A lifting device and a heavy truck battery swapping station

Abstract

The present invention discloses a lifting device and a heavy truck battery swapping station, including a connecting plate. A support column is fixedly connected to the lower end of the connecting plate. An annular groove is formed inside the lower end of the connecting plate. The end of the cross-shaped limiting rod away from the T-shaped column is slidably connected in the limiting groove. Limiting grooves are formed inside both sides of the connecting through hole. The upper end of the extrusion block is arranged in an inclined shape. The clamping hole is formed in the connecting hole. The sliding groove is formed inside the upper end of the pressing rod. The upper end of the sliding rod extends out of the sliding groove. A locking mechanism is arranged inside the lower end of the T-shaped column; by providing a plurality of groups of T-shaped columns, and a locking mechanism is arranged at the lower end of each group of T-shaped columns. The battery can be clamped through the locking mechanism. Control the connecting plate to rotate again, so that another group of T-shaped columns clamping new batteries moves above the electric truck. Through the lifting mechanism, the new battery falls above the electric truck, completing the replacement of the battery and improving the battery replacement efficiency of the electric heavy truck.

Description

Technical Field

[0001] The present invention relates to the technical field of battery swapping stations, and specifically to a lifting device and a heavy truck battery swapping station. Background Art

[0002] As disclosed in the Chinese patent with the publication number CN218879188U, it discloses a battery lifting mechanism for a heavy truck battery swapping station, which includes a lifting mounting plate, a lifting drive assembly, a steel cable tensioning wheel, and a lifting steel cable. One-way telescopic forklifts are provided on both sides of the lifting mounting plate. The lifting drive assembly drives the steel cable tensioning wheel to move reciprocally. The lifting steel cable is sleeved on the steel cable tensioning wheel. One end of the lifting steel cable is connected to a battery top lock, and the other end of the lifting steel cable is fixedly arranged.

[0003] However, the above solution has the following deficiencies: In the above patent, the battery is grabbed by a jaw mechanism, and the battery replacement is completed through a lifting mechanism and telescopic forklifts. However, it can only extract one battery at a time. When a large number of electric heavy trucks need to replace the battery, since the extraction mechanism in the battery swapping station can only grab one battery for replacement at a time, and after the replaced battery is put back into the charging station, it can only grab another battery to replace another vehicle. The replacement efficiency is slow, and it is impossible to grab multiple batteries at one time to replace the batteries of multiple electric trucks. Therefore, we have developed a lifting device and a heavy truck battery swapping station. Summary of the Invention

[0004] The purpose of the present invention is to provide a lifting device and a heavy truck battery swapping station to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A lifting device includes a connecting plate. A support column is fixedly connected to the lower end of the connecting plate. An annular groove is formed inside the lower end of the connecting plate. A connecting ring is slidably connected inside the annular groove. A transmission mechanism is provided inside the connecting ring. The connecting ring is driven to rotate along the annular groove through the transmission mechanism. A plurality of groups of connecting through holes are formed inside the upper end of the connecting ring. The plurality of groups of connecting through holes are arranged at equal intervals. A T-shaped column is slidably connected inside the connecting through hole. Cross-shaped limiting rods are movably connected inside both sides of the T-shaped column. The end of the cross-shaped limiting rod away from the T-shaped column is slidably connected inside a limiting groove. Limiting grooves are formed inside both sides of the connecting through hole;

[0007] A connecting hole is provided in the upper end of the T-shaped column, a connecting block is slidably connected in the connecting hole, a second spring is fixedly connected to the lower end of the connecting block, the other end of the second spring is fixedly connected to the connecting hole, extrusion blocks are fixedly connected to both sides of the connecting block, the upper end of the extrusion block is arranged in an inclined shape, the extrusion block is slidably connected in the guide groove, guide grooves are provided in both sides of the connecting hole, the cross-shaped limiting rod extends into the guide groove away from the limiting groove and contacts with the extrusion block, two groups of yielding grooves are provided in the upper end of the annular groove, a pressing rod is provided in the yielding groove, and the upper end of the pressing rod is fixedly connected to the lifting mechanism;

[0008] T-shaped clamping rods are movably connected to both sides of the pressing rod, and the clamping ends of the T-shaped clamping rods are arranged in an inclined shape. A clamping hole is provided on the upper side of the guide groove, and the clamping hole is opened in the connecting hole. The opposite ends of the two groups of T-shaped clamping rods are fixedly connected with pull ropes, and the pull rope extends into the slide groove away from the end of the T-shaped clamping rod and is fixedly connected to the sliding rod. The slide groove is opened in the upper end of the pressing rod, and the upper end of the sliding rod extends out of the slide groove. A locking mechanism is provided in the lower end of the T-shaped column.

[0009] Preferably, the transmission mechanism includes a gear ring, which is meshed with a gear on a side away from the connecting ring, and the gear is arranged in a connecting plate. The upper end of the gear is fixedly connected to the output end of the first motor, and the first motor is fixedly installed in the connecting plate.

[0010] Preferably, the cross-shaped limit rod is slidably connected in the limit cavity, the limit cavity is opened in the T-shaped column, and a first spring is sleeved on the outer side of the cross-shaped limit rod, one end of the first spring is fixedly connected to the limit cavity, and the other end is fixedly connected to the cross-shaped limit rod.

[0011] Preferably, the lifting mechanism includes two groups of traction ropes, one end of the two groups of traction ropes is fixedly connected to the pressing rod, and the other end extends out of the connecting plate and is fixedly wound around the outside of the take-up wheel, the take-up wheel is movably connected to the upper end of the connecting plate, a second motor is fixedly mounted on the upper end of the connecting plate, the output end of the second motor is fixedly connected to the take-up wheel, a return spring is sleeved on the outside of the two groups of traction ropes, and the lower end of the return spring is fixedly connected to the pressing rod.

[0012] Preferably, one end of the T-shaped clamping rod is slidably connected in the connecting cavity, the connecting cavity is opened in the pressing rod, a support spring is fixedly connected in the connecting cavity, and the other end of the support spring is fixedly connected to the T-shaped clamping rod.

[0013] Preferably, the locking mechanism includes two groups of T-shaped locking plates, and both sides of the T-shaped column are provided with a clearance cavity, one end of the T-shaped locking plate is slidably connected to the clearance cavity, a connecting spring is fixedly connected to the clearance cavity, and the other end of the connecting spring is fixedly connected to the T-shaped locking plate, and the opposite surfaces of the two groups of T-shaped locking plates are fixedly connected with connecting ropes, and one end of the connecting rope away from the T-shaped locking plate is fixedly connected to the output end of the telescopic cylinder, and the telescopic cylinder is fixedly installed in the T-shaped column.

[0014] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a heavy-duty truck battery swap station, including the lifting device described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting up several groups of T-shaped columns, and each group of T-shaped columns having a locking mechanism at the lower end, the battery can be clamped by the locking mechanism, and the lifting and lowering of the T-shaped columns holding the battery is controlled by the lifting mechanism, and the connecting plate is driven to rotate by the transmission mechanism, so that after one group of T-shaped columns grabs and lifts the old battery, the connecting plate is controlled to rotate again, so that another group of T-shaped columns holding the new battery moves to the top of the electric truck, and the new battery falls to the top of the electric truck through the lifting mechanism, completing the replacement of the battery, and when the next group of electric trucks moves to the bottom of the connecting plate, as the connecting plate rotates, another group of T-shaped columns will clamp and lift the old battery, and at the same time, the T-shaped columns holding the new battery will install the battery again, thereby improving the battery replacement efficiency of the electric heavy truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0017] Figure 2 It is a cross-sectional structural schematic diagram of the connection relationship between the pressing rod and the connecting hole of the present invention;

[0018] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 It is a schematic cross-sectional structural diagram of the extrusion block of the present invention in a state of extruding a cross-shaped limiting rod;

[0020] Figure 5 It is a cross-sectional structural schematic diagram of the connection relationship between the transmission mechanism and the connecting ring of the present invention;

[0021] Figure 6 It is a schematic cross-sectional view of the structure of the pressing rod of the present invention when it enters the yielding groove;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the connection relationship between the connecting ring and the gear ring of the present invention;

[0023] Figure 8It is a cross-sectional structural schematic diagram of the connection relationship between the locking mechanism and the battery of the present invention.

[0024] In the figure: 1, connecting plate; 2, connecting ring; 3, limiting groove; 4, limiting cavity; 5, sliding groove; 6, connecting block; 7, second spring; 8, T-shaped column; 9, T-shaped locking plate; 10, connecting hole; 11, extrusion block; 12, cross-shaped limiting rod; 13, first spring; 14, guide groove; 15, pressing rod; 16, sliding rod; 17, reset spring; 18, traction rope; 19, clamping hole; 20, T-shaped clamping rod; 21, connecting cavity; 22, pulling rope; 23, supporting spring; 24, annular groove; 25, telescopic cylinder; 26, giving way cavity; 27, connecting spring; 28, connecting rope; 29, battery; 30, locking ring; 31, gear ring; 32, connecting through hole; 33, giving way groove; 34, gear; 35, supporting column; 36, second motor; 37, take-up wheel; 38, first motor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-8 , the present invention provides a technical solution:

[0027] Embodiment 1:

[0028] A lifting device includes a connecting plate 1, the lower end of which is fixedly connected to a supporting column 35, and the connecting plate 1 can be installed together with a power exchange station through the supporting column 35. An annular groove 24 is provided in the lower end of the connecting plate 1, and a connecting ring 2 is slidably connected in the annular groove 24. A transmission mechanism is provided on the inner side of the connecting ring 2, and the connecting ring 2 is driven to rotate along the annular groove 24 through the transmission mechanism. A plurality of groups of connecting through holes 32 are provided in the upper end of the connecting ring 2, and the plurality of groups of connecting through holes 32 are arranged at equal intervals. A T-shaped column 8 is slidably connected in the connecting through hole 32, and a cross-shaped limiting rod 12 is movably connected in both sides of the T-shaped column 8. The cross-shaped limiting rod 12 is slidably connected in the limiting groove 3 at one end away from the T-shaped column 8. Limiting grooves 3 are provided on both sides of the connecting through hole 32, a connecting hole 10 is provided in the upper end of the T-shaped column 8, a connecting block 6 is slidably connected in the connecting hole 10, a second spring 7 is fixedly connected to the lower end of the connecting block 6, and the other end of the second spring 7 is fixedly connected to the connecting hole 10, and extrusion blocks 11 are fixedly connected on both sides of the connecting block 6, and the upper end of the extrusion block 11 is arranged in an inclined shape, and the extrusion block 11 is slidably connected in the guide groove 14. Under the elastic force of the second spring 7, the connecting block 6 bounces upward and drives the extrusion block 11 to move synchronously. When moving, the extrusion block 11 squeezes the cross-shaped limiting rod 12, so that the clamping end is inserted into the limiting groove 3, so that the T-shaped column 8 will not be separated from the connecting through hole 32;

[0029] Guide grooves 14 are provided on both sides of the connecting hole 10, and the cross-shaped limit rod 12 extends into the guide groove 14 away from the limit groove 3 at one end and contacts the extrusion block 11. Two sets of make-way grooves 33 are provided in the upper end of the annular groove 24, and a pressing rod 15 is provided in the make-way groove 33. The upper end of the pressing rod 15 is fixedly connected to the lifting mechanism. The second motor 36 is started to move the pressing rod 15 downward. Under the elastic force of the reset spring 17, the lower end of the pressing rod 15 will be inserted into the connecting hole 10. At this time, the connecting block 6 will be pressed to move downward. Under the elastic force of the first spring 13, the cross-shaped limit rod 12 will be separated from the limit groove 3. T-shaped clamping rods 20 are movably connected on both sides of the pressing rod 15. The clamping end of the T-shaped clamping rod 20 is arranged in an inclined shape. A snap-in hole 19 is provided on the upper side of the groove 14, and the snap-in hole 19 is opened in the connecting hole 10. The opposite ends of the two groups of T-shaped snap-in rods 20 are fixedly connected with pull ropes 22. The pull rope 22 extends into the slide groove 5 away from one end of the T-shaped snap-in rod 20 and is fixedly connected with the slide rod 16. The slide groove 5 is opened in the upper end of the pressing rod 15, and the upper end of the slide rod 16 extends out of the slide groove 5. When the pressing rod 15 enters the yield groove 33, at this time, as the pressing rod 15 continues to move upward, the slide rod 16 will be squeezed to move into the slide groove 5. During the movement, the slide rod 16 will pull the two groups of pull ropes 22, so that the T-shaped snap-in rod 20 is disengaged from the snap-in hole 19. A locking mechanism is provided in the lower end of the T-shaped column 8, and the two groups of locking rings 30 arranged on the upper end of the battery 29 are clamped by the locking mechanism.

[0030] Embodiment 2:

[0031] On the basis of Example 1, in order to enable the battery 29 in the battery swap station to be clamped, the transmission mechanism includes a gear ring 31, the gear ring 31 is meshed with a gear 34 away from the side of the connecting ring 2, the gear 34 is arranged in the connecting plate 1, and the upper end of the gear 34 is fixedly connected to the output end of the first motor 38, and the first motor 38 is fixedly installed in the connecting plate 1. When the pressing rod 15 enters the yield groove 33, at this time, as the pressing rod 15 continues to move upward, the sliding rod 16 will be squeezed to move into the sliding groove 5. During the movement, the sliding rod 16 will pull the two sets of pull ropes 22, so that the T-shaped clamping rod 20 is disengaged from the clamping hole 19, and the cross-shaped limiting rod 12 is slidably connected to the limiting cavity 4, and the limiting cavity 4 is opened in the T-shaped column 8. The outer side of the cross-shaped limiting rod 12 is sleeved with a first spring 13, and one end of the first spring 13 is fixedly connected to the limiting cavity 4, and the other end is fixedly connected to the cross-shaped limiting rod 12;

[0032] The lifting mechanism includes two groups of traction ropes 18, one end of the two groups of traction ropes 18 is fixedly connected to the pressing rod 15, and the other end extends out of the connecting plate 1 and is fixedly wound around the outside of the take-up wheel 37. The take-up wheel 37 is movably connected to the upper end of the connecting plate 1. A second motor 36 is fixedly installed on the upper end of the connecting plate 1. The output end of the second motor 36 is fixedly connected to the take-up wheel 37. A reset spring 17 is sleeved on the outer side of the two groups of traction ropes 18. The lower end of the reset spring 17 is fixedly connected to the pressing rod 15. The second motor 36 rotates to drive its output The take-up wheel 37 connected to the output end starts to rotate, and the take-up wheel 37 releases the traction rope 18 wound around its outside during rotation. After the traction rope 18 is released, the pressing rod 15 moves downward, and drives the T-shaped column 8 to move synchronously. When the lower end of the T-shaped column 8 contacts the upper end of the battery 29 in the battery swap station, the telescopic cylinder 25 is opened to move its output end outward. At this time, under the elastic force of the connecting spring 27, the T-shaped lock plate 9 moves outward along the give way cavity 26 and is clamped in the two sets of lock rings 30 at the upper end of the battery 29;

[0033] One end of the T-shaped clamping rod 20 is slidably connected inside the connecting cavity 21, the connecting cavity 21 is opened inside the pressing rod 15, a support spring 23 is fixedly connected inside the connecting cavity 21, and the other end of the support spring 23 is fixedly connected to the T-shaped clamping rod 20. The locking mechanism includes two groups of T-shaped lock plates 9. Yielding cavities 26 are opened on both sides inside the T-shaped column 8. One end of the T-shaped lock plate 9 is slidably connected inside the yielding cavity 26. A connecting spring 27 is fixedly connected inside the yielding cavity 26, and the other end of the connecting spring 27 is fixedly connected to the T-shaped lock plate 9. Connecting ropes 28 are fixedly connected to the opposite surfaces of the two groups of T-shaped lock plates 9. One end of the connecting rope 28 far from the T-shaped lock plate 9 is fixedly connected to the output end of the telescopic cylinder 25. The telescopic cylinder 25 is fixedly installed inside the T-shaped column 8. By opening the telescopic cylinder 25 to make its output end move outwards, at this time, under the elastic force of the connecting spring 27, the T-shaped lock plate 9 moves outwards along the yielding cavity 26 and is clamped inside the two lock rings 30 at the upper end of the battery 29, so that the T-shaped column 8 can lift the battery 29 when moving upwards. By opening the telescopic cylinder 25 to make its output end move inwards and drive the two connecting ropes 28 to move synchronously, the T-shaped lock plate 9 is disengaged from the lock ring 30, and the clamping of the battery 29 can be cancelled.

[0034] In addition, to achieve the above object, the present invention also provides a heavy truck battery swapping station, including the above-mentioned lifting device

[0035] Working principle: When in use, the connecting plate 1 and the battery swapping station can be installed together through the support column 35. Control the left second motor 36 to rotate to drive the wire reel 37 connected to its output end to start rotating. When the wire reel 37 rotates, the traction rope 18 wound around its outer side is released. After the traction rope 18 is released, the pressing rod 15 moves downwards and drives the T-shaped column 8 to move synchronously. When the lower end of the T-shaped column 8 contacts the upper end of the battery 29 inside the battery swapping station, at this time, open the telescopic cylinder 25 to make its output end move outwards. At this time, under the elastic force of the connecting spring 27, the T-shaped lock plate 9 moves outwards along the yielding cavity 26 and is clamped inside the two lock rings 30 at the upper end of the battery 29. After the clamping is completed, control the second motor 36 to rotate in the reverse direction, so that the wire reel 37 winds up the traction rope 18. At this time, the T-shaped column 8 clamping the battery 29 is pulled to move upwards. When the pressing rod 15 enters the yielding groove 33, at this time, as the pressing rod 15 continues to move upwards, the sliding rod 16 will be squeezed and move into the sliding groove 5;

[0036] During the movement of the sliding rod 16, the two pulling ropes 22 will be pulled, so that the T-shaped clamping rod 20 is disengaged from the clamping hole 19. At this time, the T-shaped column 8 moves downwards under its own gravity, and at the same time, under the elastic force of the second spring 7, the connecting block 6 bounces upwards and drives the extrusion block 11 to move synchronously. When the extrusion block 11 moves, it squeezes the cross-shaped limiting rod 12, so that the clamping end is inserted into the limiting groove 3, so that the T-shaped column 8 will not be disengaged from the connecting through hole 32;

[0037] At this time, the first motor 38 can be turned on to drive the gear 34 connected to its output end to start rotating. Since the gear 34 meshes with the toothed ring 31, during the rotation of the gear 34, the connecting ring 2 will be driven to rotate synchronously. When the second set of T-shaped columns 8 move to the position of the left pressing rod 15, the second motor 36 will not control the pressing rod 15 to move downward, so that the lower end of the second set of T-shaped columns 8 will not clamp the battery 29. When the third set of T-shaped columns 8 move to the position of the left pressing rod 15, the second motor 36 starts again at this time, causing the pressing rod 15 to move downward. Under the elastic force of the return spring 17, the lower end of the pressing rod 15 will be inserted into the connection hole 10. At this time, the connecting block 6 will be pressed to move downward. Under the elastic force of the first spring 13, the cross-shaped limiting rod 12 will disengage from the limiting groove 3. Since the upper end of the connection hole 10 is inclined, during the process of the pressing rod 15 being inserted into the connection hole 10, the T-shaped clamping rod 20 will enter the connection cavity 21. After the T-shaped clamping rod 20 moves to the position of the clamping hole 19, at this time, under the elastic force of the support spring 23, the T-shaped clamping rod 20 is clamped into the clamping hole 19. At this time, the T-shaped column 8 can be moved downward to clamp the battery 29, so that there is one set of T-shaped columns 8 that do not clamp the battery 29 between every two sets of T-shaped columns 8;

[0038] When the battery 29 of the electric truck needs to be replaced, the electric truck is driven to the lower part of the right pressing rod 15 at this time. By rotating the connecting plate 1, the T-shaped column 8 that does not clamp the battery 29 is moved above the battery 29 of the electric truck. At this time, under the elastic force of the return spring 17, the pressing rod 15 is inserted into the connection hole 10. The second motor 36 is used to move the T-shaped column 8 above the battery 29 of the electric truck to clamp it. After the clamping is completed, the T-shaped column 8 returns to its original position. At this time, the right pressing rod 15 returns to its original position. The connecting plate 1 is controlled to move the T-shaped column 8 clamping the new battery 29 to the position of the electric truck. By rotating the second motor 36, the new battery 29 can be installed on the electric truck. As the connecting plate 1 rotates continuously, the old battery 29 will move to the position of the left pressing rod 15. The old battery 29 can be sent into the battery swapping station through the second motor 36 on the left, and the new battery 29 can be grabbed.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting device, comprising a connecting plate, the lower end of which is fixedly connected to a supporting column, characterized in that: An annular groove is provided in the lower end of the connecting plate, a connecting ring is slidably connected in the annular groove, a transmission mechanism is provided on the inner side of the connecting ring, and the connecting ring is driven to rotate along the annular groove by the transmission mechanism, a plurality of groups of connecting through holes are provided in the upper end of the connecting ring, and the plurality of groups of connecting through holes are arranged at equal intervals, a T-shaped column is slidably connected in the connecting through hole, and a cross-shaped limiting rod is movably connected in both sides of the T-shaped column, and one end of the cross-shaped limiting rod away from the T-shaped column is slidably connected in the limiting groove, and limiting grooves are provided in both sides of the connecting through hole; A connecting hole is provided in the upper end of the T-shaped column, a connecting block is slidably connected in the connecting hole, a second spring is fixedly connected to the lower end of the connecting block, the other end of the second spring is fixedly connected to the connecting hole, extrusion blocks are fixedly connected to both sides of the connecting block, the upper end of the extrusion block is arranged in an inclined shape, the extrusion block is slidably connected in the guide groove, guide grooves are provided in both sides of the connecting hole, the cross-shaped limiting rod extends into the guide groove away from the limiting groove and contacts with the extrusion block, two groups of yielding grooves are provided in the upper end of the annular groove, a pressing rod is provided in the yielding groove, and the upper end of the pressing rod is fixedly connected to the lifting mechanism; T-shaped clamping rods are movably connected to both sides of the pressing rod, and the clamping ends of the T-shaped clamping rods are arranged in an inclined shape. A clamping hole is provided on the upper side of the guide groove, and the clamping hole is opened in the connecting hole. The opposite ends of the two groups of T-shaped clamping rods are fixedly connected with pull ropes, and the pull rope extends into the slide groove away from the end of the T-shaped clamping rod and is fixedly connected to the sliding rod. The slide groove is opened in the upper end of the pressing rod, and the upper end of the sliding rod extends out of the slide groove. A locking mechanism is provided in the lower end of the T-shaped column.

2. A lifting device according to claim 1, characterized in that: The transmission mechanism includes a gear ring, which is meshed with a gear on a side away from the connecting ring. The gear is arranged in a connecting plate, and the upper end of the gear is fixedly connected to the output end of the first motor, and the first motor is fixedly installed in the connecting plate.

3. A lifting device according to claim 1, characterized in that: The cross-shaped limiting rod is slidably connected in the limiting cavity, the limiting cavity is opened in the T-shaped column, and a first spring is sleeved on the outer side of the cross-shaped limiting rod. One end of the first spring is fixedly connected to the limiting cavity, and the other end is fixedly connected to the cross-shaped limiting rod.

4. A lifting device according to claim 1, characterized in that: The lifting mechanism includes two groups of traction ropes, one end of the two groups of traction ropes is fixedly connected to the pressing rod, and the other end extends out of the connecting plate and is fixedly wound around the outside of the take-up wheel. The take-up wheel is movably connected to the upper end of the connecting plate, and a second motor is fixedly installed on the upper end of the connecting plate. The output end of the second motor is fixedly connected to the take-up wheel. A return spring is sleeved on the outside of the two groups of traction ropes, and the lower end of the return spring is fixedly connected to the pressing rod.

5. A lifting device according to claim 1, characterized in that: One end of the T-shaped clamping rod is slidably connected in the connecting cavity, the connecting cavity is opened in the pressing rod, a supporting spring is fixedly connected in the connecting cavity, and the other end of the supporting spring is fixedly connected to the T-shaped clamping rod.

6. A lifting device according to claim 1, characterized in that: The locking mechanism includes two groups of T-shaped lock plates, and both sides of the T-shaped column are provided with a clearance cavity. One end of the T-shaped lock plate is slidably connected to the clearance cavity, and a connecting spring is fixedly connected to the clearance cavity. The other end of the connecting spring is fixedly connected to the T-shaped lock plate. The opposite surfaces of the two groups of T-shaped lock plates are fixedly connected to connecting ropes. The end of the connecting rope away from the T-shaped lock plate is fixedly connected to the output end of the telescopic cylinder, and the telescopic cylinder is fixedly installed in the T-shaped column.

7. A heavy truck battery swap station, characterized in that: A lifting device comprising any one of claims 1 to 6.

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