H-Shape Light-Alloy Suspension Member Torque Rod Rigidity
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Solution Overview
Problem
Light-alloy suspension members formed by casting have lower rigidity due to an open sectional shape, leading to ineffective suppression of engine movements caused by torque rod input.
Innovation Solution
A light-alloy vehicle suspension member with a substantially H-shape form, featuring a horizontal upper wall, vertical front and rear walls, and reinforced torque rod mounting portions with vertical and diagonal ribs, enhancing rigidity and allowing effective input absorption from the torque rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a light-alloy suspension member is formed integrally by casting, then weight is reduced and productivity is improved, but the suspension member cannot have a closed sectional shape and has lower rigidity
Solution Approach 1:
The patent transitions from a conventional planar cross-sectional view to a three-dimensional H-shaped configuration with vertical walls extending upward from the bottom wall. This dimensional addition creates enclosed spaces and increases the section modulus, thereby enhancing rigidity while maintaining the cast light-alloy construction method.
Solution Approach 2:
The suspension member employs a composite structural design combining horizontal bottom and upper walls with vertical front and rear walls to form an H-shaped cross-section. This composite geometry creates multiple load-bearing surfaces and enclosed volumes that work together to resist torsional forces, achieving high rigidity in a cast light-alloy component.
2Ease of manufacture
If the suspension member has an open sectional shape, then it can be formed by casting, but it is subjected to torsion from the torque rod and cannot effectively suppress engine movements
Solution Approach 1:
By adding vertical walls that extend upward from the bottom wall to form an H-shaped cross-section, the patent creates a three-dimensional structure that resists torsional forces more effectively than a simple open channel section. This dimensional enhancement allows the cast structure to maintain formability while achieving the reliability needed to suppress engine movements.
Solution Approach 2:
The patent incorporates curved transition regions between the horizontal walls and vertical walls, as well as rounded corners in the H-shaped cross-section. These curved features reduce stress concentration points and improve the flow of molten alloy during casting, ensuring manufacturing feasibility while maintaining structural integrity for reliable engine movement suppression.
Data Source
AI summary
A light-alloy vehicle suspension member integrally made from a light alloy, including a sectional shape formed by an upper wall, a front wall, and a rear wall so as to have an open bottom, the upper wall being substantially horizontal, the front wall and the rear wall being erected in a substantially vertical manner on a front edge and a rear edge of the upper wall respectively, wherein: one end of a torque rod is connected to a center portion, in a vehicle width direction, of the upper wall, another end of the torque rod is connected to an engine; a vertical position of the upper wall substantially corresponds to a vertical center position between the front wall and the rear wall, and substantially corresponds to a height position of the torque rod.