Anti-Vibration Mount With Immobilizing Strap For Powertrain
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Solution Overview
Problem
Existing anti-vibration mounts for vehicle powertrains are expensive to manufacture due to complex components and materials.
Innovation Solution
A simplified anti-vibration mount design where the second mounting member is immobilized by the strap on the vehicle body in multiple directions, with a bridge portion cooperating with the bracket and an elastomer body forming hydraulic chambers for shock absorption, using materials like aluminum alloys and plastics, and clips for secure assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex anti-vibration mount design with multiple components is used, then the shock absorption performance is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple functions into a single integrated anti-vibration mount structure. The mounting member integrates the elastomer body, hydraulic chamber, and movement limiting features into one component that replaces multiple separate parts, achieving both shock absorption and cost reduction through consolidation
Solution Approach 2:
The mounting member is designed to perform multiple functions simultaneously: it provides shock absorption through the elastomer body, hydraulic damping through the liquid-filled chamber, static load support, and movement limitation in multiple directions. This multi-functionality eliminates the need for separate components for each function
2Ease of manufacture
If a simplified anti-vibration mount design is used, then the manufacturing cost is reduced, but the shock absorption performance may be compromised
Solution Approach 1:
The patent incorporates a hydraulic chamber filled with liquid that provides damping through fluid resistance. As the mounting member moves, the liquid flows through restricted passages creating hydraulic damping that enhances shock absorption performance while maintaining a simplified single-piece structure
Solution Approach 2:
The elastomer body's physical parameters are optimized to provide nonlinear damping characteristics. The elastomer's viscoelastic properties change with temperature, frequency, and deformation magnitude, allowing the mount to adapt its shock absorption behavior to different operating conditions while maintaining structural simplicity
3Stability of the object's composition
If the second mounting member is firmly immobilized on the vehicle body, then the stability is improved, but the ability to accommodate vibrations is reduced
Solution Approach 1:
The mounting member transitions from a static rigid connection to a dynamic system that adapts to vibrations. The elastomer body and hydraulic chamber create a compliant connection that remains stable in its mounted state while dynamically responding to vibrational inputs through controlled movement and fluid flow
4Adaptability or versatility
If the elastomer body allows relative movements in multiple directions, then the adaptability is improved, but the control over movement becomes more difficult
Solution Approach 1:
The mounting member employs self-centering features where the elastomer body's elastic properties automatically guide the component back to its neutral position after displacement. The hydraulic chamber provides progressive resistance that naturally limits extreme movements without requiring external control mechanisms, allowing multi-directional adaptability while maintaining inherent movement control
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 design results in a less costly and more efficient anti-vibration mount that effectively supports static loads and allows for relative movements, reducing manufacturing expenses while maintaining performance.
Implementation Method 1
an elastomer body connecting the first mounting member to the second mounting member and capable of supporting a static load (for example part of the weight of the powertrain of the vehicle) applied to the first mounting member in a first, substantially vertical direction
Implementation Method 2
allowing relative movements between the first and second mounting members at least in the first direction and in second and third directions
Implementation Method 3
an anti-vibration mount connecting said vehicle powertrain and said vehicle body for the purposes of shock absorption and support
Data Source
AI summary
An anti-vibration assembly is disclosed including a rigid bracket fixed to a vehicle powertrain, a vehicle body and an anti-vibration mount including: a first tubular mounting member, in which the bracket is received; a second mounting member fixed to vehicle body; an elastomer body connecting the first mounting member to the second mounting member; and a rigid strap including two legs and a top. The second mounting member is fitted in the two legs of the strap in the first direction upwards and is pressed by said two legs directly on the vehicle body in said first direction. The strap further includes a bridge portion joining the two legs under the bracket.