Tubular Motor Unit With Replaceable Adapter Ring For Variable Tube Diameters
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Solution Overview
Problem
Tubular motor units for roll-up elements, such as blinds and curtains, face challenges in adapting to different winding tube diameters and shapes, as the limit stop unit often needs to be changed, and the existing wheels can be difficult to replace, especially from the side of the limit stop unit.
Innovation Solution
A tubular electric motor unit with a first transmission ring that can be rotated and opened for replacement, and a replaceable adapter ring in the radial space between the limit stop unit and the tubular body, allowing minimal radial clearance for coupling with different diameters and shapes, enabling the same limit stop unit to be used across various sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the limit stop unit is changed to adapt to different winding tube diameters, then the adaptability to different tube sizes is improved, but the device complexity and ease of operation deteriorate due to requiring removal of the entire limit stop unit
Solution Approach 1:
The limit stop unit is divided into separate components: the main limit stop unit and the limit stop wheel. This segmentation allows the wheel to be independently replaced without removing the entire limit stop unit, resolving the contradiction between adaptability and ease of operation.
Solution Approach 2:
A release device acts as an intermediary mechanism between the user and the limit stop wheel. This device simplifies the removal process by providing a dedicated interface for detaching the wheel, making replacement easier while maintaining the integrated structure of the limit stop unit.
2Manufacturing precision
If the limit stop unit is changed for each tube size, then the precision of fit is improved, but the device complexity and manufacturing cost worsen due to requiring multiple different units
Solution Approach 1:
The limit stop unit is designed as a universal component that can work with winding tubes of different diameters. The universality is achieved by keeping the main limit stop unit unchanged while allowing replacement of the limit stop wheel, which is the only part that needs to vary for different tube sizes. This reduces device complexity and manufacturing costs.
Solution Approach 2:
Instead of changing the entire limit stop unit for different tube diameters, only the parameter of the limit stop wheel (its diameter) is changed. This selective parameter change maintains precision of fit while avoiding the complexity of multiple complete units.
3Volume of moving object
If the limit stop wheel diameter is made close to the tubular body diameter, then the structural compactness is improved, but the adaptability to different tube sizes worsens as the wheel must be changed with each tube size
Solution Approach 1:
By segmenting the limit stop unit into a main body and a separate wheel, the system achieves compactness through the small wheel size while gaining adaptability through the replaceable wheel design. The segmentation allows the wheel to be optimized for compactness independently of the adaptability requirement.
Solution Approach 2:
The system transitions from a static, fixed-wheel design to a dynamic, replaceable-wheel design. This allows the wheel to be changed based on the tube diameter while maintaining the compact structure when the correct wheel is installed.
Data Source
AI summary
A tubular electric motor unit (10) for roll-up elements, such as blinds, curtains or similar items. It is the type intended to be housed inside a tube (11) for winding the roll-up element. The unit (10) has a tubular body (12) inside which is housed a geared motor (13) with its drive output at one end of the tubular body and a limit stop unit (14) at the other end. To transmit the rotation to the limit stop unit there is a first transmission ring (15) that is fitted so it can be rotated on a protruding portion of the limit stop unit to couple kinetically with the limit stop unit and that has an external peripheral surface intended to couple peripherally with minimal clearance with the inside surface of a tube for winding the roll-up element.