Vehicle Door Handle Attachment with Cam-Lock Disassembly
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Solution Overview
Problem
Existing vehicle door handle assemblies are difficult to disassemble and reassemble, complicating maintenance and repair processes.
Innovation Solution
A vehicle door handle assembly with a translation-mobile part and a rotation-mobile part, featuring cam surfaces and indexing pawns, allows for easy assembly and disassembly through simple rotational movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional attachment means are used to secure the bracket and housing together, then the connection strength is improved, but the ease of assembly and disassembly deteriorates
Solution Approach 1:
The attachment unit employs a dynamic mechanism where the translation-mobile part can move between locked and unlocked positions. The rotation-mobile part enables this translation movement through cam surfaces, transforming a simple rotational input into the complex motion needed to secure or release the connection. This dynamic approach allows strong attachment during operation while enabling easy detachment when needed.
Solution Approach 2:
The mechanism utilizes cam surfaces with curved geometries to transform rotational motion into translational motion. The curved cam profiles enable the translation-mobile part to follow a predetermined path, achieving both secure locking and easy release through rotational input. The curved surfaces provide mechanical advantage and ensure reliable engagement while maintaining simplicity of operation.
2Reliability
If multiple attachment means are used to secure the bracket and housing together, then the reliability of connection is improved, but the device complexity deteriorates
Solution Approach 1:
The attachment unit merges multiple functions into a single integrated mechanism. The rotation-mobile part combines the functions of actuating the translation-mobile part, engaging/disengaging the connection, and potentially indexing between positions. This consolidation achieves reliable connection through a unified mechanism rather than multiple separate components, reducing overall complexity while maintaining security.
Solution Approach 2:
The translation-mobile part serves multiple functions: it acts as a locking element, a positioning element, and a force transmission element. By making this single component multi-functional, the design achieves reliable connection without requiring multiple specialized components, thereby reducing device complexity while maintaining connection reliability.
3Stability of the object's composition
If a secure attachment mechanism is used to hold the bracket and housing together, then the stability of connection is improved, but the ease of disassembly deteriorates
Solution Approach 1:
The attachment mechanism is designed to be dynamically controllable, transitioning between stable locked and unstable unlocked states. The rotation-mobile part enables the system to switch between these states on demand. During normal operation, the mechanism provides stable connection, but when actuated, it easily transitions to the disassembled state, facilitating maintenance and repair.
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
Facilitates quick and secure attachment and detachment of the handle assembly components, enhancing maintenance efficiency and reducing assembly complexity.
Implementation Method 1
a first cam surface configured to displace the translation-mobile part in the assembling position when the rotation-mobile part is put in rotation in a first rotational direction
Implementation Method 2
a second cam surface configured to displace the translation-mobile part in the disassembling position when the rotation-mobile part is put in rotation in a second rotational direction opposite to the first rotational direction
Data Source
AI summary
A vehicle door handle assembly includes a housing, a bracket configured to attach the housing to a vehicle panel, and an attachment unit configured to attach the bracket and the housing together. The attachment unit includes a translation-mobile part mobile between an assembling position in which the bracket and the housing are attached together and a disassembling position in which the housing and the bracket are disassembled from each other. The attachment unit also includes a rotation-mobile part rotationally supported by the bracket, cooperating with the translation-mobile part and including a first cam surface configured to displace the translation-mobile part in the assembling position when the rotation-mobile part is put in rotation in a first rotational direction, and a second cam surface configured to displace the translation-mobile part in the disassembling position when the rotation-mobile part is put in rotation in a second rotational direction opposite to the first rotational direction.