Window Regulator Wire-End Noise Reduction
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Solution Overview
Problem
Existing window regulators for vehicles, particularly in electric cars, generate operational noise due to the movement of wire-ends in the wire-end storage portion, leading to a complex assembly with multiple discrete parts, which increases noise and assembly time.
Innovation Solution
A window regulator design featuring a carrier plate with a wire-end storage portion having a hollow structure surrounded by a top wall and circumferential wall with ribs, where the flange portion of the wire-end is in contact with at least two ribs, reducing noise by minimizing contact area and absorbing vibrations through a U-shaped guide rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete parts are used for upper and lower wire-ends, then the window regulator can function properly, but the number of parts increases and assembly complexity increases
Solution Approach 1:
The patent combines the upper wire-end and lower wire-end into a single integrated wire-end component. This wire-end has a flange portion that contacts multiple ribs within the wire-end storage portion, eliminating the need for separate upper and lower wire-end parts while maintaining the regulatory function of the window regulator.
2Ease of manufacture
If multiple discrete parts are used, then the window regulator can be assembled, but assembly time and effort increase
Solution Approach 1:
By integrating the upper and lower wire-ends into one component with a single flange portion that interacts with multiple ribs, the patent reduces the number of assembly steps. The flange portion is inserted into the wire-end storage portion as a single unit, significantly reducing assembly time and effort compared to assembling multiple discrete parts.
3Adaptability or versatility
If the wire-end moves freely in the wire-end storage portion, then the wire-end can accommodate movement, but operational noise increases
Solution Approach 1:
The patent introduces multiple ribs at specific locations within the wire-end storage portion. These ribs create localized contact points with the flange portion of the wire-end, providing structured guidance and support. This local structural modification allows the wire-end to accommodate necessary movements while preventing free movement that causes noise, effectively reducing operational noise.
Data Source
AI summary
A window regulator has a small number of parts and a simple structure and avoids the generation of noise. An upper wire-end having a flange portion is connected to the end portion of a raising wire connected to a carrier plate. A wire-end storage portion having a hollow portion surrounded by a top wall and a circumferential wall extending downward from a rim of the top wall is formed on the carrier plate. A plurality of ribs are formed on the wire-end storage portion along an axis direction of the wire-end storage portion, while protruding from the circumferential wall to the hollow portion. The flange portion is in contact with at least two of the ribs.