Torque Rod Liquid Attenuation Device for Heavy Load Vibration
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Solution Overview
Problem
Conventional torque rods face challenges in achieving effective vibration attenuation due to limited space for liquid-based systems, relying primarily on elastic deformation of rubber materials, which is inadequate for durability under repeated heavy loads.
Innovation Solution
Incorporation of a liquid attenuation device with a base plate, insulator, pressure plate, and diaphragms that allow liquid flow between chambers upon load or vibration, enhancing vibration attenuation beyond traditional rubber-based systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration attenuation using liquid flow (hydraulic mount) is applied to the torque rod, then vibration attenuation performance is improved, but device complexity and space requirements increase
Solution Approach 1:
The attenuation device is nested within the existing torque rod structure, specifically utilizing the space between the rod and end plate. The liquid chambers are integrated into the base plate and insulator components that are already part of the torque rod assembly, allowing liquid-based vibration attenuation without significantly increasing overall device complexity or space requirements.
Solution Approach 2:
The attenuation device is divided into separable components including the base plate with first liquid chamber, insulator with second liquid chamber, and pressure plate. This segmentation allows for easier manufacturing, assembly, and maintenance while achieving the desired vibration attenuation performance through the combined liquid flow mechanism across multiple chambers.
2Reliability
If the size of the torque rod is increased to accommodate liquid chambers and insulator, then vibration attenuation performance is improved, but ease of operation and installation deteriorate
Solution Approach 1:
The liquid chambers are nested within the existing structural components (base plate and insulator) rather than adding external attachments. This integration allows the attenuation functionality to be achieved without significantly increasing the external dimensions of the torque rod, maintaining ease of installation in confined engine bay spaces.
Solution Approach 2:
The attenuation device is designed as a pre-assembled unit that can be installed as a complete component during torque rod replacement. The liquid chambers are pre-filled and sealed within the base plate and insulator structure, eliminating the need for complex on-site assembly or liquid filling operations, thereby simplifying installation procedures.
3Ease of manufacture
If conventional rubber-based vibration attenuation is used, then ease of manufacture and simplicity are maintained, but vibration attenuation performance under heavy loads deteriorates
Solution Approach 1:
The patent introduces liquid-based hydraulic attenuation chambers within the torque rod structure. The liquid (oil or water) flows through passages in the base plate and insulator in response to vibrations and loads, providing superior damping performance compared to rubber elasticity alone. This hydraulic mechanism maintains manufacturing feasibility while significantly improving vibration attenuation under heavy load conditions.
Solution Approach 2:
The attenuation device combines multiple materials and mechanisms: liquid damping medium (oil or water), elastomeric insulator material, and rigid structural components (base plate, pressure plate). This composite approach integrates the advantages of liquid hydraulics for heavy load attenuation with the simplicity and flexibility of rubber-based components, achieving enhanced overall performance while maintaining ease of manufacture.
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 provides additional vibration attenuation through liquid flow, complementing rubber-based deformation, improving durability and performance under heavy loads, and allowing for easy replacement and installation on conventional torque rods.
Implementation Method 1
an insulator formed of an elastically deformable material and attached to a remaining surface of the base plate, the insulator having a second liquid chamber hole formed at a position at which the second liquid chamber hole communicates with the flow path hole
Implementation Method 2
an attenuation device configured to cause flow of a liquid therein according to a load or vibration transferred from the rod
Data Source
AI summary
A torque rod, in which a front rubber and a rear rubber are respectively disposed at front and rear sides of a partition of a case fixed to a sub-frame and in which a pipe portion of a rod connected at a front end portion thereof to a power train passes through the front rubber, the partition, and the rear rubber and is coupled to an end plate, may include an attenuation device configured to cause flow of a liquid therein according to a load or vibration transferred from the rod, wherein the attenuation device is separably mounted between the rod and the end plate.