Drawer Pull-Out Guide Carriage for Closed-Position Load Relief
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Solution Overview
Problem
Existing pull-out guide assemblies for drawers suffer from reduced durability and functionality due to deformation of plastic rollers under high loading, which affects the running characteristics, especially in the closed position.
Innovation Solution
Incorporating a cantilever arm with additional load-transmitting elements that are positioned to be overloaded in the closed position, allowing them to deform without affecting the actual rolling elements during drawer displacement, thereby improving load distribution and reducing deformation impact on the rolling elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If plastic rollers are used as load-transmitting elements, then the pull-out guide assembly can operate smoothly, but the rollers suffer deformation with time under high loading conditions
Solution Approach 1:
The load-transmitting elements are divided into two functional groups: rolling bodies (rollers) for smooth operation during displacement, and additional load-transmitting elements on the cantilever arm for load distribution in closed position. This segmentation allows each element to specialize in its optimal function without compromising the other.
Solution Approach 2:
Different parts of the carriage have different functional qualities: the rolling bodies are optimized for low-friction movement along the rail, while the additional load-transmitting elements on the cantilever arm are optimized for bearing high loads in the closed position. This local differentiation resolves the contradiction between smooth operation and durability.
2Strength
If the foremost load-transmitting elements are used to support the drawer in closed position, then load-bearing capacity is improved, but these elements suffer deformation under high loading
Solution Approach 1:
The load-bearing function is segmented between two groups of load-transmitting elements. The additional elements on the cantilever arm handle the high loads in closed position, while the rolling bodies handle the loads during displacement. This prevents any single element from being overloaded and deformed.
Solution Approach 2:
The cantilever arm acts as an intermediary structure that introduces additional load-transmitting elements into the system. These elements serve as a mediator to distribute and share the high loads in closed position, preventing direct overload on the primary rolling bodies.
3Strength
If all load-transmitting elements remain in engagement with the rail during displacement, then load distribution is improved, but friction and wear increase
Solution Approach 1:
The engagement state of load-transmitting elements is made dynamic rather than static. During displacement, only the rolling bodies engage with the rail, reducing friction. In closed position, the additional load-transmitting elements engage to provide load distribution. This dynamic adaptation resolves the contradiction between load distribution and friction reduction.
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 the durability and functionality of the pull-out guide assembly by distributing the load effectively, preventing premature deformation of the primary rolling elements and maintaining smooth operation.
Implementation Method 1
a bearing group with load-transmitting elements, preferably rollers, rolling bodies and/or balls
Data Source
AI summary
A pull-out guide for drawers including a first rail and at least one second rail, and at least one carriage is arranged between the two rails. The carriage includes a bearing group containing load-transmitting elements, preferably rollers, rolling bodies and/or balls. The load-transmitting elements guide the bearing group in the vertical direction and in the horizontal direction. At least one additional load-transmitting element is arranged on a bracket, at a distance from the bearing group. When the second rail is pulled out, the additional load-transmitting element can at least partially move out over the end of the first rail, such that it no longer lies on the first rail.