Integrated Piston Arm and Transfer Plate for Dry Clutch Release
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Solution Overview
Problem
Conventional hybrid drive force transmission devices with dry clutches experience delays in clutch release response and drag between clutch plates due to the biasing force of return springs and elastic seal members, leading to inefficient energy transfer and increased fuel consumption.
Innovation Solution
A driving force transmission device with a dry clutch, piston, piston arm, return spring, and elastic seal member, where the arm fixing plate is integrated with the elastic seal member to provide a biasing force to both the piston arm and arm fixing plate, ensuring quick clutch release and maintaining the gap between clutch plates during vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the return spring biases only the piston arm in the conventional structure, then the structure is simple, but the clutch release response is delayed because the piston arm may retreat prior to the transfer plate
Solution Approach 1:
The invention merges the piston arm and transfer plate into a single integrated component. This ensures that when the return spring applies biasing force, both the piston arm and transfer plate move together, preventing the piston arm from retreating prior to the transfer plate and eliminating the delay in clutch release response.
Solution Approach 2:
The return spring is pre-loaded to provide initial biasing force that acts on both the piston arm and transfer plate simultaneously. This preliminary action ensures that during clutch release transition, the integrated component moves together without sequential delay, improving release response speed.
2Reliability
If the transfer plate is only elastically supported by the elastic seal member in the open state, then the structure is simple, but vibration input causes the transfer plate to contact the clutch plate reducing the gap and causing drag
Solution Approach 1:
By integrating the transfer plate with the piston arm, the invention creates a single rigid component that is more stable under vibration than a separately supported transfer plate. The integrated structure prevents excessive movement and contact with the clutch plate during vibration, eliminating drag while maintaining structural simplicity.
Solution Approach 2:
The elastic seal member provides pre-configured elastic support and cushioning for the integrated piston arm and transfer plate assembly. This beforehand cushioning absorbs vibration inputs and prevents the assembly from contacting the clutch plate, maintaining the gap and preventing drag during the open state.
3Speed
If the piston arm is urged backward by the return spring during clutch release transition, then the return spring provides biasing force, but the clutch release is delayed until the transfer plate leaves the clutch plate
Solution Approach 1:
The integration of the piston arm and transfer plate into one component eliminates the time delay caused by sequential movement. When the return spring urges the component backward, both the piston arm and transfer plate move simultaneously, preventing the delay that occurred when the piston arm retreated before the transfer plate left the clutch plate.
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
This configuration improves clutch release response and prevents drag between clutch plates, enhancing energy transfer efficiency and reducing fuel consumption by ensuring a consistent and responsive clutch engagement and disengagement process.
Implementation Method 1
the return spring imparts to the piston arm a biasing force in the clutch release direction
Implementation Method 2
the return spring is interposed between the piston arm and the side wall of the clutch drum, and imparts to the piston arm a biasing force
Implementation Method 3
The elastic seal member is sealing the through hole and the arm distal end from the clutch chamber fixed to the side wall of the clutch drum for elastic deformation in response to the stroke motion of the arm distal end
Data Source
AI summary
A hybrid driving force transmission device is provided with a multiple-plate dry clutch, a piston, a piston arm, a return spring, bellows elastic seal components and an arm fixing plate. The return spring applies biasing force to the piston arm in the release direction of the clutch, during the release period of the multiple-plate dry clutch. The bellows elastic seal member is secured or maintained in a position on the side wall of a clutch drum and seals a through hole and arm distal end from the clutch chamber, and undergoes an elastic deformation following the stroke movement of the arm distal end. The arm fixing plate is integrally provided with the bellows elastic seal member, is fixed to the arm distal end, and when the multiple-plate dry clutch is engaged, is configured to contact the clutch plate for transferring the clutch engagement force.