Escapement Device Single Blocking Element Torque Elimination
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Solution Overview
Problem
Existing escapement devices with two active vibrations face challenges in manufacturing and assembly complexity, compactness, and operational safety due to small component sizes and the need for complex indexing and detent pins.
Innovation Solution
A tangential drive escapement device with a single blocking mobile element and two escapement mobile elements, where the blocking forces pass through the axis of rotation, eliminating the need for detent pins and allowing for a compact, symmetric design that transmits two impulses during a single oscillation of the inertial element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single blocking mobile element is used with two escapement mobile elements, then the device complexity and number of components are reduced, but the manufacturing precision and assembly difficulty increase due to the need for precise symmetric arrangement
Solution Approach 1:
The patent merges the function of two blocking mobile elements into a single blocking mobile element that alternately blocks two escapement mobile elements. This single element comprises first and second blocking surface portions that cooperate with the respective escapement mobile elements, reducing the total number of components while maintaining the blocking function throughout the oscillation cycle.
Solution Approach 2:
The blocking mobile element is designed with asymmetric blocking surface portions - the first blocking surface portion cooperates with the first escapement mobile element while the second blocking surface portion cooperates with the second escapement mobile element. The symmetric arrangement of these asymmetric portions about the pivot axis enables the single element to perform functions previously requiring two separate elements.
2Reliability
If the blocking forces pass through the axis of rotation, then operational safety and stability are improved by eliminating overturning torque, but the design complexity increases due to precise geometric constraints
Solution Approach 1:
The blocking surface portions are geometrically designed so that the blocking forces exerted by the escapement mobile elements pass through the pivot axis of the blocking mobile element. This creates an equipotential condition where no overturning torque is generated, as the force vectors are aligned with the rotation axis, eliminating the need for additional stabilizing mechanisms.
3Volume of moving object
If small component sizes are used to occupy comparable space, then the compactness is improved, but the ease of manufacture deteriorates due to complex manufacturing of small components
Solution Approach 1:
The escapement device is segmented into distinct functional modules: two escapement mobile elements with drive toothing, a single blocking mobile element with blocking surface portions, and an inertial element. This segmentation allows each component to be optimized for its specific function and manufactured using appropriate processes, then assembled into a compact configuration.
Data Source
AI summary
Escapement device, comprising:a first escapement mobile element,a second escapement mobile element,an inertial element, arranged to present oscillations comprising a first vibration and a second vibration,a blocking mobile element comprising:a first blocking surface portion,a second blocking surface portion,an impulse receiver, arranged to receive a first impulse during a first vibration, and to receive a second impulse during a second vibration,an impulse transmitter,characterized in that the first blocking surface portion is arranged so that a first force, exerted by the first escapement mobile element, passes in the vicinity of the fourth axis of rotation, and in that the second blocking surface portion is arranged so that a second force, exerted by the second escapement mobile element, passes in the vicinity of the fourth axis of rotation.