CN217634031U - Automobile seat height adjusting valve - Google Patents

Abstract

The utility model discloses a car seat height adjusting valve belongs to pneumatic valve technical field. The air inlet valve, the air outlet valve and the air inlet and outlet cam are hinged to the upper portion of the base, and an air inlet pressure rod, an air outlet pressure rod and an air outlet pressure rod which are hinged to the normally closed air inlet valve, the three-way air inlet and outlet valve and the normally closed air outlet valve are respectively installed on the normally closed air inlet valve, the three-way air inlet and outlet valve and the normally closed air outlet valve and used for pressing the corresponding valve rods. Through filling and discharging the valve integration with normal close inlet valve, normal close exhaust valve, tee bend and make up into car seat altitude mixture control valve, both easy to assemble can be through the convenient regulation of advancing the exhaust of advancing exhaust cam again, can also fill through the tee bend and discharge the valve and realize swift gassing function.

Description

Automobile seat height adjusting valve

Technical Field

The utility model relates to a car seat height control valve belongs to pneumatic valve technical field.

Background

Through car seat height adjusting device can provide suitable seat height for the people of various different sizes for it is more comfortable to take experience. There are many ways to adjust the height of the car seat, including manual adjustment, electric adjustment, pneumatic adjustment, etc. The manual adjustment mode, through mechanical linkage mode, rise the seat step by step, this kind of mode is more laborious, and is difficult to operate. The electric adjustment mode is that the height of the seat is adjusted by the control circuit and the motor-driven lifting device, the adjustment is very convenient, but the seat cannot absorb shock, and the vehicle is driven to bump. The pneumatic adjusting mode corresponds to an automobile seat supported by an air suspension type air bag, and the inflation and deflation of the air bag (air bin) are controlled by a seat height adjusting valve, so that a more comfortable adjustable seat is provided for drivers and passengers.

At present, an air suspension type automobile seat realizes the air inflation and deflation function through an independent inflation valve and an air deflation valve. However, the installation and the operation of the existing inflation and deflation valve are not convenient enough, the air passages are required to be independently connected with a plurality of valve bodies, the occupied space is occupied, and the function of adjusting the height of the seat can be realized by controlling each valve body in a combined mode. In order to facilitate the operation and reduce the connecting air pipe, the automobile seat height adjusting valve is designed, integrates a plurality of functions into a whole, is convenient to operate, can rapidly and repeatedly control the inflation and deflation of the air bag according to the requirement, and can rapidly realize the one-key deflation function.

Disclosure of Invention

The utility model aims to solve the technical problem that: the utility model provides a car seat altitude mixture control valve, it has solved present seat altitude mixture control pneumatic valve and has adopted a plurality of independent pneumatic valves, and installation and operation are all inconvenient problem.

The utility model discloses the technical problem that solve takes following technical scheme to realize:

a height adjusting valve for an automobile seat comprises a base, wherein the base is used for fixing a height adjusting valve on a used position on one hand, and is used for fixing a normally closed air inlet valve, a normally closed exhaust valve and a three-way air charging and discharging valve together on the other hand, the normally closed air inlet valve and the normally closed exhaust valve are both provided with an air inlet end and an air outlet end, the on-off between the air inlet end and the air outlet end is controlled through a valve rod, the initial state of the valve rod is a natural extension state, at the moment, the normally closed air inlet valve and the normally closed exhaust valve are both in a normally closed state, when the valve rod is pressed downwards, the normally closed air inlet valve and the normally closed exhaust valve are gradually converted into an open state, the three-way air charging and discharging valve is provided with an air charging end, an air discharging end and an air bag end, the air charging and discharging cam is hinged to the upper part of the base, and an air inlet pressure rod, a charging and discharging pressure rod and a discharging pressure rod which are respectively hinged to the normally closed air inlet valve, the three-way air charging and discharging valve and the normally closed valve;

the air inlet end of the normally closed air inlet valve is connected with high-pressure air, and the air outlet end of the normally closed air inlet valve is respectively communicated with the air charging end of the three-way air charging and discharging valve and the air inlet end of the normally closed exhaust valve;

the air inlet pressure rod and the air exhaust pressure rod are respectively positioned on a positive and negative rotating path of the air inlet and exhaust cam, the air inlet and exhaust cam is positioned at a position where the air inlet pressure rod and the air exhaust pressure rod cannot be triggered to press down in an initial state, and the air inlet pressure rod and the air exhaust pressure rod are respectively triggered to press down when the air inlet and exhaust cam rotates positively and negatively;

the end part of the inflation and deflation air pressure rod is connected with the base through the tension spring, the tension spring enables the inflation and deflation air pressure rod to press the valve rod of the three-way inflation and deflation valve in an initial state, so that the inflation end of the three-way inflation and deflation valve is communicated with the air bag end, and when external force overcomes the tension of the tension spring, the valve rod of the three-way inflation and deflation valve is restored to be in an extended state to enable the deflation end of the three-way inflation and deflation valve to be communicated with the air bag end.

In a preferred example, the intake and exhaust cam is provided with an intake lug and an exhaust lug side by side, the normally closed intake valve and the normally closed exhaust valve are provided side by side, the intake pressure lever is located on a rotation path of the intake lug in the forward rotation, and the exhaust pressure lever is located on a rotation path of the exhaust lug in the reverse rotation.

As a preferable example, the exhaust pressure bar is an arc-shaped bar, gear grooves from deep to shallow are sequentially arranged on the inner surface of the arc-shaped bar, the exhaust convex block adopts a V-shaped bulge matched with the gear grooves, and the valve rod of the normally closed exhaust valve is pressed to a greater degree in the process that the intake and exhaust cam rotates from the initial deep gear groove to the shallow gear groove.

In a preferred embodiment, the end of the charging and discharging air pressure rod is provided with a hook for pulling by external force. The pothook is connected with the external drawing part, and the function of quick air release can be realized by manually triggering the drawing part.

As a preferable example, a torsion spring is arranged at the hinged joint of the air inlet and outlet cam and the base, and when no external force is applied, the torsion spring automatically restores the air inlet and outlet cam to a position where the normally closed air inlet valve and the normally closed air outlet valve are not triggered to act. Through the torsion spring, the air inlet and outlet cam can be automatically restored to the initial position.

As a preferable example, the air inlet and outlet cam is provided with an arc-shaped rack for driving the air inlet and outlet cam to rotate. The arc rack can be meshed with a gear of the manual poke rod, and the normally closed air inlet valve and the normally closed exhaust valve are triggered in a manual mode. The arc rack can also be meshed with a transmission gear driven by a motor, and a hardware basis is provided for automatically controlling the opening of the normally closed air inlet valve and the normally closed exhaust valve. Manual and automatic control modes can also be set simultaneously.

The utility model has the advantages that:

(1) The air inlet pressure rod is pressed through the rotation of the air inlet and outlet cam, the normally closed air inlet valve is pressed and opened, external high-pressure air is communicated with the air inflation end of the three-way air inflation and exhaust valve, and the air bag is inflated through the air bag end of the three-way air inflation and exhaust valve;

(2) The air bag is reversely rotated by the air inlet and outlet cam to press the air outlet pressure rod, the normally closed air outlet valve is pressed and opened, and air in the air bag is communicated with the inside of the normally closed air outlet valve through the three-way air inlet and outlet valve and is discharged by the normally closed air outlet valve;

(3) By drawing the three-way inflation and deflation valve, gas in the air bag is discharged from the deflation end of the three-way inflation and deflation valve;

(4) Through filling and discharging the valve integration with normal close inlet valve, normal close exhaust valve, tee bend and make up into car seat altitude mixture control valve, both easy to assemble can be through the convenient regulation of advancing the exhaust of advancing exhaust cam again, can also fill through the tee bend and discharge the valve and realize swift gassing function.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the present invention located on one side of the normally closed intake valve;

FIG. 3 is a schematic structural diagram of the front of three valves and three pressing bars in the present invention;

FIG. 4 is a schematic bottom structure view of three valves and three pressing bars in the present invention;

fig. 5 is a schematic structural view of the back of three valves and three pressing bars in the present invention;

FIG. 6 is a schematic structural diagram of an intake and exhaust cam;

FIG. 7 is a schematic structural view of the intake and exhaust cams pressing the intake pressure lever;

FIG. 8 is a schematic structural view of the intake and exhaust cams pressing the exhaust rod;

FIG. 9 is a schematic view of the structure of the three-way inflation/deflation valve pressed by the inflation/deflation pressure bar in the initial state;

fig. 10 is a schematic view of the explosion structure of three valves and three pressing bars in the present invention;

FIG. 11 is a schematic view of the internal structure of the normally closed intake valve and the three-way valve when the air bag is in an intake state;

FIG. 12 is a schematic view showing the internal structure of the normally closed intake valve released and the three-way inflation/deflation valve pulled in the rapid deflation state of the air bag;

FIG. 13 is a schematic view showing the internal structure of the normally closed exhaust valve pressed when the airbag is in an exhaust state.

In the figure: 1. a base; 2. a normally closed intake valve; 201. a first valve body; 202. a first lower top extension spring; 203. a first sealing piston; 204. a first stepped valve stem; 205. a first upper jacking spring; 206. a first bonnet; 207. a first valve stem chamber; 208. a first gas conduction chamber; 209. a first piston chamber; 210. a connecting pipe; 211. a first gas pipe joint; 212. an air inlet; 3. a normally closed exhaust valve; 301. a second valve body; 302. a second lower jacking spring; 303. a second sealing piston; 304. a second stepped valve stem; 305. a second upper jacking spring; 306. a second bonnet; 307. a second valve stem chamber; 308. a second gas conduction chamber; 309. a second piston chamber; 310. a second air pipe joint; 4. a three-way inflation and deflation valve; 401. an inflation end; 402. a gas discharge end; 403. an air bag end; 404. a third valve body; 405. a third lower top extension spring; 406. a third seal piston; 407. a third stepped valve stem; 408. a third upward urging spring; 409. a third bonnet; 410. a hollow air bleed passage; 411. air bleeding holes; 412. a third valve rod chamber; 413. a third air guide chamber; 414. a third piston chamber; 415. a third air pipe joint; 5. an intake cam and an exhaust cam; 501. an air intake bump; 502. an exhaust bump; 503. an arc-shaped rack; 6. an air inlet pressure lever; 7. a pressure charging and discharging rod; 701. a hook; 8. an exhaust pressure rod; 801. a gear groove; 9. a tension spring; 10. a seal ring; 11. a gasket; 12. a sealing plug; 13. a screw; 14. a torsion spring.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention will be further described with reference to the following embodiments.

Example 1

As shown in fig. 1-10, an automobile seat height adjusting valve comprises a base 1, wherein the base 1 is used for fixing a height adjusting valve at a used position on one hand, and is used for fixing a normally closed intake valve 2, a normally closed exhaust valve 3 and a three-way inflation and deflation valve 4 together on the other hand, the normally closed intake valve 2 and the normally closed exhaust valve 3 are both provided with an intake end and an exhaust end, and the on-off state is controlled by a valve rod between the intake end and the exhaust end, wherein the valve rod initial state is a natural extension state, at the moment, the normally closed intake valve 2 and the normally closed exhaust valve 3 are both in a normally closed state, when the valve rod is pressed downwards, the normally closed intake valve 2 and the normally closed exhaust valve 3 are gradually converted into an open state, the three-way inflation and deflation valve 4 is provided with an inflation end 401, an exhaust end 402 and a gas bag end 403, and further comprises an intake and exhaust cam 5 hinged on the upper part of the base 1, and an intake pressure lever 6, an inflation pressure rod 7 and an exhaust pressure rod 8 which are respectively hinged and normally closed on the intake valve 2, the three-way inflation and deflation valve 4 and the normally closed exhaust valve 3 and are used for pressing the corresponding valve;

the air inlet end of the normally closed air inlet valve 2 is connected with high-pressure air, and the air outlet end of the normally closed air inlet valve 2 is respectively communicated with the air charging end 401 of the three-way air charging and discharging valve 4 and the air inlet end of the normally closed exhaust valve 3;

the air inlet pressure rod 6 and the air exhaust pressure rod 8 are respectively positioned on a positive and negative rotating path of the air inlet and exhaust cam 5, the air inlet and exhaust cam 5 is positioned at a position which can not trigger the air inlet pressure rod 6 and the air exhaust pressure rod 8 to press down in an initial state, and when the air inlet and exhaust cam 5 rotates positively and negatively, the air inlet pressure rod 6 and the air exhaust pressure rod 8 are respectively triggered to press down;

the end part of the inflation and deflation pressure rod 7 is connected with the base 1 through the tension spring 9, in an initial state, the tension spring 9 enables the inflation and deflation pressure rod 7 to press the valve rod of the three-way inflation and deflation valve 4, so that the inflation end 401 of the three-way inflation and deflation valve 4 is communicated with the air bag end 403, when external force overcomes the tension of the tension spring 9, the valve rod of the three-way inflation and deflation valve 4 is recovered to extend to a natural state, and the deflation end 402 of the three-way inflation and deflation valve 4 is communicated with the air bag end 403.

The end of the inflation/deflation pressure bar 7 is provided with a hook 701 for pulling by external force. The clamping hook 701 is connected with an external drawing piece, and the function of quick air release can be realized by manually triggering the drawing piece.

The normally closed air inlet valve 2, the normally closed exhaust valve 3 and the three-way air charging and discharging valve 4 can adopt commercially available products with the same functions, and can also adopt the following structures:

the normally closed intake valve 2 comprises a first valve body 201, a first downward jacking spring 202, a first sealing piston 203, a first step valve rod 204 (equivalent to the valve rod of the normally closed intake valve 2 in the foregoing), a first upward jacking spring 205, a first valve cap 206, a sealing ring 10 and a gasket 11, wherein a first valve rod chamber 207, a first air guide chamber 208 and a first piston chamber 209 are arranged inside the first valve body 201, the first step valve rod 204 is inserted into the first valve rod chamber 207 from the top, the upper opening of the first valve rod chamber 207 is sealed by the first valve cap 206, the upper portion of the first step valve rod 204 penetrates through the first valve cap 206 to be in contact with the intake pressure rod 6, the step portion of the first step valve rod 204 is limited below the first valve cap 206, the sealing ring 10, the gasket 11 and the first upward jacking spring 205 are sequentially sleeved at the lower end of the first step valve rod 204 from the bottom to the top, dynamic sealing is realized between the first valve rod chamber 207 by the sealing ring 10, and the first upward jacking spring 205 keeps the normally closed valve rod 204 in an initial state. An air outlet end is arranged on one side of the first air guide chamber 208, and the air outlet end is provided with a connecting pipe 210 communicated with an air inlet end 401 of the three-way air charging and discharging valve 4 and an air inlet end of the normally closed exhaust valve 3. The first piston chamber 209 is provided with an air inlet end (the air inlet end adopts a first air pipe joint 211), a first downward jacking spring 202 and a first sealing piston 203 from bottom to top in sequence, and the first downward jacking spring 202 tightly supports the first sealing piston 203 against the opening at the lower end of the first air guide chamber 208. In the initial state, the lower opening of the first air guide chamber 208 is sealed by the first sealing piston 203, forming a normally closed intake valve 2. When the air inlet pressure lever 6 presses the first step valve rod 204 downwards, the lower end of the first step valve rod 204 pushes the first sealing piston 203 downwards, the lower end opening of the first air guide chamber 208 is opened, and at the moment, the air inlet end of the normally closed air inlet valve 2 is communicated with the air outlet end on one side of the first air guide chamber 208.

The normally closed exhaust valve 3 includes a second valve body 301, a second lower pushing spring 302, a second sealing piston 303, a second stepped valve rod 304 (equivalent to the valve rod of the normally closed exhaust valve 3), a second upper pushing spring 305, a second valve cap 306, a sealing ring 10, a gasket 11, and a sealing plug 12, wherein a second valve rod chamber 307, a second air guide chamber 308, and a second piston chamber 309 are disposed inside the second valve body 301 and penetrate from top to bottom, the second stepped valve rod 304 is inserted into the second valve rod chamber 307 from above, an upper opening of the second valve rod chamber 307 is sealed by the second valve cap 306, an upper portion of the second stepped valve rod 304 penetrates through the second valve cap 306 to contact the exhaust valve 8, a stepped portion of the second stepped valve rod 304 is limited below the second valve cap 306, the lower end of the second stepped valve rod 304 is sleeved with the sealing ring 10, the gasket 11, and the second upper pushing spring 305 in sequence from bottom to top, dynamic sealing is achieved between the second valve rod and the second valve rod chamber 307 by the sealing ring 10, and in an initial state, the second upper pushing spring 305 pushes the second stepped valve rod 304 upwards, and maintains a normally closed state. An air outlet end is arranged at one side of the second air guide chamber 308 (the air outlet end adopts a second air pipe joint 310 which is laterally connected, and the second air pipe joint 310 can be connected with an exhaust silencer). The second piston chamber 309 is sequentially provided with a sealing plug 12, a second lower top-extending spring 302 and a second sealing piston 303 from bottom to top, the sealing plug 12 seals the bottom of the second piston chamber 309, the second lower top-extending spring 302 tightly abuts the second sealing piston 303 against an opening at the lower end of the second air guide chamber 308, one side of the upper portion of the second piston chamber 309 is provided with an air inlet end (namely an air inlet 212 of the side wall of the connecting pipe 210 in the figure), and the air inlet end of the normally closed exhaust valve 3 is communicated with the air outlet end of the normally closed intake valve 2 through the air inlet 212 of the side wall of the connecting pipe 210. In the initial state, the lower opening of the second air guide chamber 308 of the normally closed exhaust valve 3 is sealed by the second sealing piston 303, so that the normally closed exhaust valve 3 is formed. When the exhaust pressure lever 8 presses the second stepped valve rod 304 downward, the lower end of the second stepped valve rod 304 pushes the second sealing piston 303 downward, the lower end opening of the second air guide chamber 308 is opened, and at this time, the air inlet end of the normally closed exhaust valve 3 is communicated with the air outlet end on one side of the second air guide chamber 308.

The three-way inflation and deflation valve 4 comprises a third valve body 404, a third lower top extension spring 405, a third sealing piston 406, a third step valve rod 407 (equivalent to the valve rod of the three-way inflation and deflation valve 4), a third upper top extension spring 408, a third valve cap 409, a sealing ring 10, a gasket 11 and a sealing plug 12, wherein a hollow deflation passage 410 with an open bottom end is arranged inside the third step valve rod 407, a deflation end 402 (an air release hole 411 in the figure) communicated with the upper part of the hollow deflation passage 410 is arranged on the upper part of the third step valve rod 407, a third valve rod chamber 412, a third air guide chamber 413 and a third piston chamber 414 which penetrate through the third valve rod chamber from top to bottom are arranged inside the third valve body 404, the third step valve rod 407 is inserted into the third valve rod chamber 412 from top, the opening on the third valve rod chamber 412 is sealed by the third valve cap, the upper part of the third step valve rod 407 penetrates through the third valve cap 409 to be contacted with the air pressure rod 7, the step part of the third step valve rod 407 is limited below the third step cap 409, the third step valve rod 407 is sleeved with the third sealing ring 10, the upper sealing ring 11 and the third step valve rod 408, and the third valve rod chamber is sealed by the third step spring 408. In the initial state, the third upward biasing spring 408 biases the third stepped stem 407 upward, and the vent hole 411 exposes the third valve cap 409. An air bag end 403 is arranged at one side of the third air guide chamber 413 (the air bag end 403 adopts a side-connected third air pipe joint 415, and the third air pipe joint 415 is connected with the automobile seat height adjusting air bag). An inflation end 401 is arranged on one side of the lower portion of the third piston chamber 414, the inflation end 401 is connected with the end portion of the connecting pipe 210 in a sealing mode through a sealing ring 10, a sealing plug 12, a third lower jacking spring 405 and a third sealing piston 406 are sequentially arranged on the third piston chamber 414 from bottom to top, the bottom of the third piston chamber 414 is sealed through the sealing plug 12, the third lower jacking spring 405 tightly abuts against the third sealing piston 406 at an opening at the lower end of a third air guide chamber 413, and the inflation end 401 of the three-way inflation and deflation valve 4 is communicated with an air outlet end of the normally closed air inlet valve 2 through the connecting pipe 210. In the initial state, the lower opening of the third gas guiding chamber 413 of the three-way inflation/deflation valve 4 is sealed by the third sealing piston 406, and the gas at the gas bag end 403 enters the hollow deflation channel 410 through the bottom opening of the third step valve rod 407 and is rapidly released from the deflation end 402. When the inflation/deflation pressure lever 7 presses the third step valve rod 407 downwards, the lower end of the third step valve rod 407 pushes the third sealing piston 406 downwards, the lower end opening of the third gas guide chamber 413 is open, the bottom end opening of the third step valve rod 407 is closed by the third sealing piston 406, and at this time, the inflation end 401 of the three-way inflation/deflation valve 4 is communicated with the gas bag end 403 on one side of the third gas guide chamber 413 to inflate the gas bag.

The valve bodies of the normally closed air inlet valve 2 and the normally closed air exhaust valve 3 adopt an integrated structure, and the normally closed air inlet valve 2 is hermetically connected with an air charging end 401 of the three-way air charging and discharging valve 4 through a connecting pipe 210. The normally closed air inlet valve 2 and the normally closed exhaust valve 3 are positioned on one side of the base 1, the three-way air charging and discharging valve 4 is positioned on the other side of the base 1, and the three are fixed through screws 13.

The working principle is as follows:

as shown in fig. 11-13, in the initial state, the air intake and exhaust cam 5 does not trigger the air intake pressure lever 6 and the exhaust pressure lever 8 to press down, and the tension spring 9 pulls down the air charge and exhaust pressure lever 7 to press down the valve rod of the three-way air charge and exhaust valve 4. At this time, the valve rods (the first step valve rod 204 and the second step valve rod 304) of the normally closed intake valve 2 and the normally closed exhaust valve 3 extend upwards, and the valves are in a closed state; the valve rod (third step valve rod 407) of the three-way inflation and deflation valve 4 is pressed down by the inflation and deflation pressure rod 7, and the inflation end 401 of the three-way inflation and deflation valve 4 is communicated with the air bag end 403.

a. Air inlet of the air bag: in fig. 1, the intake and exhaust cam 5 is driven to rotate forward (rotate clockwise), the intake and exhaust cam 5 triggers the intake pressure lever 6, the intake pressure lever 6 presses the valve rod (the first step valve rod 204) of the normally closed intake valve 2 downward, at this time, the intake end and the exhaust end of the normally closed intake valve 2 are communicated, high-pressure gas enters from the intake end of the normally closed intake valve 2 and enters the inflation end 401 of the three-way inflation and exhaust valve 4 through the connecting pipe 210, and at this time, the inflation end 401 and the air bag end 403 of the three-way inflation and exhaust valve 4 are communicated to inflate the air bag.

b. Air bag exhausting: in fig. 1, the intake and exhaust cam 5 is driven to rotate reversely (rotate counterclockwise), the intake and exhaust cam 5 triggers the exhaust pressure rod 8, the exhaust pressure rod 8 presses the valve rod (second step valve rod 304) of the normally closed exhaust valve 3 downward, at this time, the intake end and the exhaust end of the normally closed exhaust valve 3 are communicated, at this time, the inflation end 401 and the air bag end 403 of the three-way intake and exhaust valve 4 are also in a communicated state, air in the air bag enters the connecting pipe 210 from the inflation end 401 of the three-way intake and exhaust valve 4, enters the normally closed exhaust valve 3 through the air inlet 212 on the connecting pipe 210, and is exhausted through the exhaust end of the normally closed exhaust valve 3, the exhaust end of the normally closed exhaust valve 3 is generally processed by a silencing structure, the exhaust is relatively slow, and is relatively suitable for slow adjustment and is not suitable for fast exhaust.

The seat height can be adjusted to be more appropriate by repeatedly operating the steps a and b.

c. The air bag deflates rapidly: in order to deflate more quickly as a supplement to the deflation of the air bag in the step b, the air bag needs to be deflated directly from the three-way inflation and deflation valve 4. The air inlet and outlet cam 5 is in a non-triggering state, at the moment, the air charging and discharging pressure rod 7 is pulled upwards by the pulling piece to overcome the pulling force of the tension spring 9, the valve rod (the third step valve rod 407) of the three-way air charging and discharging valve 4 is pushed upwards, the air bag end 403 and the air discharging end 402 of the three-way air charging and discharging valve 4 are communicated, and air can be discharged quickly because the air discharging end 402 is not shielded. In addition, tee bend gassing valve 4 can also regard as the backup of normally closed vent valve 3, in case normally closed vent valve 3 breaks down when unable the exhaust, the safety problem can appear in the air pocket internal pressure oversize, and tee bend gassing valve 4 can act as backup gassing valve this moment, removes the potential safety hazard fast.

Example 2

As shown in fig. 6-8, the intake and exhaust cam 5 is provided with an intake cam 501 and an exhaust cam 502 in parallel, the normally closed intake valve 2 and the normally closed exhaust valve 3 are provided in parallel, the intake pressure lever 6 is located on a rotation path of the intake cam 501 in the forward rotation, and the exhaust pressure lever 8 is located on a rotation path of the exhaust cam 502 in the reverse rotation.

The exhaust pressure bar 8 is an arc-shaped bar, gear grooves 801 from deep to shallow are sequentially arranged on the inner surface of the arc-shaped bar, the exhaust convex block 502 adopts a V-shaped bulge matched with the gear grooves 801, and in the process that the air inlet and exhaust cam 5 rotates from the initial deep gear grooves 801 to the shallow gear grooves 801, the degree of pressing down of the valve rod of the normally closed exhaust valve 3 is larger and larger, and exhaust is faster and faster.

Example 3

As shown in fig. 1, a torsion spring 14 is provided at the hinge joint of the intake and exhaust cam 5 and the base 1, and when no external force is applied, the torsion spring 14 automatically restores the intake and exhaust cam 5 to a position where the normally closed intake valve 2 and the normally closed exhaust valve 3 are not triggered. The intake and exhaust cams 5 can be automatically returned to the initial positions by the torsion spring 14.

Example 4

As shown in fig. 6, the intake and exhaust cam 5 is provided with an arc-shaped rack 503 for driving the intake and exhaust cam to rotate. The arc-shaped rack 503 can be meshed with a gear of a manual poke rod, and the normally closed air inlet valve 2 and the normally closed air outlet valve 3 are triggered manually. The arc-shaped rack 503 can also be meshed with a transmission gear driven by a motor, and provides a hardware basis for automatically controlling the opening of the normally closed air inlet valve 2 and the normally closed exhaust valve 3. Manual and automatic control modes can also be set simultaneously.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A height adjusting valve for an automobile seat comprises a base, a normally closed air inlet valve, a normally closed exhaust valve and a three-way air inlet and outlet valve, wherein the normally closed air inlet valve, the normally closed exhaust valve and the three-way air inlet and outlet valve are fixed on the base;

the air inlet end of the normally closed air inlet valve is connected with high-pressure air, and the air outlet end of the normally closed air inlet valve is respectively communicated with the air charging end of the three-way air charging and discharging valve and the air inlet end of the normally closed exhaust valve;

the air inlet pressure rod and the air exhaust pressure rod are respectively positioned on a positive and negative rotating path of the air inlet and exhaust cam, the air inlet and exhaust cam is positioned at a position where the air inlet pressure rod and the air exhaust pressure rod cannot be triggered to press down in an initial state, and the air inlet pressure rod and the air exhaust pressure rod are respectively triggered to press down when the air inlet and exhaust cam rotates positively and negatively;

the end part of the inflation and deflation air pressure rod is connected with the base through a tension spring, the tension spring enables the inflation and deflation air pressure rod to press the valve rod of the three-way inflation and deflation valve in an initial state, so that the inflation end of the three-way inflation and deflation valve is communicated with the air bag end, and when external force overcomes the tension force of the tension spring, the valve rod of the three-way inflation and deflation valve is restored to extend to a natural state, so that the deflation end of the three-way inflation and deflation valve is communicated with the air bag end.

2. The vehicle seat height adjusting valve according to claim 1, wherein the air intake and exhaust cam is provided with an air intake protrusion and an exhaust protrusion side by side, the normally closed air intake valve and the normally closed exhaust valve are provided side by side, the air intake pressure lever is located on a rotation path of the air intake protrusion in a forward rotation, and the exhaust pressure lever is located on a rotation path of the exhaust protrusion in a reverse rotation.

3. The automobile seat height adjusting valve according to claim 2, wherein the exhaust pressure lever is an arc-shaped lever, gear grooves from deep to shallow are sequentially formed in the inner surface of the arc-shaped lever, the exhaust convex block is a V-shaped protrusion matched with the gear grooves, and the valve rod of the normally closed exhaust valve is pressed to a greater degree in the process that the air inlet and exhaust cam rotates from the initial deep gear groove to the shallow gear groove.

4. The vehicle seat height adjusting valve according to claim 1, wherein the end of the inflation/deflation pressure rod is provided with a hook for pulling by external force.

5. The vehicle seat height adjusting valve according to claim 1, wherein a torsion spring is provided at the hinge joint of the intake and exhaust cam and the base, and when no external force is applied, the torsion spring automatically restores the intake and exhaust cam to a position where the normally closed intake valve and the normally closed exhaust valve are not triggered.

6. The vehicle seat height adjusting valve according to claim 1, wherein the air intake and exhaust cam is provided with an arc-shaped rack for driving the air intake and exhaust cam to rotate.

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