Stereoscopic charging station for electric vehicles

Abstract

The invention discloses an electric vehicle three-dimensional charging station which comprises a frame body, two lifting tables and a plurality of electric vehicle trays, a plurality of charging layers are vertically arranged on the frame body, and each charging layer comprises two charging positions which are bilaterally symmetrical; female charging connection assemblies are respectively arranged in two charging positions of each charging layer on the frame body, and each female charging connection assembly is externally connected with a charging pile; the two lifting tables are tightly attached to the left end and the right end of the frame body respectively, and each lifting table is connected with the frame body through a lifting mechanism and can move vertically. A tray transverse movement driving device is arranged on each lifting platform; each electric vehicle tray is located on the charging position or the lifting platform, and a sub-charging connection assembly is arranged on the side face, close to the center of the frame body, of each electric vehicle tray in the transverse direction. And the sub-charging connection assembly on each electric vehicle tray is connected with at least one charging gun arranged on the electric vehicle tray through a circuit. The three-dimensional charging station has the advantages of being high in integrity, compact in layout, high in space utilization rate, safe in charging and rapid in charging.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle charging and is applied to three-dimensional charging, which can effectively solve the problem of multi-layer three-dimensional charging, so that multiple electric vehicles can be charged simultaneously in a small space. Background Art

[0002] At present, electric vehicles are charged by installing charging piles on the ground. If multiple electric vehicles are charged at the same time, they will occupy multiple ground parking spaces at the same time, which requires more and larger ground. Some large and medium-sized cities, especially the central areas, are land-scarce and cannot provide more and larger ground charging stations. This causes great inconvenience to electric vehicle users, restricts the promotion of electric vehicles, and affects the carbon emission targets of many cities.

[0003] The announcement number is CN213980136U, and the name is a small three-dimensional garage. It discloses a circular parking space layout method for horizontal storage and access of vehicles, but does not disclose the relevant technical solutions for how to charge electric vehicles. For example, the announcement number is CN116335449A, and the name is a horizontally movable caisson three-dimensional garage and its storage and access method. It details a circular caisson garage that can horizontally exchange vehicles. Although it describes the process of vehicles from the entrance to the outer circular parking space, the garage cannot realize the horizontal movement of vehicles for charging and the independently set charging space layers.

[0004] The patent with publication number CN114043884A discloses a new type of intelligent three-dimensional charging station, which includes a substation, cable a, a distribution box, cable b, an intelligent charging manager, cable c, a three-dimensional garage frame, a layer bracket, a charger, a vehicle loading plate, a busbar, a collector, a charging gun, a monitoring camera, a lighting lamp, and a car picker. The characteristics are as follows: the substation connects to cable a, cable a is connected to the distribution box, the distribution box connects to cable b, cable b is connected to the intelligent charging manager, the intelligent charging manager connects to cable c, and cable c is connected to the charger on each layer along the three-dimensional garage frame. The charger is installed under the layer bracket of each layer, and a busbar is installed on the outside of the charger. The vehicle loading plate is stored on the layer bracket, a collector is installed on one side of the vehicle loading plate, one end of the collector is connected to the charging gun, and the charging gun is hung on one side of the vehicle loading plate. A monitoring camera and a lighting lamp are installed on the top of the three-dimensional garage frame, and a car picker is installed on the side of the three-dimensional garage frame. In this way, a complete three-dimensional charging station is formed. Its prominent defects are: the chargers are installed under the layer brackets of each layer, and many chargers are located at high positions on the frame. The chargers are prone to heat, especially during DC fast charging. Because the frame is relatively high and each charger is located at a high position, it is difficult to adopt cooling, arc extinguishing and other protective measures for each charger. Once overheating causes open fire, the entire charging station will burn quickly and cannot be quickly extinguished. In addition, its structural configuration is unreasonable. During the process of storing and retrieving vehicles, the vehicles need to be rotated, which makes it difficult to store and retrieve vehicles, and it is inconvenient for vehicles to enter and exit the garage, resulting in a large actual area.

[0005] In addition, in the prior art, when a vehicle-carrying mechanism equipped with an electric vehicle enters the charging position of a three-dimensional charging station and connects to the charging facility to draw power, the vehicle-carrying mechanism equipped with the electric vehicle is mobile and will generate vibration. In a vibrating environment, inaccurate docking may occur, causing damage to the docking mechanism. Alternatively, in a vibrating environment, other docking mechanisms may produce false connections, thereby generating heat, reducing the charging power, and extending the charging time. This cannot be effectively resolved, leaving safety hazards. Summary of the invention

[0006] The invention proposes a three-dimensional charging station, which has the advantages of strong integrity, compact layout, high space utilization, safe charging and fast charging.

[0007] The technical solution adopted by the present invention is as follows.

[0008] An electric vehicle three-dimensional charging station, characterized in that it comprises: a frame, the frame is a frame structure, a plurality of charging layers are arranged vertically on the frame, each charging layer comprises two charging positions that are bilaterally symmetrical; a female charging docking assembly is provided in each of the two charging positions of each charging layer on the frame, the female charging docking assembly is installed between the two charging positions on the frame; each female charging docking assembly is externally connected to a charging pile; Two lifting platforms are respectively arranged close to the left and right ends of the frame, each lifting platform is connected to the frame through a lifting mechanism and can move vertically; each lifting platform is equipped with a tray lateral movement driving device; A plurality of electric vehicle trays, each of which is located at a charging position or a lifting platform, and each of which is provided with a sub-charging connection assembly near the center side of the frame in the horizontal direction; the sub-charging connection assembly on each electric vehicle tray is connected to at least one charging gun arranged on the electric vehicle tray through a line; A charging position transverse pallet rack moving guide rail is provided under each charging position, and a lifting platform pallet rack moving guide rail is provided on each lifting platform; when the lifting mechanism controls the lifting platform pallet rack moving guide rail on the lifting platform to align with the charging position transverse pallet rack moving guide rail of a charging position close to a charging position on the lifting platform side, the pallet lateral movement drive device can control the electric vehicle pallet on the lifting platform to enter the charging position and dock the sub-charging docking assembly with a mother charging docking assembly, or control the electric vehicle pallet on the charging position to enter the lifting platform.

[0009] During operation, the lifting platform is lifted by the lifting mechanism and aligned with a charging position provided with a vehicle carrier, the tray lateral movement driving device moves the vehicle carrier of the charging position to the lifting platform, and then the lifting platform is lowered to the ground by the lifting mechanism; the electric vehicle to be charged is driven onto the electric vehicle tray on the lifting platform, the charging gun is inserted into the charging position of the electric vehicle, and the driver leaves the lifting platform; the lifting platform is lifted by the lifting mechanism and aligned with an empty charging position, the tray lateral movement driving device controls the electric vehicle tray on the lifting platform to enter the charging position and dock the sub-charging docking assembly with the sub-charging docking assembly in the target charging position; then, the charging stack supplies power, and the charging gun starts to charge the electric vehicle; after charging is completed, the lifting platform is lifted by the lifting mechanism and aligned with the charging position where charging is completed, the tray lateral movement driving device controls the electric vehicle tray on the target charging position to enter the lifting platform, and the lifting mechanism lowers the lifting platform to the ground; the driver pulls out the charging gun from the charging position of the electric vehicle, and the driver drives away from the lifting platform.

[0010] The beneficial effects of the present invention are as follows: 1. When the two lifting platforms are lowered to the ground by the lifting mechanism, the electric vehicles to be charged can be driven into or out of the electric vehicle trays on the lifting platforms from the left front, left rear, right front and right rear directions of the frame, and the vehicles can enter and exit conveniently. The two-way entry and exit design can improve the traffic efficiency and convenience of the charging station, allowing vehicles to quickly enter and exit the charging station from different directions, and reducing the waiting time for vehicles to queue. 2. The vertical space is fully utilized to accommodate more charging facilities on limited land, greatly improving the space utilization rate, and solving the problem that traditional ground charging stations cannot carry out large-scale and intensive charging due to site limitations. The layout is compact and the space utilization rate is high. 3. The frame is a frame structure, which is convenient for ventilation, heat dissipation and dangerous situation handling. 4. Each mother charging docking assembly is connected to the charging pile externally. In this way, there is no charger in the prior art on the frame, which solves the problem that in the prior art, when DC fast charging, due to the high frame and the high position of each charger, it is difficult to adopt cooling, arc extinguishing and other protective measures for each charger.

[0011] As a preferred technical solution, the mother charging docking assembly is connected to the frame through a position self-adjusting device; the position self-adjusting device includes a first connecting vertical plate, a second connecting vertical plate located laterally away from the center side of the frame on the first connecting vertical plate, and a third connecting vertical plate located on the electric vehicle tray; a plurality of support rod mounting holes are laterally provided on the first connecting vertical plate, and a support rod is hinged on each support rod mounting hole, and each support rod is laterally fixed to the second connecting vertical plate away from the center end of the frame; Each support rod is equipped with a spring, one end of which contacts the first connecting plate, and the other end contacts the second connecting plate; a longitudinal middle beam is provided between the two charging positions of each charging layer on the frame, and each second connecting plate is connected to the longitudinal middle beam; the mother charging docking assembly is installed on the second connecting plate; the child charging docking assembly is installed on the third connecting plate. Insertion guide assemblies are provided on the side of the second connecting plate away from the center of the frame in the horizontal direction, and on the side of the third connecting plate close to the center of the frame in the horizontal direction. With this technical solution, each support rod mounting hole is hinged with a support rod, so that the second connection vertical plate is equivalent to a cantilever structure installed on the first connection vertical plate and can move slightly in the normal direction perpendicular to the second connection vertical plate and away from the center of the side of the first connection vertical plate; each support rod is equipped with a spring, and when vibration occurs, the second connection vertical plate can move slightly, and the spring presses the second connection vertical plate when each plug-in main connection guide device is docked, even if the second connection vertical plate and the third connection vertical plate are slightly misaligned, the mother charging docking assembly and the child charging docking assembly on the second connection vertical plate and the third connection vertical plate can be closely docked, and the charging docking assembly installed on the first connection vertical plate and the second connection vertical plate will not be damaged. It can realize that the docking assembly automatically corrects and centers and is tightly combined in an environment where the charging device connection position generates vibration when the vehicle is moving, so as to prevent the occurrence of false connection and ensure charging safety.

[0012] As a preferred technical solution, the plug-in guide assembly includes a number of main guide rods and main guide sleeves with the same number as the main guide rods. When the sub-charging docking assembly is docked with a mother charging docking assembly, each main guide rod is inserted into a main guide sleeve; each electric vehicle tray is connected to the sub-charging docking assembly through a third connecting vertical plate on the lateral side close to the center side of the frame.

[0013] A plurality of main guide rods are disposed laterally on the side of the second connecting plate away from the center of the frame, and a main guide sleeve is disposed laterally on the corresponding position of the side of each third connecting plate close to the center of the frame, and the diameter of the main guide rod gradually decreases in the direction away from the center of the frame to form a pointed head. Alternatively, a plurality of main guide sleeves are disposed laterally on the side of the second connecting plate away from the center of the frame, and a corresponding position of the side of each third connecting plate close to the center of the frame is disposed laterally on the side of the frame, and a main guide sleeve is disposed laterally on the corresponding position of the side of each third connecting plate close to the center of the frame, and a bell mouth is disposed laterally on the end of the main guide sleeve close to the center of the frame. Alternatively, a plurality of main guide sleeves are disposed laterally on the side of the second connecting plate away from the center of the frame, and a corresponding position of the side of each third connecting plate close to the center of the frame is disposed laterally on the side of the frame, and a bell mouth is disposed laterally on the end of the main guide sleeve close to the center of the frame.

[0014] As a preferred technical solution, each mother charging docking assembly is laterally provided with an insertable precision guide assembly at a corresponding position on the side surface away from the center of the frame and on the side surface close to the center of the frame of each sub-charging docking assembly. The insertable precision guide assembly includes a plurality of precision guide rods and a plurality of precision guide sockets. A plurality of precision guide rods are laterally provided on the side surface away from the center of the frame of the mother charging docking assembly, and a precision guide socket is laterally provided on the corresponding position on the side surface close to the center of the frame of each sub-charging docking assembly. The diameter of the precision guide rod gradually decreases in the direction away from the center of the frame to form a pointed head. Alternatively, a plurality of precision guide sockets are laterally provided on the side surface away from the center of the frame of the mother charging docking assembly, and a precision guide rod is laterally provided on the corresponding position on the side surface close to the center of the frame of each sub-charging docking assembly. The diameter of the precision guide rod gradually decreases in the direction close to the center of the frame to form a pointed head. When the sub-charging docking assembly is docked with a mother charging docking assembly, each precision guide rod is inserted into a precision guide socket. Equipped with precise guide components, it is more conducive to the close docking of the main charging docking component and the sub-charging docking component.

[0015] As a preferred technical solution, a first spring positioning groove is coaxially provided on the outer side of each support rod mounting through hole on the side of the first connecting vertical plate close to the second connecting vertical plate, and a first spring positioning groove is coaxially provided on the outer side of each support rod on the side of the second connecting vertical plate close to the first connecting vertical plate, and the two ends of each spring are respectively inserted into the first spring positioning groove closest to it and the first spring positioning groove closest to it. When vibration occurs, when the second connecting vertical plate moves slightly along the normal direction perpendicular to the second connecting vertical plate and away from the center of the side of the first connecting vertical plate, the spring gives the second connecting vertical plate a centripetal force to return to the initial position, automatically adjusting the second connecting vertical plate back to the initial position, and the position is conducive to centering.

[0016] As a preferred technical solution, a support rod is inserted into each support rod mounting hole, and a movable gap is provided between the portion of each support rod inserted into the support rod mounting hole and the support rod mounting hole. The diameter of the portion of each support rod inserted into the support rod mounting hole is smaller than the diameter of the rest of the support rod, so as to form a step on the support rod, and the end of the support rod away from the second connecting vertical plate is provided with a side blocking body, and the distance between the side blocking body and the step is greater than the thickness of the first connecting vertical plate. Alternatively, the end of the support rod away from the second connecting vertical plate is provided with a side blocking body, and the side of the first connecting vertical plate on the support rod close to the second connecting vertical plate is provided with a middle blocking body, and the distance between the side blocking body and the middle blocking body is greater than the thickness of the first connecting vertical plate. There is a movable gap between the part of each support rod inserted into the support rod installation through hole and the support rod installation through hole, so that the second connecting plate is equivalent to a cantilever structure installed on the first connecting plate and can move slightly along the normal direction perpendicular to the second connecting plate and away from the center of the side of the first connecting plate; each support rod is equipped with a spring, and when vibration occurs, the second connecting plate can move slightly. When each plug-in main connecting guide device is docked, the spring presses the second connecting plate tightly, and even if the second connecting plate and the third connecting plate are slightly misaligned, the charging docking components on the second connecting plate and the third connecting plate can be tightly docked. The end of each support rod away from the second connecting plate can be hinged on the support rod installation through hole. As long as the difference between the diameter of the support rod and the diameter of the support rod installation through hole is constant, the distance between the step and the side blocking body or the distance between the side blocking body and the middle blocking body is constant, the maximum movable angle between the support rod and the center axis of the support rod installation through hole is also a constant value.

[0017] As a preferred technical solution, the side blocking body or the middle blocking body is threadedly connected to the support rod. With this technical solution, the end of each support rod away from the second connecting vertical plate can be hinged on the support rod installation through hole. As long as the difference between the support rod diameter and the support rod installation through hole diameter is constant, the distance between the step and the side blocking body or the distance between the side blocking body and the middle blocking body is constant, the maximum movable angle between the support rod and the center axis of the support rod installation through hole is also a constant value. The threaded connection is conducive to adjusting the position of the side blocking body or the middle blocking body.

[0018] As a preferred technical solution, each mother charging docking assembly is provided with a plurality of charging contacts and a plurality of charging auxiliary contacts, and each child charging docking assembly is provided with charging contacts and charging auxiliary contacts corresponding to the charging contacts and charging auxiliary contacts on the mother charging docking assembly. When the mother charging docking assembly is docked with the child charging docking assembly, the charging contacts and charging auxiliary contacts on each mother charging docking assembly are in contact with the corresponding charging contacts and charging auxiliary contacts of the child charging docking assembly. The charging auxiliary contacts are one or more of communication contacts, charging connection contacts, and low-voltage auxiliary power supply contacts. This technical solution makes it easy for the control system to obtain battery charging information and control the charging process.

[0019] As a preferred technical solution, the electric vehicle three-dimensional charging station includes a control system, which is respectively connected to the charging pile, the mother charging docking assembly, the lifting mechanism, and the tray lateral movement drive device.

[0020] As an optimal technical solution, a transverse walking wheel group is respectively installed at the front and rear ends of the bottom surface of the electric vehicle tray, and the transverse walking wheel group includes several transverse walking wheels; a transverse rack is installed between the two transverse walking wheel groups on the bottom surface of the electric vehicle tray, and the front side or rear side of the transverse rack is provided with several teeth.

[0021] As an optimal technical solution, a charging position tray rack is provided below the charging position, and the charging position tray rack includes a longitudinal side beam arranged at the bottom end of the charging position laterally away from the centroid end of the frame body, the front end of the top surface of the longitudinal side beam is laterally connected to the first charging position transverse tray rack moving rail, and the rear end of the top surface of the longitudinal side beam is laterally connected to the second charging position transverse tray rack moving rail; when all the electric vehicle pallets are located at the charging position, the transverse running wheels at the front end of the electric vehicle pallet are located on the first charging position transverse tray rack moving rail, and the transverse running wheels at the rear end of the electric vehicle pallet are located on the second charging position transverse tray rack moving rail, and each sub-charging docking assembly on the electric vehicle pallet is docked with the mother charging docking assembly closest to it.

[0022] As a preferred technical solution, the tray lateral movement driving device includes a guide frame that can move laterally and is arranged on the lifting platform, and the guide frame is provided with a guide frame driving motor and a gear driving motor. The lifting platform tray frame moving guide rail includes a first charging position lateral tray frame moving rail and a second charging position lateral tray frame moving rail. The front side of the leading frame on the lifting platform is provided with a first charging position transverse pallet frame moving rail, and the rear side of the leading frame on the lifting platform is provided with a second charging position transverse pallet frame moving rail; a plurality of gears arranged vertically with the central axis are arranged horizontally at the top of the leading frame, and the gear closest to the frame body is connected to the gear drive motor; when the electric vehicle pallet is located on the lifting platform, the transverse running wheel at the front end of the electric vehicle pallet is located on the first charging position transverse pallet frame moving rail, and the transverse running wheel at the rear end of the electric vehicle pallet is on the second charging position transverse pallet frame moving rail; when the lifting mechanism controls the lifting platform pallet frame moving guide rail on the lifting platform to align with the charging position transverse pallet frame moving guide rail of the frame body close to a charging position on the lifting platform side, the first charging position transverse pallet frame moving rail is aligned with the first charging position transverse pallet frame moving rail, the second charging position transverse pallet frame moving rail is aligned with the second charging position transverse pallet frame moving rail, and each gear is aligned with the toothed surface of the transverse rack on the electric vehicle pallet. The leading frame drive motor is arranged at the bottom of the leading frame, and the leading frame drive motor is connected to the driven wheel arranged at the bottom of the leading frame through a frame drive chain, and the frame drive chain is connected to the leading frame.

[0023] As an optimal technical solution, the lifting platform includes two longitudinal beams, and two parallel transport frame guide rails are horizontally arranged between the two longitudinal beams. The top and bottom ends of each transport frame guide rail are connected with pressure wheels that are longitudinally arranged along the central axis and protrude toward the other transport frame guide rail. The pressure wheels at the top end of each transport frame guide rail are in contact with the top surface of the leading frame, and the pressure wheels at the bottom end of each transport frame guide rail are in contact with the bottom surface of the leading frame.

[0024] As an optimal technical solution, two drive chain support wheels and a leading frame drive motor are longitudinally provided at the bottom end of one of the transport frame guide rails, the two drive chain support wheels are connected to the drive chain, and one of the drive chain support wheels is connected to the leading frame drive motor.

[0025] As a preferred technical solution, a plurality of gear mounting plates are longitudinally arranged on the guide frame, and a gear is mounted on each gear mounting plate.

[0026] The gear drive motor is arranged at the bottom end of the leading frame and is closest to the frame body, and is connected to the gear drive motor through a gear drive chain.

[0027] As an optimal technical solution, each gear mounting plate is vertically provided with a backrest wheel; when the lifting mechanism controls the lifting platform tray rack moving guide rail on the lifting platform to align with the horizontal tray rack moving guide rail of the charging position close to a charging position on the lifting platform side, each backrest wheel is aligned with the non-toothed surface of the transverse rack on the electric vehicle tray.

[0028] As a preferred technical solution, a plurality of guide strips are arranged laterally on the bottom surface of the electric vehicle tray. The longitudinal side beam is laterally connected to a parking space transverse guide rod with the same number of guide strips as the center side of the frame; a plurality of first guide wheel groups are installed on each parking space transverse guide rod, each first guide wheel group includes two first guide wheels symmetrically arranged front and back, and each first guide wheel is arranged vertically; when the electric vehicle tray is located at the charging position, the guide strip on the bottom surface of the electric vehicle tray in each charging position is inserted between the two first guide wheels of the first guide wheel group closest to it; a lifting platform transverse guide rod with the same number of guide strips as the electric vehicle tray is arranged horizontally between the two longitudinal beams, and a plurality of second guide wheel groups are installed on each lifting platform transverse guide rod, each second guide wheel group includes two second guide wheels symmetrically arranged front and back, and each second guide wheel is arranged vertically; when the electric vehicle tray is located on the lifting platform, the guide strip on the bottom surface of the electric vehicle tray is inserted between the two second guide wheels of the second guide wheel group closest to it; when the lifting mechanism controls the lifting platform tray frame moving guide rail on the lifting platform to align with the charging position transverse tray frame moving guide rail of the frame body close to a charging position on the lifting platform side, the lifting platform transverse guide rod is aligned with the parking space transverse guide rod closest to it.

[0029] As a preferred technical solution, an electric vehicle pallet limiting device is provided on each longitudinal side beam.

[0030] As a preferred technical solution, the electric vehicle pallet limiting device includes a rotating longitudinal rod. Each rotating longitudinal rod is connected to a longitudinal side beam on a lateral side close to the centroid of the frame through a plurality of mounting bearings, or each rotating longitudinal rod is connected to the frame through a plurality of mounting bearings and is located on a lateral side close to the centroid of the frame. Stop arms perpendicular to the central axis of the rotating longitudinal rod are respectively provided at both ends; each rotating longitudinal rod is provided with a plurality of active rotating arms, and the top surface of each stop arm and active rotating arm is located above the top surface of the longitudinal side beam; a spring reset assembly is provided on the rotating longitudinal rod. When the lifting mechanism controls the lifting platform pallet rack moving guide rail on the lifting platform to align with the charging position horizontal pallet rack moving guide rail of the frame body close to a charging position on the lifting platform side, each stop arm is aligned between the front side and the rear side of the leading frame. When storing or retrieving a vehicle, the leading frame enters the charging position horizontally from the lifting platform and contacts the active rotating arm in the charging position, causing it to rotate so that each stop arm is located below the top surface of the longitudinal side beam in the charging position; after the storage or retrieval of the vehicle is completed, the leading frame enters the lifting platform, the leading frame does not contact the active rotating arm in the charging position, and each stop arm is reset. When charging, the vehicle drives into the electric vehicle tray on the leading frame of the lifting platform. The lifting mechanism controls the lifting and lowering of the lifting platform and aligns with a charging position on the side of the frame close to the lifting platform. The leading frame on the lifting platform enters a charging position on the side of the frame close to the lifting platform. The leading frame contacts the stop arm in the charging position, causing it to rotate so that each stop arm is located below the top surface of the longitudinal side beam in the charging position, so that the electric vehicle tray can enter the charging position conveniently; the leading frame completely delivers the electric vehicle tray into the charging position and the leading frame returns to the lifting platform. Under the action of the spring reset assembly, each stop arm contacts the side of the electric vehicle tray that is laterally away from the center of the frame and locks the electric vehicle tray in the charging position. After charging is completed, the leading frame on the lifting platform enters a charging position close to the lifting platform side, the leading frame contacts the stop arm in the charging position, rotates it so that each stop arm is located below the top surface of the longitudinal side beam in the charging position, and the leading frame moves the electric vehicle tray out of the charging position and returns it to the lifting platform; the lifting mechanism controls the lifting platform to descend to the ground, and the vehicle drives out from the electric vehicle tray on the leading frame of the lifting platform.

[0031] As a preferred technical solution, a torsion spring is provided on the mounting bearing, or at least one stop arm is connected to the longitudinal side beam via a tension spring, or at least one active rotating arm is connected to the longitudinal side beam via a tension spring.

[0032] As a preferred technical solution, the lifting mechanism includes lifting motors located at the left and right ends of the top of the frame, each lifting platform is connected to the lifting motor closest to it through a lifting chain, and the lifting motor is externally connected to a power supply.

[0033] As an optimal technical solution, a longitudinal lifting shaft is provided at the left and right ends of the top of the frame, each longitudinal lifting shaft is connected to the lifting motor closest to it, and lifting wheels are provided at the front and rear ends of each longitudinal lifting shaft. The lifting wheel at the front end of each lifting wheel and the front end of the lifting platform closest to it, and the lifting wheel at the rear end of each lifting wheel and the rear end of the lifting platform closest to it are all connected by a lifting chain.

[0034] As an optimal technical solution, a number of fixed pulleys are provided on the horizontal side of each lifting wheel at the top of the frame body near the center of the frame body, and two parallel counterweight guide rails are provided vertically below the fixed pulley on the frame body that is farthest from the lifting wheel. Counterweights are running on the two counterweight guide rails, and lifting chains are connected to each fixed pulley and counterweight.

[0035] As a preferred technical solution, the front and rear ends of the left end of the frame and the front and rear ends of the right end of the frame are vertically provided with columns, each column is provided with a vertical guide rail, and the front and rear ends of each lifting platform are provided with guide wheels that can clamp the vertical guide rail closest to it to the left and right. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a southeast axonometric view of a preferred embodiment of the three-dimensional charging station for electric vehicles of the present invention. Figure 2 yes Figure 1 A partial enlarged view of part A. Figure 3 yes Figure 1 A partial enlarged view of part B. Figure 4 yes Figure 3 A partial enlarged view of part F. Figure 5 yes Figure 4 A partial enlarged view of part G. Figure 6 yes Figure 4 A partial enlarged view of part H. Figure 7 yes Figure 1 A partial enlarged view of part D. Figure 8 yes Figure 7 A partial enlarged view of part I. Fig. 9 yes Figure 8 A partial enlarged view of part J. Fig.10 yes Figure 1 A partial enlarged view of part E. Fig.11 yes Fig.10 A partial enlarged view of part K. Fig.12 yes Figure 1 A bottom view of the electric vehicle stereo charging station is shown. Fig.13 yes Fig.12 A partial enlarged view of part M. Fig.14 yes Fig.13 A partial enlarged view of part O. Fig.15 yes Fig.13 A local enlarged view of part N. Fig.16 yes Figure 1 A left view of the electric vehicle stereo charging station is shown. Fig.17 yes Fig.16 A partial enlarged view of the L part. Fig.18 yes Fig.16 A partial enlarged view of part C. Fig.19 yes Figure 1 A front view of a three-dimensional charging station for electric vehicles is shown. Fig. 20 yes Figure 1 A top view of a three-dimensional charging station for electric vehicles is shown.

[0037] Fig.21 yes Figure 1 Northwest axonometric view of the electric vehicle stereo charging station shown. Fig. 22 yes Fig.21 A partial enlarged view of part P. Fig.23 yes Fig.21 A partial enlarged view of the Q part. Fig.24 yes Fig.21 A partial enlarged view of the R part. Fig.25 yes Fig.24 A local enlarged view of the S part. Fig.26 yes Fig.24 A partial enlarged view of the T portion. Fig. 27 yes Fig.24 A partial enlarged view of the U part. Fig.28 yes Figure 1 A schematic structural diagram of a docking device used in the three-dimensional electric vehicle charging station. Fig.29 yes Fig.28 A partial enlarged view of the V part. Fig.30 yes Fig.28 A partial enlarged view of the W part. Fig.31 yes Fig.28 A top view of the docking device. Fig.32 yes Fig.31 A partial enlarged view of part X. Fig.33 yes Fig.28 A docking status diagram of the docking device. Fig.34 yes Fig.33 A partial enlarged view of the Y part. Fig.35 yes Figure 1 A schematic structural diagram of the electric vehicle tray limiting device used in the electric vehicle three-dimensional charging station. Fig.36 yes Fig.35 A local enlarged view of section Z. Fig.37 The present invention is a structural schematic diagram of a pallet limiting device for an electric vehicle. Fig.38 yes Fig.37 A partial enlarged view of part a. Fig.39 The present invention is a structural schematic diagram of a pallet limiting device for an electric vehicle. Fig.40 yes Fig.42A partial enlarged view of part b.

[0038] Fig.41 The present invention is a structural schematic diagram of a docking device. Fig.42 The present invention is a structural schematic diagram of a docking device. Fig.43 yes Fig.42 A partial enlarged view of part c. Fig.44 The present invention is a structural schematic diagram of a docking device. Fig.45 It is a schematic diagram of a vehicle entering and exiting a three-dimensional charging station according to the present invention. Fig.46 yes Figure 1 A usage status diagram of a three-dimensional charging station for electric vehicles is shown.

[0039] Among them: frame-1; charging layer-11; charging position-12; longitudinal side beam-13; first charging position horizontal pallet frame moving rail-14; second charging position horizontal pallet frame moving rail-15; parking space horizontal guide rod-16; first guide wheel-17; column-18; vertical guide rail-19; mother charging docking group-2; longitudinal middle beam-20; first connecting vertical plate-21; second connecting vertical plate-22; support rod mounting hole-23; support rod-24; spring-25; middle blocking body-26; first spring positioning groove-27; first spring positioning groove-28; side blocking body-29; step-210; lifting platform-3; third connecting vertical plate-30; pilot frame-31; pilot frame drive motor-32; gear drive motor-3 ... first charging position horizontal pallet frame moving rail-16; first charging position horizontal pallet frame moving rail-15; first charging position horizontal pallet frame moving rail-16; first charging position horizontal pallet frame moving rail-17; first charging position horizontal pallet frame moving rail-15; first charging position horizontal pallet frame moving rail-16; first charging position horizontal pallet frame moving rail-17; first charging position horizontal pallet frame moving rail-15; first charging position horizontal pallet frame Moving rail-34; second charging position horizontal tray frame moving rail-35; gear-36; handling frame guide rail-37; longitudinal beam-38; pressure wheel-39; gear mounting plate-310; backrest wheel-311; lifting platform lateral guide rod-312; second guide wheel-313; guide platform-314; guide wheel-315; electric vehicle tray-4; lateral walking wheel-41; lateral rack-42; guide bar-43; sub-charging docking assembly-44; lifting motor-5; lifting chain-51; longitudinal lifting shaft-52; lifting wheel-53; fixed pulley-54; counterweight guide rail-55; counterweight-56; main guide rod-6; main guide sleeve-61; precision guide rod-62; precision guide socket-63; charging contact-64; charging auxiliary contact-65; Rotating longitudinal rod-7; stop arm-71; mounting bearing-72; active rotating arm-73; torsion spring-74; tension spring-75; rolling wheel-76; anti-fall device-8; electric car 9; ground access channel-91. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] Example 1. Figure 1-39 As shown, a three-dimensional charging station for electric vehicles is characterized by comprising: The frame 1 is a frame structure, and five charging layers 11 are arranged vertically on the frame 1, and each charging layer 11 includes two charging positions 12 that are symmetrical on both sides; each charging position 12 of each charging layer 11 on the frame 1 is provided with a female charging docking assembly 2. The female charging docking assembly 2 is installed between the two charging positions 12 on the frame; each female charging docking assembly 2 is externally connected to a charging pile. Two lifting platforms 3 are respectively arranged close to the left and right ends of the frame 1, and each lifting platform 3 is connected to the frame 1 through a lifting mechanism and can move vertically; each lifting platform 3 is installed with a tray lateral movement driving device. Ten electric vehicle trays 4, each electric vehicle tray 4 is located on the charging position 12 or the lifting platform 3, and each electric vehicle tray 4 is provided with a sub-charging docking assembly 44 near the central side of the frame 1 in the horizontal direction; the sub-charging docking assembly 44 on each electric vehicle tray 4 is connected to at least one charging gun arranged on the electric vehicle tray 4 through a line, which is not shown in the figure.

[0042] A charging position transverse pallet rack moving guide rail is provided under each charging position 12, and a lifting platform pallet rack moving guide rail is provided on each lifting platform 3; when the lifting mechanism controls the lifting platform pallet rack moving guide rail on the lifting platform 3 to align with the charging position transverse pallet rack moving guide rail of the frame 1 close to a charging position 12 on the side of the lifting platform 3, the pallet lateral movement drive device can control the electric vehicle pallet 4 on the lifting platform 3 to enter the charging position 12 and make the sub-charging docking component 44 dock with a mother charging docking component 2, or control the electric vehicle pallet 4 on the charging position 12 to enter the lifting platform 3.

[0043] In this embodiment, nine of the ten electric vehicle trays 4 are located on the charging position 12, and one is located on the lifting platform 3 on the right side of the frame. The mother charging docking assembly 2 is connected to the frame through a position self-adjusting device. The position self-adjusting device includes a first connecting plate 21, a second connecting plate 22 located laterally away from the center side of the frame 1 of the first connecting plate 21, and a third connecting plate 30 located on the electric vehicle tray 4; four support rod mounting holes 23 are laterally provided on the first connecting plate 21, and each support rod mounting hole 23 is hinged with a support rod 24, and each support rod 24 is fixed to the second connecting plate 22 laterally away from the center end of the frame 1.

[0044] A longitudinal middle beam 20 is provided between two charging positions 12 of each charging layer 11 on the frame 1, and each second connecting plate 22 is connected to the longitudinal middle beam 20; the mother charging docking assembly 2 is installed on the second connecting plate 22; and the child charging docking assembly 44 is installed on the third connecting plate 30. Figure 28-34As shown, each support rod 24 is provided with a spring 25, one end of the spring 25 contacts the first connection plate 21, and the other end contacts the second connection plate 22. The mother charging docking assembly 2 is installed on the second connection plate 22. An insert guide assembly is provided on the side of the second connection plate 22 that is away from the center of the frame 1 in the lateral direction, and on the side of the third connection plate 30 that is close to the center of the frame 1 in the lateral direction. Figure 28-34 As shown, the plug-in guide assembly includes two main guide rods 6 and main guide sleeves 61 of the same number as the main guide rods 6; each electric vehicle tray 4 is connected to the sub-charging docking assembly 44 through a third connecting vertical plate 30, which is close to the central side of the frame body 1 in the transverse direction. When the sub-charging docking assembly 44 is docked with a mother charging docking assembly 2, each main guide rod 6 is inserted into a main guide sleeve 61. Specifically, two guide rods 6 are transversely arranged on the side of the second connecting vertical plate 22 that is away from the center of the frame body 1 in the transverse direction, and main guide sleeves 61 are transversely arranged at corresponding positions on the side of each third connecting vertical plate 30 that is close to the center of the frame body 1 in the transverse direction. The diameter of the main guide rod 6 gradually decreases in the transverse direction away from the center of the frame body 1 to form a pointed head.

[0045] Insert-type precision guide components are provided laterally at corresponding positions on the side surface of each mother charging docking component 2 that is away from the center of the frame 1 and on the side surface of each sub-charging docking component 44 that is close to the center of the frame 1. Two precision guide rods 62 are provided laterally on the side surface of the mother charging docking component 2 that is away from the center of the frame 1, and precision guide holes 63 are provided laterally at corresponding positions on the side surface of each sub-charging docking component 44 that is close to the center of the frame 1. The diameter of the precision guide rod 62 gradually decreases in the direction away from the center of the frame 1 to form a pointed head. When the sub-charging docking component 44 is docked with a mother charging docking component 2, each precision guide rod 62 is inserted into a precision guide hole 63. A support rod mounting hole 23 is provided at each of the four corners of the first connecting vertical plate 21.

[0046] A first spring positioning groove 27 is coaxially provided on the outer side of each support rod installation through hole on the side of the first connecting vertical plate 21 close to the second connecting vertical plate 22, and a first spring positioning groove 28 is coaxially provided on the outer side of each support rod on the side of the second connecting vertical plate 22 close to the first connecting vertical plate 21. The two ends of each spring are respectively inserted into the first spring positioning groove 27 and the first spring positioning groove 28 closest to it. When vibration occurs, when the second connecting vertical plate moves slightly along the normal direction perpendicular to the second connecting vertical plate and away from the center of the side of the first connecting vertical plate, the spring gives the second connecting vertical plate a centripetal force to return to the initial position, automatically adjusting the second connecting vertical plate back to the initial position, and the position is conducive to centering.

[0047] A support rod 21 is inserted into each support rod mounting hole 23, and a movable gap is provided between the portion of each support rod inserted into the support rod mounting hole 23 and the support rod mounting hole 23. The diameter of the portion of each support rod 24 inserted into the support rod mounting hole 23 is smaller than the diameter of the remaining portion of the support rod 24, so that a step 210 is formed on the support rod 24. The end of the support rod 24 away from the second connecting vertical plate 22 is provided with a side blocking body 29, and the distance between the side blocking body 29 and the step 210 is greater than the thickness of the first connecting vertical plate. A gasket 291 is sleeved between the side blocking body 29 and the first connecting vertical plate 21 on the support rod. The provision of the gasket 291 can increase the force-bearing area. There is a movable gap between the part of each support rod inserted into the support rod installation through hole and the support rod installation through hole, so that the second connecting plate is equivalent to a cantilever structure installed on the first connecting plate that can move slightly along the normal direction perpendicular to the second connecting plate and away from the center of the side of the first connecting plate; each support rod is equipped with a spring, and when vibration occurs, the second connecting plate can move slightly. When each plug-in main connecting guide device is docked, the spring presses the second connecting plate tightly, and even if the second connecting plate and the third connecting plate are slightly misaligned, the charging docking components on the second connecting plate and the third connecting plate can be closely docked. The end of each support rod away from the second connecting plate can be hinged on the support rod installation through hole. As long as the difference between the diameter of the support rod and the diameter of the support rod installation through hole is constant, the distance between the step and the side blocking body or the distance between the side blocking body and the middle blocking body is constant, the maximum movable angle between the support rod and the center axis of the support rod installation through hole is also a constant value. The side blocking body 29 is threadedly connected to the support rod 24 for easy position adjustment.

[0048] Each mother charging docking assembly 2 is provided with thirteen contacts, and each sub-charging docking assembly 44 is provided with contacts corresponding to the contacts on the mother charging docking assembly 2. When the mother charging docking assembly 2 is docked with the sub-charging docking assembly 44, the contacts on each mother charging docking assembly 2 are in contact with the sub-charging docking assembly 44 and its corresponding contacts. The contact is one of a plug rod and a socket. The contact includes a charging contact 64, and each mother charging docking assembly 2 and sub-charging docking assembly 44 is provided with three charging contacts 64, of which one is a DC power supply positive contact, one is a DC power supply negative contact, and one is a ground wire contact; when the mother charging docking assembly 2 is docked with the sub-charging docking assembly 44, two DC power supply positive contacts, two DC power supply negative contacts, and a vehicle ground wire contact are in contact. The contacts include ten charging auxiliary contacts 65, which are: six communication contacts, two charging connection contacts, and two low-voltage auxiliary power contacts. This technical solution is used to facilitate the control system to obtain battery charging information and control the charging process. The electric vehicle stereo charging station includes a control system, which is connected to the charging pile, the mother charging docking assembly 2, the lifting mechanism, and the tray lateral movement drive device. A lateral walking wheel group is installed at the front and rear ends of the bottom surface of the electric vehicle tray 4, respectively, and the lateral walking wheel group includes two lateral walking wheels 41; a lateral rack 42 is installed between the two lateral walking wheel groups on the bottom surface of the electric vehicle tray 4, and a plurality of teeth are provided on the rear side of the lateral rack 42. A charging position tray frame is provided below the charging position 12, and the charging position tray frame includes a longitudinal side beam 13 arranged at the bottom end of the charging position 12 and laterally away from the centroid end of the frame body, and the front end of the top surface of the longitudinal side beam 13 is laterally connected to the first charging position transverse tray frame moving rail 14, and the rear end of the top surface of the longitudinal side beam 13 is laterally connected to the second charging position transverse tray frame moving rail 15.

[0049] When all the electric vehicle trays 4 are located at the charging position 12, the transverse running wheels 41 at the front end of the electric vehicle tray 4 are located on the first charging position transverse tray rack moving rail 14, and the transverse running wheels 41 at the rear end of the electric vehicle tray 4 are located on the second charging position transverse tray rack moving rail 15, and each sub-charging docking assembly 44 on the electric vehicle tray 4 is docked with the mother charging docking assembly 2 closest to it. The tray transverse movement drive device includes a guide frame 31 that can move transversely and is arranged on the lifting platform 3. The guide frame 31 is provided with a guide frame drive motor 32 and a gear drive motor 33. The lifting platform tray rack moving guide rail includes a first charging position transverse tray rack moving rail 34 and a second charging position transverse tray rack moving rail 35. The front side of the guide frame 31 on the lifting platform 3 is provided with a first charging position transverse tray rack moving rail 34, and the rear side of the guide frame 31 on the lifting platform 3 is provided with a second charging position transverse tray rack moving rail 35; a plurality of gears 36 arranged perpendicular to the central axis are arranged transversely at the top of the guide frame 31. As shown Fig.10As shown, the gear 36 closest to the frame is connected to the driving wheel 331 of the gear drive motor 33 through a transmission chain 361. When the electric vehicle tray 4 is located on the lifting platform 3, the transverse running wheel 41 at the front end of the electric vehicle tray 4 is located on the first charging position transverse tray frame moving rail 34, and the transverse running wheel 41 at the rear end of the electric vehicle tray 4 is on the second charging position transverse tray frame moving rail 35.

[0050] When the lifting mechanism controls the lifting platform tray frame moving guide rail on the lifting platform 3 to align with the charging position horizontal tray frame moving guide rail of the frame body 1 close to the charging position 12 on the side of the lifting platform 3, the first charging position horizontal tray frame moving rail 34 is aligned with the first charging position horizontal tray frame moving rail 14, the second charging position horizontal tray frame moving rail 35 is aligned with the second charging position horizontal tray frame moving rail 15, and each gear 36 is aligned with the toothed surface of the horizontal rack 42 on the electric vehicle tray 4. Figure 9-10 As shown, the leading frame driving motor 32 is arranged at the bottom of the leading frame 31, and the leading frame driving motor 32 is connected to the driven wheel 317 arranged at the bottom of the leading frame 31 through the frame driving chain 316, and the frame driving chain 316 is connected to the leading frame 31. The lifting platform 3 includes two longitudinal beams 38, and two mutually parallel transport frame guide rails 37 are transversely arranged between the two longitudinal beams 38. The top and bottom ends of each transport frame guide rail 37 are connected with a pressure wheel 39 protruding toward the direction of the other transport frame guide rail 37 arranged longitudinally along the central axis. The pressure wheel 39 at the top end of each transport frame guide rail 37 contacts the top surface of the leading frame 31, and the pressure wheel 39 at the bottom end of each transport frame guide rail 37 contacts the bottom surface of the leading frame 31. Two drive chain support wheels 317 and a leading frame drive motor 32 are longitudinally arranged at the bottom end of the transport frame guide rail 37. The two drive chain support wheels 317 are connected to the drive chain 316, and one of the drive chain support wheels is connected to the leading frame drive motor 32. A plurality of gear mounting plates 310 are longitudinally arranged on the leading frame 31, and a gear 36 is mounted on each gear mounting plate 310. The gear drive motor 33 is arranged at the bottom end of the gear 36 closest to the frame body 1 at the bottom end of the leading frame 31, and is connected to the gear drive motor 33 through a transmission chain 361.

[0051] Each gear mounting plate 310 is vertically provided with a backrest wheel 311; when the lifting mechanism controls the lifting platform tray frame moving guide rail on the lifting platform 3 to align with the charging position horizontal tray frame moving guide rail of the frame body 1 near a charging position 12 on the side of the lifting platform 3, each backrest wheel 311 is aligned with the non-toothed surface of the transverse rack 42 on the electric vehicle tray 4. A plurality of guide bars 43 are horizontally provided on the bottom surface of the electric vehicle tray 4; the longitudinal side beam 13 is horizontally connected to the parking position transverse guide rod 16 with the same number of guide bars 43 near the center of the frame body; a plurality of first guide wheel groups are installed on each parking position transverse guide rod 16, each first guide wheel group includes two first guide wheels 17 symmetrically arranged front and back, and each first guide wheel 17 is vertically arranged; when the electric vehicle tray 4 is located at the charging position 12, the guide bar 43 on the bottom surface of the electric vehicle tray 4 in each charging position 12 is inserted between the two first guide wheels 17 of the first guide wheel group closest to it. The purpose of setting the guide bar 43 is to further prevent the electric vehicle tray 4 from shaking when entering and exiting the charging position 12.

[0052] Between the two longitudinal beams 38, a lifting platform transverse guide rod 312 having the same number as the guide strips 43 on the electric vehicle tray 4 is transversely arranged, and a plurality of second guide wheel 313 groups are installed on each lifting platform transverse guide rod 312, and each second guide wheel 313 group includes two second guide wheels 313 symmetrically arranged front and rear, and each second guide wheel 313 is arranged vertically; when the electric vehicle tray 4 is located on the lifting platform 3, the guide strip 43 on the bottom surface of the electric vehicle tray 4 is inserted between the two second guide wheels 313 of the second guide wheel 313 group closest to it. When the lifting mechanism controls the lifting platform tray rack moving guide rail on the lifting platform 3 to align with the charging position transverse tray rack moving guide rail of the frame body 1 close to a charging position 12 on the side of the lifting platform 3, the lifting platform transverse guide rod 312 is aligned with the parking space transverse guide rod 16 closest to it. Each longitudinal side beam 13 is provided with an electric vehicle tray limiting device. Figure 35-36As shown, the electric vehicle tray limiting device includes a rotating longitudinal rod 7; each rotating longitudinal rod 7 is connected to a longitudinal side beam 13 on the lateral side close to the centroid of the frame body 1 through a plurality of mounting bearings 72. Stop arms 71 perpendicular to the central axis are respectively provided at both ends of the rotating longitudinal rod 7; two active rotating arms 73 are provided in the middle of the rotating longitudinal rod 7, and the top surfaces of each stop arm 71 and the active rotating arm 73 are located above the top surface of the longitudinal side beam 13; a spring reset assembly is provided on the rotating longitudinal rod 7. When the lifting mechanism controls the lifting platform tray frame moving guide rail on the lifting platform 3 to align with the charging position horizontal tray frame moving guide rail of the frame body 1 close to a charging position 12 on the side of the lifting platform 3, each stop arm 71 is aligned between the front side and the rear side of the leading frame 32. When the leading frame 31 enters the charging position 12 laterally from the lifting platform and contacts the active rotating arm 73 in the charging position 12, the rotating longitudinal rod 7 rotates so that each stop arm 71 is located below the top surface of the longitudinal side beam 13 in the charging position 12; after the storage and retrieval of the car is completed, the leading frame 31 enters the lifting platform 3, the leading frame 31 does not contact the active rotating arm 73 in the charging position 12, and each stop arm 71 is reset.

[0053] When charging, the vehicle enters the electric vehicle tray on the leading frame 31 of the lifting platform 3. The lifting mechanism controls the lifting platform 3 to rise and fall and align with a charging position 12 on the side of the frame 1 close to the lifting platform 3. The leading frame 31 on the lifting platform 3 enters a charging position 12 on the side of the frame 1 close to the lifting platform 3. Figure 24-27 As shown, the leading frame 31 contacts the stop arm 71 in the charging position 12. The leading frame 31 is rotated so that each stop arm 71 is located below the top surface of the longitudinal side beam 13 in the charging position 12, so that the electric vehicle tray can enter the charging position 12 conveniently; the gear and gear 36 on the leading frame 31 rotate counterclockwise to push the transverse rack 42 on the bottom surface of the electric vehicle tray 4 into the charging position 12; when the leading frame 31 completely delivers the electric vehicle tray into the charging position 12 and the leading frame 31 returns to the lifting platform 3. Under the action of the spring return assembly, each stop arm 71 contacts the side of the electric vehicle tray that is laterally away from the center of the frame to lock the electric vehicle tray in the charging position 12. Preferably, the side of the electric vehicle tray that is laterally away from the center of the frame is provided with a chamfer to facilitate the stop arm 71 to abut. After charging is completed, the leading frame 31 on the lifting platform 3 enters a charging position 12 on the side of the frame 1 close to the lifting platform 3, and the leading frame 31 contacts the stop arm 71 in the charging position 12, so that it rotates and each stop arm 71 is located below the top surface of the longitudinal side beam 13 in the charging position 12, and the gear on the leading frame 31 contacts the transverse rack 42 on the bottom surface of the electric vehicle tray 4. As the gear rotates clockwise, the electric vehicle tray is moved out of the charging position 12 and returns to the lifting platform 3; the lifting mechanism controls the lifting platform 3 to descend to the ground, and the vehicle drives out from the electric vehicle tray on the leading frame 31 of the lifting platform 3.

[0054] A torsion spring 74 is provided on the mounting bearing 72. The torsion spring 74 has the function of controlling the stop arm 71 to reset. A rolling wheel 76 is longitudinally provided at the top of each stop arm 71 or active rotating arm 73. A guide platform 314 is provided between the front end and the rear end of the two longitudinal beams 38. When the electric vehicle tray 4 is located on the lifting platform 3, the top surfaces of the two guide platforms 314 are aligned with the top surface of the electric vehicle tray 4. The lifting mechanism includes a lifting motor 5 located at the left and right ends of the top of the frame 1. Each lifting platform 3 is connected to the lifting motor 5 closest to it through a lifting chain 51, and the lifting motor 5 is externally connected to a power supply. Specifically, a longitudinal lifting shaft 52 is provided at the left and right ends of the top of the frame 1, and each longitudinal lifting shaft 52 is connected to the lifting motor 5 closest to it. A lifting wheel 53 is provided at the front and rear ends of each longitudinal lifting shaft 52, and the lifting wheel 53 at the front end of each lifting wheel 53 and the front end of the lifting platform 3 closest to it, and the lifting wheel 53 at the rear end of each lifting wheel 53 and the rear end of the lifting platform 3 closest to it are connected by a lifting chain 51.

[0055] Two fixed pulleys 54 are provided on the side of each lifting wheel 53 near the center of the frame 1 in the horizontal direction at the top of the frame body, and two parallel counterweight guide rails 55 are provided vertically below the fixed pulley 54 farthest from the lifting wheel 53 among the fixed pulleys 54 on the frame body 1, and counterweights 56 are run on the two counterweight guide rails 55, and the lifting chain 51 is connected to each fixed pulley 54 and counterweight 56. The front and rear ends of the left end of the frame body 1 and the front and rear ends of the right end of the frame body 1 are vertically provided with columns 18, and each column 18 is provided with a vertical guide rail 19, and the front and rear ends of each lifting platform 3 are provided with guide wheels 315 that can clamp the vertical guide rail 19 closest to it to the left and right. An anti-falling device 8 that can slide on the vertical guide rail 19 is installed on each vertical guide rail 19. The anti-falling device 8 is an electromagnetic brake. A ladder 81 is vertically provided at the front or rear end of the frame body 1. A support rod is hinged on the support rod mounting hole, so that the second connecting vertical plate is equivalent to a cantilever structure installed on the first connecting vertical plate and can move slightly along the normal direction perpendicular to the second connecting vertical plate and away from the center of the side surface of the first connecting vertical plate; each support rod is equipped with a spring, and when vibration occurs, the second connecting vertical plate can move slightly. When each plug-in main connecting guide device is docked, the spring presses the second connecting vertical plate tightly, and even if the second connecting vertical plate and the third connecting vertical plate are slightly misaligned, the mother charging docking assembly 2 and the sub-charging docking assembly 44 on the second connecting vertical plate and the third connecting vertical plate can be tightly docked.

[0056] During operation, the lifting platform is lifted by the lifting mechanism and aligned with a charging position 12 provided with a vehicle carrier, the tray transverse motion driving device moves the vehicle carrier of the charging position 12 onto the lifting platform, and then the lifting platform 3 is lowered to the ground by the lifting mechanism; the electric vehicle to be charged is driven onto the electric vehicle tray 4 on the lifting platform, the charging gun is inserted into the charging position of the electric vehicle, and the driver leaves the lifting platform; the lifting platform is lifted by the lifting mechanism and aligned with an empty charging position 12, the tray transverse motion driving device controls the electric vehicle tray 4 on the lifting platform to enter the charging position 12 and dock the sub-charging docking assembly 44 with the sub-charging docking assembly 44 in the target charging position 12; then, the charging stack supplies power, and the charging gun starts to charge the electric vehicle; after the charging is completed, the lifting platform is lifted by the lifting mechanism and aligned with the charging position where the charging is completed, the tray transverse motion driving device controls the electric vehicle tray 4 on the target charging position to enter the lifting platform, and the lifting mechanism lowers the lifting platform to the ground; the driver pulls out the charging gun from the charging position of the electric vehicle, and the driver drives away from the lifting platform.

[0057] Example 2. Figure 40-41 As shown, the difference between this embodiment and embodiment 1 is that each rotating longitudinal rod is connected to a longitudinal side beam on the lateral side close to the centroid of the frame body through a plurality of mounting bearings. An active rotating arm 73 is connected to the longitudinal side beam 13 through a tension spring 75.

[0058] Example 3. Figure 42-43 As shown, the difference between this embodiment and embodiment 1 is that each rotating longitudinal rod is connected to a longitudinal side beam on a lateral side close to the centroid of the frame body through a plurality of mounting bearings. A stop arm 71 is connected to the longitudinal side beam 13 through a tension spring 75.

[0059] Example 4. Fig.44 As shown, the difference between this embodiment and embodiment 1 lies in that: a plurality of main guide rods 6 are laterally provided on the side surface of the second connecting vertical plate 22 away from the center of the frame body 1, and a main guide sleeve 61 is laterally provided at the corresponding position on the side surface of each third connecting vertical plate 30 close to the center of the frame body 1, and a bell mouth is provided on the main guide sleeve 61 close to the center end of the frame body 1.

[0060] Example 5. Figures 45-46As shown, the difference between this embodiment and the first embodiment is that: the end of the support rod 24 away from the second connection plate 22 is provided with a side blocking body 29, and the side of the first connection plate 21 on the support rod 24 close to the second connection plate 22 is provided with a middle blocking body 26, and the distance between the side blocking body 29 and the middle blocking body 26 is greater than the thickness of the first connection plate. A plurality of main guide sleeves 61 are provided laterally on the side of the second connection plate 22 away from the center of the frame 1, and a main guide plug 6 is provided laterally at the corresponding position on the side of each third connection plate 30 close to the center of the frame 1, and the diameter of the main guide plug 6 gradually decreases laterally along the direction close to the center of the frame 1 to form a pointed head. A plurality of precision main guide sockets are provided laterally on the side of the mother charging docking assembly 2 away from the center of the frame 1, and a precision guide plug 62 is provided laterally at the corresponding position on the side of each sub-charging docking assembly 44 close to the center of the frame 1, and the diameter of the precision guide plug 62 gradually decreases laterally along the direction close to the center of the frame 1 to form a pointed head.

[0061] Embodiment 6. The difference between this embodiment and embodiment 1 is that: a plurality of main guide sleeves 61 are transversely provided on the side surface of the second connecting vertical plate 22 away from the center of the frame body 1, and a main guide plug rod 6 is transversely provided at a corresponding position on the side surface of each third connecting vertical plate 30 close to the center of the frame body 1, and a bell mouth is provided on the end of the main guide sleeve 61 away from the center of the frame body 1.

Claims

1. A three-dimensional charging station for electric vehicles, characterized in that: include: A frame (1), the frame (1) being a frame structure, a plurality of charging layers (11) being arranged vertically on the frame (1), each charging layer (11) comprising two charging positions (12) that are symmetrical on both sides; a female charging docking assembly (2) is provided in each of the two charging positions (12) of each charging layer (11) on the frame (1), the female charging docking assembly (2) being installed between the two charging positions (12) on the frame; each female charging docking assembly (2) is externally connected to a charging stack; Two lifting platforms (3) are respectively arranged close to the left and right ends of the frame (1); each lifting platform (3) is connected to the frame (1) via a lifting mechanism and can move vertically; each lifting platform (3) is equipped with a tray lateral movement driving device; A plurality of electric vehicle trays (4), each electric vehicle tray (4) being located at a charging position (12) or on a lifting platform (3), each electric vehicle tray (4) being provided with a sub-charging connection assembly (44) on a side surface near the center of the frame (1) in a lateral direction; the sub-charging connection assembly (44) on each electric vehicle tray (4) being connected to at least one charging gun arranged on the electric vehicle tray (4) via a line; A charging position transverse tray frame moving guide rail is provided below each charging position (12), and a lifting platform tray frame moving guide rail is provided on each lifting platform (3); when the lifting mechanism controls the lifting platform tray frame moving guide rail on the lifting platform (3) to align with the charging position transverse tray frame moving guide rail of a charging position (12) on the frame body (1) close to the lifting platform (3), the tray transverse movement drive device can control the electric vehicle tray (4) on the lifting platform (3) to enter the charging position (12) and dock the sub-charging docking component (44) with a mother charging docking component (2), or control the electric vehicle tray (4) on the charging position (12) to enter the lifting platform (3).

2. The three-dimensional charging station for electric vehicles as claimed in claim 1, characterized in that: The mother charging docking assembly (2) is connected to the frame via a position self-adjusting device; the position self-adjusting device comprises a first connecting upright plate (21), a second connecting upright plate (22) located laterally away from the center of the frame (1) on the first connecting upright plate (21), and a third connecting upright plate (30) located on the electric vehicle tray (4); a plurality of support rod mounting holes (23) are laterally provided on the first connecting upright plate (21), a support rod (24) is hingedly connected to each support rod mounting hole (23), and an end of each support rod (24) laterally away from the center of the frame (1) is fixed to the second connecting upright plate (22); A spring (25) is sleeved on each support rod (24), one end of the spring (25) is in contact with the first connecting vertical plate (21), and the other end of the spring (25) is in contact with the second connecting vertical plate (22); A longitudinal middle beam (20) is provided between two charging positions (12) of each charging layer (11) on the frame (1), and each second connecting vertical plate (22) is connected to the longitudinal middle beam (20); the mother charging docking assembly (2) is mounted on the second connecting vertical plate (22); and the child charging docking assembly (44) is mounted on the third connecting vertical plate (30); An insertable guide assembly is provided on a side surface of the second connecting vertical plate (22) that is away from the center of the frame body (1) in the transverse direction, and on a side surface of the third connecting vertical plate (30) that is close to the center of the frame body (1) in the transverse direction.

3. The three-dimensional charging station for electric vehicles as claimed in claim 2, characterized in that: The plug-in guide assembly comprises a plurality of main guide rods (6) and main guide sleeves (61) of the same number as the main guide rods (6); when the sub-charging docking assembly (44) is docked with a mother charging docking assembly (2), each main guide rod (6) is inserted into a main guide sleeve (61); and a side surface of each electric vehicle tray (4) that is laterally close to the center of the frame (1) is connected to the sub-charging docking assembly (44) via a third connecting vertical plate (30); A plurality of main guide rods (6) are transversely arranged on the side surface of the second connecting vertical plate (22) away from the center of the frame body (1), and a main guide sleeve (61) is transversely arranged at a corresponding position on the side surface of each third connecting vertical plate (30) close to the center of the frame body (1). The diameter of the main guide rod (6) gradually decreases in the transverse direction away from the center of the frame body (1) to form a pointed tip. or, A plurality of main guide sleeves (61) are transversely arranged on the side surface of the second connecting vertical plate (22) away from the center of the frame body (1), and main guide plug rods (6) are transversely arranged at corresponding positions on the side surface of each third connecting vertical plate (30) close to the center of the frame body (1), wherein the diameter of the main guide plug rod (6) gradually decreases in the transverse direction toward the center of the frame body (1) to form a pointed tip. or, A plurality of main guide rods (6) are laterally arranged on the side surface of the second connecting vertical plate (22) away from the center of the frame (1), and a main guide sleeve (61) is laterally arranged at a corresponding position on the side surface of each third connecting vertical plate (30) closer to the center of the frame (1). The main guide sleeve (61) is laterally arranged at a trumpet mouth at the end closer to the center of the frame (1). or, A plurality of main guide sleeves (61) are laterally arranged on the side surface of the second connecting vertical plate (22) that is away from the center of the frame (1), and main guide plug rods (6) are laterally arranged at corresponding positions on the side surface of each third connecting vertical plate (30) that is close to the center of the frame (1), and a bell mouth is arranged at the end of the main guide sleeve (61) that is away from the center of the frame (1).

4. The three-dimensional charging station for electric vehicles as claimed in claim 2, characterized in that: Insertion-type precision guide components are disposed laterally at corresponding positions on the side surface of each mother charging docking component (2) that is away from the center of the frame (1) and on the side surface of each child charging docking component (44) that is close to the center of the frame (1); the insertion-type precision guide components include a plurality of precision guide plug rods (62) and a plurality of precision guide sockets (63); A plurality of precision guide plug rods (62) are laterally arranged on the side surface of the mother charging docking assembly (2) away from the center of the frame (1), and precision guide holes (63) are laterally arranged at corresponding positions on the side surface of each sub-charging docking assembly (44) near the center of the frame (1). The diameter of the precision guide plug rod (62) gradually decreases in the direction away from the center of the frame (1) to form a pointed tip. or, A plurality of precision guide sockets (63) are laterally arranged on the side surface of the mother charging docking assembly (2) that is away from the center of the frame (1), and precision guide plug rods (62) are laterally arranged at corresponding positions on the side surface of each sub-charging docking assembly (44) that is laterally close to the center of the frame (1), and the diameter of the precision guide plug rods (62) gradually decreases in the direction close to the center of the frame (1) to form a pointed tip; When the sub-charging docking assembly (44) is docked with a female charging docking assembly (2), each precision guide plug rod (62) is inserted into a precision guide plug hole (63).

5. The three-dimensional charging station for electric vehicles as claimed in claim 2, characterized in that: A first spring positioning groove (27) is coaxially provided on the outer side of each support rod mounting through hole on the side of the first connecting vertical plate (21) close to the second connecting vertical plate (22), and a first spring positioning groove (28) is coaxially provided on the outer side of each support rod on the side of the second connecting vertical plate (22) close to the first connecting vertical plate (21), and two ends of each spring are respectively inserted into the first spring positioning groove (27) closest to it and the first spring positioning groove (28) closest to it.

6. The three-dimensional charging station for electric vehicles as claimed in claim 2, characterized in that: A support rod (21) is inserted into each support rod mounting hole (23), and a movable gap is provided between the portion of each support rod inserted into the support rod mounting hole (23) and the support rod mounting hole (23); The diameter of the portion of each support rod (24) inserted into the support rod mounting hole (23) is smaller than the diameter of the remaining portion of the support rod (24), thereby forming a step (210) on the support rod (24); an end of the support rod (24) away from the second connecting vertical plate (22) is provided with an edge blocking body (29); the distance between the edge blocking body (29) and the step (210) is greater than the thickness of the first connecting vertical plate; or, The end of the support rod (24) away from the second connecting upright plate (22) is provided with a side blocking body (29), and the side of the first connecting upright plate (21) on the support rod (24) close to the second connecting upright plate (22) is provided with a middle blocking body (26), and the distance between the side blocking body (29) and the middle blocking body (26) is greater than the thickness of the first connecting upright plate.

7. The three-dimensional charging station for electric vehicles as claimed in claim 2, characterized in that: Each mother charging docking assembly (2) is provided with a plurality of charging contacts (64) and a plurality of charging auxiliary contacts (65); each child charging docking assembly (44) is provided with a charging contact (64) and a charging auxiliary contact (65) respectively corresponding to each charging contact (64) and charging auxiliary contact (65) on the mother charging docking assembly (2); the charging auxiliary contact (65) is one or more of a communication contact, a charging connection contact, and a low-voltage auxiliary power supply contact.

8. The three-dimensional electric vehicle charging station according to claim 1, characterized in that: The electric vehicle three-dimensional charging station comprises a control system, which is respectively connected to a charging pile, a mother charging docking assembly (2), a lifting mechanism, and a tray lateral movement driving device.

9. The three-dimensional charging station for electric vehicles as claimed in claim 1, characterized in that: A transverse running wheel set is respectively installed at the front and rear ends of the bottom surface of the electric vehicle tray (4), and the transverse running wheel set includes a plurality of transverse running wheels (41); a transverse rack (42) is installed between the two transverse running wheel sets on the bottom surface of the electric vehicle tray (4), and a plurality of teeth are provided on the front side surface or the rear side surface of the transverse rack (42).

10. The three-dimensional charging station for electric vehicles as claimed in claim 9, characterized in that: A longitudinal side beam (13) is provided below the end of each charging position (12) that is laterally away from the centroid of the frame body, the charging position transverse tray frame moving guide rail comprises a first charging position transverse tray frame moving rail (14) and a second charging position transverse tray frame moving rail (15), the front end of the top surface of the longitudinal side beam (13) is laterally connected to the first charging position transverse tray frame moving rail (14), and the rear end of the top surface of the longitudinal side beam (13) is laterally connected to the second charging position transverse tray frame moving rail (15); When all of the electric vehicle trays (4) are located at the charging positions (12), the transverse running wheels (41) at the front end of the electric vehicle tray (4) are located on the first charging position transverse tray frame moving rails (14), and the transverse running wheels (41) at the rear end of the electric vehicle tray (4) are located on the second charging position transverse tray frame moving rails (15), and each sub-charging docking assembly (44) on the electric vehicle tray (4) docks with the mother charging docking assembly (2) closest thereto.

11. The three-dimensional charging station for electric vehicles as claimed in claim 9, characterized in that: The tray lateral movement driving device comprises a guide frame (31) arranged on the lifting platform (3) and capable of lateral movement, wherein the guide frame (31) is provided with a guide frame driving motor (32) and a gear driving motor (33); The lifting platform tray frame moving guide rails include a first charging position transverse tray frame moving rail (34) and a second charging position transverse tray frame moving rail (35); the first charging position transverse tray frame moving rail (34) is provided on the front side of the leading frame (31) on the lifting platform (3), and the second charging position transverse tray frame moving rail (35) is provided on the rear side of the leading frame (31) on the lifting platform (3); a plurality of gears (36) arranged vertically with their central axis are arranged at the top of the leading frame (31), and the gear (36) closest to the frame body is connected to the gear drive motor (33); When the electric vehicle tray (4) is located on the lifting platform (3), the transverse running wheel (41) at the front end of the electric vehicle tray (4) is located on the first charging position transverse tray frame moving rail (34), and the transverse running wheel (41) at the rear end of the electric vehicle tray (4) is located on the second charging position transverse tray frame moving rail (35); When the lifting mechanism controls the lifting platform tray frame moving guide rail on the lifting platform (3) to align with the charging position transverse tray frame moving guide rail of a charging position (12) on the frame body (1) close to the lifting platform (3), the first charging position transverse tray frame moving rail (34) is aligned with the first charging position transverse tray frame moving rail (14), the second charging position transverse tray frame moving rail (35) is aligned with the second charging position transverse tray frame moving rail (15), and each gear (36) is aligned with the toothed surface of the transverse rack (42) on the electric vehicle tray (4).

12. The three-dimensional charging station for electric vehicles as claimed in claim 11, characterized in that: The lifting platform (3) comprises two longitudinal beams (38), two transport frame guide rails (37) parallel to each other are arranged transversely between the two longitudinal beams (38), and the top and bottom ends of each transport frame guide rail (37) are connected with a pressure wheel (39) arranged longitudinally along the central axis and protruding in the direction of the other transport frame guide rail (37), the pressure wheel (39) at the top end of each transport frame guide rail (37) contacts the top surface of the leading frame (31), and the pressure wheel (39) at the bottom end of each transport frame guide rail (37) contacts the bottom surface of the leading frame (31).

13. The three-dimensional charging station for electric vehicles as claimed in claim 12, characterized in that: Two drive chain support wheels (316) and a leading frame drive motor (32) are longitudinally arranged at the bottom end of one of the transport frame guide rails (37); the two drive chain support wheels (316) are connected to the drive chain (317); and one of the drive chain support wheels (316) is connected to the leading frame drive motor (32).

14. The electric vehicle three-dimensional charging station according to claim 11, characterized in that: A plurality of gear mounting plates (310) are longitudinally arranged on the leading frame (31), and a gear (36) is mounted on each gear mounting plate (310).

15. The three-dimensional charging station for electric vehicles as claimed in claim 14, characterized in that: Each gear mounting plate (310) is vertically provided with a backrest wheel (311); when the lifting mechanism controls the lifting platform tray frame moving guide rail on the lifting platform (3) to align with the charging position transverse tray frame moving guide rail of the frame body (1) close to a charging position (12) on the side of the lifting platform (3), each backrest wheel (311) is aligned with the non-toothed surface of the transverse rack (42) on the electric vehicle tray (4).

16. The three-dimensional charging station for electric vehicles as claimed in claim 10, characterized in that: A plurality of guide strips (43) are arranged transversely on the bottom surface of the electric vehicle tray (4); The longitudinal side beam (13) is connected to a parking space transverse guide rod (16) having the same number as the guide strips (43) at a laterally position near the center of the frame; a plurality of first guide wheel groups are mounted on each parking space transverse guide rod (16); each first guide wheel group comprises two first guide wheels (17) symmetrically arranged front and rear, and each first guide wheel (17) is arranged vertically; when the electric vehicle tray (4) is located at the charging position (12), the guide strip (43) on the bottom surface of the electric vehicle tray (4) in each charging position (12) is inserted between the two first guide wheels (17) of the first guide wheel group closest to it; A lifting platform transverse guide rod (312) having the same number as the guide strips (43) on the electric vehicle tray (4) is disposed transversely between the two longitudinal beams (38); a plurality of second guide wheel (313) groups are mounted on each lifting platform transverse guide rod (312); each second guide wheel (313) group comprises two second guide wheels (313) disposed symmetrically front and rear; each second guide wheel (313) is disposed vertically; when the electric vehicle tray (4) is located on the lifting platform (3), the guide strip (43) on the bottom surface of the electric vehicle tray (4) is inserted between the two second guide wheels (313) of the second guide wheel (313) group closest to the electric vehicle tray (4); When the lifting mechanism controls the lifting platform tray rack moving guide rail on the lifting platform (3) to align with the charging position transverse tray rack moving guide rail of the frame body (1) close to a charging position (12) on the side of the lifting platform (3), the lifting platform transverse guide rod (312) is aligned with the parking space transverse guide rod (16) closest thereto.

17. The three-dimensional electric vehicle charging station according to claim 10, characterized in that: Each longitudinal side beam (13) is provided with an electric vehicle tray limiting device.

18. The three-dimensional electric vehicle charging station according to claim 17, characterized in that: The electric vehicle tray limiting device includes a rotating longitudinal rod (7); Each rotating longitudinal rod (7) is connected to the frame body through a plurality of mounting bearings (72) and is located on a lateral side of a longitudinal side beam (13) close to the centroid of the frame body (1); Stop arms (71) perpendicular to the central axis of the rotating longitudinal rod (7) are respectively provided at both ends; a plurality of active rotating arms (73) are provided on each rotating longitudinal rod (7), and the top surface of each stop arm (71) and the active rotating arm (73) is located above the top surface of the longitudinal side beam (13); a spring return assembly is provided on the rotating longitudinal rod (7); When the lifting mechanism controls the lifting platform tray rack moving guide rail on the lifting platform (3) to align with the charging position horizontal tray rack moving guide rail of the frame body (1) close to a charging position (12) on the side of the lifting platform (3), each stop arm (71) is aligned and located between the front side and the rear side of the leading frame (32).

19. The three-dimensional charging station for electric vehicles as claimed in claim 18, characterized in that: A torsion spring (74) is provided on the mounting bearing (72), or at least one stop arm (71) is connected to the longitudinal side beam (13) via a tension spring (75), or at least one active rotating arm (73) is connected to the longitudinal side beam (13) via a tension spring (75).

20. The three-dimensional electric vehicle charging station according to claim 1, characterized in that: The lifting mechanism comprises lifting motors (5) located at the left and right ends of the top of the frame (1); each lifting platform (3) is connected to the lifting motor (5) closest to it via a lifting chain (51); and the lifting motor (5) is externally connected to a power supply.

21. The three-dimensional electric vehicle charging station as claimed in claim 20, characterized in that: A longitudinal lifting shaft (52) is provided at the left and right ends of the top of the frame body (1), each longitudinal lifting shaft (52) is connected to the lifting motor (5) closest to it, and a lifting wheel (53) is provided at the front and rear ends of each longitudinal lifting shaft (52), and a lifting chain (51) is used to connect the lifting wheel (53) at the front end of each lifting wheel (53) and the front end of the lifting platform (3) closest to it, and the lifting wheel (53) at the rear end of each lifting wheel (53) and the rear end of the lifting platform (3) closest to it.

22. The three-dimensional charging station for electric vehicles as claimed in claim 21, characterized in that: A plurality of fixed pulleys (54) are provided on the side of each lifting wheel (53) at the top of the frame body near the center of the frame body (1) in the horizontal direction. Two mutually parallel counterweight guide rails (55) are vertically provided below the fixed pulley (54) farthest from the lifting wheel (53) among the fixed pulleys (54) on the frame body (1). A counterweight (56) runs on the two counterweight guide rails (55). The lifting chain (51) is connected to each fixed pulley (54) and the counterweight (56).

23. The electric vehicle three-dimensional charging station as claimed in claim 1, characterized in that: The front and rear ends of the left end of the frame body (1) and the front and rear ends of the right end of the frame body (1) are vertically provided with columns (18), each column (18) is provided with a vertical guide rail (19), and the front and rear ends of each lifting platform (3) are provided with guide wheels (315) that can clamp the vertical guide rail (19) closest to it to the left and right.

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