Pull-Out Guide Friction Brake for Temperature-Stable Quiet Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pull-out guides face issues with temperature-dependent braking effects and rattling noises due to vibrations, particularly in vehicle center consoles, where the braking mechanism's viscosity is temperature-sensitive.
Innovation Solution
A pull-out guide with a friction element that can be displaced along a sliding surface, fixed to either rail, producing a braking effect through friction and eliminating play between the guide and running rails, featuring a U- or V-shaped section with contact surfaces and a bent-over web for secure attachment, optionally with a metallic spring to compensate for fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotation damper with brake fluid is used for braking, then the braking effect is achieved, but the braking performance becomes temperature-dependent due to viscosity changes
Solution Approach 1:
The patent replaces the hydraulic braking system (rotation damper with brake fluid) with a friction-based mechanical braking system. The friction element (16) directly contacts the sliding surface (13) to generate braking force through friction, eliminating the temperature-sensitive brake fluid and providing consistent braking performance across temperature ranges.
Solution Approach 2:
The patent changes the braking mechanism from a fluid-based system to a solid friction-based system. By using a friction element that generates braking force through direct contact friction, the system achieves temperature-independent braking performance, as friction between solid surfaces is less sensitive to temperature variations compared to fluid viscosity.
2Ease of manufacture
If the guide rail and running rail are mounted with clearance, then assembly is easy, but vibrations cause rattling noises
Solution Approach 1:
The friction element (16) is positioned to push the guide rail (11) and running rail (12) apart perpendicular to their longitudinal direction, creating a pretension force that eliminates play between the rails before operation begins. This preliminary action prevents rattling noises by ensuring continuous contact during operation.
Solution Approach 2:
The friction element applies a preliminary pretension force that pushes the rails apart, eliminating clearance and play between the guide rail and running rail before the guide is put into operation. This preliminary action ensures that no rattling noises occur during subsequent use.
3Object-generated harmful factors
If the friction element pushes the rails apart to eliminate play, then rattling is reduced, but the structure becomes more complex
Solution Approach 1:
The friction element (16) serves multiple functions simultaneously: it provides braking force through friction contact with the sliding surface, and it pushes the rails apart to eliminate play and prevent rattling. This multi-functionality reduces the need for separate components, thereby limiting the increase in structural complexity.
Solution Approach 2:
The patent combines the braking function and the play-elimination function into a single friction element. By merging these two functions into one component, the overall structural complexity is minimized while still achieving both objectives of reducing rattling and providing braking capability.
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 provides a compact, temperature-independent braking mechanism that harmonizes traverse movement, reduces rattling noises, and enhances the user experience with a high-quality guide operation, while allowing adjustable frictional force and secure attachment.
Implementation Method 1
a friction element (6) that can be displaced along a sliding surface (13) with a contact pressure. This produces a braking effect by friction when the friction element (6) is displaced along the sliding surface (13)
Implementation Method 2
The contact surface is preferably formed on an outer region of a curved or bent section, which provides a certain elasticity
Data Source
AI summary
A pull-out guide has a guide rail, a running rail, which is mounted in a displaceable manner on the guide rail, and a braking device disposed between the guide rail and the running rail for braking the movement of the running rail relative to the guide rail. The braking device has at least one friction element, which is arranged between the running rail and the guide rail and can be displaced along a sliding surface by way of a contact pressure. The pull-out guide can thus be braked with continuous forces over a long period of time.