Multi-leg Control Arm with Aligned Elongated Holes for Camber Adjustment
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Solution Overview
Problem
Existing control arms for vehicle wheel suspensions face challenges in adjusting geometry to compensate for manufacturing tolerances and ensuring optimal fastening, which affects driving properties.
Innovation Solution
A multi-leg control arm design with elongated holes in control arm legs that align to define a movement path, allowing a fastening element to adjust and fix the arm relative to the axle and wheel carriers, enabling precise camber and track adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional control arm design is used, then the structure is simple, but the ability to adjust geometry to compensate for manufacturing tolerances is limited
Solution Approach 1:
The control arm incorporates movable control arm legs with elongated holes that allow dynamic adjustment of the control arm geometry. The fastening element can be positioned at different locations along the elongated holes to adjust camber and track, transforming a static structure into a dynamically adjustable one that compensates for manufacturing tolerances.
Solution Approach 2:
The control arm is divided into multiple control arm legs (first, second, third, and fourth legs) that can move independently relative to each other. This segmentation allows each leg to be adjusted separately to achieve the desired geometry compensation while maintaining overall structural integrity.
2Adaptability or versatility
If the control arm is rigidly fixed, then the connection is stable, but the ability to adjust camber and track is lost
Solution Approach 1:
The control arm uses movable legs with elongated holes instead of rigid fixed connections. The fastening element secures the legs at specific positions along the elongated holes, providing both adjustability and stability. This dynamic design allows the control arm to be configured for different geometries while maintaining stable connections during operation.
Solution Approach 2:
The fastening element acts as an intermediary between the control arm legs and the adjustment mechanism. It penetrates the elongated holes and secures the legs at desired positions, mediating between the need for adjustment and the need for stable connection.
3Measurement precision
If multiple separate components are used for adjustment, then the adjustment precision is high, but the device complexity increases
Solution Approach 1:
The patent combines multiple control arm legs into a single integrated control arm structure with elongated holes built into the legs themselves. The fastening element serves multiple functions by penetrating both elongated holes simultaneously, reducing the need for separate adjustment components while maintaining high adjustment precision through the aligned hole geometry.
Data Source
AI summary
A multi-leg control arm for a wheel suspension in a vehicle, includes first and second control arm legs coupling the multi-leg control arm to an axle carrier, and third and fourth control arm legs coupling the multi-leg control arm to a wheel carrier. The first and/or third control arm leg comprises a first elongated hole, and the second and/or fourth control arm leg comprises a second elongated hole. The first and second elongated holes are aligned with one another and define a movement path of the multi-leg control arm with respect to the axle carrier or the wheel carrier. At least one fastening element penetrates the first and second elongated holes and is adapted to fix the multi-leg control arm with respect to the axle carrier or the wheel carrier in a movement position on the movement path to set a control arm camber or a control arm track.