Lower Arm Mounting Unit Cross Configuration
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Solution Overview
Problem
Conventional lower arm mounting units for multi-link suspension systems restrict design freedom and increase weight and manufacturing costs due to the requirement for a minimum distance between ball studs and the need for multiple elements for independent arm mounting.
Innovation Solution
A lower arm mounting unit with a knuckle featuring monolithic mounting protrusions, ball studs, and a dust cover configuration that allows for cross configuration of lower arms with reduced elements and shared nut mounting, enabling independent movement and reduced manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate mounting elements are used for each lower arm, then independent movement of lower arms is achieved, but the number of elements increases and manufacturing cost increases
Solution Approach 1:
The patent combines two separate mounting units into a single integrated mounting unit that accommodates both first and second lower arms. The mounting unit includes a single mounting element with multiple mounting positions, allowing both lower arms to be mounted independently while reducing the total number of mounting elements from two to one, thereby simplifying the overall structure.
Solution Approach 2:
The mounting element is designed with multi-functionality to serve multiple purposes: it provides mounting positions for both the first and second lower arms, supports independent movement of each arm, and integrates dust cover functionality. This universal design eliminates the need for separate dedicated mounting elements for each lower arm.
2Ease of operation
If minimum distance is maintained between ball studs for tool mounting, then proper tool access is ensured, but design degree of freedom and layout are restricted
Solution Approach 1:
The patent transitions from a linear arrangement of ball studs to a spatial configuration where multiple mounting positions are distributed in three-dimensional space around the mounting element. This allows tool access from multiple directions and angles, maintaining adequate clearance for tool operation while enabling more flexible design freedom and layout optimization.
Solution Approach 2:
The mounting element is segmented into multiple distinct mounting positions (first mounting position and second mounting position) that are spatially separated. Each position can accommodate a ball stud independently, allowing tools to access each mounting point without interference while maintaining overall compactness and design flexibility.
3Adaptability or versatility
If multiple elements are used for individual lower arm mounting, then independent arm movement is achieved, but total weight increases
Solution Approach 1:
The patent merges multiple separate mounting elements into a single integrated mounting unit that provides all necessary mounting functions for both lower arms. This consolidation reduces the total weight of the mounting system while maintaining the capability for independent lower arm movement through multiple mounting positions within the unified structure.
Data Source
AI summary
A lower arm mounting unit for a multi-link suspension system having a knuckle rotatably supporting a wheel, and first and second lower arms connecting the knuckle to a vehicle body, may include a pair of mounting protrusions formed to the knuckle, a first ball stud connecting an end portion of the first lower arm to the pair of the mounting protrusions, and a second ball stud connecting an end portion of the second lower arm to the pair of the mounting protrusions and the first ball stud by inserting the end portion of the second ball stud between the pair of the mounting protrusions, the end portion of the first ball stud, and the knuckle.