Dual-Bracket Lead Screw Support for Quiet Seat Operation
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Solution Overview
Problem
Existing seat operating apparatuses experience noise due to the swaying of a lead screw with a cantilevered beam support structure during rotation.
Innovation Solution
The lead screw is rotatably supported by first and second brackets, with a threaded portion coupled to a lead nut and an assembling part engaging with a worm wheel, utilizing an elastic member to prevent withdrawal and stabilize the lead screw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a cantilevered beam support structure is used for the lead screw, then the device complexity is reduced, but noise occurs due to swaying of the lead screw when it rotates
Solution Approach 1:
The support structure is segmented into multiple independent support points (first support and second support) distributed along the lead screw length. This segmentation allows each support point to independently stabilize the lead screw, preventing swaying and noise while maintaining structural simplicity.
2Adaptability or versatility
If the lead screw length is extended to improve seat adjustment range, then the adaptability is improved, but the lead screw becomes more prone to swaying and noise
Solution Approach 1:
The solution transitions from a single-point support (one-dimensional constraint) to multi-point distributed support (spatial distribution). By placing supports at different positions along the lead screw, the system adds spatial dimensionality to the constraints, effectively stabilizing longer lead screws without increasing complexity.
3Stability of the object's composition
If multiple support points are added to prevent lead screw swaying, then the stability is improved, but the device complexity increases
Solution Approach 1:
The lead screw structure itself is designed to work with the minimal necessary supports. The support members are integrated into the existing rail structure, allowing the system to achieve stability through self-contained design rather than adding external complex 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
This design effectively prevents noise from the swaying lead screw, allowing smooth operation and extended length of the lead screw, enhancing the apparatus's stability and noise reduction.
Implementation Method 1
An elastic member may be coupled to an assembling groove provided in an outer-diameter portion of the worm wheel and prevents a withdrawal of the lead screw. Two opposite ends of the elastic member may be spaced apart from each other at an interval so that the elastic member has elasticity
Data Source
AI summary
An apparatus for operating a seat includes a lead screw, in which two opposite ends of a lead screw are rotatably supported by first and second brackets in a movable rail.