A rear cantilever type two-wheel electric car garage lifting device and parking method

Abstract

The present application belongs to the technical field of mechanical parking, and particularly relates to a rear cantilever type two-wheeled electric vehicle garage lifting device, which comprises a steel frame structure, a lifting driving assembly, at least one upper layer vehicle loading plate, a lower layer vehicle loading plate, a drag chain, an enclosure and a walking track; wherein the steel frame structure comprises a top beam and a pair of face-to-face installed channel steel tracks arranged on the rear side of the equipment in the vertical direction, forming a closed lifting guide channel; the inner wall surface of the channel steel track is a rolling contact surface of the lifting walking wheel, and the opening thereof faces the front, so that the vehicle loading plate is only constrained and guided by the rear track during the lifting process, and the front area is completely open, facilitating the user to push in or push out the two-wheeled electric vehicle. The structure of a single lifting point matched with four lifting walking wheels ensures that the vehicle loading plate maintains a horizontal posture during the whole lifting process, without inclination, shaking or jamming phenomenon; the steel wire rope tensioning assembly automatically adjusts the tension, avoiding slack slipping or over-tightening rupture, and ensuring long-term reliable operation.

Description

Technical Field

[0001] This invention belongs to the field of mechanical parking technology, specifically a rear cantilever type two-wheeled electric vehicle garage lifting device and parking method. Background Technology

[0002] With the acceleration of urbanization, two-wheeled electric vehicles have become widely used due to their convenience and economy. However, the resulting problems of parking difficulties and haphazard parking have become increasingly prominent. To alleviate the contradiction between urban space constraints and chaotic parking order, multi-level parking garages for two-wheeled electric vehicles have emerged. These garages expand space into the sky or underground to achieve multi-level parking, significantly increasing parking capacity per unit area. In multi-level parking garage systems, the lifting device, as the core actuator, directly determines the performance of the entire system through its structural form, operational efficiency, and safety.

[0003] Currently, most two-wheeled electric vehicle automated parking system lifting devices on the market use hydraulic drive, chain traction, or ball screw transmission methods. While hydraulic drive offers advantages such as smooth operation and high load-bearing capacity, it suffers from drawbacks including high maintenance costs, reduced efficiency in low-temperature environments, and slow lifting speeds. Chain traction is simple in structure, low in cost, and offers fast lifting speeds, but it is prone to noise over long-term use and requires periodic tensioning to prevent chain slippage. Ball screw transmission offers high positioning accuracy and high transmission efficiency, but its high manufacturing cost and limited load-bearing capacity make it unsuitable for heavy-load scenarios. Furthermore, existing lifting devices generally employ a dual-point or four-point lifting structure, coupled with two or four long guide rails for guidance. This design not only occupies a large space, but the multiple steel cables or chains are prone to uneven elongation during actual operation due to uneven stress, causing the vehicle platform to tilt and affecting operational stability and safety. Simultaneously, the long guide rail structure is usually located at the front or sides of the equipment, obstructing user access and reducing the user experience.

[0004] Therefore, a rear-cantilever type two-wheeled electric vehicle garage lifting device and parking method are proposed to address the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a rear-cantilevered two-wheeled electric vehicle garage lifting device and parking method, thereby solving the technical problems mentioned in the background art.

[0006] To address the above technical problems, the following technical solution is adopted: a rear cantilever type two-wheel electric vehicle garage lifting device, including a steel frame structure, a lifting drive component, at least one upper vehicle loading platform, a lower vehicle loading platform, a drag chain, a fence, and a travel track;

[0007] The steel frame structure includes a top crossbeam and a pair of face-to-face channel steel rails installed vertically at the rear of the equipment, forming a closed lifting guide channel; the inner wall of the channel steel rail is the rolling contact surface of the lifting wheels, and its opening faces forward, so that the vehicle platform is only constrained and guided by the rear rail during the lifting process, and the front area is completely open, making it convenient for users to push in or out two-wheeled electric vehicles.

[0008] The lifting drive assembly is mounted on the top crossbeam and includes a drive motor, a take-up drum, a fixed pulley block, a single steel wire rope, and a spring tensioning assembly. One end of the steel wire rope is fixedly connected to the outer circumference of the take-up drum, and the other end extends downward after passing through multiple fixed pulleys in the fixed pulley block, and passes through the movable pulley assembly on the upper vehicle platform, finally winding back to a fixed point on the top crossbeam or reconnecting to the take-up drum to form a closed traction circuit. The fixed pulley block consists of at least two fixed pulleys and is used to change the direction of the steel wire rope and cooperate with the movable pulley assembly to form a labor-saving pulley system.

[0009] The specific winding path of the closed traction circuit of the wire rope is as follows: one end of the wire rope is fixed at a preset fixed point A on the outer circumference of the take-up drum, and after winding clockwise for 3-5 turns, it is led out and successively passes around the fixed pulley one arranged along the length of the top crossbeam in the fixed pulley group, close to the side of the take-up drum, fixed pulley two, close to the side of the car platform, changes direction and extends vertically downward, passes through the groove of the movable pulley assembly of the first upper car platform, folds upward and passes around the fixed pulley three in the fixed pulley group, and then passes vertically downward again through the groove of the movable pulley assembly of the second upper car platform. Following this pattern, it passes around all the movable pulley assemblies of the upper car platforms, extends upward and passes around the fixed pulley four of the fixed pulley group, and finally winds back to the preset fixed point B on the outer circumference of the take-up drum, forming a closed loop structure. The fixed point A and the fixed point B are spaced 10-15cm apart along the axis of the take-up drum. When the number of vehicle platforms is N, and N≥1, the number of fixed pulleys in the fixed pulley group is 2N+1. The odd-numbered fixed pulleys are used to change the direction of the wire rope from the drum to the movable pulley, and the even-numbered fixed pulleys are used to change the direction of the wire rope from the movable pulley to the next movable pulley or the rewind drum. The center of the groove of all movable pulley assemblies is in the same vertical plane to ensure that the force direction of each section of the wire rope is parallel, and the tension borne by each section of the wire rope is equal to 1 / 2N of the total weight of all upper vehicle platforms, so as to achieve synchronous lifting.

[0010] The upper vehicle carrier includes a frame welded from rectangular tubing, a parking panel, a front wheel support plate assembly, four lifting wheels, and bottom rubber pads. The parking panel is laid horizontally on top of the frame to support two-wheeled electric vehicles. The front wheel support plate assembly is fixed to the front end of the parking panel and has a U-shaped groove to limit the front wheels of the electric vehicle, preventing the vehicle from shifting forward or backward or tipping over during lifting. The four lifting wheels are installed on both sides of the rear of the upper vehicle carrier frame, two on each side, with their rims embedded between the inner walls of the channel steel rails, rolling vertically along the rails to bear the entire weight of the vehicle carrier and provide guidance. There are six bottom rubber pads, evenly distributed on the bottom surface of the upper vehicle carrier, used to buffer impacts, isolate direct metal contact, and reduce operating noise when the upper vehicle carrier descends to the lower vehicle carrier.

[0011] The movable pulley assembly, serving as the sole lifting point for the upper vehicle platform, is installed at the rear center of the upper vehicle platform frame. Its structure includes a pulley body, a pulley shaft, an anti-slip rope device, and an internal bearing. The pulley body is a disc-shaped structure with grooves, capable of rotating freely around the pulley shaft. Both ends of the pulley shaft are fixed to the vehicle platform frame. The anti-slip rope device consists of baffles or arc-shaped covers on both sides of the pulley body to prevent the wire rope from slipping out of the grooves during operation. The internal bearing is installed between the pulley shaft and the pulley body to reduce frictional resistance during wire rope traction.

[0012] The lower vehicle platform is horizontally movable, and its bottom is equipped with a driving mechanism, including a driving motor, a chain drive system, and driving / driven wheels. The chain drive system includes a first sprocket, a first chain, a second sprocket, a third sprocket, a second chain, and a fourth sprocket. The first sprocket is an integrally formed transmission sprocket on the output shaft of the driving motor, and its model matches the first chain. The second and third sprockets are coaxially fixed double sprocket structures, both mounted on the axle of the left driving wheel. The second sprocket is located inside the axle, and the third sprocket is located outside the axle, away from the center of the vehicle platform. Both are connected to the axle by a flat key. The sprocket is locked in place by a nut; the fourth sprocket is fitted inside the axle of the right-side drive wheel, and is the same size as the third sprocket and at the same horizontal height; the power transmission path is: the output shaft of the drive motor to the first sprocket to the first chain to the second sprocket to the left drive wheel axle to the third sprocket to the second chain to the fourth sprocket to the right drive wheel axle, so as to realize the synchronous rotation of the two drive wheels; the driven wheel is a non-powered support wheel, which is installed on the bottom bracket at the front and rear ends of the lower vehicle platform through the bearing seat, and only passively rolls on the travel track with the drive of the drive wheel, and its axle is parallel to the drive wheel axle and at the same height;

[0013] The travel track is a square steel structure laid horizontally along the ground. Its upper surface is the rolling surface of the travel wheels, and both sides are provided with upward-extending anti-derailment edges to prevent the travel wheels from derailing during operation. The travel track surface is also provided with scrapers, which are elastic metal sheets or rubber strips, fixed to the bottom of the lower vehicle platform near the travel wheels. During the movement of the vehicle platform, scrapes off stones, fallen leaves or other foreign objects from the track surface to ensure that the contact surface between the travel wheels and the track is clean and to avoid running jammed.

[0014] When the upper vehicle platform descends to its lowest position, its bottom rubber pad directly supports the upper surface of the lower vehicle platform, forming a physical support relationship. When the lower vehicle platform has not completely moved laterally out of the travel track range, its upper surface occupies the descent path of the upper vehicle platform, preventing it from descending further. Only after the lower vehicle platform has completely moved out can the upper vehicle platform descend to ground height. This structure constitutes a mechanical interlock safety logic, which can prevent the upper vehicle platform from accidentally descending when there are people or obstacles below without relying on sensors or electrical control, fundamentally avoiding accidents of people being trapped.

[0015] One end of the drag chain is fixed to the top of the steel frame structure, and the other end is connected to the upper vehicle platform. It bends and extends as the vehicle platform rises and falls. The drag chain contains a power supply cable. One end of the cable is connected to an external power source, and the other end is connected to a power adapter on the vehicle platform, providing a charging interface for two-wheeled electric vehicles parked on the upper vehicle platform, realizing the function of charging when parked.

[0016] The enclosure is a plate-like structure surrounding the projection area of ​​the equipment, with a height of not less than 300mm. It is made of steel plate or engineering plastic and is used to prevent rainwater, mud or dust from splashing into the equipment, keep the lifting rails, wheels and electrical components clean, and extend the service life of the equipment.

[0017] Furthermore, the spring tensioning assembly includes a compression spring, a spring retaining sleeve, and a locking plate. One end of the spring retaining sleeve is fixedly connected to the top crossbeam, and the compression spring is housed inside. The locking plate is an L-shaped or U-shaped metal piece, with one end connected to the wire rope and the other end pressed against the end face of the compression spring. When the upper vehicle platform is on the ground, the wire rope is in a slack state, and the compression spring provides pre-tension, keeping the wire rope moderately tensioned to prevent slippage or tangling on the drum. When the upper vehicle platform rises to its top limit position, the drive motor continues to operate, and the winding drum slightly tightens the wire rope, causing the locking plate to further compress the spring. When the spring compression stroke reaches a set value, a limit switch or proximity switch installed in the spring retaining sleeve is triggered, sending a positioning signal. The control system cuts off the power to the drive motor, achieving automatic stop and position self-locking. The limit switch and proximity switch of the spring tensioning assembly are optional installation options, with the specific structure as follows:

[0018] Option 1: Limit switch, which is fixed to the upper inner wall of the spring retaining sleeve by a bracket. The trigger rod of the switch faces the plate, and the initial position of the trigger rod is equal to the distance between the upper surface of the plate and the set compression stroke. The upper surface of the plate is provided with a protruding stop block. When the compression spring is compressed to the set stroke, the stop block contacts and presses the trigger rod. The limit switch sends an electrical signal to the control system to realize the stop and braking.

[0019] Option 2: A proximity switch, specifically an inductive proximity switch, is fixed to the center of the top end face of the spring retaining sleeve via a threaded connection. The switch's sensing head faces the upper surface of the plate, with a sensing distance set to 5-8mm. A metal sensing plate is fixed to the upper surface of the plate. When the compression spring is compressed to the set stroke, the distance between the metal sensing plate and the proximity switch's sensing head is less than the sensing distance, triggering an electrical signal from the proximity switch. This causes the control system to cut off the power to the drive motor and activate the electromagnetic brake. In both options, the inner wall of the spring retaining sleeve has an axial guide groove, and the edge of the plate is embedded in the guide groove, ensuring that the plate moves only axially and preventing misalignment that could lead to trigger failure.

[0020] Specifically, the single steel wire rope can sequentially pass around multiple upper-level vehicle-carrying platforms' movable pulley assemblies, enabling the synchronous lifting and lowering of multiple vehicle-carrying platforms to be controlled by a single steel wire rope; each movable pulley assembly independently bears the lifting force of its corresponding vehicle-carrying platform, and the steel wire rope distributes its path among the movable pulleys through a top fixed pulley group; this structure avoids configuring a separate drive motor, drum, and control system for each vehicle-carrying platform, significantly reducing the number of electrical components and control complexity;

[0021] A single steel wire rope combined with a movable pulley structure is used to achieve single-point lifting: each upper-level vehicle platform is equipped with only one movable pulley assembly as the lifting point. After the steel wire rope passes around the movable pulley, it forms two load-bearing branches, so that the actual tension acting on the steel wire rope is half of the total weight of the vehicle platform. This structure eliminates the problem of uneven force caused by manufacturing tolerances, installation errors, or inconsistent steel wire rope elongation at multiple lifting points, and prevents the vehicle platform from tilting or twisting during the lifting process. At the same time, halving the traction force allows for a corresponding reduction in the rated power of the drive motor, reducing equipment costs and energy consumption.

[0022] A single steel wire rope can control multiple vehicle platforms in a coordinated manner: In a multi-story parking garage structure, a single steel wire rope sequentially passes around the moving pulley assembly of each upper-level vehicle platform and is rationally distributed through the top fixed pulley group; all vehicle platforms are driven by the same drive motor and winding drum to achieve synchronous lifting; this design eliminates the need for an independent lifting drive system for each level, greatly simplifies the mechanical structure and electrical wiring, and reduces manufacturing, installation and maintenance costs;

[0023] The guide rails are centrally arranged at the rear of the equipment, forming a rear cantilever layout: the channel steel rails are only set at the rear of the equipment, and there are no columns, guide rails or support structures obstructing the front of the vehicle platform; users can push or pull two-wheeled electric vehicles into or out of the vehicle platform from the front without any obstacles, the operating space is spacious, and the experience of storing and retrieving vehicles is significantly better than the traditional structure with guide rails at both the front and rear.

[0024] A mechanical interlock safety logic is formed between the upper and lower vehicle carrier platforms: the lowest stopping position of the upper vehicle carrier platform is limited by the upper surface of the lower vehicle carrier platform; when the lower vehicle carrier platform has not completely moved laterally out, it physically occupies the descent space of the upper vehicle carrier platform, preventing the upper vehicle carrier platform from descending; this interlock mechanism does not rely on electronic sensors, PLC programs or human operation confirmation, and is an inherently safe design implemented by a purely mechanical structure, effectively preventing personal injury accidents caused by control system failure or misoperation.

[0025] Preferably, a method for three-dimensional parking of two-wheeled electric vehicles includes the following steps:

[0026] Step 1, Vehicle Storage Preparation: Open the enclosure door, and the control system triggers the start of the walking drive mechanism of the lower vehicle platform. The chain drive system drives the active walking wheels on both sides to rotate synchronously, so that the lower vehicle platform moves laterally out of the walking track range until the ultrasonic sensor detects that the lower vehicle platform has arrived in place, and the walking motor stops.

[0027] Step 2, Lowering the vehicle platform: After the lower vehicle platform is in place, the control system unlocks the lifting authority of the upper vehicle platform, the drive motor reverses, the winding drum releases the wire rope, and the upper vehicle platform descends along the rear channel steel track under the action of gravity. The lifting wheels roll along the inner wall of the track until the bottom rubber pad supports the ground, and the drive motor stops.

[0028] Step 3, Vehicle Parking: The user pushes the two-wheeled electric vehicle from the front open area into the upper vehicle platform. The front wheels are inserted into the U-shaped slots of the front wheel support plate assembly. The infrared distance sensor detects the parking position of the vehicle. When the detection distance is within the set threshold range, the parking is deemed compliant.

[0029] Step 4, Car platform rises: The user closes the enclosure door, triggers the parking command, drives the motor to rotate forward, and the winding drum tightens the wire rope. Through the closed traction circuit of a single wire rope, in conjunction with the pulley assembly, the upper car platform rises along the channel steel track. The spring tensioning assembly adjusts the wire rope tension in real time.

[0030] Step 5, Position Locking: When the upper vehicle platform is raised to the preset height, the clamping plate of the spring tensioning assembly compresses the spring to the set stroke, triggering the limit switch and / or proximity switch to cut off the power to the drive motor and activate the electromagnetic brake, locking the upper vehicle platform in position.

[0031] Step 6, Lower layer reset: After the upper layer vehicle platform is locked, the travel drive mechanism starts in reverse, and the lower layer vehicle platform moves back to the initial position along the travel track to complete the vehicle storage;

[0032] Step 7, Vehicle Retrieval Operation: Trigger the vehicle retrieval command, repeat the lower vehicle platform removal action from Step 1, then reverse the drive motor to release the steel cable, the upper vehicle platform descends and supports the lower vehicle platform. After the user retrieves the vehicle, repeat the reset actions from Steps 4 and 6 to complete the vehicle retrieval.

[0033] The beneficial effects of this invention are:

[0034] In terms of structure, the lifting drive assembly only requires a drive motor, a take-up drum, a fixed pulley block and a single steel wire rope. The upper vehicle platform has only one movable pulley lifting point. The number of guide rails is reduced to a pair and concentrated on the rear side. The overall number of parts is significantly less than that of hydraulic cylinders, multi-chain or multi-screw solutions. Manufacturing and assembly are simple and maintenance workload is small.

[0035] In terms of operational stability, the single lifting point combined with the structure of four lifting wheels ensures that the vehicle platform maintains a horizontal posture throughout the lifting process, without tilting, swaying or jamming; the wire rope tensioning component automatically adjusts the tension to avoid slack slippage or excessive tightness breakage, ensuring long-term reliable operation;

[0036] In terms of space utilization, the fully open layout at the front makes the width of the equipment only slightly larger than that of a two-wheeled electric vehicle, making it suitable for high-density urban areas such as narrow alleys, stairwells, or community corners; the multi-level structure can achieve three to five vehicles in a limited area, increasing parking efficiency per unit area by more than 200%.

[0037] In terms of safety, the mechanical interlock mechanism ensures that the lower car platform must be removed before the upper car platform descends, thus eliminating the risk of people being trapped from a structural perspective; rubber pads buffer impacts, anti-slip rope devices prevent the wire rope from derailing, and scrapers remove foreign objects from the track, with multiple measures to improve the level of operational safety.

[0038] In terms of functionality, the cable chain has a built-in power supply cable that supports the integrated charging socket on the vehicle platform, meeting the user's need for charging as soon as the car is parked, and enhancing the intelligence and added value of the garage; the enclosure structure effectively isolates external environmental interference, keeps the internal structure clean and dry, and extends the service life of the equipment.

[0039] In summary, this invention addresses the core pain points of existing two-wheeled electric vehicle parking garage lifting devices in terms of cost, stability, spatial adaptability, and safety through structural innovations such as single wire rope pulley lifting, rear-side centralized guidance, single-point suspension layout, and mechanical interlocking support. It provides a lifting solution that is simple in structure, reliable in operation, inherently safe, and fully functional, making it suitable for large-scale deployment. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] In the attached diagram:

[0042] Figure 1 This is a schematic diagram of the overall structure of a rear cantilevered two-wheeled electric vehicle garage lifting device according to the present invention.

[0043] Figure 2 This is a schematic diagram of the steel frame structure of the present invention;

[0044] Figure 3 This is a schematic diagram of the lifting drive assembly of the present invention. Figure 1 ;

[0045] Figure 4 This is a schematic diagram of the lifting drive assembly of the present invention. Figure 2 ;

[0046] Figure 5 This is a cross-sectional structural diagram of the spring tensioning assembly of the present invention;

[0047] Figure 6 This is a three-dimensional structural diagram of the upper vehicle-mounted plate of the present invention;

[0048] Figure 7 This is a schematic diagram of the structure of the movable pulley assembly of the present invention;

[0049] Figure 8 This is a partial structural diagram of the upper vehicle-mounted plate of the present invention;

[0050] Figure 9 This is a schematic diagram of the structure of the lower vehicle-mounted plate of the present invention. Figure 1 ;

[0051] Figure 10 This is a schematic diagram of the structure of the lower vehicle-mounted plate of the present invention. Figure 2 ;

[0052] Figure 11 This is a partial structural diagram of the lower vehicle-mounted plate of the present invention. Figure 1 ;

[0053] Figure 12 This is a partial structural diagram of the lower vehicle-mounted plate of the present invention. Figure 2 ;

[0054] Figure 13 This is a flowchart of the three-dimensional parking method for two-wheeled electric vehicles according to the present invention.

[0055] Legend:

[0056] 101. Channel steel track; 121. Top crossbeam; 201. Drive motor; 202. Winding drum; 203. Fixed pulley block; 204. Steel wire rope; 205. Spring tensioning assembly; 2051. Compression spring; 2052. Spring retaining sleeve; 2053. Clamping plate; 3. Upper vehicle platform; 3011. Parking panel; 302. Front wheel support plate assembly; 321. Moving pulley assembly; 3211. Pulley body; 3212. 3213 Anti-jump rope device; 322 Lifting travel wheel; 323 Rubber pad; 4 Lower vehicle platform; 4101 Travel motor; 4102 First chain; 4103 Second sprocket; 4106 Drive travel wheel; 4016 Drive travel wheel on the other side; 4017 Third sprocket; 4018 Second chain; 4201, 4202 Scraper; 5 Cable chain; 6 Enclosure; 7 Travel track. Detailed Implementation

[0057] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0058] Specific implementation examples are given below.

[0059] like Figures 1-12 As shown, this device consists of a steel frame structure, a lifting drive assembly, an upper vehicle carrier plate 3, a lower vehicle carrier plate 4, a cable chain 5, a barrier 6, and a travel track 7. These components work together to achieve three-dimensional parking, intelligent charging, and safety protection for two-wheeled electric vehicles. The following details the structural details and assembly relationships of each component:

[0060] The steel frame structure serves as the load-bearing foundation of the entire device, including a top crossbeam 121 and a pair of channel steel rails 101 symmetrically arranged vertically at the rear of the equipment. The channel steel rails 101 are made of channel steel, installed face-to-face with their openings facing forward, forming an 80mm wide enclosed lifting guide channel. The inner wall of the rails is precision ground and then coated with a micro-nano-level self-lubricating coating (model: WS2), with a coating thickness of 5-8μm, which reduces the friction coefficient between the lifting wheels 322 and the rails to below 0.08. A removable dust collection trough (material: 304 stainless steel, length matching the rails, depth 50mm) is bolted to the bottom of the rails. A movable cover is provided on one side of the dust collection trough for regular cleaning of accumulated dust and debris. The top crossbeam 121 uses a 200×100mm rectangular tubing, welded at both ends to the top of the channel steel rails 101. The welds are reinforced with triangular ribs to ensure a load-bearing capacity of not less than 50kN.

[0061] The lifting drive assembly is installed in the middle of the top crossbeam 121. Its core components include a drive motor 201, a winding drum 202, a fixed pulley block 203, a single steel wire rope 204, and a spring tensioning assembly 205. The specific assembly relationship is as follows:

[0062] The drive motor 201 is a three-phase asynchronous motor of model YE2-100L1-4 with a rated power of 1.5kW and a speed of 1440r / min. It is fixed to the top crossbeam 121 by a motor mount. The motor output shaft is connected to the take-up drum 202 by a flexible coupling. The take-up drum 202 is made of seamless steel pipe with an outer diameter of 200mm and a length of 300mm. The outer circumference is provided with a spiral groove (groove width 12mm and groove depth 8mm) for orderly winding of the steel wire rope 204.

[0063] The fixed pulley block 203 consists of 4 fixed pulleys (when 2 upper car carrier plates are configured), all of which are made of cast steel with a pulley diameter of 150mm. They are evenly arranged along the length of the top crossbeam 121 via a bracket: the distance between fixed pulley one (near the winding drum 202) and fixed pulley two (near the car carrier plate) is 50cm, the distance between fixed pulley three and fixed pulley four is 30cm, and the vertical height difference between fixed pulley three and four and fixed pulley two is 80cm.

[0064] The 204 steel wire rope is an 8mm diameter galvanized steel wire rope (breaking strength ≥40kN). The specific winding path of its closed traction circuit is as follows:

[0065] One end of the steel wire rope 204 is fixed at point A, which is 1 / 3 of the length on the left side of the take-up drum 202. After being wound clockwise 4 times, it is led out and horizontally passed over the fixed pulley 1 to the right.

[0066] After the fixed pulley changes direction to vertically downward, it passes through the wheel groove of the movable pulley assembly 321-1 (from left to right) of the upper vehicle plate 3-1 and then turns upward;

[0067] Extending upwards to fixed pulley three, the direction changes to vertical downwards via fixed pulley three, and passes through the wheel groove of movable pulley assembly 321-2 of upper vehicle plate 3-2 (from left to right).

[0068] After folding upwards and going around the fourth fixed pulley, the direction changes to horizontal to the left, and finally winds back to the fixed point B at the right 1 / 3 length of the winding drum 202, completing the closed loop (fixed points A and B are 12cm apart along the axis of the drum).

[0069] The spring tensioning assembly 205 is installed on the side of the top crossbeam 121 near the fixed pulley four, and includes a compression spring 2051, a spring retaining sleeve 2052, a retaining plate 2053, and a limit switch.

[0070] The spring retaining sleeve 2052 has a cylindrical structure (inner diameter 80mm, length 100mm), one end of which is fixed to the top crossbeam 121 by a flange, and the inside houses the compression spring 2051 (model: GB / T2089-2009, wire diameter 6mm, free length 80mm, stiffness coefficient 20N / mm).

[0071] The clamping plate 2053 is a circular metal plate (78mm in diameter and 10mm in thickness), with its edge embedded in the axial guide groove of the inner wall of the spring fixing sleeve 2052, and can only move axially; a cylindrical impact block (10mm in diameter and 5mm in height) is welded to the center of the upper surface of the clamping plate 2053, and the lower surface is pressed against the end face of the compression spring 2051. A wire rope 204 fixing hole (9mm in diameter) is provided on one side for connecting the end of the wire rope 204;

[0072] The limit switch is a micro switch of model LX19-001, which is fixed to the upper part of the inner wall of the spring retaining sleeve 2052 by an L-shaped bracket. The trigger rod extends vertically downward, and the initial position is 18mm away from the stop block of the clamping plate 2053 (i.e., the set compression stroke). At the same time, an inductive proximity switch of model SN04-N is fixed to the top end face of the spring retaining sleeve 2052 by an M8 thread. The sensing head extends 30mm into the sleeve and the sensing distance is set to 6mm, forming a double protection with the limit switch.

[0073] Operating logic: When the drive motor 201 rotates forward, the take-up drum 202 tightens the wire rope 204, which drives the upper vehicle platform 3 to rise through the pulley assembly 321. When the vehicle platform rises to the top limit position, the wire rope 204 tightens further, pushing the clamping plate 2053 to compress the spring 2051. When the spring compression reaches 18mm, the clamping plate 2053 blocks press the limit switch. At the same time, the proximity switch senses the metal sensing piece (material Q235 steel, thickness 3mm, diameter 20mm) on the clamping plate 2053. The dual signals are sent to the PLC control system (model: S7-200SMART). The control system cuts off the power to the drive motor 201 within 50ms and activates the electromagnetic braking device (installed at the end of the motor output shaft) to lock the take-up drum 201, achieving position self-locking.

[0074] The upper vehicle platform 3 adopts a frame structure welded from rectangular square tubes, with overall dimensions of 1800×600mm. The specific structure is as follows:

[0075] The parking panel 3011 is made of 3mm thick patterned steel plate, which is laid on the top of the frame and welded and fixed. The surface of the panel has anti-slip texture (raised height of 2mm) to prevent the vehicle from slipping when parked. The front wheel support plate assembly 302 is fixed to the front end of the parking panel 3011 and adopts a stamped U-shaped groove (groove width 120mm, depth 80mm). An elastic anti-slip pad layer (material: nitrile rubber, thickness 10mm) is pasted in the groove to limit the front wheel of the electric vehicle and prevent the vehicle from moving forward and backward during the lifting process.

[0076] Four lifting wheels 322 are installed on both sides of the rear of the vehicle platform frame (two on each side). They are made of nylon, with a wheel diameter of 80mm and a rim width of 30mm. The outer side of the rim is wrapped with a 5mm thick wear-resistant rubber layer. The wheel axle is equipped with a shock-absorbing bushing (material: polyurethane, Shore A70 hardness) at the connection between the wheel axle and the frame to absorb vibration and impact during the lifting process.

[0077] Six rubber pads 323 (material: natural rubber, Shore A60) are evenly distributed on the bottom of the vehicle platform. Each pad is 50×50×20mm in size and is located at the four corners and the middle of the vehicle platform. When the vehicle platform is lowered to the lowest position, the rubber pads 323 directly support the upper surface of the lower vehicle platform 4, buffering the impact while isolating metal contact and reducing operating noise.

[0078] Safety detection device: E3Z-LS63 infrared distance sensors are installed on the middle of both sides of the vehicle platform frame, facing the area above the vehicle platform. The detection range is 0-10cm, and the detection accuracy is ±0.5cm. The sensors are electrically connected to the control system. When the distance between the electric vehicle body and the edge of the vehicle platform is less than 5cm, a prohibition signal is sent to prevent the drive motor 201 from starting the lifting action. At the same time, the detection threshold of the sensors can be adjusted through the touch screen of the control system. The adjustment range is 3-8cm, which can adapt to two-wheeled electric vehicles of different sizes.

[0079] The movable pulley assembly 321 serves as the sole lifting point for the upper vehicle platform 3, and is installed at the center of the rear of the vehicle platform frame. Its specific structure includes:

[0080] The pulley body 3211 is a disc-shaped structure with a groove (material: cast steel, diameter 120mm, groove width 10mm), which can rotate freely around the pulley shaft 3213;

[0081] The pulley shaft 3213 is made of 45 steel with a diameter of 25mm. Both ends are fixed to the upright plate of the vehicle frame by nuts. Thrust washers are provided between the shaft and the upright plate.

[0082] The anti-slip rope device 3212 is an arc-shaped cover (material: ABS engineering plastic) set on both sides of the pulley body 3211. The distance between the cover and the pulley groove of the pulley body 3211 is 3mm, which can effectively prevent the wire rope 204 from coming out of the groove during operation.

[0083] Two deep groove ball bearings of model 6205 are installed between the pulley shaft 3213 and the pulley body 3211. The outer ring of the bearing is interference-fitted with the inner hole of the pulley body 3211, and the inner ring is transition-fitted with the pulley shaft 3213 to reduce the frictional resistance of the wire rope 204 during traction.

[0084] The lower vehicle platform 4 has the same overall dimensions as the upper vehicle platform (1800×600mm) and can move horizontally along the travel track 7. The specific structure is as follows:

[0085] The walking drive mechanism is installed at the bottom of the lower vehicle platform 4, including a walking motor 4101, a chain drive system, and driving / driven walking wheels:

[0086] The walking motor 4101 is a three-phase asynchronous motor with model YE2-80M1-4, rated power 0.75kW, speed 1440r / min, and is fixed to the rear side of the bottom of the vehicle platform by the motor mount;

[0087] The chain drive system consists of a first sprocket, a first chain 4102, a second sprocket 4103, a drive wheel 4016 on the other side, a third sprocket 4017, a second chain 4018, and a fourth sprocket. The first sprocket is a drive sprocket integrally formed with the motor output shaft (18 teeth, pitch circle diameter 50mm). The second sprocket 4103 (24 teeth, pitch circle diameter 65mm) and the third sprocket 4017 (24 teeth, pitch circle diameter 65mm) are coaxially fixed double sprocket structures, fitted onto the left drive wheel. On the axle of the traveling wheel 4106 (axle diameter 30mm), with a distance of 20mm between the two, it is connected to the axle by a flat key and locked by a nut; the fourth sprocket (24 teeth, pitch circle diameter 65mm) is fitted inside the axle of the other driving traveling wheel 4016, and is at the same horizontal height as the third sprocket 4017 (distance 600mm, consistent with the width of the vehicle platform); the first chain 4102 and the second chain 4018 are both roller chains of model 16A-1, and the sag during installation does not exceed 10mm.

[0088] The active walking wheel 4106 and the other active walking wheel 4016 are nylon wheels with a diameter of 120mm and a rim width of 40mm. The wheel axle is connected to the bottom bracket of the vehicle platform through a deep groove ball bearing. There are a total of 4 driven walking wheels, which are installed on the front and rear sides of the vehicle platform respectively. The wheel diameter is the same as that of the active walking wheel 4106. They are unpowered support wheels with a rolling resistance of less than 5N.

[0089] Safety detection device: US-100 ultrasonic sensors are installed at the front end and both sides of the lower vehicle platform 4, with a detection range of 2-400cm and a detection accuracy of ±1cm. The sensors are electrically connected to the control system of the walking motor 4101. When an obstacle is detected at a distance of ≤10cm from the front or side, the walking motor 4101 immediately stops and makes a reverse fine adjustment of 5cm to avoid collision. Scrapers 4201 and 4202 are fixed at the bottom of the vehicle platform near the active walking wheel. The scrapers are 2mm thick elastic stainless steel sheets with a length of 80mm. The contact pressure between the scrapers and the upper surface of the walking track is 5-8N. The scrapers are linked with a pressure sensor (model: LC618). When the resistance when scraping foreign objects from the track exceeds 20N (i.e., the pressure sensor detection value exceeds the standard), the buzzer alarm is triggered and the lateral movement is paused.

[0090] The travel track 7 is a square steel structure laid horizontally along the ground, made of 100×100mm hot-dip galvanized square steel, with the length set according to the usage scenario (usually 3000mm); the upper surface of the track is the rolling surface of the travel wheels, which is finely ground and has a flatness error ≤0.2mm / m; both sides of the track are welded with upward-extending anti-derailment guards (material: Q235 steel, height 30mm, thickness 5mm) to prevent the travel wheels from derailing during operation; limit blocks (material: rubber, size 50×50×50mm) are provided at both ends of the track to prevent the lower vehicle plate 4 from moving too much and hitting the ends of the track.

[0091] The cable chain 5 is an engineering plastic cable chain of model TL-18×37. One end is fixed to the top of the steel frame structure by a bracket, and the other end is connected to the side of the upper vehicle platform 3. The cable chain 5 can be freely bent and extended as the vehicle platform rises and falls, with a bending radius ≥150mm. The cable chain 5 contains two cables: one is a 3×2.5mm² power supply cable, and the other is a signal transmission cable that integrates a 485 communication cable and a power cable. One end of the power supply cable is connected to an external 220V AC power source, and the other end is connected to the intelligent charging module on the upper vehicle platform (installed in a waterproof box on the side of the vehicle platform). The intelligent charging module supports fast charging and slow charging mode switching (fast charging output current 10A, slow charging output current 2A), and the output voltage can automatically adapt to 12V-72V two-wheeled electric vehicles. It has current overload protection (protection threshold 15A), automatic power-off when fully charged (power-off when the detected current ≤0.3A), and communication feedback function. It can feed back the charging status (not charging / charging / fully charged) to the main controller of the equipment in real time through the signal transmission line.

[0092] Enclosure 6 is a plate-like structure surrounding the projection area of ​​the equipment, 350mm high, made of 1.5mm thick cold-rolled steel plate (or ABS engineering plastic), with an 8mm thick buffer rubber strip (material: EVA) pasted on the inside to prevent personnel from being injured by collision; Enclosure 6 is fixed to the ground with expansion bolts, with a distance of 100mm between it and the main body of the equipment, to facilitate heat dissipation and maintenance of the equipment; Enclosure 6 has a movable door (800mm wide) at the front, with a limit switch installed on the door, so that the equipment can only start lifting or lateral movement when the movable door is closed, further improving the level of safety protection.

[0093] Mechanical interlock: The lowest stopping position of the upper vehicle platform 3 is limited by the upper surface of the lower vehicle platform 4. When the lower vehicle platform 4 has not completely moved laterally out of the range of the travel track 7, it physically occupies the descent space of the upper vehicle platform, preventing the upper vehicle platform from continuing to descend. Only after the lower vehicle platform 4 has completely moved out of the track (the position signal is detected by the limit switch) will the control system allow the upper vehicle platform to descend to the ground height. This interlock mechanism does not rely on electronic sensors and is an intrinsically safe design implemented by a purely mechanical structure.

[0094] In one example, the parking preparation phase:

[0095] The user manually opens the movable door at the front of the enclosure, triggering a limit switch on the door and sending a door opening signal to the PLC control system. The control system immediately sends a start command to the travel motor 4101. The output shaft of the travel motor 4101 drives the first sprocket to rotate, which is transmitted through the first chain 4102 to the second sprocket 4103, thereby driving the left active travel wheel axle 4106 to rotate. Simultaneously, the third sprocket 4017, coaxially fixed with the second sprocket 4103, drives the fourth sprocket to rotate through the second chain 4018, causing the right active travel wheel axle to rotate synchronously, and the lower vehicle platform 4 moves out at a constant speed along the travel track 7. The ultrasonic sensor at the front of the lower vehicle platform 4 detects obstacles in real time. When the sensor detects an obstacle 5cm from the end limit block of the track, it sends a positioning signal, and the control system cuts off the power to the travel motor 4101, stopping the lower vehicle platform 4 from moving. At this point, the lower vehicle platform 4 is completely separated from the descent path of the upper vehicle platform 3.

[0096] Vehicle platform descent stage:

[0097] After receiving the arrival signal from the lower platform 4, the control system automatically unlocks the lifting authority of the upper platform 3. The drive motor 201 starts in reverse mode, and the winding drum 202 slowly releases the wire rope 204. Under the combined weight of its own body and the vehicle (if preloaded), the upper platform 3 descends along the channel steel track 101. During the descent, the four lifting wheels 322 roll along the micro-nano-level self-lubricating coating on the inner wall of the channel steel track 101, and the shock-absorbing bushings at the wheel axles absorb vibration and impact, ensuring a smooth descent. When the six rubber pads 323 at the bottom of the upper platform 3 fully contact the ground, the platform stops descending. The control system senses the load change of the drive motor 201 through the current detection module, cuts off the motor power, and completes the descent.

[0098] Vehicle parking stage:

[0099] The user pushes the two-wheeled electric vehicle from the unobstructed area at the front onto the upper vehicle platform 3, causing the front wheel of the electric vehicle to engage in the U-shaped slot of the front wheel support assembly 302. The elastic anti-slip pad layer inside the slot tightly adheres to the tire, preventing the vehicle from shifting forward or backward. Infrared distance sensors on both sides of the upper vehicle platform 3 continuously monitor the distance between the vehicle body and the edge of the platform. If the user-set detection threshold is 5cm, when the sensor detects that the distance between the vehicle body and the edge of the platform is ≥5cm, it sends a parking compliance signal to the control system. If the detection distance is <5cm, the control system triggers a buzzer alarm, prompting the user to adjust the vehicle position until the detection is compliant.

[0100] The lifting stage of the vehicle platform:

[0101] When the user closes the enclosure gate, the gate's travel switch resets, sending a gate-closed signal to the control system. The user then presses the parking button on the control panel, activating the drive motor 201 to rotate forward. The winding drum 202 winds the wire rope 204 clockwise. The wire rope 204, through a closed traction circuit, sequentially pulls the pulley assemblies 321 of each upper-level vehicle platform 3, causing the upper-level vehicle platform 3 to rise along the channel steel track 101. During the ascent, the compression spring 2051 of the spring tensioning assembly 205 consistently provides preload, automatically adjusting the tension of the wire rope 204 to prevent slippage. When the wire rope 204 experiences slight stretching, the compression spring 2051 compensates for the elongation through the clamping plate 2053, ensuring stable tension.

[0102] Position locking phase:

[0103] When the upper vehicle platform 3 rises to the preset height (e.g., 2.5m), the wire rope 204 tightens further, pushing the clamping plate 2053 upward along the axial guide groove of the spring fixing sleeve 2052, compressing the spring 2051. When the spring compression stroke reaches 18mm, the stop block on the clamping plate 2053 presses the limit switch, and at the same time, the metal sensing piece on the clamping plate 2053 enters the sensing range of the proximity switch (≤6mm). The two signals are transmitted to the control system synchronously. Within 50ms, the control system cuts off the power to the drive motor 201 and simultaneously activates the electromagnetic braking device at the end of the motor output shaft, locking the winding drum 202. The upper vehicle platform 3 is stably locked at the preset height. At this time, the wire rope 204 is evenly stressed, and the tension borne by each section of the wire rope is 1 / 2N of the total weight of the upper vehicle platform (N is the number of upper vehicle platforms).

[0104] Lower layer reset phase:

[0105] After the upper vehicle carrier plate 3 is locked, the control system sends a reverse start command to the walking motor 4101. The lower vehicle carrier plate 4 moves in the opposite direction along the walking track 7 until the ultrasonic sensor detects that the distance from the initial position limit block is 5cm. At this point, the walking motor 4101 stops, the lower vehicle carrier plate 4 is reset to the equipment projection area, and the vehicle storage process is completed.

[0106] Vehicle retrieval operation stage:

[0107] The user presses the vehicle retrieval button on the control panel. The control system repeats the lower vehicle platform removal action from step 1. After the lower vehicle platform 4 is completely removed from the travel track, the drive motor 201 reverses, and the upper vehicle platform 3 slowly descends until the bottom rubber pad 323 supports the upper surface of the lower vehicle platform 4, at which point the drive motor 201 stops. The user opens the enclosure door and pushes the vehicle out from the upper vehicle platform 3. After closing the door, the control system starts the upper vehicle platform 3 to rise and reset (repeating steps 4-5). Then, the lower vehicle platform 4 moves back to its initial position (repeating step 6), completing the vehicle retrieval process.

[0108] It should be noted that when the user opens the movable door of the enclosure 6, the lower vehicle platform 4 moves laterally out of the track under the drive of the walking motor 4101 until the control system detects the lower vehicle platform 4's arrival signal, the upper vehicle platform 3 descends to the ground, the user pushes the two-wheeled electric vehicle into the upper vehicle platform, the front wheels are inserted into the U-shaped slots, the infrared distance sensor detects that the vehicle is parked correctly, the user closes the movable door, the user presses the parking button, the drive motor 201 rotates forward, the upper vehicle platform rises to the predetermined height, the spring tensioning component 205 triggers the limit signal, the motor stops and self-locks, and the parking is completed.

[0109] When the user opens the enclosure door 6 to the start button for retrieving the vehicle, the drive motor 201 reverses, causing the upper vehicle platform 3 to descend to the upper surface of the lower vehicle platform 4 and be cushioned and supported by the rubber pad 323. When the user pushes the vehicle out, the user closes the enclosure door, causing the upper vehicle platform to rise and reset to the lower vehicle platform 4, which then moves laterally back to the track, completing the vehicle retrieval process.

[0110] After the vehicle is parked on the upper platform, the user inserts the charging plug into the charging port on the side of the platform. The intelligent charging module detects the battery voltage and matches the charging mode to start charging. Once charging is complete, the power is automatically cut off, and the control system sends a charging completion reminder. When the user retrieves the vehicle, they can simply unplug the plug.

[0111] In the description of this invention, it should be understood that the terms front and back, left and right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0112] Of course, those skilled in the art should understand that in this technical solution, the term "one" should be understood as at least one or more, that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0113] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rear-cantilever type two-wheeled electric vehicle garage lifting device, characterized in that, It includes a steel frame structure, a lifting drive assembly, at least one upper vehicle platform (3), a lower vehicle platform (4), a cable chain (5), and a travel track (7); The steel frame structure includes a top crossbeam (121) and a pair of channel steel rails (101) installed face to face on the rear side of the equipment. The channel steel rails (101) have their openings facing forward to form a closed lifting guide channel. The inner wall is provided with a micro-nano level self-lubricating coating, and the bottom is provided with a detachable dust collection tank. The lifting drive assembly is installed on the top crossbeam (121) and includes a drive motor (201), a take-up drum (202), a fixed pulley group (203), a single steel wire rope (204), and a spring tensioning assembly (205). The upper vehicle platform (3) also includes a movable pulley assembly (321), which serves as the only lifting point for the upper vehicle platform (3). One end of the steel wire rope (204) is fixedly connected to the outer circumference of the take-up drum (202), and the other end extends downward after passing through multiple fixed pulleys in the fixed pulley group (203) and passes through the movable pulley group (205). The wheel assembly (321) eventually winds back to the fixed point on the top crossbeam (121) or is reconnected to the take-up drum (202), forming a closed traction circuit together with the fixed pulley group (203) and the movable pulley assembly (321) to realize the single-point lifting of the upper vehicle platform (3); the wire rope (204) forms a closed traction circuit, and the spring tensioning assembly (205) includes a compression spring (2051), a spring fixing sleeve (2052), a clamping plate (2053) and a limit switch. The limit switch is electrically connected to the control system of the drive motor (201), and triggers emergency stop and electromagnetic braking when the threshold is exceeded; The upper vehicle platform (3) includes a frame, a parking panel (3011), a front wheel support plate assembly (302), four lifting wheels (322) and six evenly distributed bottom rubber pads (323). The four lifting wheels (322) are respectively installed on the rear two sides of the frame, two on each side. Their wheel rims are embedded between the inner walls of the channel steel rail (101). The wheel rims are covered with a wear-resistant rubber layer and the wheel axle is provided with a shock-absorbing bushing. The front wheel support plate has an elastic anti-slip pad layer in the U-shaped groove. Infrared distance sensors are provided on both sides of the frame. Lifting and lowering are prohibited when a set distance is detected. When the upper vehicle platform (3) is lowered to its lowest point, the bottom rubber pad (323) supports the lower vehicle platform (4). The upper platform cannot be lowered until the lower platform is completely removed. The lower vehicle platform (4) is provided with a walking drive mechanism at its bottom. The walking drive mechanism includes a walking motor (4101), a chain drive system and active / driven walking wheels, which are used to drive the lower vehicle platform (4) to move horizontally. The drag chain (5) accommodates power supply cables and signal cables. The power supply cables are connected to the intelligent charging module of the upper vehicle plate (3) and have overload protection, power-off when fully charged and communication feedback functions.

2. The rear cantilever type two-wheeled electric garage lifting device according to claim 1, characterized in that: It also includes a movable pulley assembly (321), which includes a pulley body (3211), a pulley shaft (3213), an anti-jump rope device (3212), and an internal bearing. The pulley body (3211) can rotate around the pulley shaft (3213), and the anti-jump rope device (3212) is located on both sides of the pulley body (3211). The internal bearing is installed between the pulley shaft (3213) and the pulley body (3211).

3. The rear cantilever type two-wheeled electric garage lifting device according to claim 2, characterized in that: It also includes a fence (6) that surrounds the projection area of ​​the equipment.

4. The rear cantilever type two-wheeled electric vehicle garage lifting device according to claim 1, characterized in that: The chain drive system of the walking drive mechanism includes a first sprocket, a first chain (4102), a second sprocket (4103), a third sprocket (4017), a second chain (4018), an active walking wheel axle (4106), and a fourth sprocket. The first sprocket is a transmission sprocket integrally formed with the output shaft of the walking motor (4101). The second sprocket (4103) and the third sprocket (4017) are coaxially fixed to the left active walking wheel axle (4106). The fourth sprocket is fitted onto the right active walking wheel axle (4106). The walking motor (4101) drives the two active walking wheel axles (4106) to rotate synchronously through chain drive.

5. The rear cantilever type two-wheeled electric vehicle garage lifting device according to claim 1, characterized in that: It also includes scraper (4201) and scraper (4202), which are elastic metal sheets or rubber strips, and are fixed to the bottom of the lower vehicle plate (4) near the driving wheel.

6. The rear cantilever type two-wheeled electric garage lifting device according to claim 1, characterized in that: The spring retaining sleeve (2052) is equipped with a proximity switch. The limit switch is fixed to the upper part of the inner wall of the sleeve by an L-shaped bracket, and the proximity switch is fixed to the top end face of the sleeve by a thread. The two can be selected or triggered simultaneously to stop the machine.

7. The rear cantilever type two-wheeled electric garage lifting device according to claim 6, characterized in that: The single steel wire rope (204) passes through the moving pulley assembly (321) of multiple upper vehicle plates (3) in sequence, and achieves synchronous lifting and lowering through the distribution path of the fixed pulley group (203).

8. The rear cantilever type two-wheeled electric garage lifting device according to claim 1, characterized in that: The detection threshold of the infrared distance sensor can be adjusted by the control system, with an adjustment range of 3-8cm.

9. The rear cantilever type two-wheeled electric garage lifting device according to claim 1, characterized in that: The intelligent charging module supports switching between fast and slow charging modes, and its output voltage is compatible with 12V-72V two-wheeled electric vehicles.

10. A method for three-dimensional parking of two-wheeled electric vehicles, applied to the rear cantilever type two-wheeled electric vehicle garage lifting device as described in any one of claims 1-9, characterized in that: Includes the following steps: Step 1, Vehicle Storage Preparation: Open the enclosure door, and the control system triggers the start of the walking drive mechanism of the lower vehicle platform. The chain drive system drives the active walking wheels on both sides to rotate synchronously, so that the lower vehicle platform moves laterally out of the walking track range until the ultrasonic sensor detects that the lower vehicle platform has arrived in place, and the walking motor stops. Step 2, Lowering the vehicle platform: After the lower vehicle platform is in place, the control system unlocks the lifting authority of the upper vehicle platform, the drive motor reverses, the winding drum releases the wire rope, and the upper vehicle platform descends along the rear channel steel track under the action of gravity. The lifting wheels roll along the inner wall of the track until the bottom rubber pad supports the ground, and the drive motor stops. Step 3, Vehicle Parking: The user pushes the two-wheeled electric vehicle from the front open area into the upper vehicle platform. The front wheels are inserted into the U-shaped slots of the front wheel support plate assembly. The infrared distance sensor detects the parking position of the vehicle. When the detection distance is within the set threshold range, the parking is deemed compliant. Step 4, Car platform rises: The user closes the enclosure door, triggers the parking command, drives the motor to rotate forward, and the winding drum tightens the wire rope. Through the closed traction circuit of a single wire rope, in conjunction with the pulley assembly, the upper car platform rises along the channel steel track. The spring tensioning assembly adjusts the wire rope tension in real time. Step 5, Position Locking: When the upper vehicle platform is raised to the preset height, the clamping plate of the spring tensioning assembly compresses the spring to the set stroke, triggering the limit switch and / or proximity switch to cut off the power to the drive motor and activate the electromagnetic brake, locking the upper vehicle platform in position. Step 6, Lower layer reset: After the upper layer vehicle platform is locked, the travel drive mechanism starts in reverse, and the lower layer vehicle platform moves back to the initial position along the travel track to complete the vehicle storage; Step 7, Vehicle Retrieval Operation: Trigger the vehicle retrieval command, repeat the lower vehicle carrier plate removal action from Step 1, then reverse the drive motor to release the steel cable, the upper vehicle carrier plate descends and supports the lower vehicle carrier plate. After the user retrieves the vehicle, repeat the reset actions from Steps 4 and 6 to complete the vehicle retrieval.

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