Vacuum tire pump

Abstract

The utility model belongs to the technical field of inflators, and particularly relates to a vacuum tire inflator which comprises a connecting base, a cylinder body and an air outlet pipe are detachably connected to the connecting base, a piston device is movably arranged in the cylinder body, an air outlet nozzle is arranged on the air outlet pipe, and the cylinder body comprises a piston cavity and an air storage cavity which are independently arranged. The connecting base is connected with an air flow channel of the air storage cavity and the air outlet pipe, the piston device is movably arranged in the piston cavity, the piston cavity is connected with a first air hole, a one-way valve is arranged in the first air hole, and the piston device can drive air in the piston cavity to pass through the first air hole and the one-way valve and enter the air storage cavity or the air outlet pipe; a sealing device is movably arranged on the air outlet nozzle and can control the air outlet nozzle to be sealed, so that air in the air outlet pipe is prevented from being exhausted from the air outlet nozzle, and the vacuum tire pump is long in service life and convenient to produce and machine.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of inflator, especially relates to a vacuum tire inflator. BACKGROUND

[0002] The inflator is a kind of air pump, and air is sucked into storage part by pulling mode, and then air required by various tires and some balls is injected or supplemented by pushing mode.

[0003] Nowadays, vacuum tires are increasingly widely used on bicycles, motorcycles, cars, buses and trucks on the market, have higher elasticity and wear resistance, and have good adhesion and heat dissipation performance, and when daily tire pressure is supplemented, it is similar to ordinary tires, but air is easy to discharge from the gap between the vacuum tire and the hub when the vacuum tire is initially inflated, so a special inflator is needed to inflate, such as a one-piece double-cylinder inflator disclosed in Chinese invention patent CN201711474745.1, which comprises a base, an outer pipe and an air outlet pipe are arranged on the base, an adjusting valve assembly is arranged in the middle of the outer pipe, a piston cylinder is formed in the outer pipe above the adjusting valve assembly, a gas storage cylinder is formed in the outer pipe below the adjusting valve assembly, a lower air pipe is arranged between the lower end of the adjusting valve assembly and the base, the center of the lower air pipe is communicated with the air outlet pipe, the upper end of the piston cylinder is provided with a cylinder sleeve, the center of the cylinder sleeve is provided with a piston rod, the upper end of the piston rod extends out of the outer pipe and is connected with a handle, and the lower end of the piston rod is connected with a piston;The valve core of the adjusting valve assembly is rotated to complete state switching, when inflating, the piston cylinder and the lower air pipe are communicated through the valve core;When storing gas, the piston cylinder and the gas storage cylinder are communicated through the valve core;When high-pressure air is discharged, the gas storage cylinder and the lower air pipe are communicated through the valve core;The adjusting valve assembly comprises a valve body in the form of a round cake, a valve core arranged radially and in rotational cooperation with the valve body, and a sealing cover arranged on the upper end of the valve body, the valve core is sequentially provided with a gas storage hole, an air outlet hole and an air inlet hole from left to right, the gas storage hole and the air outlet hole are radially penetrated through the valve core, and the gas storage hole and the air outlet hole are vertically arranged, the air outlet hole and the air inlet hole are communicated through the axially arranged center hole, the air inlet hole is two, and the two air inlet holes are communicated to the center hole and vertically arranged on the same circumferential surface;The left and right check valves are arranged above the gas storage hole and the air inlet hole on the valve body, the left and right through holes are arranged on the sealing cover corresponding to the left and right check valves, and the left and right gas inlet holes are arranged on the valve body corresponding to the left and right check valves.

[0004] In the above structure, high-pressure gas is stored in the gas storage cylinder, and when used, the gas storage cylinder and the lower air pipe are quickly connected through the adjusting valve assembly, so as to inflate the vacuum tire, but in the structure, the outer pipe is divided into the piston cylinder and the gas storage cylinder by the adjusting valve assembly, and the valve body is installed through the valve core, and the pressure difference between the piston cylinder and the gas storage cylinder during use will cause the valve core to be damaged under stress, affecting the service life of the inflator. SUMMARY

[0005] In order to overcome the defects in the prior art, the utility model discloses a long service life and the vacuum tire inflator that production and processing are convenient.

[0006] The utility model discloses a long service life and the vacuum tire inflator that production and processing are convenient.

[0007] A vacuum tire inflator, including the connecting seat, detachably connected with cylinder and the air pipe on the connecting seat, the piston device is movably arranged in the cylinder, the air outlet is provided on the air pipe, the cylinder includes the piston cavity and the gas storage cavity that set up independently, the air flow channel of connecting seat and the air pipe of gas storage cavity, piston device movably sets up in the piston cavity, and the first gas hole is connected on the piston cavity, and one-way valve is arranged in the first gas hole, and piston device can drive the air in the piston cavity to pass through the first gas hole and one-way valve and enter the gas storage cavity or the air pipe,

[0008] The sealing device is movably arranged on the air outlet, and the sealing device can control the sealing of the air outlet, so that the air in the air pipe is prevented from being discharged from the air outlet.

[0009] The utility model further sets up: the air outlet is provided with the air passage, and the sealing mouth is arranged in the air passage, and the sealing device includes the driving part and the sealing piece, and the sealing piece is movably arranged in the air passage, and the driving part is rotatably arranged on the air outlet and passes out from the air outlet, and the driving part can drive the sealing piece to seal the sealing mouth, or the driving part can drive the sealing piece to separate from the sealing mouth.

[0010] The utility model further sets up: the sealing mouth one end is provided with the tapered sealing surface, and the sealing device includes the elastic piece, and the elastic piece can drive the sealing piece to abut on the sealing surface and seal the sealing mouth, and the driving part can drive the sealing piece to move and make the sealing piece away from the sealing surface.

[0011] The utility model further sets up: the driving part includes the control portion and the hinged link with the air outlet rotatable connection, and the cam portion is arranged on the hinged link, and the control driving part rotates, and the cam portion can drive the sealing piece and the sealing mouth relative movement.

[0012] The utility model further sets up: the air outlet is provided with the limit swing groove, and the driving part is provided with the limit protruding of the limit swing groove adaptation, and the limit swing groove and the limit protruding cooperation can limit the rotation range of the driving part, and the limit protruding is controlled and swings in the limit swing groove, and the cam portion can drive the sealing piece to move, and the air passage keeps the sealed state and the intercommunication state.

[0013] The utility model further sets up: the air outlet is provided with the hinge hole of both sides of through air filling nozzle, hinge link and hinge hole rotation connection, the middle part of hinge hole is connected with the air outlet channel, the cam part sets up in the middle part of hinge link, and is provided with two groups of second sealing ring on the hinge link, two groups of second sealing ring are located air outlet channel both sides respectively, avoid the air in air outlet channel from hinge hole and discharge.

[0014] The utility model further sets up: the hinge link one end is provided with control part, control part and hinge link present L or T shape setting, and hinge link other end is provided with snap spring groove, is provided with snap spring in the snap spring groove, and snap spring and hinge link are respectively in abutment in hinge link both ends and limit hinge link axial movement in hinge hole.

[0015] The utility model further sets up: the sealing piece includes the guide rod of sliding setting in the sealing mouth, is provided with the gas guide groove on the outer periphery of guide rod, the outer periphery of guide rod is equipped with first sealing ring for sealing the sealing mouth, and first sealing ring sets up in gas guide groove one end.

[0016] The utility model further sets up: the sealing device includes the driving piece of rotation setting on the air outlet, is provided with the sealing part for sealing air outlet channel on the driving piece, and is provided with gas guide hole on the sealing part, and the gas guide hole can be communicated with the air outlet channel of driving piece both sides;Control gas guide hole and air outlet channel dislocation, can make sealing part seal air outlet channel.

[0017] The utility model further sets up: be provided with first gas hole, second gas hole and third gas hole respectively with the airflow channel connection on the connecting seat, first gas hole, second gas hole and third gas hole are connected with piston cavity, gas storage cavity and air outlet tube respectively, and piston device can drive the air in piston cavity through first gas hole and check valve and enter gas storage cavity and air outlet tube.

[0018] The utility model has the advantages compared with prior art:

[0019] 1、The utility model discloses independently setting piston cavity and gas storage cavity are favorable to improve the structural strength of cylinder body, and the cylinder body structure is not easy to be damaged after long -time use, and it is favorable to prolong the service life of vacuum tire inflator, and because sealing device is movably arranged on the air outlet, when sealing device is damaged, the user can quickly repair and replace, it is convenient to prolong the service life of vacuum tire inflator, and the sealing device in the structure only needs to control the sealing of air outlet, does not need to control the sealing of piston cavity and gas storage cavity, is favorable to simplify sealing device structure, and simple processing is convenient for production and processing.

[0020] 2. In this utility model, the opening or sealing of the sealing port is controlled by a driving component and a sealing component. The structure is simple and convenient for users to use and control. Since the sealing component is movable in the air outlet channel, it is easy to seal the sealing port, which helps to improve the sealing effect of the air outlet. The conical sealing surface is designed to improve the sealing effect of the sealing component on the sealing port and can prevent the sealing component from being misaligned during use. The elastic component is designed to ensure that the sealing component and the sealing surface are in close contact, preventing accidental air leakage from the air outlet during use.

[0021] 3. The cam part of this utility model is designed to facilitate the movement of the sealing element during the rotation of the driving element. The cam part has a simple structure and is easy to manufacture. The limiting swing groove and limiting protrusion are designed to limit the rotation range of the driving element, so that the user can drive the air outlet channel through the cam part to maintain the sealing and communication state, and avoid the driving element rotating too much and affecting the sealing of the sealing port, which is convenient for the user.

[0022] 4. The hinge holes that run through both sides of the air nozzle in this utility model facilitate the stable installation of the drive component, while the second sealing rings set on both sides of the air outlet channel can prevent air in the air outlet channel from being discharged through the hinge holes, which helps to improve the sealing performance of the air outlet and makes it convenient for users to use; the control part and hinge rod set in an L-shape or T-shape facilitate the setting of a control drive component to rotate, making it convenient for users to control; and the setting of the snap ring groove and snap ring facilitates the disassembly and installation of the drive component and the air outlet.

[0023] 5. The guide rod in this utility model facilitates the positioning and connection of the sealing port and the sealing element, preventing misalignment between the positioning element and the sealing port from affecting the use and control of the vacuum tire inflator. The air guide groove facilitates the rapid discharge of air from the air outlet, making the vacuum tire inflator convenient to use. The simple structure of the sealing part and the air guide hole helps to simplify the structure of the sealing device and facilitates the assembly and production of the vacuum tire inflator. In this structure, the piston chamber, the air storage chamber and the air outlet pipe are connected through the first air hole, the second air hole and the third air hole on the connecting seat. During the production process, only holes need to be machined on the connecting seat, which simplifies the structure of the cylinder and facilitates the production and processing of the vacuum tire inflator. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the present invention;

[0026] Figure 3 This is a partial sectional view of the connecting seat, air outlet pipe and cylinder body connection structure in this utility model;

[0027] Figure 4This is one of the partial cross-sectional views of the connection structure between the air outlet pipe and the air outlet nozzle in this utility model;

[0028] Figure 5 This is a second partial cross-sectional view of the connection structure between the air outlet pipe and the air outlet nozzle in this utility model;

[0029] Figure 6 This is an explosion diagram of the vent pipe in this utility model;

[0030] Figure 7 This is a cross-sectional view of the outer casing of this utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the outer shell of this utility model;

[0032] Figure 9 This is one of the structural schematic diagrams of the driving component in this utility model;

[0033] Figure 10 This is the second structural schematic diagram of the driving component in this utility model;

[0034] Figure 11 This is a structural schematic diagram of the sealing element in this utility model.

[0035] The labels in the diagram have the following meanings: 1-Connecting seat; 11-Airflow channel; 12-First air hole; 13-Second air hole; 14-Third air hole; 2-Cylinder body; 21-Piston chamber; 22-Air storage chamber; 3-Piston device; 31-Piston head; 32-Piston rod; 33-Handle; 4-Air outlet pipe; 5-Air outlet nozzle; 51-Outer shell; 52-Control lever; 53-Air core; 511-Air outlet channel; 512-Sealing port; 513-Sealing surface; 514-Hinge hole; 515-Moving groove;

[0036] 516-Limiting swing groove; 6-Sealing device; 61-Drive component; 62-Sealing component; 63-Elastic component; 611-Hinge rod; 612-Cam part; 613-Second sealing ring; 614-Control part; 615-Limiting protrusion; 616-Snap ring groove; 621-Guide rod; 622-First sealing ring; 623-Mounting protrusion; 624-Air guide groove; 7-Pressure gauge; 8-One-way valve. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0038] See Figures 1 to 11As shown, a kind of vacuum tire inflator, including connecting seat 1, detachably connected with cylinder 2 and air outlet pipe 4 on connecting seat 1, piston device 3 is movably arranged in cylinder 2, air outlet nozzle 5 is provided on air outlet pipe 4, the cylinder 2 includes independently arranged piston cavity 21 and gas storage cavity 22, the gas flow channel 11 of connecting seat 1 is connected gas storage cavity 22 and air outlet pipe 4, piston device 3 is movably arranged in piston cavity 21, first air hole 12 is connected on piston cavity 21, one-way valve 8 is provided in first air hole 12, piston device 3 can drive the air in piston cavity 21 pass through first air hole 12 and one-way valve 8 and enter gas storage cavity 22 or air outlet pipe 4, the structure in which independently arranged piston cavity 21 and gas storage cavity 22 are favorable to improve the structural strength of cylinder 2, cylinder 2 structure is not easy to be damaged after long time use, it is favorable to prolong the service life of vacuum tire inflator, and because sealing device 6 is movably arranged on air outlet nozzle 5, when sealing device 6 is damaged, user can quickly repair and replace, facilitate to prolong the service life of vacuum tire inflator.

[0039] The air outlet nozzle 5 movably provided with sealing device 6, sealing device 6 can control the sealing of air outlet nozzle 5, so as to avoid the air in air outlet pipe 4 from air outlet nozzle 5, the sealing device 6 in the structure only needs to control the sealing of air outlet nozzle 5, and does not need to control the sealing of piston cavity 21 and gas storage cavity 22, so as to simplify the structure of sealing device 6, and facilitate production and processing.

[0040] The air outlet nozzle 5 in the utility model can be any air outlet nozzle 5 structure on the market, the air outlet nozzle 5 in the embodiment includes a shell 51 and a gas core 53, a control rod 52 for controlling the gas core 53 is rotatably arranged on the shell 51, the piston device 3 includes a handle 33 and a piston head 31 penetrating the piston cavity 21, and the piston head 31 is connected with the handle 33 through a piston rod 32.

[0041] The sealing device 6 can only include a driving member 61 rotatably arranged on the air outlet nozzle 5, the driving member 61 is provided with a sealing portion for sealing the air outlet channel 511, and the sealing portion is provided with a gas guide hole, the gas guide hole can communicate the air outlet channels 511 on both sides of the driving member 61; the gas guide hole is dislocated with the air outlet channel 511, so that the sealing portion can seal the air outlet channel 511, the structure of the sealing portion and the gas guide hole is simple, which is favorable to simplify the structure of the sealing device 6 and facilitate the assembly and production of the vacuum tire inflator, the structure in which the driving member 61 and the air outlet nozzle 5 can be combined to form a structure similar to a faucet, and the structure is similar to the structure shown in the drawings of the utility model specification Figure 5 Although the structure is not specifically shown in the drawings of the present application specification, the skilled person can realize the technical solution in combination with their own knowledge and prior art

[0042] The utility model discloses the sealing device 6 of the air outlet nozzle 5, the sealing device 6 includes the driving piece 61 and the sealing piece 62, the sealing piece 62 is movably arranged in the air outlet channel 511, the driving piece 61 is rotatably arranged on the air outlet nozzle 5 and is from the air outlet nozzle 5 and is worn, the driving piece 61 can drive the sealing piece 62 and seal the sealing mouth 512, or, the driving piece 61 can drive the sealing piece 62 and separate from the sealing mouth 512, the structure in this in the driving piece 61 and the sealing piece 62 control the opening or sealing of sealing mouth 512, simple structure, convenient for user to use control, and because the sealing piece 62 is movably arranged in the air outlet channel 511, it is convenient to seal the sealing mouth 512, is favorable to improve the sealing effect of air outlet nozzle 5.

[0043] The utility model discloses the sealing device 6 of the air outlet nozzle 5, the sealing device 6 includes the driving piece 61 and the sealing piece 62, the sealing piece 62 is movably arranged in the air outlet channel 511, the driving piece 61 is rotatably arranged on the air outlet nozzle 5 and is from the air outlet nozzle 5 and is worn, the driving piece 61 can drive the sealing piece 62 and seal the sealing mouth 512, or, the driving piece 61 can drive the sealing piece 62 and separate from the sealing mouth 512, the structure in this in the driving piece 61 and the sealing piece 62 control the opening or sealing of sealing mouth 512, simple structure, convenient for user to use control, and because the sealing piece 62 is movably arranged in the air outlet channel 511, it is convenient to seal the sealing mouth 512, is favorable to improve the sealing effect of air outlet nozzle 5.

[0044] The utility model discloses the driving piece 61 includes control portion 614 and the hinge rod 611 of rotation connection with the air outlet nozzle 5, is provided with cam portion 612 on the hinge rod 611, controls driving piece 61 rotation, cam portion 612 can drive sealing piece 62 and sealing mouth 512 relative movement, the setting of cam portion 612 has conveniently driven sealing piece 62 movement in the rotation process of driving piece 61, and cam portion 612 simple structure, convenient production and processing.

[0045] The utility model discloses the air outlet nozzle 5 is provided with the limit swing groove 516, and the driving piece 61 is provided with the limit protruding 615 of adaptation with the limit swing groove 516, and the limit swing groove 516 is limited with the limit protruding 615 the rotation range of driving piece 61, and control limit protruding 615 swing in limit swing groove 516, cam portion 612 can drive sealing piece 62 movement, and make the air outlet channel 511 keep sealed state and intercommunication state, and the setting of limit swing groove 516 and limit protruding 615 has conveniently limited the rotation range of driving piece 61, thereby conveniently make the user keep sealed state and intercommunication state through cam portion 612 drive air outlet channel 511, avoid the influence of driving piece 61 rotation angle too big to sealing piece 62 to sealing mouth 512, convenient for user to use.

[0046] The air outlet nozzle 5 is provided with a hinge hole 514 penetrating through both sides of the air inlet nozzle, a hinge rod 611 is rotationally connected with the hinge hole 514, the middle part of the hinge hole 514 is communicated with the air outlet channel 511, a cam part 612 is arranged in the middle part of the hinge rod 611, and two groups of second sealing rings 613 are arranged on the hinge rod 611 and located on both sides of the air outlet channel 511 respectively, so that the air in the air outlet channel 511 is prevented from being discharged from the hinge hole 514, the hinge hole 514 penetrating through both sides of the air inlet nozzle facilitates stable installation of the driving member 61, and the second sealing rings 613 arranged on both sides of the air outlet channel 511 can prevent the air in the air outlet channel 511 from being discharged from the hinge hole 514, which is beneficial to improve the sealing performance of the air outlet nozzle 5 and facilitate use of the user.

[0047] The hinge rod 611 is provided with a control part 614 at one end, the control part 614 is arranged in an L shape or a T shape with the hinge rod 611, and the hinge rod 611 is provided with a snap spring groove 616 at the other end, the snap spring groove 616 is provided with a snap spring, the snap spring and the hinge rod 611 abut against both ends of the hinge rod 611 respectively and limit the axial movement of the hinge rod 611 in the hinge hole 514, the control part 614 arranged in an L shape or a T shape with the hinge rod 611 facilitates rotation of the control driving member 61, facilitates control of the user, and the arrangement of the snap spring groove 616 and the snap spring facilitates dismounting and mounting of the driving member 61, facilitates dismounting and mounting of the air outlet nozzle 5, and the snap spring is not shown in the drawings of the utility model, but the technical solution can be realized by the person skilled in the art in combination with the specification and the drawings of the specification.

[0048] The control part 614 is arranged in an L shape with the hinge rod 611 in the embodiment, the air inlet nozzle is provided with a movable groove 515 for limiting the rotation angle of the control part 614, and the arrangement of the movable groove 515 can reduce the stress of the limiting protrusion 615 during use and avoid damage of the limiting protrusion 615.

[0049] The sealing member 62 comprises a guide rod 621 slidingly arranged in the sealing port 512, the guide rod 621 is provided with a gas guide groove 624 around the outer periphery, the guide rod 621 is provided with a first sealing ring 622 for sealing the sealing port 512 around the outer periphery, the first sealing ring 622 is arranged at one end of the gas guide groove 624, the arrangement of the guide rod 621 facilitates positioning connection of the sealing port 512 and the sealing member 62, avoids deflection and misplacement of the positioning member and the sealing port 512, and affects use control of the vacuum tire inflator, the arrangement of the gas guide groove 624 facilitates rapid discharge of the air in the air outlet nozzle 5, and facilitates use of the vacuum tire inflator, the elastic member 63 is a compression spring in the embodiment, and the guide rod is provided with a mounting protrusion 623 for mounting the elastic member 63 at one end.

[0050] The connecting seat 1 is provided with a first air hole 12, a second air hole 13 and a third air hole 14, which are connected with the air flow channel 11 respectively, and the first air hole 12, the second air hole 13 and the third air hole 14 are connected with the piston cavity 21, the air storage cavity 22 and the air outlet pipe 4 respectively, and the piston device 3 can drive the air in the piston cavity 21 to pass through the first air hole 12 and the one-way valve 8 and enter the air storage cavity 22 and the air outlet pipe 4, in the structure, the piston cavity 21, the air storage cavity 22 and the air outlet pipe 4 are connected through the first air hole 12, the second air hole 13 and the third air hole 14 on the connecting seat 1, only the hole on the connecting seat 1 needs to be machined in the production process, so that the structure of the cylinder body 2 is simplified, and the production and processing of the vacuum tire inflator are facilitated.

[0051] Preferably, the air storage cavity 22 is connected with a pressure gauge 7 at the upper end, the second air hole 13 and the third air hole 14 are always communicated through the air flow channel 11 in the use process of the vacuum tire inflator, and the user can know the air pressure in the air storage cavity 22 and the air outlet channel 511 in real time through the pressure gauge 7.

[0052] The above embodiment is only a preferred embodiment of the utility model, and does not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A vacuum tire inflator comprising a connecting seat (1), a cylinder (2) and an air outlet pipe (4) detachably connected to the connecting seat (1), a piston device (3) movably arranged in the cylinder (2), and an air outlet nozzle (5) arranged on the air outlet pipe (4), characterized in that: The cylinder (2) comprises a piston cavity (21) and a gas storage cavity (22) arranged independently, a gas flow channel (11) connecting the gas storage cavity (22) and the gas outlet pipe (4) on the connecting base (1), a piston device (3) movably arranged in the piston cavity (21), a first gas hole (12) connected to the piston cavity (21), a one-way valve (8) arranged in the first gas hole (12), and the piston device (3) can drive the air in the piston cavity (21) to pass through the first gas hole (12) and the one-way valve (8) and enter the gas storage cavity (22) or the gas outlet pipe (4). The sealing device (6) is movably arranged on the gas outlet nozzle (5), and the sealing device (6) can control the sealing of the gas outlet nozzle (5), so as to avoid the air in the gas outlet pipe (4) from being discharged from the gas outlet nozzle (5).

2. A vacuum tire inflator as defined in claim 1, wherein: The gas outlet nozzle (5) is provided with a gas outlet channel (511), and the gas outlet channel (511) is provided with a sealing port (512). The sealing device (6) comprises a driving member (61) and a sealing member (62). The sealing member (62) is movably arranged in the gas outlet channel (511), and the driving member (61) is rotatably arranged on the gas outlet nozzle (5) and extends out of the gas outlet nozzle (5). The driving member (61) can drive the sealing member (62) to seal the sealing port (512), or the driving member (61) can drive the sealing member (62) to separate from the sealing port (512).

3. A vacuum tire inflator as defined in claim 2 wherein: One end of the sealing port (512) is provided with a tapered sealing surface (513), and the sealing device (6) comprises an elastic member (63). The elastic member (63) can drive the sealing member (62) to abut against the sealing surface (513) and seal the sealing port (512). The driving member (61) can drive the sealing member (62) to move and make the sealing member (62) away from the sealing surface (513).

4. A vacuum tyre inflator according to claim 2 or 3, characterised in that: The driving member (61) comprises a control portion (614) and a hinged rod (611) rotatably connected with the gas outlet nozzle (5). The hinged rod (611) is provided with a cam portion (612). The cam portion (612) can drive the sealing member (62) to move relative to the sealing port (512).

5. A vacuum tire inflator as defined in claim 4 wherein: The gas outlet nozzle (5) is provided with a limiting swing groove (516), and the driving member (61) is provided with a limiting protrusion (615) matched with the limiting swing groove (516). The limiting swing groove (516) and the limiting protrusion (615) cooperate to limit the rotation range of the driving member (61). The limiting protrusion (615) swings in the limiting swing groove (516). The cam portion (612) can drive the sealing member (62) to move, and the gas outlet channel (511) can be kept in a sealed state and a connected state.

6. A vacuum tyre inflator according to claim 2 or 3 or 5, wherein: The air outlet nozzle (5) is provided with a hinge hole (514) penetrating through both sides of the air outlet nozzle, a hinge rod (611) is rotationally connected with the hinge hole (514), the middle part of the hinge hole (514) is communicated with the air outlet channel (511), a cam part (612) is arranged in the middle part of the hinge rod (611), and two groups of second sealing rings (613) are arranged on the hinge rod (611), and the two groups of second sealing rings (613) are respectively arranged on both sides of the air outlet channel (511), so that the air in the air outlet channel (511) is prevented from being discharged from the hinge hole (514).

7. A vacuum tire inflator as defined in claim 6 wherein: The hinge rod (611) is provided with a control part (614) at one end, the control part (614) is arranged in an L shape or a T shape with the hinge rod (611), and the hinge rod (611) is provided with a snap spring groove (616) at the other end, the snap spring groove (616) is provided with a snap spring, and the snap spring is respectively abutted against both ends of the hinge rod (611) and limits the axial movement of the hinge rod (611) in the hinge hole (514).

8. A vacuum tire inflator as defined in any of claims 2, 3, 5 or 7, wherein: The sealing member (62) comprises a guide rod (621) slidingly arranged in the sealing port (512), the guide rod (621) is provided with an air guide groove (624) on the outer periphery, the guide rod (621) is provided with a first sealing ring (622) for sealing the sealing port (512) on the outer periphery, and the first sealing ring (622) is arranged at one end of the air guide groove (624).

9. A vacuum tire inflator as defined in claim 1, wherein: The sealing device (6) comprises a driving member (61) rotationally arranged on the air outlet nozzle (5), the driving member (61) is provided with a sealing part for sealing the air outlet channel (511), and the sealing part is provided with an air guide hole, the air guide hole can communicate the air outlet channels (511) on both sides of the driving member (61); the air guide hole is dislocated with the air outlet channel (511), so that the sealing part can seal the air outlet channel (511).

10. A vacuum tire inflator as defined in any of claims 1, 2, 3, 5, 7 or 9, wherein: The connecting seat (1) is provided with a first air hole (12), a second air hole (13) and a third air hole (14) connected with the air flow channel (11) respectively, the first air hole (12), the second air hole (13) and the third air hole (14) are connected with the piston cavity (21), the air storage cavity (22) and the air outlet pipe (4) respectively, the piston device (3) can drive the air in the piston cavity (21) to pass through the first air hole (12) and the one-way valve (8) and enter the air storage cavity (22) and the air outlet pipe (4).

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