Movable Screw Holder for Vehicle Tolerance-Compensating Assembly
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Solution Overview
Problem
Existing automotive fastening systems require tolerance compensation due to manufacturing variations, leading to increased assembly effort and complexity, particularly in bolted connections where holes are not aligned, making them less efficient.
Innovation Solution
A motor vehicle fastening system with a screw holder movably mounted on a first component, aligned transversely to the screwing direction, using a guide sleeve to align with a screw receptacle, allowing for tolerance compensation and simplified assembly through a detachable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a bolted connection is used to attach components, then the connection strength is improved, but the assembly effort increases due to tolerance compensation requirements
Solution Approach 1:
The screw holder is designed to be movable relative to the first motor vehicle component, allowing dynamic adjustment during assembly to compensate for manufacturing tolerances. This movability enables the screw holder to self-align with the screw receptacle without requiring precise pre-alignment, thereby reducing assembly effort while maintaining connection strength.
Solution Approach 2:
The guide sleeve acts as an intermediary element between the fastening screw and the screw receptacle. It guides the screw into proper alignment with the receptacle, facilitating easy assembly while ensuring the screw maintains the necessary connection strength. The guide sleeve mediates the alignment process, eliminating the need for complex tolerance compensation procedures.
2Ease of operation
If manufacturing tolerances are reduced to improve hole alignment, then the assembly effort is reduced, but the manufacturing cost increases
Solution Approach 1:
The movable screw holder design allows the system to accommodate manufacturing tolerances dynamically during assembly. Instead of requiring high manufacturing precision for hole alignment, the screw holder can move to self-align with the screw receptacle, thereby reducing assembly effort without imposing stringent manufacturing precision requirements.
3Ease of operation
If a movable screw holder is used to compensate for tolerances, then the assembly effort is reduced, but the device complexity increases
Solution Approach 1:
The fastening device is segmented into distinct functional components: the screw holder, the guide sleeve, and the fastening screw. This segmentation allows each component to perform its specific function independently. The screw holder provides movability for tolerance compensation, the guide sleeve ensures proper alignment, and the screw provides the fastening function, thereby reducing overall device complexity through functional decomposition.
Solution Approach 2:
The guide sleeve serves as a simple intermediary component that guides the fastening screw into alignment with the screw receptacle. This straightforward mechanical guide structure adds minimal complexity while effectively enabling the tolerance compensation function of the movable screw holder, thereby maintaining ease of assembly without significantly increasing device complexity.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a motor vehicle securing system (12) comprising a first motor vehicle component (2, 3), a second motor vehicle component (1, 4), and at least one securing device (5), which is designed to releasably secure the first motor vehicle component (2, 3) to the second motor vehicle component (1, 4), wherein the at least one securing device (5) has a securing screw (6), which is screwed into a screw receiving area (8) formed in the second motor vehicle component (1, 4) in a screw-in direction (9), and a screw holder (7), which is movably mounted on the first motor vehicle component (2, 3) in a direction (10, 11) running transversely to the screw-in direction (9) and which is formed with a guide sleeve (14) that extends in the direction of the screw receiving area (8) and receives a section of the securing screw (6).