Cam-Actuated Clutch Assembly for Selectable Torque Direction
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Solution Overview
Problem
Existing clutch systems lack efficient mechanisms for dynamically controlling the engagement and disengagement of power components, particularly in applications requiring precise torque transmission and directionality.
Innovation Solution
An actuation mechanism with a cam member and cam followers is introduced to control the engagement and disengagement of coupling members, utilizing a first and second cam surface interaction to move between positions, enabling precise control of torque transmission and directionality through a linear actuator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a linear actuator with stator coils and permanent magnets is used to control clutch engagement, then the clutch can be dynamically controlled between engaged and disengaged states, but the device complexity increases due to multiple electromagnetic components
Solution Approach 1:
The patent replaces traditional mechanical actuation mechanisms (such as linkages, levers, or manual operators) with an electromagnetic linear actuator system. The stator coils generate magnetic fields that interact with permanent magnets to produce linear motion, enabling dynamic control of clutch engagement without complex mechanical transmission components. This substitution simplifies the overall mechanical structure while achieving precise dynamic control.
Solution Approach 2:
The linear actuator serves multiple functions: it controls the engagement and disengagement of locking elements, positions the translator between different states, and enables dynamic selectable clutch operation modes. By consolidating these control functions into a single electromagnetic actuator assembly, the patent reduces the number of separate control mechanisms needed, thereby managing device complexity while enhancing automation capability.
2Adaptability or versatility
If multiple locking elements and a selector plate are added to create a selectable OWC, then the clutch can operate in multiple modes with torque transmission in one or both directions, but the device complexity increases
Solution Approach 1:
The clutch is divided into multiple functional segments: a first set of locking elements for one-directional engagement, a second set of locking elements for opposite-direction engagement, and a selector plate that independently controls each set. This segmentation allows each subset of locking elements to be controlled separately, enabling versatile operating modes (torque transmission in one direction, both directions, or overrun in either direction) while maintaining a modular structure that manages complexity through functional decomposition.
3Measurement precision
If plungers are threaded and secured with internally threaded nuts to operate locking elements, then the actuator can precisely control locking element position, but the manufacturing precision requirements increase
Solution Approach 1:
The plungers are designed with self-contained threaded features and internally threaded nuts that integrate the positioning and securing functions into the plunger assembly itself. The threaded plunger shafts engage with corresponding threaded holes in the translator, and the internally threaded nuts lock the plungers in place without requiring external fastening operations. This self-service design achieves precise positioning while reducing the need for high-precision external machining operations and complex assembly procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The actuation mechanism provides efficient and precise control over the engagement and disengagement of power components, allowing for multiple modes of torque transmission based on rotational direction, enhancing the functionality of clutch systems.
Implementation Method 1
The stator coils 44, 46 are wound in series with reversed polarity relative to one another, anti-series. The translator 20 linearly moves between lateral, axial positions.
Implementation Method 2
The translator 20 includes an annular ring of segmented permanent magnets 21. Depending on actuation direction, the plungers 30 within the translator 20 directly contact the locking elements 26 and cause them to pitch up or down.
Data Source
AI summary
A clutch assembly, such as a controllable clutch, having an actuator for controlling coupling members for engagement and disengagement of components. The actuator includes a cam member with a first cam surface and a second cam surface. The first cam surface is spaced from the second cam surface. A first cam follower follows the first cam surface and a second cam follower follows the second cam surface. A first link extends between the first cam follower and a first coupling member, and a second link extends between the second cam follower and a second coupling member.