Pull-Out Guide Coupling Mechanism for Carriage Error Correction
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Solution Overview
Problem
Carriage errors in pull-out guide systems for drawers, caused by slippage between rollers and rails, lead to incorrect positioning, which can result in drawers being left open or failing to close properly due to reduced kinetic energy from damping devices.
Innovation Solution
A coupling mechanism using a loosely guided rolling or sliding body that moves at twice the speed of the carriage, correcting errors by coupling and decoupling with the drawer's movement, and a spring device to return the rolling body to its initial position during closure, allowing for precise alignment and free movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If damping devices are added to reduce closing momentum, then the drawer closing force is reduced, but the kinetic energy becomes insufficient to correct carriage errors
Solution Approach 1:
The coupling mechanism is activated before the drawer reaches the closed position. During the opening phase, the rolling body couples the carriage to the drawer, allowing error correction to occur in advance. This preliminary coupling ensures that carriage errors are corrected before the damping devices reduce the kinetic energy, resolving the contradiction between reduced closing force and error correction reliability.
2Manufacturing precision
If the rolling body is loosely guided to move at twice the carriage speed, then carriage errors are corrected effectively, but the coupling mechanism complexity increases
Solution Approach 1:
A rolling or sliding body serves as an intermediary element between the carriage and the drawer. This intermediary couples the two components during opening movement, allowing the faster-moving drawer to correct carriage positioning errors. The rolling body simplifies the coupling mechanism by using a single intermediate component rather than complex linkages, achieving high positioning accuracy with minimal structural complexity.
3Manufacturing precision
If the rolling body is coupled to the drawer throughout the entire movement, then positioning accuracy is maintained, but the drawer movement freedom is restricted
Solution Approach 1:
The coupling between the rolling body and the drawer occurs periodically rather than continuously. The rolling body engages with the drawer during the opening phase when error correction is needed, then disengages to allow free movement. This periodic coupling maintains positioning accuracy when necessary while preserving drawer movement freedom during normal operation, resolving the contradiction between precision and ease of operation.
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
Effectively corrects carriage errors during opening and ensures proper closure without the need for complex structural components, maintaining drawer functionality and reducing wear on components.
Implementation Method 1
the rolling or sliding body, preferably under the force of gravity, is mounted so that it can move vertically essentially perpendicular to the direction of extension of the rails
Implementation Method 2
the rolling or sliding body can be acted upon within the guide by a spring device, by means of which the rolling or sliding body can be moved back into an initial position
Data Source
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AI summary
The invention relates to a pull-out guide (3) for drawers (6) comprising a first and at least one second rail (5, 7), at least one carriage (9) with load-transmitting roller bodies (10) being arranged between said two rails (5, 7). The carriage (9) can be coupled to the second rail (5), particularly when deviating from the differential course between the two rails (5, 7), characterized in that a rolling or sliding body (12) is mounted in a freely movable manner on or in the carriage (9), through which the carriage (9) can be coupled to a coupling part (8) on the second rail (5), and that a recess (14) is provided in the first rail (7) into which the rolling or sliding body (12) can be moved during opening of the drawer (6), wherein the coupling part (8) can de decoupled from the rolling or sliding body (12) and passes along the carriage (9).