Asymmetric X-Linked Lift Layout to Prevent Frame Drop
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Solution Overview
Problem
Conventional X-linked lift mechanisms occupy a wide space due to lift drive components, making it difficult to integrate additional functional components, and there is a risk of the lift frame dropping if the lineal actuator fails.
Innovation Solution
The X-linked lift mechanism design relocates all lift drive components to the other lateral side of the first and second links, allowing for a space-free area on one side for additional components and preventing drop by using a linear actuator that elongates to raise the lift frame, reducing the load on the actuator and preventing buckling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lineal actuator and boost arms are disposed between both lateral sides of the links to raise the lift frame, then the lift frame can be raised when the actuator shortens, but the drive components occupy a wide area making it difficult to add other functional components
Solution Approach 1:
The patent relocates the drive components from a centralized position between both lateral sides to an asymmetric arrangement where the actuator and boost arms are positioned primarily on one lateral side. This dimensional redistribution of components creates free space on the opposite lateral side for additional functional components while maintaining the lift frame raising function through the asymmetric linkage mechanism.
2Ease of operation
If the lineal actuator is provided to extend between both lateral sides of the links, then the lift frame can be raised, but the actuator and drive components occupy wide space particularly when the lift frame is fully lowered
Solution Approach 1:
The patent employs asymmetric arrangement of the drive components, positioning the lineal actuator and boost arms primarily on one lateral side of the X-linked mechanism rather than symmetrically between both lateral sides. This asymmetric configuration reduces the overall space occupied by drive components, particularly when the lift frame is in the fully lowered position, while maintaining effective lift frame raising capability.
3Device complexity
If the lift frame is raised when the lineal actuator acts in the direction to shorten itself, then the mechanism is simple, but there is a dangerous possibility that the lift frame may drop if the actuator breaks
Solution Approach 1:
The patent inverts the conventional actuator action direction: instead of the lineal actuator shortening to raise the lift frame, the actuator elongates to raise the lift frame. This inversion changes the failure mode from potential dropping (when actuator breaks during shortening) to buckling (when actuator breaks during elongation), thereby improving safety while maintaining mechanism simplicity.
4Adaptability or versatility
If the lift frame is kept at a low position when fully lowered and at a high position at maximum stroke, then the functional range is optimized, but the drive components must be enlarged which intensifies the space occupation problem
Solution Approach 1:
The patent uses asymmetric arrangement of the drive components on one lateral side to accommodate the enlarged actuator and boost arms needed for achieving low fully-lowered position and high maximum stroke. This asymmetric configuration allows the drive components to be positioned efficiently, creating free space on the opposite lateral side for additional functional components while maintaining the optimized functional range.
Data Source
AI summary
An X-linked lift mechanism having first links (3) and second links (4) constituting an X-linked mechanism between a base frame (1) and a lift frame (2). A drive member (11) is pivotally rotatably installed between the other lateral side portions of the second links and is connected with boost arms (12) and a drive arm (13). Guide members (15) are provided for guiding the moving members (14) installed at the ends of the boost arms. The guide members are installed on the other lateral side portions of the first links in the length direction. Also, a linear actuator is provided so as to extend between the other lateral side of the first links and the drive arm.