An alternating current charging pile with a moving function and a method thereof

Abstract

The application discloses an alternating current charging pile with a moving function and a method thereof, relates to the technical field of charging piles, and provides an alternating current charging pile with a moving function, which comprises equipment.

Description

Technical Field

[0001] This invention belongs to the field of charging piles, specifically relating to an AC charging pile with mobile functionality. Background Technology

[0002] With the popularization of new energy vehicles, AC charging piles have become an essential infrastructure for daily vehicle charging. Some charging piles are designed to be mobile so that they can be flexibly allocated and used between parking spaces.

[0003] Portable charging stations are quite heavy, and arbitrarily releasing the restraints on them can cause them to move. If they move too fast, they become difficult to control. If a user pushes the station with one hand or moves it without a firm grip on the handle, the station may slide or tip over out of control, causing damage to the equipment or injury to people. It is also difficult to restrain the station in time when it is released. Summary of the Invention

[0004] Therefore, it is necessary to provide a mobile AC charging station to address the shortcomings of existing technologies and solve the charging station problem.

[0005] To solve the above problems, this application adopts the following technical solution: One objective of this application is to provide a mobile AC charging station, comprising: a device, wherein a drive shaft is rotatably connected to the inner wall of the device, a rear wheel is fixedly connected to the surface of the drive shaft, and grooves are equidistantly formed on the circumferential surface of the drive shaft; a front wheel frame is rotatably connected to the inner wall of the device, a rotating shaft is rotatably connected to the inner wall of the front wheel frame, a front wheel is fixedly connected to the circumferential surface of the rotating shaft, a notched disc is fixedly connected to the circumferential surface of the rotating shaft; a handle is fixedly connected to the inner wall of the device, a first pressing block is slidably connected to the inner wall of the handle, and a lower pressing rod is fixedly connected to the surface of the first pressing block; the lower pressing rod is slidably connected to the inner wall of the handle. An intercepting block is dynamically connected, and the surface of the intercepting block is provided with two inclined surfaces, one above the other. A fixed inclined block is fixedly connected to the inner wall of the equipment. A crossbar is slidably connected to the inner wall of the equipment. A lower protrusion is fixedly connected to the bottom of the crossbar. A linkage rod is slidably connected to the inner wall of the front wheel frame. The top of the linkage rod is rotatably connected to the bottom of the crossbar. One end of a first rotating rod is rotatably connected inside the linkage rod. A pulling rod is rotatably connected to the other end of the first rotating rod. One end of a connecting line is fixedly connected to the surface of the pulling rod. A first rotating plate is rotatably connected to the inner wall of the front wheel frame. The other end of the connecting line is fixedly connected to the surface of the first rotating plate.

[0006] In some embodiments, a movable circular plate is slidably connected to the inner wall of the device, a groove is provided on the surface of the front wheel frame, a guide protrusion is fixedly connected to the bottom of the movable circular plate, and an outer cover plate is fixedly connected to the top of the movable circular plate.

[0007] In some embodiments, a first spring is provided between the surface of the crossbar and the inner wall of the equipment; a first torsion spring is provided between the inner wall of the first rotating plate and the inner wall of the front wheel frame; a second spring is provided between the top of the movable circular plate and the inner wall of the equipment; the bottom of the outer cover plate is located above the surface of the crossbar, and the rise of the crossbar can lift the outer cover plate; an eighth spring is provided between the surface of the intercepting block and the inner wall of the pressing rod; and a seventh spring is provided between the top of the pressing rod and the inner wall of the equipment. The seventh spring allows the pressing block to spring back after being pressed by personnel. The first pressing block, the pressing rod, the intercepting block, and the fixed inclined block are symmetrically arranged with the equipment as the center line. The symmetrical arrangement is to require both hands to press down simultaneously to move the equipment.

[0008] In some embodiments, an opening plate is rotatably connected to the inner wall of the device, a wire reel is fixedly connected to the circumferential surface of the opening plate, one end of an electric gun wire is fixedly connected to the circumferential surface of the wire reel, the other end of the electric gun wire is fixedly connected to an electric gun, a second extrusion block is slidably connected to the inner wall of the electric gun, a bending rod is rotatably connected to the inner wall of the electric gun, upper and lower inclined blocks are slidably connected to the inner wall of the electric gun, an inclined push block is slidably connected to the inner wall of the electric gun, an inclined long rod is rotatably connected to the surface of the inclined push block, and a trapezoidal block is slidably connected to the inner wall of the device, the surface of the trapezoidal block being provided with an inclined surface.

[0009] In some embodiments, a fixing block is fixedly connected to the inner wall of the device, a lower support rod is slidably connected to the inner wall of the fixing block, a semi-circular protrusion is fixedly connected to the top of the lower support rod, and a semi-circular groove is formed on the inner wall of the electric gun.

[0010] In some embodiments, the surface of the electric gun is provided with a limiting groove, a second torsion spring is provided between the inner wall of the opening plate and the inner wall of the equipment, the second torsion spring can retract the rotating opening plate back to the correct position, a third spring is provided between the surface of the inclined push block and the inner wall of the electric gun, a fourth spring is provided between the top of the trapezoidal block and the inner wall of the equipment, the bottom of the trapezoidal block is located in the limiting groove of the electric gun, and the position of the trapezoidal block can lock the electric gun inside the equipment, a fifth spring is provided between the surface of the fixing block and the bottom of the semi-circular protrusion, and the bottom of the lower support rod is located below the bottom of the crossbar.

[0011] In some embodiments, an upper plate is slidably connected to the inner wall of the device, an upper support rod is slidably connected to the inner wall of the device, the top of the upper support rod is located above the surface of the upper plate, one end of a second rotating rod is rotatably connected to the inner wall of the upper support rod, a second rotating plate is rotatably connected to the inner wall of the device, a left extrusion block is slidably connected to the inner wall of the device, the top of the left extrusion block is rotatably connected to the other end of the second rotating rod, a right extrusion block is slidably connected to the inner wall of the device, and a third rotating plate is rotatably connected to the inner wall of the device, one end of the third rotating plate is rotatably connected to the surface of the left extrusion block, and the other end of the third rotating plate is rotatably connected to the surface of the right extrusion block. The left extrusion block has a sloping surface on its surface. An L-shaped rod is slidably connected to the inner wall of the equipment. A No. 6 spring is installed between the surface of the L-shaped rod and the inner wall of the equipment. A No. 3 rotating rod is rotatably connected to the surface of the L-shaped rod. A No. 3 torsion spring is installed between the inner wall of the No. 3 rotating rod and the surface of the equipment. A small blocking block is installed on the surface of the L-shaped rod. A protruding circular plate is rotatably connected to the inner wall of the equipment. A rotating protrusion is rotatably connected to the surface of the protruding circular plate. A moving block is slidably connected to the inner wall of the equipment. The bottom of the moving block has an arc surface, and the top of the moving block has a sloping surface. A No. 5 torsion spring is installed between the inner wall of the protruding circular plate and the inner wall of the equipment.

[0012] In some embodiments, an elongated block is slidably connected to the surface of the second rotating plate, a rack plate is slidably connected to the inner wall of the second rotating plate, a fourth rotating rod is rotatably connected inside the second rotating plate, one end of the fourth rotating rod is rotatably connected to the surface of the elongated block, the other end of the fourth rotating rod is rotatably connected to the surface of the rack plate, a fourth torsion spring is provided between the inner wall of the fourth rotating rod and the inner wall of the second rotating plate, a gear is rotatably connected to the inner wall of the second rotating plate, the rack plate meshes with the gear, and the fourth rotating plate is fixedly connected to the top of the gear.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention features symmetrically arranged compression blocks on both sides of the charging pile's handle. Users need to press both compression blocks on either side to move the charging pile. Pressing down a compression block causes a downward pressure rod to move upwards, pulling an intercepting block upwards. The upper inclined surface of the intercepting block contacts a fixed inclined block and is pushed inwards, releasing its obstruction of the crossbar. The charging pile can only release the front and rear wheel locks when both compression blocks on both sides are pressed simultaneously. When operating with one hand, the intercepting block on the other side still blocks the crossbar, keeping the front and rear wheels locked and preventing the charging pile from being pushed. This prevents operators from losing control while pushing the cart with one hand, ensuring equipment and personnel safety. When the charging station is in motion, it may tilt or slide due to a shift in the center of gravity, making it difficult for personnel to control and potentially causing collisions with vehicles or people. After both hands are pressed to unlock, if one or both hands leave the No. 1 pressing block, the No. 8 spring on that side will push the lower pressing rod downwards. The lower slope of the intercepting block will then push the crossbar downwards again. As the crossbar moves downwards, the guide protrusion will re-engage with the drive shaft groove. Through the cooperation between the guide protrusion and the drive shaft groove, the front wheel will remain vertical and will not be affected by the front wheel deflection during the next push. After the front wheel returns to center, the charging station will be more stable when parked in the locked state. If the front wheel does not return to center, the front wheel will be out of direction during the next push, making it difficult to push and prone to veering off course.

[0014] 2. This invention features a second pressing block slidably connected to the inner wall of the electric gun. When the second pressing block is pressed down, it pushes a bending rod to rotate. The bending rod pushes the upper and lower inclined blocks downwards. The lower inclined surface of the upper and lower inclined blocks pushes a slanted push block to move. The slanted push block pushes a trapezoidal block upwards via a long inclined rod. The trapezoidal block exits from the limiting groove of the electric gun. Without pressing the second pressing block, the trapezoidal block remains stuck in the limiting groove, preventing the electric gun from being pulled out. Even during movement or vibration, the electric gun will not fall out of the device. Without a locking mechanism, the charging pile... During movement, vibrations may cause the electric gun to fall out of the device and break. A lower support rod is fixedly connected to the bottom of the crossbar, and a semi-circular protrusion is fixedly connected to the top of the lower support rod. A No. 5 spring is installed between the semi-circular protrusion and the fixed block. When the charging pile is not completely stopped or the wheels are not locked, the crossbar is in the upper position. The lower support rod drives the semi-circular protrusion upward, and the semi-circular protrusion is locked into the semi-circular groove of the electric gun, so the electric gun cannot be pulled out. This avoids the user forcibly pulling out the gun when the charging pile is not completely stopped, which could cause the device to shift or tip over.

[0015] 3. In this invention, after the electric gun is pulled out, the second extrusion block drives the upper plate upward through a series of transmissions. The upper plate, through a linkage mechanism including the upper connecting rod, the second rotating rod, the second rotating plate, the left extrusion block, and the third rotating plate, positions the right extrusion block to the left of the second rotating plate. At this time, the second rotating plate can only rotate counterclockwise, not clockwise. The reel can only extend the electric gun wire and cannot retract it. After the electric gun is pulled out, the reel is locked in the extension direction only. When the user pulls out the cable, the cable will not retract automatically after being pulled out. The user can freely adjust the cable length without continuously pulling the cable. After the electric gun is inserted back in, the reel is locked in the retraction direction only, and the cable is automatically retracted by the reel. Furthermore, the electric gun will not operate until the user removes it. The cable cannot be pulled out. When a person forcibly pulls the electric gun cable, the notch in the open plate presses against the surface of the second rotating plate. Under strong pulling, the notch in the open plate presses the oblong block to move towards the inner wall of the second rotating plate. The movement of the oblong block drives the fourth rotating rod to rotate. The fourth rotating rod pulls the rack plate to move towards the inner wall of the second rotating plate. The rack plate drives the gear to rotate, and the gear drives the fourth rotating plate to rotate. When the user or vehicle pulls the cable forcefully, the cable wheel lock direction automatically switches, and the cable can continue to be pulled out without being subjected to excessive pulling force due to the cable wheel locking. The internal conductors and connectors of the cable are protected and will not break. Without this setting, forcefully pulling the cable will cause the internal conductors of the cable to break, the connectors to fall off, or even damage the cable wheel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of the device in one embodiment of the present invention; Figure 3 This is a schematic diagram of the position structure of the lower protrusion in one embodiment of the present invention; Figure 4 This is a schematic diagram of the position structure of the thread reel in one embodiment of the present invention; Figure 5 This is a schematic diagram of the position structure of the front wheel in one embodiment of the present invention; Figure 6 This is a schematic diagram of the positional structure of the notched disk in one embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 A magnified structural diagram of part A in the middle; Figure 8 This is a schematic diagram of the positional structure of the L-shaped rod in one embodiment of the present invention; Figure 9 This is a cross-sectional structural diagram of an electric gun according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the handle's position structure in one embodiment of the present invention; Figure 11This is an embodiment of the present invention. Figure 10 A magnified structural diagram of part B in the middle section; Figure 12 This is a cross-sectional structural diagram of the second rotating plate in one embodiment of the present invention.

[0017] Explanation of key figure labels: 1. Equipment; 2. Electric gun; 201. Handle; 202. Rear wheel; 203. Front wheel; 204. Electric gun wire; 205. Wire reel; 206. Opening plate; 3. First extrusion block; 301. Lower pressure rod; 302. Intercepting block; 303. Fixed inclined block; 304. Drive shaft; 305. Lower protrusion; 306. Crossbar; 307. Notched disc; 308. Rotating shaft; 309. Front wheel frame; 310. First rotating plate; 311. Connecting wire; 312. Pull rod; 313. First rotating rod; 314. Linkage rod; 315. Outer plate; 316. Guide protrusion; 317. Moving circular plate; 4. Second extrusion block; 401. Bending rod; 402. Upper and lower inclined blocks; 403. Inclined push block; 404. Inclined long rod; 405. Trapezoidal block; 406. Semicircular protrusion; 407. Lower support rod; 408. Fixed block; 5. Upper plate; 501. L-shaped rod; 502. Upper support rod; 503. Rotating plate No. 2; 504. Rotating rod No. 2; 505. Left extrusion block; 506. Rotating plate No. 3; 507. Right extrusion block; 508. Moving block; 509. Protruding circular plate; 510. Rotating protrusion; 511. Rotating rod No. 3; 512. Long oval block; 513. Rack plate; 514. Gear; 515. Rotating plate No. 4; 516. Rotating rod No. 4. Detailed Implementation

[0018] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0019] like Figure 1 - Figure 12As shown, one embodiment of the present invention is: an AC charging pile with mobile function, comprising: a device 1, a drive shaft 304 rotatably connected to the inner wall of the device 1, a rear wheel 202 fixedly connected to the surface of the drive shaft 304, grooves evenly spaced on the circumferential surface of the drive shaft 304, a front wheel frame 309 rotatably connected to the inner wall of the device 1, a rotating shaft 308 rotatably connected to the inner wall of the front wheel frame 309, a front wheel 203 fixedly connected to the circumferential surface of the rotating shaft 308, a notched disc 307 fixedly connected to the circumferential surface of the rotating shaft 308, a handle 201 fixedly connected to the inner wall of the device 1, a first pressing block 3 slidably connected to the inner wall of the handle 201, a lower pressing rod 301 fixedly connected to the surface of the first pressing block 3, an intercepting block 302 slidably connected to the inner wall of the lower pressing rod 301, the surface of the intercepting block 302 being provided with upper and lower inclined surfaces, and a fixing inclined block 303 fixedly connected to the inner wall of the device 1. A crossbar 306 is slidably connected to the inner wall of device 1. A lower protrusion 305 is fixedly connected to the bottom of the crossbar 306. A linkage rod 314 is slidably connected to the inner wall of the front wheel frame 309. The top of the linkage rod 314 is rotatably connected to the bottom of the crossbar 306. One end of a first rotating rod 313 is rotatably connected inside the linkage rod 314. The other end of the first rotating rod 313 is rotatably connected to a pull rod 312. One end of a connecting line 311 is fixedly connected to the surface of the pull rod 312. A first rotating plate 310 is rotatably connected to the inner wall of the front wheel frame 309. The other end of the connecting line 311 is fixedly connected to the surface of the first rotating plate 310. When the crossbar 306 is released, the charging pile can only release the locking of the front and rear wheels when both hands press the first pressing blocks 3 on both sides at the same time. When operating with one hand, the intercepting block 302 on the other side still blocks the crossbar 306, and the front and rear wheels remain locked, so the charging pile cannot be pushed.

[0020] A movable circular plate 317 is slidably connected to the inner wall of device 1. A groove is provided on the surface of the front wheel frame 309. A guide protrusion 316 is fixedly connected to the bottom of the movable circular plate 317. An outer cover plate 315 is fixedly connected to the top of the movable circular plate 317. When the crossbar 306 moves downward, the guide protrusion 316 re-engages into the groove of the drive shaft 304. Through the cooperation between the guide protrusion 316 and the groove of the drive shaft 304, the front wheel 203 will remain vertical and will not be affected by the deflection of the front wheel 203.

[0021] A first spring is installed between the surface of the crossbar 306 and the inner wall of the equipment 1. A first torsion spring is installed between the inner wall of the first rotating plate 310 and the inner wall of the front wheel frame 309. A second spring is installed between the top of the moving circular plate 317 and the inner wall of the equipment 1. The bottom of the outer cover plate 315 is located above the surface of the crossbar 306. The rise of the crossbar 306 can lift the outer cover plate 315. An eighth spring is installed between the surface of the intercepting block 302 and the inner wall of the lower pressure rod 301. A seventh spring is installed between the top of the lower pressure rod 301 and the inner wall of the equipment 1. The seventh spring allows the person to press the squeezing block 3 and be bounced back. The first squeezing block 3, the lower pressure rod 301, the intercepting block 302 and the fixed inclined block 303 are symmetrically arranged with the equipment 1 as the center line. The symmetrical arrangement is so that two hands need to press down at the same time to move the equipment 1.

[0022] A method for using a mobile AC charging station includes the following steps: Step 1: When personnel push equipment 1, they need to press down on the No. 1 extrusion block 3 with both hands. The No. 1 extrusion block 3 drives the lower pressure rod 301 to move upward. During the movement of the lower pressure rod 301, it will compress the No. 8 spring. The upward movement of the lower pressure rod 301 will pull the intercepting block 302 upward. The intercepting block 302 is constantly pushed by the No. 7 spring. After the inclined surface of the intercepting block 302 contacts the inclined surface of the fixed inclined block 303, the intercepting block 302 will be pushed to move towards the inner wall of the lower pressure rod 301. During the movement of the intercepting block 302, it will compress the No. 8 spring. As the two sides of the intercepting block 302 are pushed apart by the inclined surfaces of the fixed inclined blocks 303, the No. 1 spring will pull the horizontal bar 306 upward. The upward movement of the horizontal bar 306 will bring... When the lower protrusion 305 moves away from the groove of the drive shaft 304, the crossbar 306 pulls the linkage rod 314 upward. The linkage rod 314 pulls the first rotating rod 313 upward. The movement of the first rotating rod 313 causes the pulling rod 312 to slide along the inner wall of the front wheel frame 309. The pulling rod 312 pulls the connecting line 311. The connecting line 311 causes the first rotating plate 310 to move upward. The first rotating plate 310 will compress the first torsion spring as it moves upward. The rise of the first rotating plate 310 will move away from the notch of the notched disc 307. At this time, due to the movement of the first rotating plate 310 away from the lower protrusion 305, the rear wheel 202 and the front wheel 203 are both released from their restraints, and the personnel can start pushing the equipment 1. Step Two: After the operator releases the No. 1 squeezing block 3, the No. 8 spring will push the lower pressure rod 301 downwards. The downward movement of the lower pressure rod 301 will cause the No. 1 squeezing block 3 and the intercepting block 302 to move downwards. The lower slope of the intercepting block 302 will push the slope of the crossbar 306 again, causing the crossbar 306 to move downwards. The downward movement of the crossbar 306 will pull the No. 1 spring, which will be transmitted to the lower protrusion 305 and the No. 1 rotating plate 310 to move downwards. Therefore, it will re-lock the rear wheel 202 and the front wheel 203, preventing the device 1 from being pushed. If the operator only presses one No. 1 squeezing block 3 or does not press one, and presses one, one of the No. 1 squeezing blocks 3 will... Lifting the lower pressure rod 301 causes one of the blocking blocks 302 to be pushed open by the fixed inclined block 303. Since the other blocking block 302 does not move, the top of the crossbar 306 is restricted by the position of the other blocking block 302. The pull of the first spring cannot push out the blocking block 302, so the crossbar 306 cannot move. Since the crossbar 306 does not move, the lower protrusion 305 is still stuck in the groove of the drive shaft 304, and the first rotating plate 310 is still located in the notch of the notched disc 307. Thus, by pressing one or not pressing one, the rear wheel 202 and the front wheel 203 are still restricted, and the device 1 cannot be pushed. Step 3: Through the set movable circular plate 317, the second spring will continuously push the movable circular plate 317 downward. When the crossbar 306 is lifted, the outer cover plate 315 will be lifted. The outer cover plate 315 lifts the movable circular plate 317 upward, and the movable circular plate 317 compresses the second spring upward. The movable circular plate 317 lifts the guide protrusion 316 away from the groove of the front wheel frame 309. In this way, the front wheel frame 309 will not be affected by the guide protrusion 316 during rotation. After the personnel release the first pressing block 3 with both hands, the outer cover plate 315 will descend along with the second spring as the crossbar 306 is pushed downward. Step 4: Spring No. 2 will push the moving circular plate 317 downward. The downward movement of the moving circular plate 317 will drive the guide protrusion 316 downward. The guide protrusion 316 will contact the groove of the front wheel frame 309. Subsequently, the guide protrusion 316 will press against the groove of the front wheel frame 309. During the continuous application of pressure, the guide protrusion 316 will gradually push the front wheel frame 309, so that the guide protrusion 316 will eventually fall at the bottom of the groove of the front wheel frame 309. This will drive the front wheel frame 309 to keep the wheel in a vertical state.

[0023] In this embodiment, during operation: when personnel push device 1, they need to press down on the first pressing block 3 with both hands. The first pressing block 3 drives the lower pressing rod 301 to move upward. During the movement of the lower pressing rod 301, it will compress the eighth spring. The upward movement of the lower pressing rod 301 will pull the intercepting block 302 upward. The intercepting block 302 is constantly pushed by the seventh spring. After the inclined surface of the intercepting block 302 contacts the inclined surface of the fixed inclined block 303, the intercepting block 302 will be pushed to move towards the inner wall of the lower pressing rod 301. During the movement of the intercepting block 302, it will compress the eighth spring. As the two sides of the intercepting block 302 are pushed apart by the inclined surfaces of the fixed inclined blocks 303, the first spring will pull the horizontal bar 306 upward. The upward movement of rod 306 will cause the lower protrusion 305 to move away from the groove of drive shaft 304. The crossbar 306 will pull linkage rod 314 upward, which in turn pulls the first rotating rod 313 upward. The movement of the first rotating rod 313 will cause the pulling rod 312 to slide along the inner wall of the front wheel frame 309. The pulling rod 312 will pull the connecting line 311, which will cause the first rotating plate 310 to move upward. The upward movement of the first rotating plate 310 will compress the first torsion spring. The rise of the first rotating plate 310 will move away from the notch of the notched disc 307. At this time, through the movement of the first rotating plate 310 away from the lower protrusion 305, the rear wheel 202 and the front wheel 20... With all three restrictions lifted, personnel can begin pushing device 1. After releasing the first pressing block 3, spring 8 will push the lowering rod 301 downwards. The downward movement of the lowering rod 301 will cause the first pressing block 3 and the intercepting block 302 to move downwards. The lower slope of the intercepting block 302 will push the slope of the crossbar 306 again, causing the crossbar 306 to move downwards. The downward movement of the crossbar 306 will pull the first spring, which will be transmitted to the lower protrusion 305 and the first rotating plate 310, thus locking the rear wheel 202 and the front wheel 203 again, preventing device 1 from being pushed. If the person only presses one of the first pressing blocks 3 or does not press one, and presses only one, one of them will... The first pressing block 3 will lift the lower pressing rod 301, which will cause one of the intercepting blocks 302 to be squeezed open by the fixed inclined block 303. However, since the other intercepting block 302 does not move, the top of the crossbar 306 will be restricted by the position of the other intercepting block 302. The pull of the first spring cannot squeeze out the intercepting block 302, so the crossbar 306 cannot move. Since the crossbar 306 does not move, the lower protrusion 305 is still stuck in the groove of the drive shaft 304, and the first rotating plate 310 is still located in the notch of the notched disc 307. Thus, by pressing one or not pressing one, the rear wheel 202 and the front wheel 203 are still restricted, and the device 1 cannot be pushed.The movable circular plate 317, through which the second spring continuously pushes downwards, causes the outer cover plate 315 to be lifted when the crossbar 306 is raised. The outer cover plate 315 then lifts the movable circular plate 317 upwards, compressing the second spring. This upward movement of the movable circular plate 317 also causes the guide protrusion 316 to move away from the groove of the front wheel frame 309. This ensures that the front wheel frame 309 is not affected by the guide protrusion 316 during rotation. After the operator releases the first pressing block 3, the crossbar 306 moves downwards. The outer plate 315 descends along with the second spring, which in turn pushes the movable circular plate 317 downwards. This downward movement of the circular plate 317 causes the guide protrusion 316 to descend as well. The guide protrusion 316 then contacts the groove of the front wheel frame 309, pressing against it. As pressure is applied, the guide protrusion 316 gradually pushes the front wheel frame 309 until it finally rests at the bottom of the groove. This keeps the front wheel frame 309 in a vertical position.

[0024] Please see Figure 1 - Figure 12 Based on the above embodiments, in another embodiment of the present invention, an opening plate 206 is rotatably connected to the inner wall of the device 1, a spool 205 is fixedly connected to the circumferential surface of the opening plate 206, one end of an electric gun wire 204 is fixedly connected to the circumferential surface of the spool 205, and an electric gun 2 is fixedly connected to the other end of the electric gun wire 204. A second extrusion block 4 is slidably connected to the inner wall of the electric gun 2, a bending rod 401 is rotatably connected to the inner wall of the electric gun 2, upper and lower inclined blocks 402 are slidably connected to the inner wall of the electric gun 2, an inclined push block 403 is slidably connected to the inner wall of the electric gun 2, an inclined long rod 404 is rotatably connected to the surface of the inclined push block 403, and a trapezoidal block 405 is slidably connected to the inner wall of the device 1. The surface of the trapezoidal block 405 is provided with an inclined surface. The trapezoidal block 405 exits from the limiting groove of the electric gun 2. Without pressing the second extrusion block 4, the trapezoidal block 405 is always stuck in the limiting groove, and the electric gun 2 cannot be pulled out. Even during movement or vibration, the electric gun 2 will not fall off the device 1.

[0025] A fixing block 408 is fixedly connected to the inner wall of device 1. A lower support rod 407 is slidably connected to the inner wall of the fixing block 408. A semi-circular protrusion 406 is fixedly connected to the top of the lower support rod 407. A semi-circular groove is opened on the inner wall of the electric gun 2. When the charging pile is not stopped or the wheels are not locked, the crossbar 306 is in the upper position. The lower support rod 407 drives the semi-circular protrusion 406 upward. The semi-circular protrusion 406 is inserted into the semi-circular groove of the electric gun 2, and the electric gun 2 cannot be pulled out.

[0026] The electric gun 2 has a limiting groove on its surface. A second torsion spring is installed between the inner wall of the opening plate 206 and the inner wall of the device 1. The second torsion spring can retract the rotating opening plate 206 back to the center. A third spring is installed between the surface of the inclined push block 403 and the inner wall of the electric gun 2. A fourth spring is installed between the top of the trapezoidal block 405 and the inner wall of the device 1. The bottom of the trapezoidal block 405 is located in the limiting groove of the electric gun 2. The position of the trapezoidal block 405 can lock the electric gun 2 inside the device 1. A fifth spring is installed between the surface of the fixing block 408 and the bottom of the semi-circular protrusion 406. The bottom of the lower support rod 407 is located below the bottom of the crossbar 306.

[0027] An upper plate 5 is slidably connected to the inner wall of device 1. An upper support rod 502 is slidably connected to the inner wall of device 1, with its top located above the surface of the upper plate 5. One end of a second rotating rod 504 is rotatably connected to the inner wall of the upper support rod 502. A second rotating plate 503 is rotatably connected to the inner wall of device 1. A left extrusion block 505 is slidably connected to the inner wall of device 1, with its top rotatably connected to the other end of the second rotating rod 504. A right extrusion block 507 is slidably connected to the inner wall of device 1. A third rotating plate 506 is rotatably connected to the inner wall of device 1, with one end rotatably connected to the surface of the left extrusion block 505 and the other end rotatably connected to the surface of the right extrusion block 507. The surface of the left extrusion block 505 is provided with an inclined surface. An L-shaped rod 501 is slidably connected to the inner wall of device 1, with a gap between the surface of the L-shaped rod 501 and the inner wall of device 1. A No. 6 spring, a No. 3 rotating rod 511 is rotatably connected to the surface of the L-shaped rod 501, a No. 3 torsion spring is set between the inner wall of the No. 3 rotating rod 511 and the surface of the device 1, a small blocking block is set on the surface of the L-shaped rod 501, a protruding circular plate 509 is rotatably connected to the inner wall of the device 1, a rotating protrusion 510 is rotatably connected to the surface of the protruding circular plate 509, a moving block 508 is slidably connected to the inner wall of the device 1, the bottom of the moving block 508 is set with an arc surface, the top of the moving block 508 is set with an inclined surface, a No. 5 torsion spring is set between the inner wall of the protruding circular plate 509 and the inner wall of the device 1, at this time, the No. 2 rotating plate 503 can only rotate counterclockwise and cannot rotate clockwise, the reel 205 can only release the electric gun wire 204 and cannot retract it, after the electric gun 2 is pulled out, the reel 205 is locked to only release in the direction, when the user pulls out the cable, the cable will not retract itself after being pulled out.

[0028] A long cylindrical block 512 is slidably connected to the surface of the second rotating plate 503. A rack plate 513 is slidably connected to the inner wall of the second rotating plate 503. A fourth rotating rod 516 is rotatably connected inside the second rotating plate 503. One end of the fourth rotating rod 516 is rotatably connected to the surface of the long cylindrical block 512, and the other end of the fourth rotating rod 516 is rotatably connected to the surface of the rack plate 513. A fourth torsion spring is provided between the inner wall of the fourth rotating rod 516 and the inner wall of the second rotating plate 503. A gear 514 is rotatably connected to the inner wall of the second rotating plate 503. The rack plate 513 meshes with the gear 514. A fourth rotating plate 515 is fixedly connected to the top of the gear 514. The gear 514 drives the fourth rotating plate 515 to rotate. When the user or vehicle pulls the cable forcefully, the locking direction of the reel 205 automatically switches, and the cable can continue to be pulled out without being subjected to excessive pulling force due to the locking of the reel 205. The internal wires and connectors of the cable are protected.

[0029] In this embodiment, during operation: The second compression block 4 is pressed by the operator while the gun is being drawn. The compression pushes one end of the bent rod 401, causing the other end of the bent rod 401 to move the upper inclined surface of the upper and lower inclined blocks 402 downwards. As the upper and lower inclined blocks 402 move downwards, the lower inclined surface pushes the inclined push block 403, causing it to move. During this movement, the inclined push block 403 pulls the third spring, and simultaneously, the movement of the inclined push block 403 pushes the inclined long rod 404 to move. 4. During the movement, it will contact the inclined surface of trapezoidal block 405, causing trapezoidal block 405 to be lifted and moved into the equipment 1. During the movement, trapezoidal block 405 will compress spring number four, and the lifting of trapezoidal block 405 will cause it to disengage from the limiting groove on the surface of electric gun 2. Thus, by manually pressing the second pressing block 4, trapezoidal block 405 can be lifted and electric gun 2 can be pulled out. After electric gun 2 is pulled out, spring number four will push trapezoidal block 405 downward. When electric gun 2 is manually pushed into the equipment 1, the surface of electric gun 2 will press against the inclined surface of trapezoidal block 405, causing the trapezoidal block 405 to move into the equipment 1. Block 405 moves upward and compresses spring number four until electric gun 2 moves to the internal limiting position of device 1. Trapezoidal block 405 is then pushed into the limiting groove of electric gun 2 by spring number four. Through the semi-circular protrusion 406, before the crossbar 306 has fully fallen, spring number five will spring up the semi-circular protrusion 406, causing its surface to engage with the semi-circular groove of electric gun 2. This prevents personnel from removing electric gun 2 during transportation until personnel completely stop device 1, causing the crossbar 306 to fall. The crossbar 306 will then push the lower support rod. 407. The lower support rod 407 pulls the semi-circular protrusion 406 and compresses the No. 5 spring. At the same time, the surface of the semi-circular protrusion 406 will move away from the semi-circular groove, so that the personnel can take out the electric gun 2. When the equipment has not stopped, the semi-circular protrusion 406 will protrude into the inner wall of the equipment 1 through the transmission. When the personnel push the electric gun 2, the electric gun 2 will contact the semi-circular arc surface of the semi-circular protrusion 406. The electric gun 2 will push the semi-circular protrusion 406 downward until the electric gun 2 is fully inserted. The semi-circular protrusion 406 will be pushed into the electric gun 2 by the No. 5 spring, thereby locking the electric gun 2.

[0030] By manually pressing the second extrusion block 4 via the set reel 205, the trapezoidal block 405 is lifted through conduction, and the electric gun 2 is pulled out simultaneously. The lifting of the trapezoidal block 405 will cause the upper plate 5 to move upward. The upward movement of the upper plate 5 will push the upper support rod 502 upward. The upward movement of the upper support rod 502 will cause the second rotating rod 504 to move. The movement of the second rotating rod 504 will pull the left extrusion block 505. The movement of the left extrusion block 505 will cause the third rotating plate 506 to rotate. The rotation of the third rotating plate 506 will push the right extrusion block 507 to move. After the right extrusion block 507 moves, it will be located to the right of the second rotating plate 503. At this time, the electric gun wire 204 is pulled, and the electric gun wire 204 drives... The spool 205 rotates counterclockwise, stretching the second torsion spring. The groove of the opening plate 206 contacts the surface of the second rotating plate 503, pushing it to rotate. The right extrusion block 507, located on the right, does not obstruct the counterclockwise rotation of the second rotating plate 503. Simultaneously, the sixth spring pulls the L-shaped rod 501 back to its original position. The movement of the L-shaped rod 501 causes the third rotating rod 511 to move. The third rotating rod 511 contacts the rotating protrusion 510 and is pushed to rotate clockwise. The small blocking block on the surface of the L-shaped rod 501 does not restrict the third rotating rod 511.At this point, if the operator does not pull the electric gun 2, or inserts the electric gun 2 into the vehicle, the second torsion spring will pull the reel 205 back to its original position. However, due to the right squeezing block 507, the second rotating plate 503 cannot rotate clockwise. The second rotating plate 503 will block it through the notch in the opening plate 206, preventing the opening plate 206 from rotating clockwise. Thus, the electric gun wire 204 will be locked and cannot be retrieved. After the operator fully charges the electric gun 2 and inserts it into the device 1, the electric gun 2 will squeeze the L-shaped rod 501. The movement of the L-shaped rod 501 will stretch the sixth spring, and the L-shaped rod 5... The movement of rod 511 will cause the third rotating rod 511 to move. The movement of the third rotating rod 511 will bring it into contact with and push the rotating protrusion 510. The third rotating rod 511 will be blocked by the small blocking block, preventing it from rotating counterclockwise. The rotating protrusion 510 will be pushed to rotate, which will cause the protruding circular plate 509 to rotate. The rotation of the protruding circular plate 509 will pull the fifth torsion spring. After the third rotating rod 511 moves past the rotating protrusion 510, the fifth torsion spring will cause the protruding circular plate 509 and the rotating protrusion 510 to return to their original positions. The rotation of the protruding circular plate 509 will then interact with the arc surface of the moving block 508. The contact between the moving block 508 and the inclined surface of the left extrusion block 505 pushes the moving block 508 upward. The inclined surface of the moving block 508 then contacts the inclined surface of the left extrusion block 505, thus pushing the left extrusion block 505 to move to the left side of the second rotating plate 503. The movement of the left extrusion block 505 causes the third rotating plate 506 to rotate. The rotation of the third rotating plate 506 correspondingly pulls the right extrusion block 507, causing the right extrusion block 507 to move away from the right side of the second rotating plate 503. This makes the second rotating plate 503 able to rotate clockwise but unable to rotate counterclockwise due to the third rotating plate 506. Simultaneously, the left extrusion block... During the movement of 505, the second rotating rod 504 will move. The movement of the second rotating rod 504 will pull down the upper support rod 502, so that the top of the upper support rod 502 returns to the surface of the upper plate 5. The second torsion spring will start to drive the wire wheel 205 to rotate clockwise. The wire wheel 205 will start to retract the electric gun wire 204 until the electric gun wire 204 is retracted. After the electric gun wire 204 is retracted, the second torsion spring is fully stretched. If the person does not unlock and pull the electric gun wire 204, the wire wheel 205 will not be able to rotate counterclockwise due to the restriction of the left squeezing block 505, and the electric gun wire 204 cannot be pulled out.When the electric gun wire 204 is forcibly pulled by personnel via the oblong block 512, the electric gun wire 204 drives the wire wheel 205 to rotate, causing the notch of the opening plate 206 to press against the surface of the second rotating plate 503. The forceful pull causes the notch of the opening plate 206 to press the oblong block 512 towards the inner wall of the second rotating plate 503. This movement of the oblong block 512 causes the fourth rotating rod 516 to rotate. During this rotation, the fourth rotating rod 516 twists the fourth torsion spring, which in turn pulls the rack plate 513 to move. The rack plate 513 moves towards the inner wall of the second rotating plate 503, causing the second rotating plate 503 to rotate along with the gear 514. The rotation of the gear 514 drives the fourth rotating plate 515 to rotate, which in turn pushes the surface of the left extrusion block 505. The left extrusion block 505 is then pushed away from the left side of the second rotating plate 503. Through this transmission, the right extrusion block 507 moves to the right side of the second rotating plate 503, thus allowing the electric gun wire 204 to be pulled out, preventing it from being forcibly damaged.

[0031] It is understood that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. An alternating current charging pile with a mobile function, characterized in that, include: The device (1) has a drive shaft (304) rotatably connected to its inner wall. A rear wheel (202) is fixedly connected to the surface of the drive shaft (304). Grooves are equidistantly provided on the circumferential surface of the drive shaft (304). A front wheel frame (309) is rotatably connected to the inner wall of the device (1). A rotating shaft (308) is rotatably connected to the inner wall of the front wheel frame (309). A front wheel (203) is fixedly connected to the circumferential surface of the rotating shaft (308). A notched disc (307) is fixedly connected to the circumferential surface of the rotating shaft (308). A handle (201) is fixedly connected to the inner wall of the device (1). A first extrusion block (3) is slidably connected to the inner wall of the handle (201). A lower pressure rod (301) is fixedly connected to the surface of the first extrusion block (3). An intercepting block (302) is slidably connected to the inner wall of the lower pressure rod (301). 02) The surface is provided with two inclined surfaces, and a fixed inclined block (303) is fixedly connected to the inner wall of the device (1). A crossbar (306) is slidably connected to the inner wall of the device (1). A lower protrusion (305) is fixedly connected to the bottom of the crossbar (306). A linkage rod (314) is slidably connected to the inner wall of the front wheel frame (309). The top of the linkage rod (314) is rotatably connected to the bottom of the crossbar (306). One end of a first rotating rod (313) is rotatably connected inside the linkage rod (314). The other end of the first rotating rod (313) is rotatably connected to a pulling rod (312). One end of a connecting line (311) is fixedly connected to the surface of the pulling rod (312). A first rotating plate (310) is rotatably connected to the inner wall of the front wheel frame (309). The other end of the connecting line (311) is fixedly connected to the surface of the first rotating plate (310).

2. The AC charging pile with mobile function according to claim 1, characterized in that, The device (1) has a movable circular plate (317) slidably connected to its inner wall. The front wheel frame (309) has a groove on its surface. The bottom of the movable circular plate (317) is fixedly connected to a guide protrusion (316), and the top of the movable circular plate (317) is fixedly connected to an outer cover plate (315).

3. The AC charging pile with mobile function according to claim 2, characterized in that, A first spring is provided between the surface of the crossbar (306) and the inner wall of the device (1). A first torsion spring is provided between the inner wall of the first rotating plate (310) and the inner wall of the front wheel frame (309). A second spring is provided between the top of the moving circular plate (317) and the inner wall of the device (1). The bottom of the outer cover plate (315) is located above the surface of the crossbar (306). An eighth spring is provided between the surface of the intercepting block (302) and the inner wall of the lower pressure rod (301). A seventh spring is provided between the top of the lower pressure rod (301) and the inner wall of the device (1). The first extrusion block (3), the lower pressure rod (301), the intercepting block (302), and the fixed inclined block (303) are symmetrically arranged with the device (1) as the center line.

4. The AC charging pile with mobile function according to claim 3, characterized in that, The device (1) has an opening plate (206) rotatably connected to its inner wall. A spool (205) is fixedly connected to the circumferential surface of the opening plate (206). One end of an electric gun wire (204) is fixedly connected to the circumferential surface of the spool (205). The other end of the electric gun wire (204) is fixedly connected to an electric gun (2). A second extrusion block (4) is slidably connected to the inner wall of the electric gun (2). A bending rod (401) is rotatably connected to the inner wall of the electric gun (2). An upper and lower inclined block (402) is slidably connected to the inner wall of the electric gun (2). An inclined push block (403) is slidably connected to the inner wall of the electric gun (2). An inclined long rod (404) is rotatably connected to the surface of the inclined push block (403). A trapezoidal block (405) is slidably connected to the inner wall of the device (1). An inclined surface is provided on the surface of the trapezoidal block (405).

5. The AC charging pile with mobile function according to claim 4, characterized in that, The device (1) has a fixed block (408) fixedly connected to its inner wall, and a lower support rod (407) is slidably connected to the inner wall of the fixed block (408). A semi-circular protrusion (406) is fixedly connected to the top of the lower support rod (407), and a semi-circular groove is provided on the inner wall of the electric gun (2).

6. The AC charging pile with mobile function according to claim 5, characterized in that, The electric gun (2) has a limiting groove on its surface. A second torsion spring is provided between the inner wall of the opening plate (206) and the inner wall of the device (1). A third spring is provided between the surface of the inclined push block (403) and the inner wall of the electric gun (2). A fourth spring is provided between the top of the trapezoidal block (405) and the inner wall of the device (1). The bottom of the trapezoidal block (405) is located in the limiting groove of the electric gun (2). A fifth spring is provided between the surface of the fixing block (408) and the bottom of the semi-circular protrusion (406). The bottom of the lower support rod (407) is located below the bottom of the crossbar (306).

7. The AC charging pile with mobile function according to claim 6, characterized in that, The inner wall of the device (1) is slidably connected to an upper plate (5), and an upper support rod (502) is slidably connected to the inner wall of the device (1). The top of the upper support rod (502) is located above the surface of the upper plate (5). The inner wall of the upper support rod (502) is rotatably connected to one end of a second rotating rod (504). The inner wall of the device (1) is rotatably connected to a second rotating plate (503). The inner wall of the device (1) is slidably connected to a left extrusion block (505). The top of the left extrusion block (505) is rotatably connected to the other end of the second rotating rod (504). The inner wall of the device (1) is slidably connected to a right extrusion block (507). The inner wall of the device (1) is rotatably connected to a third rotating plate (506). One end of the third rotating plate (506) is rotatably connected to the surface of the left extrusion block (505), and the other end of the third rotating plate (506) is rotatably connected to the surface of the right extrusion block (507). The extrusion block (505) has a sloping surface. An L-shaped rod (501) is slidably connected to the inner wall of the device (1). A No. 6 spring is provided between the surface of the L-shaped rod (501) and the inner wall of the device (1). A No. 3 rotating rod (511) is rotatably connected to the surface of the L-shaped rod (501). A No. 3 torsion spring is provided between the inner wall of the No. 3 rotating rod (511) and the surface of the device (1). A small blocking block is provided on the surface of the L-shaped rod (501). A protruding circular plate (509) is rotatably connected to the inner wall of the device (1). A rotating protrusion (510) is rotatably connected to the surface of the protruding circular plate (509). A moving block (508) is slidably connected to the inner wall of the device (1). An arc surface is provided at the bottom of the moving block (508). A sloping surface is provided at the top of the moving block (508). A No. 5 torsion spring is provided between the inner wall of the protruding circular plate (509) and the inner wall of the device (1).

8. The AC charging pile with mobile function according to claim 7, characterized in that, The second rotating plate (503) has a long cylindrical block (512) slidably connected to its surface. The inner wall of the second rotating plate (503) has a rack plate (513) slidably connected to its inner wall. The second rotating plate (503) has a fourth rotating rod (516) rotatably connected inside its interior. One end of the fourth rotating rod (516) is rotatably connected to the surface of the long cylindrical block (512), and the other end of the fourth rotating rod (516) is rotatably connected to the surface of the rack plate (513). A fourth torsion spring is provided between the inner wall of the fourth rotating rod (516) and the inner wall of the second rotating plate (503). A gear (514) is rotatably connected to the inner wall of the second rotating plate (503). The rack plate (513) meshes with the gear (514). The top of the gear (514) is fixedly connected to the fourth rotating plate (515).

9. A method for using an AC charging pile with a mobile function, using the AC charging pile with a mobile function of claim 8, characterized in that, Includes the following steps: Step 1: When personnel push the equipment (1), they need to press the No. 1 extrusion block (3) with both hands respectively. The No. 1 extrusion block (3) drives the lower pressure rod (301) to move upward. During the movement of the lower pressure rod (301), it will squeeze the No. 8 spring. The lifting of the lower pressure rod (301) will pull the intercepting block (302) upward. The intercepting block (302) is constantly pushed by the No. 7 spring. After the upper inclined surface of the intercepting block (302) contacts the inclined surface of the fixed inclined block (303), the intercepting block (302) will be pushed to move against the inner wall of the lower pressure rod (301). During the movement of the intercepting block (302), it will squeeze the No. 8 spring. After the two sides of the intercepting block (302) are pushed apart by the inclined surface of the fixed inclined block (303), the No. 1 spring will pull the horizontal bar (306) upward. The upward movement of the horizontal bar (306) will drive the lower protrusion. (305) Away from the groove of the drive shaft (304), the crossbar (306) will pull the linkage rod (314) upward, the linkage rod (314) will pull the first rotating rod (313) upward, the movement of the first rotating rod (313) will drive the pulling rod (312) to slide along the inner wall of the front wheel frame (309), the pulling rod (312) will pull the connecting line (311), the connecting line (311) will drive the first rotating plate (310) to move upward, the first rotating plate (310) will squeeze the first torsion spring, the rise of the first rotating plate (310) will move away from the notch of the notched disc (307), at this time, by moving away from the first rotating plate (310) and the lower protrusion (305), the rear wheel (202) and the front wheel (203) are both released from restriction, and the personnel can start to push the equipment (1); Step 2: After the personnel release the No. 1 squeezing block (3), the No. 8 spring will push the lower pressure rod (301) downward. The lower pressure rod (301) will drive the No. 1 squeezing block (3) and the intercepting block (302) downward. The lower slope of the intercepting block (302) will push the slope of the crossbar (306) again, causing the crossbar (306) to be pushed downward. The downward movement of the crossbar (306) will pull the No. 1 spring, which will be transmitted to the lower protrusion (305) and the No. 1 rotating plate (310) downward. Therefore, the rear wheel (202) and the front wheel (203) will be locked again, making the equipment (1) unable to be pushed. If a person presses only one of the No. 1 squeezing blocks (3) or does not press one, when one is pressed, one of the No. 1 squeezing blocks (3) will lift the lower pressure rod (301), which will cause one of the intercepting blocks (302) to be squeezed open by the fixed inclined block (303). Since the other intercepting block (302) does not move, the top of the crossbar (306) will be restricted by the position of the other intercepting block (302). The pull of the No. 1 spring cannot squeeze out the intercepting block (302), so the crossbar (306) cannot move. Since the crossbar (306) does not move, the lower protrusion (305) is still stuck in the groove of the drive shaft (304), and the No. 1 rotating plate (310) is still located in the notch of the notched disc (307). Thus, by pressing one or not pressing one, the rear wheel (202) and the front wheel (203) are still restricted, and the device (1) cannot be pushed. Step 3: Through the set movable circular plate (317), the second spring will continuously push the movable circular plate (317) downward, and when the crossbar (306) is lifted, the outer cover plate (315) will be lifted. The outer cover plate (315) will lift the movable circular plate (317) upward, and the movable circular plate (317) will compress the second spring upward. The movable circular plate (317) will lift the guide protrusion (316) away from the groove of the front wheel frame (309). In this way, the front wheel frame (309) will not be affected by the guide protrusion (316) during rotation. After the personnel release the first pressing block (3) with both hands, the outer cover plate (315) will descend along with the second spring as the crossbar (306) is pushed downward. Step 4: Spring No. 2 will push the moving circular plate (317) downward. The moving circular plate (317) downward will drive the guide protrusion (316) downward. The guide protrusion (316) downward will contact the groove of the front wheel frame (309). Then the guide protrusion (316) will squeeze the groove of the front wheel frame (309). During the continuous application of pressure, the guide protrusion (316) will gradually push the front wheel frame (309) so that the guide protrusion (316) finally falls to the bottom of the groove of the front wheel frame (309). This will drive the front wheel frame (309) to keep the wheel in a vertical state.

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