Roller Shutter Drive With Two-Stage Universal Joint Assembly
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Solution Overview
Problem
Current roller shutter driving devices face assembly difficulties due to misalignment between the output shaft and the shaft, and generate noise during operation due to the use of gear transmission mechanisms.
Innovation Solution
A roller shutter driving apparatus with a two-stage universal joint and non-coaxial parallel shafts, utilizing non-circular cross-sections and a two-stage universal joint to facilitate power transmission without gears, reducing assembly complexity and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a gear transmission mechanism is used for power transmission between the driver and the shaft, then the power transmission is achieved, but the assembly difficulty is high and noise is generated during operation
Solution Approach 1:
The patent replaces the gear transmission mechanism with a direct shaft connection system. The output shaft of the rotating power member is made coaxial with the shaft, eliminating the need for intermediate gear transmission. This substitution of mechanical systems reduces assembly complexity and eliminates gear noise while maintaining power transmission functionality.
Solution Approach 2:
The patent extracts and removes the gear transmission mechanism from the power transmission system. By making the output shaft coaxial with the shaft, the intermediate transmission components (gears) are eliminated entirely, simplifying the device structure and reducing assembly difficulty while preserving the essential power transmission function.
2Ease of manufacture
If the output shaft is offset on one side of the driving housing and not coaxial with the shaft, then the assembly is simplified, but the assembly difficulty increases due to misalignment
Solution Approach 1:
Instead of offsetting the output shaft to simplify manufacturing and then dealing with misalignment issues, the patent inverts the approach by making the output shaft coaxial with the shaft from the beginning. This inversion of the conventional offset design eliminates misalignment problems while maintaining manufacturing simplicity.
Solution Approach 2:
The patent employs asymmetric design in the driving housing structure, where the output shaft is positioned coaxially with the shaft rather than offset. This asymmetric positioning eliminates the misalignment issues that would arise from offset arrangements, while the overall housing structure maintains manufacturing simplicity through its designed configuration.
Data Source
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AI summary
Provided by embodiments of the present application is a roller shutter driving apparatus, comprising: a shaft rod, which is fixed to a support frame on the outer side of one end of a winding barrel of a roller shutter, is inserted into the winding barrel, and is coaxially arranged with the winding barrel; and a driver, which is arranged in the winding barrel and is used to drive the winding barrel to rotate about the shaft rod. The driver comprises a base that is fixed relative to the winding barrel in the circumferential direction and a rotation driving component that is fixedly arranged on the base. The central axes of an output shaft of the rotation driving component and the shaft rod are parallel to one another and have a preset non-zero distance. The roller shutter driving apparatus also comprises a two-section universal coupling arranged between the output shaft and the shaft rod, and the two-section universal coupling comprises a transmission shaft and two universal joint modules that are arranged at two opposite ends of the transmission shaft, respectively. Outer connecting ends of the two universal joint modules are fixedly connected to the output shaft of the rotation driving component and the shaft rod in one-to-one correspondence. In the present embodiments, the difficulty of assembly can be effectively reduced, and working noise is prevented.