Vehicle Power Train Mount with Stopper Bracket
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Solution Overview
Problem
Conventional power train support systems in vehicles face challenges in preventing rearward movement of the power train when an external force is applied, often requiring increased strength and weight of components or additional stopper mechanisms, which can increase cost and reduce flexibility in layout.
Innovation Solution
A support system with a mount device featuring a central shaft and rubber isolator, mount brackets, extension brackets, and a U-shaped stopper bracket that contacts the extension bracket to prevent rearward movement without adding new components or increasing bolt diameters, allowing for reduced weight and vibration attenuation through a longer vibration transmission path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the strength of the mount device, mount bracket, and bolts is increased to prevent rearward movement of the power train, then the reliability is improved, but the weight and cost increase
Solution Approach 1:
The support system is divided into multiple functional segments: the mount device with rubber isolator for vibration attenuation, the stopper bracket for rearward movement prevention, and the extension brackets for structural support. Each segment performs a specific function, allowing the system to achieve reliability without requiring excessive strength in any single component.
Solution Approach 2:
The stopper bracket acts as an intermediary element between the mount device and the extension brackets. It provides the stopping function for rearward movement without requiring the mount device or bolts to bear excessive loads, thereby maintaining reliability while controlling weight.
2Reliability
If new stopper mechanisms or increased component strength are added to prevent power train movement, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The stopper bracket serves multiple functions: it prevents rearward movement of the power train, provides structural support between the mount device and extension brackets, and works in conjunction with the rubber isolator for vibration attenuation. This multi-functionality reduces the need for additional separate components, maintaining reliability while controlling complexity.
Solution Approach 2:
The stopper function is merged with the structural support function in the stopper bracket design. Rather than adding a separate stopper mechanism, the bracket is designed to perform both stopping and supporting functions, thereby improving reliability without significantly increasing device complexity.
3Strength
If the thickness of the mount device and mount bracket is increased to ensure strength, then the reliability is improved, but the weight and cost increase
Solution Approach 1:
Instead of uniformly increasing the thickness of all components, the design applies strength enhancements locally where needed. The stopper bracket is positioned and dimensioned to provide sufficient stopping force, while the rubber isolator provides flexibility and vibration attenuation. This localized approach ensures adequate strength without unnecessary weight increase.
Solution Approach 2:
The mount device uses a composite structure combining rigid components (metal brackets) with flexible materials (rubber isolator). This composite approach allows the rigid parts to be thinner since the rubber provides additional structural support and vibration damping, thereby reducing overall weight while maintaining or improving strength.
4Strength
If the nominal diameter or strength classification of bolts is increased to ensure strength, then the reliability is improved, but the weight and cost increase
Solution Approach 1:
The fastening system is segmented into multiple bolts distributed at different locations (mount brackets to extension brackets, stopper bracket to outer cylinder). This distribution allows the use of smaller diameter bolts rather than requiring a few large-diameter bolts, reducing total weight while maintaining overall joint strength and reliability.
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
Effectively prevents significant rearward movement of the power train while reducing weight and cost by utilizing existing components and enhancing vibration attenuation, allowing for more compact installation in limited spaces.
Implementation Method 1
a support system of a vehicle power train which brings a stopper bracket of a mount device into contact with an extension bracket when a power train is moved rearward of a vehicle by an external force applied to a front portion of the vehicle, thereby preventing the power train from being significantly moved rearward of the vehicle
Implementation Method 2
a mount device in which a central shaft having an axis extending in a vertical direction of a vehicle is connected via a rubber isolator to an inner periphery of an outer cylinder having an axis extending in a vertical direction of the vehicle
Data Source
AI summary
A vehicle power train support system composed of a plurality of support units including right and left support units. One paired support unit has a mount device mounted on the side members and includes an outer cylinder and a central shaft having an axis extending in a vertical direction of the vehicle, mount brackets secured to front and rear portions of the outer cylinder, extension brackets disposed, with a predetermined space therebetween in the longitudinal direction of the vehicle, to an upper portion of the side member, a further mount bracket secured to the power train, the another mount bracket being connected to a lower end of the central shaft protruding downward from a bottom portion of the outer cylinder, and a U-shaped stopper bracket mounted to a lower portion of the outer cylinder, the U-shaped stopper bracket surrounding front, lower and rear portions of the further mount bracket.