Vehicle Seat Pump Lever Bracket Friction Reduction
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Solution Overview
Problem
The existing seat pumping devices for vehicles experience excessive frictional forces between the lever bracket and the return spring guide, leading to operational discomfort and undesirable movement of internal components, which affects the lever's operation and occupant convenience.
Innovation Solution
The introduction of supporting portions that maintain a regular interval between the lever bracket and the housing, and between the lever bracket and the return spring guide, reducing friction and preventing horizontal movement, thereby simplifying the coupling process and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the lever bracket is in close contact with the return spring guide to maintain structural stability, then the structural stability is improved, but excessive frictional force is generated between the lever bracket and return spring guide, deteriorating operational comfort
Solution Approach 1:
A support portion is introduced as an intermediary element between the lever bracket and the housing. This support portion maintains a regular interval (gap) between the lever bracket and the return spring guide, preventing direct contact and excessive friction while preserving structural stability. The support portion acts as a mediator that enables both stability and ease of operation simultaneously.
2Ease of operation
If multiple small embossments are provided on the clutch cam to space the lever bracket and return spring guide, then operational comfort is improved by reducing friction, but the coupling protrusions become complex and manufacturing difficulty increases
Solution Approach 1:
The invention extracts the spacing function from the clutch cam structure by removing the need for multiple small embossments. Instead, a single support portion is provided that performs the spacing function independently, simplifying the clutch cam and coupling protrusions while maintaining the benefit of reduced friction and improved operational comfort.
3Power
If the lever bracket and housing are closely coupled to transmit torque efficiently, then torque transmission efficiency is improved, but undesirable horizontal movement of internal components occurs, affecting lever operation
Solution Approach 1:
The coupling between the lever bracket and housing is segmented into multiple functional zones: torque transmission is achieved through the clutch cam and coupling protrusions, while horizontal movement prevention is achieved through the support portion maintaining a regular interval. This segmentation allows both torque transmission efficiency and component stability to be optimized simultaneously.
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 solution effectively reduces the operating force on the lever, prevents breakage, and improves operational comfort by minimizing friction and stabilizing the components, thus enhancing the overall durability and usability of the seat pumping device.
Implementation Method 1
a return spring guide 40 equipped with a return spring 41 that provides a restoring force to the lever bracket 30
Implementation Method 2
a clutch device provided therein and secured to the lever bracket 30 to transmit torque of the lever 26
Implementation Method 3
a brake device provided therein and blocking reverse input torque to maintain a height of the seat cushion 22
Data Source
AI summary
Disclosed is a seat pumping device for a vehicle. The seat pumping device includes: a housing having a through hole formed therein; a clutch cam positioned on an inside of the housing and coupled such that a coupling protrusion protruding outwardly of the housing through the through hole is turnable relative to the housing; a lever bracket positioned on an outside of an upper surface of the housing so as to face the clutch cam with the housing interposed therebetween, the lever bracket being coupled to the coupling protrusion of the clutch cam to be turned integrally with the clutch cam; and a supporting portion protruding from one of the upper surface of the housing and a lower surface of the lever bracket toward a remaining one, the upper surface of the housing and the lower surface of the lever bracket facing each other, the supporting portion supporting the lever bracket and the housing so as to be spaced apart from each other at a regular interval.