U-Shaped Reinforcement for Vehicle Window Crossbeam Vibration
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Solution Overview
Problem
Existing solutions for attenuating vibrations in motor vehicle lower bay crossmembers are limited by requiring precise geometric fit, are only adaptable to U-shaped profiles, and complicate the assembly process, leading to production inefficiencies and scrapped parts.
Innovation Solution
A reinforcement part with a U-shaped profile and additional features such as fixing lugs, vertical lugs, and a complementary reinforcing element that can be fixed directly to the apron, allowing for flexible attachment to variously shaped crossmembers, reducing the need for precise geometric alignment and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a U-shaped reinforcement element is housed within a U-shaped cross member to form a closed box for vibration damping, then vibration damping effectiveness is improved, but manufacturing precision requirements increase and adaptability to different cross member shapes decreases
Solution Approach 1:
Instead of placing the reinforcement element inside the cross member cavity, the patent inverts the approach by positioning the U-shaped reinforcement element on the external surface of the cross member. The reinforcement element's legs extend into the cross member cavity and are welded to the internal surfaces, eliminating the need for precise external dimensional matching while maintaining vibration damping effectiveness.
Solution Approach 2:
The patent transitions from a two-dimensional fit (external surface matching) to a three-dimensional solution where the reinforcement element's legs extend into the cavity space. This dimensional change allows the reinforcement to be secured through internal welding points rather than requiring precise external geometric alignment.
2Object-affected harmful factors
If a U-shaped reinforcement element is housed within a U-shaped cross member to form a closed box for vibration damping, then vibration damping effectiveness is improved, but adaptability to different cross member profiles decreases
Solution Approach 1:
The external mounting configuration with internal leg extension makes the reinforcement element universally applicable to various cross member profiles (U-shaped, C-shaped, I-shaped, or custom profiles). The reinforcement element maintains its vibration damping function while adapting to different geometries through flexible positioning and multiple potential welding locations on the internal surfaces.
Solution Approach 2:
The reinforcement element's position and orientation can be dynamically adjusted during assembly to match different cross member profiles. The legs can be bent or positioned at various angles to optimize attachment to the internal surfaces of different profile types, providing versatility across applications.
3Object-affected harmful factors
If a U-shaped reinforcement element is housed within a U-shaped cross member to form a closed box for vibration damping, then vibration damping effectiveness is improved, but assembly complexity increases due to welding access difficulties
Solution Approach 1:
By inverting the mounting approach and placing the reinforcement element externally with legs extending internally, the welding operations can be performed from the internal cavity side where tool access is facilitated. This eliminates the difficulty of reaching weld areas from the external surface through narrow gaps.
4Strength
If precise dimensions are used to secure the reinforcement element to the cross member, then structural reinforcement is improved, but production efficiency decreases due to part discarding
Solution Approach 1:
The reinforcement element is segmented into a main body and multiple legs that can independently engage with the cross member structure. This segmentation allows for tolerance compensation - if one leg's positioning is slightly off, the other legs can still provide adequate attachment, reducing the need to discard parts due to minor dimensional variations.
Solution Approach 2:
The design allows for parameter variations in the reinforcement element's leg dimensions and positioning without compromising structural reinforcement. This parameter flexibility enables production tolerances to be wider, maintaining strength while improving production efficiency by reducing part discarding.
Data Source
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AI summary
A part (5) for reinforcing a lower crossbeam for a window opening attached to a motor vehicle firewall, the reinforcing part having, in cross-section, a U-shaped profile, said reinforcing part being provided with a bottom wall and two side walls together defining a cavity, wherein the side walls are both attached to a lower face of the lower crossbeam of the window opening, the cavity (11) being opposite the lower face, the reinforcing part being further attached to the firewall.