Adjustable Rotary Shaft Assembly for Rolling Gate Weight Balancing
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Solution Overview
Problem
Conventional rotary shaft arrangements for roller doors require precise assembly to achieve preset weight compensation characteristics, which often do not match the installation site conditions, leading to ineffective weight balancing.
Innovation Solution
An adjustable rotary shaft arrangement with a driver and bearing device that form a weight compensation device with adjustable compensation characteristics, allowing for form-fitting connections and positional adjustments to match the installation site conditions, utilizing a driver with projections and a bearing device with corresponding grooves, and optionally a second weight compensation device for fine adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a winding drum with predetermined gradient or spring unit with predetermined spring characteristic is used for weight balancing, then the preset compensation characteristics are achieved during assembly, but the compensation characteristics cannot be achieved after installation when site conditions differ from assumptions
Solution Approach 1:
The patent applies the dynamics principle by making the compensation characteristic adjustable after installation. The winding drum's gradient can be modified by changing the winding path or position, allowing the system to adapt to actual installation conditions rather than being fixed during manufacturing. This resolves the contradiction by enabling both preset characteristics and post-installation adaptation.
Solution Approach 2:
The patent implements parameter changes by allowing modification of the winding drum's geometric parameters (gradient, radius, winding position) after installation. The compensation characteristic is no longer fixed but can be adjusted by changing physical parameters of the winding mechanism to match actual site conditions, thereby resolving the contradiction between manufacturing precision and adaptability.
2Manufacturing precision
If precise assembly is required to achieve preset compensation characteristics, then the compensation characteristics are achieved during assembly, but the assembly process becomes complex and time-consuming
Solution Approach 1:
By making the compensation characteristic dynamically adjustable through simple post-assembly modifications (changing winding position or gradient), the patent eliminates the need for extremely precise initial assembly. The system can achieve correct compensation through adjustment rather than precision manufacturing, greatly simplifying the assembly process.
Solution Approach 2:
The patent enables self-service adjustment of compensation characteristics after installation. The system includes features that allow users to adjust the winding parameters themselves without requiring specialized tools or expertise, making the adjustment process simple and intuitive, thereby resolving the contradiction between precision and ease of manufacture.
3Device complexity
If conventional weight-balancing devices with predetermined characteristics are used, then the device structure is simple, but the device cannot be easily adapted to different installation situations
Solution Approach 1:
The patent maintains simple device structure while adding dynamic adjustability through the adjustable winding drum mechanism. The basic structure remains conventional and simple, but the winding drum can be repositioned or reconfigured to change compensation characteristics, providing adaptability without significantly increasing structural complexity.
Solution Approach 2:
The patent enhances universality by designing the winding drum system to perform multiple functions: it can be adjusted to provide different compensation characteristics for different installation situations. This single adjustable component replaces the need for multiple fixed-characteristic components, maintaining simplicity while achieving versatility across different applications.
Data Source
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AI summary
The rotary shaft arrangement (10) has a rotary shaft (12) that is rotatable around the rotating axis (D). A carrier and a bearing unit form an adjustable counterweight unit with adjustable balance characteristics for balancing the weight of a door panel (110). An independent claim is also included for a method for manufacturing a rotary shaft arrangement.