Three-Point Bearing Mount for Drive Unit Vibration Decoupling

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Existing front axle auxiliary frames for securing drive units in transportation vehicles are overly complex and prone to oscillating movements due to their four-point bearing systems, which require precise alignment and spacing to effectively absorb vibrations, leading to potential oscillations and noise issues during speed changes and braking maneuvers.

Innovation Solution

A front axle auxiliary frame with a three-point bearing system, where two bearings are oriented along the transverse axis and one along the longitudinal axis, allowing for flexible orientation and absorption of oscillations in any direction, reducing the need for precise alignment and enhancing vibration decoupling from the vehicle body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a four-point bearing system is used to secure the drive unit, then the drive unit is supported and decoupled from the vehicle body, but the system becomes overly complex and requires precise alignment and spacing to effectively absorb vibrations

Engineering Contradiction:
Improvevibration decoupling effectivenessVSAvoidbearing system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts one bearing from the traditional four-point bearing system, reducing it to a three-point bearing system. This simplifies the bearing arrangement while maintaining effective vibration decoupling. The mounting device secures the drive unit with three bearings instead of four, eliminating the complexity of precise alignment and spacing requirements between multiple bearings while still achieving the necessary vibration isolation.

Inventive Principle:
Principle #2Taking out (Extraction)

2Reliability

If a four-point bearing system is used with specific securing bearings, then the drive unit is supported, but oscillating movements occur during speed changes and braking maneuvers due to mass inertia

Engineering Contradiction:
Improvedrive unit support stabilityVSAvoidoscillating movements and noise
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the fundamental parameter of the bearing system from four points to three points. This parameter change fundamentally alters how the drive unit is supported and how oscillations are absorbed. The three-point system with its specific orientation (two bearings along the transverse axis, one along the longitudinal axis) better accommodates the mass inertia effects during speed changes and braking, reducing harmful oscillating movements and noise while maintaining stable support.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If precise alignment and spacing of bearings is implemented, then vibration absorption is improved, but manufacturing and assembly difficulty increases

Engineering Contradiction:
Improvevibration absorption capabilityVSAvoidassembly precision requirement
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

By removing one bearing from the four-point system, the patent eliminates the need for complex precise alignment and spacing requirements between multiple bearings. The three-point system is inherently more tolerant of manufacturing variations and easier to assemble, while still providing effective vibration absorption through its optimized bearing orientation and mounting device design.

Inventive Principle:
Principle #2Taking out (Extraction)

4Reliability

If a four-point bearing system is used, then the drive unit is secured, but the system is prone to oscillating movements and noise issues

Engineering Contradiction:
Improvedrive unit securingVSAvoidnoise propagation
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the bearing system parameter from four points to three points, which fundamentally improves the securing of the drive unit while reducing noise propagation. The three-point configuration with optimized orientation better handles the dynamic loads during operation, reducing oscillating movements that generate noise. The mounting device design further enhances this by providing secure attachment while isolating vibrations and noise from the vehicle body.

Inventive Principle:
Principle #35Parameter changes

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 three-point bearing system effectively absorbs and reduces oscillations in various directions, improving driving safety, comfort, and chassis longevity by decoupling the drive unit from the vehicle body, while allowing for flexible assembly and reduced noise propagation.

Implementation Method 1

absorb and damp the oscillating movements of the drive unit about a transportation vehicle transverse axis

Methodology Applied
Scientific EffectVibration damping: Damping

Data Source

PatentUS11279407B2Front axle supporting frame comprising a mounting device for a drive unit
Publication Date: 2022.03.22 VOLKSWAGEN AG
  • US11279407B2 patent drawing
  • US11279407B2 patent drawing
  • US11279407B2 patent drawing

AI summary

A front axle supporting frame for mounting a drive unit of a transportation vehicle including a first longitudinal beam and a second longitudinal beam which extend substantially along a longitudinal transportation vehicle axis, as well as a first cross-beam and a second cross-beam which extend substantially along a transverse transportation vehicle axis, the first cross-beam is located in front of the second cross-beam when viewed in a direction of travel. A three-point mounting device for the drive unit is provided on the cross-beams.