Lifting device
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Solution Overview
Problem
Conventional lifting devices with gas springs have a fixed maximum load carrying capacity, which limits their adaptability to objects of varying weights, requiring multiple devices for different loads and reducing operational stability when exceeding the capacity, and are not economical for users.
Innovation Solution
A lifting device with an adjusting apparatus that rotates the gas spring to change its included angle, allowing the user to adjust the maximum load carrying capacity of the working table by altering the effective force applied, thereby accommodating objects of different weights without the need for multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a gas spring is used as the supporting mechanism to determine the maximum load carrying capacity, then the lifting device can support heavy objects with stable operation, but the load carrying capacity cannot be adjusted and multiple devices are needed for different weights
Solution Approach 1:
The gas spring is designed with rotatable connections at both ends, allowing the central axis to be rotated relative to the lifting direction. This dynamic adjustment changes the included angle between the gas spring axis and lifting direction, thereby dynamically adjusting the load carrying capacity from a fixed value to a variable range, resolving the contradiction between adaptability and fixed structure
Solution Approach 2:
The load carrying capacity is adjusted by changing the included angle parameter of the gas spring. When the included angle increases, the effective component force in the lifting direction decreases, reducing the load carrying capacity. This parameter change approach allows continuous adjustment without changing the gas spring itself, solving the adaptability issue while maintaining structural simplicity
2Adaptability or versatility
If the gas spring is rotated to change the included angle, then the maximum load carrying capacity can be adjusted, but the structural complexity increases
Solution Approach 1:
The adjusting apparatus integrates multiple functions: it provides rotation support for the gas spring, enables angle adjustment, and maintains structural stability. By making the connection points rotatable rather than fixed, a single structural modification achieves both adjustment capability and operational stability without requiring complex separate mechanisms
Solution Approach 2:
The connection structure is segmented into rotatable connection points at both ends of the gas spring, allowing independent rotation at each end. This segmentation enables flexible angle adjustment while keeping each connection point relatively simple in structure, avoiding the need for a complex centralized adjustment mechanism
3Adaptability or versatility
If multiple lifting devices are purchased for different load carrying capacities, then objects of different weights can be accommodated, but the cost increases
Solution Approach 1:
A single lifting device is designed to perform multiple load carrying functions by adjusting the gas spring angle. The same device can accommodate light objects by increasing the included angle (reducing effective force) and heavy objects by decreasing the included angle (increasing effective force), eliminating the need for multiple specialized devices and reducing quantity required
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables flexible adjustment of the maximum load carrying capacity based on the weight of the object, maintaining operational stability and reducing the need for multiple lifting devices, thus enhancing user convenience and cost-effectiveness.
Implementation Method 1
a gas spring is often used as the supporting mechanism inside the lifting device, the maximum load carrying capacity of the working table of the lifting device to carry an object is determined by the extension force of the gas spring installed
Implementation Method 2
The central axis has a first component force in the lifting direction when the central axis is parallel to the lifting direction, and the central axis has a second component force in the lifting direction when the central axis has an included angle with respect to the lifting direction. The first component force is greater than the second component force
Data Source
AI summary
A lifting device including a first platform, a second platform, a gas spring and a locking device is provided. The first platform includes a base and a first column connected to each other. The second platform includes a working table and a second column connected to each other. The second column and the first column are movably connected. The second column has a plurality of engaging holes. The gas spring includes a first end and a second end opposite to each other. The first end connected to the first column, and the second end connected to the second column. The locking device partially disposed at the first column, and a portion of the locking device being adapted to penetrate the engaging holes to fix a relative position between the second column and the first column.