Light-Alloy Control Arm Eccentric Mounting Against Wear
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Solution Overview
Problem
Control arms made of lightweight materials, such as aluminum, are susceptible to wear and damage due to high operational forces and torques, particularly during eccentric adjustment, leading to potential failure and increased material costs.
Innovation Solution
A control arm design featuring an eccentric bracket with an anchor body and eccentric stops, press-fitted into an elongated hole in the side wall, providing a resilient and interference fit connection that protects against wear and damage while optimizing material usage and installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If control arm bodies are made of lightweight metal to reduce weight, then weight is reduced, but susceptibility to wear and damage increases due to high operational forces
Solution Approach 1:
The patent applies composite material construction by combining lightweight aluminum control arm bodies with steel eccentrics and steel reinforcement elements. The aluminum provides weight reduction while the steel components provide wear resistance and strength, creating a hybrid structure that resolves the contradiction between lightweight design and durability.
Solution Approach 2:
The patent implements local quality enhancement by adding steel reinforcement elements specifically at high-stress areas such as the elongated holes and eccentric mounting points. This localized strengthening allows the control arm to maintain lightweight construction in non-critical areas while providing enhanced wear resistance and damage protection where operational forces are highest.
2Adaptability or versatility
If eccentric adjustment devices are integrated directly into light metal control arms, then adjustment functionality is achieved, but wear and damage to the control arm increases
Solution Approach 1:
The patent introduces steel eccentrics and steel reinforcement elements as intermediary components between the adjustment mechanism and the aluminum control arm body. These intermediary elements absorb the wear and damage from adjustment operations, protecting the lightweight aluminum structure while maintaining full adjustment functionality.
Solution Approach 2:
The patent employs sacrificial steel components such as eccentrics and reinforcement elements that are designed to withstand wear and damage from adjustment operations. These components can be replaced if worn, protecting the more valuable aluminum control arm body from damage while maintaining adjustment capability.
3Adaptability or versatility
If control arms are designed with elongated holes for eccentric mounts, then adjustment capability is enabled, but structural integrity and resistance to damage decrease
Solution Approach 1:
The patent strengthens the areas around elongated holes by adding steel reinforcement elements and plates specifically at these vulnerable locations. This localized strengthening maintains the adjustment capability provided by the elongated holes while compensating for the structural weakness they create in the lightweight aluminum body.
Solution Approach 2:
The patent combines aluminum control arm bodies with steel reinforcement elements at critical locations including around elongated holes. This composite construction allows the structure to maintain adjustment capability through the elongated holes while the steel reinforcement compensates for the reduced structural integrity caused by the hole openings.
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 effectively absorbs and transmits forces, protects the control arm from wear and damage, reduces material costs, and optimizes installation space, while maintaining structural integrity and functionality.
Implementation Method 1
the anchor body of the eccentric bracket and the elongated slot in the side wall of the handlebar are manufactured and configured to each other such that an interference fit is created at the connection points after assembly. This allows longitudinal and transverse forces to be transmitted by friction.
Data Source
Figure 1
Figure 2~5
AI summary
A control arm 1 for a wheel suspension in a motor vehicle has a control arm body 2 made of light alloy. The control arm body 2 has two parallel side walls 3. At least one side wall 3 has an elongated hole 4 for an eccentric bracket 5. The eccentric bracket 5 has a base plate 6 with an elongated opening 7. On the rear side of the base plate 6, an anchor body 8 is provided, extending along the edge of the elongated opening 7. On the front side, the base plate 6 has two eccentric stops 10 projecting from the base plate 6. The eccentric bracket 5 is inserted into the elongated hole 4 of the side wall 3 with the anchor body 8 and press-fitted in the elongated hole 4.