ID Transmitter Mechanical Key Bonding for Stable Shaft Attachment
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Solution Overview
Problem
Existing electric vehicle keys with mechanical key shafts secured by locking pins face instability due to manufacturing tolerances, leading to insecure attachment over time.
Innovation Solution
A design featuring a key shaft with a coding section, fastening section, and housing, where the key shaft is movably mounted within a bearing and integrally connected to it, using adhesives or soldering, with a wedge-shaped fastening section for enhanced stability, and optionally a fixing pin for additional support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a locking pin is used to secure the key shaft to the ID transmitter, then the key shaft can be mechanically secured, but the attachment becomes unstable over time due to manufacturing tolerances
Solution Approach 1:
The patent replaces the mechanical locking pin system with a material-bonded connection (adhesive bonding) between the key shaft and bearing. This substitution eliminates the problems associated with mechanical tolerance accumulation while maintaining strong attachment. The adhesive bond creates a continuous stress distribution across the bonding surface rather than concentrated forces at discrete locking points.
Solution Approach 2:
The patent employs composite construction by integrating the key shaft and bearing into a unified structure through material bonding. This creates a composite assembly where the key shaft (typically metal) and bearing (polymer or metal) are permanently joined, forming a more reliable integrated component that overcomes the limitations of separate mechanical fastening elements.
2Stability of the object's composition
If the key shaft is securely attached to the housing, then stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical securing systems (locking pins, key bearings, multiple fastening elements) with a simple material-bonded connection. This substitution dramatically reduces the number of components and assembly steps while achieving superior stability. The adhesive bonding process can be applied directly to the key shaft and bearing surfaces without requiring additional fastening mechanisms.
Solution Approach 2:
The patent merges the key shaft and bearing into a single integrated assembly through material bonding, eliminating the need for separate fastening components. This consolidation reduces the overall part count, simplifies the manufacturing process, and removes the need for complex assembly and disassembly operations while maintaining secure attachment.
3Device complexity
If traditional mechanical fastening is used, then the structure is simple, but the attachment durability is insufficient over extended periods
Solution Approach 1:
The patent substitutes mechanical fastening systems with material-bonded connections that provide superior long-term durability. The adhesive bond creates a continuous, corrosion-resistant joint that is not subject to the loosening, wear, or tolerance accumulation problems inherent in mechanical fastening systems over extended service periods.
Solution Approach 2:
The patent uses composite material bonding to create a durable, integrated structure that resists degradation over time. The material-bonded connection between the key shaft and bearing forms a unified assembly that maintains its structural integrity and attachment strength throughout the product's service life, overcoming the temporal limitations of mechanical fastening.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures a stable and durable attachment of the key shaft to the housing, maintaining integrity despite manufacturing tolerances, while being cost-effective and simple to produce.
Implementation Method 1
the key shaft is at least partially bonded to the bearing within the fastening section
Implementation Method 2
with a wedge-shaped fastening section for enhanced stability
Implementation Method 3
using adhesives or soldering
Data Source
Figure 1
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AI summary
The invention relates to an electric key (2), in particular an ID transmitter for a locking device (30) of a motor vehicle (32), with a key shaft (4) comprising a coding section (6) for transmitting coded information and a fastening section (8) for fastening the key shaft (4), a housing (10) for receiving the key shaft (4), a bearing (12) arranged within the housing (10) for receiving and movably supporting the key shaft (4), wherein the key shaft (4) is at least partially bonded to the bearing (12) within the fastening section (8).