Aluminium Cradle Guide Means for Wheel Triangle Alignment
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Solution Overview
Problem
Aluminum cradles for vehicles, manufactured through extrusion and machining, face difficulties in assembling wheel triangles due to the absence of bosses in the extrusion process, leading to increased complexity and jamming issues during engagement.
Innovation Solution
Incorporating guide means such as transverse ribs and chamfered edges on the vertical and horizontal components of the cradle to facilitate the alignment and engagement of wheel triangle parts with anchor points, reducing the likelihood of jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the extrusion process is used to manufacture aluminum cradles, then manufacturing efficiency and material strength are improved, but the ability to facilitate easy wheel triangle engagement deteriorates due to the absence of bosses
Solution Approach 1:
The engagement interface is segmented into multiple functional elements: vertical walls provide lateral constraint, guide means (ribs/chamfers) provide alignment and insertion guidance, and holes provide final anchoring. This segmentation allows each element to perform its specific function optimally without requiring bosses.
Solution Approach 2:
Guide means (transverse ribs or chamfered edges) act as intermediary elements between the wheel triangle and the vertical walls. These intermediaries facilitate the transition from free movement to constrained positioning, enabling easy engagement without bosses by providing a gradual alignment path.
2Manufacturing precision
If clearance between vertical walls is reduced to improve precision, then positioning accuracy is improved, but the risk of jamming during engagement increases
Solution Approach 1:
The guide means perform preliminary alignment action before the wheel triangle contacts the vertical walls. The ribs or chamfers guide the wheel triangle into correct position first, ensuring that when clearance is reduced, the components are already aligned and jamming is prevented.
Solution Approach 2:
The guide means extend the engagement process into an additional spatial dimension by providing longitudinal guidance features (ribs or chamfers) that work in conjunction with the lateral constraint of vertical walls. This multi-dimensional guidance system maintains reliability even with reduced clearance.
3Measurement precision
If alignment tolerances are tightened to improve engagement precision, then positioning accuracy is improved, but the difficulty of assembly increases
Solution Approach 1:
The guide means enable the wheel triangle to self-align with the vertical walls during assembly. The ribs or chamfers automatically guide the component into correct position without requiring precise manual alignment, thereby maintaining high positioning accuracy while reducing assembly difficulty.
Data Source
Figure 1~2
Figure 3~5
AI summary
An aluminum cradle (BA) is fitted to a vehicle and includes a crossmember (TB) having two opposite ends, to each of which is fixedly attached a transversely extruded front anchorage piece (PAV) comprising two vertical walls (PV) with holes defining a longitudinal anchorage point (PA1) for anchoring a front portion (PVT) of a wheel triangle, and a rear extension (PB) comprising two horizontal wings (AH) with holes defining another vertical anchorage point (PA3) for anchoring a rear portion (PRT) of this wheel triangle. One of the vertical walls (PV) of each front anchorage piece (PAV) and the horizontal wings (AH) of each rear extension (PB) respectively include first (MG1) and second (MG2) guiding means that guide the front (PVT) and rear (PRT) portions of the wheel triangle during their respective positioning relative to the two anchorage points (PA1, PA3).