Vehicle Seat Pump Cam Supporter for Balance and Braking
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Solution Overview
Problem
The existing pumping devices for vehicle seats face issues with internal component imbalance, leading to increased operating force and durability degradation, as well as noise, due to tilting of the clutch cam under reverse input power.
Innovation Solution
A pumping device configuration that includes a cam supporter between the clutch device and the brake device, which restricts the movement of the clutch cam and guides the brake rollers, maintaining balance and ensuring precise braking operations by using a cam supporter with protrusions that correspond to the brake rollers and clutch cam, thereby preventing axial movement and tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clutch cam is allowed to rotate freely under reverse input power, then the brake device can function, but internal component imbalance occurs causing increased operating force and durability degradation
Solution Approach 1:
The cam supporter acts as an intermediary component between the clutch cam and brake device. It provides a support surface that mediates the interaction between these components, preventing the clutch cam from tilting under reverse input power while still allowing the brake device to function properly.
Solution Approach 2:
The tilting and imbalance problem of the clutch cam is extracted and addressed separately by introducing the cam supporter. The cam supporter specifically addresses the clutch cam stability issue without interfering with the normal braking function, separating the stability concern from the braking mechanism.
2Stability of the object's composition
If the clutch cam is restricted to prevent tilting, then component balance is maintained, but the brake device may not function properly
Solution Approach 1:
The cam supporter serves as a mediator that allows both the clutch cam stability and brake device functionality to coexist. It provides selective support - preventing tilting in certain directions while allowing necessary movement for braking operation.
Solution Approach 2:
The cam supporter provides localized support at specific contact points with the clutch cam. Rather than completely restricting movement, it provides support only where needed to prevent tilting, while allowing other movements necessary for brake operation to continue.
3Stability of the object's composition
If a cam supporter is added to support the clutch cam, then component balance is improved, but device complexity increases
Solution Approach 1:
The cam supporter is designed as a simple, segmented component with a flat support surface rather than a complex mechanism. This segmentation allows it to perform the stabilization function with minimal structural complexity, integrating easily into the existing clutch and brake assembly.
4Reliability
If the cam supporter restricts clutch cam movement, then operating performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The cam supporter's flat support surface is designed to self-align with the clutch cam during assembly. The geometry of the support surface and cam interface is configured so that proper alignment is achieved through the natural fit of components, reducing the need for high-precision manual adjustment or specialized manufacturing tolerances.
Data Source
AI summary
A pumping device for a seat of a vehicle, in which a cam supporter supports a clutch cam to be balanced in the pumping device, thereby minimizing movement of the clutch cam due to an external force reversely input, and the cam supporter guides movements of brake rollers, thereby causing braking operation by the brake rollers to be precisely performed and improving operating performance.