Window Regulator Vibration Damping via Attenuation Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Window regulators in vehicles without outer casings for guiding wires experience abnormal noise due to wire vibrations when the door is closed, and existing solutions either require additional space or are not applicable to designs without casings.
Innovation Solution
A window regulator with a driving unit positioned below the carrier plate's lifting and lowering range, featuring a lifting wire with an attenuation member that contacts the wire to dampen vibrations, and an enclosure and retainer to ensure consistent contact and prevent the attenuation member from falling off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an outer casing is provided to guide the wire, then wire vibrations are suppressed and abnormal noise is prevented, but the device size and number of components increase
Solution Approach 1:
The invention extracts the vibration suppression function from the outer casing structure. Instead of using an outer casing to guide and dampen wire vibrations, the patent applies a dedicated attenuation member directly to the wire itself, separating the wire guidance function (performed by the wire cover) from the vibration attenuation function (performed by the attenuation member).
Solution Approach 2:
The attenuation member acts as an intermediary element between the wire and the wire cover. It provides a controlled contact interface that dampens vibrations without requiring the wire to be in constant contact with the wire cover inner surface, thus preventing abnormal noise while maintaining compact dimensions.
2Object-affected harmful factors
If a cushion is provided in a wire cover to regulate wire amplitude, then wire vibrations are attenuated, but space for the cushion is required which increases device size
Solution Approach 1:
The attenuation member is implemented as a flexible elastic body that can be disposed in a compact manner within the wire cover. Its elastic properties allow it to effectively contact and dampen wire vibrations without requiring significant space, as it can deform to accommodate the wire's movement while maintaining continuous contact.
3Device complexity
If the driving unit is positioned at the bottom end without an outer casing, then the number of components and mounting space are reduced, but wire vibrations cause abnormal noise when the door is closed
Solution Approach 1:
The attenuation member is designed to be self-contained and self-adjusting. It automatically contacts the wire when vibrations occur and dampens them without requiring external control or additional components. The elastic properties of the attenuation member allow it to self-regulate its contact pressure with the wire based on vibration amplitude.
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 effectively attenuates wire vibrations, suppressing abnormal noise generation while maintaining a compact design with fewer components and reduced space requirements.
Implementation Method 1
an attenuation member provided on the lifting wire interposed between the direction-changing member and the driving unit, the attenuation member making contact with the lifting wire to attenuate vibrations when the lifting wire vibrates
Data Source
AI summary
A window regulator which attenuates vibrations of a wire, which are generated when the door is closed while a window glass is constrained at the top end of the window, to suppress the generation of an abnormal noise. The window regulator includes a carrier plate coupled to a vehicle window glass, a driving unit which lifts and lowers the carrier plate and is disposed below a lower limit of lifting and lowering of the carrier plate, a lifting wire having one end coupled to the carrier plate and another end coupled to the driving unit via a direction-changing member, and a lowering wire having ends coupled to the carrier plate and the driving unit, respectively. An attenuation member is provided on the lifting wire interposed between the direction-changing member and the driving unit and makes contact with the lifting wire to attenuate vibrations when the lifting wire vibrates.