Hybrid Driving Module Assembly With Nested Damper and Lock-Up Clutch
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Solution Overview
Problem
Existing hybrid driving modules are not compact enough in the axial direction, which complicates their design and assembly, especially in vehicles with limited engine room space, and increases costs due to inefficient use of space occupied by dampers and lock-up pistons.
Innovation Solution
A hybrid driving module design where the lock-up clutch and damper are positioned to overlap the rotor hub in the axial direction, with the damper and lock-up piston being spline-coupled to restrict rotation and simplify assembly, allowing for a more compact axial dimension and easier manufacturing and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dampers are provided in series between the lock-up clutch and the output member in the axial direction, then vibration absorption is improved, but the axial volume of the hybrid driving module increases
Solution Approach 1:
The patent repositions the damper from an axial arrangement to a radial arrangement, allowing the damper to be disposed radially inside the axial extension portion of the rotor hub. This dimensional change enables the damper to overlap with the rotor hub in the axial direction rather than extending axially, thereby maintaining vibration absorption functionality while significantly reducing the axial volume of the hybrid driving module.
2Reliability
If the damper is disposed between the lock-up piston and the torque converter, then vibration absorption is achieved, but the design of a compact hybrid driving module becomes difficult
Solution Approach 1:
The patent implements a nested arrangement where the damper is disposed radially inside the axial extension portion of the rotor hub. The lock-up piston is positioned to radially overlap the damper, and both components are contained within the rotor hub's axial extension portion. This nested configuration allows multiple components to occupy overlapping radial spaces, achieving compact design while maintaining vibration absorption functionality.
3Ease of manufacture
If the lock-up piston and damper are fixed by riveting, then assembly is achieved, but the assembling process becomes complicated
Solution Approach 1:
The patent integrates the lock-up piston and damper into a unified assembly structure where both components are disposed within the rotor hub's axial extension portion and connected through spline couplings. This merged configuration allows the components to be assembled together as a single unit, eliminating the need for separate riveting operations and simplifying the overall assembling process while maintaining structural integrity.
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 design achieves a more compact axial dimension, reduces manufacturing and assembly complexity, and lowers costs by optimizing the space occupied by the damper and lock-up piston, enhancing the mountability and efficiency of the hybrid driving module.
Implementation Method 1
two torsional dampers (hereinafter, also simply referred to as 'dampers') configured to absorb vibration of power
Implementation Method 2
the lock-up piston and the damper are spline-coupled to each other, thereby restricting rotation between the lock-up piston and the damper
Data Source
AI summary
The present invention relates to a hybrid driving module having a structure that is compact in an axial direction and easily manufactured and assembled, and the hybrid driving module includes a rotor hub configured to support a rotor, connected to an engine, and configured to receive power of the engine, a first power transmission route configured to connect the rotor hub and an output member, and a second power transmission route provided in parallel with the first power transmission route and configured to connect the rotor hub and the output member, in which the rotor hub has a radial extension portion, and an axial extension portion connected to an outer periphery of the radial extension portion, in which a lock-up clutch and a damper, which control connection and disconnection between the rotor hub and the output member, are provided in the second power transmission route, and in which at least a part of the lock-up clutch and at least a part of the damper are disposed radially inside the axial extension portion.