Auxiliary pipe replacing device
By designing the pipe replacement auxiliary device of the support seat and lifting mechanism, the problems of inconvenience, high cost and high risk of quartz tube replacement in solar cell production are solved, and the safe and convenient replacement of quartz tubes are achieved, reducing labor costs and operation Danger.
Patent Information
- Application Number
- CN202420097565.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-15
AI Technical Summary
During the solar cell production process, the replacement of quartz tubes is inconvenient, high cost and high risk. It is mainly due to its large diameter, long length and heavy weight, which requires multiple people to lift, which increases labor costs and operation risks.
A pipe replacement auxiliary device including a support seat and a lifting mechanism is designed. The support seat is equipped with a horizontal storage slot and a communication opening. The lifting mechanism is used to adjust the height of the support seat so that the quartz tube can be stored horizontally and lifted safely, reducing labor demand. , reduce operational risks.
It realizes convenient replacement of quartz tubes, reduces labor costs and operating risks, and improves the safety and efficiency of replacement.
Smart Images

Figure CN222244580U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of solar cell production, and specifically relates to a tube replacement auxiliary device. Background Art
[0002] In the production process of solar cells, many tubular equipment are needed, such as front boron expansion, back boron expansion, phosphorus expansion, LPCVD (Low Pressure Chemical Vapor Deposition), front and back film tubular PECVD, etc. The reaction chambers of these processes are all tubular quartz tubes. Since these processes are thermal processes with the highest temperature reaching over 1000℃, the life of the quartz tubes after repeated high temperatures is relatively short. Therefore, the quartz tubes need to be replaced regularly to maintain the stability of the process.
[0003] At present, the replacement of quartz tubes is mainly done manually. Since the quartz tubes are large in diameter, long in length, and heavy in weight, multiple people are required to lift the quartz tubes each time the tubes are replaced, which increases the labor cost of tube replacement. In addition, since the furnace chambers of the equipment for manufacturing solar cells are stacked, the height of the top furnace chamber is relatively high. Each time a replacement is performed, the operator needs to stand at a high place (such as a high ladder or a work platform) while lifting the quartz tubes to perform the operation, which is very dangerous.
[0004] Therefore, in the prior art, there are problems in the production process of solar cells, such as the quartz tube is inconvenient to replace, the replacement cost is high, and the risk is high. Utility Model Content
[0005] The purpose of the embodiment of the present application is to provide a tube replacement auxiliary device, which can solve the problems in the related art that quartz tubes are difficult to replace, have high replacement costs and are highly dangerous during the production process of solar cells.
[0006] The present application provides a tube replacement auxiliary device, comprising:
[0007] A support seat, wherein the support seat is provided with a horizontally extending storage groove and an opening connected to the storage groove, wherein the storage groove is used to store the quartz tube, and the quartz tube can slide out of the storage groove through the opening;
[0008] The lifting mechanism is connected to the support base and is used to drive the support base to rise and fall.
[0009] In the embodiment of the present application, the tube replacement auxiliary device includes a support seat and a lifting mechanism, the support seat is provided with a storage slot and an opening connected to the storage slot, the storage slot is used to store quartz tubes, the storage slot is horizontally arranged, so that the quartz tubes can be horizontally arranged on the support seat, and the lifting mechanism is used to drive the support seat to rise and fall, and the height of the quartz tube in the storage slot can be adjusted as needed. When performing the tube replacement operation, the quartz tube to be replaced can be placed in the storage slot of the support seat first, and then the height of the support seat is adjusted by the lifting mechanism, so that the quartz tube moves to the same height as the furnace chamber inlet of the equipment for making solar cells, and then the quartz tube is pushed so that the quartz tube slides out of the storage slot through the opening and enters the furnace chamber, and the replacement of the quartz tube can be completed. In this way, there is no need for multiple people to lift the quartz tube, and the manpower required for installation is less, which can reduce the physical exertion of personnel and reduce the labor cost, and the operator does not need to stand at a high place to carry the quartz tube to work, which improves the convenience of tube replacement and reduces the danger of the operator's operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the tube replacement auxiliary device disclosed in the embodiment of the present application.
[0011] Description of reference numerals:
[0012] 100-quartz tube; 200-mobile vehicle; 300-lifting mechanism; 400-support seat;
[0013] 310- bottom bracket; 320- top bracket; 330- scissor assembly; 340- telescopic drive member;
[0014] 311 - slide slot; 331 - first connecting rod; 332 - second connecting rod; 341 - second roller;
[0015] 410 - storage slot; 420 - first roller; 430 - first brake member; 440 - second brake member;
[0016] 411 - first opening; 412 - second opening. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.
[0018] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.
[0019] The pipe replacement auxiliary device provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.
[0020] refer to Figure 1 , a tube replacement auxiliary device provided in an embodiment of the present application may include a support seat 400 and a lifting mechanism 300. The support seat 400 may be provided with a storage slot 410 and an opening. The storage slot 410 is used to store the quartz tube 100. The storage slot 410 may extend horizontally, so that the quartz tube 100 may be in a horizontal state, thereby preventing the quartz tube 100 from falling during movement or lifting. And the opening is connected to the storage slot 410, and the quartz tube 100 may slide out of the storage slot 410 through the opening, so that it is convenient for the quartz tube 100 to slide into the furnace chamber. In addition, the lifting mechanism 300 may be connected to the support seat 400 and used to drive the support seat 400 to rise and fall, so that the quartz tube 100 may be raised and lowered, and the height of the quartz tube 100 in the storage slot 410 may be adjusted as needed, so that the quartz tube 100 may be raised to the corresponding furnace chamber.
[0021] When performing the tube replacement operation, the quartz tube 100 to be replaced can be placed in the storage slot 410 of the support seat 400 first, and then the height of the support seat 400 can be adjusted by the lifting mechanism 300 to move the quartz tube 100 to the same height as the furnace chamber entrance of the equipment for manufacturing solar cells, and then the quartz tube 100 can be pushed to slide out of the storage slot 410 through the opening and enter the furnace chamber, and the replacement of the quartz tube 100 can be completed. In this way, there is no need for multiple people to lift the quartz tube 100, and less manpower is required for installation, which can reduce the physical exertion of the operator and the labor cost. In addition, the operator does not need to stand at a high place to carry the quartz tube 100 to work, which improves the convenience of tube replacement and reduces the danger of the operator's operation.
[0022] It should be noted that the above-mentioned equipment for manufacturing solar cells may be a diffusion machine.
[0023] In an optional embodiment, the storage tank 410 may be an arc-shaped tank, and the shape of the arc-shaped tank may match the quartz tube 100. Specifically, the storage tank 410 may be a semicircular structure, and after the quartz tube 100 is placed in the storage tank 410, the quartz tube 100 and the storage tank 410 are coaxial.
[0024] Optionally, the length of the storage tank 410 can be consistent with the length of the quartz tube 100, or the length of the storage tank 410 can be greater than the length of the quartz tube 100, and the storage tank 410 can only store one quartz tube 100, thus avoiding the situation where multiple quartz tubes 100 collide with each other and are damaged during the lifting process.
[0025] Of course, the storage slot 410 can also store multiple quartz tubes 100. In this case, multiple storage slots 410 corresponding to the quartz tubes 100 can be set on the support base 400 to improve the transportation efficiency.
[0026] In an optional embodiment, the opening may include a first opening 411 and a second opening 412, that is, two openings may be provided on the support seat 400, and the first opening 411 and the second opening 412 may be respectively located at two ends of the storage tank 410 along its own length direction, and the first opening 411 and the second opening 412 may both be connected to the storage tank 410. In this way, the quartz tube 100 in the storage tank 410 may slide out of the storage tank 410 through the first opening 411 or the second opening 412, and when performing a tube replacement operation, the quartz tube 100 may slide out through the opening opposite to the furnace chamber, without adjusting the direction of the tube replacement auxiliary device, which is conducive to simplifying the tube replacement operation.
[0027] In other embodiments, the support base 400 may be provided with only one opening, and the quartz tube 100 can only slide out of the storage tank 410 through the opening.
[0028] In an optional embodiment of the present application, at least one first roller 420 may be provided on the support seat 400, at least a portion of the first roller 420 may be located in the storage tank 410, and at least a portion of the first roller 420 may contact the quartz tube 100 to assist the quartz tube 100 in sliding toward the opening. In this way, the quartz tube 100 is convenient to move in the storage tank 410, thereby saving the operator's physical strength when performing a tube replacement operation.
[0029] In other embodiments, the first roller 420 is not disposed on the support base 400 .
[0030] In an optional embodiment, the first roller 420 is rotatably disposed in the storage groove 410 , that is, the first roller 420 can roll in the storage groove 410 , so that the first roller 420 can drive the quartz tube 100 to move, thereby facilitating the quartz tube 100 to slide out of the storage groove 410 .
[0031] In another embodiment, a fixing groove may be provided on the support seat 400, and the first roller 420 may be rotatably provided in the fixing groove, and part of the first roller 420 is located in the storage groove 410, and part of the first roller 420 is in contact with the quartz tube 100. In this way, the rotation of the first roller 420 may assist the movement of the quartz tube 100, thereby facilitating the quartz tube 100 to slide out of the storage groove 410.
[0032] In an optional embodiment of the present application, at least one brake member may be provided on the support base 400, and the brake member may be used to limit the rotation or rolling of the first roller 420. In this way, the quartz tube 100 and the support base 400 may be relatively fixed by limiting the first roller 420 by the brake member, and the quartz tube 100 may be prevented from sliding or even slipping out of the storage slot 410 during the process of the lifting mechanism 300 driving the support base 400 to lift.
[0033] Of course, the support base 400 may not be provided with a brake component, and the quartz tube 100 is fixed relatively to the support base 400 only by gravity.
[0034] Optionally, the support base 400 may be provided with a first roller 420 and a brake member, and the brake member may limit the rotation or rolling of the first roller 420. Alternatively, the support base 400 may be provided with multiple first rollers 420 and multiple brake members, and each brake member respectively limits the rotation or rolling of each first roller 420. Alternatively, the support base 400 may be provided with multiple first rollers 420 and a brake member, and the brake member may limit the rotation or rolling of any one of the multiple first rollers 420.
[0035] In an optional embodiment, the support seat 400 may be provided with a plurality of first rollers 420, which may be distributed along the length direction of the storage slot 410, and the support seat 400 may be provided with a first brake member 430 and a second brake member 440, which may be used to respectively limit the rotation or rolling of the first rollers 420 near the two ends of the storage slot 410 along its own length direction. In this way, the quartz tube 100 and the support seat 400 can be relatively fixed only by limiting the first rollers 420 near the two ends of the storage slot 410 along its own length direction, which is conducive to reducing the number of brake members, simplifying the structure of the tube replacement auxiliary device, and reducing the manufacturing cost.
[0036] Specifically, the first brake member 430 may be used to limit the rotation or rolling of the first roller 420 near the first opening 411 , and the second brake member 440 may be used to limit the rotation or rolling of the first roller 420 near the second opening 412 .
[0037] In other embodiments, a plurality of brake components may be disposed on the support base 400 , and each brake component is used to limit the rotation or rolling of each first roller 420 .
[0038] Of course, only one brake member may be provided on the support base 400 , and the brake member may be used to limit the rotation or rolling of the first roller 420 located at the middle position of the storage slot 410 .
[0039] In an optional embodiment, the first roller 420 may be an elastic wheel, so that after the quartz tube 100 is placed in the storage tank 410, there is no hard contact between the first roller 420 and the quartz tube 100, thereby ensuring that the quartz tube 100 is not easily damaged during transportation.
[0040] Here, the first roller 420 may be an elastic rubber wheel.
[0041] In other embodiments, the first roller 420 is a hard roller, for example, the first roller 420 is a steel roller or a hard alloy roller.
[0042] In an optional embodiment, the support seat 400 may be provided with multiple rows of first rollers 420, at least one row of the multiple rows of first rollers 420 is provided on the bottom wall of the storage tank 410, at least one row is provided on the first side wall of the storage tank 410, and at least one row is provided on the second side wall of the storage tank 410. In this way, the quartz tube 100 can be assisted in sliding in three directions, namely, the two sides and the bottom of the quartz tube 100, so that the quartz tube 100 can be more easily slid out of the storage tank 410, and the operator's physical strength can be saved.
[0043] Here, the first brake member 430 and the second brake member 440 can respectively limit the rotation or rolling of the first roller 420 located on the bottom wall of the storage slot 410 and close to the two ends of the storage slot 410 along its own length direction.
[0044] In one embodiment, the brake member may include a brake pad, which is rotatably connected to the support seat 400. When the brake pad is in the first position, the brake pad is separated from the first roller 420; when the brake pad is in the second position, the brake pad contacts the first roller 420 to limit the rotation of the first roller 420. Specifically, the brake pad may be located in the fixing groove, and a limiting portion may be provided in the fixing groove. When the brake pad is located below the first limiting portion, the brake pad is away from the first roller 420; when the brake pad is located above the limiting portion, the brake member is switched to a braking state, and the brake pad contacts the first roller 420.
[0045] In another embodiment, the brake pad can be telescopically arranged on the support seat 400. When the brake pad is in an extended state, the brake pad can be extended into the storage slot 410 and contact the first roller 420 near the two ends of the storage slot 410 along its own length direction to limit the rolling and rotation of the first roller 420.
[0046] Here, the specific structure of the brake component is not limited, and it only needs to be able to achieve the braking effect.
[0047] It should be noted that, when the number of first rollers 420 is greater than the number of brake components, the brake components only need to realize the braking operation of the same number of first rollers 420. For example, only one brake component is provided on the support seat 400, and the brake component can realize the braking operation of any first roller 420. Alternatively, two brake components are provided on the support seat 400, and the two brake components can respectively realize the braking operation of any two first rollers 420.
[0048] In some embodiments, in order to prevent the quartz tube 100 from slipping out of the storage tank 410 during the lifting process, a block may be provided at the first opening 411 and the second opening 412, and both blocks may be movably connected to the support seat 400. During the lifting process, the two blocks may be respectively rotated to the first opening 411 and the second opening 412, so that the two blocks respectively block the quartz tube 100. When the support seat 400 is lifted and lowered into place, the two blocks may be respectively rotated to the sides of the first opening 411 and the second opening 412, so that the two blocks no longer block the quartz tube 100.
[0049] In an optional embodiment of the present application, the lifting mechanism 300 may include a bottom bracket 310, a scissor assembly 330 and a telescopic drive 340. The bottom of the scissor assembly 330 may be connected to the bottom bracket 310, the top of the scissor assembly 330 may be connected to the support seat 400, the telescopic drive 340 may be arranged on the bottom bracket 310, and the driving end of the telescopic drive 340 may be connected to the scissor assembly 330. The telescopic drive 340 may be telescopic to drive the scissor assembly 330 to rise and fall, thereby driving the support seat 400 to rise and fall. Compared with the method of directly driving the support seat 400 to rise and fall through the telescopic drive 340, the method of indirectly driving the support seat 400 to rise and fall through the scissor assembly 330 is different from the method of directly driving the support seat 400 to rise and fall through the telescopic drive 340. Since the scissor assembly 330 adopts a scissor structure design, the structure is stable and can withstand a large load, which can make the lifting process smoother, and the scissor assembly 330 has a compact structure and does not occupy too much space. The scissor assembly 330 can be folded and extended, and the height range of adaptation is larger.
[0050] In other embodiments, the lifting mechanism 300 may include a bottom bracket 310 and a telescopic driving member 340, the bottom end of the telescopic driving member 340 is connected to the bottom bracket 310, and the top end of the telescopic driving member 340 is connected to the support base 400, and the telescopic driving member 340 can be telescoped to drive the support base 400 to rise and fall.
[0051] In an optional embodiment, the scissors-type assembly 330 may include multiple layers of X-shaped link assemblies, and the link assemblies may include a first link 331 and a second link 332, the middle portion of the first link 331 is rotatably connected to the middle portion of the second link 332, and two adjacent layers of link assemblies are rotatably connected together by hinges arranged at the ends of the first link 331 and the second link 332, the bottom end of the first link 331 in the bottom layer of the link assembly is rotatably connected to the bottom bracket 310, and the bottom end of the second link 332 is rotatably connected to the driving end of the telescopic drive member 340; one of the top end of the first link 331 and the top end of the second link 332 of the top layer of the link assembly is rotatably connected to the support seat 400, and the other is slidably connected to the support seat 400.
[0052] In another optional embodiment, the scissors assembly 330 may include only a set of first links 331 and second links 332, the middle portion of the first link 331 is rotatably connected to the middle portion of the second link 332, and the bottom end of the first link 331 is rotatably connected to the bottom bracket 310, the bottom end of the second link 332 is rotatably connected to the driving end of the telescopic drive member 340, one of the top end of the first link 331 and the top end of the second link 332 is rotatably connected to the support seat 400, and the other is slidably connected to the support seat 400.
[0053] Optionally, the lifting mechanism 300 may further include a top bracket 320 , the top bracket 320 is connected to the support base 400 , and the top of the scissor assembly 330 is connected to the top bracket 320 .
[0054] In an optional embodiment, a slide groove 311 may be provided on the bottom bracket 310, and the slide groove 311 may extend along the telescopic direction of the telescopic driving member 340, and a second roller 341 may be provided at the driving end of the telescopic driving member 340, and the second roller 341 may be rolled in the slide groove 311, and the second roller 341 may contact the top wall and the bottom wall of the slide groove 311 respectively. In this way, the sliding connection between the driving end of the telescopic driving member 340 and the bottom bracket 310 can be achieved through the second roller 341, and the friction between the driving end of the telescopic driving member 340 and the bottom bracket 310 can be reduced through the second roller 341, so that the driving end of the telescopic driving member 340 can be smoothly extended and retracted in the slide groove 311; the slide groove 311 can guide the extension and retraction of the driving end of the telescopic driving member 340, and the top wall and the bottom wall of the slide groove 311 can limit the second roller 341 in the height direction, thereby limiting the driving end of the telescopic driving member 340 and avoiding the displacement of the driving end of the telescopic driving member 340.
[0055] In other embodiments, the telescopic driving member 340 is only disposed on the bottom bracket 310 , the slide groove 311 is not disposed on the bottom bracket 310 , and the driving end of the telescopic driving member 340 is not disposed with the second roller 341 .
[0056] Optionally, the telescopic driving member 340 may be a pneumatic cylinder, an oil cylinder or an electric cylinder, the cylinder body of the telescopic driving member 340 is fixedly connected to the bottom bracket 310, and the second roller 341 is disposed on the end of the piston rod of the telescopic driving member 340 outside the cylinder body.
[0057] In an optional embodiment, the tube-changing auxiliary device may further include a moving vehicle 200, and the bottom of the lifting mechanism 300 may be connected to the moving vehicle 200. In this way, the tube-changing auxiliary device may be moved to the diffusion machine where the quartz tube 100 needs to be replaced by moving the moving vehicle 200, and the position of the tube-changing auxiliary device may be adjusted to facilitate the transportation of the quartz tube 100, without the need for manual handling of the quartz tube 100 or manual handling of the tube-changing auxiliary device.
[0058] In other embodiments, the pipe-changing auxiliary device may not include the moving vehicle 200 , and the bottom of the lifting mechanism 300 may directly contact the ground.
[0059] When it is necessary to replace the quartz tube 100 in the furnace chamber with a height of 1.5 meters to 4 meters, the tube replacement operation can be carried out with the help of a tube replacement auxiliary device. First, the support seat 400 is lowered to the lowest position through the lifting mechanism 300, and the brake member is adjusted to a braking state so that the brake member limits the rotation or rolling of the first roller 420. Then, the quartz tube 100 to be replaced is placed in the storage tank 410, and then the tube replacement auxiliary device is moved to the side of the diffusion machine to be replaced by moving the mobile vehicle 200. The position of the tube replacement auxiliary device is adjusted, and the support seat 400 is raised by the lifting mechanism 300 to raise the quartz tube 100 to the same height as the furnace chamber inlet. Then, the brake member is adjusted to an unbraked state, and the quartz tube 100 is pushed to move, so that the first roller 420 assists the quartz tube 100 to move, so that the quartz tube 100 can slide out of the storage tank 410 and slide into the furnace chamber.
[0060] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.
Claims
1. A pipe replacement auxiliary device, characterized in that: include: A support seat (400), the support seat (400) being provided with a horizontally extending storage groove (410) and an opening communicating with the storage groove (410), the storage groove (410) being used to store the quartz tube (100), and the quartz tube (100) being able to slide out of the storage groove (410) through the opening; The lifting mechanism (300) is connected to the support base (400) and is used to drive the support base (400) to rise and fall.
2. The tube replacement auxiliary device according to claim 1, characterized in that: At least one first roller (420) is disposed on the support seat (400), at least a portion of the first roller (420) is located in the storage groove (410) and can contact the quartz tube (100), and the first roller (420) is used to assist the quartz tube (100) to slide toward the opening.
3. The tube replacement auxiliary device according to claim 2, characterized in that: The first roller (420) is rollably disposed in the storage slot (410), or a fixed slot is disposed on the support seat (400), and the first roller (420) is rotatably disposed in the fixed slot, and a portion of the first roller (420) is located in the storage slot (410).
4. The tube replacement auxiliary device according to claim 3, characterized in that: At least one brake component is disposed on the support seat (400), and the brake component is used to limit the rotation or rolling of the first roller (420).
5. The tube replacement auxiliary device according to claim 3, characterized in that: The support seat (400) is provided with a plurality of the first rollers (420), and the plurality of the first rollers (420) are distributed along the length direction of the storage slot (410). The support seat (400) is provided with a first brake member (430) and a second brake member (440), and the first brake member (430) and the second brake member (440) are respectively used to limit the rotation or rolling of the first rollers (420) at both ends of the storage slot (410) along its own length direction.
6. The tube replacement auxiliary device according to any one of claims 2 to 5, characterized in that: The first roller (420) is an elastic wheel.
7. The tube replacement auxiliary device according to claim 1, characterized in that: The opening comprises a first opening (411) and a second opening (412), wherein the first opening (411) and the second opening (412) are respectively located at two ends of the storage slot (410) along its own length direction, and the first opening (411) and the second opening (412) are both connected to the storage slot (410).
8. The tube replacement auxiliary device according to claim 1, characterized in that: The lifting mechanism (300) comprises: Bottom bracket (310); A scissor assembly (330), wherein the bottom of the scissor assembly (330) is connected to the bottom bracket (310), and the top of the scissor assembly (330) is connected to the support seat (400); A telescopic driving member (340) is arranged on the bottom bracket (310); a driving end of the telescopic driving member (340) is connected to the scissor assembly (330); and the telescopic driving member (340) can be telescoped to drive the scissor assembly (330) to rise and fall.
9. The tube replacement auxiliary device according to claim 8, characterized in that: The bottom bracket (310) is provided with a slide groove (311), the slide groove (311) extends along the telescopic direction of the telescopic driving member (340), and the driving end of the telescopic driving member (340) is provided with a second roller (341), the second roller (341) is rollingly arranged in the slide groove (311), and the second roller (341) is respectively in contact with the top wall and the bottom wall of the slide groove (311).
10. The tube replacement auxiliary device according to claim 1, characterized in that: It also includes a moving vehicle (200), and the bottom of the lifting mechanism (300) is connected to the moving vehicle (200).