High-precision positioning building elevator

Abstract

The invention relates to the technical field of lifters, in particular to a high-precision positioning building lifter which comprises a base, a guide rail frame is mounted on the upper end face of the base, a cage is mounted on the guide rail frame, a secondary lifting assembly is mounted on the guide rail frame and comprises a connecting table, and the connecting table is connected with the guide rail frame; the lifting platform is slidably connected with the connecting platform; the cage is mounted on the lifting platform; the driving part is mounted on the connecting table for driving the lifting table to lift; a plurality of assembly plates are mounted on the lifting table and comprise vertical plates and horizontal plates, an assembly frame extends from the upper end face of the connecting table, the assembly plates and the assembly frame are fixed in a matched mode, mounting plates extend from the upper ends of the assembly plates, and the mounting plates and the cage are fixed. And through a multi-stage transmission and counterweight system of the secondary lifting assembly, the positioning precision of the cage is remarkably improved. When the secondary lifting assembly operates, the driving piece outputs power, and the power is transmitted through the chain wheel system to drive the lifting table to do small-range lifting motion relative to the connecting table, so that the position of the cage is finely adjusted.

Description

Technical Field

[0001] This invention relates to the technical field of elevators, and in particular to a high-precision positioning construction elevator. Background Technology

[0002] With the widespread adoption of super high-rise buildings and precision prefabricated construction, the positioning accuracy requirements for construction hoists have increased from the traditional centimeter level to the millimeter level. In scenarios such as large curtain wall installation, steel structure connection, and equipment floor construction, the hoist cage needs to achieve repeatability within ±5mm at heights of over 20 meters to ensure construction quality and efficiency. However, traditional hoists, due to accumulated errors in mechanical transmission, insufficient compensation for load fluctuations, and limited vibration suppression capabilities, struggle to meet high-precision positioning requirements, becoming a bottleneck restricting the intelligent construction of super high-rise buildings.

[0003] Currently, mainstream construction hoists are mainly divided into two categories: A rack and pinion lift uses a motor to drive gears that mesh with a rack to raise and lower the cage. Its structure includes a base, guide rails, the cage, and a single-stage drive system, relying on the gear and rack clearance for precise control.

[0004] Hydraulic cylinder lifts use a hydraulic system to extend and retract cylinders to achieve lifting and lowering. The structure includes a hydraulic station, cylinders, and guide rails. Positioning accuracy is significantly affected by hydraulic compressibility and leakage.

[0005] Both schemes are single-stage direct drive modes, with short transmission chains but lacking fine-tuning capabilities. The cage and guide rail are rigidly connected, and load changes or start-stop impacts can easily cause vibrations, leading to positioning deviations. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, one of the objectives of this invention is to provide a construction elevator with high positioning accuracy.

[0007] The above-mentioned objective of this invention is achieved through the following technical solutions: A high-precision positioning construction hoist includes a base, a guide rail frame mounted on the upper surface of the base, a cage mounted on the guide rail frame, and a secondary lifting assembly mounted on the guide rail frame. The secondary lifting assembly includes... A connecting platform, which is connected to the guide rail frame; A lifting platform is slidably connected to the connecting platform, and the cage is installed on the lifting platform; A drive unit, installed on the connecting platform, is used to drive the lifting platform to move up and down; The lifting platform is equipped with several assembly plates, each including a vertical plate and a horizontal plate. An assembly frame extends from the upper surface of the connecting platform, and the assembly plates are fixed together with the assembly frame. An installation plate extends from the upper surface of the assembly plates and is fixed to the cage.

[0008] As a specific embodiment of the high-precision positioning construction hoist disclosed in this invention, the output end of the drive component is connected to multiple sets of first sprockets, a rotating rod is installed on the connecting platform, a second sprocket rotates synchronously on the rotating rod, the first sprockets and the second sprockets are driven by a chain, a lifting sprocket is synchronously connected to the rotating rod, a transmission sprocket is installed at the lower end of the connecting platform, the lifting sprocket and the transmission sprocket are driven by a chain, and the lifting platform is fixedly connected to the chain between the lifting sprocket and the transmission sprocket.

[0009] As a specific embodiment of the high-precision positioning building elevator disclosed in this invention, the outer diameter of the first sprocket in each group is different.

[0010] As a specific embodiment of the high-precision positioning building elevator disclosed in this invention, a number of transmission rollers are rotatably installed on the lifting platform.

[0011] In one specific embodiment of the high-precision positioning construction hoist disclosed in this invention, the transmission roller rotates synchronously via a chain.

[0012] As a specific embodiment of the high-precision positioning building elevator disclosed in this invention, a counterweight is slidably connected to the connecting platform, and the counterweight is connected to the lifting platform through a pulley system.

[0013] As a specific embodiment of a high-precision positioning construction elevator disclosed in this invention, the pulley block includes a plurality of first pulleys installed on the upper end of the lifting platform, a plurality of second pulleys on the connecting platform, and a plurality of third pulleys installed on the counterweight.

[0014] As a specific embodiment of the high-precision positioning construction elevator disclosed in this invention, the counterweight includes a counterweight shell that is slidably connected to the connecting platform, and a plurality of counterweight blocks are placed inside the counterweight shell.

[0015] As a specific embodiment of a high-precision positioning construction hoist disclosed in this invention, the lifting platform includes a lifting shell that is slidably connected to the connecting platform. The lifting shell includes a vertical frame and a horizontal frame. A slider is installed on the vertical frame, and the slider is slidably connected to the connecting platform.

[0016] As a specific embodiment of the high-precision positioning construction hoist disclosed in this invention, a reinforcing member is provided between the vertical frames. The reinforcing member includes a vertical connecting rod, and a horizontal plate is formed on the lower end face of the vertical connecting rod. A reinforcing rib is installed between the horizontal plate and the vertical connecting rod.

[0017] In summary, the present invention has at least one of the following beneficial technical effects: 10. The lifting platform disclosed in this invention integrates a secondary lifting assembly on the guide rail frame. This secondary lifting assembly, through a multi-stage transmission and counterweight system, significantly improves the positioning accuracy of the hoist cage. During operation, the drive unit outputs power, which is transmitted via a sprocket system to drive the lifting platform to perform a small-range lifting motion relative to the connecting platform, thereby fine-tuning the position of the hoist cage. Throughout the process, the structure is compact, requiring no additional components. The working principle is based on mechanical transmission and a sliding mechanism, ensuring a repeatability error of less than ±1mm, making it suitable for high-precision construction scenarios.

[0018] 11. The outer diameter of the first sprocket in the sprocket system is not consistent. Different outer diameters of the first sprocket are selected to achieve different speed outputs, so as to adapt to different adjustment conditions. 12. The transmission rollers on the lifting platform rotate synchronously via a chain driven by the same motor. The transmission rollers are evenly distributed on the surface of the lifting platform, forming a continuous rolling surface. When disassembling the cage, the motor drives the chain to rotate all the transmission rollers at the same speed, and the cage can be pushed away from the lifting platform without the need for additional tools. This process keeps the cage moving horizontally and prevents collision damage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of a high-precision positioning building elevator disclosed in this invention; Figure 2 This is a schematic diagram of the structure of the secondary lifting component of an embodiment of a high-precision positioning building elevator disclosed in this invention; Figure 3 This is a partial structural diagram of the lifting platform of an embodiment of a high-precision positioning building elevator disclosed in this invention; Figure 4 This is a schematic diagram of the drive component of an embodiment of a high-precision positioning building elevator disclosed in this invention; Figure 5 This is a schematic diagram of the counterweight and lifting platform of an embodiment of a high-precision positioning building elevator disclosed in this invention.

[0020] In the picture, 1. Base; 2. Guide rail frame; 3. Hanging cage; 4. Secondary lifting assembly; 41. Connecting platform; 411. Assembly rack; 42. Lifting platform; 421. Lifting housing; 4211. Vertical frame; 4212. Horizontal frame; 422. Reinforcing member; 4221. Vertical connecting rod; 4222. Horizontal plate; 4223. Reinforcing rib; 423. Drive roller; 424. Assembly plate; 4241. Vertical plate; 4242. Horizontal plate; 4243. Mounting plate; 43. Driving component; 431. First sprocket; 432. Second sprocket; 433. Lifting sprocket; 434. Transmission sprocket; 44. Counterweight; 441. Counterweight shell; 442. Counterweight block; 443. First pulley; 444. Second pulley; 445. Third pulley. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Reference Figure 1-5 This invention discloses a high-precision positioning construction hoist, comprising a base 1, a guide rail frame 2, and a cage 3. The base 1 is placed on the ground or building structure, providing stable support. The guide rail frame 2 is installed on the upper surface of the base 1, serving as a lifting guide rail; the cage 3 is used to carry goods or personnel.

[0023] The elevator disclosed in this invention integrates a secondary lifting assembly 4 on the guide rail frame 2. The secondary lifting assembly 4 includes a connecting platform 41, a lifting platform 42, and a driving component 43.

[0024] The connecting platform 41 and the guide rail frame 2 are fixedly connected by high-strength bolts or welding to ensure overall connection strength and rigidity. The main body of the connecting platform 41 adopts a box-shaped structure, and the transmission mechanism can be arranged inside the box-shaped structure. An assembly frame 411 extends integrally from the upper end face, which is used to install the drive component 43. The connecting platform 41 serves as a reference platform for secondary lifting, providing an installation foundation for high-precision lifting. The lower area of ​​the connecting platform 41 is provided with a slide rail groove for sliding with the lifting platform 42.

[0025] The lifting platform 42 is slidably connected to the slide rail groove of the connecting platform 41 via a slider. The cage 3 is directly installed on the lifting platform 42, achieving slight vertical movement. The main body of the lifting platform 42 is the lifting shell 421, which includes a vertical frame 4211 and a horizontal frame 4212. A slider is welded to the inner side of the vertical frame 4211 to ensure smooth sliding. A reinforcing member 422 is provided between the vertical frames 4211. This reinforcing member 422 consists of a vertical connecting rod 4221, a horizontal plate 4222, and reinforcing ribs 4223. The reinforcing ribs 4223 are arranged in a triangular pattern to improve bending stiffness. The components of the reinforcing member 422 can be fixed by welding or by bolts. The reinforcing member 422 enhances the torsional resistance of the lifting platform 42, preventing deformation under load, thereby maintaining the horizontal positioning accuracy of the cage 3. Actual measurements show that the deviation compensation capability is over 95% under uneven load.

[0026] To facilitate the assembly and disassembly of the hoisting cage 3, several drive rollers 423 are installed on the upper surface of the lifting platform 42. These drive rollers 423 rotate synchronously via a single chain to form a rolling support surface, driven by a common motor. When disassembling the hoisting cage 3, the user can start the motor to rotate all the drive rollers 423 in the same direction, allowing the hoisting cage 3 to easily slide off the lifting platform 42, reducing manual handling errors and improving maintenance efficiency. In some feasible embodiments, the surface of the drive rollers 423 can be chrome-plated to enhance their wear resistance and reduce resistance.

[0027] The drive unit 43 is fixedly mounted on the side of the connecting platform 41, and its output end is connected to multiple sets of first sprockets 431. The drive unit 43 can be a servo motor or a geared motor, etc. The outer diameter of each set of first sprockets 431 is different, for example, the outer diameter ranges from 30mm to 80mm, forming a stepped gear ratio. This design achieves different speed outputs by selecting first sprockets 431 with different outer diameters to adapt to different adjustment conditions.

[0028] A rotating rod is mounted on the assembly frame 411, and a second sprocket 432 is synchronously mounted on the rotating rod. During use, the drive component 43 outputs power, which is transmitted to the second sprocket 432 via the first sprocket 431. It should be understood that the first sprocket 431 and the second sprocket 432 can be driven by a double-row roller chain, and the chain pretension is adjustable to reduce transmission backlash.

[0029] A lifting sprocket 433 is synchronously connected to the rotating rod, and a transmission sprocket 434 is installed at the corresponding position at the lower end of the connecting platform 41. The lifting sprocket 433 and the transmission sprocket 434 are driven by a chain. The lifting platform 42 is fixedly connected to the chain segment between the lifting sprocket 433 and the transmission sprocket 434, and a special clamping seat can be provided on the chain segment. During operation, the drive unit 43 converts the rotational motion into linear displacement of the lifting platform 42 through the coordination of multiple sets of sprockets.

[0030] As a specific embodiment of the construction hoist disclosed in this invention, a plurality of assembly plates 424 are installed on the lifting platform 42. Each assembly plate 424 includes an integrally formed vertical plate 4241 and a horizontal plate 4242. The vertical plate 4241 and the horizontal plate 4242 have round or oblong holes for fine-tuning the installation position. It should be understood that shock-absorbing pads can be provided on the horizontal plate 4242. An mounting plate 4243 extends from the upper end of the assembly plate 424, and the mounting plate 4243 is fixed to the bottom of the cage 3 by high-strength bolts. When the cage 3 needs to be replaced, the assembly plate 424 can slide out along the assembly frame 411 after loosening the bolts, without disassembling the entire lifting mechanism. At the same time, the horizontal plate 4242 acts as a buffer interface to absorb the vibration of the cage 3 during operation, improve positioning stability, and reduce cumulative errors.

[0031] A counterweight 44 is slidably connected to the connecting platform 41, and the counterweight 44 is linked to the lifting platform 42 via a pulley system. The counterweight 44 includes a counterweight shell 441, which forms a sealed counterweight cavity with a wall thickness of 5mm and anti-corrosion treatment. Multiple counterweight blocks 442 can be placed inside the counterweight cavity. The counterweight blocks 442 can be standardized cast iron blocks, each weighing 20kg, and can be increased or decreased according to the load. The pulley system includes several first pulleys 443 installed on the upper end of the lifting platform 42, several second pulleys 444 on the connecting platform 41, and several third pulleys 445 installed on the counterweight 44. Specifically, but not limited to, the first pulleys 443 can be deep groove ball bearing pulleys to reduce friction, and the second pulleys 444 can be guide grooves with polyurethane pads to reduce noise. All pulleys are connected in series by steel wire ropes to form a closed-loop system. When the lifting platform 42 rises, the counterweight 44 descends synchronously, and vice versa. This balancing design reduces the drive load by more than 50% and makes the movement smoother. The modular design of the counterweight 442 allows for real-time adjustment of the weight matching to adapt to different cage loads 3, avoiding positioning overshoot due to inertia and ensuring stopping position accuracy.

[0032] The implementation principle of this embodiment is as follows: The lifting platform disclosed in this invention integrates a secondary lifting component 4 on the guide rail frame 2. The secondary lifting component 4 significantly improves the positioning accuracy of the cage 3 through a multi-stage transmission and counterweight system. When the secondary lifting component 4 is running, the drive component 43 outputs power, which is transmitted through the sprocket system to drive the lifting platform 42 to perform a small range of lifting and lowering movements relative to the connecting platform 41, thereby fine-tuning the position of the cage 3. Throughout the process, the structure is compact, with no additional components added. The working principle is based on mechanical transmission and sliding mechanism, ensuring that the repeatability positioning accuracy error is less than ±1mm, making it suitable for high-precision building construction scenarios.

[0033] Simultaneously, the transmission rollers 423 on the lifting platform 42 rotate synchronously via a chain driven by the same motor. The transmission rollers 423 are evenly distributed on the surface of the lifting platform 42, forming a continuous rolling surface. When disassembling the cage 3, the motor-driven chain rotates all the transmission rollers 423 at the same speed, allowing the cage 3 to be pushed away from the lifting platform 42 without additional tools. This process maintains the horizontal movement of the cage 3, preventing damage from impacts. Furthermore, the inconsistent outer diameter design of the first sprocket 431 in the sprocket system, combined with the low backlash characteristics of the chain drive, provides higher torque in the low-speed fine-tuning section. Using first sprockets 431 with different outer diameters achieves different speed outputs to adapt to different adjustment conditions. This not only improves response speed but also reduces oscillations during stopping, making the positioning of the cage 3 more precise.

[0034] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-precision positioning construction hoist, comprising a base (1), wherein a guide rail frame (2) is mounted on the upper surface of the base (1), and a cage (3) is mounted on the guide rail frame (2), characterized in that: The guide rail frame (2) is equipped with a secondary lifting assembly (4), which includes, A connecting platform (41) is connected to the guide rail frame (2); The lifting platform (42) is slidably connected to the connecting platform (41), and the cage (3) is installed on the lifting platform (42). A drive unit (43) is installed on the connecting platform (41) to drive the lifting platform (42) to rise and fall; The lifting platform (42) is equipped with several assembly plates (424), each assembly plate (424) including a vertical plate (4241) and a horizontal plate (4242). An assembly frame (411) extends from the upper surface of the connecting platform (41). The assembly plate (424) is fixed to the assembly frame (411). An installation plate (4243) extends from the upper end of the assembly plate (424) and is fixed to the cage (3).

2. The high-precision positioning construction hoist according to claim 1, characterized in that: The output end of the drive unit (43) is connected to multiple sets of first sprockets (431). A rotating rod is installed on the connecting platform (41). A second sprocket (432) rotates synchronously on the rotating rod. The first sprocket (431) and the second sprocket (432) are driven by a chain. A lifting sprocket (433) is synchronously connected to the rotating rod. A transmission sprocket (434) is installed at the lower end of the connecting platform (41). The lifting sprocket (433) and the transmission sprocket (434) are driven by a chain. The lifting platform (42) is fixedly connected to the chain between the lifting sprocket (433) and the transmission sprocket (434).

3. A high-precision positioning construction hoist according to claim 2, characterized in that: The outer diameter of the first sprocket (431) in each group is different.

4. A high-precision positioning construction hoist according to claim 1, characterized in that: Several transmission rollers (423) are rotatably mounted on the lifting platform (42).

5. A high-precision positioning construction hoist according to claim 4, characterized in that: The drive roller (423) rotates synchronously via a chain.

6. A high-precision positioning construction hoist according to claim 1, characterized in that: A counterweight (44) is slidably connected to the connecting platform (41), and the counterweight (44) is connected to the lifting platform (42) through a pulley system.

7. A high-precision positioning construction hoist according to claim 6, characterized in that: The pulley assembly includes a plurality of first pulleys (443) installed on the upper end of the lifting platform (42), a plurality of second pulleys (444) on the connecting platform (41), and a plurality of third pulleys (445) installed on the counterweight (44).

8. A high-precision positioning construction hoist according to claim 7, characterized in that: The counterweight (44) includes a counterweight shell (441) that is slidably connected to the connecting platform (41), and a plurality of counterweight blocks (442) are placed inside the counterweight shell (441).

9. A high-precision positioning construction hoist according to any one of claims 1-8, characterized in that: The lifting platform (42) includes a lifting shell (421) that is slidably connected to the connecting platform (41). The lifting shell (421) includes a vertical frame (4211) and a horizontal frame (4212). A slider is installed on the vertical frame (4211), and the slider is slidably connected to the connecting platform (41).

10. A high-precision positioning construction hoist according to claim 1, characterized in that: A reinforcing member (422) is provided between the vertical frames (4211). The reinforcing member (422) includes a vertical connecting rod (4221). A horizontal plate (4222) is formed on the lower end face of the vertical connecting rod (4221). A reinforcing rib (4223) is installed between the horizontal plate (4222) and the vertical connecting rod (4221).

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