Chain direct drive type vertical circulation mechanical parking equipment

Abstract

The invention discloses chain direct-drive type vertical circulation mechanical parking equipment, and relates to the technical field of parking equipment, the chain direct-drive type vertical circulation mechanical parking equipment comprises a frame, a circulation chain, a tray, at least one primary unit and a plurality of secondary units, and the tray is connected to the circulation chain; the primary unit is fixedly arranged on the frame; the secondary units are fixedly arranged on the circulating chain and are distributed along the extending direction of the circulating chain; a gap is formed between the primary unit and the secondary unit, when the primary unit is powered on, electromagnetic induction is generated between the primary unit and the secondary unit, the secondary unit is driven to drive the circulating chain to operate, and the parking equipment is simple in transmission chain, low in failure rate, high in efficiency, low in operation noise and compact in structure.

Description

Technical Field

[0001] This invention relates to the field of parking equipment technology, and in particular to a chain-driven vertical circulation mechanical parking device. Background Technology

[0002] Vertical circulation mechanical parking systems are among the most widely used automated parking systems. They use a circulating chain to drive a vehicle-carrying pallet in a vertical circulation motion, thereby enabling vehicle storage and retrieval. Traditional vertical circulation parking systems typically employ a "motor + reducer + sprocket and chain" transmission method: the rotational power output by the motor is reduced and amplified by the reducer, then transmitted to the main shaft via the drive sprocket and transmission chain, and finally the circulating chain is driven by the shift fork on the main shaft.

[0003] This traditional transmission method has the following technical problems: The transmission chain is complex and has a high failure rate: The entire transmission system involves multiple mechanical components such as reducers, transmission chains, sprockets, and spindles, with a large number of parts and complex assembly relationships. Under long-term operation, the transmission chain is prone to wear and loosening, requiring frequent maintenance and adjustment, resulting in a high failure rate.

[0004] High energy loss and low efficiency: Power has to go through multiple stages of mechanical transmission (motor → reducer → sprocket and chain → main shaft → shift fork) before it reaches the actuator (circulating chain). Each stage of transmission has energy loss, which leads to a decrease in overall transmission efficiency and an increase in energy consumption.

[0005] High operating noise: The meshing transmission between the sprocket and the chain, as well as the friction between mechanical parts, inevitably generate significant operating noise, which affects the surrounding environment.

[0006] The structure is not compact: a large installation space needs to be reserved for transmission components such as motors and speed reducers, which increases the overall size and weight of the equipment. Summary of the Invention

[0007] The purpose of this invention is to provide a chain-driven vertical circulation mechanical parking device to solve the problems existing in the prior art. The device features a simple transmission chain, low failure rate, high efficiency, low operating noise, and compact structure.

[0008] To achieve the above objectives, the present invention provides the following solution: This invention provides a chain-driven vertical circulation mechanical parking device, comprising a frame, a circulation chain, a tray, at least one primary unit, and multiple secondary units. The tray is connected to the circulation chain. The primary unit is fixedly mounted on the frame. The secondary units are fixedly mounted on the circulation chain and distributed along the extension direction of the circulation chain. There is a gap between the primary unit and the secondary units. When the primary unit is energized, it generates electromagnetic induction with the secondary units, driving the secondary units to drive the circulation chain.

[0009] Preferably, the circulating chain includes multiple chain plates; the secondary unit is a secondary plate fixedly disposed on the chain plate.

[0010] Preferably, a pad is provided between some of the secondary plates and the chain plate to adjust the position of the secondary plates so that the outer surfaces of each secondary plate are flush.

[0011] Preferably, there are two sets of primary units, located on the inner and outer sides of the circulating chain, respectively, and each primary unit in the two sets of primary units is arranged in a one-to-one correspondence. There are also two sets of secondary units, located on the inner and outer sides of the circulating chain, respectively, and each secondary unit in the two sets of secondary units is arranged in a one-to-one correspondence, so that the magnetic attraction forces generated by the primary units and secondary units on the inner and outer sides of the circulating chain are balanced.

[0012] Preferably, the frame includes a front frame and a rear frame; the circulation chain includes a front circulation chain and a rear circulation chain respectively disposed on the front frame and the rear frame, and the tray is connected to both the front circulation chain and the rear circulation chain; the primary unit and the secondary unit can be arranged in two ways: first, the primary unit is disposed only on the front frame and the secondary unit is disposed only on the front circulation chain; second, the primary unit is disposed only on the rear frame and the secondary unit is disposed only on the rear circulation chain. It also includes a transmission mechanism; the transmission mechanism includes a transmission shaft and shift forks fixedly disposed at both ends of the transmission shaft; both the front circulating chain and the rear circulating chain include multiple chain plates, hinge shafts and rollers, adjacent chain plates are hinged through the hinge shafts, and the rollers are sleeved on the hinge shafts and roll in cooperation with the roller guide rails disposed on the frame; the two shift forks respectively mesh with the rollers on the front circulating chain and the rear circulating chain, and are used to transmit power to the other circulating chain through the transmission shaft when the primary unit drives one of the circulating chains to run, so as to realize the synchronous operation of the two circulating chains.

[0013] Preferably, the frame includes a front frame and a rear frame; the circulation chain includes a front circulation chain and a rear circulation chain respectively disposed on the front frame and the rear frame, and the tray is connected to both the front circulation chain and the rear circulation chain; the primary unit is disposed on both the front frame and the rear frame; the primary unit disposed on the front frame corresponds to the secondary unit disposed on the front circulation chain; and the primary unit disposed on the rear frame corresponds to the secondary unit disposed on the rear circulation chain.

[0014] Preferably, it also includes a brake disc and a brake caliper; the brake disc is disposed on a main shaft connected to the circulating chain drive, and the brake caliper is disposed on the frame; After the primary unit is powered off, the brake caliper clamps the brake disc, causing the equipment to stop operating.

[0015] Preferably, the system further includes a control system electrically connected to the plurality of primary units and configured to selectively supply power to some or all of the primary units based on load detection information on the tray.

[0016] Preferably, it also includes a tray guide rail disposed on the frame, wherein the tray is provided with guide wheels, and the guide wheels travel in the tray guide rail.

[0017] Preferably, each of the trays is provided with two sets of guide wheels, which are respectively located at the upper and lower parts of the tray, and each set of guide wheels has two guide wheels.

[0018] The present invention achieves the following technical effects compared to the prior art: This invention employs a primary unit fixed to a frame and a secondary unit fixed to a circulating chain. When the primary unit is energized, it induces electromagnetic induction with the secondary unit, directly driving the secondary unit to move the circulating chain. Because the primary and secondary units communicate via non-contact electromagnetic drive, intermediate transmission components such as motors, reducers, sprockets, and transmission chains are eliminated in traditional drive systems. This results in a shorter power transmission path, significantly reduced energy loss, and improved transmission efficiency. Simultaneously, the reduction in mechanical transmission components simplifies the overall structure of the equipment, making assembly and maintenance more convenient and reducing the failure rate. Furthermore, the electromagnetic drive method avoids vibrations and noise generated by mechanical meshing, resulting in smoother and quieter equipment operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in 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.

[0020] Figure 1 A schematic diagram of the structure of the chain direct-drive vertical circulation mechanical parking device provided by the present invention; Figure 2 This is a schematic diagram of the tray structure; Figure 3 This is a structural diagram of a circulating chain, a secondary unit, and a primary unit. Figure 4 for Figure 3 The front view; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a structural diagram of the secondary unit and the primary unit; Figure 7 This is a structural diagram of the transmission mechanism, brake disc, and brake caliper. Figure 8 A schematic diagram of the structure for the engagement of the shift fork and the circulating chain; Figure 9 A schematic diagram of the structure of the pallet guide rail and the pallet mating; Figure 10 This is a structural diagram of the pallet guide rail and the bottom guide wheels of the pallet; In the diagram: 1-Frame; 2-Pattern; 3-Circulating chain; 4-Primary unit; 5-Secondary unit; 6-Chain plate; 7-Plate; 8-Drive shaft; 9-Shift fork; 10-Brake disc; 11-Brake caliper; 12-Guide wheel; 13-Pattern guide rail; 14-Pattern bottom guide wheel; 15-Transmission mechanism. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide a chain-driven vertical circulation mechanical parking device to solve the problems existing in the prior art. The device features a simple transmission chain, low failure rate, high efficiency, low operating noise, and compact structure.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the core technical terms involved in this invention will first be explained below: 1. Elementary Unit The "primary unit" mentioned in this invention refers to an electromagnetic component fixedly mounted on the equipment frame for generating an alternating magnetic field. Its function is similar to the "stator" in a traditional rotary or linear motor.

[0025] 2. Secondary unit The "secondary unit" mentioned in this invention refers to a conductive or magnetic component that is directly fixed on the circulating chain and positioned opposite the primary unit. Its function is similar to the "rotor" in a traditional rotary or linear motor.

[0026] Through the above structure, the present invention transforms the traditional "rotary drive" that requires an intermediate conversion mechanism into "direct electromagnetic drive", realizing the integration of the power source and the execution component.

[0027] The following is combined with Figures 1 to 10 The following describes embodiments of the present invention.

[0028] Example 1 This invention provides a chain-driven vertical circulation mechanical parking device, comprising a frame 1, a circulation chain 3, a tray 2, at least one primary unit 4, and multiple secondary units 5. The tray 2 is connected to the circulation chain 3. The primary unit 4 is fixedly mounted on the frame 1. The secondary units 5 are fixedly mounted on the circulation chain 3 and distributed along the extension direction of the circulation chain 3. There is a gap between the primary unit 4 and the secondary units 5. When the primary unit 4 is energized, it generates electromagnetic induction with the secondary units 5, driving the secondary units 5 to drive the circulation chain 3.

[0029] This embodiment uses a primary unit 4 fixed to the frame 1 and a secondary unit 5 fixed to the circulating chain 3. When the primary unit 4 is energized, it generates electromagnetic induction with the secondary unit 5, directly driving the secondary unit 5 to drive the circulating chain 3. Since the electromagnetic drive between the primary unit 4 and the secondary unit 5 is non-contact, intermediate transmission components such as motors, reducers, sprockets, and transmission chains in traditional drive methods are eliminated. Therefore, the power transmission path is shorter, energy loss is significantly reduced, and transmission efficiency is improved. At the same time, the reduction of mechanical transmission components simplifies the overall structure of the equipment, making assembly and maintenance more convenient and reducing the failure rate. In addition, the electromagnetic drive method avoids the vibration and noise generated by mechanical meshing, making the equipment run more smoothly and quietly.

[0030] The primary unit 4 can be set to one or more, and can be flexibly configured according to equipment specifications and load requirements; the distribution density of the secondary unit 5 can also be adjusted along the direction of the circulating chain 3 to optimize the distribution of driving force. The relative positional relationship between the primary unit 4 and the secondary unit 5 is not limited, as long as electromagnetic induction drive can be achieved.

[0031] In some embodiments, the circulating chain 3 includes a plurality of chain plates 6; the secondary unit 5 is a secondary plate fixedly disposed on the chain plates 6.

[0032] In this embodiment, the secondary unit 5 is specifically defined as a secondary plate fixedly mounted on the chain plate 6, making the integration of the secondary unit 5 with the circulating chain 3 simpler and more reliable. The chain plate 6, as a basic component of the circulating chain 3, allows for direct fixing of the secondary plate without requiring significant modifications to the chain structure. This simplifies the processing and assembly process and reduces costs.

[0033] Of course, the secondary unit 5 can also be embedded inside the chain plate 6 or integrally formed with the chain plate 6 to further improve the integration and structural strength; the shape of the secondary plate is not limited to flat plate, and other geometric shapes such as T-shape, L-shape, etc. can be adopted according to the magnetic circuit design requirements to optimize the electromagnetic coupling effect.

[0034] In some embodiments, a pad 7 is provided between some of the secondary plates and the chain plate 6 to adjust the position of the secondary plates so that the outer surfaces of each secondary plate are flush.

[0035] Because the chain plates 6 in the circulating chain 3 are of different types (e.g., inner and outer chain plates), the surfaces of each chain plate 6 are not on the same plane, resulting in height differences. If the secondary plates are directly fixed to different chain plates 6, the outer surfaces of each secondary plate will not be in the same plane, meaning the air gap between each secondary plate and the primary unit 4 will be inconsistent. This uneven air gap will cause differences in electromagnetic coupling strength at different locations, affecting the stability and consistency of electromagnetic thrust, and may even cause operational vibration.

[0036] Based on this, this embodiment compensates for the installation height of the secondary plates by setting shims 7 between different chain plates 6 and secondary plates, ensuring that the outer surfaces of all secondary plates are ultimately on the same plane. The thickness of the shim 7 is determined according to the positional deviation of its corresponding chain plate 6 to eliminate height errors caused by differences in the type of chain plate 6. Through the above structure, the air gap between each secondary plate and the primary unit 4 is ensured to be uniform, thereby guaranteeing a stable output of electromagnetic driving force, improving the smoothness and reliability of equipment operation, and also helping to extend the service life of the primary unit 4 and the secondary unit 5.

[0037] In some embodiments, such as Figure 4 and Figure 5As shown, there are two sets of primary units 4, located on the inner and outer sides of the circulating chain 3 respectively, and each primary unit 4 in the two sets of primary units 4 is arranged in a one-to-one correspondence. There are also two sets of secondary units 5, located on the inner and outer sides of the circulating chain 3 respectively, and each secondary unit 5 in the two sets of secondary units 5 is arranged in a one-to-one correspondence, so that the magnetic attraction forces generated by the primary units 4 and secondary units 5 on the inner and outer sides of the circulating chain 3 are balanced.

[0038] In this embodiment, both the primary unit 4 and the secondary unit 5 are configured as two groups, located on the inner and outer sides of the circulating chain 3, respectively, with the units on the inner and outer sides corresponding one-to-one. When the primary unit 4 is energized, electromagnetic attraction is generated simultaneously on both the inner and outer sides. Since the attraction forces on the inner and outer sides are opposite in direction and equal in magnitude, they can balance and cancel each other out, thereby preventing the circulating chain 3 from shifting to one side due to unilateral magnetic attraction during operation. This effectively prevents abnormal friction between the chain and the guide rail, reduces running resistance and wear, and improves running stability and transmission efficiency.

[0039] Of course, the number of primary units 4 and secondary units 5 on the inner and outer sides does not have to be strictly one-to-one, as long as the overall magnetic attraction force is basically balanced; auxiliary guide structures can also be set on the frame 1 to further improve the stability of the chain operation, such as the rollers of the circulating chain 3 and the roller guide rails on the frame 1 mentioned in the following embodiments.

[0040] In some embodiments, frame 1 includes a front frame and a rear frame; the circulating chain 3 includes a front circulating chain and a rear circulating chain respectively disposed on the front frame and the rear frame, and tray 2 is connected to both the front circulating chain and the rear circulating chain; the primary unit 4 and the secondary unit 5 are arranged in two ways: first, the primary unit 4 is disposed only on the front frame and the secondary unit 5 is disposed only on the front circulating chain; second, the primary unit 4 is disposed only on the rear frame and the secondary unit 5 is disposed only on the rear circulating chain; it also includes a transmission mechanism 15; the transmission mechanism 15 It includes a drive shaft 8 and shift forks 9 fixedly installed at both ends of the drive shaft 8; both the front and rear circulating chains include multiple chain plates 6, hinge shafts and rollers, adjacent chain plates 6 are hinged by the hinge shaft, and the rollers are sleeved on the hinge shaft and roll in cooperation with the roller guide rails set on the frame 1; the two shift forks 9 respectively mesh with the rollers on the front and rear circulating chains, and are used to transmit power to the other circulating chain 3 through the drive shaft 8 when the primary unit 4 drives one of the circulating chains 3 to run, so as to realize the synchronous operation of the two circulating chains 3.

[0041] This embodiment employs a single-sided drive with a transmission mechanism 15. The primary unit 4 and secondary unit 5 are only located on the front frame and the front circulating chain (or the rear frame and the rear circulating chain), and power is transmitted to the other chain via the drive shaft 8 and the shift fork 9. This solution reduces the number of primary units 4 and secondary units 5 while ensuring synchronous operation of the front and rear circulating chains, thus lowering the equipment manufacturing cost. Simultaneously, the meshing transmission between the shift fork 9 and the roller ensures reliable power transmission, and since the roller is an existing component of the chain, no additional transmission elements are needed, resulting in a compact structure.

[0042] In some embodiments, each chain plate 6 is provided with a secondary unit 5.

[0043] In some embodiments, the frame 1 includes a front frame and a rear frame; the circulation chain 3 includes a front circulation chain and a rear circulation chain respectively disposed on the front frame and the rear frame, and the tray 2 is connected to both the front circulation chain and the rear circulation chain; the primary unit 4 is disposed on both the front frame and the rear frame; the primary unit 4 disposed on the front frame corresponds to the secondary unit 5 disposed on the front circulation chain; the primary unit 4 disposed on the rear frame corresponds to the secondary unit 5 disposed on the rear circulation chain.

[0044] This embodiment employs a dual-side independent drive scheme, with the primary unit 4 simultaneously mounted on both the front and rear frames to drive the front and rear circulating chains respectively. This scheme eliminates the need for mechanical transmission mechanisms 15 such as the drive shaft 8 and shift fork 9; power is directly applied to the front and rear chains, resulting in the shortest transmission path, lowest energy loss, and faster response speed.

[0045] In some embodiments, the chain-driven vertical circulation mechanical parking device further includes a brake disc 10 and a brake caliper 11; the brake disc 10 is mounted on the main shaft that is connected to the circulation chain 3, and the brake caliper 11 is mounted on the frame 1; after the primary unit 4 is powered off, the brake caliper 11 clamps the brake disc 10, causing the device to stop running.

[0046] This embodiment includes a brake disc 10 and a brake caliper 11. After the primary unit 4 is powered off, the brake caliper 11 clamps the brake disc 10 to stop the equipment. Since the driving force disappears immediately after power failure in electromagnetic drive systems, the equipment may slip or slide under load. The mechanical braking device ensures that the equipment can reliably stop and remain stationary at any position, improving the safety and reliability of the equipment. The brake disc 10 is mounted on the main shaft connected to the circulating chain 3, enabling direct braking of the chain drive system. It provides rapid braking response and a large braking torque.

[0047] Of course, the braking device can adopt a normally closed structure, that is, it automatically brakes when the power is off and is released by hydraulic or electromagnetic force when the power is on, in order to meet the safety specifications. The braking method is not limited to disc brakes, but can also be drum brakes, caliper brakes or electromagnetic brakes. The braking control can be linked with the control system to realize automatic emergency braking in the event of a fault.

[0048] Specifically, the main shaft needs to be connected to the circulating chain 3 for transmission, for example, by using the shift fork 9 for transmission.

[0049] When the implementation scheme has a transmission mechanism 15, that is, a transmission shaft 8, the main shaft and the transmission shaft 8 can be coaxially and fixedly connected, that is, the transmission shaft 8 and the main shaft share the shift fork 9, or the main shaft can be regarded as the extension shaft of the transmission shaft 8, that is, the two are fixedly connected.

[0050] In some embodiments, the chain-driven vertical circulation mechanical parking device also includes a control system electrically connected to a plurality of primary units 4 and configured to selectively supply power to some or all of the primary units 4 based on load detection information on the tray 2.

[0051] This embodiment features a control system that selectively supplies power to some or all of the primary units 4 based on load detection information on tray 2. When the equipment load is low, not all primary units 4 need to be operational; the control system can supply power only to some of them, reducing energy consumption and achieving on-demand power supply and energy saving. When the load increases, the control system can automatically increase the number of primary units 4 in operation to ensure sufficient driving force. This intelligent control strategy can significantly improve the equipment's energy efficiency ratio, reduce operating costs, and extend the equipment's service life.

[0052] Load detection information can be obtained through weight sensors, pressure sensors, or current sensors installed on the tray 2 or chain; the control system can also optimize the power supply strategy of the primary unit 4 by combining parameters such as vehicle access frequency and running speed to achieve a higher level of energy-saving control; the power supply method can be flexibly configured by group control or independent control.

[0053] In some embodiments, the chain-driven vertical circulation mechanical parking device also includes a tray rail 13 mounted on the frame 1, and a guide wheel 12 mounted on the tray 2, which travels in the tray rail 13.

[0054] In this embodiment, a pallet guide rail 13 is installed on the frame 1, and a guide wheel 12 is installed on the pallet 2. The guide wheel 12 travels within the pallet guide rail 13. This guiding structure can effectively constrain the movement trajectory of the pallet 2 during vertical circulation, preventing the pallet 2 from swaying back and forth or left and right, and ensuring that the vehicle is parked smoothly. At the same time, the cooperation between the guide rail and the guide wheel 12 can share part of the load, reduce the stress on the chain, and improve the safety and reliability of the equipment operation.

[0055] The guide rail can be made of shaped steel, square tube or special guide rail profile, and the guide wheel 12 can be made of wear-resistant materials such as rolling bearing or nylon wheel; the number and arrangement of the guide wheel 12 can be optimized according to the size of the pallet 2 and the load.

[0056] In some embodiments, each tray 2 is provided with two sets of guide wheels 12, which are respectively located on the upper and lower parts of the tray 2, and each set of guide wheels 12 has two guide wheels 12.

[0057] In this embodiment, the four-point guide structure can constrain the pallet 2 from both the top and bottom directions, effectively resisting the overturning moment caused by the shift of the center of gravity during the cycle, making the pallet 2 run more smoothly; the arrangement of two guide wheels 12 in each group can distribute the force, reduce the load on a single guide wheel 12, and extend the service life of the guide wheel 12; at the same time, the larger distance between the upper and lower groups of guide wheels 12 can provide better guiding accuracy and anti-eccentric load capability.

[0058] Of course, the number of guide wheels 12 is not limited to two per group. Three or four guide wheels 12 per group can also be used depending on the width of the pallet 2 and the load. The guide wheels 12 can be arranged symmetrically or staggered. The material of the guide wheels 12 can be selected from wear-resistant rubber, polyurethane or metal materials according to the usage environment.

[0059] In some embodiments, in order to further improve the stability of the pallet 2 when it is at the bottom, two sets of pallet bottom guide wheels 14 are provided at the bottom of the frame 1. The bottom of the pallet 2 is provided with a structure that cooperates with the pallet bottom guide wheels 14, such as a chute, a track, a limiting plate, etc. The pallet bottom guide wheels 14 can provide guidance for the pallet 2 to make it run smoothly and prevent it from swinging along the lateral direction (i.e., the length direction of the pallet 2).

[0060] In some embodiments, the tray 2 includes a top support rod and a bottom tray plate. The support rod is located at the top center of the tray plate. The support rod and the tray plate are fixedly connected by connecting rods on both sides. The support rod and the triangular plate fixedly mounted on the circulating chain 3 are hinged by bearings.

[0061] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A chain-driven vertical circulation mechanical parking device, comprising a frame, a circulation chain, and a tray, wherein the tray is connected to the circulation chain, characterized in that, Also includes: At least one primary unit is fixedly mounted on the frame; Multiple secondary units are fixedly mounted on the circulating chain and distributed along the extending direction of the circulating chain; There is a gap between the primary unit and the secondary unit. When the primary unit is energized, it generates electromagnetic induction with the secondary unit, driving the secondary unit to drive the circulating chain to run.

2. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 1, characterized in that: The circulating chain includes multiple chain plates; the secondary unit is a secondary plate fixedly mounted on the chain plate.

3. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 2, characterized in that: A pad is provided between some or all of the secondary plates and the chain plate to adjust the position of the secondary plates so that the outer surfaces of each secondary plate are flush.

4. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 1, characterized in that: The primary units are arranged in two sets, located on the inner and outer sides of the circulating chain, respectively, and each primary unit in the two sets is arranged in a one-to-one correspondence. The secondary units are also arranged in two sets, located on the inner and outer sides of the circulating chain, respectively, and each secondary unit in the two sets is arranged in a one-to-one correspondence, so that the magnetic attraction forces generated by the primary units and secondary units on the inner and outer sides of the circulating chain are balanced.

5. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 4, characterized in that: The frame includes a front frame and a rear frame; the circulation chain includes a front circulation chain and a rear circulation chain respectively disposed on the front frame and the rear frame, and the tray is connected to both the front circulation chain and the rear circulation chain; the primary unit and the secondary unit can be arranged in two ways: first, the primary unit is disposed only on the front frame and the secondary unit is disposed only on the front circulation chain; second, the primary unit is disposed only on the rear frame and the secondary unit is disposed only on the rear circulation chain. It also includes a transmission mechanism; the transmission mechanism includes a transmission shaft and shift forks fixedly disposed at both ends of the transmission shaft; both the front circulating chain and the rear circulating chain include multiple chain plates, hinge shafts and rollers, adjacent chain plates are hinged through the hinge shafts, and the rollers are sleeved on the hinge shafts and roll in cooperation with the roller guide rails disposed on the frame; the two shift forks respectively mesh with the rollers on the front circulating chain and the rear circulating chain, and are used to transmit power to the other circulating chain through the transmission shaft when the primary unit drives one of the circulating chains to run, so as to realize the synchronous operation of the two circulating chains.

6. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 4, characterized in that: The frame includes a front frame and a rear frame; the circulation chain includes a front circulation chain and a rear circulation chain respectively disposed on the front frame and the rear frame, and the tray is connected to both the front circulation chain and the rear circulation chain; the primary unit is disposed on both the front frame and the rear frame; the primary unit disposed on the front frame corresponds to the secondary unit disposed on the front circulation chain; the primary unit disposed on the rear frame corresponds to the secondary unit disposed on the rear circulation chain.

7. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 1, characterized in that: It also includes a brake disc and a brake caliper; the brake disc is mounted on a main shaft connected to the circulating chain drive, and the brake caliper is mounted on the frame. After the primary unit is powered off, the brake caliper clamps the brake disc, causing the equipment to stop operating.

8. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 1, characterized in that: It also includes a control system electrically connected to the plurality of primary units and configured to selectively supply power to some or all of the primary units based on load detection information on the tray.

9. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 1, characterized in that: It also includes a pallet guide rail mounted on the frame, wherein the pallet is provided with guide wheels that travel in the pallet guide rail.

10. The chain-driven direct-drive vertical circulation mechanical parking device according to claim 9, characterized in that: Each of the trays is provided with two sets of guide wheels, which are respectively located at the upper and lower parts of the tray, and each set of guide wheels has two guide wheels.

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