Sliding Door Fitting with Pretensioned Housing for Noise Reduction
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Solution Overview
Problem
Existing sliding door fittings with acceleration and deceleration devices experience damping forces that cause noise and material stress due to differential end position engagement with the guide rail, leading to housing movement relative to the rail.
Innovation Solution
A sliding door fitting with a carriage connected articulated to a housing, where the housing is pretensioned in one direction of rotation relative to the carriage, using a roller for defined positioning on the guide rail and adjustable activators to manage retraction forces, and optionally employing elastic elements or springs for torque generation to absorb impact loads without causing stop noises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the housing is not pretensioned relative to the carriage, then the structure is simpler and more flexible, but impact loads cause the housing to strike the guide rail producing noise and material stress
Solution Approach 1:
The patent applies beforehand cushioning by providing an articulated connection between the housing and carriage that is pretensioned in one direction of rotation. This pretensioning creates a predefined mechanical connection that absorbs impact loads before they can cause the housing to strike the guide rail, thereby cushioning against the harmful effects in advance.
2Object-affected harmful factors
If the housing is pretensioned in one direction of rotation relative to the carriage, then the housing remains stationary during damping forces reducing noise, but the device complexity increases due to the articulated connection mechanism
Solution Approach 1:
The patent applies dynamics by creating an articulated connection that allows controlled relative movement between the housing and carriage. The connection is pretensioned in one direction of rotation, enabling the housing to remain stationary during damping forces while still allowing necessary mechanical flexibility. This dynamic connection resolves the contradiction by providing both stability and adaptability.
3Ease of operation
If a roller is provided on the housing to rest against the guideway, then the housing can move smoothly along the guide rail with defined positioning, but the device complexity increases
Solution Approach 1:
The patent applies merging by integrating the roller directly into the housing structure, combining the functions of the housing and the rolling element. This integration allows the housing to move smoothly along the guide rail with defined positioning while minimizing additional complexity, as the roller becomes an inherent part of the housing rather than a separate component.
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 effectively absorbs impact loads and maintains a defined position on the guide rail, reducing noise and material stress by ensuring the housing remains stationary during damping forces, allowing smooth movement and controlled retraction of the sliding door.
Implementation Method 1
at least one roller on the side facing away from the carriage is provided on the housing of the retraction device, which rests with a pretension against a guideway of the running rail
Implementation Method 2
A rubber-elastic element may be provided to pretension the housing of the retraction device relative to the carriage. For pretensioning, a screw can be provided to compress the rubber-elastic element, which compresses said element and thus generates a torque between the housing and the carriage
Implementation Method 3
the retraction device has at least one, or at least two, spaced drivers which can be moved along guideways and which is or are pretensioned into a retraction position via at least one energy accumulator
Implementation Method 4
the driver or drivers is or are braked by at least one damper in the retraction direction
Data Source
AI summary
The invention relates to a sliding door fitting comprising a carriage, which is guided on a guide rail and which is connected to a housing of a retraction device in an articulated manner, wherein the retraction device has at least one, preferably two driver elements, which can be moved along guide tracks and which are spaced apart, the one or more driver elements being preloaded into a retraction position by means of at least one force accumulator, wherein the housing of the retraction device is preloaded in a direction rotation relative to the carriage.