Motor Vehicle Door Lock Damping Element Noise Reduction
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Solution Overview
Problem
Existing motor vehicle door lock closing/opening devices, while improving ease of use, often generate noise due to structural resonance, which negatively impacts customer satisfaction.
Innovation Solution
Incorporating an acoustic damping element, preferably made of elastomeric materials, within the closing/opening device to decouple the motor's noise and vibrations from the door lock mechanism, effectively suppressing resonant frequencies and reducing noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motorized closing/opening device is used to improve ease of use, then operating comfort is improved, but noise from the motor is transmitted to the door through structure-borne noise
Solution Approach 1:
The patent introduces a damping element as an intermediary component between the motor and the locking mechanism. This damping element acts as a mediator that transmits the necessary mechanical force while filtering out harmful vibrations and noise, allowing the motorized function to be maintained without the negative acoustic effects
Solution Approach 2:
The patent converts the harmful vibrations and noise generated by the motor into beneficial damping effects. By strategically placing damping elements in the force transmission path, the previously harmful vibrational energy is dissipated as heat through material damping, transforming a harmful byproduct into a useful noise-reduction feature
2Reliability
If the lock case is screwed directly to the motor vehicle door to ensure secure mounting, then reliability is improved, but noise is amplified by resonances in the door cavities
Solution Approach 1:
The damping element serves as an intermediary between the locking mechanism and the door structure, maintaining the secure mechanical connection while introducing vibration-damping properties that prevent resonance amplification in the door cavities
Solution Approach 2:
The patent changes the mechanical parameters of the connection between the lock case and the door by introducing damping materials that alter the stiffness and damping characteristics of the mounting system, thereby changing the resonant frequencies and reducing noise amplification
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 motor vehicle door lock with enhanced acoustic performance and maintained operating comfort by effectively dampening motor-generated frequencies, resulting in a low-noise operation.
Implementation Method 1
it is provided in a generic motor vehicle door lock that the closing/opening device has an interposed (acoustic) damping element
Implementation Method 2
the said damping element or the elastomer used at this point is or is designed in such a way that frequencies generated in particular by the motor or electric motor already mentioned are effectively suppressed
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a motor vehicle door lock, comprising a locking mechanism (1, 2) and a closing/opening device (3 to 7) having a drive (3, 4, 5), wherein the closing/opening device (3 to 7) acts on the locking mechanism (1, 2) and the closing/opening device (3 to 7) comprises an interposed damping element (16).