Driving Force Distribution Device Radial Pressing Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driving force distribution devices for four-wheel drive vehicles upsizing leads to increased weight and reduced fuel efficiency, along with larger mounting space requirements, causing interference between clutch operations and limiting mountability.
Innovation Solution
A driving force distribution device configuration with first and second multiple disc clutches, pressure receiving members, and pressing mechanisms, where the pressure receiving member includes annular base portions and projecting pieces to receive pressing forces, preventing interference between clutch operations and reducing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gap is formed between disc portions to prevent clutch interference, then clutch operation reliability is improved, but device axial length increases causing upsizing
Solution Approach 1:
The patent introduces a radial dimension solution by providing pressing members that extend radially from the input shaft to press the friction engagement members axially. This radial arrangement allows the pressing members to apply axial force without requiring axial space, thereby preventing clutch interference while avoiding device upsizing in the axial direction.
Solution Approach 2:
The pressing members act as intermediaries between the input shaft and the friction engagement members. These pressing members transmit the pressing force from the input shaft to the friction engagement members, enabling effective clutch operation without requiring direct contact between disc portions or creating axial gaps.
2Weight of moving object
If device size is reduced to improve fuel efficiency and mountability, then weight and mounting space are reduced, but clutch interference may occur
Solution Approach 1:
By arranging the pressing members radially from the input shaft, the patent eliminates the need for axial gaps between disc portions. This dimensional change allows compact axial packaging while maintaining sufficient spacing between friction engagement members through the radial positioning of pressing members, thus preventing clutch interference in a compact device.
Solution Approach 2:
The patent merges the functions of the input shaft and pressing member support structure into a single integrated input shaft assembly. The pressing members are directly supported by the input shaft, combining structural support and pressing force application functions, which reduces the number of separate components and enables compact device design.
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 solution effectively restrains clutch interference and prevents device upsizing, enhancing fuel efficiency and mountability by allowing precise control of driving forces to the rear wheels while minimizing the device's axial length.
Implementation Method 1
right and left frictional engagement members each placed between the clutch outer portion and a corresponding one of the right and left clutch inners
Data Source
AI summary
A driving force distribution device includes a first output rotational member and a second output rotational member, an input rotational member, a first multiple disc clutch, a second multiple disc clutch, a pressure receiving member, a first pressing mechanism and a second pressing mechanism. The pressure receiving member includes an annular base portion and a plurality of projecting pieces, the projecting pieces include a plurality of first projecting pieces and a plurality of second projecting pieces. The first projecting pieces each have a first pressure receiving surface, the second projecting pieces each have a second pressure receiving surface.