Multi-linkage Lifting Device for High Bearing Capacity
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Solution Overview
Problem
Existing lifting solutions, such as single and multiple lead screw lifting methods, face challenges in achieving a large lifting bearing capacity while maintaining low costs and high assembly accuracy.
Innovation Solution
A lifting device comprising a power component and a driving shaft connected to first and second swing arms, which are hinged with multi-linkage mechanisms. This configuration allows for coordinated lifting of a platform, enhancing lifting capacity and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single lead screw lifting method is used, then the structure is simple, but the lifting bearing capacity is limited and processing cost increases when capacity needs to be increased
Solution Approach 1:
The lifting mechanism is divided into multiple independent lead screws (at least two) that work simultaneously to lift the platform. Each lead screw independently supports a portion of the total load, thereby increasing the overall lifting bearing capacity while maintaining relatively simple individual component structures.
Solution Approach 2:
Multiple lead screws are combined to work together in a synchronized manner, merging their individual lifting capabilities to achieve a greater total lifting capacity. The lead screws are integrated with a common platform and controlled by a unified control system.
2Force
If multiple lead screws lifting method is used to increase bearing capacity, then lifting capacity increases, but assembly accuracy requirements and processing cost increase
Solution Approach 1:
A sensor system is implemented to detect the position and status of each lead screw in real-time, providing feedback to the control system. This feedback mechanism enables the control system to adjust and synchronize the operation of multiple lead screws, maintaining consistent lifting speed and position across all screws, thereby reducing assembly accuracy requirements.
Solution Approach 2:
The control system automatically compensates for minor variations in lead screw performance and positioning through closed-loop control. The system self-adjusts to maintain synchronization without requiring extremely high initial assembly precision, as the control mechanism corrects deviations during operation.
3Force
If lead screw diameter is increased to improve lifting capacity, then bearing capacity increases, but processing difficulty and cost increase
Solution Approach 1:
The total lifting capacity requirement is segmented across multiple lead screws with smaller diameters. Instead of using one large-diameter lead screw that would be difficult and expensive to process, the load is distributed among several smaller lead screws that are easier to manufacture with standard processing capabilities.
Solution Approach 2:
Rather than relying on a single lead screw to provide 100% of the lifting capacity (which would require excessive diameter and processing), the system uses multiple lead screws each providing a partial portion of the total capacity, with the sum meeting or exceeding the required lifting capacity.
Data Source
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Figure 3
AI summary
Disclosed are a lifting device and an automatic guided transport vehicle. The lifting device includes a power component and a driving shaft (1) connected with the power component. The driving shaft (1) is connected with a first swing arm (2) and a second swing arm (3) that are arranged to be spaced apart from each other. The first swing arm (2) is hinged with the first linkage mechanism (4), the second swing arm (3) is hinged with the second linkage mechanism, and a lifting platform (40) is provided on the top of the first linkage mechanism (4) and the top of the second linkage mechanism. The lifting device is suitable for cargo lifting applications, such as at factories and during logistics transportation, and has a low cost and a large lifting bearing capacity.