Adjustable Roller Shutter Winding Shaft Extension Piston
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roller shutter devices with rigid winding shafts require high manufacturing accuracy and face assembly difficulties due to fixed bearing spacing, and extension pistons with spring-based mechanisms are prone to disengagement under axial forces, leading to potential misalignment and instability.
Innovation Solution
A roller shutter design featuring a winding shaft with receiving elements and an extendable extension piston accommodated in a bush, supported by a push-out spring, allowing for axial fixation in multiple positions and simplified assembly through a preassembled sleeve and spring subassembly, along with a locking mechanism using a U-shaped rider and peripheral notches for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid winding shaft with fixed bearing spacing is used, then manufacturing accuracy is improved, but assembly difficulty increases
Solution Approach 1:
The winding shaft is divided into a shaft body and an extension piston that can be independently adjusted. The extension piston can be fixed at different axial positions using locking members, allowing the bearing spacing to be segmented and adjusted rather than requiring the entire shaft to be precisely manufactured in one piece.
2Ease of manufacture
If an extension piston with push-out spring is used, then assembly simplicity is improved, but reliability deteriorates under axial forces
Solution Approach 1:
The extension piston is preliminarily positioned by the push-out spring to enable easy assembly, but before final operation, locking members are engaged to fix the piston axially. This preliminary positioning followed by secure locking ensures both assembly simplicity and operational reliability under axial forces.
Solution Approach 2:
The extension piston transitions from a static fixed-position design to a dynamic adjustable design where it can be positioned at multiple axial locations and locked in place. This allows the system to adapt to different bearing spacing requirements while maintaining reliability through the locking mechanism.
3Adaptability or versatility
If the extension piston is made adjustable, then adaptability is improved, but device complexity increases
Solution Approach 1:
The adjustment mechanism is segmented into simple components: the extension piston, locking members, and notches. Each component has a single function, and together they provide multi-position adjustability without requiring a complex mechanism. The notches on the piston provide discrete positioning points that simplify the control of extension.
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
This solution enables simple and cost-effective assembly, prevents undesirable shortening of the winding shaft, and ensures reliable fixation, enhancing the stability and versatility of the roller shutter by allowing adjustable axial play and secure locking of the extension piston.
Implementation Method 1
on which a push-out spring assigned to the extension piston is supported
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
At its ends, a winding shaft (1) has retaining units (5) on support units for side support devices. Near one end there is an extractable lengthening piston to support an assigned retaining unit. The piston can be fixed in an axial fixed position.