Driving device for a lifting stage

Abstract

The application discloses a driving device for a lifting stage and relates to the lifting stage application field.The driving device comprises a ground fixed stage and multiple groups of lifting stages.The lifting stage comprises a stage board, the bottom of the stage board is provided with a mounting frame and two groups of supporting frames, one side of the supporting frame is provided with a first locking assembly, the other side is provided with multiple groups of second locking assemblies, and then the first locking assembly and the second locking assembly can be used for interlocking between two adjacent groups of lifting stages.The locking assembly is arranged, the first locking assembly is driven to extend and be embedded with the second locking assembly of the adjacent stage when the conventional anti-falling structure of the locking assembly extends and is clamped, the first locking assembly and the second locking assembly are interlocked, multiple independent lifting stages can be connected as a whole, and the overall safety of the stage system is improved.

Description

Technical Field

[0001] This invention relates to the field of lifting stage applications, specifically a driving device for lifting stages. Background Technology

[0002] In the stage system, the chorus uses multiple sets of liftable strip stages. The core of the system is to achieve synchronous or differentiated lifting of each set of stages through a group independent drive system. Combined with a precision guide structure and multiple safety anti-detachment mechanisms, it ensures performance safety and visual effects.

[0003] Chain-driven stage lifting is one of the mainstream solutions. Standard roller chains / plate chains bear the tension and drive the stage to rise and fall through the sprockets. With the help of an additional guide structure, a hydraulic telescopic mechanism is used to push metal blocks into the limit slots to prevent the stage from falling accidentally. There are multiple sets of limit slots in the vertical direction of the stage lifting, so that the stage can be adjusted to various heights.

[0004] Chain-driven lifting stages, while their drive chains themselves prevent the stage from falling, still require corresponding anti-detachment mechanisms, such as the hydraulic telescopic mechanism mentioned above combined with metal blocks and limit slots. Independent mechanical drives or limit mechanisms still pose certain safety risks. However, a large chorus stage system consists of multiple independently driven strip stages. If these strip stages can interlock after height adjustment, the overall safety factor of the stage will be greatly improved. Even if the safety structure of one stage is damaged, the other stages can still provide locking support, thus enhancing the overall safety performance of the lifting stage. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a driving device for a lifting stage to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a driving device for a lifting stage, comprising a fixed ground stage, with multiple lifting stages arranged below the fixed ground stage, each lifting stage including a stage panel, a mounting frame and two symmetrically distributed support frames at the bottom of the stage panel, two sets of connecting blocks installed on the sides of each of the two sets of support frames, support platforms on both sides of the stage panel, and sprocket lifting mechanisms for driving the connecting blocks installed inside each of the two sets of support platforms, both sets of sprocket lifting mechanisms being connected to a driving device, two sets of limiting frames on the sides of each of the two sets of support platforms, each limiting frame including multiple limiting plates and one limiting vertical plate, and two sets of anti-detachment mechanisms installed on the sides of each of the two sets of support frames, each anti-detachment mechanism consisting of a hydraulic cylinder and a metal locking block, the metal locking block of the anti-detachment mechanism and the limiting plates of the limiting frame being interlocked, a first locking component on one side of each of the two sets of support frames, and multiple sets of second locking components on the other side, thereby enabling adjacent lifting stages to interlock through the first locking component and the second locking component; The first locking assembly includes a square rod fixedly installed inside the support frame and a threaded sleeve rotatably connected to the side of the support frame. The square rod is externally movably limited by a first threaded rod, which is threadedly connected to the threaded sleeve. The first locking assembly also includes a first transmission tooth rotatably connected to the side of the support frame. The first transmission tooth and the threaded sleeve are connected by a sprocket transmission assembly. A first rack is provided on the side of a set of anti-detachment mechanism metal blocks. The first rack and the first transmission tooth mesh with each other. A first mounting shell is provided at the end of the first threaded rod. A movable block is installed inside the first mounting shell by a first guide rod and a first spring. Fixed rods are provided on both sides of the movable block. A locking block is movably installed on the top of the movable block by a second guide rod and a second spring. Strip grooves are opened on both sides of the first mounting shell for limiting the fixed rods, and a second rack is provided on the top of the first mounting shell. The second locking assembly includes a second mounting shell. The side of the second mounting shell has two sets of positioning grooves that match the fixing rod, and the side of the second mounting shell is provided with a locking rod that engages with the locking block. The interior of the second mounting shell is rotatably connected to a drive shaft and a second threaded rod. The exterior of the drive shaft is provided with a second drive tooth that meshes with a second rack. The drive shaft and the second threaded rod are connected by a worm gear assembly and a gear set. The interior of the second mounting shell is movably mounted with a trapezoidal block through a third guide rod. The trapezoidal block and the second threaded rod are threadedly connected.

[0007] By adopting the above technical solution, and by setting locking components on the support frame of the lifting stage, the interlocking property of the first locking component and the second locking component can lock multiple independent lifting stages in the entire stage system, thereby improving the safety of the entire stage system. Compared with the traditional stage anti-detachment structure, the hydraulic telescopic mechanism + metal block and limit slot method usually locks and limits a set of stages. However, in this application, each individual lifting stage support frame is equipped with a set of first locking components and multiple sets of second locking components. Thus, for two adjacent lifting stages, when their traditional anti-detachment structure extends and engages, the first locking component is driven to extend and engage with the second locking component of the adjacent stage. The interlocking of the first locking component and the second locking component can connect multiple independent lifting stages into a whole, thereby improving the overall safety of the stage system.

[0008] The present invention is further configured such that the driving device includes a driving component, the output end of the driving component is connected to a gearbox, and the two ends of the gearbox are driven to be connected to two sets of driving boxes through couplings.

[0009] Preferably, a drive device is set up to drive the two sets of sprocket lifting mechanisms to drag the connecting blocks on the side of the support frame, so as to adjust the height of the support frame and ultimately realize the height adjustment of the stage board. The drive component can be a drive motor, and the drive box includes the sprockets of the sprocket lifting mechanism.

[0010] The present invention is further configured such that the sprocket lifting mechanism includes multiple sets of sprockets and chains, the multiple sets of sprockets and chains are divided into two groups and a drive box connected to them, and the sprockets and chains divided into two groups are respectively fixedly connected to two sets of connecting blocks on one side of the support frame.

[0011] Preferably, the height of the stage board is adjusted by setting up a sprocket lifting mechanism to drag the connecting block on the side of the support frame in a sprocket and chain driven manner.

[0012] The present invention is further configured such that a counterweight mechanism is provided on the inner side of each of the two sets of support platforms. The counterweight mechanism includes a wire rope, a counterweight block and a guide pulley. The wire rope is wound around the outside of the guide pulley, with one end connected to the counterweight block and the other end connected to the support frame.

[0013] Preferably, a counterweight mechanism is used to ensure the stability of the stage panel during adjustment.

[0014] The present invention is further configured such that the counterweight block of the counterweight mechanism is provided with a sliding rod for vertical positioning, and the sliding rod is installed inside the support platform.

[0015] Preferably, the installation and operation stability of the counterweight can be improved by setting a sliding rod.

[0016] The present invention is further configured such that a reinforcing layer is provided on the side of the support frame, and a circular hole is opened at the connection between the reinforcing layer and the support frame, and the steel wire rope of the counterweight mechanism passes through the circular hole and is wound around the outside of the reinforcing layer.

[0017] Preferably, by setting a reinforcing layer, the wire rope can better pull the support frame.

[0018] The present invention is further configured such that the side of the support frame is provided with multiple sets of limiting blocks, and the limiting blocks and the limiting vertical plates of the limiting frame are interlocked with each other.

[0019] Preferably, by setting a limiting block to engage the limiting vertical plate of the limiting frame, the support frame can be prevented from tilting to both sides.

[0020] The invention is further configured such that a guide ramp is provided between the locking block and the trapezoidal block, so that when the trapezoidal block moves, it can squeeze the locking block and cause it to rise along the second guide rod.

[0021] Preferably, by setting a guide ramp, it is more conducive to the trapezoidal block squeezing the locking block to raise it.

[0022] In summary, the present invention has the following main beneficial effects: This invention improves the safety of the entire stage system by installing locking components on the support frame of the lifting stage and utilizing the interlocking property of the first and second locking components to lock multiple independent lifting stages together. Compared to traditional stage anti-detachment structures, which typically use hydraulic telescopic mechanisms with metal blocks and limit slots to lock and limit a set of stages, this invention installs a set of first locking components and multiple sets of second locking components on each individual lifting stage support frame. When the traditional anti-detachment structure of two adjacent lifting stages extends and engages, it drives the first locking component to extend and engage with the second locking component of the adjacent stage. The interlocking of the first and second locking components connects multiple independent lifting stages into a whole, improving the overall safety of the stage system.

[0023] This invention provides a locking component for connecting multiple lifting stages, which can limit movement in both the vertical and horizontal directions. Traditional stage anti-detachment structures use a hydraulic telescopic mechanism to push metal blocks into limiting slots to prevent the stage from falling accidentally. This is a vertical stage locking structure. In contrast, the first and second locking components in this application are used to lock and connect two adjacent lifting stages. When the first and second locking components are simply inserted, they can already limit the two stages to each other in the vertical direction. However, when the first and second locking components are fully inserted and interlocked, they have the effect of preventing loosening and separation. That is, after the first and second locking components are fully engaged, they cannot be pulled out unless manually released. This forms a horizontal pulling limit, further improving the safety of multiple stages. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the distribution of the fixed ground stage and the lifting stage according to the present invention; Figure 2 This is a schematic diagram of the lifting stage structure of the present invention; Figure 3 This is a schematic diagram of the drive device structure of the present invention; Figure 4 This is a partial exploded view of the lifting stage of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the image; Figure 6 This is a schematic diagram showing the distribution of multiple sets of second locking components according to the present invention; Figure 7 This is a schematic diagram showing the distribution of the first locking component of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point B in the image; Figure 9 This is a schematic diagram of the first locking component and the second locking component in a separated state according to the present invention; Figure 10 This is a schematic diagram of the initial engagement of the first locking component and the second locking component of the present invention; Figure 11 This is a schematic diagram of the initial fitting internal structure of the first locking component and the second locking component of the present invention; Figure 12 A schematic diagram showing the first and second locking components of the present invention fully engaged, causing the locking block to rise; Figure 13 This is a schematic diagram of the internal structure of the locking block when it rises and engages with the locking rod according to the present invention; Figure 14 This is a schematic diagram of the installation of the locking block and the movable block of the present invention.

[0025] Explanation of reference numerals in the attached figures: 1. Stage board; 2. Mounting frame; 3. Support frame; 4. Connecting block; 5. Support platform; 6. Sprocket lifting mechanism; 7. Drive device; 701. Drive assembly; 702. Gearbox; 703. Coupling; 704. Drive box; 8. Counterweight mechanism; 9. Reinforcing layer; 10. Limiting frame; 1001. Limiting plate; 1002. Limiting vertical plate; 11. Anti-detachment mechanism; 12. Limiting block; 13. First locking assembly; 1301. Square rod; 1302. Threaded sleeve; 1303. First threaded rod; 1304. First transmission gear; 1305. Sprocket drive assembly; 1306. First rack; 1307. 1. Mounting housing; 1308. First guide rod; 1309. First spring; 1310. Movable block; 1311. Fixed rod; 1312. Second guide rod; 1313. Second spring; 1314. Engaging block; 1315. Strip groove; 1316. Second rack; 14. Second locking assembly; 1401. Second mounting housing; 1402. Positioning groove; 1403. Locking rod; 1404. Drive shaft; 1405. Second drive gear; 1406. Second threaded rod; 1407. Worm gear assembly; 1408. Gear set; 1409. Third guide rod; 1410. Trapezoidal block; 15. Ground-fixed stage. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of the present invention will now be described.

[0028] Please see Figure 1 - Figure 14A driving device for a lifting stage includes a fixed ground stage 15, which can be made of a wooden base with a central area for accommodating the lifting stage system. Multiple lifting stages are installed below the fixed ground stage 15. Each lifting stage includes a stage panel 1, made of the same material and color as the fixed ground stage 15. The bottom of the stage panel 1 has a mounting frame 2 and two symmetrically distributed support frames 3. Both the mounting frame 2 and the support frames 3 are made of metal, such as thermally broken aluminum. Two sets of connecting blocks 4 are installed on the sides of each set of support frames 3. Support platforms 5 are installed on both sides of the stage panel 1. The support platforms 5 can be constructed using steel structures or concrete. Both sets of support platforms 3 are equipped with sprocket lifting mechanisms 6 for driving the connecting block 4. The two sets of sprocket lifting mechanisms 6 are connected to the drive device 7. The sides of the two sets of support platforms 5 are equipped with two sets of limit frames 10. The limit frame 10 includes multiple sets of limit plates 1001 and a set of limit vertical plates 1002. The sides of the two sets of support platforms 3 are equipped with two sets of anti-detachment mechanisms 11. The anti-detachment mechanism 11 is composed of a hydraulic cylinder and a metal block. The metal block of the anti-detachment mechanism 11 and the limit plates 1001 of the limit frame 10 are interlocked. One side of the two sets of support platforms 3 is equipped with a first locking component 13, and the other side is equipped with multiple sets of second locking components 14. Thus, the two adjacent sets of lifting stages can be interlocked through the first locking component 13 and the second locking component 14. The first locking assembly 13 includes a square rod 1301 fixedly installed inside the support frame 3 and a threaded sleeve 1302 rotatably connected to the side of the support frame 3. A first threaded rod 1303 is externally and movablely limited on the square rod 1301. The first threaded rod 1303 and the threaded sleeve 1302 are threadedly connected. The first locking assembly 13 also includes a first transmission gear 1304 rotatably connected to the side of the support frame 3. The first transmission gear 1304 and the threaded sleeve 1302 are connected by a sprocket transmission assembly 1305. A first rack 1306 is provided on the side of the metal block of a set of anti-detachment mechanisms 11. The first rack 1306 and the first… The transmission gears 1304 mesh with each other. The end of the first threaded rod 1303 is provided with a first mounting shell 1307. Inside the first mounting shell 1307, a movable block 1310 is interactively mounted through a first guide rod 1308 and a first spring 1309. Fixed rods 1311 are provided on both sides of the movable block 1310. A locking block 1314 is movably mounted on the top of the movable block 1310 through a second guide rod 1312 and a second spring 1313. Strip grooves 1315 are respectively opened on both sides of the first mounting shell 1307 for limiting the fixed rods 1311. A second rack 1316 is provided on the top of the first mounting shell 1307. The second locking assembly 14 includes a second mounting shell 1401. The side of the second mounting shell 1401 is provided with two sets of positioning grooves 1402 that match the fixing rod 1311. The side of the second mounting shell 1401 is provided with a locking rod 1403 that engages with the locking block 1314. The interior of the second mounting shell 1401 is rotatably connected to a drive shaft 1404 and a second threaded rod 1406. The exterior of the drive shaft 1404 is provided with a second drive tooth 1405 that meshes with the second rack 1316. The drive shaft 1404 and the second threaded rod 1406 are connected by a worm gear assembly 1407 and a gear set 1408. The interior of the second mounting shell 1401 is movably mounted with a trapezoidal block 1410 through a third guide rod 1409. The trapezoidal block 1410 and the second threaded rod 1406 are threadedly connected.

[0029] Please refer to the above embodiments for further details. Figure 3 The drive device 7 includes a drive assembly 701. The output end of the drive assembly 701 is connected to a gearbox 702. The two ends of the gearbox 702 are connected to two sets of drive boxes 704 through a coupling 703. The drive device 7 is used to drive the two sets of sprocket lifting mechanisms 6 to drag the connecting block 4 on the side of the support frame 3, so as to adjust the height of the support frame 3 and ultimately realize the height adjustment of the stage board 1. The drive assembly 701 can be a drive motor, while the drive box 704 includes the sprockets of the sprocket lifting mechanism 6.

[0030] Please refer to the above embodiments for further details. Figure 4 The sprocket lifting mechanism 6 includes multiple sets of sprockets and chains. The multiple sets of sprockets and chains are divided into two groups and connected to a drive box 704. The sprockets and chains in the two groups are fixedly connected to two sets of connecting blocks 4 on one side of the support frame 3. By setting the sprocket lifting mechanism 6, the connecting blocks 4 on the side of the support frame 3 are dragged in the way of sprocket and chain drive, thereby realizing the height adjustment of the stage board 1.

[0031] Please refer to the above embodiments for further details. Figure 2 and Figure 4 The inner sides of both sets of support platforms 5 are equipped with counterweight mechanisms 8. The counterweight mechanism 8 includes a steel wire rope, a counterweight block and a guide pulley. The steel wire rope is wound around the outside of the guide pulley, with one end connected to the counterweight block and the other end connected to the support frame 3. By setting the counterweight mechanism 8, the stability of the stage board 1 during adjustment is ensured.

[0032] Please refer to the above embodiments for further details. Figure 4 The counterweight of the counterweight mechanism 8 is equipped with a sliding rod for vertical positioning. The sliding rod is installed inside the support platform 5. The installation and operation stability of the counterweight can be improved by setting the sliding rod.

[0033] Please refer to the above embodiments for further details. Figure 8 The support frame 3 has a reinforcing layer 9 on its side. A round hole is opened at the connection between the reinforcing layer 9 and the support frame 3. The steel wire rope of the counterweight mechanism 8 passes through the round hole and is wrapped around the outside of the reinforcing layer 9. By setting the reinforcing layer 9, the steel wire rope can better drag the support frame 3.

[0034] Please refer to the above embodiments for further details. Figure 5 - Figure 8 The side of the support frame 3 is provided with multiple sets of limiting blocks 12. The limiting blocks 12 and the limiting vertical plate 1002 of the limiting frame 10 are interlocked with each other. By setting the limiting blocks 12 to engage the limiting vertical plate 1002 of the limiting frame 10, the support frame 3 can be prevented from tilting to both sides.

[0035] Please refer to the above embodiments for further details. Figure 14 A guide ramp is provided between the locking block 1314 and the trapezoidal block 1410. When the trapezoidal block 1410 moves, it can squeeze the locking block 1314 to make it rise along the second guide rod 1312. By providing the guide ramp, it is more conducive to the trapezoidal block 1410 squeezing the locking block 1314 to make it rise.

[0036] In practical operation, when the stage is initially set up and all stages need to be adjusted in height, all lifting stages can be locked after adjustment. If it is necessary to adjust one set of stages individually, it is necessary not only to release the limiting structure of that set of stages, but also to release the limiting structure of the adjacent set of stages at the same time, so that the adjacent stages no longer restrict that set of stages.

[0037] Specifically, when the stage height needs to be adjusted, the anti-detachment and limiting structure of the stage must first be released, and the drive assembly 701 is started to drive the gearbox 702. The gearbox 702 drives two sets of drive boxes 704 through the couplings 703 at both ends. The two sets of drive boxes 704 drive the sprocket group of the sprocket lifting mechanism 6 to run. The sprocket group drags the connecting block 4 to adjust the height, thereby driving the support frame 3 connected to it to adjust the height, that is, to adjust the height of the stage board 1. When the height of the support frame 3 changes, the steel wire rope of the counterweight mechanism 8 will be wound up and down, and the corresponding counterweight block of the counterweight mechanism 8 will also adjust the height accordingly. In addition, the limiting block 12 installed on the side of the support frame 3 slides along the limiting vertical plate 1002, which can prevent the support frame 3 from tilting to the left or right. After the height of the stage board 1 is adjusted, the anti-detachment mechanism 11 on both sides of the support frame 3 is activated. The hydraulic cylinder of the anti-detachment mechanism 11 pushes the metal block to engage in the corresponding limit plate 1001. The limit plate 1001 can prevent the support frame 3 from falling accidentally in the vertical direction. When the hydraulic cylinder of one set of anti-detachment mechanisms 11 moves the metal block, it drives the first rack 1306 to move, thus the first rack 1306 and the first transmission gear 1304 mesh with each other. The first transmission gear 1304 drives the threaded sleeve 1302 to rotate through the sprocket transmission assembly 1305, thereby causing the first threaded rod 1303 to move horizontally along the square rod 1301, pushing the internal structure of the first mounting shell 1307 to move together. When the first mounting shell 1307 moves the movable block 1310 into the second mounting shell 1401, the two sets of fixing rods 1311 on the side of the movable block 1310 will first engage in the positioning groove 1402, thereby restricting the internal structure of the movable block 1310 from moving. Then, the first mounting shell 1307 continues to extend into the second mounting shell 1401 under the push of the first threaded rod 1303, so that the first mounting shell 1307 and the movable block 1310 compress the first spring 1309. The first mounting shell 1307 continues to move. During the extension process, the other end of the strip groove 1315 abuts against the fixed rod 1311, cooperating with the positioning groove 1402 to lock the fixed rod 1311. During this continued extension process, the second rack 1316 and the second transmission gear 1405 mesh, driving the transmission shaft 1404 connected to it to rotate. As a result, the worm gear assembly 1407 and the gear set 1408 drive the second threaded rod 1406 to rotate, causing the trapezoidal block 1410 to slide along the third guide rod 1409, squeezing the locking block 1314 in the movable block 1310. The locking block 1314 moves upward along the second guide rod 1312 and compresses the second spring 1313. That is, the locking block 1314 and the locking rod 1403 of the second locking assembly 14 lock each other. At this step, the first locking assembly 13 and the second locking assembly 14 of the two adjacent sets of lifting stages are interlocked. For example, the first locking assembly 13 of the first lifting stage and a certain set of the second locking assembly 14 of the second lifting stage are interlocked. Since the distribution of the limiting vertical plates 1002 matches the distribution spacing of the multiple sets of second locking components 14, the operation of the anti-detachment mechanism 11 and the operation of the first locking component 13 and the second locking component 14 can also be carried out in coordination. In the same way as above, multiple sets of lifting stages can be locked together after the height adjustment is completed. Even if one set of lifting stages has an accident, safety will be ensured by the limiting support of other stages.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A driving device for a lifting stage, comprising a ground-fixed stage (15), characterized in that: Multiple sets of lifting stages are provided below the ground-fixed stage (15). The lifting stage includes a stage board (1). The bottom of the stage board (1) is provided with a mounting frame (2) and two sets of symmetrically distributed support frames (3). Two sets of connecting blocks (4) are installed on the sides of the two sets of support frames (3). Support platforms (5) are provided on both sides of the stage board (1). The interior of the two sets of support platforms (5) is provided with a sprocket lifting mechanism (6) for driving the connecting blocks (4). The two sets of sprocket lifting mechanisms (6) are connected to a drive device (7). Two sets of limiting frames (10) are provided on the sides of the two sets of support platforms (5). The frame (10) includes multiple sets of limiting plates (1001) and a set of limiting vertical plates (1002). Two sets of anti-detachment mechanisms (11) are installed on the sides of the two sets of support frames (3). The anti-detachment mechanism (11) is composed of a hydraulic cylinder and a metal block. The metal block of the anti-detachment mechanism (11) and the limiting plates (1001) of the limiting frame (10) are interlocked. A first locking component (13) is provided on one side of the two sets of support frames (3), and multiple sets of second locking components (14) are provided on the other side. Thus, the two adjacent sets of lifting stages can be interlocked through the first locking component (13) and the second locking component (14). The first locking assembly (13) includes a square rod (1301) fixedly installed inside the support frame (3) and a threaded sleeve (1302) rotatably connected to the side of the support frame (3). The square rod (1301) is externally limited by a first threaded rod (1303). The first threaded rod (1303) and the threaded sleeve (1302) are threadedly connected. The first locking assembly (13) also includes a first transmission gear (1304) rotatably connected to the side of the support frame (3). The first transmission gear (1304) and the threaded sleeve (1302) are connected by a sprocket transmission assembly (1305). The side of the metal block of the anti-detachment mechanism (11) is provided with a first rack (1306). The first rack (1306) and the first... The transmission teeth (1304) mesh with each other. The end of the first threaded rod (1303) is provided with a first mounting shell (1307). Inside the first mounting shell (1307), a movable block (1310) is installed through the interaction of a first guide rod (1308) and a first spring (1309). Fixed rods (1311) are provided on both sides of the movable block (1310). A locking block (1314) is movably installed on the top of the movable block (1310) through a second guide rod (1312) and a second spring (1313). Strip grooves (1315) are respectively opened on both sides of the first mounting shell (1307) for limiting the fixed rods (1311). A second rack (1316) is provided on the top of the first mounting shell (1307). The second locking assembly (14) includes a second mounting housing (1401). The side of the second mounting housing (1401) is provided with two sets of positioning grooves (1402) that match the fixing rod (1311). The side of the second mounting housing (1401) is provided with a locking rod (1403) that engages with the locking block (1314). The interior of the second mounting housing (1401) is rotatably connected to a drive shaft (1404) and a second threaded rod (1406). The external part is provided with a second transmission tooth (1405) that meshes with the second rack (1316), and the transmission shaft (1404) and the second threaded rod (1406) are connected by a worm gear assembly (1407) and a gear set (1408). The interior of the second mounting shell (1401) is movably mounted with a trapezoidal block (1410) through a third guide rod (1409), and the trapezoidal block (1410) and the second threaded rod (1406) are threadedly connected.

2. The driving device for a lifting stage according to claim 1, characterized in that: The drive device (7) includes a drive assembly (701), the output end of which is connected to a gearbox (702), and the two ends of the gearbox (702) are connected to two sets of drive boxes (704) via a coupling (703).

3. The driving device for a lifting stage according to claim 2, characterized in that: The sprocket lifting mechanism (6) includes multiple sets of sprockets and chains. The multiple sets of sprockets and chains are divided into two groups and a drive box (704) for drive connection. The sprockets and chains divided into two groups are fixedly connected to two sets of connecting blocks (4) on one side of the support frame (3).

4. The driving device for a lifting stage according to claim 1, characterized in that: The inner side of both sets of support platforms (5) is provided with a counterweight mechanism (8). The counterweight mechanism (8) includes a wire rope, a counterweight block and a guide pulley. The wire rope is wound around the outside of the guide pulley, with one end connected to the counterweight block and the other end connected to the support frame (3).

5. A driving device for a lifting stage according to claim 4, characterized in that: The counterweight block of the counterweight mechanism (8) is equipped with a sliding rod for vertical positioning, and the sliding rod is installed inside the support platform (5).

6. A driving device for a lifting stage according to claim 5, characterized in that: The support frame (3) has a reinforcing layer (9) on its side. A round hole is opened at the connection between the reinforcing layer (9) and the support frame (3). The steel wire rope of the counterweight mechanism (8) passes through the round hole and is wrapped around the outside of the reinforcing layer (9).

7. The driving device for a lifting stage according to claim 1, characterized in that: The side of the support frame (3) is provided with multiple sets of limiting blocks (12), and the limiting blocks (12) and the limiting vertical plates (1002) of the limiting frame (10) are interlocked.

8. The driving device for a lifting stage according to claim 1, characterized in that: A guide ramp is provided between the locking block (1314) and the trapezoidal block (1410). When the trapezoidal block (1410) moves, it can squeeze the locking block (1314) so ​​that it rises along the second guide rod (1312).

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