Centering device, lifting machine and battery replacing station

Abstract

The invention discloses a centering device, a lifting machine and a battery swapping station, the centering device is arranged in a lifting device of a vehicle carrying platform and is arranged corresponding to a space between two wheels at the same end of a battery swapping vehicle, and the two ends of the lifting device are respectively provided with a wheel limiting mechanism which is sunken downwards; the centering device comprises two push plates and a transmission mechanism, wherein the two push plates are arranged in the wheel limiting mechanisms respectively and face the inner side walls of the corresponding wheels, the transmission mechanism is connected with the two push plates respectively to drive the two push plates to act synchronously to push the wheels of the battery changing vehicle, and the two push plates are movably arranged in the corresponding wheel limiting mechanisms through guide mechanisms respectively. The centering device is arranged in a lifting device of a vehicle carrying platform, is used for centering and adjusting the position of the battery replacing vehicle, and is arranged corresponding to the space between two wheels at the same end of the battery replacing vehicle, so that the space between the two wheels is fully utilized, the structural layout is optimized, the running track of the battery replacing vehicle is not limited, and the service life of the battery replacing vehicle is prolonged. And the battery-changing vehicle can run conveniently.

Description

Technical Field

[0001] The present invention relates to an alignment device, a lift and a battery swapping station. Background Art

[0002] Electric vehicles have the advantages of zero emissions, low noise, and very economical operation and maintenance, and are increasingly favored by users. The energy used by electric vehicles is the electric energy provided by the power battery packs carried by themselves. After the electric energy of the electric vehicle is used up, it needs to be charged. Due to the limitations of existing battery technologies and charging technologies, it takes a long time to fully charge an electric vehicle, which is not as simple and fast as directly refueling a fuel vehicle. Therefore, in order to reduce the waiting time of users, replacing the battery when the electric energy of the electric vehicle is almost exhausted is an effective means. In order to facilitate the replacement of the battery of the electric vehicle and meet the battery swapping needs of the electric vehicle, it is necessary to build a battery swapping station. With the rapid popularization of electric vehicles, more battery swapping stations need to be built to meet the demand.

[0003] In existing battery swapping stations, in order to perform the disassembly or installation operation on the battery installed at the bottom of the electric vehicle, a lift is generally set up to lift the electric vehicle to a certain height, leaving enough space for the battery swapping cart to enter and exit the bottom of the vehicle and perform the disassembly and assembly operations. Since most electric vehicles are driven by the driver to the area corresponding to the lift, the parking positions of different vehicles will inevitably be different, which is not convenient for the battery swapping cart to perform the battery swapping operation. Therefore, the vehicle position can be adjusted in advance. In the prior art, a pushing mechanism is often set in the outer area of the lift to push the wheels of the vehicle from the outside to adjust the position of the vehicle in the longitudinal direction of the vehicle body to the centered state, so as to facilitate the battery swapping cart to enter and exit the bottom of the vehicle between the front and rear wheels of the vehicle. However, this pushing mechanism is located outside the wheels, which limits the driving trajectory of the vehicle and is not convenient for driving. Moreover, most of this structure is realized by the cooperation of a servo motor and a ball screw. The installation and maintenance costs of this pushing mechanism are very high and it is very uneconomical. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of uneconomical alignment devices in the prior art, and provide an alignment device, a lift and a battery swapping station.

[0005] The present invention solves the above technical problem through the following technical solutions:

[0006] An alignment device is arranged on a vehicle-carrying platform and is used to perform centering adjustment on the position of a battery swapping vehicle. The alignment device is arranged in a lifting device of the vehicle-carrying platform and is correspondingly arranged relative to the space between two wheels at the same end of the battery swapping vehicle.

[0007] Wheel limiting mechanisms that are recessed downward are respectively arranged at both ends of the lifting device.

[0008] The centering device includes: two push plates respectively arranged inside the wheel limiting mechanism and facing the inner side walls of the corresponding wheels, and a transmission mechanism respectively connecting the two push plates to drive them to act synchronously to push against the wheels of the battery swapping vehicle.

[0009] The two push plates are respectively movably arranged inside the corresponding wheel limiting mechanism through guiding mechanisms.

[0010] In this solution, the centering device is arranged inside the lifting device of the vehicle-carrying platform, used to perform centering adjustment on the position of the battery swapping vehicle, and is correspondingly arranged relative to the space between the two wheels at the same end of the battery swapping vehicle, making full use of the space between the two wheels, optimizing the structural layout, not restricting the driving trajectory of the battery swapping vehicle, facilitating the driving of the battery swapping vehicle, and the two push plates are respectively arranged corresponding to the wheels on both sides of the clamping lane, and the two push plates are synchronously driven by the transmission mechanism, so as to push against the left wheel and the right wheel, thereby quickly centering the position of the battery swapping vehicle and improving the centering speed. In addition, the guiding mechanism is used for the guiding function of the two push plates to ensure that the two push plates push against along the direction set by the guiding mechanism and improve the accuracy of the moving direction.

[0011] Preferably, the wheel limiting mechanism includes a base and two rows of rollers arranged side by side in a V shape on the upper surface of the base. The base includes two side plates for installing the rollers and a bottom plate fixing the two side plates below the rollers.

[0012] The push plate includes a plate piece located above the roller and a sliding seat located below the roller and used for fixing the plate piece.

[0013] The sliding seat is movably arranged on the bottom plate through the guiding mechanism.

[0014] In this solution, the two rows of rollers form a downwardly concave V-shaped groove for limiting the wheels of the battery swapping vehicle. The two side plates are connected to the bottom plate to form a base for installing the rollers.

[0015] The plate piece is located above the roller, so that when the plate piece pushes against the wheel, the roller will not interfere with the movement of the plate piece. The sliding seat is arranged below the roller to hide the structure of the sliding seat, which will not affect the driving of the battery swapping vehicle, and the sliding seat can slide in the moving direction of the push plate to reduce the friction of the push plate on the bottom plate.

[0016] Preferably, the base further includes two first reinforcing plates respectively connecting the ends of the two side plates and the bottom plate, and a second reinforcing plate arranged close to the push plate and connecting the two first reinforcing plates. The second reinforcing plate is arranged parallel to the adjacent side plate.

[0017] The sliding seat is movably arranged between the second reinforcing plate and the adjacent side plate.

[0018] In this solution, two first reinforcing plates are used to install the rollers, and two second reinforcing plates are used to install the sliding seat. Since the two rows of rollers are used to carry the wheels of the battery swapping vehicle, the weight of the battery swapping vehicle is borne by the rollers. By setting the first reinforcing plate and the second reinforcing plate, the support strength of the base is improved.

[0019] Preferably, the guiding mechanism includes a optical axis and a bronze bushing. Two ends of the optical axis are respectively installed on the second reinforcing plate and the corresponding side plate, and the bronze bushing is sleeved on the optical axis after passing through the sliding seat.

[0020] In this solution, the sliding seat realizes the guiding and sliding function through the optical axis and the bronze bushing, which ensures the moving direction of the plate and reduces the driving force of the plate at the same time. The guiding mechanism composed of the optical axis and the bronze bushing has high guiding precision, low installation cost and is easy to maintain.

[0021] Preferably, at least one end face of the optical axis is provided with an anti-rotation boss.

[0022] In this solution, the anti-rotation boss is arranged on the optical axis to prevent the optical axis from rotating relative to the base. If the optical axis rotates, the abrasion between the optical axis and the bronze bushing, and between the optical axis and the second reinforcing plate and the side plate of the base will be aggravated, the reliability of the guiding mechanism will be reduced, and the service life will also be shortened.

[0023] Preferably, the number of the optical axis and the bronze bushing is two, and they are arranged side by side at two ends of the sliding seat.

[0024] In this solution, with the above structure, the sliding seat is evenly stressed, which is convenient for the sliding seat to slide smoothly on the two optical axes and improves the reliability.

[0025] Preferably, the two rows of rollers are arranged at intervals, and the push plate further includes a transfer plate penetrating through the interval area, and the transfer plate is respectively connected to the plate and the sliding seat.

[0026] In this solution, the transfer plate connects and fixes the plate and the sliding seat. When the sliding seat moves, the plate is driven to move through the transfer plate, which ensures the synchronous movement of the plate and the sliding seat. At the same time, the sliding of the sliding seat also reduces the driving force of the plate.

[0027] Preferably, the push plate further includes a connecting plate fixed to one side of the sliding seat and facing the transmission mechanism, and the connecting plate penetrates through the side plate and is connected to the transmission mechanism.

[0028] In this solution, one end of the connecting plate is connected to the sliding seat, and the other end of the connecting plate is connected to the transmission mechanism. The transmission mechanism drives the sliding seat to move through the connecting plate, and the sliding seat drives the plate of the push plate to move, so as to push against the wheels of the battery swapping vehicle.

[0029] Preferably, the plate includes a support layer and a buffer layer connected to each other, and the buffer layer is disposed on a side of the support layer close to the wheel.

[0030] In this solution, the buffer layer is used to reduce the impact and friction on the wheel when the plate pushes against the wheel, thereby protecting the wheel.

[0031] Preferably, the transmission mechanism includes a first transmission unit, a second transmission unit, and a synchronization unit. The two push plates are divided into a first push plate and a second push plate.

[0032] The first transmission unit is connected to the first push plate, and the second transmission unit is connected to the second push plate.

[0033] The synchronization unit includes a driving wheel and a driven wheel disposed at two ends corresponding to the moving strokes of the first transmission unit and the second transmission unit, and a synchronizing member connecting the driving wheel and the driven wheel. The centering device further includes a driving mechanism, and the driving mechanism is connected to the driving wheel to transmit power.

[0034] The first transmission unit and the second transmission unit are respectively connected to the synchronizing member on different sides of the driving wheel to perform synchronous actions.

[0035] In this solution, the synchronizing member is connected to the driving wheel and the driven wheel. The driving wheel drives the driven wheel through the synchronizing member. The first transmission unit and the second transmission unit are both connected to the same synchronizing member to realize the movement of the first push plate and the second push plate. Moreover, the synchronizing member can also enable the first transmission unit and the second transmission unit to perform synchronous transmission, while ensuring that the transmission amounts of the first transmission unit and the second transmission unit are the same, improving the centering accuracy of the battery swapping vehicle and facilitating the quick centering of the battery swapping vehicle. When the driving wheel rotates, the first transmission unit and the second transmission unit move synchronously. Only the driving wheel provides power, and there is no need to set multiple power sources, simplifying the structural arrangement. In order to make the first push plate and the second push plate move in opposite directions and drive the wheels on both sides of the clamping lane, the first transmission unit and the second transmission unit are respectively connected to different sides of the synchronizing member, so as to realize the synchronous movement of the first push plate and the second push plate while making their moving directions opposite. Preferably, the synchronizing member is a synchronous belt or a chain, and other components capable of realizing the synchronous movement of the first push plate and the second push plate. The driving wheel and the driven wheel can be rollers or gears.

[0036] A lifting machine, the lifting machine includes the centering device as described above.

[0037] A battery swapping station, the battery swapping station includes the lifting machine as described above.

[0038] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0039] The positive and progressive effects of the present invention are as follows: The centering device is arranged in the lifting device of the vehicle-carrying platform and is used to adjust the centering of the position of the battery-changing vehicle. It is correspondingly arranged relative to the space between two wheels at the same end of the battery-changing vehicle, making full use of the space between the two wheels, optimizing the structural layout, not restricting the driving trajectory of the battery-changing vehicle, facilitating the driving of the battery-changing vehicle, and the two push plates are respectively arranged corresponding to the wheels on both sides of the clamping lane. The two push plates are synchronously driven by a transmission mechanism to push against the left wheel and the right wheel, so as to quickly center the position of the battery-changing vehicle and improve the centering speed. In addition, the guiding mechanism is used for the guiding function of the two push plates to ensure that the two push plates push against along the direction set by the guiding mechanism, improving the accuracy of the moving direction. Description of the Drawings

[0040] Figure 1 Structural schematic diagram of a lift in a preferred embodiment of the present invention Figure 1 。

[0041] Figure 2 Structural schematic diagram of a lift with a hidden cover plate in a preferred embodiment of the present invention Figure 2 。

[0042] Figure 3 For Figure 2 Enlarged view of part A in

[0043] Figure 4 Structural schematic diagram of a lift with a hidden cover plate in a preferred embodiment of the present invention Figure 3 。

[0044] Figure 5 Structural schematic diagram of a lift with a hidden cover plate and some rollers in a preferred embodiment of the present invention Figure 4 。

[0045] Figure 6 For Figure 5 Enlarged view of part B in

[0046] Figure 7 Structural schematic diagram of a wheel limiting mechanism in a preferred embodiment of the present invention.

[0047] Description of the reference numerals:

[0048] Centering device 100

[0049] Wheel limiting mechanism 1

[0050] Base 11

[0051] Side plate 111

[0052] Bottom plate 112

[0053] First reinforcing plate 113

[0054] Second reinforcing plate 114

[0055] Roller 12

[0056] Pusher plate 3

[0057] First pusher plate 301

[0058] Second pusher plate 302

[0059] Plate 31

[0060] Sliding seat 32

[0061] Adapter plate 33

[0062] Connecting plate 34

[0063] Transmission mechanism 4

[0064] First transmission unit 41

[0065] Second transmission unit 42

[0066] Synchronization unit 5

[0067] Driving wheel 51

[0068] Driven wheel 52

[0069] Synchronizer 53

[0070] Guide mechanism 6

[0071] Optical axis 61

[0072] Brass bushing 62

[0073] Drive mechanism 7 Specific embodiments

[0074] The present invention will be described more clearly and completely below by way of examples in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the described examples thereby.

[0075] As Figures 1-7As shown in the figure, this embodiment discloses a centering device. The centering device 100 is arranged in the lifting device of the vehicle-carrying platform and is used to adjust the centering of the position of the battery-swapping vehicle. The centering device 100 is correspondingly arranged in the space between two wheels at the same end of the battery-swapping vehicle. Wheel limiting mechanisms 1 with downward depressions are respectively arranged at both ends of the lifting device. The centering device 100 includes two push plates 3 (a first push plate 301 and a second push plate 302) respectively arranged in the wheel limiting mechanisms 1 and facing the inner walls of the corresponding wheels, and a transmission mechanism 4 respectively connecting the two push plates 3 to drive them to act synchronously to push against the wheels of the battery-swapping vehicle. The two push plates 3 are respectively movably arranged in the corresponding wheel limiting mechanisms 1 through guiding mechanisms 6. The centering device 100 is arranged in the lifting device of the vehicle-carrying platform and is used to adjust the centering of the position of the battery-swapping vehicle. It is correspondingly arranged in the space between two wheels at the same end of the battery-swapping vehicle, making full use of the space between the two wheels, optimizing the structural layout, not restricting the driving trajectory of the battery-swapping vehicle, facilitating the driving of the battery-swapping vehicle. Moreover, the two push plates 3 are respectively arranged in one-to-one correspondence with the wheels on both sides of the clamping lane. The two push plates 3 are synchronously driven by the transmission mechanism 4 to push against the left wheel and the right wheel, so as to quickly center the position of the battery-swapping vehicle and improve the centering speed. In addition, the guiding mechanism 6 is used for guiding the two push plates 3 to ensure that the two push plates 3 push against along the direction set by the guiding mechanism 6, improving the accuracy of the moving direction.

[0076] As Figures 2-7 shown, the wheel limiting mechanism 1 includes a base 11 and two rows of rollers 12 arranged side by side in a V shape on the upper surface of the base 11. The two rows of rollers 12 form a downwardly concave V-shaped groove for limiting the wheels of the battery-swapping vehicle. The base 11 includes two side plates 111 for installing the rollers 12 and a bottom plate 112 fixing the two side plates 111 below the rollers 12. The two side plates 111 are connected to the bottom plate 112 to form the base 11 for installing the rollers 12. The push plate 3 includes a plate piece 31 located above the roller 12 and a sliding seat 32 located below the roller 12 and used for fixing the plate piece 31. The sliding seat 32 is movably arranged on the bottom plate 112 through the guiding mechanism 6. The plate piece 31 is located above the roller 12, so that when the plate piece 31 pushes against the wheel, the roller 12 will not interfere with the movement of the plate piece 31. The sliding seat 32 is arranged below the roller 12, hiding the structure of the sliding seat 32, not affecting the driving of the battery-swapping vehicle, and the sliding seat 32 can slide in the moving direction of the push plate 3 to reduce the friction of the push plate 3 on the bottom plate 112.

[0077] As Figure 7As shown in the figure, the base 11 further includes two first reinforcing plates 113 respectively connecting the ends of the two side plates 111 and the bottom plate 112, and a second reinforcing plate 114 disposed near the push plate 3 and connecting the two first reinforcing plates 113. The second reinforcing plate 114 is arranged parallel to the adjacent side plate 111. The sliding seat 32 is movably disposed between the second reinforcing plate 114 and the adjacent side plate 111. Both ends of the roller 12 are respectively mounted on the two first reinforcing plates 113, and the two second reinforcing plates 114 are used to support and mount the sliding seat 32. In addition, since the two rows of rollers 12 are used to carry the wheels of the battery swapping vehicle, the weight of the battery swapping vehicle is borne by the rollers 12. By providing the first reinforcing plate 113 and the second reinforcing plate 114, the support strength of the base 11 is improved.

[0078] As Figure 6 shown in the figure, the guiding mechanism 6 includes a optical axis 61 and a copper bushing 62. Both ends of the optical axis 61 are respectively mounted on the second reinforcing plate 114 and the corresponding side plate 111. The copper bushing 62 is sleeved on the optical axis 61 after passing through the sliding seat 32. The sliding seat 32 realizes the guiding function through the optical axis 61 and the copper bushing 62, ensures the moving direction of the plate 31, and at the same time reduces the driving force of the plate 31. The guiding mechanism 6 composed of the optical axis 61 and the copper bushing 62 has high guiding precision, low installation cost and is easy to maintain. Preferably, the number of the optical axis 61 and the copper bushing 62 is two, and they are arranged side by side at both ends of the sliding seat 32, so that the sliding seat 32 is evenly stressed, facilitating the smooth sliding of the sliding seat 32 on the two optical axes 61 and improving the reliability.

[0079] At least one end face of the optical axis 61 is provided with an anti-rotation boss (not shown in the figure) for preventing the optical axis 61 from rotating relative to the base 11. If the optical axis 61 rotates, the abrasion between the optical axis 61 and the copper bushing 62, and between the optical axis 61 and the second reinforcing plate 114 and the side plate 111 of the base 11 will be aggravated, reducing the reliability and service life of the guiding mechanism 6.

[0080] As Figure 6 shown in the figure, the two rows of rollers 12 are arranged at intervals. The push plate 3 further includes a transfer plate 33 penetrating through the interval area. The transfer plate 33 connects the plate 31 and the sliding seat 32 respectively. The transfer plate 33 connects and fixes the plate 31 and the sliding seat 32. When the sliding seat 32 moves, the plate 31 is driven to move through the transfer plate 33, ensuring the synchronous movement of the plate 31 and the sliding seat 32. At the same time, the sliding of the sliding seat 32 also reduces the driving force of the plate 31.

[0081] As Figure 6As shown in the figure, the pusher plate 3 further includes a connecting plate 34 fixed to one side of the sliding seat 32 and facing the transmission mechanism 4. The connecting plate 34 passes through the side plate 111 and is connected to the transmission mechanism 4. One end of the connecting plate 34 is connected to the sliding seat 32, and the other end of the connecting plate 34 is connected to the transmission mechanism 4. The transmission mechanism 4 drives the sliding seat 32 to move through the connecting plate 34, and the sliding seat 32 drives the plate piece 31 of the pusher plate 3 to move, thereby pushing against the wheels of the battery swapping vehicle.

[0082] The plate piece 31 includes a support layer and a buffer layer connected to each other. The buffer layer is arranged on the side of the support layer close to the wheel. The buffer layer is used to reduce the impact and friction on the wheel when the plate piece 31 pushes against the wheel, so as to protect the wheel.

[0083] As Figures 2-6 As shown in the figure, the transmission mechanism 4 includes a first transmission unit 41, a second transmission unit 42 and a synchronization unit 5. The two pusher plates 3 are divided into a first pusher plate 301 and a second pusher plate 302. The first transmission unit 41 is connected to the first pusher plate 301, and the second transmission unit 42 is connected to the second pusher plate 302. The synchronization unit 5 includes a driving wheel 51 and a driven wheel 52 arranged at both ends corresponding to the moving strokes of the first transmission unit 41 and the second transmission unit 42, and a synchronizing member 53 connecting the driving wheel 51 and the driven wheel 52. The centering device 100 further includes a driving mechanism 7. The driving mechanism 7 is connected to the driving wheel 51 to transmit power. The first transmission unit 41 and the second transmission unit 42 are respectively connected to the synchronizing member 53 from different sides of the driving wheel 51 to perform synchronous actions. The synchronizing member 53 is connected to the driving wheel 51 and the driven wheel 52. The driving wheel 51 drives the driven wheel 52 through the synchronizing member 53. The first transmission unit 41 and the second transmission unit 42 are both connected to the same synchronizing member 53 to realize the movement of the first pusher plate 301 and the second pusher plate 302. Moreover, the synchronizing member 53 can also make the first transmission unit 41 and the second transmission unit 42 synchronously transmit, and at the same time ensure that the transmission amounts of the first transmission unit 41 and the second transmission unit 42 are the same, improving the centering accuracy of the battery swapping vehicle and facilitating the rapid centering of the battery swapping vehicle. When the driving wheel 51 rotates, the first transmission unit 41 and the second transmission unit 42 move synchronously. Only the driving wheel 51 provides power, and there is no need to set multiple power sources, simplifying the structural arrangement. In order to realize the first pusher plate 301 and the second pusher plate 302 moving in opposite directions and driving the wheels on both sides of the clamping lane, the first transmission unit 41 and the second transmission unit 42 are respectively connected to different sides of the synchronizing member 53, so as to realize the synchronous movement of the first pusher plate 301 and the second pusher plate 302 and make their moving directions opposite at the same time. Preferably, the synchronizing member 53 is a synchronous belt or a chain, and other components capable of realizing the synchronous movement of the first pusher plate 301 and the second pusher plate 302. The driving wheel 51 and the driven wheel 52 can be rollers or gears.

[0084] This embodiment also discloses a lift, which includes the centering device 100 as described above.

[0085] This embodiment also discloses a battery swapping station, which includes the lift as described above.

[0086] In the description herein, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0087] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A centering device is arranged on a vehicle-carrying platform and is used to perform centering adjustment on the position of an electricity-changing vehicle. It is characterized in that, The centering device is arranged in the lifting device of the vehicle-carrying platform and is correspondingly arranged relative to the space between two wheels at the same end of the battery-changing vehicle. Wheel limiting mechanisms that are recessed downward are respectively provided at both ends of the lifting device. The centering device includes: two push plates respectively arranged in the wheel limiting mechanisms and facing the inner walls of the corresponding wheels, and a transmission mechanism that connects the two push plates respectively to drive them to act synchronously to push against the wheels of the battery-changing vehicle. The two push plates are respectively movably arranged in the corresponding wheel limiting mechanisms through guiding mechanisms.

2. The centering device according to claim 1, characterized in that, The wheel limiting mechanism includes a base and two rows of rollers arranged side by side in a V shape on the upper surface of the base. The base includes two side plates for installing the rollers and a bottom plate that fixes the two side plates below the rollers. The push plate includes a plate piece located above the rollers and a sliding seat located below the rollers and used for fixing the plate piece. The sliding seat is movably arranged on the bottom plate through the guiding mechanism.

3. The centering device according to claim 2, wherein The base further includes two first reinforcing plates respectively connecting the ends of the two side plates and the bottom plate, and a second reinforcing plate that is arranged close to the push plate and connects the two first reinforcing plates. The second reinforcing plate is arranged parallel to the adjacent side plate. The sliding seat is movably arranged between the second reinforcing plate and the adjacent side plate.

4. The centering device according to claim 3, characterized in that The guiding mechanism includes a optical axis and a copper bushing. The two ends of the optical axis are respectively installed on the second reinforcing plate and the corresponding side plate, and the copper bushing is sleeved on the optical axis after passing through the sliding seat.

5. The centering device according to claim 4, characterized in that, At least one end face of the optical axis is provided with an anti-rotation boss.

6. The centering device according to claim 5, characterized in that, The number of the optical axis and the copper bushing is two, and they are arranged side by side at the two ends of the sliding seat.

7. The centering device according to claim 2, characterized in that, The two rows of rollers are arranged at intervals. The push plate further includes a transfer plate penetrating through the interval area. The transfer plate connects the plate piece and the sliding seat respectively. And / or, the push plate further includes a connecting plate fixed to one side of the sliding seat and facing the transmission mechanism. The connecting plate passes through the side plate and is connected to the transmission mechanism. And / or, the plate piece includes a support layer and a buffer layer connected to each other. The buffer layer is arranged on the side of the support layer close to the wheel.

8. The centering device according to any one of claims 1-7, characterized in that, The transmission mechanism includes a first transmission unit, a second transmission unit, and a synchronization unit. The two push plates are divided into a first push plate and a second push plate. The first transmission unit is connected to the first push plate, and the second transmission unit is connected to the second push plate. The synchronization unit includes a driving wheel and a driven wheel arranged at both ends corresponding to the moving strokes of the first transmission unit and the second transmission unit, and a synchronizing member that links the driving wheel and the driven wheel. The centering device further includes a driving mechanism, and the driving mechanism is connected to the driving wheel to transmit power. The first transmission unit and the second transmission unit are respectively connected to the synchronizing member on different sides of the driving wheel to act synchronously.

9. A lift, characterized in that, The lift includes the centering device according to any one of claims 1-8.

10. A power exchange station, characterized in that, The battery swapping station includes the lift according to claim 9.

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