Window Regulator Carrier Plate Tilted Stopper Impact Absorption
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Solution Overview
Problem
Window regulators in vehicles experience derailing of the carrier plate from the guide rail due to forces acting during contact with the stopper member, leading to potential motor damage from excessive current flow and noise issues.
Innovation Solution
A window regulator design featuring a carrier plate and stopper member with an impact absorbing body made of elastic material, where the collision surface is tilted to prevent derailing by directing forces downward toward the guide rail, and an opposing surface is parallel to the collision surface to evenly compress the impact absorbing body, reducing the likelihood of carrier plate rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the carrier plate and guide rail are fitted together with a gap to reduce sliding resistance, then sliding resistance is reduced, but the carrier plate may contact the stopper member in a tilted state causing derailing
Solution Approach 1:
The collision surface is designed with a tilt angle relative to the direction of motion, introducing a directional component to the impact force. This angular orientation redirects the force vector to have a downward component that presses the carrier plate against the guide rail, counteracting the derailing tendency caused by the gap-induced tilt during normal operation
2Manufacturing precision
If the carrier plate contacts the stopper member, then the upper end position of the window pane is regulated, but a large electric current flows causing motor damage
Solution Approach 1:
An impact absorbing body is provided between the carrier plate and stopper member to cushion the impact before it reaches the motor system. This elastic element absorbs the shock energy during position regulation, preventing the large current surge that would otherwise occur when the motor abruptly stops, thereby protecting the motor and control board from heat damage
3Object-affected harmful factors
If an impact absorbing body is provided to absorb impact during contact, then impact is absorbed, but the carrier plate may still derail due to tilted contact forces
Solution Approach 1:
The collision surface is designed with asymmetric tilt rather than being perpendicular to the motion direction. This asymmetric angular orientation creates a force component that actively pushes the carrier plate downward onto the guide rail during impact, transforming the symmetric radial impact force into an asymmetric force vector that stabilizes the carrier plate position and prevents derailing
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
Prevents derailing of the carrier plate from the guide rail, reduces noise, and increases the stiffness of the stopper member by integrating it with the drive section, thereby minimizing part count and enhancing structural integrity.
Implementation Method 1
an impact absorbing body made of an elastic material is provided in-between
Data Source
AI summary
A window regulator prevents a carrier plate from derailing from a guide rail by preventing the generation of a force which is applied when the carrier plate and a stopper member collide with each other and which lifts up the carrier plate. In the window regulator, an impact absorption body is installed in a press fitting recess of the carrier plate. The impact absorption body is made of an elastic material for absorbing an impact caused by a collision between the carrier plate and the stopper member that regulates a slide position of the carrier plate. A collision surface formed on the stopper member is tilted toward the carrier plate with respect to a plane that is perpendicular to an axis of the guide rail such that the collision surface pushes the carrier plate down toward the guide rail when it collides with the impact absorbing body.