Rack type lifting stage

Abstract

The invention discloses a rack type lifting stage which comprises a stage plate, steps are fixedly connected to the two sides of the stage plate, a plurality of tooth columns are arranged on the two sides of the stage plate, mounting plates are mounted above the tooth columns, a plurality of first fixing rods are fixedly connected between the mounting plates, and bases are mounted above and below the tooth columns. A plurality of second fixing rods are fixedly connected between the bases, a rotating shaft is mounted on one side of the mounting plate, and a protection rod is fixedly connected to one side of the rotating shaft. By means of the structure, the trundles below the stage base can easily achieve overall movement, the position can be rapidly adjusted according to needs, the double-shaft motor is matched with the gearbox to accurately control the lifting speed and height of the stage plate, the telescopic rods and the anti-skid plates are arranged to be firmly fixed after the stage is in place, and the unfolded protection rods can prevent personnel from falling off; the steps are arranged on the two sides of the stage plate, so that the stage plate has multiple safety structures and convenience, and reliable guarantee is provided for stage operation and personnel safety.

Description

Technical Field

[0001] This invention relates to the field of lifting stage equipment technology, and in particular to a rack and pinion type lifting stage that can be easily moved. Background Technology

[0002] In diverse settings such as cultural performances, commercial exhibitions, and wedding ceremonies, the performance of a lifting stage, as a core piece of equipment for enhancing visual appeal, improving audience experience, and optimizing space utilization, directly impacts the event's effectiveness and ease of operation. While traditional lifting stages meet basic height adjustment needs to some extent, they generally suffer from insufficient structural rigidity, poor mobility, low control precision, and inadequate safety protection mechanisms, thus limiting their application in modern high-standard events.

[0003] Currently, most common lifting stages use a fixed base structure, lacking integrated mobility solutions. This makes equipment transportation, site adjustment, and storage extremely inconvenient, often requiring additional lifting and handling equipment. This not only significantly increases labor and time costs but also limits the stage's rapid deployment and dynamic spatial adaptability. Regarding drive methods, many traditional products rely on hydraulic systems or screw drives, which suffer from large fluctuations in lifting speed, noticeable start-stop shocks, and limited positioning accuracy. This can easily cause instability during performances, affecting the continuity and visual effects of the show, and also makes it difficult to achieve the high-precision requirements of multi-unit synchronous control.

[0004] Furthermore, most existing lifting stages lack effective self-locking protection or anti-fall mechanisms after being raised, relying solely on a single hydraulic lock or electric brake, which poses safety hazards and insufficient reliability. Especially under prolonged loads or sudden power outages, stage stability and operator safety face significant risks. Therefore, there is an urgent need for a lifting stage system with a reasonable structure, convenient mobility, precise control, and multiple safety protection mechanisms to cope with increasingly complex application scenarios and ever-increasing user demands. Summary of the Invention

[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a rack and pinion lifting stage that can be quickly adjusted in position by casters and can accurately control the lifting speed and height of the stage panels, thus providing multiple safety structures and convenience.

[0006] This invention also provides a rack-and-pinion lifting stage, comprising a stage panel, steps fixedly arranged on both sides of the stage panel, at least two rack columns arranged below the stage panel, a top mounting plate fixedly connected to the top of each rack column, and at least one first fixing rod fixedly connected between the top mounting plates; a base is provided at the bottom of each rack column, and at least one second fixing rod is fixedly connected between the bases; a transmission assembly driven by a motor is mounted on the top mounting plate or the base, the transmission assembly meshing with the rack columns to drive the stage panel to lift and lower; and unfoldable or retractable protective rods are also provided around the perimeter of the stage panel. This invention achieves stable lifting and lowering of the stage panel through the meshing drive of the rack columns and the transmission assembly, with a simple and reliable structure; the connection between the top mounting plate and the base via fixing rods enhances the rigidity and stability of the overall structure; and the unfoldable or retractable protective rods further improve safety and adaptability.

[0007] According to the present invention, a rack-and-pinion lifting stage is provided, wherein casters with braking mechanisms are installed at the bottom of the base. By providing casters with braking mechanisms at the bottom of the base, the entire stage can be easily moved and precisely positioned, significantly improving the deployment efficiency of the equipment in different locations. Simultaneously, the braking mechanism effectively prevents the stage from accidentally moving during lifting.

[0008] According to the present invention, a rack-and-pinion lifting stage has a fixed plate fixedly connected to the side of the base, and a vertically extendable telescopic rod hinged or sleeved below the fixed plate. An anti-slip plate is fixedly connected to the bottom end of the telescopic rod. The telescopic rod and anti-slip plate hinged or sleeved below the fixed plate provide additional support after the stage is in place, enhancing the stage's anti-slip and anti-overturning capabilities under load, and significantly improving the safety and stability of the equipment during operation.

[0009] According to the present invention, a rack-and-pinion lifting stage is provided with a hook fixedly installed on the side of the stage panel or top mounting plate, and one end of the protective rod is provided with a buckle or pin structure adapted to the hook to achieve fixation when the protective rod is erected. Here, the cooperation between the hook and the buckle or pin at the end of the protective rod achieves quick locking after the protective rod is erected, which is simple to operate and reliable in connection, ensuring safety while also facilitating disassembly and storage.

[0010] According to the present invention, a rack-and-pinion lifting stage includes a transmission assembly comprising a lifting block meshing with the rack, a rotating rod passing through and driving the lifting block, and a gearbox driving the rotating rod. The gearbox is connected to the output end of a dual-axis motor via a connecting shaft. In this invention, the transmission assembly uses a gearbox and a dual-axis motor in conjunction, driving the lifting block along the rack via the rotating rod. This results in high transmission accuracy and fast response speed, enabling smooth and accurate lifting control of the stage.

[0011] According to the present invention, in a rack and pinion lifting stage, the output shaft of the dual-axis motor is fixedly connected to the connecting shaft via a coupling, and the gearbox is a reduction gearbox, the output end of which is connected to the rotating rod. The dual-axis motor, fixedly connected to the connecting shaft via a coupling and equipped with a reduction gearbox, not only ensures the reliability of power transmission but also improves torque output and control accuracy, making the lifting process smoother and more synchronized.

[0012] According to the present invention, a rack-and-pinion lifting stage is provided, wherein the steps are fixedly connected to the bottom of the stage panel via a connecting rod fixedly connected to one side, and the steps are foldable or detachable. The steps, being fixed to the bottom of the stage panel via the connecting rod and being foldable or detachable, facilitate personnel access to and from the stage, as well as equipment storage and transportation, thus improving the practicality and economy of the product.

[0013] According to the present invention, in a rack-and-pinion lifting stage, the protective rod is a multi-segment telescopic structure or a hinged folding structure, and its bottom is hinged to the base or stage panel via a rotating shaft. The protective rod is designed as a multi-segment telescopic or hinged folding structure, and is hinged to the base or stage panel via a rotating shaft, allowing for flexible adjustment of the protection range according to usage needs, saving space during storage, and making it more convenient to use.

[0014] According to the present invention, a rack-and-pinion lifting stage is provided, in which the dual-axis motor drives the rotating rods on both sides to rotate synchronously through the gearbox and connecting shaft, thereby causing the lifting blocks meshing with the gears to move synchronously, thus forming a mechanical forced synchronous lifting mechanism. The present invention, by driving the gearboxes and rotating rods on both sides to operate synchronously through the dual-axis motor, forces symmetrical movement of the lifting blocks, effectively preventing skewness or jamming during stage panel lifting, ensuring smooth lifting and safe operation.

[0015] According to the present invention, in a rack-and-pinion lifting stage, when the guard rod rotates around the rotating axis to a vertical position, its body abuts against the side of the mounting plate or stage panel, thereby forming a mechanical limit. When the buckle or pin structure at one end of the guard rod is connected and fixed to the hook, the guard rod, the rotating axis, and the stage panel together form a stable triangular rigid support structure. In this invention, the guard rod achieves limitation by mechanically abutting against the side of the mounting plate or stage panel when in the vertical position, and then forms a triangular rigid support structure by locking with the hook, which significantly enhances the impact resistance and overall stability of the guardrail, resulting in excellent safety performance.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This device integrates a self-locking caster system beneath the stage base, allowing the entire lifting stage to be easily and flexibly moved and positioned according to the layout of the performance venue or the needs of the exhibition flow. It eliminates the need for additional handling equipment or a large amount of manpower, enabling rapid relocation and setup, significantly improving the equipment's spatial adaptability and reusability. Simultaneously, its drive system uses a high-precision dual-axis motor with a gearbox to drive a rack and pinion transmission mechanism for lifting and lowering. This provides smooth transmission, rapid response, and precise control over the stage's lifting speed and target height, meeting the diverse dynamic adjustment needs of different performance formats. The entire operation can be completed with a single button press through a centralized control system, greatly reducing the complexity and physical burden of manual operation and significantly improving overall efficiency.

[0017] 2. In terms of safety and stability, this stage is equipped with multiple structural safeguards. Once moved into place, the telescopic rods and anti-slip pads built into the base can be quickly extended and locked to the ground, effectively preventing the stage from sliding or shifting during lifting or carrying, ensuring structural stability during the performance. The stage platform is equipped with retractable or flip-up protective railings around its perimeter, which automatically form a barrier after the stage is raised, preventing actors or staff from accidentally falling due to working at height on the stage, significantly improving safety during high-altitude operations.

[0018] 3. The stage panels are equipped with retractable or fixed staircases on both sides, which facilitates personnel getting on and off the stage and further enhances the overall functionality and ease of use of the equipment. In summary, this invention combines outstanding mobility, precise and controllable lifting performance, and a complete safety protection mechanism. It not only significantly improves the working efficiency and adaptability of stage equipment, but also provides a systematic guarantee for its safe and stable operation in various situations, and has high practical value and promising prospects for promotion. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a front view of a rack and pinion lifting stage according to the present invention; Figure 2 This is a right-side view of a rack and pinion lifting stage according to the present invention; Figure 3 This is a left-side view of a rack and pinion lifting stage according to the present invention; Figure 4 This is a diagram of the internal rack and pinion lifting structure of a rack and pinion type lifting stage according to the present invention; In the diagram, 1. Stage board; 2. Tooth column; 3. First fixing rod; 4. Second fixing rod; 5. Mounting plate; 6. Steps; 7. Connecting rod; 8. Fixing plate; 9. Casters; 10. Telescopic rod; 11. Anti-slip plate; 12. Rotating shaft; 13. Protective rod; 14. Base; 15. Hook; 16. Lifting block; 17. Rotating rod; 18. Gearbox; 19. Dual-axis motor; 20. Connecting shaft. Detailed Implementation

[0020] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0021] like Figures 1-4 As shown, the present invention discloses a rack and pinion lifting stage, the core structure of which includes a stage plate 1 serving as the main load-bearing platform. The stage plate 1 is typically welded from high-strength aluminum alloy or steel, and its surface can be covered with anti-slip wood or rubber to meet performance requirements and ensure safety. Steps 6 are symmetrically fixed on both sides of the stage plate 1 to facilitate actors and staff entering and exiting the stage. Below the stage plate 1, at least two rack columns 2 are vertically arranged. These rack columns 2 serve as the main lifting guides and load-bearing components, typically made of 45# steel or similar high-strength alloy steel, with their surfaces precision-milled to create continuous tooth patterns. A top mounting plate 5, a rectangular steel plate, is fixedly connected to the top of the rack columns 2 by bolts or welding. This mounting plate 5 serves to connect and distribute the load. At least one first fixing rod 3 is horizontally fixed between the two top mounting plates 5, further enhancing the overall rigidity of the top structure. The bottom end of the tooth column 2 is provided with a base 14, which is usually made of box-shaped steel structure. Reinforcing ribs can be added inside to improve the load-bearing capacity. At least one second fixing rod 4 is also horizontally fixed between the two bases 14. These rods ensure the stability of the base system and prevent deformation during the lifting process.

[0022] Regarding the drive system, a motor-driven transmission assembly is mounted on the top mounting plate 5 or base 14. This transmission assembly specifically includes a lifting block 16 that meshes with the gear column 2. The lifting block 16 has a wear-resistant bushing made of copper-based or polymer material embedded inside to ensure smooth meshing with the gear column 2. The rotating rod 17 that passes through and drives the lifting block 16 is usually a smooth shaft or splined shaft structure, and its surface is hardened to improve wear resistance. The gearbox 18 that drives the rotating rod 17 is a reduction gearbox, which adopts a helical gear or planetary gear structure and has high transmission efficiency and torque output capability. The gearbox 18 is connected to the output end of the dual-axis motor 19 through the connecting shaft 20. The output shaft of the dual-axis motor 19 is fixedly connected to the connecting shaft 20 through a flexible coupling or universal coupling. This connection method can compensate for certain installation errors.

[0023] To ensure ease of stage movement, casters 9 with braking mechanisms are installed at the bottom of the base 14. These casters 9 are typically made of polyurethane or rubber and are equipped with foot-operated brakes that can be reliably locked after the stage is in place.

[0024] To further enhance stability, a fixing plate 8 is fixedly connected to the side of the base 14. A telescopic rod 10 that can be vertically extended is hinged or sleeved below the fixing plate 8. The telescopic rod 10 can adopt a hydraulic, pneumatic or mechanical spiral telescopic structure. An anti-slip plate 11 is fixedly connected to the bottom of the telescopic rod 10. The bottom of the anti-slip plate 11 is usually provided with a rubber pad or serrated anti-slip texture, which can provide additional support and anti-slip capability after the stage is in place.

[0025] In terms of safety protection, hooks 15 are fixedly installed on the side of the stage board 1 or the top mounting plate 5. One end of the protective rod 13 is provided with a buckle or pin structure that matches the hooks 15. This connection method can realize the quick fixing and release when the protective rod 13 is erected. The protective rod 13 itself is a multi-segment telescopic structure or a hinged folding structure, made of aluminum alloy or carbon steel tubing, which ensures strength and reduces weight. Its bottom is hinged to the base 14 or the stage board 1 through the rotating shaft 12, so that the protective rod 13 can be easily retracted or unfolded.

[0026] The steps 6 are fixedly connected to the bottom of the stage board 1 via a connecting rod 7 fixedly connected to one side. The steps 6 are designed to be foldable or detachable, and are usually connected by hinges for easy transportation and storage. The steps are equipped with anti-slip textures to ensure safety when going up and down.

[0027] The unique feature of this lifting stage is its synchronous lifting mechanism. The dual-axis motor 19 drives the rotating rods 17 on both sides to rotate synchronously through the gearbox 18 and the connecting shaft 20, thereby keeping the lifting block 16, which meshes with the gear column 2, in a completely synchronized motion state, thus forming a mechanical forced synchronous lifting mechanism. This design ensures that the stage panel 1 remains horizontal during the lifting process, avoiding tilting or jamming.

[0028] When the guardrail 13 rotates around the rotating shaft 12 to a vertical position, its body abuts against the side of the mounting plate 5 or the stage plate 1, forming a reliable mechanical limit. After the buckle or pin structure at one end of the guardrail 13 is connected and fixed to the hook 15, the guardrail 13, the rotating shaft 12 and the stage plate 1 together form a stable triangular rigid support structure, which greatly improves the impact resistance and overall stability of the guardrail system.

[0029] The rack and pinion lifting stage of this invention achieves stable and reliable lifting function through precise mechanical transmission and multiple safety designs, while also possessing good mobility and safety performance, making it suitable for various performance, exhibition and other occasions.

[0030] Working principle of the invention: First, staff can easily move the entire stage to the designated working position using the casters 9 with braking mechanisms under the base 14. Once in position, the telescopic rod 10 under the side fixing plate 8 of the base 14 is operated to extend it downwards, pushing the anti-slip plate 11 at the bottom into firm contact with the ground, thus significantly enhancing the overall stability and anti-slip capability of the stage. Subsequently, the protective rod 13 is rotated around the rotating shaft 12 to a vertical working position, so that its body abuts against the side of the mounting plate 5 or stage plate 1 to form a preliminary mechanical limit. Then, the buckle or pin structure at the end of the protective rod 13 is locked with the corresponding hook 15 to form a stable triangular rigid guardrail structure, effectively preventing personnel from falling from height. During the lifting control phase, the dual-axis motor 19 is started, and its output power is transmitted to the gearbox 18 through the connecting shaft 20. After deceleration and torque amplification, it drives the rotating rod 17 to rotate synchronously. The rotating rod 17 drives multiple lifting blocks 16 to move together. Each lifting block 16 is engaged with the gear column 2, thus converting the rotational motion into a smooth, vertical linear lifting motion. Driven by the lifting block 16, the gear column 2 rises or falls precisely, thereby lifting the top mounting plate 5 and the stage panel 1 to the predetermined height. Throughout the lifting process, the mechanical forced synchronization system consisting of the dual-axis motor 19 and the gearbox 18 ensures that the movement of the gear columns 2 on both sides is completely consistent, avoiding stage tilting or jamming. Staff and performers can safely get on and off the stage via the steps 6 on both sides of the stage. The system is reliable in structure, easy to operate, and takes into account mobility, operational stability, and personnel safety.

[0031] Example 1: This embodiment describes a medium-sized rack and pinion lifting stage for professional theaters.

[0032] The stage panel 1 is constructed of high-strength steel, measuring 6m x 4m, and covered with non-slip wooden flooring to meet the needs of dance performances. Four high-strength alloy steel toothed columns 2 are symmetrically positioned beneath it. The tops of the toothed columns 2 are connected via a top mounting plate 5 and reinforced with two first fixing rods 3. The base 14 is a box-shaped welded structure, connected as a whole by two second fixing rods 4, and directly fixed to the existing stage pit in the theater, eliminating the need for casters 9 for greater stability. The transmission assembly is mounted on the base 14, employing a high-power dual-axis motor 19 in conjunction with a planetary reduction gearbox 18. Through a connecting shaft 20, it drives the rotating rods 17 on both sides to rotate synchronously. The lifting blocks 16 on the rotating rods 17 precisely mesh with the toothed columns 2, enabling stepless lifting of the stage panel 1 within a range of 0 to 1.5 meters. The lifting speed can be precisely controlled between 0.01m / s and 0.1m / s, operating smoothly with noise levels below 55 decibels, fully meeting the quiet requirements during performances. The protective rod 13 is a retractable multi-segment structure made of stainless steel, hinged to the edge of the stage board 1 via a rotating shaft 12. Before the performance, it is pulled up to a vertical position, with the rod body abutting against the side of the stage board 1 for a limit. Then, the pin at the top is inserted into the hook 15 on the side of the stage board 1 to form a stable triangular rigid guardrail. The steps 6 on both sides of the stage are fixed steel structures with anti-slip stripes on the surface.

[0033] This embodiment is particularly suitable for large-scale theatrical performances that require frequent changes in stage height, and its high precision and quiet operation ensure the performance effect.

[0034] Example 2: This embodiment describes a mobile lifting platform for commercial showrooms or museums, emphasizing its flexibility and rapid deployment capabilities.

[0035] The stage platform 1 measures 3m x 2m and features a lightweight aluminum alloy frame with a composite panel surface to reduce overall weight. Two geared columns 2 are positioned beneath it, and four polyurethane casters 9 with dual braking systems (foot brake + universal locking) are mounted on the bottom of the base 14, allowing for easy movement of the entire platform by a single person. The telescopic rod 10 beneath the fixed plate 8 employs a manual mechanical spiral telescopic structure. Turning the crank drives the anti-slip plate 11 beneath the telescopic rod 10 to press firmly against the ground, providing stable support for the platform and preventing movement during lifting, lowering, or under load. The transmission system uses a low-power dual-axis servo motor 19, coupled with a precision reduction gearbox 18, ensuring precise height movement of the lifting block 16 on the geared columns 2, with a positioning accuracy of ±0.5mm. This platform can be used for displaying precision instruments, and the stage platform 1 can be smoothly raised and lowered to a height of 0.8 meters, providing optimal visual appeal for the exhibits. The protective rod 13 is a hinged, foldable aluminum alloy rod that can be laid flat at the edge of the stage platform 1 when not in use, saving space. Step 6 is a lightweight and detachable design, quickly connected to connecting rod 7 via a pin. This embodiment perfectly meets the needs of modern exhibition halls for flexible layouts and adaptable spaces.

[0036] Example 3: This embodiment describes a heavy-duty lifting stage for outdoor weddings, music festivals, and other events, emphasizing load-bearing capacity, environmental adaptability, and safety.

[0037] The stage platform 1 is a reinforced steel structure, measuring 8m x 5m, with a load-bearing capacity exceeding 1000kg. It can accommodate multiple actors and large props simultaneously. The base 14 is welded from heavy-duty H-beams and equipped with six industrial-grade heavy-duty rubber casters 9, suitable for movement on uneven outdoor ground. To cope with soft outdoor ground, the telescopic rod 10 under the fixed platform 8 is hydraulically driven. The hydraulic cylinder pushes down an extra-large anti-slip plate 11, which has sharp anti-slip teeth on the bottom to firmly grip the ground and provide excellent anti-tipping ability. The transmission assembly uses a high-torque dual-shaft motor 19 and a heavy-duty gearbox 18, providing strong power. Even under off-center load conditions, the mechanical forced synchronization mechanism ensures smooth stage lifting and lowering. The protective rod 13 is a thickened steel pipe with a large diameter, and its bottom rotating shaft 12 is also reinforced. The triangular support structure formed with the stage platform 1 is extremely stable and can effectively prevent accidental impacts from crowds. Considering efficiency for outdoor events, Step 6 features a large, integrated, foldable design, assisted by hydraulic rods for unfolding and folding, ready for immediate use once unfolded. This embodiment fully meets the stringent requirements of large-scale outdoor events for stage strength, stability, and efficient deployment.

[0038] This invention relates to a rack and pinion lifting stage, which achieves smooth and precise lifting of the stage panels through precise engagement between the rack and pinion and a transmission assembly consisting of a dual-axis motor, gearbox, and rotating rod. The stage boasts excellent mobility thanks to casters with braking mechanisms at the base and a retractable, anti-slip structure, allowing for rapid deployment and stable positioning. For safety, the stage is equipped with deployable guardrails around its perimeter, which, by locking with hooks and forming a rigid triangular support with the stage body, effectively prevent falls. Simultaneously, a mechanical forced synchronization mechanism ensures smooth lifting without tilting or jamming. Furthermore, foldable or detachable steps integrated on both sides of the stage further enhance the equipment's convenience and functionality. In summary, this lifting stage integrates a highly efficient transmission system, flexible deployment, multiple safety protections, and user-friendly design, fully meeting the comprehensive needs for reliability, adaptability, and safety of stage equipment in various situations.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A rack and pinion lifting stage, comprising a stage panel (1), characterized in that, The stage board (1) is fixedly provided with steps (6) on both sides. At least two toothed columns (2) are provided below the stage board (1). The top of the toothed column (2) is fixedly connected to a top mounting plate (5). At least one first fixing rod (3) is fixedly connected between the top mounting plates (5). The bottom of the toothed column (2) is provided with a base (14). At least one second fixing rod (4) is fixedly connected between the bases (14). A transmission assembly driven by a motor is installed on the top mounting plate (5) or the base (14). The transmission assembly meshes with the toothed column (2) to drive the stage board (1) to rise and fall. The periphery of the stage board (1) is also provided with a protective rod (13) that can be unfolded or retracted.

2. The rack and pinion lifting stage according to claim 1, characterized in that, The bottom of the base (14) is equipped with casters (9) with brake mechanisms.

3. A rack and pinion lifting stage according to claim 1, characterized in that, A fixing plate (8) is fixedly connected to the side of the base (14), and a telescopic rod (10) that can be vertically extended is hinged or sleeved below the fixing plate (8). An anti-slip plate (11) is fixedly connected to the bottom end of the telescopic rod (10).

4. A rack and pinion lifting stage according to claim 1, characterized in that, The stage board (1) or the top mounting plate (5) is fixedly provided with a hook (15) on its side, and one end of the protective rod (13) is provided with a buckle or pin structure that is compatible with the hook (15) to fix the protective rod (13) when it is erected.

5. A rack and pinion lifting stage according to claim 1, characterized in that, The transmission assembly includes a lifting block (16) meshing with the gear column (2), a rotating rod (17) passing through and driving the lifting block (16), and a gearbox (18) driving the rotating rod (17). The gearbox (18) is connected to the output end of a dual-axis motor (19) via a connecting shaft (20).

6. A rack and pinion lifting stage according to claim 5, characterized in that, The output shaft of the dual-axis motor (19) is fixedly connected to the connecting shaft (20) via a coupling. The gearbox (18) is a reduction gearbox, and its output end is connected to the rotating rod (17).

7. A rack and pinion lifting stage according to claim 1, characterized in that, The steps (6) are fixedly connected to the bottom of the stage board (1) via a connecting rod (7) fixedly connected to one side. The steps (6) are foldable or detachable.

8. A rack and pinion lifting stage according to claim 1, characterized in that, The protective rod (13) is a multi-segment telescopic structure or a hinged folding structure, and its bottom is hinged to the base (14) or stage board (1) through a rotating shaft (12).

9. A rack and pinion lifting stage according to claim 5 or 6, characterized in that, The dual-axis motor (19) drives the rotating rods (17) on both sides to rotate synchronously through the gearbox (18) and connecting shaft (20), thereby making the lifting block (16) meshing with the gear column (2) move synchronously, thus forming a mechanical forced synchronous lifting mechanism.

10. A rack and pinion lifting stage according to claim 4, characterized in that, When the protective rod (13) rotates around the rotating shaft (12) to a vertical position, its rod body abuts against the side of the mounting plate (5) or the stage board (1) to form a mechanical limit; when the buckle or pin structure at one end of the protective rod (13) is connected and fixed to the hook (15), the protective rod (13), the rotating shaft (12) and the stage board (1) together form a stable triangular rigid support structure.

Images