A lifting device suitable for hydrogen energy heavy truck top lifting tank and a control method thereof

Abstract

The application provides a lifting appliance suitable for hydrogen energy heavy truck top lifting tank replacement and a control method thereof, relates to the technical field of vehicle battery replacement equipment, and comprises a lifting plate connected with a gantry crane, wherein a tension detector is arranged on the lifting plate; a supporting piece is in sliding connection with the lifting plate, the supporting piece can abut against a tank rack, and a positioning piece can slide relative to the supporting piece when the positioning piece abuts against a tank groove top surface platform. The problems that a hydrogen replacement station is unattended, the placement of a hydrogen tank in a tank groove in a truck cannot be observed by human beings, and the hydrogen tank cannot be accurately placed in a new energy vehicle battery storage space during replacement due to unclear identification and inaccurate alignment during tank replacement are solved.

Description

Technical Field

[0001] This application relates to the technical field of vehicle battery swapping equipment, and in particular to a lifting device and its control method suitable for top-mounted tank swapping of hydrogen fuel cell heavy trucks. Background Technology

[0002] Considering factors such as the complexity of the manufacturing process, the maturity of the equipment, and the cost of use, most new energy battery-swapping vehicles adopt a top-mounted battery swapping method. The batteries used in these vehicles are large and heavy, thus requiring specialized lifting equipment for fast, reliable, and safe battery swapping.

[0003] However, there is currently no dedicated overhead crane for battery swapping in mining new energy vehicles. Traditional roadside battery swapping cranes mostly use hydraulic or starter cylinder locking structures. This structure requires an additional power source input, and the alignment is adjusted manually by operating the power source. Since most hydrogen swapping stations are unattended, it is impossible to manually observe the placement of the hydrogen tank in the tank compartment inside the truck. During the tank swapping process, unclear identification and inaccurate alignment are prone to occur, resulting in the hydrogen tank not being accurately placed in the battery storage space of the new energy vehicle during the replacement process. Summary of the Invention

[0004] The purpose of this application is to provide a lifting device and its control method suitable for hydrogen tank replacement on the roof of a hydrogen-powered heavy-duty truck, in order to solve the problems in related technologies where hydrogen replacement stations are unattended, making it impossible to manually observe the placement of hydrogen tanks in the tank compartment inside the truck, and where unclear identification and inaccurate alignment are prone to occur during the tank replacement process, resulting in the hydrogen tanks not being accurately placed in the empty battery compartment of the new energy vehicle during the replacement process.

[0005] Firstly, the lifting device provided in this application for tank replacement on the top of a hydrogen fuel cell heavy-duty truck adopts the following technical solution: A lifting device suitable for tank replacement on a top-mounted crane of a hydrogen fuel cell heavy-duty truck, including A suspended platform, which is connected to the gantry crane, is equipped with a tension detector; A support member is slidably connected to the hanging plate and is capable of abutting against the tank rack. The positioning member is such that when it abuts against the top platform of the tank, the support member can slide relative to the positioning member.

[0006] By adopting the above technical solution, the gantry crane is connected to the entire lifting device. The gantry crane drives the lifting plate to move, and the lifting plate drives the support and positioning components to move. When the positioning component moves to abut against the top platform of the tank tank, the positioning component stops moving in the vertical direction. The support component moves in the vertical direction relative to the positioning component, causing the tank rack that abuts against the positioning component to fall into the tank tank. After the tank rack is placed into the tank tank on the truck, the support component moves horizontally relative to the positioning component, and the support component disengages from the tank rack, so that the entire lifting device can detach from the tank rack.

[0007] During the positioning process, inaccurate placement of the positioning components may occur, leading to misalignment of the tank rack. If the tank rack is not accurately aligned with the tank compartment, it may tilt, causing the hydrogen tank to fall. Positioning components are installed on the sides of the support structure. The tank rack has four sides, with four positioning components. When one positioning component is too far from the tank compartment, the positioning component on the other side will fall into the compartment. When the positioning components on the other sides abut against the top platform of the tank compartment, the component that fell into the compartment has no relative abutment and will move into the compartment along with the support structure. At this time, the positioning component on this side is subjected to pressure from the tank rack. The tension detector on the lifting platform detects the difference in tension, and the gantry crane can move the entire lifting device towards the side of the pressured positioning component. This solves the problem of unattended hydrogen exchange stations, where it is impossible to manually observe the placement of hydrogen tanks in the tank compartment inside the truck, and the problem of unclear identification and inaccurate alignment during the tank exchange process, leading to the hydrogen tank not being accurately placed in the battery compartment of the new energy vehicle.

[0008] Optionally, a first groove is formed on the support member, and the hanging plate is slidably connected to the first groove.

[0009] By adopting the above technical solution, the hanging plate is slidably connected to the first groove on the support, so that the lateral movement of the support is not affected by the hanging plate.

[0010] Optionally, the support member is provided with a slider, and the positioning member has a second sliding groove, with the slider slidably connected to the second sliding groove.

[0011] By adopting the above technical solution, the slider on the support moves relative to the second groove on the positioning member, enabling the support to move vertically relative to the positioning member.

[0012] Optionally, the second slide groove includes a second horizontal groove and a second vertical groove, the second horizontal groove and the second vertical groove are interconnected and perpendicular to each other, the slider includes a second horizontal block and a second vertical block, the second horizontal block and the second vertical block are fixedly connected and perpendicular to each other, the second vertical block is slidably connected to the second vertical groove, and the second horizontal block is slidably connected to the second horizontal groove.

[0013] By adopting the above technical solution, the second vertical block is slidably connected to the second vertical groove, and the second horizontal block is slidably connected to the second horizontal groove, so that the support member can move vertically relative to the positioning member.

[0014] Optionally, the positioning member has a through hole, which is connected to and perpendicular to the second sliding groove, and the support member can be slidably connected to the through hole.

[0015] By adopting the above technical solution, the support can be slidably connected to the through hole, and the through hole can accommodate the support, allowing the support to slide relative to the through hole and detach the support from the can rack.

[0016] Optionally, it also includes a connecting rod, wherein a through groove is formed on the support member, the through groove is located below the first sliding groove and is separated from the first sliding groove, the connecting rod passes through the through groove, and the connecting rods are connected to each other.

[0017] By adopting the above technical solution, the connecting rods are connected to each other to form a rectangular frame, so that the support plates in each direction can move relative to the connecting rods in a direction perpendicular to the connecting rods.

[0018] Optionally, it may also include a first connector that connects the hanging plate to the connecting rod.

[0019] By adopting the above technical solution, the first connector connects the hanging plate and the connecting rod, enabling the connecting rod to always move together with the hanging plate.

[0020] Optionally, a second connector is also included. A third sliding groove is formed on the positioning member. The third sliding groove is parallel to and separated from the second sliding groove. The second connector is slidably connected to the third sliding groove and fixedly connected to the hanging plate.

[0021] By adopting the above technical solution, one end of the second connecting member is fixedly connected to the hanging plate, and the other end is slidably connected to the positioning member, so that the horizontal distance between the hanging plate and the positioning member remains unchanged when the hanging plate moves vertically relative to the positioning member.

[0022] Optionally, it may also include an elastic element that connects the connecting rod to the sidewall of the through groove.

[0023] By adopting the above technical solution, the elastic element connects the connecting rod and the side wall of the through groove, and the elastic element can drive the support to move relative to the connecting rod.

[0024] Secondly, the control method for a top-mounted tank-changing lifting device for hydrogen fuel cell heavy-duty trucks provided in this application adopts the following technical solution: including the following steps: S1: The gantry crane moves the hanging plate, which in turn moves the support components. The support components abut against the bottom of the horizontal bar above the tank rack, which in turn moves the tank rack containing hydrogen tanks. S2: When the positioning component abuts against the top surface of the tank, the support component begins to move downward; S3: When the support component moves down to the bottom of the tank rack, the lifting plate remains stationary. The support component moves relative to the lifting plate, causing the support component to detach from the tank rack. This allows the gantry crane to lift the entire lifting device off the tank rack and the truck.

[0025] By adopting the above technical solution, after the gantry crane carries the tank rack into the tank tank, the support component can automatically detach from the tank rack, thereby detaching the entire lifting device from the truck.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. During the positioning process, if one side of the positioning plate is misplaced and the tank rack is not accurately aligned with the tank compartment, the positioning plate on that side will fall into the tank compartment. As the lifting platform moves downward relative to the positioning plate, the positioning plate on the side above the tank compartment moves downward with the lifting platform. At this time, the pressure on the support plate is unbalanced, and the tension on one side of the lifting platform increases. The tension detector on the lifting platform detects that the tension is too high, and the gantry crane can drive the entire lifting device to move towards the side with greater pressure detected by the tension detector until the tension on all four lifting platforms is the same. This solves the problem of unattended hydrogen exchange stations, where it is impossible to manually observe the placement of hydrogen tanks in the tank compartment inside the truck, and the problem of unclear identification and inaccurate alignment during the tank exchange process, which leads to the hydrogen tank not being accurately placed in the battery compartment of the new energy vehicle during the replacement process.

[0027] 2. As the support component moves the tank rack downwards, the support component can automatically detach from the tank rack under the elastic action of the spring, thereby detaching the entire lifting device from the truck. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of this application; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 This is a cross-sectional schematic diagram of an embodiment of this application; Figure 4 for Figure 3 A magnified view of part B in the diagram.

[0029] In the picture: 10. Hanging platform; 11. Tension detector; 12. First horizontal block; 20. Support component; 21. Support plate; 22. First slide groove; 221. First horizontal groove; 222. First vertical groove; 23. Slider; 24. Through groove; 30. Positioning component; 31. Positioning plate; 32. Second slide groove; 321. Second horizontal groove; 322. Second vertical groove; 33. Through hole; 34. Third slide groove; 40. Connecting rod; 50. First connector; 51. Connecting bend; 60. Second connector; 61. Connecting block; 70. Elastic component; 71. Spring; 80. Tank; 90. Gantry crane; 100. Can rack. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.

[0031] This application discloses a lifting device and its control method suitable for top-mounted tank replacement of hydrogen-powered heavy trucks.

[0032] Example 1 Reference Figure 1 The system includes a tank trough 80, a gantry crane 90, and a tank rack 100. The tank trough 80 is located inside the truck, which is used to place the tank rack 100 containing hydrogen tanks. The gantry crane 90 moves the tank rack 100 into the tank trough 80 of the truck.

[0033] Combination Figure 1 and Figure 2 A lifting device suitable for top-mounted tank changing on hydrogen fuel cell heavy-duty trucks includes a lifting plate 10, a support member 20, a positioning member 30, a connecting rod 40, a first connecting member 50, a second connecting member 60, and an elastic member 70. The lifting plate 10 is located below a gantry crane 90 and is connected to the gantry crane 90. The support member 20 is located below the lifting plate 10 and is vertically arranged relative to the lifting plate 10. The lifting plate 10 can slide relative to the support member 20. The support member 20 can abut against the bottom of the horizontal bar located above the tank rack 100. A tension detector 11 is provided on the lifting plate 10. The positioning member 30 is located to the side of the support plate 21 and is parallel to the lifting plate 10. When the positioning member 30 abuts against the top platform of the tank trough 80, the support member 20 can slide longitudinally relative to the positioning member 30.

[0034] The gantry crane 90 is connected to the entire lifting device. The gantry crane 90 moves the lifting plate 10, and the lifting plate 10 moves the support member 20 and the positioning member 30. When the positioning member 30 moves to abut against the top platform of the tank trough 80, the positioning member 30 stops moving in the vertical direction. The support member 20 moves in the vertical direction relative to the positioning member 30, causing the tank rack 100, which abuts against the positioning member 30, to fall into the tank trough 80. After the tank rack 100 is placed into the tank trough 80 on the truck, the support member 20 moves horizontally relative to the positioning member 30, and the support member 20 disengages from the tank rack 100, so that the entire lifting device can disengage from the tank rack 100.

[0035] The positioning component 30 can be a positioning plate 31. The width of each positioning plate 31 is smaller than the edge width of the tank trough 80 to which it is placed. During the positioning process of the positioning component 30, the positioning component 30 may be misplaced, causing the tank rack 100 to be misplaced. If the tank rack 100 is not accurately aligned with the tank trough 80, the tank rack 100 may tilt, causing the hydrogen tank to fall. Positioning elements 30 are installed on the side of the support member 20. The tank rack 100 has four sides, and four positioning elements 30 are installed. When one side of the positioning element 30 is too far from the tank trough 80, the positioning element 30 on the other side will fall into the tank trough 80. When the positioning elements 30 on the other side abut against the top platform of the tank trough 80, the positioning element 30 that has fallen into the tank trough 80 has no relative abutment effect and will move into the tank trough 80 along with the support member 20. At this time, the positioning element 30 on this side is subjected to the pressure of the tank rack 100. The tension detector 11 on the lifting plate 10 detects that the tension is too large, and the gantry crane 90 can drive the entire lifting device to move towards the side of the pressured positioning element 30. This solves the problem of unattended hydrogen exchange stations, where it is impossible to observe the placement of hydrogen tanks in the tank trough 80 inside the truck, and the problem of unclear identification and inaccurate alignment during the tank exchange process, which leads to the hydrogen tank not being accurately placed in the battery storage space of the new energy vehicle during the replacement process.

[0036] Reference Figure 3 and Figure 4 The support member 20 is plate-shaped, and the hanging plate 10 is located above the support member 20. The support member 20 has a first sliding groove 22. The hanging plate 10 is slidably connected to the first sliding groove 22. The specific structure of the first sliding groove 22 and the hanging plate 10 and their connection relationship are as follows: A first horizontal block 12 is provided below the hanging plate 10. The first sliding groove 22 includes a first horizontal groove 221 and a first vertical groove 222. The first horizontal groove 221 and the first vertical groove 222 are interconnected and perpendicular to each other. The hanging plate 10 is slidably connected to the first vertical groove 222, and the first horizontal block 12 is slidably connected to the first horizontal groove 221.

[0037] The upper part of the hanging plate 10 is connected to the gantry crane 90 and cannot change its position in the horizontal direction. The first sliding groove 22 is opened on the support member 20 so that the hanging plate 10 can move in the horizontal direction relative to the hanging plate 10. When the tank rack 100 falls into the tank trough 80, it is necessary to separate the support member 20 from the tank rack 100. The support member 20 is moved laterally. The first sliding groove 22 in the support member 20 slides relative to the hanging plate 10. The hanging plate 10 cannot move in the horizontal direction and will not interfere with the movement of the support member 20.

[0038] Reference Figure 3 and Figure 4The positioning component 30 is located on the side of the support component 20 and is arranged parallel to the lifting rod. The positioning component 30 has a second sliding groove 32. The support component 20 is provided with a slider 23, which is slidably connected to the second sliding groove 32. The specific structure of the second sliding groove 32 and the slider 23 and their connection relationship are as follows: The second sliding groove 32 includes a second horizontal groove 321 and a second vertical groove 322. The second horizontal groove 321 and the second vertical groove 322 are interconnected and perpendicular to each other. The slider 23 includes a second horizontal block and a second vertical block. The second horizontal block and the second vertical block are fixedly connected and perpendicular to each other. The second vertical block is slidably connected to the second vertical groove 322, and the second horizontal block is slidably connected to the second horizontal groove 321.

[0039] The support member 20 can be a support plate 21. When the positioning plate 31 abuts against the platform above the tank 80, the support plate 21 can move vertically relative to the positioning plate 31, so that the support plate 21 moves downward under the drive of the hanging plate 10, and drives the tank rack 100 to move downward and fall into the tank 80.

[0040] Reference Figure 3 and Figure 4 The bottom of the positioning plate 31 has a through hole 33 that is connected to and perpendicular to the second sliding groove 32. The through hole 33 can accommodate the support member 20 so that the support member 20 is slidably connected to the through hole 33.

[0041] After the can rack 100 falls into the tank trough 80, the bottom of the can rack 100 is supported by the bottom of the tank trough 80. There is no pressure between the can rack 100 and the support plate 21. After the support plate 21 slides vertically relative to the positioning plate 31 to the bottom of the positioning plate 31, the support plate 21 can be separated from the can rack 100 through the through hole 33 at the bottom of the positioning plate 31, which facilitates the subsequent separation of the entire lifting device from the can rack 100.

[0042] Reference Figure 1 and Figure 2 A third slide groove 34 is provided on the positioning plate 31. The third slide groove 34 is parallel to and separated from the second slide groove 32. One end of the second connector 60 is fixedly connected to the hanging plate 10, and the other end is slidably connected to the third slide groove 34.

[0043] The second connecting piece 60 can be a connecting block 61. When the positioning plate 31 abuts against the top platform of the tank 80, the hanging plate 10 slides relative to the positioning plate 31. At this time, the connecting block 61 slides in the third sliding groove 34, and the distance between the hanging plate 10 and the positioning plate 31 does not change.

[0044] Reference Figure 1 and Figure 2A through groove 24 is opened on the support plate 21 along the horizontal direction. The through groove 24 is located below the first slide groove 22 and is separated from the first slide groove 22. The connecting rod 40 passes through the through groove 24 and is connected to each other. The elastic element 70 is located between the connecting rod 40 and the side wall of the through groove 24. The elastic element 70 connects the connecting rod 40 and the side wall of the through groove 24. The first connecting member 50 is located between the hanging plate 10 and the positioning plate 31. The first connecting member 50 connects the positioning plate 31 and the connecting rod 40.

[0045] The elastic element 70 can be a spring 71, and the first connecting element 50 can be a connecting rod 51, which connects the hanging plate 10 and the positioning plate 31.

[0046] There are four connecting rods 40, which are perpendicular to each other and connected to each other. The connecting rods 40 pass through the through slot 24. At this time, the spring 71 is in a compressed state. When the hanging plate 10 moves down relative to the positioning plate 31 so that the support plate 21 corresponds to the through hole 33, the positioning plate 31 is fixedly connected to the hanging plate 10 through the first connecting piece 50. The hanging plate 10 does not move in the horizontal direction. Under the elastic action of the spring 71, the support plate 21 passes through the through hole 33, so that the support plate 21 is separated from the can rack 100.

[0047] Meanwhile, if the tank rack 100 is not properly aligned and one or more positioning plates 31 fall into the tank trough 80, the tank rack 100 will slightly tilt as the lifting plate 10 continues to move downward. At this time, the pressure on the support plate 21 on the tilted side of the tank rack 100 will increase, causing the connecting bent rod 51 to exert a pulling force on one side of the lifting plate 10. When an unbalanced pressure is detected on a certain side of the lifting plate 10, the gantry crane 90 can move the entire lifting device towards the side of the pressure positioning plate 31.

[0048] The implementation principle of a lifting device applicable to top-mounted tank changing for hydrogen-powered heavy trucks in this embodiment is as follows: The gantry crane 90 is connected to the entire lifting device. The gantry crane 90 drives the lifting plate 10 to move, and the lifting plate 10 drives the support plate 21 and the positioning plate 31 to move. When the positioning plate 31 moves to abut against the top platform of the tank trough 80, the positioning plate 31 no longer moves in the vertical direction, and the support plate 21 moves relative to the positioning plate 31 in the vertical direction, causing the tank rack 100 that abuts against the positioning plate 31 to fall into the tank trough 80.

[0049] During the positioning process of the positioning plate 31, if one side of the positioning plate 31 is not placed accurately and the tank rack 100 is not aligned with the tank trough 80, the positioning plate 31 on that side will fall into the tank trough 80 accordingly. As the lifting plate 10 moves downward relative to the positioning plate 31, the positioning plate 31 on the side above the tank trough 80 moves downward with the lifting plate 10. At this time, the pressure on the support plate 21 is unbalanced, and the tension on one side of the lifting plate 10 increases. The tension detector 11 on the lifting plate 10 detects that the tension is too large, and the gantry crane 90 can drive the entire lifting device to move towards the side where the tension detector 11 detects greater pressure until the tension on all four lifting plates 10 is the same.

[0050] When the positioning plate 31 is accurately positioned and the tension on the four lifting plates 10 is the same, the positioning plate 31 abuts against the top platform of the tank trough 80, the lifting plates 10 move downwards, the support plate 21 moves downwards, and the connecting rod 40, which is fixedly connected to the lifting plates 10 through the connecting bent rod 51, moves downwards. During the downward movement of the support plate 21, the distance between the lifting plates 10 and the positioning plate 31 remains constant due to the connecting block 61, and the spring 71, located between the connecting rod 40 and the through groove 24 in the support plate 21, is always in a compressed state. When the support plate 21 moves to the position corresponding to the through hole 33 on the positioning plate 31, the lifting plates 10 and the connecting rod 40 remain stationary, and the support plate 21 moves into the through hole 33 under the elastic action of the spring 71, causing the support plate 21 to detach from the tank rack 100. The gantry crane 90 can then detach the entire lifting device from the tank rack 100 and from the truck.

[0051] Example 2 Reference Figure 3 and Figure 4 A control method for a top-mounted crane for tank changing on a hydrogen fuel cell heavy-duty truck. The difference between this embodiment and Embodiment 1 is that it includes the following steps: S1: The gantry crane 90 drives the lifting plate 10 to move, the lifting plate 10 drives the support 20 to move, and the support 20 abuts against the bottom of the horizontal bar above the tank rack 100, which can drive the tank rack 100 loaded with hydrogen tanks to move. S2: When the positioning part 30 abuts against the top surface of the tank 80, the support part 20 begins to move downward; S3: When the support member 20 moves down to the bottom of the tank rack 100 and falls into the tank trough 80, the lifting plate 10 remains stationary. The support member 20 moves relative to the lifting plate 10 to disengage from the tank rack 100, thereby causing the gantry crane 90 to pull the entire lifting device away from the tank rack 100 and the truck.

[0052] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lifting device suitable for top-mounted tank changing on hydrogen-powered heavy-duty trucks, comprising a tank trough (80), a gantry crane (90), and a tank rack (100), characterized in that, Also includes: A hanging plate (10) is connected to the gantry crane (90), and a tension detector (11) is provided on the hanging plate (10). A support member (20) is slidably connected to the hanging plate (10) and can abut against the can rack (100); a first sliding groove (22) is provided on the support member (20) and the hanging plate (10) is slidably connected to the first sliding groove (22); a through groove (24) is provided on the support member (20) and the through groove (24) is located below the first sliding groove (22) and is separated from the first sliding groove (22); A connecting rod (40) passes through the through groove (24) and the connecting rods (40) are connected to each other; An elastic element (70) connects the connecting rod (40) to the side wall of the through groove (24); The first connector (50) connects the hanging plate (10) and the connecting rod (40). A positioning element (30) is disposed on the side of the support element (20) and is adapted to the periphery of the can rack (100); when the positioning element (30) abuts against the top platform of the can groove (80), the support element (20) can slide relative to the positioning element (30); a second sliding groove (32) is provided on the positioning element (30), and a slider (23) is provided on the support element (20) and slidably connected to the second sliding groove (32); a through hole (33) is provided on the positioning element (30), the through hole (33) is interconnected with the second sliding groove (32) and is arranged perpendicularly, and the support element (20) can be slidably connected to the through hole (33); a third sliding groove (34) is provided on the positioning element (30), the third sliding groove (34) is parallel to the second sliding groove (32) and is separated from each other; The second connector (60) is slidably connected to the third slide groove (34) and fixedly connected to the hanging plate (10).

2. The lifting device for top-mounted tank changing of hydrogen fuel cell heavy-duty trucks according to claim 1, characterized in that, The second slide (32) includes a second horizontal groove (321) and a second vertical groove (322). The second horizontal groove (321) and the second vertical groove (322) are connected to each other and perpendicular to each other. The slider (23) includes a second horizontal block and a second vertical block. The second horizontal block and the second vertical block are fixedly connected and perpendicular to each other. The second vertical block is slidably connected to the second vertical groove (322), and the second horizontal block is slidably connected to the second horizontal groove (321).

3. A control method for a lifting device suitable for top-mounted tank changing on a hydrogen fuel cell heavy-duty truck, comprising the lifting device described in any one of claims 1-2, characterized in that, Includes the following steps: S1: The gantry crane (90) drives the lifting plate (10) to move, the lifting plate (10) drives the support (20) to move, the support (20) abuts against the bottom of the horizontal bar above the tank rack (100), and can drive the tank rack (100) loaded with hydrogen tanks to move; S2: When the positioning part (30) abuts against the top surface of the tank (80), the support part (20) begins to move downward; S3: When the support member (20) moves down to the bottom of the tank rack (100) and falls into the tank trough (80), the lifting plate (10) remains stationary. The support member (20) moves relative to the lifting plate (10) to disengage the support member (20) from the tank rack (100), thereby causing the gantry crane (90) to carry the entire lifting device away from the tank rack (100) and away from the truck.

Images