Eccentric Gear Stopper Plate Structure for Load Dispersion
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Solution Overview
Problem
The existing gear devices for seat lifters face durability issues due to increased load on the housing and stopper plate, which restricts rotational movement while allowing linear movement, leading to potential mechanical failure.
Innovation Solution
The gear device incorporates a stopper plate with an arm extending in the linear movement direction, accommodated in a housing with an accommodation pit that disperses the rotational force through a projected wall and branching portion, enhancing the durability of both the stopper plate and housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the housing restricts rotational movement of the stopper plate, then rotational movement is restricted, but the load on the housing and stopper plate increases
Solution Approach 1:
The stopper plate is divided into a main body and multiple arms that extend into accommodation pits. This segmentation allows the rotational restriction function to be distributed across multiple contact points (accommodation pits) rather than concentrated on the housing, reducing the load on any single component while maintaining rotational stability.
Solution Approach 2:
The arms of the stopper plate extend in the linear movement direction (adding a dimensional element) and are accommodated in pits within the housing. This dimensional extension creates additional contact surfaces and distribution points for rotational forces, dispersing the load across multiple locations rather than concentrating it on the housing body.
2Stability of the object's composition
If the stopper plate restricts rotational movement of the second gear, then rotational movement is restricted, but the durability decreases due to increased load
Solution Approach 1:
The stopper plate is segmented into a main body and multiple arms that engage with accommodation pits. This segmentation distributes the rotational restriction function across multiple engagement points, reducing the mechanical stress and wear on any single component, thereby improving the durability and reliability of both the stopper plate and housing.
Solution Approach 2:
The arms extend in the linear movement direction and are received in accommodation pits, creating a three-dimensional engagement structure. This dimensional extension distributes rotational forces across multiple locations and orientations, reducing concentrated stress and improving the overall durability of the rotational restriction mechanism.
Data Source
AI summary
A gear device includes a first gear, a second gear, and a third gear, a stopper plate, and a housing. The second gear is offset eccentrically when the first gear is rotated. The third gear is rotated at a slower speed than the first gear when the second gear is offset eccentrically. The stopper plate is engaged with the second gear thereby restricting rotational movement of the second gear while permitting linear movement of the second gear. The housing accommodates the stopper plate in a state restricting rotational movement of the stopper plate while permitting linear movement of the stopper plate. The stopper plate includes an arm extending in a linear movement direction of the stopper plate. The housing includes an accommodation pit accommodating the arm. The arm includes a branching portion. The accommodation pit includes a projected wall arranged in the branching portion.