Rolling Shutter Drive Bushing for Fast Fixed-Shaft Assembly
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Solution Overview
Problem
Existing rolling shutter drives require complex and time-consuming disassembly and reassembly processes during installation due to the need to handle multiple components, particularly when mounting on a fixed shaft.
Innovation Solution
A drive mechanism with a bushing formed of two parts that can be joined to tighten around a fixed shaft, featuring a connecting member allowing one part to move relative to the other, simplifying the process by reducing the number of handling steps and incorporating anti-friction cylindrical shells for easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bushing is formed of multiple separate parts that must be manually assembled around the shaft, then the drive can be securely attached to the shaft, but the installation process becomes time-consuming and complex due to repeated disassembly and reassembly
Solution Approach 1:
The bushing is divided into two separate parts (first part and second part) that can be independently positioned on the shaft. This segmentation allows the installer to work with smaller, more manageable components rather than attempting to assemble a complete circular bushing at once, thereby reducing installation time while maintaining secure attachment.
Solution Approach 2:
The connecting member incorporates a movable element that transitions between a first position (allowing the two bushing parts to be separated for installation) and a second position (locking the parts together to form a complete bushing). This dynamic mechanism enables the bushing to change from a separable state during installation to a fixed state during operation, resolving the contradiction between ease of installation and attachment security.
2Ease of operation
If the bushing parts are constrained to move relative to each other during assembly, then the installation process is simplified, but the structural complexity of the connecting mechanism increases
Solution Approach 1:
The connecting member is designed to automatically transition between its first and second positions based on the assembly process itself. As the two bushing parts are brought together, the connecting member self-actuates to lock them in place, eliminating the need for separate locking operations or complex control mechanisms. This self-service approach simplifies the overall assembly process while minimizing the complexity of the connecting mechanism.
Data Source
Figure 1~3
AI summary
A drive for rolling shutter (T) is described. The drive is mountable on a fixed shaft (S) which supports the shutter (T) and extends along a horizontal axis (X). The drive comprises a bushing (20) formed of at least two parts (22, 24) that are joinable to clamp within the bushing (20) the fixed shaft (S), a drum (60, 62) which is mounted around the bushing (20) coaxially and so as to rotate with respect to the bushing (20) about said horizontal axis (X), the drum comprising an outer surface (64) on which to wind up the shutter (T), and an electric motor to rotate the drum about the axis (X), To ease assembly, the two parts (22, 24) are constrained so that one can move with respect to the other while remaining connected thereto to open the bushing (20) by moving the two parts (22, 24) apart and thus allow the shaft (S) to be mounted inside the bushing.