Integrated Cab Mount Vibration Isolator with Dynamic Damper
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Solution Overview
Problem
Existing vibration isolators for vehicles face challenges in integrating a dynamic damper with a mass and elastic connector, leading to increased manufacturing costs and complexity due to separate assembly requirements.
Innovation Solution
A vibration isolator design that connects a dynamic damper with a mass and elastic connector to an inner tube, using a cylindrical connecting member and supporting member to elastically link the mass and connector, allowing for resonance vibration reduction by adjusting the mass and connector rigidity to match the resonance frequency of the vibration sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the dynamic damper is assembled separately to the cab, then the vibration isolator structure remains simple, but the number of assembly steps increases and manufacturing cost decreases
Solution Approach 1:
The patent combines the dynamic damper (mass and elastic connector) with the vibration isolator into a single integrated assembly. The mass is disposed on the outer peripheral side of the outer tube, and the elastic connector elastically connects the mass with the outer tube, creating a unified structure that eliminates separate assembly operations while maintaining functional independence of each component
2Ease of manufacture
If the dynamic damper is integrated with the vibration isolator, then the manufacturing cost is reduced, but the device complexity increases due to additional components
Solution Approach 1:
The outer tube serves dual functions: as part of the vibration isolator structure and as a mounting support for the dynamic damper components. The elastic body between the inner and outer tubes provides both vibration isolation and structural connection, allowing the same components to fulfill multiple roles and reducing the need for additional specialized parts
3Reliability
If the mass and elastic connector are connected to the inner tube, then resonance vibration is reduced, but the connecting structure becomes more complex
Solution Approach 1:
The elastic connector acts as an intermediary element that connects the mass to the outer tube while providing the necessary elastic coupling for dynamic damping. This intermediary component enables the mass to move independently and counteract resonance vibrations without requiring direct rigid connection, simplifying the overall connecting structure
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 integration reduces the number of assembly steps and manufacturing costs by providing the dynamic damper as a part of the vibration isolator, effectively damping vibrations and reducing resonance through inertia force.
Implementation Method 1
an elastic body disposed between the outer tube and the inner tube to elastically connect the outer tube and the inner tube
Implementation Method 2
a mass disposed on an outer peripheral side of the supporting member; and an elastic connector fixed to the supporting member to the mass so as to elastically connect the mass with the connecting member
Implementation Method 3
it is necessary to connect the dynamic damper (the elastic connector and the mass) to the other end of the inner tube to reduce resonance vibration of the cab
Implementation Method 4
damper solution stored in a liquid chamber within the outer tube and a damper member fixed to an lower end of the inner tube and is soaked into the damping fluid... by viscous resistance that is applied to the damping member from the damping fluid
Data Source
AI summary
A dynamic damper containing a mass and an elastic connector is connected to an inner tube to provide the dynamic damper integrally as a part of an apparatus. Since the dynamic damper is integrally provided as part of the apparatus (cab mount) by connecting the dynamic damper containing the mass and the elastic connector to the inner tube via a connecting member in the cab mount, it is possible to eliminate work for assembling the dynamic damper separately from the cab mount. Further, the dynamic damper may be constructed integrally as part of the cab mount.