Vehicle Door Handle Assembly With Cam-Lever Tolerance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle door handle arrangements are prone to manufacturing tolerances and wear, leading to uncomfortable and inefficient operation.
Innovation Solution
A handle arrangement with a support element, handle element, and an adjustment mechanism comprising an extension cam and extension lever, allowing the handle to move between non-use and use positions with a self-locking mechanism and minimal play, using a combination of extension cam and extension lever for a comfortable, load-efficient, and less wear-prone extension movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional door handle arrangement is used, then the structure is simple, but the handle arrangement is sensitive to manufacturing tolerances and wear, leading to uncomfortable operation
Solution Approach 1:
The adjustment mechanism is segmented into distinct functional components: extension cam for lateral movement, elevation cam for vertical positioning, and extension lever for force transmission. Each component handles a specific aspect of handle positioning, making the system more tolerant of individual component tolerances while maintaining overall reliability
Solution Approach 2:
The mechanism uses movable cams with specific contours that dynamically adjust the handle position during operation. The extension cam rotates to provide extension movement, while the elevation cam rotates to provide elevating movement, creating a dynamic adaptation to manufacturing variations and wear through continuous motion control
2Ease of operation
If a conventional handle extension mechanism is used, then the structure is compact, but the extension movement is wear-prone and requires frequent maintenance
Solution Approach 1:
The patent replaces traditional sliding or hinged mechanical connections with a cam-based mechanism. The extension cam and elevation cam use rolling contact and controlled pivoting instead of sliding friction, significantly reducing wear and maintenance requirements while improving the smoothness and comfort of handle extension
Solution Approach 2:
The cam surfaces are designed with specific curved contours that optimize the motion path and contact points. The cylindrical or circular arc contours of the extension cam and the curved profile of the elevation cam create smooth, controlled movement that reduces stress concentrations and minimizes wear on contacting surfaces
3Manufacturing precision
If the handle element is directly coupled to the support element, then the mechanism is simple, but the handle element cannot be securely positioned in the use position
Solution Approach 1:
The extension lever acts as an intermediary between the extension cam and the handle element, providing precise positioning control. The lever translates the cam's rotational motion into accurate linear extension movement, ensuring the handle element reaches the correct use position while adding only moderate structural complexity
Solution Approach 2:
The mechanism changes the motion parameters through the cam profiles, converting rotational motion into precisely controlled linear extension and vertical elevation. The specific cam contours are designed to achieve accurate positioning by controlling the displacement, velocity, and acceleration parameters during handle extension
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
The solution provides a robust and low-maintenance handle arrangement that is insensitive to manufacturing tolerances, ensuring a comfortable and secure handle extension with reduced wear, requiring minimal maintenance.
Implementation Method 1
the adjustment mechanism comprises at least one extension cam and an extension lever, and the handle element is designed as a handle lever, in particular a pivotally mounted one, which on the one hand is in engagement with the extension cam and on the other hand is pivotally connected to the extension lever
Implementation Method 2
the adjustment mechanism comprises at least one extension cam and an extension lever, and the handle element is designed as a handle lever, in particular a pivotally mounted one, which on the one hand is in engagement with the extension cam and on the other hand is pivotally connected to the extension lever
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a handle arrangement (1) comprising at least: - a support element (4), - a handle element (2) which is movably arranged on the support element (4) between a non-use position (100) and a use position (102), and - an adjustment mechanism (6) which couples the handle element (2) and the support element (4) together, wherein the adjustment mechanism (6) is configured to move the handle element (2) between the non-use position (100) and the use position (102) by actuation, wherein the adjustment mechanism (6) comprises at least a setting cam (6.1) and a setting lever (6.2) and the handle element (2) is configured as a handle lever (6.3) which on the one hand engages with the setting cam (6.1) and on the other hand is articulated to the setting lever (6.2) and is movable between the non-use position (100) and the use position (102) by means of this.