A mobile AC / DC power supply system

Abstract

This utility model provides a mobile AC / DC power supply system, belonging to the field of AC / DC power supply technology; it includes: an AC / DC power supply device body, with storage slots on both sides of the AC / DC power supply device body, the bottom of the storage slots communicating with the bottom of the AC / DC power supply device body; and two mounting plates, which are slidably disposed within the storage slots, the length of the mounting plates being adapted to the storage slots. This utility model, through the cooperation of the storage slots on both sides of the AC / DC power supply device body, the mounting plates, and the pneumatic transmission system, achieves the storage of the rollers, restoring the device to its original height. By utilizing the mechanical linkage and pneumatic drive system constructed from the rotating plate, connecting rod, control plate, first piston, and second piston, it achieves convenient and precise control of the rollers' up and down movement, easily switching between mobile and fixed states of the device.

Description

Technical Field

[0001] This utility model relates to the field of AC / DC power supply technology, and in particular to a mobile AC / DC power supply system. Background Technology

[0002] With the continuous development of modern technology, AC / DC power supply systems play a crucial role in numerous fields. In industrial production, emergency rescue, and field operations, mobile AC / DC power supply systems are widely used due to their ability to provide a stable power supply in various locations. This type of power supply system can meet the power needs of various equipment in different environments, providing great convenience for production and work. For example, at emergency rescue sites, mobile AC / DC power supply systems can quickly power rescue equipment, ensuring the smooth progress of rescue work; in field scientific research, it can provide reliable power support for various instruments, ensuring the accurate collection of scientific data.

[0003] Currently, most mobile AC / DC power supply systems, in order to achieve mobility, often incorporate wheels at the bottom of the power cabinet or combine the power cabinet with a scooter. While this method solves the problem of moving the power cabinet to some extent, the addition of wheels or a scooter inevitably increases the overall height of the power cabinet. In actual operation, this increased height can negatively impact operator skills. For example, when connecting equipment or controlling the control panel, operators need to reach higher, which not only reduces comfort but may also affect accuracy and safety. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a mobile AC / DC power supply system, which solves the technical problem that the existing mobile AC / DC power supply systems achieve movement by setting rollers under the power cabinet or combining with a scooter, resulting in an increase in the overall height of the AC / DC power supply equipment, affecting the normal use by the staff, and making it inconvenient to control the up and down movement of the rollers.

[0005] Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: A mobile AC / DC power supply system, comprising: an AC / DC power supply unit body, with storage slots on both sides of the AC / DC power supply unit body, the bottom of which is connected to the bottom of the AC / DC power supply unit body; two mounting plates, which are slidably disposed within the storage slots, the length of which is adapted to the storage slots; and multiple rollers, which are respectively mounted below the two mounting plates. When not in use, the bottom of the rollers is higher than the bottom of the AC / DC power supply unit body. The mounting plates and storage slots are slidably connected via a dovetail groove structure. The dimensional accuracy of the dovetail groove is controlled within a very small tolerance range to ensure that the mounting plates can move smoothly without shaking or shifting during sliding. The mounting plates and rollers are fixedly connected by bolts made of high-strength alloy steel and equipped with anti-loosening nuts to ensure that the rollers will not loosen or fall off during use.

[0006] In a further embodiment, a compression chamber is formed within the main body of the AC / DC power supply device, and the compression chamber is used to fill the cavity within the main body of the AC / DC power supply device with gas; an air inlet is formed within the main body of the AC / DC power supply device, one end of the air inlet is connected to the compression chamber, and the other end extends through the outside of the main body of the AC / DC power supply device, and the air inlet is used to allow air to enter the compression chamber; an air outlet is formed within the main body of the AC / DC power supply device, one end of the air outlet is connected to the compression chamber, and the other end is connected to the cavity within the main body of the AC / DC power supply device, and the air outlet is used to guide the gas in the compression chamber... The air inlet is a cylindrical or rectangular cavity with a polished inner surface to reduce frictional resistance during gas flow and improve gas transmission efficiency. The inlet is a circular pipe with a protective mesh at one end that connects to the outside of the AC / DC power supply unit to prevent dust and debris from entering and affecting normal operation. The outlet is also a circular pipe with the same inner diameter as the inlet. Its orientation is optimized based on the location of the internal cavity to guide the gas from the compressed air chamber into the cavity via the shortest path, minimizing gas pressure loss.

[0007] In a further embodiment, a connecting air passage is provided within the main body of the AC / DC power supply device. The connecting air passage is used to connect the cavities within the main body of the AC / DC power supply device, and the connecting air passage is connected to the outlet air passage to introduce gas from the outlet air passage into the cavity. The connecting air passage may be a small circular channel distributed in a suitable position inside the main body of the AC / DC power supply device to ensure that the cavities can be effectively connected.

[0008] In a further embodiment, two blocking balls are provided, and the two blocking balls are respectively located at the conical openings in the air inlet and air outlet, and the blocking balls are located above the conical openings. The blocking balls are used to block the air inlet and air outlet. The blocking balls are spherical and made of materials with certain elasticity and sealing properties, such as rubber or silicone. Their surfaces are smooth to ensure that they can fit tightly inside the conical openings and achieve a good sealing effect.

[0009] In a further embodiment, a vent block is slidably disposed within a through slot opened in the main body of the AC / DC power supply device. The through slot is connected to a connecting air passage. The vent block is used to close and open the through slot. The vent block and the through slot are slidably connected by a slider guide rail structure. The slider guide rail has high fitting precision, ensuring that the vent block can accurately close and open the through slot during sliding without causing jamming. On one side of the vent block, a handle for manual operation can be provided. The handle is welded to the vent block. The shape and size of the handle are designed according to ergonomic principles, making it easy for the operator to push the vent block when venting is required.

[0010] In a further embodiment, a first piston is slidably disposed within the compression chamber. The first piston is used to draw air into and discharge air from the compression chamber. The first piston can be a circular piston with a diameter matching the inner diameter of the compression chamber. The piston surface can be machined with high precision to ensure a tight seal between it and the inner wall of the compression chamber. The piston material can be wear-resistant, high-temperature-resistant rubber or engineering plastic, and its edge is provided with a sealing ring made of highly elastic rubber material to further enhance the sealing effect between the piston and the chamber wall. The first piston and the connecting rod are rotatably connected by a pin. The pin is made of high-strength alloy steel, and its surface is hardened to improve wear resistance and hardness. The high precision of the fit between the pin, piston, and connecting rod ensures the reliability and flexibility of the connection, allowing the piston to move accurately up and down under the drive of the connecting rod, while also adapting to minor angular changes in the piston during movement, reducing friction and wear.

[0011] In a further embodiment, a rotating plate is rotatably disposed within the main body of the AC / DC power supply equipment; a connecting rod is rotatably connected at one end to the rotating plate and at the other end to the first piston; a control plate is stably connected to the rotating plate, and the control plate is used to control the rotation of the rotating plate; the rotating plate is used to control the up-and-down movement of the connecting rod, and the connecting rod is used to control the up-and-down movement of the first piston. The rotating plate is a circular metal plate with a diameter rationally designed according to the internal space of the equipment, possessing sufficient strength and rigidity to withstand the tension and pressure transmitted by the connecting rod and to rotate stably; the connecting rod is a slender metal rod made of high-strength alloy steel with a rust-proof surface treatment. The control plate is a rectangular metal plate, and its surface needs to be equipped with control rods and other structures for easy gripping and operation by the operator. The control plate and the rotating plate can be fixedly connected by bolts, and the connection parts are reinforced to ensure that the rotating plate can rotate synchronously with the control plate when it rotates, without any loosening or slippage.

[0012] In a further embodiment, a second piston is slidably disposed within the cavity. The bottom of the second piston penetrates the cavity and connects to the mounting plate. The second piston is used to drive the mounting plate to slide. The second piston is a circular piston with a structure and material similar to the first piston, but its diameter is adapted to the size of the cavity. Its surface is also provided with a sealing ring to ensure good sealing with the inner wall of the cavity. The second piston and the mounting plate can be connected by threads. The threads are coarse threads, ensuring a firm and reliable connection. Sealant is applied to the threaded connection to prevent gas leakage from the connection point. The fitting precision between the second piston and the inner wall of the cavity is strictly controlled to ensure that the piston can slide smoothly within the cavity while ensuring good sealing performance to prevent gas leakage from affecting the extension and retraction of the roller.

[0013] In a further embodiment, the connecting position of the connecting rod on the rotating plate is far from the center position of the rotating plate, and the moving stroke of the connecting rod is adapted to the sliding stroke of the first piston in the air chamber.

[0014] In a further embodiment, the diameter of the blocking ball is greater than the minimum diameter of the conical opening and greater than the maximum diameter of the conical opening, and the diameters of the air inlet and outlet are adapted to the maximum diameter of the conical opening.

[0015] Beneficial effects: 1. Through the cooperation of the storage slots, mounting plates and pneumatic transmission system on both sides of the AC / DC power supply equipment, the rollers are stored, so that the equipment can be restored to its original height. The storage slots are opened on both sides of the equipment body, and their bottoms are connected to the bottom of the body. Their size is adapted to the mounting plate to ensure that the mounting plate can slide smoothly.

[0016] 2. The mechanical linkage and pneumatic drive system, comprised of a rotating plate, connecting rod, control plate, first piston, and second piston, enables convenient and precise control of the roller's up-and-down movement, easily switching between mobile and stationary states. The rotating plate is circular, with a central bearing connected to a fixed shaft within the main body of the equipment, ensuring flexible and smooth rotation. One end of the connecting rod connects to the non-central position of the rotating plate via a spherical bearing. This connection point is meticulously designed to convert the rotation of the plate into a corresponding up-and-down movement for the connecting rod. The other end of the connecting rod is also connected to the first piston via a spherical bearing, ensuring precise and reliable motion transmission. The first piston slides precisely within the air chamber, drawing in or expelling air according to the connecting rod's movement. The air chamber is connected to the inlet and outlet channels. Air intake through the inlet and exhaust through the outlet channels push the second piston to slide within the cavity. The bottom of the second piston is threadedly connected to the mounting plate, thereby driving the mounting plate and roller to move up and down. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 for Figure 1 A schematic diagram of the main cross-section.

[0020] Figure 3 This is a schematic diagram of the roller structure.

[0021] Figure 4 for Figure 1 A schematic diagram of the side section structure.

[0022] Figure 5 for Figure 1 A top-down sectional view of the structure.

[0023] Figure 6 for Figure 2 A schematic diagram of the structure at point A.

[0024] Figure 7 for Figure 3 A schematic diagram of the structure at point B.

[0025] Figure 8 for Figure 4 A schematic diagram of the structure at point C.

[0026] The reference numerals in the figure are as follows: 1. AC / DC power supply equipment body; 101. Compressed air chamber; 102. Air inlet; 103. Air outlet; 2. Roller; 3. Control panel; 4. Rotating plate; 5. Connecting rod; 6. First piston; 7. Second piston; 8. Mounting plate; 9. Blocking ball; 10. Connecting air passage; 11. Venting block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in this utility model are described clearly and completely. Obviously, the described embodiments are only some, not all, of the embodiments in this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this utility model without creative effort are within the scope of protection of this utility model.

[0028] This application provides a mobile AC / DC power supply system that solves the technical problem that existing mobile AC / DC power supply systems, which rely on wheels or a scooter for mobility, increase the overall height of the AC / DC power supply unit, hindering normal use and making it difficult to control the vertical movement of the wheels. In practical use, the system allows the wheels to retract into the main body of the AC / DC power supply unit, restoring the unit to its original height and facilitating vertical control of the wheels.

[0029] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0030] Reference Figure 1-8 A mobile AC / DC power supply system includes: an AC / DC power supply device body 1, with storage slots on both sides of the AC / DC power supply device body 1, the bottom of the storage slots being connected to the bottom of the AC / DC power supply device body 1; two mounting plates 8, which are slidably disposed in the storage slots, the length of the mounting plates 8 being adapted to the storage slots; and multiple rollers 2, which are respectively installed below the two mounting plates 8, the bottom of the rollers 2 being higher than the bottom of the AC / DC power supply device body 1 when not in use.

[0031] By opening storage slots on both sides of the AC / DC power supply device body 1 that extend through the bottom, and installing mounting plates 8 that can slide in the storage slots and rollers 2 installed below the mounting plates 8, the rollers 2 have storage space when not in use and can be hidden on both sides of the device body, avoiding increasing the overall height of the device, maintaining the original compact shape of the device, facilitating placement and operation when no moving is required, and quickly activating the rollers 2 when moving is required.

[0032] A compression chamber 101 is located inside the AC / DC power supply unit 1. The compression chamber 101 is used to fill the cavity inside the AC / DC power supply unit 1 with gas. An air inlet 102 is located inside the AC / DC power supply unit 1. One end of the air inlet 102 is connected to the compression chamber 101, and the other end extends through the outside of the AC / DC power supply unit 1. The air inlet 102 is used to allow air to enter the compression chamber 101. An air outlet 103 is located inside the AC / DC power supply unit 1. One end of the air outlet 103 is connected to the compression chamber 101, and the other end is connected to the cavity inside the AC / DC power supply unit 1. The air outlet 103 is used to guide the gas in the compression chamber 101 into the cavity.

[0033] The arrangement of the compression chamber 101, the inlet duct 102, and the outlet duct 103 establishes a gas transmission path. The compression chamber 101 acts as a "transfer station" for gas, storing and regulating it. The inlet duct 102 is responsible for introducing gas from outside the equipment, providing a way to replenish the gas in the compression chamber 101. The outlet duct 103 precisely guides the gas in the compression chamber 101 to the cavity inside the main body of the equipment, laying the foundation for subsequently using gas pressure to drive the movement of related components and ensuring the stable operation of the internal pneumatic drive system.

[0034] A connecting air passage 10 is provided inside the AC / DC power supply equipment body 1. The connecting air passage 10 is used to connect the cavities provided inside the AC / DC power supply equipment body 1. The connecting air passage 10 is connected to the air outlet passage 103 to introduce the gas in the air outlet passage 103 into the cavity.

[0035] The connecting air passage 10 connects the various cavities inside the main body of the equipment to each other and is connected to the air outlet 103, ensuring that the gas output from the air outlet 103 can be evenly distributed to each cavity, so that the pressure inside the cavity is balanced, avoiding uneven force on related components and uncoordinated movement due to uneven local air pressure, and ensuring the smooth and synchronous operation of the air pressure driven mechanical structure.

[0036] Two blocking balls 9 are provided, and the two blocking balls 9 are respectively located at the conical openings in the air intake duct 102 and the air outlet duct 103, and the blocking balls 9 are located above the conical openings. The blocking balls 9 are used to block the air intake duct 102 and the air outlet duct 103.

[0037] Two blocking balls 9 are respectively placed above the conical openings of the air inlet 102 and the air outlet 103. By utilizing the matching relationship between the diameter of the blocking ball 9 and the size of the conical opening, the blocking ball 9 can tightly block the conical opening when gas flow is not required, preventing gas leakage, ensuring the airtightness of the air pressure system, maintaining the stability of the air pressure in the system, and ensuring the reliability of the equipment during static and dynamic switching processes.

[0038] The vent block 11 is slidably disposed in a through slot opened inside the AC / DC power supply equipment body 1. The through slot is connected to the connecting air passage 10. The vent block 11 is used to close and open the through slot.

[0039] The vent block 11 slides within a through slot that connects to the air passage 10, and the operator can manipulate the vent block 11 as needed. When it is necessary to release gas from the cavity, the vent block 11 is pushed to open the through slot, allowing the gas to escape.

[0040] The first piston 6 is slidably disposed in the air compression chamber 101. The first piston 6 is used to draw in and discharge air into the air compression chamber 101.

[0041] The first piston 6 slides within the air compression chamber 101, and through its reciprocating motion, it achieves the intake and exhaust of air within the air compression chamber 101.

[0042] A rotating plate 4 is rotatably mounted inside the main body 1 of the AC / DC power supply equipment; a connecting rod 5 is rotatably connected at one end to the rotating plate 4 and at the other end to the first piston 6; a control plate 3 is stably connected to the rotating plate 4, and the control plate 3 is used to control the rotation of the rotating plate 4; the rotating plate 4 is used to control the connecting rod 5 to move up and down, and the connecting rod 5 is used to control the first piston 6 to move up and down.

[0043] The rotating plate 4, connecting rod 5, and control plate 3 constitute a mechanical transmission system. When the operator rotates the control plate 3, the rotating plate 4 will rotate. Since the rotating plate 4 is rotatably connected to one end of the connecting rod 5 and the connection position is far from the center, the change in the lever arm generated by the rotation is converted into the up and down movement of the connecting rod 5. In turn, the connecting rod 5 drives the first piston 6 to slide up and down in the air chamber 101, which accurately converts the operator's manual operation into the power change in the air pressure system, and realizes convenient control of the extension and retraction of the equipment roller 2.

[0044] The second piston 7 is slidably disposed in the cavity. The bottom of the second piston 7 passes through the cavity and is connected to the mounting plate 8. The second piston 7 is used to drive the mounting plate 8 to slide.

[0045] The second piston 7 is located inside the cavity and its bottom is connected to the mounting plate 8. When the gas pressure inside the cavity changes, the second piston 7 will slide under the pressure. Due to its rigid connection with the mounting plate 8, it will drive the mounting plate 8 to slide synchronously in the storage groove, and finally realize the up and down movement of the roller 2 under the mounting plate 8, thus completing the switch of the equipment from a fixed to a moving state and enabling the equipment to move effectively.

[0046] The connecting rod 5 is located away from the center of the rotating plate 4, and the travel of the connecting rod 5 is adapted to the sliding travel of the first piston 6 in the air chamber 101.

[0047] The connection design of the connecting rod 5 on the rotating plate 4, which is located away from the center, combined with the matching relationship between the travel of the connecting rod 5 and the sliding travel of the first piston 6 in the air chamber 101, ensures that the rotation angle of the rotating plate 4 can accurately correspond to the sliding distance required by the first piston 6. This allows the operator's rotation operation of the control plate 3 to be accurately and efficiently converted into the movement of the first piston 6, realizing fine control of the air pressure system and improving the accuracy of equipment operation.

[0048] The diameter of the blocking ball 9 is greater than the minimum diameter of the conical opening and greater than the maximum diameter of the conical opening. The diameters of the air inlet 102 and the air outlet 103 are adapted to the maximum diameter of the conical opening.

[0049] The diameter of the plugging ball 9 is larger than the minimum and maximum diameters of the conical opening, and the diameters of the inlet duct 102 and outlet duct 103 are matched with the maximum diameter of the conical opening. This size design ensures that the plugging ball 9 can reliably seal the conical opening when stationary to prevent gas leakage. On the other hand, when gas flow is required, the reasonable duct diameter can ensure smooth gas passage, reduce airflow resistance, and improve the response speed and operating efficiency of the pneumatic system.

[0050] During use, when the AC / DC power supply unit 1 needs to be moved, the operator manually rotates the control panel 3. The control panel 3 drives the rotating plate 4, which is stably connected to it, to rotate. Since one end of the connecting rod 5 is rotatably connected to the rotating plate 4 away from the center, the rotation of the rotating plate 4 causes the connecting rod 5 to move up and down. The other end of the connecting rod 5 is rotatably connected to the first piston 6, which is slidably disposed in the air compression chamber 101, thereby driving the first piston 6 to slide downward in the air compression chamber 101. At this time, outside air is drawn into the air compression chamber 101 through the air intake duct 102. One end of the air intake duct 102 extends through the outside of the AC / DC power supply unit 1, and the other end is connected to the air compression chamber 101. The blocking ball 9 in the air intake duct 102 is pushed upward by the airflow, allowing air to enter smoothly. As the first piston 6 moves upward, the blocking ball 9 in the air intake duct 102 falls back to block the conical opening under the action of gas pressure, while the gas in the air compression chamber 101 is pushed out. The blocking ball 9 in the air passage 103 moves upward, one end of the air passage 103 is connected to the compressed air chamber 101, and the other end is connected to the cavity in the main body of the equipment. Gas is introduced into the cavity through the air passage 103 and the connecting air passage 10 connected to it. The connecting air passage 10 is used for communication between cavities. The second piston 7 in the cavity slides downward under the pressure of air. The bottom of the second piston 7 passes through the cavity and is connected to the mounting plate 8. The mounting plate 8 is slidably set in the storage slots opened on both sides of the main body of the equipment, and its length is adapted to the storage slots. The roller 2 under the mounting plate 8 moves downward until the bottom of the roller 2 protrudes from the bottom of the AC / DC power supply equipment body 1, realizing the movement of the equipment. When the equipment moves to the designated position and does not need to move, the vent block 11 can be pushed. The vent block 11 is slidably set in the through slot connected to the connecting air passage 10, opening the through slot, allowing the gas in the cavity to be discharged, and all components return to their initial state. The roller 2 retracts into the storage slot.

[0051] The figures shown in the accompanying drawings are illustrative and are intended only to more intuitively demonstrate the key structure and connection relationships of a mobile AC / DC power supply system of this utility model. In practical applications, the appearance and size of the device can be adjusted and optimized according to specific needs.

[0052] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A mobile AC / DC power supply system, characterized in that, include: AC / DC power supply equipment body (1), with storage slots on both sides of the AC / DC power supply equipment body (1), and the bottom of the storage slots communicating with the bottom of the AC / DC power supply equipment body (1); There are two mounting plates (8), and the two mounting plates (8) are slidably disposed in the storage slot. The length of the mounting plate (8) is adapted to the storage slot. There are multiple rollers (2), and the multiple rollers (2) are respectively installed below the two mounting plates (8). When the rollers (2) are not in use, the bottom of the rollers (2) is higher than the bottom of the AC / DC power supply equipment body (1). Also includes: A compressed air chamber (101) is provided inside the AC / DC power supply equipment body (1). The compressed air chamber (101) is used to fill the cavity provided inside the AC / DC power supply equipment body (1) with gas. An air intake duct (102) is provided inside the AC / DC power supply equipment body (1). One end of the air intake duct (102) is connected to the air compressor chamber (101), and the other end extends through the outside of the AC / DC power supply equipment body (1). The air intake duct (102) is used for air intake of the air compressor chamber (101). An air outlet (103) is provided inside the AC / DC power supply equipment body (1). One end of the air outlet (103) is connected to the air compressor chamber (101), and the other end is connected to the cavity inside the AC / DC power supply equipment body (1). The air outlet (103) is used to introduce the gas in the air compressor chamber (101) into the cavity. Also includes: A connecting air passage (10) is provided inside the AC / DC power supply equipment body (1). The connecting air passage (10) is used to connect the cavities provided inside the AC / DC power supply equipment body (1). The connecting air passage (10) is connected to the air outlet passage (103) to introduce the gas in the air outlet passage (103) into the cavity. Also includes: The first piston (6) is slidably disposed in the air chamber (101), and the first piston (6) is used to draw in and discharge air into the air chamber (101); Also includes: The rotating plate (4) is rotatably installed inside the AC / DC power supply equipment body (1); The connecting rod (5) is rotatably connected at one end to the rotating plate (4) and at the other end to the first piston (6); The control plate (3) is stably connected to the rotating plate (4), and the control plate (3) is used to control the rotation of the rotating plate (4); The rotating plate (4) is used to control the linkage (5) to move up and down, and the linkage (5) is used to control the first piston (6) to move up and down; Also includes: The second piston (7) is slidably disposed in the cavity. The bottom of the second piston (7) passes through the cavity and is connected to the mounting plate (8). The second piston (7) is used to drive the mounting plate (8) to slide.

2. The mobile AC / DC power supply system according to claim 1, characterized in that, Also includes: Two blocking balls (9) are provided, and the two blocking balls (9) are respectively located at the conical openings in the air intake (102) and the air outlet (103), and the blocking balls (9) are located above the conical openings. The blocking balls (9) are used to block the air intake (102) and the air outlet (103).

3. A mobile AC / DC power supply system according to claim 1, characterized in that, Also includes: The vent block (11) is slidably disposed in the through slot opened in the main body (1) of the AC / DC power supply equipment. The through slot is connected to the connecting air passage (10). The vent block (11) is used to close and open the through slot.

4. A mobile AC / DC power supply system according to claim 1, characterized in that: The connection position of the connecting rod (5) on the rotating plate (4) is far from the center position of the rotating plate (4), and the travel of the connecting rod (5) is adapted to the sliding travel of the first piston (6) in the air chamber (101).

5. A mobile AC / DC power supply system according to claim 2, characterized in that: The diameter of the blocking ball (9) is greater than the minimum diameter of the conical opening and greater than the maximum diameter of the conical opening. The diameters of the air inlet (102) and the air outlet (103) are adapted to the maximum diameter of the conical opening.

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