Vehicle Seat Pumping Device Friction Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pumping devices for vehicle seats experience reduced operating force and increased manufacturing costs due to friction between components and complex configurations, particularly with T-shaped protrusions and additional elastomers.
Innovation Solution
A pumping device with a clutch drum and brake drum design featuring spaced clutch protrusions, support protrusions, and pressure members that reduce friction through low-friction parts and simplified shapes, minimizing component interference and number.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a T-shaped protrusion is used to operate the brake roller, then the brake function is achieved, but the operating force deteriorates due to friction between the protrusion and housing
Solution Approach 1:
The patent extracts the T-shaped protrusion from the clutch unit and eliminates it entirely. Instead, the brake drum itself is designed with brake surfaces that directly engage the brake roller, removing the intermediate protrusion structure that caused friction and operating force deterioration.
Solution Approach 2:
The patent introduces a brake drum as an intermediary component between the clutch unit and brake roller. The brake drum rotates independently and provides a smooth brake surface for the brake roller, mediating the interaction and eliminating direct contact between the clutch protrusion and housing that caused friction.
2Reliability
If a T-shaped protrusion with elastomers is provided on the clutch unit, then the brake function is achieved, but the number of components and manufacturing cost increase
Solution Approach 1:
The patent merges the brake drum function into the clutch unit assembly. The brake drum is integrated with the clutch drum structure, and the brake surfaces are formed directly on the brake drum, eliminating the need for separate elastomer components and reducing overall part count.
Solution Approach 2:
The brake drum serves multiple functions: it transmits rotational motion from the clutch unit, provides the brake surface for the brake roller, and eliminates the need for separate elastomer components. This multi-functionality reduces component count and simplifies manufacturing.
3Reliability
If the clutch unit protrusion contacts the housing intermittently, then the brake operation is achieved, but operating force is reduced and difference feeling occurs
Solution Approach 1:
The patent makes the brake drum rotation dynamic and independent. The brake drum rotates freely with the clutch unit during operation and only engages the brake roller when braking is required. This dynamic separation ensures smooth, consistent operation without intermittent contact friction.
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
The solution enhances operational performance by reducing friction, simplifying the configuration, and lowering production costs, resulting in a more efficient and cost-effective pumping device for vehicle seats.
Implementation Method 1
a plurality of brake rollers provided between the clutch protrusions and the support protrusions; and a plurality of pressure members provided by being spaced apart from each other along the outer circumferential surface of the brake drum while being arranged in contact with the support protrusions
Data Source
AI summary
A pumping device for a seat of a vehicle is proposed. In the pumping device, a plurality of pressure members is provided along an outer circumferential surface of a brake drum, and braking operation is performed through the pressure members moved when the brake drum rotates, so that friction between the brake drum and a housing can be avoided and thus deterioration of operational performance is prevented. In addition, the shape of the brake drum is simplified and the number of components is reduced, so that weight and size of the pumping device, and production cost are reduced, and fuel efficiency increases.