Pneumatic control switch valve and vehicle steering adjusting system

Abstract

The utility model provides a pneumatic control switch valve and a vehicle steering adjusting system, and relates to the technical field of pneumatic control switches. The pneumatic control switch valve comprises a valve seat, the valve seat comprises a seat body and a mounting plate which are connected, the seat body is provided with a valve cavity, a first through hole, a second through hole and a third through hole, the first through hole is located between the second through hole and the mounting plate, and the second through hole is located between the first through hole and the third through hole; the valve element is slidably arranged in the valve cavity and provided with a first sealing ring, the first sealing ring is coaxially arranged at the end, close to the first through hole, of the valve element, the valve element is provided with an annular groove in the circumferential direction of the valve element, and the annular groove at least communicates with the second through hole; the protection ring is coaxially arranged in the valve cavity and close to the first through hole, the inner peripheral wall of the protection ring can make contact with the outer peripheral wall of the first sealing ring, at least part of the first through hole is exposed, and the side, close to the first sealing ring, of the protection ring is provided with a fillet structure; the elastic reset piece is coaxially arranged on the valve element and used for applying acting force to the valve element to prevent the valve element from sliding towards the protection ring. And the service life can be prolonged.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of pneumatic control switch, in particular to a pneumatic control switch valve and a vehicle steering adjustment system. BACKGROUND

[0002] In the vehicle steering adjustment system, the pneumatic control switch valve as a connecting medium of the air source and the execution cylinder plays a crucial role.

[0003] However, the service life of the existing pneumatic control switch valve needs to be improved.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] The present disclosure provides a pneumatic control switch valve and a vehicle steering adjustment system, which can improve the service life of the pneumatic control switch valve.

[0006] According to one aspect of the present disclosure, a pneumatic control switch valve is provided, comprising:

[0007] a valve seat comprising a seat body and a mounting plate connected, the seat body having a valve cavity, a first through hole, a second through hole and a third through hole, the first through hole being located between the second through hole and the mounting plate, the second through hole being located between the first through hole and the third through hole;

[0008] a valve core slidably arranged in the valve cavity and having a first sealing ring coaxially arranged at one end of the valve core close to the first through hole, the valve core being provided with an annular groove along the circumferential direction of the valve core, the annular groove being in communication with at least the second through hole;

[0009] a protective ring coaxially arranged in the valve cavity and close to the first through hole, the inner peripheral wall of the protective ring being capable of contacting the outer peripheral wall of the first sealing ring, and at least part of the first through hole being exposed, the side of the protective ring close to the first sealing ring having a rounded structure;

[0010] a resilient return member coaxially arranged in the valve core for applying a force to the valve core to resist the sliding of the valve core towards the protective ring;

[0011] The valve core has an open state and a closed state; when the valve core is in the open state, the elastic reset member is compressed, the first through hole, the annular groove and the second through hole are sequentially communicated, and the gas is sequentially discharged after entering the first through hole, the annular groove and the second through hole; when the valve core is in the closed state, the elastic reset member resets, the second through hole, the annular groove and the third through hole are sequentially communicated, and the gas is sequentially discharged after entering the second through hole, the annular groove and the third through hole.

[0012] In an embodiment of the present disclosure, the number of the first sealing rings is two, and the two first sealing rings are distributed on the same side of the annular groove along the axis of the valve core;

[0013] When the valve core is in the open state, the outer peripheral wall of the two first sealing rings is in contact with the inner peripheral wall of the protection ring; when the valve core is in the closed state, the first through hole is located between the two sealing rings.

[0014] In an embodiment of the present disclosure, the pneumatic on-off valve further comprises a button, and the button is connected to one end of the valve core extending out of the valve cavity.

[0015] In an embodiment of the present disclosure, the pneumatic on-off valve further comprises a fixed rod;

[0016] The fixed rod penetrates the valve core, the button and the seat body along the radial direction of the valve core, the seat body is provided with two opposite waist-shaped holes extending along the axis direction of the valve core, and the fixed rod penetrates the waist-shaped holes and can slide along the waist-shaped holes.

[0017] In an embodiment of the present disclosure, the elastic reset member comprises a spring, and the spring is coaxially sleeved on the valve core;

[0018] The inner side wall of one end of the valve cavity close to the button is provided with a stepped surface extending along the radial direction of the valve core, so that there is a gap between the valve core and the inner peripheral wall of one end of the valve cavity close to the button, the spring is located in the gap, one end of the spring abuts against the stepped surface, and the other end of the spring abuts against the button.

[0019] In an embodiment of the present disclosure, the button comprises a cover plate, a first convex ring and a second convex ring;

[0020] The cover plate is fixedly connected with the first convex ring and the second convex ring respectively, the first convex ring and the second convex ring are coaxial and spaced apart, an annular cavity is formed between the first convex ring and the second convex ring, and one end of the seat body away from the mounting plate can be matched with the annular cavity.

[0021] The valve core is located in the first convex ring away from one end of the first sealing ring, and abuts against the cover plate;

[0022] The first convex ring away from one side of the cover plate abuts against one end of the spring away from the stepped surface.

[0023] In an embodiment of the present disclosure, the distance between the first convex ring away from one side of the cover plate and the cover plate is greater than the distance between the second convex ring away from one side of the cover plate and the cover plate, the first convex ring has two oppositely arranged first fixing holes, the valve core has a second fixing hole, and the fixing rod can be arranged in the first fixing hole and the second fixing hole.

[0024] The end of the valve core away from the first sealing ring is provided with a protrusion, the inner wall of the first convex ring is provided with a groove, and the groove extends along the axial direction of the first convex ring; when the protrusion and the groove are in sliding fit, the axis of the first fixing hole and the axis of the second fixing hole coincide.

[0025] In an embodiment of the present disclosure, the valve core is coaxially provided with a second sealing ring, and the second sealing ring is located between the annular groove and the elastic return member.

[0026] In an embodiment of the present disclosure, the first through hole is provided with a first quick plug connector away from one end of the valve cavity.

[0027] The second through hole is provided with a second quick plug connector away from one end of the valve cavity.

[0028] According to another aspect of the present disclosure, a vehicle steering adjustment system is provided, which comprises the gas control on-off valve according to any one of the above embodiments.

[0029] The gas control on-off valve and the vehicle steering adjustment system of the present disclosure, when the valve core slides in the valve cavity, the first sealing ring can be in contact with the protection ring and the round corner structure, compared with the mode that the first sealing ring directly contacts the first through hole (the side wall of the first through hole has a sharp corner), the protection ring plays a protective role on the first sealing ring, reduces the possibility of the first sealing ring being cut by the sharp corner at the first through hole, improves the service life of the first sealing ring, and is conducive to improving the service life of the gas control on-off valve.

[0030] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure. It is apparent that the accompanying drawings are only some embodiments of the present disclosure, and other drawings can be obtained from the following description without creative effort.

[0032] Figure 1 FIG. 1 is a schematic diagram of a vehicle steering adjustment system in an embodiment of the present disclosure.

[0033] Figure 2 FIG. 2 is a schematic diagram of a pneumatic on-off valve in an embodiment of the present disclosure, intended to illustrate a state when the pneumatic on-off valve is open.

[0034] Figure 3 FIG. 3 is a schematic diagram of a pneumatic on-off valve in an embodiment of the present disclosure, intended to illustrate a state when the pneumatic on-off valve is closed.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1. air supply device; 2. pneumatic on-off valve; 21. valve seat; 211. seat body; 212. mounting plate; 213. first through hole; 214. second through hole; 215. third through hole; 216. first quick connector; 217. second quick connector; 22. valve core; 221. annular groove; 23. protection ring; 24. elastic return member; 25. first sealing ring; 26. button; 261. cover plate; 262. first protruding ring; 263. second protruding ring; 27. fixing rod; 28. second sealing ring; 3. execution cylinder; 4. steering wheel locking mechanism. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the description and drawings. It will be understood that the drawings are diagrammatic and schematic and that for purposes of illustration the elements of the drawings are not shown to scale.

[0038] The terms "one", "a", "the", "said", and "at least one" are used to denote the existence of one or more elements / components / etc.; the terms "including" and "having" are used to mean that other elements / components / etc. can be present in addition to the recited elements / components / etc.; the terms "first", "second", and "third", etc. are merely used to distinguish one element / component / etc. from another, and do not limit the number of those elements / components / etc.

[0039] The vehicle steering adjustment system provided by the embodiments of the present disclosure includes a gas source device 1, a gas control switch valve 2, an execution cylinder 3, and a steering wheel locking mechanism 4. The gas source device 1 is connected to the execution cylinder 3 through the gas control switch valve 2, so that the gas control switch valve 2 controls the execution cylinder 3 to be inflated by the gas source device 1. For example, when the gas control switch valve 2 is opened, the execution cylinder 3 can be inflated by the gas source device 1, so that the piston rod of the execution cylinder 3 drives the steering wheel locking mechanism 4 to be unlocked, thereby facilitating the user to adjust the angle of the steering wheel. When the gas control switch valve 2 is closed, the connection gas path between the gas source device 1 and the execution cylinder 3 is cut off, so that the execution cylinder 3 cannot be inflated by the gas source device 1, thereby facilitating the steering wheel locking mechanism 4 to lock the steering wheel during the deflation of the execution cylinder 3, so as to fix the steering wheel after the angle is adjusted. Figure 1

[0040] In an embodiment of the present disclosure, the gas source device 1 can be a gas pump or other type of gas source device 1.

[0041] In an embodiment of the present disclosure, referring to Figure 2 and Figure 3 , the gas control switch valve 2 includes a valve seat 21, a valve core 22, a protection ring 23, and an elastic reset member 24. The valve seat 21 includes a fixedly connected seat body 211 and a mounting plate 212. The seat body 211 has a valve cavity, a first through hole 213, a second through hole 214, and a third through hole 215. The first through hole 213 is located between the second through hole 214 and the mounting plate 212. The second through hole 214 is located between the first through hole 213 and the third through hole 215. The valve core 22 is slidably arranged in the valve cavity and has a first sealing ring 25. The first sealing ring 25 is coaxially arranged at one end of the valve core 22 close to the first through hole 213. The valve core 22 is provided with an annular groove 221 along the circumferential direction thereof. The annular groove 221 is in communication with at least the second through hole 214. The protection ring 23 is coaxially arranged in the valve cavity and close to the first through hole 213. The inner circumferential wall of the protection ring 23 can be in contact with the outer circumferential wall of the first sealing ring 25, and at least part of the first through hole 213 is exposed. The side of the protection ring 23 close to the first sealing ring 25 has a rounded structure. The elastic reset member 24 is coaxially arranged in the valve core 22 and is used to apply a force to the valve core 22 to resist the sliding of the valve core 22 towards the protection ring 23. The valve core 22 has an open state and a closed state. When the valve core 22 is in the open state, the elastic reset member 24 is compressed, the first through hole 213, the annular groove 221, and the second through hole 214 are sequentially communicated, and the gas sequentially enters the first through hole 213, the annular groove 221, and the second through hole 214 and then is discharged. When the valve core 22 is in the closed state, the elastic reset member 24 is reset, the second through hole 214, the annular groove 221, and the third through hole 215 are sequentially communicated, and the gas sequentially enters the second through hole 214, the annular groove 221, and the third through hole 215 and then is discharged. ​

[0042] Thus, when the angle of the steering wheel needs to be adjusted, referring to Figure 2 , the user can apply force to the valve core 22, so that the valve core 22 slides in the valve cavity, the first sealing ring 25 can be in contact with the protection ring 23 and the rounded structure, the elastic return member 24 is compressed, the first through hole 213, the annular groove 221 and the second through hole 214 are sequentially communicated, so that the valve core 22 is in an open state, the gas of the gas source device 1 can enter the execution cylinder 3 through the first through hole 213, the annular groove 221 and the second through hole 214 in sequence, drive the piston rod of the execution cylinder 3 to drive the steering wheel locking mechanism 4 to unlock, so as to facilitate the user to adjust the angle of the steering wheel. When the angle of the steering wheel needs to be fixed, referring to Figure 3 , the user can not apply force to the valve core 22, the elastic return member 24 pushes the valve core 22 to slide in the valve cavity until the valve core 22 is reset, the first sealing ring 25 can be in contact with the protection ring 23 and the rounded structure, the second through hole 214, the annular groove 221 and the third through hole 215 are sequentially communicated, so that the valve core 22 is in a closed state, the gas circuit of the execution cylinder 3 is cut off, the gas of the execution cylinder 3 can be discharged through the second through hole 214, the annular groove 221 and the third through hole 215 in sequence, the piston rod of the execution cylinder 3 drives the steering wheel locking mechanism 4 to lock the steering wheel, so as to facilitate the user to fix the angle of the steering wheel.

[0043] In an embodiment of the present disclosure, when the valve core 22 slides in the valve cavity, the first sealing ring 25 can be in contact with the protection ring 23 and the rounded structure, compared with the mode that the first sealing ring 25 is directly in contact with the first through hole 213 (the side wall of the first through hole 213 has an acute angle), the protection ring 23 plays a protective role on the first sealing ring 25, reduces the possibility that the first sealing ring 25 is cut by the acute angle at the first through hole 213, improves the service life of the first sealing ring 25, and is beneficial to improve the service life of the gas control on-off valve 2.

[0044] In an embodiment of the present disclosure, the seat body 211 and the mounting plate 212 can be integrally formed. A plurality of mounting holes can be provided on the mounting plate 212, for example, the number of mounting holes can be two, three, four, etc., and bolts can be provided in the mounting holes to achieve the installation of the valve seat 21.

[0045] In an embodiment of the present disclosure, the seat body 211 is inclined, that is, the included angle between the mounting plate 212 and the seat body 211 can be an acute angle. For example, the angle of the included angle between the mounting plate 212 and the seat body 211 can be 45°, 60°, 70°, 75°, etc., so as to facilitate the user to step on the gas control on-off valve 2.

[0046] In an embodiment of the present disclosure, the valve cavity can run through the valve seat 21 along the axial direction of the valve core 22. The protection ring 23 is in interference fit and sealed with the valve cavity, and the protection ring 23 is located at one end of the valve cavity close to the mounting plate 212. An air gap is left between the protection ring 23 and the first through hole 213 to facilitate the gas entering from the first through hole 213.

[0047] In an embodiment of the present disclosure, referring to Figure 2 , the axes of the first through hole 213, the second through hole 214, and the third through hole 215 are located in the same plane, the axis of the first through hole 213 is parallel to the axis of the second through hole 214, the axis of the third through hole 215 intersects the axis of the first through hole 213, the first through hole 213 extends to one side of the seat body 211, the third through hole 215 extends to the other side of the seat body 211, the first through hole 213 and the second through hole 214 are located on the same side of the seat body 211, and along the axial direction of the valve core 22, the third through hole 215, the second through hole 214, the first through hole 213, and the mounting plate 212 are sequentially distributed.

[0048] In an embodiment of the present disclosure, referring to Figure 2 , the number of the first sealing rings 25 is two, and the two first sealing rings 25 are distributed on the same side of the annular groove 221 along the axial direction of the valve core 22. The outer diameter of the first sealing ring 25 is slightly larger than the maximum outer diameter of the valve core 22, which can improve the sealing performance. When the valve core 22 is in the open state, the outer peripheral wall of the two first sealing rings 25 is in contact with the inner peripheral wall of the protection ring 23, which prevents the gas in the first through hole 213 from leaking from one end of the valve cavity close to the mounting plate 212, and improves the sealing performance through the two first sealing rings 25, which is beneficial to improve the air intake efficiency of the execution cylinder 3 and improve the response speed of the pneumatic on-off valve 2; when the valve core 22 is in the closed state, the first through hole 213 is located between the two sealing rings, which prevents the gas in the first through hole 213 from entering the annular groove 221 and one end of the valve cavity close to the mounting plate 212, and further improves the sealing performance.

[0049] In an embodiment of the present disclosure, referring to Figure 2 , the first through hole 213 is provided with a first quick plug connector 216 away from one end of the valve cavity, and the gas source device 1 is connected with the first quick plug connector 216. The second through hole 214 is provided with a second quick plug connector 217 away from one end of the valve cavity, and the execution cylinder 3 is connected with the second quick plug connector 217.

[0050] In an embodiment of the present disclosure, referring to Figure 2 , the pneumatic on-off valve 2 further comprises a button 26. The button 26 is detachably connected with one end of the valve core 22 extending out of the valve cavity. In this way, the user can push the valve core 22 to move by stepping on the button 26.

[0051] In an embodiment of the present disclosure, referring toFigure 2 The button 26 comprises a cover plate 261, a first convex ring 262 and a second convex ring 263. The cover plate 261 can be a circular plate structure, and the cover plate 261 is fixedly connected with the first convex ring 262 and the second convex ring 263 by welding or one-piece forming. The side of the cover plate 261 away from the first convex ring 262 can be provided with anti-skid lines to prevent slipping when the user steps on it. The first convex ring 262 and the second convex ring 263 are coaxial and spaced apart, and an annular cavity is formed between the first convex ring 262 and the second convex ring 263. The end of the seat body 211 away from the mounting plate 212 can extend into the annular cavity and cooperate with the annular cavity. The end of the valve core 22 away from the first sealing ring 25 is located in the first convex ring 262 and abuts against the cover plate 261. In this way, the button 26, the seat body 211 and the valve core 22 can be matched through the first convex ring 262 and the second convex ring 263, facilitating the installation of the button 26.

[0052] In an embodiment of the present disclosure, referring to Figure 2 The pneumatic switch valve 2 further comprises a fixing rod 27, which can be a pin. The fixing rod 27 penetrates the valve core 22, the button 26 and the seat body 211 along the radial direction of the valve core 22. The seat body 211 is provided with two opposite waist-shaped holes extending along the axis direction of the valve core 22, and the fixing rod 27 passes through the waist-shaped holes and can slide along the waist-shaped holes. In this way, the installation, the valve core 22 and the seat body 211 can be connected through the fixing rod 27, facilitating the installation and removal of the button 26.

[0053] In an embodiment of the present disclosure, referring to Figure 2 The elastic return member 24 comprises a spring coaxially sleeved on the valve core 22. The inner side wall of the end of the valve cavity close to the button 26 is provided with a stepped surface extending along the radial direction of the valve core 22, so that there is a gap between the valve core 22 and the inner peripheral wall of the end of the valve cavity close to the button 26. The stepped surface is annular, and the spring is located in the gap and abuts against the stepped surface at one end and the side of the first convex ring 262 away from the cover plate 261 at the other end. In this way, the elastic return member 24 is limited by the stepped surface and the first convex ring 262. In addition, the gas of the gas source device 1 and the gas of the execution cylinder 3 do not contact the elastic return member 24, which can reduce the influence between the gas and the elastic return member 24. For example, the gas in the gas source device 1 can cause the elastic return member 24 to rust, or impurities in the gas adhere to the elastic return member 24, affecting the performance of the elastic return member 24.

[0054] In an embodiment of the present disclosure, referring to Figure 2The distance between the first convex ring 262 and the cover plate 261 is greater than the distance between the second convex ring 263 and the cover plate 261. The first convex ring 262 has two first fixing holes arranged oppositely, and the valve core 22 has a second fixing hole, and the fixing rod 27 can be arranged in the first fixing hole and the second fixing hole. The end of the valve core 22 away from the first sealing ring 25 is provided with a protrusion, and the inner wall of the first convex ring 262 is provided with a groove extending along the axial direction of the first convex ring 262; when the protrusion and the groove are in sliding fit, the axis of the first fixing hole and the axis of the second fixing hole coincide. In this way, by matching the protrusion with the groove, the first fixing hole and the second fixing hole are aligned, and then the fixing rod 27 passes through the first fixing hole and the second fixing hole to fix and connect the button 26 and the valve core 22, thereby improving the installation efficiency.

[0055] In an embodiment of the present disclosure, referring to Figure 2 The valve core 22 is coaxially provided with a second sealing ring 28, and the second sealing ring 28 is located between the annular groove 221 and the elastic reset member 24. In this way, the second sealing ring 28 can prevent gas from leaking from the end of the valve cavity close to the button 26, further improving the sealing performance.

[0056] Other embodiments of the present disclosure will be apparent to those skilled in the art after consideration of the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptive changes of the present disclosure following the general principles of the present disclosure and including common knowledge or conventional technical means in the art not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A gas control on-off valve characterized by, The gas control switch valve comprises: a valve seat comprising a connected seat body and a mounting plate, the seat body having a valve cavity, a first through hole, a second through hole and a third through hole, the first through hole being located between the second through hole and the mounting plate, and the second through hole being located between the first through hole and the third through hole; a valve core slidably arranged in the valve cavity and having a first sealing ring coaxially arranged at one end of the valve core close to the first through hole, the valve core being provided with an annular groove along the circumferential direction of the valve core, the annular groove being in communication with at least the second through hole; a protection ring coaxially arranged in the valve cavity and close to the first through hole, the inner peripheral wall of the protection ring being capable of being in contact with the outer peripheral wall of the first sealing ring and exposing at least part of the first through hole, and the side of the protection ring close to the first sealing ring having a round corner structure; a resilient reset member coaxially arranged in the valve core for applying a force to the valve core to resist the sliding of the valve core to the protection ring; wherein the valve core has an open state and a closed state; when the valve core is in the open state, the resilient reset member is compressed, the first through hole, the annular groove and the second through hole are sequentially communicated, and gas sequentially enters the first through hole, the annular groove and the second through hole and is then discharged; when the valve core is in the closed state, the resilient reset member is reset, the second through hole, the annular groove and the third through hole are sequentially communicated, and gas sequentially enters the second through hole, the annular groove and the third through hole and is then discharged.

2. The gas control on-off valve according to claim 1, wherein The number of the first sealing rings is two, and the two first sealing rings are distributed on the same side of the annular groove along the axis of the valve core; when the valve core is in the open state, the outer peripheral walls of the two first sealing rings are in contact with the inner peripheral wall of the protection ring; when the valve core is in the closed state, the first through hole is located between the two sealing rings.

3. The gas control on-off valve according to claim 1, wherein The gas control switch valve further comprises a button connected with one end of the valve core protruding out of the valve cavity.

4. The gas control on-off valve according to claim 3, wherein The gas control switch valve further comprises a fixed rod; the fixed rod penetrates the valve core, the button and the seat body along the radial direction of the valve core, the seat body is provided with two opposite waist-shaped holes extending along the axis of the valve core, and the fixed rod penetrates the waist-shaped holes and can slide along the waist-shaped holes.

5. The gas control on-off valve according to claim 4, wherein The resilient reset member comprises a spring coaxially sleeved on the valve core; a step surface is arranged on the inner side wall of one end of the valve cavity close to the button, the step surface extends along the radial direction of the valve core, so that there is a gap between the valve core and the inner peripheral wall of one end of the valve cavity close to the button, the spring is located in the gap, one end of the spring abuts against the step surface, and the other end of the spring abuts against the button.

6. The gas control on-off valve according to claim 5, wherein The button comprises a cover plate, a first convex ring and a second convex ring; wherein the cover plate is fixedly connected with the first convex ring and the second convex ring, the first convex ring and the second convex ring are coaxially and spacedly arranged, an annular cavity is formed between the first convex ring and the second convex ring, and one end of the seat body away from the mounting plate can be matched with the annular cavity; one end of the valve core away from the first sealing ring is located in the first convex ring and abuts against the cover plate; The first convex ring is in abutment with one end of the spring away from the step surface.

7. The gas control on-off valve according to claim 6, wherein The distance between the first convex ring away from the cover plate and the cover plate is greater than the distance between the second convex ring away from the cover plate and the cover plate, the first convex ring has two first fixing holes arranged oppositely, the valve core has a second fixing hole, and the fixing rod can be arranged in the first fixing hole and the second fixing hole. The end of the valve core away from the first sealing ring is provided with a protrusion, the inner wall of the first convex ring is provided with a groove, and the groove extends along the axial direction of the first convex ring; when the protrusion is in sliding fit with the groove, the axis of the first fixing hole and the axis of the second fixing hole are coincident.

8. The gas control on-off valve according to claim 1, wherein The valve core is coaxially provided with a second sealing ring, and the second sealing ring is located between the annular groove and the elastic reset member.

9. The gas control on-off valve according to any one of claims 1 to 8, characterized by The first through hole is provided with a first quick plug connector at one end away from the valve cavity. The second through hole is provided with a second quick plug connector at one end away from the valve cavity.

10. A vehicle steering adjustment system characterized by, The pneumatic control on-off valve comprises the air control on-off valve according to any one of claims 1-9.

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