Mobile Lifting Device Sleeve Carrier Nested Column Rigidity
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Solution Overview
Problem
Existing mobile lifting devices require additional components and increased wall thickness for rigidity, leading to higher production effort and material costs, and suffer from wear and tear issues during lifting movements.
Innovation Solution
A sleeve-shaped or cartridge-shaped carrier design that surrounds the lifting column, allowing for reduced component count, weight, and material usage, with separate guide elements and a quasi-closed lifting column profile for enhanced rigidity and protection of internal components, and a locking mechanism for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If open profiles are used for the carrier and lifting column, then the structure is simpler to manufacture, but greater wall thickness is required to achieve sufficient rigidity
Solution Approach 1:
The carrier is designed as a sleeve-shaped profile that surrounds the lifting column, creating a nested structure where the inner column is protected and supported by the outer carrier. This nesting arrangement provides mutual reinforcement, allowing both components to use thinner walls while maintaining overall rigidity.
Solution Approach 2:
The carrier and lifting column are merged into an integrated structural system where the carrier acts as both a structural element and a protective housing for the column. This merging eliminates the need for separate reinforcement components, achieving rigidity through the combined structure rather than through thick individual walls.
2Stability of the object's composition
If additional components are added to achieve rigidity in single-column lifting platforms, then structural stability is improved, but the number of components and production effort increase
Solution Approach 1:
The carrier serves multiple functions simultaneously: it provides structural rigidity, protects the lifting column, guides the lifting movement, and reduces wear. By merging these functions into a single component, the design achieves high structural stability without requiring additional separate components for each function.
Solution Approach 2:
The carrier is designed as a multi-functional element that combines structural support, protective housing, guidance mechanism, and wear reduction features. This universal design allows a single component to fulfill multiple roles that would traditionally require separate parts, thereby reducing overall device complexity while maintaining stability.
3Device complexity
If guide elements are arranged close together on the carrier, then the structure is more compact, but wear and tear increase during lifting movements
Solution Approach 1:
The guidance function is segmented between two separate elements: the upper guide element fixed to the carrier and the lower guide element fixed to the lifting column. This segmentation distributes the wear and guidance responsibilities, allowing each element to be optimized for its specific location and reducing overall wear through the distributed contact points.
4Quantity of substance
If the lifting column is designed with a narrower profile, then material usage and weight are reduced, but rigidity may be compromised
Solution Approach 1:
The narrower lifting column is nested within the sleeve-shaped carrier, creating a protected inner structure. The carrier acts as an external reinforcement that compensates for the reduced wall thickness of the column, allowing the column to use less material while maintaining rigidity through the combined nested structure.
Data Source
AI summary
The invention relates to a lifting device, especially a mobile lifting device, for lifting loads, vehicles or the like, said lifting device comprising a lifting column (14), a support (21) which is guided by the lifting column (14) and on which a load carrying means (22) can be arranged, and a drive unit (18) which can be controlled via a control unit (17) and which moves the support (21) up and down in relation to the lifting column (14). The support (21) has a sleeve-type or bullet-type shape and surrounds at least part of the lifting column (14).