Rotary Positioning Mechanism for Large-Angle Directional Stops
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Solution Overview
Problem
Existing rotary devices face challenges in achieving reliable large-angle rotation control, particularly when the rotation angle exceeds 180 degrees, due to structural limitations and mechanism interference, making it difficult to implement effective angle control.
Innovation Solution
A rotary device with a limiting mechanism that includes a rotatable member and a limiting member, where the limiting member selectively stops the positioning member based on the rotation direction, allowing for one-way or two-way positioning of greater than 180 degrees through the use of positioning mechanisms and switching units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rotary device uses a conventional stopping mechanism to achieve angle control when forward and reverse rotation angle is greater than 180 degrees, then the angle control can be implemented, but the mechanism becomes more complex and mechanism interference is caused
Solution Approach 1:
The stopping mechanism is segmented into two independent parts: a first stopping member with a first stopping portion for one-directional stopping, and a second stopping member with a second stopping portion for reverse-direction stopping. This segmentation allows each stopping member to be simple and independent, avoiding complex interference while achieving comprehensive angle control in both directions.
2Measurement precision
If a rotary device uses a conventional stopping mechanism for large-angle rotation control, then angle control can be achieved, but mechanism interference is caused
Solution Approach 1:
By dividing the stopping function into two separate stopping members that operate independently in different rotation directions, the mechanism avoids interference between components. Each stopping member only activates when needed, eliminating harmful interactions while maintaining precise angle control.
3Device complexity
If a rotary device is designed with limited rotation control, then the structure can be simple, but the rotation angle is limited to less than 180 degrees
Solution Approach 1:
The stopping members are designed with asymmetric stopping portions positioned at different angular locations. The first stopping portion is configured for one rotation direction while the second stopping portion is configured for the opposite direction. This asymmetric design enables the simple structure to accommodate large-angle rotation control in both directions without requiring complex bidirectional stopping mechanisms.
Data Source
AI summary
A rotary device includes a rotatable member and a limiting member. The rotatable member includes a positioning mechanism, the positioning mechanism includes a stopping member and a positioning member. When the rotatable member rotates along a first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move away from the stopping portion and rotate relative to the stopping member, so that the positioning member to passes through the limiting member. When the rotatable member rotates along a second rotation direction opposite to the first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move close to the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion, to position the rotatable member.