Dual Clutch Device Axial Length Reduction Nesting
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Solution Overview
Problem
The dual clutch device in hybrid electric vehicles faces challenges with increased overall length due to the mounting of an electric motor and engine clutch, leading to deteriorated mountability and assembly properties, particularly due to the need for multiple fixing means to restrict axial movements.
Innovation Solution
A dual clutch device design that includes a motor with a stator and rotor in a cover, dual clutches connected to the transmission, an engine clutch connected to the rotor via a damper spline, and a damper positioned outside the engine clutch, optimizing the layout to reduce overall length and using a single fixing member to restrict axial movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electric motor and engine clutch are mounted on the dual clutch device, then the hybrid electric vehicle can achieve better power transmission efficiency, but the overall length of the dual clutch device increases
Solution Approach 1:
The patent positions the engine clutch on the inner diameter portion of the rotor, nesting it within the spatial envelope of the motor assembly. The damper is arranged radially outward from the engine clutch, creating a compact concentric layout where components are nested rather than linearly arranged, thereby reducing the overall axial length of the dual clutch device while maintaining all necessary functional elements
Solution Approach 2:
The patent transitions from a linear axial arrangement of components to a radial/concentric arrangement. By positioning the engine clutch on the inner diameter portion of the rotor and the damper radially outward, the design utilizes the radial dimension more effectively, reducing the axial length requirement while maintaining proper component spacing and functionality
2Stability of the object's composition
If multiple fixing means are used to restrict axial movements of the dual clutch and engine clutch, then the axial position stability is improved, but the number of components increases and assembly property deteriorates
Solution Approach 1:
The patent combines multiple fixing functions into a single integrated fixing member. This fixing member simultaneously restricts the axial movements of both the dual clutch and the engine clutch, eliminating the need for separate fixing components for each clutch assembly. The merged design maintains axial position stability while reducing the total component count and simplifying assembly procedures
Data Source
AI summary
An exemplary embodiment of the present invention provides a dual clutch device provided in a housing coupled, at one side, to a transmission and coupled, at the other side thereof, to an engine, the dual clutch device including a motor including a stator and a rotor received in a cover, dual clutches provided close to the transmission based on the motor and connected to the rotor, an engine clutch provided close to the engine based on the motor and connected to the rotor, and a damper provided in the housing and connected to the engine clutch through a damper spline.