Closure Cap Cover Disk Protects Lifting Assembly from Dirt
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Solution Overview
Problem
Over time, deposits build up in the lifting assembly of existing closure caps for fuel tanks, increasing the operating force required to open and close the cap, leading to reduced operational reliability.
Innovation Solution
A cover disk is fixedly connected to the pressure member of the lifting assembly and is rotatable about the hub, covering the fill socket and protecting the lifting assembly from dirt, maintaining the operating force over an extended service life by sealing the intermediate space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lifting assembly is exposed to the exterior environment, then the structure is simple and easy to manufacture, but deposits build up over time increasing the operating force
Solution Approach 1:
A cover disk is introduced as an intermediary component between the exterior environment and the lifting assembly. This cover disk rotates together with the pressure member and grip member, acting as a protective barrier that prevents dirt and deposits from reaching the lifting assembly, thereby maintaining consistent operating force over time.
Solution Approach 2:
The cover disk is positioned and configured in advance to cover the fill socket opening before the closure cap is inserted. This preliminary protective action ensures that the lifting assembly remains clean throughout the service life of the closure cap, preventing the buildup that would otherwise increase operating force.
2Object-affected harmful factors
If the cover disk projects across the rim of the fill socket, then protection against dirt is improved, but the device complexity increases
Solution Approach 1:
The cover disk is merged with the pressure member and grip member assembly, rotating together as an integrated unit. This combination eliminates the need for separate protective structures while achieving effective coverage of the fill socket rim, thus protecting against dirt ingress without significantly increasing overall device complexity.
Data Source
AI summary
A closure cap for an operating medium tank is provided with a closure device projecting into a fill socket of the operating medium tank. The closure device has a first cap element, a second cap element, and a sealing ring arranged between the first and second cap elements. A lifting assembly axially moves by an axial travel the first and second cap elements relative to each other for opening and closing the fill socket. The lifting assembly has a pressure member acting axially on one of the first and second cap elements. A grip member is provided that is rotatable about a hub and actuates the lifting assembly. A cover disk covering at least partially the fill socket relative to an exterior is connected fixedly to the pressure member of the lifting assembly. The cover disk rotates, together with the pressure member, about the hub.