Cab air-tight sealing system meeting special requirements and air-tight sealing method

Abstract

The invention discloses a cab air-tight sealing system meeting special requirements and an air-tight sealing method, and the cab air-tight sealing system comprises an inflation sealing mechanism which comprises an air source and an air path distribution module; the vehicle door inflation sealing module, the sliding window inflation sealing module and the air conditioner air inlet plugging module are connected with the air source and air path distribution module through pipelines; the vehicle door inflation sealing module comprises a vehicle door outer sealing strip which is arranged along a frame of a vehicle door and can seal a gap between the vehicle door and a vehicle body through inflation expansion. The sliding window inflation sealing module comprises sliding window inflation sealing strips which are fixed to the periphery of the window frame, located between the sliding window glass and the window frame and capable of sealing the gap between the sliding window glass and the window frame. The air conditioner air inlet blocking module comprises a pneumatic driving mechanism and an air conditioner air inlet cover plate which is driven by the pneumatic driving mechanism and can block an air conditioner air inlet. According to the invention, the opening part of the cab can be fully sealed. And the sealing performance of the cab under special requirements is met.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile body and body accessory modification, and particularly refers to a cab airtightness system and an airtightness method that meet special requirements. Background Art

[0002] In the process of the continuous development of the automotive industry, the iteration and series installation applications of various vehicle models are becoming increasingly widespread. Especially in the general trend of the transformation of equipment towards systematic application, the application fields of modified vehicle models are constantly expanding. Special vehicle models such as sand-proof vehicles, dust-proof vehicles, gas-proof vehicles, chemical analysis equipment vehicles, chemical reconnaissance vehicles, detection vehicles, and chemical analysis vehicles have extremely stringent requirements for the airtightness of the vehicle.

[0003] However, for general vehicles on the current market, the requirements for body airtightness mostly focus only on rain-proof sealing, and do not have the function to meet special airtightness requirements. In special sealing scenarios such as sand-proof, dust-proof, and gas-proof, there are obvious deficiencies in the existing vehicle technologies, and new research and exploration are urgently needed.

[0004] With the continuous increase in the application scenarios of special vehicle models, customers' special requirements for vehicle airtightness are becoming more and more intense. In this context, developing an innovative solution that can effectively ensure the airtightness of the whole vehicle and meet the special airtightness requirements of equipment, and providing a practical way to solve the airtightness problems of current special vehicle models are the problems that need to be solved urgently at present. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the above background art, and provide a cab airtightness system and an airtightness method that can meet the airtightness requirements of special vehicle models.

[0006] To achieve this purpose, the cab airtightness system designed by the present invention that meets special requirements includes an inflation sealing mechanism, which includes a gas source and an air path distribution module; a door inflation sealing module, a sliding window inflation sealing module, and an air conditioner intake port blocking module that are connected to the gas source and the air path distribution module through pipelines; the door inflation sealing module includes an outer door sealing strip arranged along the door frame and capable of sealing the gap between the door and the vehicle body by inflating and expanding; the sliding window inflation sealing module includes a sliding window inflation sealing strip fixed around the window frame, located between the sliding window glass and the window frame, and capable of sealing the gap between the sliding window glass and the window frame; the air conditioner intake port blocking module includes a pneumatic driving mechanism and an air conditioner intake port cover plate driven by the pneumatic driving mechanism and capable of blocking the air conditioner intake port.

[0007] Furthermore, the gas source and air path distribution module includes a gas source; a control mechanism for controlling the opening or closing of the gas source; and an air pipe connected to the gas source and introducing the gas of the gas source into the door inflation sealing module, the sliding window inflation sealing module, and the air conditioner intake port blocking module.

[0008] Further, pressure regulating valves are connected to the air pipes between the air source and the door inflation sealing module, and between the air source and the sliding window inflation sealing module. By means of the pressure regulating valves, the intake air pressure of the outer door seal strip and the sliding window inflation seal strip of the vehicle can be ensured to be stable.

[0009] Further, the outer door seal strip of the vehicle includes a left outer door seal strip and a right outer door seal strip respectively arranged along the frames of the left and right doors of the cab.

[0010] Further, the sliding window inflation seal strip includes a left sliding window inflation seal strip and a right sliding window inflation seal strip respectively fixed around the window frames on the left and right sides of the cab and located between the sliding window glasses on the left and right sides of the cab and the window frames on the left and right sides of the cab.

[0011] Further, the cab airtight sealing system meeting special requirements further includes a body hole sealing structure, which includes a blind stud nut welded and fixed at the bolt mounting hole and a spot welding sealant applied to the welding part of the blind stud nut.

[0012] Further, the body hole sealing structure further includes a sealant coated at the body part mounting holes inside the cab.

[0013] Further, the body hole sealing structure further includes a gasket with a hard support structure fixed to the body part mounting hole by screws. The body part is fixed on the gasket, and a sealant is provided at the installation part of the screws.

[0014] Further, the cab airtight sealing system meeting special requirements further includes a door opening and closing part sealing structure, which includes a sealing sleeve for sealing the lock core, a protective sleeve sleeved on the handle shaft, a sealing ring fixed at the handle shaft mounting hole of the door lock decorative cover, and a sealant provided at the door lock mounting bolt hole of the door.

[0015] Furthermore, based on the above-mentioned airtight sealing method of the cab airtight sealing system meeting special requirements, it includes: the air source and the air path distribution module convey air to the door inflation sealing module, the sliding window inflation sealing module, and the air conditioner intake port blocking module. The outer door seal strip and the sliding window inflation seal strip are inflated and expanded to seal the gap between the door and the body and the gap between the sliding window glass and the window frame. The pneumatic driving mechanism drives the air conditioner intake port cover plate to block the air conditioner intake port.

[0016] The beneficial effects of the present invention are as follows: The cab airtight sealing system designed by the present invention covers a door inflation sealing module, a sliding window inflation sealing module, and an air conditioner intake port plugging module, which can comprehensively seal the main opening parts of the cab. The outer door seal is arranged along the door frame, and after inflation and expansion, it can effectively fill the gap between the door and the vehicle body; the sliding window inflation seal is fixed around the window frame to seal the gap between the sliding window glass and the window frame, ensuring the airtightness of these key parts and preventing gases, dust, etc. from entering through the gaps. Pressure regulating valves are connected to the air pipes between the air source and the door inflation sealing module, and between the air source and the sliding window inflation sealing module. Through the pressure regulating valves, the intake pressure of the outer door seal and the sliding window inflation seal can be stabilized. The stable pressure can ensure that the seals are always in a good inflated and sealed state, unaffected by the fluctuations of the air source pressure, thus continuously maintaining a high sealing performance. The body hole sealing structure adopts multiple methods. The blind stud nuts welded and fixed at the bolt mounting holes, in cooperation with the spot welding sealant applied to the welding joints, effectively prevent gases from leaking through the bolt mounting holes. At the same time, sealant is applied at the body part mounting holes inside the cab, and a gasket with a hard support structure is used and sealant is set at the screw mounting positions. These measures seal the body holes from multiple aspects, greatly reducing the overall air leakage points of the body and improving the overall airtightness performance of the cab. The door opening and closing part sealing structure conducts a sealing design for the components related to the door opening and closing. The seal sleeve for sealing the lock core, the protective sleeve sleeved on the handle shaft, the sealing ring fixed at the handle shaft mounting hole of the door lock decorative cover, and the sealant set at the door lock mounting bolt holes prevent gases from leaking through the gaps of the door opening and closing parts from various details, further enhancing the airtight integrity of the cab. The system adopts a modular design. The air source and air path distribution module introduces the air source gas into each sealing module, and each module is relatively independent and works in coordination. This design enables the system to have good adaptability in different vehicle models or different usage scenarios. Some modules can be adjusted or replaced according to actual needs without affecting the overall airtight performance. For example, for cabs with different door or window structures, the specific parameters or installation methods of the door inflation sealing module and the sliding window inflation sealing module can be adjusted accordingly. The air source and air path distribution module can quickly supply air to the door inflation sealing module, the sliding window inflation sealing module, and the air conditioner intake port plugging module. The outer door seal and the sliding window inflation seal are inflated and expanded synchronously, promptly sealing the gap between the door and the vehicle body and the gap between the sliding window glass and the window frame; at the same time, the pneumatic drive mechanism drives the air conditioner intake port cover to plug the air conditioner intake port. This synchronous and coordinated working method can complete the airtight action of the cab in a short time, improving the sealing efficiency and being applicable to special scenarios with requirements for the sealing response speed. The entire airtight method is based on the modular design of the system and is controlled by the air source and air path distribution module for unified air supply, with relatively simple operation.Without complex manual intervention, simply start the control mechanism of the air source and air circuit distribution module, and each sealing module can work in a predetermined manner, reducing the possibility of human operation errors and ensuring the reliability and consistency of the sealing operation. Description of the Drawings

[0017] Figure 1 It is a three-dimensional view of the connection between the air source and air circuit distribution module, the door inflation sealing module, the sliding window inflation sealing module, and the air conditioner intake port blocking module in the present invention;

[0018] Figure 2 It is a top view of the air source and air circuit distribution module in the present invention;

[0019] Figure 3 It is a working principle diagram of the connection between the air source and air circuit distribution module, the door inflation sealing module, the sliding window inflation sealing module, and the air conditioner intake port blocking module in the present invention;

[0020] Figure 4 It is a schematic diagram of the air conditioner intake port blocking module in the present invention;

[0021] Figure 5 It is a three-dimensional structure diagram of the pressure regulating valve in the present invention;

[0022] Figure 6 It is a front view of the inner structure of the door in the present invention;

[0023] Figure 7 For Figure 6 Enlarged view at A in

[0024] Figure 8 It is a three-dimensional view of the sliding window inflation sealing module in the present invention;

[0025] Figure 9 It is a radial cross-sectional view of the sliding window inflation sealing strip when not inflated in the present invention;

[0026] Figure 10 It is a radial cross-sectional view of the sliding window inflation sealing strip after inflation in the present invention;

[0027] Figure 11 It is a schematic diagram of the blind stud nut and the body part mounting hole on the body panel in the present invention;

[0028] Figure 12 It is an axial cross-sectional view of the connection between the bolt and the through-hole nut in the present invention;

[0029] Figure 13 It is an axial cross-sectional view of the connection between the bolt and the blind stud nut in the present invention;

[0030] Figure 14 It is a three-dimensional view of the mounting screw and gasket on the back of the outline lamp in the present invention;

[0031] Figure 15 This is a three-dimensional view of the elbow joint in the present invention installed on the vehicle body through screws and gaskets;

[0032] Figure 16 This is a schematic diagram of the main gluing surface of the cab in the present invention;

[0033] Figure 17 This is a three-dimensional view of the structure of the door lock in the present invention;

[0034] Figure 18 This is a vertical cross-sectional view of the door lock in the present invention;

[0035] Among them, 1 - door, 2 - vehicle body, 3 - outer door seal of the vehicle, 4 - window frame, 5 - sliding window glass, 6 - inflatable seal of the sliding window, 7 - air inlet of the air conditioner, 8 - cover plate of the air inlet of the air conditioner, 9 - air pipe, 10 - pressure regulating valve, 11 - blind stud nut, 12 - mounting hole for vehicle body parts, 13 - screw, 14 - gasket, 15 - seal sleeve, 16 - handle shaft, 17 - protective sleeve, 18 - door lock decorative cover, 19 - sealing ring, 20 - gas tank, 21 - cylinder, 22 - control valve, 23 - switch, 24 - three-way pipe joint, 25 - coiled disc, 26 - pressure regulating valve bracket, 27 - inner door seal of the vehicle, 28 - slot for the outer door seal of the vehicle, 29 - protective cover, 30 - bolt, 31 - through-hole nut, 32 - vehicle body door opening, 33 - front windshield mounting hole, 34 - front body of the vehicle. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] The cab airtightness system designed by the present invention to meet special requirements includes an inflatable seal mechanism, a vehicle body hole sealing structure, and a door opening and closing member sealing structure.

[0038] The inflatable seal mechanism includes a gas source and a gas path distribution module; a door inflatable seal module, a sliding window inflatable seal module, and an air inlet of the air conditioner plugging module connected to the gas source and the gas path distribution module through pipelines.

[0039] Embodiment 1

[0040] As Figure 1 shown in FIG. - 10, in some embodiments, the gas source and gas path distribution module includes a gas tank 20 installed on the chassis, an air pipe 9 connected to the gas tank 20, a three-way pipe joint 24, a two-way valve (control valve 22), and a pressure regulating valve 10.

[0041] The door inflation sealing module includes a curling plate 25. After the air pipe 9 enters the door interlayer, it is installed on the curling plate 25 and then divided into two paths, one leading to the door outer sealing strip 3 and the other leading to the sliding window inflation sealing strip 6.

[0042] The sliding window inflatable sealing module includes the above-mentioned sliding window inflatable sealing strip 6, which is fixed around the window frame 4, located between the sliding window glass 5 and the window frame 4, and can be inflated to seal the gap between the sliding window glass 5 and the window frame 4.

[0043] The air-conditioning air inlet blocking module comprises a cylinder 21 (pneumatic drive mechanism) and an air-conditioning air inlet cover plate 8 driven by the cylinder 21 and capable of blocking the air-conditioning air inlet 7 .

[0044] When the inflatable sealing mechanism is working, the gas is divided into two paths through the control valve 22 (two-body valve) and a three-way pipe joint 24. One path is led to the air conditioning air inlet 7 of the cabin through the front right baffle, and the air conditioning air inlet cover 8 is controlled by the cylinder 21; one path enters the pressure regulating valve 10, and then passes through a three-way pipe joint 24 and is divided into two paths, one path is led to the lower part of the front right baffle, and the other path is led to the lower part of the front left baffle through the second cross beam of the frame, and at the left and right baffles of the front baffle of the vehicle body, through The wall joint penetrates the vehicle body, and the pipeline is routed inside the interlayer of the side inner panel cavity, and then connected to the left and right doors respectively. A curling plate 24 pipe disc is set in the door 1. The air pipe 9 passing through the curling plate 24 coil is connected to the door outer sealing strip 3 and the sliding window inflatable sealing strip 6 respectively through a three-way pipe joint 24, so as to realize the inflation of the cylinder 21, the door outer sealing strip 3 and the sliding window inflatable sealing strip 6, and ensure the airtightness of the vehicle doors and windows. The right door and the left door are arranged symmetrically. The door inner sealing strip 27 adopts a clamping structure. In order to facilitate the replacement of the door outer sealing strip 3, the door outer sealing strip 3 is a ring groove clamping structure. The rubber tube of the door outer sealing strip 3 is connected to the gas tank 9. The sealing strip material is a dense solid silicone rubber. The air pipe 9 passes through the protective cover 29 and is curled and installed on the curling plate 19, which is convenient for opening and closing the door. The inflatable sealing strip 6 of the sliding window adopts a ring groove clamping structure. The rubber tube of the inflatable sealing strip 6 of the sliding window is connected to the air path. The material is dense elastic silicone rubber. The window is designed according to the adaptability of the sealing strip to ensure that the push-pull force is not greater than 200N. The air-conditioning air inlet 7 is blocked by the air-conditioning air inlet cover 8, and the air-conditioning air inlet 7 is controlled by connecting the air-conditioning air inlet cover 8 with the cylinder 21. The cylinder 21 adopts a spring return form. When inflating, the stroke of the cylinder 21 is opened, the air-conditioning air inlet cover 8 is pressed, and the air-conditioning air inlet 7 is sealed; when not inflated, after the two-body valve is deflated, the spring of the cylinder 21 contracts and pulls up the air-conditioning air inlet cover 8, so as to realize the automatic opening of the air-conditioning air inlet 7. The cylinder 21 is fixed to the vehicle body 2 and the air-conditioning air inlet cover 8 by a pin shaft, and both ends can be rotated for easy operation.

[0045] Under normal standard atmospheric pressure environment, the intake pressure output by the gas tank is 1 MPa, and the set pressure regulation range is 0.05 - 200 KPa. The pressure regulating valve 10 has the functions of waterproof and dustproof, and the operating environment temperature is -41 to 80 °C. After the pressure is adjusted, lock the screw on the adjusting cover and apply sealant to prevent the adjusting cover from rotating. If the pressure needs to be adjusted, loosen the screw on the adjusting cover, lift the adjusting cover, rotate it in the direction indicated by the arrow on the adjusting cover, and then press down the adjusting cover and lock it with the screw to ensure stable pressure.

[0046] Example Two

[0047] As Figure 11 —16 shows that in some embodiments, the sealing structure of the body holes is optimized. Usually, the fixation of the assembled parts is achieved through the connection of bolts 30 and through-hole nuts 31, and the installation holes are all through holes. Only the form of combining the assembly surface and thread sealant is used to ensure sealing. Such a structure has the risk of air leakage, such as the through holes of nuts for fixing the hanging armor, rear evaporation, etc.; the bolt installation holes of the steering column, etc. To solve such problems, a special blind stud nut 11 is designed for such structures. By full welding it to the back of the assembly surface and then with the auxiliary cooperation of sealant, the problem of through-hole sealing is permanently solved from the structure. The key glue-applying parts are around the body front panel 34, the front windshield installation hole 33, and the body door opening 32. For the assembly structures with torque requirements, such as the front panel master cylinder, clutch pump, etc., a gasket 15 with a hard support structure in the middle is used, such as a rubber sandwich metal support gasket: generally, rubber is used as the sealing main body, and a hard support structure such as a metal plate, metal mesh, or metal spring is embedded in the middle. Rubber has good elasticity and sealing performance, can adapt to a certain degree of deformation and vibration, and the metal support structure can improve the bearing capacity of the gasket, prevent excessive compression deformation, and extend the service life, which can ensure both the compression amount and the installation strength. For the installation surfaces of the outline lights and elbow joints, a gasket 15 is designed and sealed with sealant when fixed by screws 13.

[0048] Example Three

[0049] As Figure 17 —18 shows that in some embodiments, the sealing structure of the door opening and closing parts is optimized, which includes optimizing the door bolts, door locks, etc. The door lock uses a rubber sleeve for sealing (sealing sleeve 15), a protective sleeve 17 is sleeved on the handle shaft 16, a sealing ring 19 is fixed at the handle shaft installation hole of the door lock decorative cover 18, and sealant is filled at the door lock installation bolt hole of the door 1.

[0050] Example Four

[0051] As Figure 3As shown in the figure, the airtight sealing method of the cab airtight sealing system that meets the above special requirements includes: after the door 1 is closed, the switch 23 for controlling the control valve 22 in the cab is started. The gas with a pressure of 1 MPa in the gas tank 20 enters the cylinder 21 through the air pipe 9. One way is to block the air inlet 7 of the air conditioner through the air inlet cover plate 8 of the air conditioner. The other way is to enter the pressure regulating valve 10, adjust the pressure to 200 KPa, and then be divided into two paths through the tee joint 24, which are respectively connected to the left and right doors. The retractable coil 25 is arranged inside the door, and then is respectively connected to the outer door seal 3 and the inflatable seal strip 6 of the sliding window through the tee joint 24. When closing the door inflatable sealing system, first close the switch 23 (single-pole rocker switch) for controlling the control valve 22. The gas in the system is automatically discharged through the pressure regulating valve 10. Rotate the handle on the door 1 to open the door 1. In addition to the pressure regulating valve 10 exhausting air, a manual air release valve can also be set at the left door to exhaust air to ensure that the door can be opened as soon as possible.

[0052] Embodiment 5

[0053] The airtightness verification method of the cab airtight sealing system that meets the above special requirements is as follows: Under standard atmospheric pressure, set the air pressure in the cab to 300 Pa. After the air pressure is set, start the test. For the optimized cab, under the condition of an air intake volume of 7.75 cubic meters per hour, a pressure of 300 Pa can be stably established in the cab. Through the structural optimization of the cab, the airtightness performance is improved, meeting the requirement of establishing a pressure of 300 Pa in the vehicle body under the condition of an air intake volume of 150 cubic meters per hour.

[0054] In summary, the cab airtight sealing system designed by the present invention covers an airtight sealing module for the door, an airtight sealing module for the sliding window, and an airtight sealing module for the air inlet of the air conditioner, and can comprehensively seal the main opening parts of the cab. The outer door seal 3 is arranged along the door frame. After inflating and expanding, it can effectively fill the gap between the door 1 and the vehicle body 2; the inflatable seal strip 6 of the sliding window is fixed around the window frame 4 to seal the gap between the sliding window glass 5 and the window frame 4, ensuring the airtightness of these key parts and preventing gas, dust, etc. from entering through the gaps. A pressure regulating valve 10 is connected to the air pipe 9 between the gas source and the airtight sealing module for the door, and between the gas source and the airtight sealing module for the sliding window. Through the pressure regulating valve 10, the intake pressure of the outer door seal 3 and the inflatable seal strip 6 of the sliding window can be stabilized. The stable pressure can ensure that the seal strip is always in a good expanded and sealed state, not affected by the fluctuation of the gas source pressure, so as to continuously maintain a high sealing performance.

[0055] The body hole sealing structure adopts multiple methods. The blind stud nut 11 welded and fixed at the bolt mounting hole, in cooperation with the spot welding sealant applied at the welding point, effectively prevents gas from leaking through the bolt mounting hole. At the same time, sealant is applied at the body part mounting hole 12 in the cab, and a gasket 14 with a hard support structure is used and sealant is set at the mounting position of the screw 13. These measures seal the body holes from multiple aspects, greatly reducing the overall air leakage points of the body and improving the overall airtight performance of the cab.

[0056] The door opening and closing part sealing structure is designed for sealing the components related to the door opening and closing. The seal sleeve 15 for sealing the lock core, the protective sleeve 17 sleeved on the handle shaft 16, the sealing ring 19 fixed at the handle shaft mounting hole of the door lock decorative cover 18, and the sealant set at the door lock mounting bolt hole. These designs prevent gas from leaking through the gaps of the door opening and closing parts from every detail, further enhancing the airtight integrity of the cab.

[0057] The system adopts a modular design. The gas source and gas path distribution module introduces the gas source gas into each sealing module, and each module works independently and cooperatively. This design enables the system to have good adaptability in different vehicle models or different usage scenarios. Some modules can be adjusted or replaced according to actual needs without affecting the overall airtight performance. For example, for cabs with different door or window structures, the specific parameters or installation methods of the door inflation sealing module and the sliding window inflation sealing module can be adjusted accordingly. The gas source and gas path distribution module can quickly deliver gas to the door inflation sealing module, the sliding window inflation sealing module, and the air conditioner intake port plugging module. The outer door seal 3 and the sliding window inflation seal 6 are inflated and expanded synchronously, timely sealing the gap between the door 1 and the body 2 and the gap between the sliding window glass 5 and the window frame 4. At the same time, the pneumatic drive mechanism drives the air conditioner intake port cover 8 to plug the air conditioner intake port 7. This synchronous and coordinated working method can complete the airtight action of the cab in a short time, improving the sealing efficiency and being applicable to special scenarios with requirements for the sealing response speed.

[0058] The entire airtight method is based on the modular design of the system and is controlled by the gas source and gas path distribution module for unified gas supply. The operation is relatively simple. Without complex manual intervention, only by starting the control mechanism of the gas source and gas path distribution module, each sealing module can work in a predetermined manner, reducing the possibility of human operation errors and ensuring the reliability and consistency of the sealing operation.

[0059] Here, it should be noted that the description of the above technical solutions is exemplary. This specification can be embodied in different forms and should not be construed as limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are only defined by the scope of the claims. When using "including", "having", and "comprising" described in this specification, there may also be another part or other parts, and the terms used can generally be singular but can also represent plural forms. Finally, it should be pointed out that the above embodiments are only relatively representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and there can be many variations. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention should be considered to fall within the protection scope of the present invention.

Claims

1. A cab air sealing system that meets special requirements, characterized by: It includes an inflatable sealing mechanism, which includes an air source and air path distribution module; a vehicle door inflatable sealing module, a sliding window inflatable sealing module and an air conditioner air inlet blocking module connected to the air source and air path distribution module through pipelines; The vehicle door inflatable sealing module comprises a vehicle door outer sealing strip (3) arranged along the frame of the vehicle door (1) and capable of sealing the gap between the vehicle door (1) and the vehicle body (2) by inflating; the sliding window inflatable sealing module comprises a sliding window inflatable sealing strip (6) fixed around the window frame (4), located between the sliding window glass (5) and the window frame (4), and capable of sealing the gap between the sliding window glass (5) and the window frame (4); The air-conditioning air inlet blocking module comprises a pneumatic drive mechanism and an air-conditioning air inlet cover plate (8) driven by the pneumatic drive mechanism and capable of blocking the air-conditioning air inlet (7).

2. The cab air sealing system meeting special requirements as claimed in claim 1, characterized in that: The gas source and gas path distribution module comprises a gas source; a control mechanism for controlling the opening or closing of the gas source; and a gas pipe (9) connected to the gas source and introducing the gas from the gas source into the vehicle door inflation sealing module, the sliding window inflation sealing module and the air conditioning air inlet blocking module.

3. The cab air sealing system meeting special requirements as claimed in claim 2, characterized in that: The air pipe (9) between the air source and the vehicle door inflation sealing module, and the air pipe (9) between the air source and the sliding window inflation sealing module are both connected to a pressure regulating valve (10), and the pressure regulating valve (10) can ensure that the air intake pressure of the vehicle door outer sealing strip (3) and the sliding window inflation sealing strip (6) is stable.

4. The cab air sealing system meeting special requirements as claimed in claim 1 or 3, characterized in that: The vehicle door outer sealing strip (3) comprises a left vehicle door outer sealing strip and a right vehicle door outer sealing strip respectively arranged along the frames of the left and right vehicle doors of the cab.

5. The cab air sealing system meeting special requirements as claimed in claim 1 or 3, characterized in that: The sliding window inflatable sealing strip (6) comprises a left sliding window inflatable sealing strip and a right sliding window inflatable sealing strip respectively fixed around the left and right window frames of the cab and located between the left and right sliding window glasses of the cab and the left and right window frames of the cab.

6. The cab air sealing system meeting special requirements as claimed in claim 1, characterized in that: The invention also comprises a vehicle body hole sealing structure, which comprises a blind post nut (11) welded and fixed at the bolt mounting hole, and a spot welding sealant applied to the welding position of the blind post nut (11).

7. The cab air sealing system meeting special requirements as claimed in claim 6, characterized in that: The vehicle body hole sealing structure also includes a sealant applied to the vehicle body component mounting hole (12) in the cab.

8. The cab air sealing system meeting special requirements as claimed in claim 7, characterized in that: The vehicle body hole sealing structure also includes a sealing pad (14) having a hard support structure and fixed to the vehicle body component mounting hole (12) by means of a screw (13); the vehicle body component is fixed to the sealing pad (14); and a sealing adhesive is provided at the mounting position of the screw (13).

9. The cab air sealing system meeting special requirements as claimed in claim 1, characterized in that: The invention also comprises a vehicle door opening and closing member sealing structure, which comprises a sealing sleeve (15) for sealing a lock core, a protective sleeve (17) sleeved on a handle shaft (16), a sealing ring (19) fixed at a handle shaft mounting hole of a door lock decorative cover (18), and a sealing glue arranged at a door lock mounting bolt hole of the vehicle door (1).

10. An air sealing method for a cab air sealing system that meets special requirements based on any one of claims 1 to 9, characterized in that: It includes: The air source and air path distribution module conveys air to the vehicle door inflation sealing module, the sliding window inflation sealing module and the air conditioning air inlet blocking module, the vehicle door outer sealing strip (3) and the sliding window inflation sealing strip (6) are inflated to seal the gap between the vehicle door (1) and the vehicle body (2) and the gap between the sliding window glass (5) and the window frame (4), and the pneumatic drive mechanism drives the air conditioning air inlet cover plate (8) to block the air conditioning air inlet (7).

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