Handleless Car Door Opening Linkage for Low-Abrasion Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing setting-open devices for motor vehicle doors are structurally complex, leading to frictional damage, increased abrasion, and space inefficiency due to the interaction between the stop collar and door leaf, particularly in limited installation spaces within the vehicle.
Innovation Solution
A lever mechanism with a short and long lever is used to apply a travel-dependent force to the actuating element, where the short lever provides high force for initial actuation and the long lever provides lower force with increased speed for the remainder of the actuation travel, utilizing a gear wheel and reduction gear mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stop collar is used to interact with the door leaf for opening, then the door can be opened effectively, but frictional damage and abrasion occur on the door leaf and stop collar
Solution Approach 1:
The patent removes the stop collar component entirely from the system. Instead of using a stop collar that contacts the door leaf, the invention uses a rod-shaped actuating element that pushes the door leaf directly through a seal opening, eliminating the source of frictional damage and abrasion
Solution Approach 2:
The patent replaces the mechanical stop collar contact system with an electric-motor drive system that acts on a rod-shaped actuating element. This substitution eliminates friction-based mechanical contact with the door leaf surface, using instead a contained pushing action through the seal opening
2Reliability
If an arcuate stop collar is used to open the door leaf, then the door opening function is achieved, but the interaction takes up a relatively large amount of space
Solution Approach 1:
The patent extracts and removes the bulky arcuate stop collar mechanism from the system. The replacement rod-shaped actuating element requires minimal space as it moves linearly through a seal opening, dramatically reducing the volume needed for the door opening interaction
Solution Approach 2:
Instead of using an external stop collar that contacts the door leaf from the outside, the invention inverts the approach by using an internal rod-shaped actuating element that pushes the door leaf from within through a seal opening, reversing the traditional interaction geometry to save space
3Reliability
If the interior of the motor vehicle door is filled with components such as side impact protection, window lifters, loudspeakers, and side airbags, then safety and functionality are improved, but the installation space for the setting-open device becomes limited
Solution Approach 1:
The patent extracts the door opening function from the crowded interior space by using a rod-shaped actuating element that pushes through a seal opening to the exterior. This eliminates the need for complex internal mechanisms like stop collars, freeing up installation space while maintaining the door opening function
Solution Approach 2:
The patent moves the door opening interaction from the internal three-dimensional space to an external linear path through the seal opening. The rod-shaped actuating element travels along a linear dimension outside the door interior, bypassing the space constraints imposed by safety components
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 design ensures a structurally simple and functionally effective application of force to open the door, minimizing damage and space usage while adapting to different door conditions, such as being frozen, with smooth operation and efficient use of installation space.
Implementation Method 1
with an electric-motor drive (1, 2, 3, 4)
Implementation Method 2
the electric-motor drive (1, 2, 3, 4) acts on the actuating element (5) with the interposition of a lever mechanism (7, 8), wherein the lever mechanism (7, 8) works on the actuating element (5) with at least a short lever (7) and a long lever (8)
Implementation Method 3
utilizing a gear wheel and reduction gear mechanism
Data Source
AI summary
The invention relates to a setting-open device for a motor vehicle door, in particular a handleless motor vehicle door, for example a handleless motor vehicle side door. For this purpose, the setting-open device is equipped with an electric-motor drive (1 to 4) and with an associated actuating element (5) for acting on a door leaf. The actuating element (5) acts on the door leaf with a travel-dependent force along the actuation travel(S) of said actuating element. The electric-motor drive (1 to 4) acts on the actuating element (5) by the interposition of a lever mechanism (7, 8), wherein the lever mechanism (7, 8) acts on the actuating element (5) by way of at least a short lever (7) and a long lever (8).