Wearable portable air supply system and wearable device

Abstract

The present invention belongs to the technical field related to air supply equipment, and discloses a wearable portable air supply system and wearable device. The air supply system includes a back plate, a frame, an air pump, an air pump suspension shock absorption mechanism, a pneumatic leaf spring variable stiffness mechanism, and a pneumatic shock-absorbing ring variable stiffness mechanism; the back plate includes a back side plate and a base, one end of the back side plate is connected to the base, and the base is connected to the connecting plate at the bottom of the frame through a pneumatic leaf spring variable stiffness mechanism; the back side plate is connected to the side of the frame through a pneumatic shock-absorbing ring variable stiffness mechanism; the air pump is connected to the frame through an air pump suspension shock absorption mechanism; and a cylindrical roller bearing is provided between the connecting plate and the inner wall of the base. The present invention adopts a multi-stage vibration reduction and silencing mode to reduce vibration under different environmental conditions. Compared with a single-stiffness shock absorption system, it can achieve a more suitable shock absorption effect under different vibration conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field related to air supply equipment, and more specifically, relates to a wearable portable air supply system and a wearable device. Background Art

[0002] With the advancement of technology, various electronic components and sensor devices have been miniaturized, and wearable devices are gradually becoming popular. Among them, lightweight pneumatic wearable devices such as soft prosthetic hands and soft rehabilitation robots provide opportunities for disabled patients and the elderly to resume daily life. However, the air supply system that provides compressed air to pneumatic devices is too large, and the vibration and noise generated by the pump during operation are too high. Therefore, how to make the air supply system wearable and comfortable has become a challenge.

[0003] To address pump vibration, traditional industry practices use bolts to secure the pump to a high-mass frame, leveraging the frame's inertia to dampen vibrations. However, this method can easily lead to noise from the pump colliding with the frame when the pump is not securely secured, and can also cause fatigue damage to the connectors. To address this, patent CN114483541A proposes a suspended inflation device that uses springs to suspend the pump, preventing it from colliding with the frame during operation and achieving noise reduction. However, this device cannot adjust the output pressure, and the shock-absorbing spring has limited ability to absorb high-frequency vibrations. Furthermore, to address the issue of the large volume of the air supply system, patent CN107242958 proposes a glove system that incorporates a backpack air supply device. This device achieves a compact design and is used to supply air to pneumatic exoskeletons. However, this device lacks shock and noise reduction treatment, resulting in significant noise and vibration during use, making it difficult to guarantee wearing comfort. Summary of the Invention

[0004] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides a wearable portable air supply system and a wearable device, which adopts a multi-stage vibration reduction and silencer mode to weaken the vibration under different environmental conditions. Compared with the single stiffness shock absorption system, it can achieve a more suitable shock absorption effect under different vibration conditions.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, a wearable portable air supply system is provided, which includes a back plate, a frame, an air pump, an air pump suspension shock absorption mechanism, a pneumatic leaf spring variable stiffness mechanism and a pneumatic shock absorption ring variable stiffness mechanism; the back plate includes a back side plate and a base, one end of the back side plate is connected to the base, and the base is connected to the connecting plate at the bottom of the frame through the pneumatic leaf spring variable stiffness mechanism; the back side plate is connected to the side of the frame through the pneumatic shock absorption ring variable stiffness mechanism; the air pump is connected to the frame through the air pump suspension shock absorption mechanism; a cylindrical roller bearing is arranged between the connecting plate and the inner wall of the base.

[0006] Furthermore, the end with greater thickness among the two opposite ends of the variable thickness leaf spring is a first end, and the other end is a second end, and the first end and the second end are respectively connected to the base and the damping rubber pad.

[0007] Furthermore, the pneumatic leaf spring variable stiffness mechanism includes an uneven variable thickness leaf spring, a leaf spring prestressing rod, a rubber damping pad, a pneumatic piston cylinder, a push spring, a connecting pipe and a push rod; one end of the variable thickness leaf spring is fixed on the base, and the other end is connected to one end of the leaf spring prestressing rod through a damping rubber pad, and the other end of the leaf spring prestressing rod is fixed on the base; the connecting plate is in contact with the variable thickness leaf spring; a cavity is formed on the base, one end of the pneumatic piston cylinder is connected to the cavity wall of the cavity, and is connected to the air outlet of the air supply system through the connecting pipe; one end of the push rod is movably connected to the variable thickness leaf spring, and the other end is connected to the piston of the pneumatic piston cylinder; the push spring is arranged in the pneumatic piston cylinder, and it is sleeved on the push rod.

[0008] Furthermore, the air pump suspension shock-absorbing mechanism includes three shock-absorbing balls and a connecting part, the connecting part includes a flat plate and an L-shaped plate, the two ends of the shock-absorbing ball are respectively connected to the flat plate and one end of the L-shaped plate, the flat plate is connected to the frame, and the air pump is connected to the other end of the L-shaped plate.

[0009] Furthermore, the pneumatic shock-absorbing ring variable stiffness mechanism includes a plurality of variable stiffness shock-absorbing rings, and the variable stiffness shock-absorbing rings are connected to the frame and the back side plates.

[0010] Furthermore, the variable stiffness shock-absorbing ring includes an outer ring of the shock-absorbing ring and an inner ring of the shock-absorbing ring arranged inside the outer ring of the shock-absorbing ring; the outer ring of the shock-absorbing ring is filled with inflatable flexible material, and it is connected to the air outlet, and the vacuum degree of the inflatable flexible material in the outer ring of the shock-absorbing ring is adjusted by inflation and deflation; damping particles are arranged inside the inner ring of the shock-absorbing ring.

[0011] Furthermore, the air supply system also includes a microcontroller and a backpack, the frame is arranged inside the backpack, and a human-computer interaction control screen is arranged on the outside of the backpack; the frame is divided into multiple compartments, which are respectively used to carry the gas tank, power supply, the air pump, pressure sensor, muffler, microcontroller, electric proportional valve and vibration detector, the air pump is connected to the gas tank, and the gas tank is connected to the electric proportional valve through an oil mist separator; the electric proportional valve is connected to the air outlet; two pressure sensors are respectively connected to the gas tank and the air outlet; the microcontroller is respectively connected to the electric proportional valve, the pressure sensor, the vibration detector and the human-computer interaction control screen.

[0012] Furthermore, the microcontroller is used to separately control the stiffness of the pneumatic leaf spring variable stiffness mechanism and the pneumatic shock absorber ring variable stiffness mechanism; the number of the electrical proportional valves is the same as the number of the air outlets.

[0013] Furthermore, the inner wall and the outer wall of the frame are wrapped with sound-absorbing cotton.

[0014] The present invention also provides a wearable device, which includes the wearable portable air supply system and an actuator as described above, and the actuator is connected to the wearable portable air supply system.

[0015] In general, compared with the prior art, the wearable portable air supply system and wearable device provided by the present invention have the following beneficial effects:

[0016] 1. The base is connected to the connecting plate at the bottom of the frame via a pneumatic leaf spring variable stiffness mechanism; the back side plate is connected to the side of the frame via a pneumatic shock-absorbing ring variable stiffness mechanism; the air pump is connected to the frame via an air pump suspension shock-absorbing mechanism; a cylindrical roller bearing is provided between the connecting plate and the inner wall of the base. This adopts a multi-stage vibration reduction and silencer mode to reduce vibration under different environmental conditions. Compared with a single-stiffness shock-absorbing system, it can achieve a more suitable shock-absorbing effect under different vibration conditions.

[0017] 2. The microcontroller is respectively connected to the electric proportional valve, the pressure sensor, the vibration detector and the human-computer interaction control screen; the microcontroller can separately control the stiffness of the pneumatic leaf spring variable stiffness mechanism and the pneumatic shock absorber ring variable stiffness mechanism.

[0018] 3. The pneumatic leaf spring variable stiffness mechanism and the pneumatic shock absorber ring variable stiffness mechanism can automatically determine the vibration frequency and amplitude of the system in two different dimensions, and provide corresponding feedback through pneumatic means to change the stiffness of the shock absorber element, thereby achieving a better shock absorption effect.

[0019] 4. In response to the actual needs of people wearing air supply devices, combined with the sources of vibration and noise within the device and the load-bearing capacity of the shock-absorbing unit, and taking into account that the portable air supply device will cause the device to vibrate to varying degrees during movement, it is proposed to use a multi-stage pneumatic shock-absorbing module to cope with vibrations of different frequencies and amplitudes within the device. At the same time, since the vibration after the rigid connection between the air pump and the bracket is itself one of the main sources of air pump noise, the device also achieves significant noise reduction, and on this basis, multiple layers of sound insulation cotton are embedded to further reduce noise.

[0020] 5. To ensure safety during use, use the emergency stop switch and pressure relief protection circuit to ensure that the work can be stopped in an emergency and the pressure in the gas tank can be released in the event of an accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 (a) and (b) are respectively a three-dimensional structural schematic diagram and a partial schematic diagram of the wearable portable air supply system provided by the present invention;

[0022] Figure 2 (a) and (b) are Figure 1 Schematic diagram of the partial structure of the wearable portable air supply system at two different angles;

[0023] Figure 3 Yes Figure 1 Multi-stage shock absorption flow chart of the wearable portable air supply system;

[0024] Figure 4 a and b are Figure 1 Schematic diagram of the air pump suspension shock absorption mechanism of the wearable portable air supply system at two angles;

[0025] Figure 5 (b) in the Figure 1 Schematic diagram of the back plate and pneumatic leaf spring variable stiffness mechanism of the wearable portable air supply system, (a) is a cross-sectional view of the back plate and pneumatic leaf spring variable stiffness mechanism in (b) along the AA direction;

[0026] Figure 6 yes Figure 5 The cross-sectional view of the structure in (a) along the BB direction, i.e., the cross-sectional view of the variable stiffness mechanism of the back plate and the pneumatic shock absorber ring.

[0027] In all the drawings, the same reference numerals are used to represent the same elements or structures, wherein: 1-backpack, 2-frame, 3-gas tank, 4-power supply, 5-vibration detector, 6-air pump, 7-shock-absorbing ball, 8-pressure sensor, 9-muffler, 10-microcontroller, 11-electric proportional valve, 12-air outlet, 13-emergency stop switch, 14-human-computer interaction control screen, 15-connector, 16-back plate, 17-back side plate, 18-base, 19-variable stiffness shock-absorbing ring, 20-pipeline, 21-cylindrical roller bearing, 22-connecting plate, 23-variable thickness leaf spring, 24-leaf spring pre-compression rod, 25-rubber damping pad, 26-pneumatic piston cylinder, 27-push spring, 28-connecting pipe, 29-push rod, 30-shock-absorbing ring outer ring, 31-shock-absorbing ring inner ring. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0029] The present invention provides a wearable portable air supply system to meet the air source needs of people who use pneumatic pressurized wearable devices in daily life. It can mainly solve the vibration problem of portable air supply systems in different scenarios, while reducing noise and ensuring the safety of pressurized equipment.

[0030] See also Figure 1 and Figure 2 The air supply system includes a backpack 1, a frame 2, an air tank 3, a power supply 4, a vibration detector 5, an air pump 6, a pressure sensor 8, a muffler 9, a microcontroller 10, an electric proportional valve 11, an emergency stop switch 13, a human-computer interaction control screen 14, and a backboard 16. The backboard 16 is connected to the frame 2, and both are arranged inside the backpack 1. The vibration detector 5 is arranged on the frame 2, and the emergency stop switch 13 is arranged on the backpack 1, and they are respectively connected to the microcontroller 10. The human-computer interaction control screen 14 is arranged on the outside of the backpack 1, and the output pressure and shock absorption mode can be adjusted through the human-computer interaction control screen 14.

[0031] The frame 2 is divided into a plurality of compartments, which are used to carry the gas tank 3, the power supply 4, the air pump 6, the pressure sensor 8, the muffler 9, the microcontroller 10 and the electric proportional valve 11 respectively, thereby achieving a compact design. The compartments can be used to individually silence and reduce noise while fixing the components.

[0032] For the main vibration noise source, the inner walls of the compartments where the air pump 6 and the electric proportional valve 11 are located are respectively wrapped with sound insulation cotton, and the outer wall of the frame 2 is wrapped as a whole with a layer of sound insulation cotton. The sound insulation cotton has good sound absorption ability to achieve noise reduction.

[0033] In order to ensure the stability of the entire system during wear, the power supply 4 (lithium battery) with the largest mass and the air pump 6 with the most severe vibration are set at the bottom of the frame 2, which lowers the center of gravity and reduces the impact of vibration on the entire frame 2.

[0034] The electrical proportional valve 11 is connected to the pneumatic actuator via an outlet 12 provided on the backpack 1. Each time pressure is released, the electrical proportional valve 11 is connected to the actuator's air pipe to release compressed gas. To improve compressed gas utilization, the electrical proportional valve 11 is placed on top of the frame 2, directly connecting it to the outlet 12. This shortens the length of the air pipe connecting the electrical proportional valve 11 to the external actuator. In this embodiment, the number of outlets 12 can be set according to actual needs, such as three or four, to achieve independent control of corresponding pneumatic components.

[0035] In this embodiment, the air pump 6 is connected to the air tank 3, which is connected to the electrical proportional valve 11 via an oil mist separator. Two pressure sensors 8 are connected to the air tank 3 and the air outlet 12, respectively. The microcontroller 10 is connected to the electrical proportional valve 11, the pressure sensors 8, the vibration detector 5, and the human-computer interaction control screen 14, respectively.

[0036] See also Figure 4 Since the vibration of the piston pump is mainly caused by the high-frequency vibration during the movement of the internal plug rod piston, the first stage uses a suspended shock-absorbing ball 7 to reduce the high-frequency vibration of the air pump 6. In order to achieve the shock absorption treatment of the air pump 6, considering that the air supply system is carried on the user's back and placed vertically in the working state, the air pump 6 is vertically connected to the frame 2 through the air pump suspension shock-absorbing mechanism.

[0037] The air pump suspension shock-absorbing mechanism includes three shock-absorbing balls 7 and a connector 15. The connector 15 includes a flat plate and an L-shaped plate. The two ends of the shock-absorbing balls 7 are respectively connected to the flat plate and one end of the L-shaped plate. The flat plate is connected to the frame 2, and the air pump 6 is connected to the other end of the L-shaped plate. The two ends of the shock-absorbing balls 7 are flat and the center is spherical. The geometric centers of the three shock-absorbing balls 7 are located at the vertices of the same equilateral triangle. The air pump suspension shock-absorbing mechanism attenuates the high-frequency vibration of the air pump 6 and transmits it to the frame 2. In addition, because the sound-insulating cotton is attached to the inner wall of the compartment, even when the backpack 1 is tilted, the sound-insulating cotton in the compartment can provide side support and act as a buffer.

[0038] Although the shock-absorbing ball 7 can absorb high-frequency vibrations, it cannot bear excessive weight due to its silicone material. When the air supply system is in operation, the electric proportional valve 11 and other modules also vibrate as the charging and discharging modes switch. In addition, when the user is carrying the air supply system for movement, bumps and accelerations and decelerations will cause vibrations of different frequencies and amplitudes. To solve the above vibrations, the second and third stages both use pneumatic variable stiffness mechanisms. The second stage is a pneumatic leaf spring variable stiffness mechanism, and the third stage is a pneumatic shock-absorbing ring variable stiffness mechanism. These two-stage pneumatic variable stiffness mechanisms can automatically judge the vibration frequency and amplitude of the system in two different dimensions, and give corresponding feedback in a pneumatic manner to change the stiffness of the shock-absorbing element to weaken the vibration under different environmental conditions. Compared with the shock-absorbing system with a single stiffness, it can achieve a more suitable shock-absorbing effect under different vibration conditions.

[0039] Please refer to Figure 5 The back plate 16 includes a back side plate 17 and a base 18. One end of the rectangular back side plate 17 is connected to the base 18. The back plate 16 is connected to the connecting plate 22 of the frame 2 via a pneumatic leaf spring variable stiffness mechanism. A cylindrical roller bearing 21 capable of withstanding large radial loads is disposed between the connecting plate 22 and the inner wall of the base 18 to prevent the frame 2 from tipping over. The pneumatic leaf spring variable stiffness mechanism is disposed vertically between the connecting plate 22 and the base 18.

[0040] The pneumatic leaf spring variable stiffness mechanism includes a variable thickness leaf spring with uneven thickness, a leaf spring pre-stress rod 24, a rubber damping pad 25, a pneumatic piston cylinder 26, a push spring 27, a connecting pipe 28 and a push rod 29. The thicker end of the variable thickness leaf spring is fixed to the base 18, and the other end is connected to one end of the leaf spring pre-stress rod 24 through a damping rubber pad. The other end of the leaf spring pre-stress rod 24 is fixed to the base 18. During vibration, the rubber damping pad 25 and the leaf spring pre-stress rod 24 frictionally consume energy. The connecting plate 22 is in contact with the variable thickness leaf spring. The base 18 forms a cavity, and one end of the pneumatic piston cylinder 26 is connected to the cavity wall and is connected to the air outlet 12 through the connecting pipe 28. One end of the push rod 29 is movably connected to the variable thickness leaf spring, and the other end is connected to the piston of the pneumatic piston cylinder 26. The pushing spring 27 is disposed in the pneumatic piston cylinder 26 and sleeved on the pushing rod 29 .

[0041] When the pneumatic piston cylinder 26 is inflated or deflated through the air outlet 12, the pushing rod 29 will be pushed or pulled, and the pushing rod 29 and the roller connected to it will move together to squeeze the variable thickness leaf spring, thereby changing the pre-bending angle of the variable thickness leaf spring and changing the position of the load-bearing point, that is, the contact point between the connecting plate 22 and the variable thickness leaf spring. The thickness of the variable thickness leaf spring is uneven, which causes the thickness of the leaf spring at the load-bearing point to change accordingly, thereby achieving the purpose of the pneumatic variable leaf spring stiffness, so that a more suitable shock absorption effect can be achieved in the vertical direction and under different vibration conditions.

[0042] See also Figure 6 The back panel 17 is connected to the frame 2 via a pneumatic damping ring variable stiffness mechanism. The pneumatic damping ring variable stiffness mechanism includes a plurality of variable stiffness damping rings 19, which connect the frame 2 and the back panel 17. In this embodiment, there are three variable stiffness damping rings 19, which are arranged around the center of mass of the air supply system and connected to the air outlet 12 via a pipe 20. It will be understood that in other embodiments, the number of variable stiffness damping rings 19 can be increased or decreased according to actual needs.

[0043] The variable stiffness damping ring 19 includes an outer damping ring 30 and an inner damping ring 31 disposed within the outer damping ring 30. The outer damping ring 30 is filled with an inflatable flexible material. This inflatable flexible material can be made of silicone or rubber with fine pores, or a soft material containing cavities (filled with plastic, nylon, etc.). Damping particles are disposed within the inner damping ring 31. These particles can be made of wear-resistant metal, wear-resistant non-metal, or wear-resistant polymer materials. When the system vibrates, the damping particles rub against each other to dissipate energy.

[0044] In the direction perpendicular to the back of the back plate 16, the back side plate 17 and the connecting plate 22 are connected by multiple variable stiffness shock-absorbing rings 19. The electric proportional valve 11 can adjust the vacuum degree of the inflatable flexible material in the outer ring 30 of the shock-absorbing ring by filling and deflating air through the air outlet 12, thereby achieving the purpose of pneumatically variable shock-absorbing ring stiffness, so as to achieve a more suitable shock-absorbing effect under different vibration conditions in the dimension perpendicular to the direction of the back side plate 17.

[0045] See also Figure 3In the working state, the air pump 6 absorbs air from the muffler 9 and compresses and stores it in the air tank 3. The electric proportional valve 11 outputs compressed gas on demand after receiving the signal from the microcontroller 10. The data of the microcontroller 10 is collected by the pressure sensor 8 and the vibration detector 5. The microcontroller 10 adjusts the working state of each component of the air path according to the output pressure value set by the human-computer interaction control screen 14; the vibration monitor is used to feed back the three-dimensional vibration frequency and amplitude of the entire frame 2 to the microcontroller 10. The microcontroller 10 separately inflates and deflates multiple variable stiffness shock-absorbing elements according to the shock-absorbing mode set by the human-computer interaction interface control screen, thereby adjusting their stiffness and maximizing the shock-absorbing effect.

[0046] The human-machine interaction control panel 14 has a system switch button, plus and minus buttons, and a touch screen. By short-pressing the switch and using the plus and minus buttons, the pressure and output pressure values ​​of the gas tank 3 can be adjusted. Long-pressing the switch turns off the gas supply system. In addition, the human-machine interaction interface control panel can set the pressure operating range of the air pump 6, that is, the upper and lower thresholds of the air pump 6 can be adjusted. When the compressed air pressure in the gas tank 3 is less than the lower threshold, the air pump 6 will work. When the compressed air in the gas tank 3 is greater than the upper threshold, the air pump 6 will stop, ensuring the dynamic balance of the air pressure in the gas tank 3. The output air pressure of each electrical proportional valve 11 can be adjusted through the human-machine interaction interface control panel, and the air supply system can be customized for the specific pneumatic actuator used. The touch screen can be used in conjunction with the plus and minus buttons to control the shock absorption mode: the shock absorption mode is divided into automatic mode and manual adjustment mode. In manual adjustment mode, the stiffness of the multi-stage pneumatic variable stiffness shock absorber (including the pneumatic leaf spring variable stiffness mechanism and the pneumatic shock absorber ring variable stiffness mechanism) can be customized through the plus and minus buttons, which is suitable for a fixed working environment; in automatic adjustment mode, the microcontroller 10 will adjust the stiffness of the multi-stage pneumatic variable stiffness shock absorber in real time according to the return value of the vibration detector 5 to adapt to the real-time changing environmental conditions and maximize the shock absorption effect, such as the operator carrying the air supply system during transportation.

[0047] When the backpack 1 is in normal working condition, the system switch of the human-computer interaction control screen 14 can be used to control the micro-control board to shut down the system. In the current state, in order to ensure that it can be used directly after the next startup, residual compressed gas will be stored in the gas tank 3; but when it is necessary to stop the backpack 1 urgently or the actuator connected to the air outlet 12 fails, the emergency stop switch 13 can be pressed directly, and the system will immediately cut off the power supply 4 and use the pressure relief protection circuit to slowly discharge the compressed gas in the system. The pressure relief protection circuit is powered separately from the decision-making drive module including the microcontroller 10 to ensure reliability of use.

[0048] Since the present invention uses a stackable thin-film electrical proportional valve 11, the air supply system can supply air to multiple actuators at the same time, helping wearable pneumatic devices to assist users in completing tasks.

[0049] The present invention further provides a wearable device comprising the wearable portable air supply system and an actuator connected to the wearable portable air supply system. The actuator may be a soft finger, a robotic arm, or the like.

[0050] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wearable portable air supply system, characterized by: The air supply system includes a back plate, a frame, an air pump, an air pump suspension shock absorption mechanism, a pneumatic leaf spring variable stiffness mechanism, and a pneumatic shock absorption ring variable stiffness mechanism; the back plate includes a back side plate and a base, one end of the back side plate is connected to the base, and the base is connected to the connecting plate at the bottom of the frame through the pneumatic leaf spring variable stiffness mechanism; the back side plate is connected to the side of the frame through the pneumatic shock absorption ring variable stiffness mechanism; the air pump is connected to the frame through the air pump suspension shock absorption mechanism; a cylindrical roller bearing is provided between the connecting plate and the inner wall of the base; The pneumatic leaf spring variable stiffness mechanism includes an uneven variable thickness leaf spring, a leaf spring prestressing rod, a rubber damping pad, a pneumatic piston cylinder, a push spring, a connecting pipe and a push rod; one end of the variable thickness leaf spring is fixed to the base, and the other end is connected to one end of the leaf spring prestressing rod through a damping rubber pad, and the other end of the leaf spring prestressing rod is fixed to the base; the connecting plate is in contact with the variable thickness leaf spring; a cavity is formed on the base, one end of the pneumatic piston cylinder is connected to the cavity wall of the cavity, and is connected to the air outlet of the air supply system through the connecting pipe; one end of the push rod is movably connected to the variable thickness leaf spring, and the other end is connected to the piston of the pneumatic piston cylinder; the push spring is arranged in the pneumatic piston cylinder, and it is sleeved on the push rod.

2. The wearable portable air supply system according to claim 1, wherein: The end with larger thickness among the two opposite ends of the variable thickness leaf spring is a first end, and the other end is a second end. The first end and the second end are respectively connected to the base and the damping rubber pad.

3. The wearable portable air supply system according to claim 1, wherein: The air pump suspension shock absorption mechanism includes three shock-absorbing balls and a connecting part, the connecting part includes a flat plate and an L-shaped plate, the two ends of the shock-absorbing ball are respectively connected to the flat plate and one end of the L-shaped plate, the flat plate is connected to the frame, and the air pump is connected to the other end of the L-shaped plate.

4. The wearable portable air supply system according to claim 2, wherein: The pneumatic shock-absorbing ring variable stiffness mechanism includes a plurality of variable stiffness shock-absorbing rings, and the variable stiffness shock-absorbing rings are connected to the frame and the back side plates.

5. The wearable portable air supply system according to claim 4, wherein: The variable stiffness shock-absorbing ring includes an outer ring of the shock-absorbing ring and an inner ring of the shock-absorbing ring arranged inside the outer ring of the shock-absorbing ring; the inner ring of the shock-absorbing ring is filled with an inflatable flexible material, and is connected to the air outlet, and the vacuum degree of the inflatable flexible material in the outer ring of the shock-absorbing ring is adjusted by inflation and deflation; damping particles are arranged inside the inner ring of the shock-absorbing ring.

6. The wearable portable air supply system according to claim 5, wherein: The air supply system also includes a microcontroller and a backpack. The frame is arranged inside the backpack, and a human-computer interaction control screen is arranged on the outside of the backpack. The frame is divided into multiple compartments, which are used to carry the gas tank, power supply, the air pump, pressure sensor, muffler, microcontroller, electric proportional valve and vibration detector respectively. The air pump is connected to the gas tank, and the gas tank is connected to the electric proportional valve through an oil mist separator; the electric proportional valve is connected to the air outlet; two pressure sensors are respectively connected to the gas tank and the air outlet; the microcontroller is respectively connected to the electric proportional valve, the pressure sensor, the vibration detector and the human-computer interaction control screen.

7. The wearable portable air supply system according to claim 6, wherein: The microcontroller is used to separately control the stiffness of the pneumatic leaf spring variable stiffness mechanism and the pneumatic shock absorber ring variable stiffness mechanism; the number of the electric proportional valves is the same as the number of the air outlets.

8. The wearable portable air supply system according to any one of claims 1 to 7, wherein: The inner wall and the outer wall of the frame are both wrapped with sound-absorbing cotton.

9. A wearable device, characterized in that: The wearable device includes the wearable portable air supply system and an actuator according to any one of claims 1 to 8, and the actuator is connected to the wearable portable air supply system.

Images