Upper Center Beam Attachment Structure for Hood Alignment
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Solution Overview
Problem
Conventional attachment structures for vehicle components, such as the upper center beam and hood, often result in significant gaps and steps due to misalignment caused by error tolerances in vehicle parts, leading to inconsistent assembly quality.
Innovation Solution
An upper center beam attachment structure featuring a first stay and a bolt system with clearance holes and bolt holes, allowing for precise alignment and fixation of the upper center beam to the stay, which in turn is attached to the vehicle body, thereby reducing the gap and step between the hood and the bumper face.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cross member is aligned to the left and right components of the vehicle body, then the assembly process is simplified, but the gap and step between the hood and bumper face become large due to misalignment
Solution Approach 1:
The patent introduces a temporary jig as an intermediary component that mediates between the cross member and the hood. The temporary jig includes a positioning protrusion that fits into a positioning groove, creating a precise intermediary alignment mechanism that transfers the alignment reference from the cross member to the hood, thereby reducing the gap and step while maintaining assembly simplicity
Solution Approach 2:
The patent applies preliminary action by pre-positioning the temporary jig on the cross member before final assembly. The temporary jig is installed in advance with its positioning protrusion engaging the positioning groove on the hood, establishing the correct alignment relationship before the bumper face is fixed to the cross member, thus preventing large gaps and steps
2Device complexity
If conventional alignment methods are used, then the assembly structure is simple, but the alignment precision between the upper center beam and hood is insufficient
Solution Approach 1:
The temporary jig serves as an intermediary alignment device that adds minimal structural complexity while significantly improving alignment precision. The positioning protrusion and positioning groove form a simple yet effective intermediary mechanism that ensures precise alignment between the upper center beam and hood without requiring complex alignment procedures
Solution Approach 2:
The patent replaces complex mechanical alignment procedures with a simple geometric locking mechanism. Instead of using complex adjustment mechanisms or multiple alignment references, the invention uses the straightforward engagement of a positioning protrusion with a positioning groove to achieve precise alignment, substituting complex mechanical processes with a simple geometric constraint
Data Source
AI summary
An upper center beam attachment structure includes an upper center beam and a first stay. The upper center beam extends in a third direction, and has a center beam attachment side surface facing the third direction. The first stay extends in a first direction and a second direction, and has a first stay attachment side surface facing a direction opposite to the third direction. One of the center beam attachment side surface and the first stay attachment side surface includes a clearance hole, and the other includes a bolt hole. In a state where the center beam attachment side surface and the first stay attachment side surface face each other, the center beam attachment side surface and the first stay attachment side surface are fixed together by a bolt inserted into the clearance hole and the bolt hole so as to fix the upper center beam to the first stay.