Lifting device and AGV (Automatic Guided Vehicle) applying same
By combining worm gear drive and linear guide rail, the shortcomings of AGV lifting devices in heavy load, high-precision positioning and self-locking performance are solved, achieving high load capacity and stable lifting, and improving the structural reliability and accuracy of the lifting device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-17
AI Technical Summary
Existing AGV lifting devices are inadequate in terms of load, lifting accuracy control, and self-locking performance, making it difficult to meet the comprehensive requirements of heavy load, high-precision positioning, and power failure safety in industrial scenarios.
The lifting mechanism adopts a worm gear drive-based design, combined with linear guide rail guidance. It features multi-stage transmission optimization and structural reinforcement, including a combination of servo motor, worm gear, worm, gear shaft, rack and pinion, and linear guide rail, to achieve high-precision, self-locking, and stable lifting.
It significantly improves load capacity, ensures no deformation under heavy load, maintains consistent lifting force and positioning accuracy, and achieves stable lifting of loads from 500kg to 2 tons with a positioning accuracy of no more than ±0.2mm.
Smart Images
Figure CN224000981U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a novel lifting device and an AGV using the device, belonging to the field of logistics warehousing and automation control. Background Technology
[0002] Currently, various handling devices, such as unmanned automated guided vehicles (AGVs), are widely used in logistics warehousing and automated production sites to carry and transport various goods to designated workstations.
[0003] In industrial production processes, AGV lifting devices commonly employ transmission mechanisms such as hydraulic cylinders, lead screws, or chains. However, these mechanisms have significant shortcomings in terms of load capacity, lifting accuracy control, and self-locking performance. Specifically, hydraulic systems are complex in structure and pose a risk of leakage, resulting in high maintenance costs; lead screw transmission mechanisms are prone to wear and deformation under high loads, leading to a decrease in lifting control accuracy; and chain transmission mechanisms, due to their flexibility, are prone to cumulative errors. Existing lifting devices struggle to achieve a balance between load capacity, accuracy, and safety, failing to meet the comprehensive requirements of heavy-duty applications (e.g., over 500 kg), high-precision positioning, and power-off safety in industrial settings.
[0004] In view of the above, this patent application is hereby filed. Utility Model Content
[0005] The lifting device and AGV using the device described in this application aim to solve the problems existing in the prior art by proposing a lifting mechanism based on worm gear transmission, in order to achieve the design objectives of large load, high precision, self-locking and stable lifting through multi-stage transmission optimization and structural reinforcement design.
[0006] To achieve the above design objectives, the lifting device includes a base, on which a servo motor, two sets of fixed seats, and two sets of fixed supports are fixedly connected. The servo motor is driven by a worm gear through a coupling. The two ends of the worm gear are located between the two sets of fixed seats. The worm gear is meshed with a worm gear sleeved on a gear shaft. The two ends of the gear shaft are located between the two sets of fixed supports. At least one set of gears is sleeved on the gear shaft, and each set of gears is meshed with a set of racks fixed vertically on the lifting cover.
[0007] Furthermore, one end of the worm gear is mounted on a fixed base via a tapered roller bearing, and the other end is mounted on a fixed base via a deep groove ball bearing.
[0008] Furthermore, both ends of the gear shaft are respectively encapsulated in a fixed support by a set of bearing shafts.
[0009] Furthermore, a set of linear guide rails is vertically installed on each set of fixed supports, and the slider fixedly installed on the lifting cover is engaged with the linear guide rails.
[0010] Based on the structural design of the lifting device described above, this application proposes an AGV, which includes a vertically movable lifting cover, which is driven by the lifting device to achieve vertical lifting.
[0011] As described above, the lifting device and the AGV using the device described in this application have the following advantages and beneficial effects:
[0012] 1. This application employs a worm gear transmission mechanism, which has a large load capacity. This high reduction ratio design significantly improves the output torque and has optimized meshing surface characteristics, enabling it to stably bear loads from 500 kg to 2 tons; 2. This application adopts a linear guide rail guiding method, which can improve bending stiffness by more than 30%, thereby ensuring stability under heavy loads.
[0013] No deformation occurred;
[0014] 3. The worm gear transmission mechanism adopted in this application can achieve a lifting motor current fluctuation of less than 5% at different heights, ensuring the consistency and constant performance of lifting force.
[0015] 4. The gear and rack mechanism adopted in this application is embedded in the guide support module, which can achieve the backlash elimination design and also eliminate the backlash of reverse transmission, ensuring that the positioning accuracy of the lifting component throughout the entire lifting stroke does not exceed ±0.2mm. Attached Figure Description
[0016] The present application will now be further illustrated with reference to the following figures.
[0017] Figure 1 This is a schematic diagram of an AGV using the lifting device described in this application;
[0018] Figure 2 This is a schematic diagram of the lifting device.
[0019] Figure 3 This is a top-down schematic diagram of the turbine worm gear mechanism;
[0020] Figure 4 Is it like this? Figure 3 A schematic diagram of the structure from the other side;
[0021] Figure 5 Is it like this? Figure 2 A schematic diagram of the vertical cross-section of the structure shown; Detailed Implementation
[0022] Example 1, such as Figures 1 to 5 As shown, this application proposes a novel lifting device including a base 101, on which a servo motor 102, two sets of fixed seats 201 and two sets of fixed supports 301 are fixedly connected.
[0023] The servo motor 102 is driven to connect to the worm gear 203 via the coupling 103. The two ends of the worm gear 203 are located between two sets of fixed seats 201. The worm gear 203 is meshed with the worm wheel 205 sleeved on the gear shaft 307. The two ends of the gear shaft 307 are located between two sets of fixed supports 301. Driven by the servo motor 102, the worm gear 203 drives the worm wheel 205 to rotate, which further drives the gear shaft 307 to reciprocate and rotate on the fixed axis.
[0024] To achieve both axial anti-movement and shaft end connection stability, one end of the worm gear 203 is encapsulated in the fixed seat 201 via a tapered roller bearing 202, and the other end is encapsulated in the fixed seat 201 via a deep groove ball bearing 204.
[0025] Similarly, both ends of the gear shaft 307 are respectively encapsulated in the fixed support 301 by a set of bearings 302.
[0026] Two sets of gears 303 are mounted on the gear shaft 307. Each set of gears 303 is meshed with a set of racks 304 that are fixed vertically on the lifting cover 306. When the gear shaft 307 rotates on the fixed axis, the gears 303 drive the racks 304 to rise and fall vertically, thereby driving the lifting cover 306 to rise and fall as a whole, ultimately enabling the AGV100 to carry goods and perform lifting operations.
[0027] To improve the stability of the vertical lifting of the lifting hood 306, a set of linear guide rails 305 are vertically installed on each set of fixed supports 301. The slider 308, which is fixedly installed on the lifting hood 306, is engaged with the linear guide rails 305. When the rack 304 drives the lifting hood 306 to reciprocate, the overall lifting is smooth through the engagement of the slider 308 on the linear guide rails 305, and the overall lifting load capacity of the AGV100 is further improved.
[0028] In practical applications, relying on the driving force generated by the servo motor 102, the worm gear 203 is driven to rotate through the coupling 103, which in turn drives the turbine 205 to rotate. The gear 303 rotates synchronously with the turbine 205. The gear 303 drives the rack 304 to roll, and under the constraint of the linear guide rail 305, it generates a movement perpendicular to the base 101, ultimately realizing the lifting action of the lifting cover 306.
[0029] Based on the innovative structural design of the lifting device described above, this application proposes to apply the lifting device to an AGV100. The AGV100 includes a vertically movable lifting cover 306, which is driven and connected by the lifting device to achieve vertical lifting and to carry and transport various types of goods.
[0030] As described above, through the detailed description of the embodiments, this application, through the efficient combination of worm gear transmission and rack and pinion, significantly improves the load capacity and structural reliability of the lifting device while ensuring high precision and self-locking function. Its modular design and intelligent expansion capabilities can be widely applied to AGV heavy-duty handling scenarios in fields such as automotive manufacturing, heavy machinery, and aerospace, demonstrating significant economic benefits and industry promotion value.
Claims
1. A lifting device, characterized by: The base is fixedly connected with a servo motor, two groups of fixing seats and two groups of fixing supports; The servo motor is connected with the worm gear through a shaft coupling, the two ends of the worm gear are arranged between the two groups of fixing seats, the worm gear is connected with a worm set on the gear shaft, and the two ends of the gear shaft are arranged between the two groups of fixing supports; At least one group of gears is arranged on the gear shaft, and each group of gears is connected with a group of racks fixed on the jacking cover along the vertical direction.
2. The lifting device of claim 1, wherein: One end of the worm gear is arranged in the fixing seat through a tapered roller bearing, and the other end is arranged in the fixing seat through a deep groove ball bearing.
3. A lifting arrangement according to claim 1 or 2, characterised in that: The two ends of the gear shaft are respectively arranged in the fixing supports through a group of bearings.
4. The lifting device of claim 1, wherein: A group of linear guides are arranged on each group of fixing supports in the vertical direction, and a sliding block fixedly installed on the jacking cover is connected with the linear guide.
5. An AGV using the lifting device according to any one of claims 1 to 4, characterized in that: The jacking cover is vertically movably connected, and the jacking cover is driven by the lifting device to realize vertical lifting.