Hybrid Transmission Clutch Motor Coupling Damping Structure
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Solution Overview
Problem
Hybrid vehicle transmissions experience rattling noise due to vibrations causing collisions between the engine clutch retainer and motor rotor, resulting from a spline serration gap, which is not effectively addressed by existing designs.
Innovation Solution
An engine clutch motor coupling structure with damping units, including washers made of elastic materials and snap rings, is implemented to absorb rotational direction vibrations between the retainer and rotor, minimizing noise by providing axial compression support and rotational restraint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine clutch retainer is coupled with the rotor of the motor using a spline connection, then power transmission from the motor to the transmission is enabled, but a spline serration gap is created that causes rattling noise due to engine vibrations
Solution Approach 1:
A damping unit is introduced as an intermediary component between the retainer and the rotor. This damping unit fills the spline serration gap and absorbs vibrations, preventing the retainer from colliding with the rotor and eliminating rattling noise while maintaining the power transmission function
Solution Approach 2:
The physical state of the connection between retainer and rotor is changed by introducing a viscoelastic material that can dynamically adjust its properties. The damping unit changes from a rigid gap to a compliant connection that absorbs vibrational energy, transforming the harmful vibration parameter into a controlled damping effect
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 damping units effectively absorb engine-induced vibrations, eliminating rattling noise between the retainer and rotor, enhancing the quiet operation of hybrid transmissions.
Implementation Method 1
a washer coupled with a mounting hole formed in the rim of the retainer in the axial direction of the rotor, and a coupling pin fitted in the washer and axially coupled with the end of the rotor. In an example embodiment, the washer is composed of rubber
Implementation Method 2
at least one damping unit installed in the axial direction of the rotor in a rim of the retainer between an end of the rotor and the rim of the retainer, and connected with the end of the rotor
Data Source
AI summary
An engine clutch motor coupling structure for a hybrid transmission is disclosed. The motor coupling structure couples a retainer of the engine clutch with a rotor of a motor in the hybrid transmission, and includes at least one damping unit installed in the axial direction of the rotor in a rim of the retainer between an end of the rotor and the rim of the retainer, and connected with the end of the rotor.