Single-Piece Shock Tower with Vertical Control Arm Couplings
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Solution Overview
Problem
Existing vehicle suspension structures face challenges in efficiently absorbing vibrations from uneven road conditions while maintaining cost-effectiveness and ease of manufacturing and repair, particularly in the design of the front shock tower.
Innovation Solution
A single-piece shock tower design with the front coupling of the upper control arm positioned above and the rear coupling positioned below, allowing for a pass-through gap that exposes a significant portion of the upper control arm, and is fabricated using vacuum-assisted high-pressure die casting from aluminum alloy, with specific attachment points and structural reinforcement for enhanced strength and stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-piece shock tower design is used, then manufacturing complexity is reduced and assembly is simplified, but achieving proper control arm coupling positioning and exposure is more difficult
Solution Approach 1:
The shock tower integrates multiple functions into a single piece structure, combining the shock mounting features, control arm coupling attachments, and structural support elements all in one component. This merging reduces the number of separate parts and assembly steps while maintaining precise coupling positioning through integrated design features.
Solution Approach 2:
The shock tower incorporates localized structural features at specific positions, such as reinforced coupling attachment zones, precisely positioned mounting surfaces, and strategically placed rib structures. These local quality enhancements ensure proper positioning and exposure of control arm couplings while maintaining overall manufacturing simplicity.
2Ease of operation
If the front coupling is positioned above and rear coupling below the shock tower, then control arm movement is improved and hood profile can be lowered, but the structural complexity increases
Solution Approach 1:
The shock tower design transitions from a conventional horizontal coupling arrangement to a vertical arrangement, with the front coupling positioned above and the rear coupling positioned below. This dimensional change in coupling orientation enables improved control arm movement arcs and allows for a lower hood profile while managing structural complexity through integrated support features.
Solution Approach 2:
The shock tower incorporates segmented rib structures and localized reinforcement zones that provide structural support for the vertical coupling arrangement. These segmented features are strategically placed to manage the structural complexity introduced by the vertical coupling configuration while enabling the desired control arm movement.
3Weight of moving object
If aluminum alloy is used for the shock tower, then weight is reduced and manufacturing cost is lowered, but manufacturing precision and strength may be compromised
Solution Approach 1:
The shock tower is constructed from aluminum alloy, utilizing this lightweight material's properties while compensating for any strength limitations through strategic structural design. The aluminum alloy provides weight reduction and cost benefits, while the overall strength requirements are met through the integrated rib structures and optimized thickness distributions in critical areas.
Solution Approach 2:
The shock tower employs localized thickness variations and strategic reinforcement zones within the aluminum alloy structure. Critical areas such as coupling attachment points and shock mounting zones feature enhanced material distribution and rib support, ensuring adequate strength in these locations while maintaining overall weight reduction and cost-effectiveness.
4Ease of operation
If a pass-through gap is created to expose the upper control arm, then vibration absorption and control arm movement are improved, but structural integrity may be compromised
Solution Approach 1:
The shock tower incorporates a pass-through gap that allows the upper control arm to be exposed and move freely for improved vibration absorption and suspension operation. The surrounding structural elements, including reinforced edges and supporting rib structures, are designed to maintain structural integrity while accommodating this opening.
Solution Approach 2:
The shock tower structure is segmented to create the pass-through gap, with strategic placement of reinforcing ribs and support features around the opening. This segmentation allows the control arm movement function while the distributed reinforcement maintains overall structural integrity.
Data Source
AI summary
A front structure for a vehicle is provided, the structure including a single piece shock tower and an upper control arm, where the front coupling of the upper control arm is attached to the shock tower at a location directly above a corresponding surface of the shock tower such that the front coupling is exposed from above, and where the rear coupling of the upper control arm is attached to the shock tower at a location directly below a corresponding surface of the shock tower such that the rear coupling is unexposed from above.