Lifting machine and battery replacing platform comprising same

Abstract

The lifting machine comprises a base and a liftable platform, wheel limiting mechanisms are arranged at the two ends of the platform respectively, the two wheel limiting mechanisms are arranged in a downwards-concave mode so that a containing space can be formed between the two wheel limiting mechanisms, the lifting machine further comprises a detection unit arranged in the containing space, and the detection unit is connected with the detection unit. The detection device is used for detecting the lifting height of the platform. The detection unit is arranged to detect the whole process when the platform moves upwards or downwards, and the platform is prevented from continuously moving in time, so that the use safety and the structural reliability of the lifting machine are improved, and the battery replacement efficiency is improved. Besides, compared with a mode of arranging the detection unit at the bottom of the platform, the detection unit is arranged in the accommodating space, so that the occupied space of the platform in the vertical direction can be reduced, the accommodating space is reasonably utilized, the detection unit is convenient to maintain, the position of the detection platform is more accurate and is not influenced by the external environment such as dust, and the detection unit is prevented from losing efficacy.

Description

Technical Field

[0001] The present invention relates to a lift and a battery swapping platform including the same. Background Art

[0002] In recent years, new energy vehicles have developed rapidly. Electric vehicles relying on storage batteries as the driving energy have the advantages of zero emissions and low noise. As the market share and usage frequency of electric vehicles are also increasing, lifts for replacing batteries of electric vehicles for battery swapping models are becoming more and more popular. The lift is provided with a platform for carrying the wheels of the electric vehicle. A hydraulic cylinder and a base are provided below the platform. Driven by the hydraulic cylinder, the platform raises or lowers the height of the electric vehicle to facilitate battery replacement. Specifically, when the hydraulic rod of the hydraulic cylinder extends to the limit position, the platform is driven by the hydraulic cylinder to be lifted to the upper limit position; when the hydraulic rod of the hydraulic cylinder retracts to the limit position, the platform is driven by the hydraulic cylinder to be lowered to the lower limit position. In the prior art, generally, sensors are arranged on the ground below the lift to detect the lifting height of the platform and achieve control of its lifting. However, this method requires additional installation structures and installation spaces for the sensors, and the structure is complex; moreover, due to the influence of the external environment below the lift, such as dust, it is easy to cause inaccurate detection. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects that the sensor for detecting the lifting height in the prior art is complex and has a poor detection effect, and to provide a lift and a battery swapping platform including the same.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A lift, the lift includes a base and a liftable platform. Wheel limiting mechanisms are respectively arranged at both ends of the platform. The two wheel limiting mechanisms are recessed to form an accommodation space therebetween. The lift further includes a detection unit arranged in the accommodation space for detecting the lifting height of the platform.

[0006] In this solution, by arranging the detection unit to detect the whole process when the platform moves upward or downward, when the platform descends to the lower limit position, the detection unit timely prevents it from continuing to descend, avoiding damage to the platform caused by collision with the base, thereby improving the use safety and structural reliability of the lift and enhancing the battery swapping efficiency. In addition, the detection unit is arranged in the accommodation space. Compared with the method of arranging it at the bottom of the platform, it can reduce the space occupied by the platform in the vertical direction, rationally utilize the accommodation space, make the detection unit easy to maintain, the detection of the platform position more accurate and not affected by the external environment, such as dust, and prevent the detection unit from failing.

[0007] Preferably, the platform includes a base, mounting seats formed at both ends of the base for mounting the wheel limiting mechanism, and a bottom plate that seals the space between the two mounting seats and the base at the bottom end to form the accommodating space, and the detection unit is fixed on the bottom plate.

[0008] In this solution, through the above settings, the detection unit is arranged inside the platform to avoid the risk of possible collision with the base when the detection unit is arranged at the bottom of the platform. During the descent of the platform, the detection unit can move with the platform, thereby improving the ranging accuracy and avoiding the situation of inaccurate ranging caused by the independent arrangement of the detection unit relative to the platform.

[0009] Preferably, a cover plate is further provided on the top surface of the accommodating space to seal the accommodating space.

[0010] In this solution, by providing the cover plate, it is possible to prevent sundries from entering the accommodating space and affecting the detection effect of the detection unit. Correspondingly, after the cover plate seals the accommodating space, it can also carry objects or operators. At the same time, setting the cover plate can facilitate the maintenance of other structures arranged in the accommodating space and improve the convenience of maintenance.

[0011] Preferably, the lift further includes a scissor mechanism connected between the base and the platform. The detection unit is arranged on the bottom plate in the edge area close to the base and faces the base to detect the fixing member between the scissor mechanism and the base.

[0012] In this solution, through the above settings, the detection unit can detect the fixed area of the base during operation, avoiding the situation where the platform cannot be stopped in time due to the change of the detection object during the descent of the platform, and improving the reliability of the lift.

[0013] Preferably, the fixing member is a partial area of the cross beam of the base.

[0014] In this solution, through the above settings, it is possible to avoid the situation where the detection is affected when other areas of the base are blocked by the scissor mechanism or other structures, and stop the platform from descending in time.

[0015] Preferably, a detection hole is formed on the bottom plate. The detection unit is fixed on the upper surface of the bottom plate through a bracket, and the detection head of the detection unit is arranged in the detection hole.

[0016] In this solution, by providing the detection hole, the way of extending the detection unit into the detection hole reduces the space occupied by the detection unit in the vertical direction in the accommodating space. At the same time, the detection unit is supported by the bracket to avoid the detection unit from shaking due to the descent of the platform and improve the detection accuracy.

[0017] Preferably, a limiting unit is further provided on the base. The limiting unit is located on the outer peripheral side of the scissor mechanism, and the top of the limiting unit is used to contact and limit the platform.

[0018] In this solution, by providing the limiting unit, when the detection unit fails, the descending platform can be limited to avoid damage caused by the collision between the platform and the base. Moreover, the limiting unit located on the outer peripheral side of the scissor mechanism can ensure the stability and balance of the platform after it descends, avoiding a series of problems caused by local inclination of the platform.

[0019] Preferably, the limiting unit includes a sleeve and a buffer member located at the top end of the sleeve and used to abut against the bottom of the platform. The sleeve accommodates the buffer member through a groove so that the top end of the sleeve abuts against the platform.

[0020] In this solution, by providing the buffer member, when the descending platform is supported at the top of the sleeve, the stability after contacting the platform can be improved to avoid the situation of the platform shaking after descending. The buffer member can also provide a force for moving in the lifting direction to assist in lifting the platform when the platform needs to rise, thereby reducing the instantaneous pressure at the initial stage of lifting and the response time when the platform rises, and improving the use efficiency of the lift. The buffer member can be compressed into the groove to support the descending platform through the top height of the sleeve, avoiding the buffer member alone bearing the gravity of the descending platform and improving the repeated use rate of the lift.

[0021] Preferably, the buffer member is made of a non-metallic material that deforms when the platform is squeezed.

[0022] In this solution, through the above setting, the non-metallic buffer member can be smoothly compressed into the groove, and then the bottom of the platform is limited by the top of the sleeve.

[0023] A battery swapping platform, which includes the lift as described above.

[0024] In this solution, the battery swapping platform includes the above lift. After the battery swapping vehicle is lifted, during the descending process of the platform, the detection unit can timely detect the position of the platform, and prevent the platform from continuing to descend when the platform descends to the lower limit position, avoiding the collision between the platform and the base, and improving the use safety and repeated use rate of the lift and the battery swapping platform.

[0025] The positive and progressive effects of the present invention are as follows: By providing a detection unit to detect the entire process when the platform moves upward or downward, when the platform descends to the lower limit position, the detection unit promptly stops its further descent, avoiding damage caused by the collision between the platform and the base, thereby improving the use safety and structural reliability of the lift and enhancing the battery swapping efficiency. Additionally, the detection unit is arranged in the accommodation space. Compared with the method of arranging it at the bottom of the platform, it can reduce the space occupied in the vertical direction of the platform, reasonably utilize the accommodation space, facilitate the maintenance of the detection unit, make the detection of the platform position more accurate and not affected by the external environment, such as dust, and prevent the detection unit from failing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 1 is a schematic structural view of a lift according to a preferred embodiment of the present invention.

[0027] Figure 2 FIG. 2 is a schematic structural view of a detection unit according to a preferred embodiment of the present invention.

[0028] Figure 3 FIG. 3 is a schematic structural view of a scissor mechanism according to a preferred embodiment of the present invention.

[0029] Figure 4 FIG. 4 is a schematic structural view of a limit unit according to a preferred embodiment of the present invention.

[0030] Figure 5 FIG. 5 is a schematic view of the positional relationship between a bottom plate and a detection hole according to a preferred embodiment of the present invention.

[0031] DESCRIPTION OF REFERENCE NUMERALS:

[0032] Platform 1

[0033] Base 11

[0034] Mounting seat 12

[0035] Bottom plate 13

[0036] Detection hole 131

[0037] Hydraulic cylinder 2

[0038] Base 3

[0039] Fixing member 31

[0040] Wheel limit mechanism 4

[0041] Detection unit 5

[0042] Cover plate 6

[0043] Scissor mechanism 7

[0044] Bracket 8

[0045] Limit unit 9

[0046] Sleeve 91

[0047] Buffer member 92 Specific implementation manner

[0048] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the described embodiments for this reason.

[0049] This embodiment provides a lift, as Figure 1 and Figure 2 shown. The lift includes a base 3 and a liftable platform 1. Wheel limiting mechanisms 4 are respectively provided at both ends of the platform 1. The two wheel limiting mechanisms 4 are recessed to form an accommodation space therebetween. The lift further includes a detection unit 5 provided in the accommodation space. The detection unit 5 is used to detect the lifting height of the platform 1.

[0050] Specifically, the platform 1 is of a rectangular structure and is arranged in the horizontal direction. The platform 1 has a top surface and a bottom surface. The bottom surface faces the base 3, and the wheel limiting mechanism 4 is provided on the top surface. The wheel limiting mechanism 4 is provided near the end of the top surface of the platform 1 along the length direction and the wheel limiting mechanism 4 is recessed from the top surface to accommodate the wheels of the battery swapping vehicle and position the wheels. At this time, the platform 1 moves upward or downward in the vertical direction to drive the battery swapping vehicle to move and perform battery pack replacement, that is, the platform 1 moves between the upper limit position and the lower limit position in the vertical direction. It should be noted that when the platform 1 is at the upper limit position, it is in the direction away from the base 3, and when the platform is at the lower limit position, it is in the direction close to the base 3. In addition, an accommodation space is further formed on the platform 1 between the two relatively arranged wheel limiting mechanisms 4. The accommodation space is located between the top surface and the bottom surface of the platform 1 and a detection unit 5 is provided in the accommodation space. The detection unit 5 correspondingly detects the distance between the platform 1 and the base 3 during the movement process to realize the detection of the lifting height of the platform 1. When the detection unit 1 detects that the platform 1 moves to the limit distance, the structure for driving the lifting of the platform 1 is closed in time to prevent the platform 1 from continuing to move, so as to detect the whole process of the movement of the platform 1 and avoid the platform 1 continuing to move from the limit position and damaging the structure for driving the lifting of the platform 1.

[0051] Taking the platform 1 moving towards the base 3 to the lower limit position as an example for description, when the platform 1 moves towards the base 3 and the height of the platform 1 decreases in the vertical direction, the detection unit 5 prevents the platform 1 from continuing to descend when the platform 1 reaches the lower limit position, thereby avoiding the risk of possible collision between the platform 1 and the base 3 when the platform 1 continues to descend, and at the same time protecting the driving structure and avoiding damage caused by excessive internal pressure thereof, so as to improve the use safety and structural reliability of the lift.

[0052] In this embodiment, the detection unit 5 is disposed in the accommodation space instead of on the top or bottom surface of the platform 1, so as to avoid possible collision of the detection unit 5 with the base 3 or the battery swapping platform during the movement of the platform 1. Compared with the way of being disposed on the base 3, on the one hand, it can reduce the space occupation in the vertical direction of the platform 1, lower the height of the platform 1 itself, so as to rationally utilize the accommodation space, make the detection unit 5 located in the accommodation space easy to maintain, the position detection of the platform 1 more accurate and not affected by the external environment, such as dust. On the other hand, it can avoid the collision of the detection unit 5 with the base 3 when the platform 1 approaches the base 3, and prevent the detection unit 5 from failing after being damaged.

[0053] In this embodiment, the platform 1 includes a base 11, mounting seats 12 formed at both ends of the base 11 and used for mounting the wheel limiting mechanism 4, and a bottom plate 13 that seals the space between the two mounting seats 12 and the base 11 at the bottom end to form an accommodation space. The detection unit 5 is fixed on the bottom plate 13.

[0054] Specifically, the base 11 is disposed in the horizontal direction and is consistent with the height of the platform 1. The base 11 is a rectangular frame and extends along the length direction of the platform 1. Mounting seats 12 are provided at both ends of the base 11. The mounting seats 12 are disposed in the vertical direction and extend from the width direction of the platform 1. The mounting seats 12 are consistent with the height of the platform 1. The mounting seats 12 are flat plates and are welded to the base 11. Thus, an accommodation space is formed by enclosing the base 11 and the mounting seats 12. The wheel limiting mechanism 4 is fixedly connected to the side of the mounting seat 12 facing away from the accommodation space. The bottom plate 13 is provided at the bottom of the accommodation space. The bottom plate 13 is located on the bottom surface of the platform 1 and is flush with the bottom surface of the platform 1 to close the bottom of the accommodation space through the bottom plate 13. The detection unit 5 is disposed on the bottom plate 13 and on the surface of the bottom plate 13 away from the base 3. By fixedly connecting the detection unit 5 with the bottom plate 13, the detection unit 5 can move along with the platform 1 during the descent of the platform 1, thereby improving the ranging accuracy and avoiding the situation of inaccurate ranging caused by the independent setting of the detection unit 5 relative to the platform 1.

[0055] In this embodiment, a cover plate 6 is further provided on the top surface of the accommodation space to seal the accommodation space.

[0056] Specifically, the bottom of the accommodation space is sealed by the bottom plate 13, which effectively supports the detection unit 5 while preventing debris between the platform 1 and the base 3 from extending into the sealed space during the descent of the platform 1 and affecting the detection effect of the detection unit 5. Correspondingly, the top surface of the accommodation space is sealed by setting a cover plate 6 to completely seal the accommodation space where the detection unit 5 is provided, preventing debris from entering from the top of the accommodation space and affecting the detection effect. The cover plate 6 is a flat plate and is connected to the base 11 by bolts. By setting the cover plate 6 and the base 11 to be detachably connected, operators can timely open the cover plate 6 and maintain the faulty structure when there is a fault in the detection unit 5 or other structures in the accommodation space, improving the convenience of maintenance.

[0057] In this embodiment, the lift also includes a scissor mechanism 7 connected between the base 3 and the platform 1. The detection unit 5 is arranged on the bottom plate 13 in the edge area near the base 11 and faces the base 3 to detect the fixing member 31 located between the scissor mechanism 7 and the base 3.

[0058] Specifically, the scissor mechanism 7 is located between the platform 1 and the base 3, and the scissor mechanism 7 is located in the middle area of the base 3. The first leg and the second leg of the scissor mechanism 7 are respectively connected to the base 3, and the third leg and the fourth leg of the scissor mechanism 7 are connected to the side of the bottom plate 13 facing the base 3 to support the platform 1 through the scissor mechanism 7. The third leg and the fourth leg are both arranged close to the mounting seat 12. Fixing members 31 are arranged between the first leg and the second leg and the edge of the base 3. A hydraulic cylinder 2 is arranged on the scissor mechanism 7. The hydraulic cylinder 2 is communicated with an external hydraulic source. When the extending end of the hydraulic cylinder 2 extends, it pushes the third leg and the fourth leg to move upward in the vertical direction, and then the platform 1 moves upward in the vertical direction. Similarly, when the extending end of the hydraulic cylinder 2 contracts, the platform 1 moves downward in the vertical direction, that is, the platform 1 descends. The detection unit 5 arranged on the side of the bottom plate 13 away from the base 3 is arranged close to the edge of the base 11 and corresponds to the fixing member 31 along the projection direction, so that the detection unit 5 is spaced from the third leg and the fourth leg, avoiding the detection end of the detection unit 5 from identifying the third leg and the fourth leg when detecting the distance between the platform 1 and the base 3, and being able to accurately detect the fixing member 31 at the same time, enabling the detection unit 5 to detect the corresponding fixed area of the base 3 during operation, and avoiding the situation where the detection object changes during the descent of the platform 1 and the platform 1 cannot be stopped in time, improving the reliability of the lift and the detection accuracy of the detection unit 5.

[0059] In this embodiment, the fixing member 31 is a partial area of the cross beam of the base 3.

[0060] Specifically, the base 3 includes multiple cross beams to improve the structural stability of the base 3 by increasing the cross beams. The fixing member 31 is a partial area of the cross beam corresponding to the detection unit 5. The detection unit 5 does not need to detect the entire cross beam, but is used to detect the distance between the fixing member 31 and the platform 1 in the corresponding area when the platform 1 descends in the vertical direction. The fixing member 31 remains fixed in a proper position due to its own structural characteristics to ensure the detection accuracy of the detection unit 5 during detection.

[0061] As Figure 3 and Figure 5 shown, in this embodiment, a detection hole 131 is formed in the bottom plate 13. The detection unit 5 is fixed to the upper surface of the bottom plate 13 through a bracket 8, and the detection head of the detection unit 5 is arranged in the detection hole 131.

[0062] Specifically, a detection hole 131 is arranged near the edge of the base 11 on the bottom plate 13. The detection hole penetrates the bottom plate 13 and is arranged corresponding to the fixing member 31. A bracket 8 is arranged on one side of the detection hole 131, and the bracket 8 is located on the surface of the bottom plate 13 away from the base 3. The bracket 8 is of an "L" - shaped structure, and one end of the "L" - shaped structure is arranged in the vertical direction. The detection unit 5 is a laser rangefinder in the prior art. The laser rangefinder and the hydraulic cylinder 2 are both electrically connected to the main control board to timely transmit the data measured by the laser rangefinder to the main control board and close the hydraulic cylinder 2 through the main control board, so that even if the platform 1 continues to descend. The main control board is a structure in the prior art and will not be elaborated here. The laser rangefinder is bolt - connected to the end of the bracket 8 arranged in the vertical direction. The detection head of the laser rangefinder extends into the detection hole 131 and is arranged towards the fixing member 31. By extending the detection head into the detection hole 131, the space occupied by the detection unit 5 in the vertical direction in the accommodation space is reduced. At the same time, the detection unit 5 is supported by the bracket 8 to avoid the detection unit 5 from shaking due to the descent of the platform 1 and improve the detection accuracy.

[0063] As Figure 3 and Figure 4 shown, in this embodiment, a limiting unit 9 is further arranged on the base 3. The limiting unit 9 is located on the outer peripheral side of the scissor mechanism 7, and the top of the limiting unit 9 is used to contact and limit the platform 1.

[0064] Specifically, the top height of the limiting unit 9 is set to be higher than the height of the base 3. Thus, during the descent of the platform 1, when the detection unit 5 fails and the platform 1 continues to descend, the platform 1 is limited by the limiting unit 9 to prevent it from descending, avoiding the collision between the platform 1 and the base 3 and preventing damage to the base 3 and the hydraulic cylinder 2.

[0065] The limiting unit 9 is arranged on the outer peripheral sides of the first and second legs of the scissor mechanism 7 to avoid interference with the scissor mechanism 7. At the same time, a plurality of limiting units 9 are arranged on the outer peripheral side of the scissor mechanism 7 to ensure the stability and balance after the platform 1 descends, and avoid a series of problems caused by local inclination of the platform 1.

[0066] In this embodiment, the limiting unit 9 includes a sleeve 91 and a buffer member 92 located at the top end of the sleeve 91 and used for abutting against the bottom of the platform 1. The sleeve 91 accommodates the buffer member 92 through a groove, so that the top end of the sleeve 91 abuts against the platform 1.

[0067] Specifically, the sleeve 91 is of a cylindrical structure and the top height of the sleeve 91 is higher than the height of the base 3. A groove is provided at the top of the sleeve 91 for accommodating the buffer member 92 provided at the top of the sleeve 91. It can be understood that when the buffer member 92 is not in contact with the bottom of the platform 1, the buffer member 92 is not compressed by a force. At this time, the buffer member 92 is located at the top of the sleeve 91 rather than in the groove. When the platform 1 descends and contacts the buffer member 92, the buffer member 92 buffers the platform 1 to reduce the acting force when the platform 1 descends, and the buffer member 92 contracts and shrinks into the groove due to being compressed. At this time, the top of the sleeve 91 limits and supports the platform 1 to prevent the platform 1 from continuing to descend. By providing the buffer member 92, when supporting the descended platform 1 at the top of the sleeve 91, the stability after contacting the platform 1 is improved, and the situation of shaking of the platform 1 after descending is avoided. The buffer member 92 can be compressed into the groove to support the descending platform 1 through the top height of the sleeve 91, avoiding the buffer member 92 alone bearing the acting force of the descending platform 1 and improving the repeated utilization rate of the lift.

[0068] Moreover, the buffer member 92 has a restoring elastic force due to being compressed, so that when the platform 1 ascends, the buffer member 92 can also provide a force for moving along the lifting direction to assist in lifting the platform 1 when the platform 1 needs to ascend, thereby reducing the instantaneous pressure at the initial stage of lifting and the response time when the platform 1 ascends, and improving the use efficiency of the lift.

[0069] In other embodiments, sleeves 91 are also arranged in the edge area of the base 3 to disperse the acting force received by the sleeves 91 by increasing the number of sleeves 91 and avoid stress concentration. It can be understood that since the sleeves 91 arranged in the edge area of the base 3 are far from the scissor mechanism 7, and the sleeves 91 far from the scissor mechanism 7 are not provided with buffer members 92, the cost of the lift can be reduced while ensuring the auxiliary lifting of the platform 1.

[0070] In this embodiment, the buffer member 92 is made of a non-metallic material that deforms when the platform 1 presses it.

[0071] Specifically, the buffer member 92 is of a cylindrical structure, and the material of the buffer member 92 is nylon. The nylon material itself has the characteristics of being compressible and generating elastic force after reset. Thus, the top of the sleeve 91 limits the bottom of the platform 1. Using a non-metallic material can, on the one hand, save the cost of the lift, and on the other hand, the deformable non-metallic material can be reset in time when the platform 1 rises, avoiding damage caused by the compression of rigid structures, and improving the reusable rate and service life.

[0072] In other embodiments, the material of the buffer member 92 can also be polyurethane. The polyurethane material itself also has the characteristics of being compressible and generating elastic force after reset. Thus, the top of the sleeve 91 limits the bottom of the platform 1. The polyurethane material is a material in the prior art and will not be elaborated here.

[0073] In another embodiment, the buffer member 92 can also be a spring. The spring can also be compressed into the groove and provide elastic force when the platform 1 rises. This is the prior art and will not be elaborated here.

[0074] This embodiment also provides a battery swapping platform, which includes the above-mentioned lift.

[0075] Specifically, the battery swapping platform includes the above-mentioned lift, so as to detect the relative distance between the platform 1 and the base 3 in real time through the detection unit 5 during the whole process of the lift moving up or down, avoiding damage to the hydraulic cylinder 2 caused by the platform 1 continuing to move from the limit position, improving the service life of the hydraulic cylinder 2 and extending its maintenance cycle. Through the mutual cooperation of the limiting unit 9 and the detection unit 5, when the detection unit 5 fails, the limiting unit 9 can prevent the platform 1 from continuing to descend. The limiting unit 9 and the detection unit 5 form a double guarantee to avoid collision between the platform 1 and the base 3, and improve the use safety and reusable rate of the lift and the battery swapping platform.

[0076] 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. 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 lift, the lift comprising a base and a liftable platform, wherein wheel limiting mechanisms are respectively provided at both ends of the platform, characterized in that, The two wheel limiting mechanisms are recessed to form a receiving space therebetween, and the lift further includes a detection unit disposed in the receiving space for detecting the lifting height of the platform.

2. The lift according to claim 1, characterized in that, The platform includes a base, mounting seats formed at both ends of the base for mounting the wheel limiting mechanisms, and a bottom plate that seals the space between the two mounting seats and the base at the bottom to form the receiving space, and the detection unit is fixed to the bottom plate.

3. The lift according to claim 2, characterized in that, A cover plate is further provided on the top surface of the receiving space to seal the receiving space.

4. The lift according to claim 2, characterized in that, The lift further includes a scissor mechanism connected between the base and the platform, and the detection unit is disposed on the bottom plate in a region near the edge of the base and faces the base to detect a fixing member located between the scissor mechanism and the base.

5. The lift according to claim 4, characterized in that, The fixing member is a partial region of the cross beam of the base.

6. The lift according to claim 5, characterized in that, A detection hole is formed in the bottom plate, the detection unit is fixed to the upper surface of the bottom plate through a bracket, and the detection head of the detection unit is disposed in the detection hole.

7. The lift according to claim 4, characterized in that, A limiting unit is further provided on the base, the limiting unit is located on the outer peripheral side of the scissor mechanism, and the top of the limiting unit is used to contact and limit the platform.

8. The lift according to claim 7, characterized in that, The limiting unit includes a sleeve and a buffer member located at the top end of the sleeve and used to abut against the bottom of the platform, and the sleeve accommodates the buffer member through a groove so that the top end of the sleeve abuts against the platform.

9. The lift according to claim 8, characterized in that, The buffer member is made of a non-metallic material that deforms when the platform presses it.

10. A battery swapping platform, characterized in that, The battery swapping platform includes the lift according to any one of claims 1-9.

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