Air rear suspension of new energy port tractor

Abstract

The invention discloses an air rear suspension of a new energy port tractor, and belongs to the technical field of air suspensions, the air rear suspension comprises a bag type air spring and a spring shock absorber, the upper and lower sides of the bag type air spring and the spring shock absorber are respectively provided with a cross beam and a frame, and the frame is fixedly provided with an air compressor and an air storage tank which are communicated with each other; the bag type air spring comprises a dust cover, an upper cover plate and a lower cover plate, a zigzag through hole is formed in the upper cover plate, a main air bag is arranged in the dust cover, auxiliary air bags are arranged on the upper side and the lower side in the main air bag, magnetic strips are arranged on the auxiliary air bags and the dust cover, and an adhesive bag is arranged in the main air bag. The moving rod is inserted into an inner cavity of the fixing rod and fixedly connected with the damping spring, the fixing rod is provided with a distance sensor and a pressure sensor, an air blowing hole is formed outside the fixing rod, the air storage tank is communicated with the fixing rod, and the fixing rod is communicated with the main air bag and the auxiliary air bag. The service life can be prolonged, faults are reduced, and the driving safety and the operation efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air suspensions, and in particular to an air rear suspension of a new energy port tractor. Background Art

[0002] As key equipment in modern port logistics, new energy port tractors are widely used in high-load operations such as loading and unloading and transshipment of containers. With the continuous expansion of port logistics, the requirements for the carrying capacity, driving stability and operating efficiency of tractors are increasing. In this context, the air suspension system has gradually become one of the core technologies to improve the performance of tractors. The air suspension controls the height of the vehicle body by adjusting the air pressure of the air spring to achieve stable support for the vehicle body, significantly improving the comfort and stability of the vehicle. Especially when carrying heavy goods, the air suspension can effectively adapt to load changes, reduce vehicle body vibration, and ensure the stable driving performance of the tractor under complex working conditions. Although the existing air suspension system of new energy port tractors has improved the performance of the vehicle to a certain extent, there are still some technical problems in actual applications that need to be further optimized and resolved.

[0003] The port environment is usually humid and high in salinity. The sea breeze and tidal action cause a large amount of silt to be exposed and dried at low tide, forming dust. During loading and unloading operations, bulk cargo (such as coal, ore, etc.) generates a large amount of dust, which further aggravates the pollution problem of the air spring system. During frequent operations, tractors are often exposed to the invasion of these pollutants. Especially under the long-term action of dust and silt, the durability and performance of the system will be significantly affected.

[0004] In order to protect the airbag of the air spring from external pollutants, a dust cover is usually installed outside the airbag. However, the gap between the dust cover and the airbag will change when the vehicle load changes, and air needs to be sucked in and exhausted between the dust cover and the airbag. During long-term movement, dust particles may enter between the dust cover and the airbag and act like sandpaper on the airbag, accelerating the wear of the airbag skin. As the wear of the airbag skin increases, the risk of gas leakage increases. At the same time, the dust cover itself may also develop small cracks due to environmental factors during long-term use. These cracks make it easier for pollutants such as dust and sand to enter the inside of the dust cover, accelerating the process of system damage.

[0005] In addition, in large container ports, tractors face constant vibration and impact due to frequent loading and unloading operations and uneven road conditions. Long-term vibration can cause fatigue of the internal structure of the air spring and may eventually lead to rupture. Especially during transportation, the load on the air spring varies greatly. These factors pose great challenges to the reliability and stability of the system.

[0006] In addition, the place where the air spring is most prone to wear during use is the connection between the cover and the airbag. This is because, during vehicle operation, especially under conditions such as cornering, uphill and downhill, the relevant components of the bogie will undergo lateral or longitudinal displacement. This displacement causes friction between the upper cover and the airbag of the air spring, resulting in a gap and causing air leakage. If the heights at both ends of the air spring are inconsistent, the vehicle may tilt, thereby increasing the friction inside the air spring. When the vehicle turns, under the action of lateral centrifugal force, the relative movement trend between the airbag and the upper cover becomes more obvious, resulting in increased friction. Under long-term action, the rubber at the friction point will age, and the sealing performance will gradually decrease, which may eventually lead to air leakage. Summary of the invention

[0007] The purpose of the present invention is to prolong the service life, reduce the occurrence of failures, and improve driving safety and operating efficiency.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an air rear suspension of a new energy port tractor, comprising a bag-type air spring and a spring shock absorber, wherein the bag-type air spring and the spring shock absorber are respectively provided with a crossbeam and a frame on the upper and lower sides, and an air compressor and an air storage tank which are interconnected are fixed to the frame;

[0009] The bag-type air spring includes a dust cover, an upper cover plate and a lower cover plate. The upper cover plate is provided with a zigzag through hole. A main air bag is provided in the dust cover. Auxiliary air bags are provided on both the upper and lower sides of the main air bag. Both the auxiliary air bag and the dust cover are provided with magnetic strips. An adhesive bag is provided in the main air bag.

[0010] The spring shock absorber includes a fixed rod and a moving rod. The moving rod is inserted into the inner cavity of the fixed rod and fixedly connected to the shock absorbing spring. The fixed rod is provided with a distance sensor and a pressure sensor. The fixed rod is provided with a blowing hole with a valve.

[0011] The air storage tank is communicated with the fixing rod, and the fixing rod is respectively communicated with the main air bag and the auxiliary air bag through a pipeline with an electric valve.

[0012] As a further description of the above technical solution: the upper cover plate is connected to the upper fixing seat by bolts, the upper fixing seat is fixedly connected to the cross beam by bolts, the lower cover plate is connected to the lower fixing seat by bolts, and the lower fixing seat is connected to the frame by bolts.

[0013] As a further description of the above technical solution: the dust cover is connected to the upper cover plate and the lower cover plate through a buckle, the zigzag through hole is inlaid with a dustproof mesh plate, and the shock-absorbing spring is fixedly connected to the inner cavity wall of the fixing rod.

[0014] As a further description of the above technical solution: the main airbag is connected to a main air inlet pipe that passes through the upper cover plate, the auxiliary airbag is fixed with an auxiliary air inlet pipe that passes through the main airbag, the upper cover plate and the lower cover plate, and the fixing rod is provided with a first air outlet pipe and a second air outlet pipe.

[0015] As a further description of the above technical solution: the main air intake pipe and the auxiliary air intake pipe are connected to the first air outlet pipe and the second air outlet pipe respectively through pipes with electric valves, and a mounting plate is provided outside the fixing rod, and the mounting plate is fixedly connected to the distance sensor.

[0016] As a further description of the above technical solution: the crossbeam is fixed with a first electric valve, an air filling pipe is arranged outside the fixing rod, and two ends of the first electric valve are connected with the air filling pipe and the air storage tank through pipelines respectively.

[0017] As a further description of the above technical solution: the fixed rod is fixed with an upper support by bolts, the upper support is connected to the cross beam by bolts, the movable rod is connected to the frame by bolts, a dustproof net is inlaid at the blowing hole, and a second electric valve connected to the blowing hole is fixed in the inner cavity of the fixed rod.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. Through the synergistic effect of the bag-type air spring and the spring shock absorber, the vibration caused by uneven roads or load fluctuations can be effectively absorbed and reduced during the vehicle's driving. The bag-type air spring adjusts the vehicle height according to the gas pressure, while the spring shock absorber absorbs the vibration fluctuation. The combined effect of the two can greatly improve the comfort and stability of the vehicle's driving, especially in high-load scenarios such as port tractors. It can ensure that the vehicle body always maintains the optimal height, reduce interference with the driver, and improve driving safety and comfort.

[0020] 2. The bag-type air spring is equipped with an external dust cover, which can not only prevent dust, mud and other pollutants from entering the airbag, but also effectively protect the air spring from the external environment. This protective design extends the service life of the air spring and reduces the probability of failure of the air spring due to accumulation of pollutants. The dust cover is made of highly wear-resistant and corrosion-resistant materials and has strong pressure resistance. It can cope with the harsh conditions that may occur in the complex and changeable port environment, thereby ensuring the long-term and stable operation of the vehicle.

[0021] 3. By installing air blowing holes and dust-proof nets on the fixed rod, when the main airbag or auxiliary airbag is exhausted, the exhaust airflow can be blown through the air blowing holes and clean the dust on the distance sensor by opening and closing the valve, ensuring that the sensor always maintains a good working condition. The exhaust process not only ensures that the vehicle can smoothly adjust the height, but also effectively prevents dust from accumulating on the sensor and affecting the detection results, thereby ensuring the accuracy and efficiency of the distance sensor.

[0022] 4. The zigzag through hole provides a ventilation channel, allowing external air to enter the cavity between the dust cover and the main airbag. The design of the zigzag through hole adopts a zigzag shape, so that the airflow will be turned back when passing through the hole, thereby achieving the dust-proof function. The zigzag through hole can effectively block dust, mud and other particles from entering between the main airbag and the dust cover, thereby protecting the main airbag from external pollutants and extending its service life.

[0023] 5. When the side of the main airbag close to the cover is damaged, the auxiliary airbag inflates. The auxiliary airbag can be fixed in a position close to the cover with the help of a magnetic strip, ensuring that the auxiliary airbag can quickly drive the bag skin of the main airbag close to the cover. The adhesive bag inside the main airbag automatically ruptures under the squeezing of the auxiliary airbag and releases the adhesive. The adhesive bonds the main airbag and the auxiliary airbag together, which can quickly block the gas leakage from the side of the main airbag close to the cover. This design not only effectively extends the service life of the main airbag, but also prevents gas leakage when the main intake pipe and the pipe connected to the main intake pipe are damaged.

[0024] 6. When the side of the main airbag close to the dust cover is damaged, after the adhesive bonds the main airbag and the auxiliary airbag together, the two auxiliary airbags continue to move closer to each other, the gas in the main airbag is squeezed and discharged from the damaged position, and then the support system formed by the two auxiliary airbags continues to support the height of the vehicle body. The auxiliary airbag replaces the function of the main airbag, and the main airbag serves as an external protective layer of the auxiliary airbag, thereby reducing further damage to the external environment and ensuring the continued stability of the air suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A front view of the present invention is shown;

[0026] Figure 2 A perspective view of the present invention is shown;

[0027] Figure 3 A front plan cross-sectional view of a bag-type air spring of the present invention is shown;

[0028] Figure 4 The present invention is shown Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 A front plan cross-sectional view of a spring shock absorber of the present invention is shown;

[0030] Figure 6 A perspective view of a spring shock absorber of the present invention is shown;

[0031] Figure 7 An exploded view of the bag-type air spring of the present invention is shown.

[0032] Legend:

[0033] 10. crossbeam; 11. frame; 12. air compressor; 13. air storage tank; 14. first electric valve;

[0034] 20. Bag-type air spring; 21. Dust cover; 22. Upper cover; 221. Zigzag through hole; 222. Dust screen; 23. Lower cover; 24. Main air bag; 241. Main air intake pipe; 25. Auxiliary air bag; 251. Auxiliary air intake pipe; 26. Upper fixing seat; 27. Lower fixing seat; 28. Magnetic strip; 29. ​​Adhesive bag;

[0035] 30. Spring shock absorber; 31. Fixing rod; 311. Blowing hole; 312. First air outlet pipe; 313. Second air outlet pipe; 314. Mounting plate; 315. Inflating pipe; 316. Second electric valve; 32. Moving rod; 33. Shock-absorbing spring; 34. Distance sensor; 35. Upper support; 36. Pressure sensor. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 7 The present invention provides an air rear suspension for a new energy port tractor, comprising a crossbeam 10, a frame 11, a capsule air spring 20 and a spring shock absorber 30. The crossbeam 10 and the frame 11 are respectively arranged on the upper and lower sides of the capsule air spring 20 and the spring shock absorber 30. The capsule air spring 20 controls the height of the vehicle body by adjusting the pressure of the gas. The spring shock absorber 30 reduces the transmission of vibration by absorbing the impact force of the vehicle body caused by uneven road surface or load fluctuation. The spring shock absorber 30 works together with the capsule air spring 20 to reduce the vibration of the vehicle body and ensure the comfort and stability of the vehicle body.

[0038] The vehicle frame 11 is fixed with an air compressor 12 and an air tank 13 which are interconnected. The function of the air compressor 12 is to provide a continuous supply of high-pressure gas. When the vehicle is driving normally, the air compressor 12 sucks in external air through its air intake port, and after high-pressure compression, the compressed air is transported to the air tank 13. The air tank 13 serves as a temporary storage unit for gas, and can store excess air when the vehicle demand is low. When the bag-type air spring 20 needs more air, the air tank 13 will quickly transport the compressed air therein to the bag-type air spring 20 through a pipeline, so as to help the bag-type air spring 20 return to the set support height.

[0039] Furthermore, when the air compressor 12 fails, the compressed air stored in the air tank 13 will play a crucial emergency role. The air tank 13 can not only provide a short-term air source for the bag-type air spring 20, but also maintain the height stability of the vehicle body when the air compressor 12 cannot be started. This can ensure the driving safety of the tractor in an emergency and avoid the vehicle height being out of control due to the failure of the bag-type air spring 20, which affects the driver's control. At the same time, the existence of the air tank 13 can also effectively reduce the number of frequent starts and stops of the air compressor 12 and extend its service life.

[0040] During operation, the air compressor 12 starts and begins to inhale external air. The compressed high-pressure gas is transported to the air tank 13 through a pipeline and stored for standby use. When the air pressure of the bag-type air spring 20 needs to be adjusted, the air tank 13 transports the required gas to the bag-type air spring 20. The air compressor 12 automatically stops after the air pressure in the air tank 13 reaches the set value. If the air compressor 12 fails, the compressed air in the air tank 13 will be automatically supplied to the bag-type air spring 20 to maintain the height of the vehicle body.

[0041] The bag-type air spring 20 includes a dust cover 21, an upper cover plate 22 and a lower cover plate 23. The dust cover 21 is installed on the outside of the air spring as a protective structure. Its function is to prevent external dust, mud and other debris from damaging the main air bag 24. The dust cover 21 is made of wear-resistant material, has good elasticity and corrosion resistance, and can resist the influence of the external environment. In the vertical movement, the dust cover 21 changes shape with the expansion and contraction of the main air bag 24, thereby maintaining the sealing and stability of the air bag system.

[0042] The upper cover plate 22 and the lower cover plate 23 are respectively located at the upper and lower ends of the main airbag 24, and are connected to the frame 11 and the crossbeam 10 by a fixed connection. A zigzag through hole 221 is provided in the upper cover plate 22. The zigzag through hole 221 is designed to provide a ventilation channel so that external air can enter the cavity between the dust cover 21 and the main airbag 24. The design of the zigzag through hole 221 adopts a zigzag shape, so that the airflow will be turned back when passing through the hole to achieve a dust-proof function. The zigzag through hole can effectively block dust, mud and other particles from entering the interior of the airbag, thereby protecting the main airbag 24 from external pollutants and extending its service life.

[0043] The main airbag 24 is fixed to the cover plate by means of screw fastening and pressure self-sealing. The function of the main airbag 24 is to adjust the height of the vehicle body according to the change of air pressure and to absorb the impact and vibration of the vehicle during driving. Auxiliary airbags 25 are provided on the upper and lower sides of the inner cavity of the main airbag 24. Under normal circumstances, the auxiliary airbag 25 is in an uninflated state and does not participate in the work of the main airbag 24, and the bag skin of the auxiliary airbag 25 does not contact the inner cavity wall of the main airbag 24.

[0044] When the main airbag 24 is damaged or leaks, the two auxiliary airbags 25 expand rapidly from the inner cavity of the main airbag 24 close to the upper cover 22 and the lower cover 23 by inflation. First, the bag skin of the main airbag 24 is tightly attached to the upper cover 22 and the lower cover 23, and then the two auxiliary airbags 25 gradually approach each other until the two auxiliary airbags 25 touch and support the entire main airbag 24, thereby maintaining the stability of the vehicle body height.

[0045] Magnetic strips 28 are installed on both the auxiliary airbag 25 and the dust cover 21, so that when the auxiliary airbag 25 is inflated, the magnetic strips 28 on the auxiliary airbag 25 and the magnetic strips 28 on the dust cover 21 are attracted to each other, so that the auxiliary airbag 25 is secured in a designated position during the expansion process. When the auxiliary airbag 25 is not inflated, there is a large distance between the magnetic strips 28 on the auxiliary airbag 25 and the dust cover 21, and they will not be accidentally adsorbed together.

[0046] The main airbag 24 is provided with an adhesive bag 29 inside. The adhesive bag 29 is used to seal by releasing the adhesive when the main airbag 24 is damaged. When the auxiliary airbag 25 is inflated, the auxiliary airbag 25 is adsorbed together with the magnetic strip 28 on the dust cover 21 through the main airbag 24. The upper and lower auxiliary airbags 25 expand toward the upper cover plate 22 and the lower cover plate 23 respectively. The auxiliary airbag 25 squeezes the main airbag 24, so that the bag skin of the main airbag 24 is tightly attached to the surface of the two cover plates, and the auxiliary airbag 25 is pressed by the two cover plates. The adhesive bag 29 located in the inner cavity of the main airbag 24 is broken, and the adhesive in the adhesive bag 29 bonds the main airbag 24 and the two auxiliary airbags 25 together, and the damaged area located at the cover plate is sealed from the inside of the main airbag 24 to prevent air leakage from the damaged areas on the upper and lower sides of the main airbag 24. In addition, in this process, the main air intake pipe 241 of the main airbag 24 is also sealed. If the main air intake pipe 241 or the pipe connected to the main air intake pipe 241 is damaged, the gas in the main airbag 24 will not leak out from the main air intake pipe 241 and its pipe.

[0047] Because the two auxiliary airbags 25 are close to the upper cover plate 22 and the lower cover plate 23, when the contact surface between the main airbag 24 and the upper cover plate 22 and the lower cover plate 23 is damaged, the damaged part can be quickly sealed to prevent the gas in the main airbag 24 from further flowing out. At this time, the main airbag 24 can still continue to work. At this time, the height of the vehicle body can be adjusted by adjusting the amount of gas in the auxiliary airbag 25.

[0048] If the main airbag 24 leaks on one side close to the dust cover 21, the operating steps are the same as above. After the main airbag 24 and the two auxiliary airbags 25 are adhered together, the auxiliary airbags 25 are inflated to move closer to each other, and the air in the main airbag 24 is squeezed and discharged from the damaged position. Then the support system formed by the two auxiliary airbags 25 continues to support the vehicle body height. The auxiliary airbag 25 replaces the function of the main airbag 24. At the same time, the main airbag 24 serves as an external protective layer of the auxiliary airbag 25, thereby reducing further damage to the external environment and ensuring the continuous stability of the air suspension.

[0049] During operation, the air compressor 12 compresses the air into the air tank 13, and the gas in the air tank 13 enters the main airbag 24 through the pipeline, and the main airbag 24 expands to adjust the height of the vehicle body, and the dust cover 21 expands and contracts accordingly. The tortuous through hole 221 ensures the circulation of air and effectively filters the external dust to protect the main airbag 24. The auxiliary airbag 25 remains in an uninflated state and does not interfere with the normal operation of the main airbag 24; when the main airbag 24 is damaged or leaks, the auxiliary airbag 25 is inflated and expanded, and the auxiliary airbag 25 will prop up the main airbag 24, so that the vehicle's air suspension system can still work normally and ensure stable driving of the vehicle. In this process, the dust cover 21 provides effective protection to prevent external pollutants from entering the interior of the airbag.

[0050] The spring shock absorber 30 includes a fixed rod 31 and a movable rod 32. The core function of the spring shock absorber 30 is to absorb the vibration generated by the vehicle body during driving. The movable rod 32 is inserted into the inner cavity of the fixed rod 31 and fixedly connected to the shock absorbing spring 33 fixed in the inner cavity of the fixed rod 31.

[0051] During operation, when the vehicle is traveling on an uneven road and the vehicle body is impacted, the moving rod 32 of the spring shock absorber 30 will move toward the inside of the fixed rod 31, and the shock absorbing spring 33 will be compressed accordingly. The compression process of the shock absorbing spring 33 plays a buffering role, absorbing the vibration from the uneven ground and preventing the vehicle from excessive vibration.

[0052] The fixing rod 31 is connected to the air tank 13 through a pipeline, and the fixing rod 31 is respectively connected to the main airbag 24 and the auxiliary airbag 25 through pipelines with electric valves. When the vehicle is driving, the air compressor 12 sends compressed air into the air tank 13, and the compressed air in the air tank 13 is transported to the fixing rod 31 through a pipeline. The inner cavity of the fixing rod 31 is sealed to ensure that the gas will not leak.

[0053] During operation, under normal circumstances, the gas in the fixing rod 31 is sent to the main airbag 24 through a pipeline. The main airbag 24 adjusts the height of the vehicle body according to the air pressure. When the main airbag 24 expands, the height of the vehicle body increases. When the main airbag 24 contracts, the height of the vehicle body decreases. When the main airbag 24 is damaged and gas leaks, the main airbag 24 and the spring shock absorber 30 cannot support the height of the vehicle under the action of the weight of the vehicle body. The spring shock absorber 30 and the main airbag 24 that has not completely leaked will slow down the moving speed of the crossbeam 10 toward the frame 11 to prevent large vibrations.

[0054] A distance sensor 34 is provided outside the fixed rod 31. The distance sensor 34 is used to monitor the height of the vehicle body from the ground in real time and adjust the air suspension system according to the change in the height of the vehicle body; the spring shock absorber 30 is provided with a telescopic distance sensor, which can directly measure the telescopic distance of the moving rod 32 in the inner cavity of the fixed rod 31, thereby providing the control system with more accurate vehicle height information. The telescopic distance sensor can effectively solve the problem of errors in the distance sensor 34 caused by the telescopic shock absorber 30 during the telescopic shock absorption. Specifically, through the real-time data provided by the telescopic distance sensor, the control system can accurately know the telescopic amount of the shock-absorbing spring 33. The control system compares the telescopic data with the feedback value of the distance sensor 34. When the spring shock absorber 30 is telescoped, the system corrects the output signal of the distance sensor 34 according to the telescopic amount.

[0055] A blowing hole 311 is opened on the outside of the fixed rod 31, and a dustproof net is inlaid at the blowing hole 311. A second electric valve 316 connected with the blowing hole 311 is fixed to the inner cavity of the fixed rod 31. When the main airbag 24 or the auxiliary airbag 25 needs to be exhausted to lower the height of the vehicle body, the second electric valve 316 is opened, and the gas in the main airbag 24 or the auxiliary airbag 25 and the fixed rod 31 will be discharged from the blowing hole 311. The exhausted gas blows through the distance sensor 34 to clean the dust on the distance sensor 34, thereby ensuring that the dust will not affect the detection result of the distance sensor 34.

[0056] Furthermore, the upper cover plate 22 is connected to the upper fixing seat 26 by bolts, the upper fixing seat 26 is fixedly connected to the cross beam 10 by bolts, the lower cover plate 23 is connected to the lower fixing seat 27 by bolts, and the lower fixing seat 27 is connected to the frame 11 by bolts.

[0057] The dust cover 21 is connected to the upper cover plate 22 and the lower cover plate 23 by snaps, ensuring that the bag-type air spring 20 is protected from external pollutants such as dust and sand during operation. The main function of the dust cover 21 is to protect the main air bag 24 from damage to its material caused by the external environment. The cavity formed between the dust cover 21 and the main air bag 24 adjusts the cavity air pressure through the ventilation effect of the tortuous through hole 221 during the extension and contraction process of the air spring.

[0058] The dustproof mesh plate 222 inlaid with the zigzag through hole 221 works together with the zigzag through hole 221 to effectively filter dust and impurities entering the cavity from the outside, ensuring smooth airflow while avoiding damage to the main airbag 24 by external pollutants. The material of the dustproof mesh plate 222 is a high-strength material with good air permeability and not easy to accumulate dust, which can ensure long-term use without affecting its filtering effect.

[0059] Furthermore, the fixing rod 31 is fixed with an upper support 35 by bolts, the upper support 35 is connected to the cross beam 10 by bolts, the moving rod 32 is connected to the frame 11 by bolts, and a dustproof net is embedded in the air blowing hole 311.

[0060] A first electric valve 14 is fixed to the crossbeam 10, and an air filling pipe 315 is provided outside the fixed rod 31. Both ends of the first electric valve 14 are connected to the air filling pipe 315 and the air tank 13 through pipelines respectively. The first electric valve 14 controls the compressed gas in the air tank 13 to enter the fixed rod 31. The function of the first electric valve 14 is to accurately control the flow of gas, adjust the time and amount of gas filling and discharge, and maintain the normal working state of the bag type air spring 20.

[0061] Furthermore, the main airbag 24 is connected to a main air intake pipe 241 that passes through the upper cover 22, and the auxiliary airbag 25 is fixed with an auxiliary air intake pipe 251 that passes through the main airbag 24 and the upper cover 22. The separate pipe design of the main airbag 24 and the auxiliary airbag 25 allows the two airbags to work independently, thereby improving the safety and flexibility of the system. When the main airbag 24 is damaged or leaks, the auxiliary airbag 25 will intervene to fill the lost function of the main airbag 24 and ensure that the vehicle maintains a normal suspension height.

[0062] The fixed rod 31 is provided with a first air outlet pipe 312 and a second air outlet pipe 313. The main air inlet pipe 241 and the auxiliary air inlet pipe 251 are respectively connected to the first air outlet pipe 312 and the second air outlet pipe 313 through pipes with electric valves. A mounting plate 314 is provided outside the fixed rod 31. The mounting plate 314 is fixedly connected to the distance sensor 34. The function of the mounting plate 314 is to provide a stable mounting base for the distance sensor 34. A pressure sensor 36 is provided inside the fixed rod 31.

[0063] When the main airbag 24 is working normally, after the main airbag 24 is fully inflated, the first electric valve 14 is closed, and the main airbag 24 and the fixing rod 31 are still connected through the pipeline; when the system needs to be exhausted, the electric valve of the blowing hole 311 is opened, and the gas is discharged through the blowing hole 311, reducing the pressure inside the airbag, but the pressure sensor 36 will not respond at this time.

[0064] The pressure sensor 36 will not respond to the exhaust action of the blowing hole 311 during normal operation. Only when the electric valve of the blowing hole 311 is closed, and the pressure sensor 36 detects that the gas pressure in the inner cavity of the main airbag 24 and the fixed rod 31 has abnormal fluctuations (such as a sharp drop in pressure), the electric valve on the connecting pipe between the fixed rod 31 and the auxiliary airbag 25 will open, the auxiliary airbag 25 will inflate, and the auxiliary airbag 25 will break the adhesive bag 29, sealing the contact surface between the main airbag 24 and the upper cover plate 22 and the lower cover plate 23, thereby sealing the main air intake pipe 241 and its pipe, and the electric valve on the pipe from the fixed rod 31 to the main airbag 24 is also closed, and the auxiliary airbag 25 replaces the main airbag 24 to form a new support system.

[0065] During the expansion of the auxiliary airbag 25, in order to ensure that the distance they approach each other is greater than the expansion distance toward the upper cover plate 22 and the lower cover plate 23, the magnetic strip 28 of the auxiliary airbag 25 is designed to be close to the position of the two side covers. In the initial stage of expansion, after the auxiliary airbag 25 begins to inflate, it extends evenly to the surroundings. As there is still residual gas inside the main airbag 24 and the weight of the vehicle body presses the covers on both sides to move closer to each other, the auxiliary airbag 25 is close to the covers on both sides. After the magnetic strip 28 on the outer circle of the auxiliary airbag 25 produces magnetic adsorption with the magnetic strip 28 on the dust cover 21, the auxiliary airbag 25 is firmly fixed in the designated position to prevent position displacement during the expansion process.

[0066] As the auxiliary airbag 25 continues to expand, the two auxiliary airbags 25 move upward and downward, and the two auxiliary airbags 25 move toward the upper cover plate 22 and the lower cover plate 23, gradually squeezing the adhesive bag 29 in the inner cavity of the main airbag 24. Under the pressure of the residual gas in the main airbag 24 and the cover plates on both sides, the adhesive bag 29 is fully compressed and then ruptures, and the adhesive is released. The main airbag 24 and the auxiliary airbag 25 are firmly bonded together. At this time, if the damaged part is located on one side of the cover plate, the main airbag 24 can continue to maintain normal function.

[0067] If the damage is located on the side of the main airbag 24, the secondary airbags 25 will continue to inflate and gradually approach each other. The gas in the main airbag 24 is squeezed and discharged from the damaged side. As the gas is completely discharged, the two secondary airbags 25 replace the supporting function of the main airbag 24 to form a stable supporting structure.

[0068] Furthermore, the adhesive capsule 29 should be made of a material that is highly tough, easy to break and does not form sharp fragments, such as an elastic film polymer or a thermoplastic elastomer (such as TPU or TPV), which can withstand a certain pressure when expanded and compressed, and produce a controllable rupture effect when reaching a critical point without forming sharp fragments.

[0069] In addition, a specific bursting point or weak area is preset on the adhesive capsule 29 so that it can rupture along a preset direction. For example, a "cross" or "V" shaped rupture line is set on the adhesive capsule 29 to ensure that after it ruptures, the adhesive can be concentrated and flowed out between the main airbag 24 and the auxiliary airbag 25, reducing the possibility of spreading in other directions.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new energy port tractor air rear suspension, comprising a bag-type air spring (20) and a spring shock absorber (30), characterized in that: A crossbeam (10) and a vehicle frame (11) are respectively provided on the upper and lower sides of the bag-type air spring (20) and the spring shock absorber (30); and an air compressor (12) and an air storage tank (13) which are interconnected are fixed to the vehicle frame (11); The bag-type air spring (20) comprises a dust cover (21), an upper cover plate (22) and a lower cover plate (23); the upper cover plate (22) is provided with a zigzag through hole (221); a main air bag (24) is provided in the dust cover (21); auxiliary air bags (25) are provided on both upper and lower sides of the main air bag (24); the auxiliary air bag (25) and the dust cover (21) are provided with magnetic strips (28); and an adhesive bag (29) is provided in the main air bag (24); The spring shock absorber (30) comprises a fixed rod (31) and a movable rod (32), wherein the movable rod (32) is inserted into the inner cavity of the fixed rod (31) and fixedly connected to the shock absorbing spring (33), the fixed rod (31) is provided with a distance sensor (34) and a pressure sensor (36), and an air blowing hole (311) with a valve is opened outside the fixed rod (31); The air storage tank (13) is communicated with the fixing rod (31), and the fixing rod (31) is communicated with the main air bag (24) and the auxiliary air bag (25) respectively through a pipeline with an electric valve.

2. The air rear suspension of a new energy port tractor according to claim 1 is characterized by: The upper cover plate (22) is connected to the upper fixing seat (26) by bolts, the upper fixing seat (26) is fixedly connected to the cross beam (10) by bolts, the lower cover plate (23) is connected to the lower fixing seat (27) by bolts, and the lower fixing seat (27) is connected to the vehicle frame (11) by bolts.

3. The air rear suspension of a new energy port tractor according to claim 1 is characterized by: The dust cover (21) is connected to the upper cover plate (22) and the lower cover plate (23) via buckles, the zigzag through hole (221) is inlaid with a dust screen plate (222), and the shock absorbing spring (33) is fixedly connected to the inner cavity wall of the fixing rod (31).

4. The air rear suspension of a new energy port tractor according to claim 1 is characterized by: The main air bag (24) is connected to a main air inlet pipe (241) penetrating the upper cover plate (22); the auxiliary air bag (25) is fixed with an auxiliary air inlet pipe (251) penetrating the main air bag (24), the upper cover plate (22) and the lower cover plate (23); and the fixing rod (31) is provided with a first air outlet pipe (312) and a second air outlet pipe (313).

5. The air rear suspension of a new energy port tractor according to claim 4 is characterized in that: The main air intake pipe (241) and the auxiliary air intake pipe (251) are respectively connected to the first air outlet pipe (312) and the second air outlet pipe (313) through pipelines with electric valves. A mounting plate (314) is provided outside the fixing rod (31), and the mounting plate (314) is fixedly connected to the distance sensor (34).

6. The air rear suspension of a new energy port tractor according to claim 1 is characterized by: The crossbeam (10) is fixed with a first electric valve (14), and an air charging pipe (315) is arranged outside the fixing rod (31), and two ends of the first electric valve (14) are respectively connected with the air charging pipe (315) and the air storage tank (13) through pipelines.

7. The air rear suspension of a new energy port tractor according to claim 1 is characterized by: The fixed rod (31) is fixed with an upper support (35) by bolts, the upper support (35) is connected to the cross beam (10) by bolts, the movable rod (32) is connected to the frame (11) by bolts, a dustproof net is embedded in the blowing hole (311), and a second electric valve (316) connected to the blowing hole (311) is fixed in the inner cavity of the fixed rod (31).

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