Self-Engaging Clutch via Friction-Driven Axial Displacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing clutch assemblies require user intervention or direct actuation to engage the output with the prime mover, lacking an automatic mechanism to transition from a disengaged to an engaged configuration upon torque application.
Innovation Solution
A self-engaging clutch assembly with an intermediate member that is axially displaceable between an input and output member, utilizing a friction ring and biasing member to automatically engage the clutch members upon rotation of the input member, allowing co-rotational operation without user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a traditional clutch assembly is used, then the structure is simple, but user intervention is required to engage the clutch
Solution Approach 1:
The clutch assembly automatically engages and disengages based on torque application to the input member, without requiring user intervention. The self-engaging mechanism uses the input torque itself to drive the axial displacement of the intermediate member, making the system self-actuating and eliminating the need for external actuation mechanisms.
Solution Approach 2:
The clutch transitions between disengaged and engaged states by changing the axial position of the intermediate member. This axial displacement is driven by the application of torque to the input member, which causes the first clutch member to rotate relative to the intermediate member, thereby changing the engagement parameter from spaced-apart to engaged.
2Extent of automation
If the clutch is always engaged, then power transmission is continuous, but the clutch cannot disengage when power is not needed
Solution Approach 1:
The clutch assembly automatically disengages when torque is not applied to the input member. The biasing member maintains the intermediate member in a spaced-apart position from the output member when no torque is present, ensuring automatic disengagement without requiring active control or energy input to maintain the disengaged state.
Solution Approach 2:
The biasing member pre-positions the intermediate member in a disengaged state, opposing any potential engagement until torque is applied. This preliminary positioning ensures that the clutch remains disengaged by default and only engages when the input torque overcomes the biasing force, preventing unwanted power transmission.
3Ease of operation
If manual actuation is used, then the mechanism is simple, but user input is required for engagement
Solution Approach 1:
The clutch assembly is self-actuating, using the input torque directly to drive the engagement process. The rotation of the input member relative to the intermediate member automatically causes the axial displacement needed for engagement, eliminating the need for separate actuation mechanisms or user input beyond applying torque to the input member.
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
Enables seamless engagement of the output with the prime mover when torque is applied, ensuring the clutch remains disengaged without power, facilitating automatic torque transmission without manual actuation.
Implementation Method 1
utilizing a friction ring and biasing member to automatically engage the clutch members upon rotation of the input member
Implementation Method 2
utilizing a friction ring and biasing member to automatically engage the clutch members
Data Source
AI summary
A clutch assembly for selectively rotationally coupling a prime mover to an output comprises an input member including an input clutch protrusion, an output member including an output clutch protrusion, and an intermediate member positioned between the input member and the output member. The intermediate member includes a first clutch member engaged with the input clutch protrusion and a second clutch member axially spaced from, but engagable with, the output clutch protrusion. The intermediate member is axially displaceable toward the output member to engage the second clutch member with the output clutch protrusion in response to rotation of the input member relative to the intermediate member.