Modular Door Guide Profile Rail for Curved Tolerance Control
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Solution Overview
Problem
Existing profile rails for vehicle door guides face challenges in maintaining manufacturing tolerances, especially in curved sections, leading to uneven running and noise during door operation, due to complex manufacturing methods and thermal expansions.
Innovation Solution
A modular profile rail system with separate profile rail pieces connected via a plug-in system, allowing for flexible assembly and compensation of manufacturing and thermal tolerances, ensuring smooth operation and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a one-piece profile rail is used, then manufacturing complexity is reduced, but manufacturing precision deteriorates due to high tolerances required in curved sections
Solution Approach 1:
The profile rail is divided into multiple separate profile rail pieces that can be manufactured independently with standard tolerances and then connected using connection pieces. This segmentation allows each component to be produced with relaxed tolerances while maintaining overall assembly precision through the modular connection system.
2Manufacturing precision
If separate profile rail pieces are connected, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
Connection pieces serve as intermediary elements between profile rail pieces, providing a standardized interface for assembly. These connection pieces absorb dimensional variations and tolerance accumulations, enabling precise final assembly while managing the complexity of having multiple components through a unified connection methodology.
3Stability of the object's composition
If a rigid one-piece profile rail is used, then structural stability is improved, but adaptability to thermal changes deteriorates
Solution Approach 1:
The modular profile rail system introduces controlled flexibility through separate components and connection pieces, allowing the structure to dynamically adapt to thermal expansions and contractions. Each module can move slightly relative to others, accommodating dimensional changes while maintaining overall structural integrity and guide function.
4Manufacturing precision
If high manufacturing tolerances are enforced, then guide means running smoothness is improved, but productivity deteriorates
Solution Approach 1:
By segmenting the profile rail into standardized modules connected by connection pieces, the system achieves smooth running characteristics through precise modular interfaces rather than requiring ultra-precise monolithic manufacturing. This approach maintains guide means smoothness while enabling faster, more efficient assembly of door guide systems.
Data Source
AI summary
A profile rail for a door guide of a vehicle, comprises a first profile rail piece with a first end face and with a second end face, and a connecting piece. The connecting piece comprises a first end and a second end. The first end of the connecting piece comprises a first end-face connection region for connecting to the first profile rail piece. The connecting piece is designed as a separate profile rail piece. The connecting piece can be connected via the first end-face connection region to at least one end face of the first profile rail piece by means of a plug-in system. The first end-face connection region is arranged in a first connection plane which has a first angle to a first plane normal to an extension of the connecting piece.