Scaffold Frame Element Spindle Groove Load Transfer
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Solution Overview
Problem
Existing frame elements for building scaffolds struggle to efficiently transfer vertical loads without increasing bulkiness and weight, leading to inadequate load-bearing capacity and stability.
Innovation Solution
The frame element incorporates a support head with a threaded spindle and spindle receiving portion featuring multiple axial and circumferential positioning grooves that reduce the inner diameter, enhancing the spindle's orientation and load distribution, thereby increasing the vertical load-bearing capacity while minimizing weight and moment occurrence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the frame pipe is made bulkier and heavier, then the vertical load bearing capacity is improved, but the weight of the frame element increases
Solution Approach 1:
The patent applies local quality by creating localized thickenings (annular ribs) at specific positions along the frame pipe where structural strength is most needed for load bearing, rather than uniformly increasing the diameter of the entire pipe. This allows the frame element to achieve higher vertical load capacity only where required, minimizing unnecessary material usage and weight increase in other regions of the pipe.
2Manufacturing precision
If the inner diameter of the frame pipe is reduced by positioning grooves, then the spindle orientation precision is improved, but the load bearing area is reduced
Solution Approach 1:
The patent resolves this contradiction by making the positioning grooves localized rather than continuous. The grooves are positioned only at specific locations where spindle orientation guidance is needed, while the majority of the frame pipe's inner surface remains intact to maintain load bearing area. This selective localization allows precise spindle positioning without significantly compromising the overall structural strength.
Solution Approach 2:
The positioning grooves are segmented into discrete sections rather than forming continuous rings. This segmentation reduces the total surface area removed from the frame pipe's inner diameter, thereby minimizing the reduction in load bearing area while still providing sufficient guidance for accurate spindle orientation at the groove locations.
Data Source
AI summary
The invention relates to a frame element (10) comprising a frame pipe (12) into which a threaded spindle (16) is partly introduced at one end. The threaded spindle (16) is guided in the frame pipe (12) by at least one spindle positioning groove (24, 26, 28), in particular multiple spindle positioning grooves (24, 26, 28). The frame pipe (12) is mechanically reinforced by the spindle positioning groove(s) (24, 26, 28) in the region of the threaded spindle (16) received in the frame pipe (12). At the same time, the maximum inclination of the threaded spindle (16) in the frame pipe (12) is reduced by the spindle positioning grooves (24, 26, 28). Overall, a force can thus be substantially more strongly applied to the frame element (10) in the direction of the longitudinal axis (23b) of the frame pipe (12). At the other end, the frame pipe (12) has at least one pin positioning groove (40, 42), in particular multiple pin positioning grooves (40, 42). Alternatively or in addition thereto, the frame pipe (12) can have at least one reinforcing groove in the region of a node point. Alternatively or in addition thereto, the frame pipe (12) can have at least one additional reinforcing groove between two node points.