and a valve core 200 arranged on the valve body, wherein the interior of the valve body has a flow channel for fluid flow, specifically including an inlet channel, an outlet channel and a valve port connecting the inlet channel and the outlet channel, and the valve core assembly is connected to the valve body and is used to open and close the valve port. The specific structure of the valve core assembly refers to the above-mentioned embodiment. Since the one-way valve adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0053] The utility model also proposes a vehicle, which has an air-conditioning system. A one-way valve is provided on the pipeline of the air-conditioning system to make the pipeline unidirectional. The specific structure of the one-way valve refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0054] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A valve core assembly for a one-way valve, characterized in that: The valve core assembly comprises: A valve cover, used to be connected to the valve body of the one-way valve, the valve cover having an accommodating cavity, and a first limiting member is arranged in the accommodating cavity; A valve core, comprising a rod body and a piston portion disposed at one end of the rod body, the other end of the rod body being movably disposed in the accommodating cavity, an outer side wall of the rod body being provided with a second limiter, the second limiter cooperates with the first limiter to limit the rotation of the valve core; and The elastic member is arranged between the rod body and the valve cover.

2. The valve core assembly according to claim 1, characterized in that: The first limiting member is configured as a limiting groove, which is recessed in the inner wall of the accommodating cavity. The second limiting member is configured as a limiting portion, which is convexly disposed at one end of the rod body, and the limiting portion is slidably matched with the limiting groove.

3. The valve core assembly according to claim 2, characterized in that: A fixing groove is arranged at one end of the rod body, the elastic member is arranged in the accommodating cavity, one end of the elastic member is embedded in the fixing groove, and the other end abuts against the cavity bottom of the accommodating cavity.

4. The valve core assembly according to claim 3, characterized in that: A flow guide channel is provided between the valve cover and the valve core, and the flow guide channel communicates the accommodating cavity with the outside.

5. The valve core assembly according to claim 4, characterized in that: The flow guide channel includes a hollow cavity and a flow guide hole. The hollow cavity is arranged at the bottom of the fixing groove. The flow guide hole is arranged at one end of the rod body away from the valve cover. The flow guide hole is communicated with the hollow cavity.

6. The valve core assembly according to claim 4 or 5, characterized in that: The outer side wall of the rod body is provided with a section to enclose the inner side wall of the accommodating cavity to form the guide channel; and / or, the inner side wall of the accommodating cavity is provided with a section to enclose the outer side wall of the rod body to form the guide channel.

7. The valve core assembly according to claim 6, characterized in that: The cut surface extends from one end of the rod body to the other end of the rod body; or, the cut surface extends from the bottom of the accommodating cavity to the opening of the accommodating cavity.

8. The valve core assembly according to claim 6, characterized in that: The length of the section in the axial direction of the rod body is greater than the movable stroke of the rod body relative to the valve cover.

9. The valve core assembly according to claim 2, characterized in that: There are at least two limiting grooves, and at least two limiting grooves are arranged around the rod body at intervals, and at least one limiting portion is arranged in each limiting groove.

10. The valve core assembly according to claim 1, characterized in that: The outer peripheral wall of the piston part is provided with a conical surface part, and the conical surface part extends obliquely in a direction away from the rod body.

11. The valve core assembly according to claim 10, characterized in that: The conical surface portion is provided with a first sealing groove, the first sealing groove extends along the circumference of the piston portion, and the first sealing groove is used for assembling a sealing ring.

12. The valve core assembly according to claim 1, characterized in that: The distance between the piston portion and the valve cover is greater than the movable stroke of the rod body relative to the valve cover.

13. The valve core assembly according to claim 1, characterized in that: The outer peripheral wall of the valve cover is provided with a second sealing groove extending along the circumference of the valve cover, and the second sealing groove is used for assembling a sealing ring.

14. A one-way valve, characterized in that: A valve core assembly comprising any one of claims 1 to 13.

15. A vehicle, characterized in that: Includes the one-way valve described in claim 14.

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