Self-Locking Clamping Mechanism for Drawer Pull-Out Guide Fixing
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Solution Overview
Problem
Existing devices for fixing drawers on pullout guides face limitations in providing high holding forces, especially during impact tests, and suffer from reduced position accuracy and alignment issues.
Innovation Solution
A device with a clamping mechanism featuring a self-locking clamping element that secures a web-shaped holding part in a friction-locked manner, utilizing a rotatable clamping lever or wedge for high clamping forces, and allowing for easy installation and precise positioning through a non-positive connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a plastic catch element and base part are used for fixing the drawer, then the device is easy to manufacture, but the holding forces are limited especially in the case of heavy drawers
Solution Approach 1:
The clamping element is produced as a one-piece construction from metal material, combining high strength and rigidity properties that enable it to withstand heavy loads and provide sufficient holding forces for heavy drawers, while maintaining ease of manufacture through the one-piece construction method
Solution Approach 2:
The clamping element is designed with a segmented structure comprising a clamping lever, a contact surface, and a locking surface, allowing each segment to perform its specific function optimally while contributing to the overall high holding force capability
2Adaptability or versatility
If an elastic material piece is used to connect the holding part and counter holding part, then the device allows for tolerance compensation, but the position accuracy in the longitudinal direction is reduced
Solution Approach 1:
The clamping element automatically adjusts itself through its rotatable clamping lever mechanism, which self-regulates the clamping force and positioning based on the inserted holding part, eliminating the need for elastic material pieces and achieving both precise positioning and tolerance compensation
Solution Approach 2:
The clamping element changes its clamping parameter dynamically through rotation of the clamping lever, allowing it to adapt to different tolerance conditions while maintaining accurate longitudinal positioning through friction-locked engagement
3Device complexity
If a formfitting connection with stop elements is used, then the connection is simple, but the adjustment is discrete and not continuous
Solution Approach 1:
The invention replaces the formfitting mechanical connection with stop elements with a friction-based clamping mechanism, where the clamping element creates continuous friction contact with the holding part, enabling continuous adjustment while maintaining simple device structure
Solution Approach 2:
The clamping element is designed to be rotatable about a rotational axis, creating a dynamic friction-locked connection that allows continuous adjustment of the holding part position, replacing the static discrete positioning of formfitting connections
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 stable fixing of drawers with high holding forces, ensuring they cannot be pulled out during maximum open position, while allowing for accurate positioning and easy installation, even under loaded conditions.
Implementation Method 1
a self-locking clamping element is provided on the receptacle, by means of which the holding part is secured in a friction-locked manner against pulling out
Implementation Method 2
The clamping element can be pre-tensioned in a locked position, in particular via one or more springs and/or via a force accumulator
Data Source
AI summary
A device for fixing a push element, in particular a drawer box to a rail of a pull-out guide, the device comprising a clamping mechanism with a receptacle, into which a web-shaped holding part can be inserted, wherein a self-locking clamping element is provided at the receptacle, by which the holding part is secured in a clamping manner against being pulled out. In this way, a particularly stable fixation of the drawer box to a pull-out guide can be achieved.