Rotating Body Structure for Rotation Restriction Under Stress
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing rotation restricting mechanisms are limited in their ability to operate effectively when the rotation restricting member is rotating, and they tend to concentrate stress at the boundary between the disk part and the protrusion, leading to potential plastic deformation.
Innovation Solution
A rotating body for a rotation restricting mechanism is designed with a configuration that includes radial-support parts, first-circumferential-connecting parts, second-circumferential-connecting parts, and engaging protrusions, which allows for increased stiffness and elastic deformation, reducing stress concentration and enabling operation even when the rotation restricting member is rotating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotation restricting member engages with the fixed restricting member during rotation, then the rotation restricting mechanism can operate during rotation, but stress concentrates at the boundary between the disk part and the protrusion causing potential plastic deformation
Solution Approach 1:
The rotation restricting member is segmented into a disk part and a protrusion part, allowing the stress to be distributed across different structural zones. The protrusion is designed as a separate engaging element that can be optimized independently from the disk part, reducing stress concentration at the boundary.
Solution Approach 2:
The boundary region between the disk part and protrusion is given special structural characteristics with increased thickness or reinforcement. This local quality enhancement provides extra strength precisely where stress concentration occurs during rotational engagement, preventing plastic deformation while maintaining overall design efficiency.
2Adaptability or versatility
If the protrusions have lower stiffness to allow engagement during rotation, then the mechanism can operate during rotation, but the rotation restricting member is more susceptible to stress and deformation
Solution Approach 1:
The protrusion is designed with dynamic characteristics that allow it to flex and absorb stress during engagement. The stiffness is optimized to provide enough flexibility for smooth engagement during rotation while maintaining sufficient rigidity to transmit the restricting force effectively, creating a dynamic balance between adaptability and stress tolerance.
Solution Approach 2:
The rotation restricting member utilizes composite structural design where the disk part and protrusion may have different material properties or structural compositions. This allows the protrusion to have tailored stiffness characteristics - softer for engagement compatibility during rotation, while the overall structure maintains high stress tolerance through the composite architecture.
Data Source
AI summary
A rotating body for a rotation restricting mechanism rotates integrally with a motor, and the rotation of the rotating body is restrictable by engagement with an engaging pin. The rotating body includes a plurality of radial-support parts that extend in a radial direction, with the inner end portions thereof connected to the motor, a plurality of first-circumferential-connecting parts each connecting the inner end portions of two mutually-adjacent radial-support parts, a plurality of second-circumferential-connecting parts each connecting the outer end portions of two mutually-adjacent radial-support parts, and a plurality of engaging protrusions provided in the outer end portions of the radial-support parts. Two mutually-adjacent engaging protrusions in the circumferential direction have an interval therebetween that allows movement of the engaging pin in the circumferential direction between the two mutually-adjacent engaging protrusions.