Precise Clock Transmission Joint for Silent Motion
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Summary
Problems
Existing clockwork mechanisms face challenges in adjusting the layout of display elements after assembly, requiring complete repositioning of modules and compromising assembly precision due to numerous intermediate blanks, and existing transmission joints are not feasible for certain applications or result in operating noise.
Innovation solutions
A transmission joint with a constant velocity type mechanism that connects parallel shafts using an Oldham joint-like design with elastic return systems and friction elements to ensure precise, homokinetic motion transmission, suitable for compact watch movements.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If modular clock movements with interchangeable modules are used to adjust display layouts, then adaptability is improved, but manufacturing precision deteriorates due to the large number of intermediate blanks required for module production
Why choose this principle:
The transmission joint is divided into separate modular components (first component with first shaft portion, second component with second shaft portion) that can be independently manufactured and then precisely assembled together, allowing display modules to be repositioned without compromising overall assembly precision
Principle concept:
If modular clock movements with interchangeable modules are used to adjust display layouts, then adaptability is improved, but manufacturing precision deteriorates due to the large number of intermediate blanks required for module production
Why choose this principle:
The transmission joint acts as an intermediary mechanism between the display module and the main movement, enabling precise angular position adjustment of display elements through its adjustable shaft configuration while maintaining accurate motion transmission
Application Domain
Data Source
AI summary:
A transmission joint with a constant velocity type mechanism that connects parallel shafts using an Oldham joint-like design with elastic return systems and friction elements to ensure precise, homokinetic motion transmission, suitable for compact watch movements.
Abstract
Transmission joint (100), in particular a watchmaking transmission joint, for the mechanical connection of at least one first part (2A) of a first shaft, at least one shaft rotatable about a first axis (A2), to at least one second part (3A) of a second shaft, at least one shaft rotatable about a second axis (A3), the first and second axes being parallel or substantially parallel, the transmission joint comprising: – at least one first part (2A) of the first shaft (21), – at least one second part (3A) of the second shaft (31), and – at least one first elastic return system (210: 221, 222, 223, 224) arranged so as to limit or eliminate the play between at least one first part (2A) of the first shaft and at least one second part (3A) of the second shaft, the at least one return system mechanically connecting at least one first part (2A) of the first shaft and at least one second part (3A) of second tree.