Pull-Out Guide Stop Structure for Precise End Positioning
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Solution Overview
Problem
Existing pull-out guides for displaceable arrangements lack simplicity and convenience in fixing end positions, often resulting in complex designs and potential misalignment issues due to obstacles during movement.
Innovation Solution
A pull-out guide with a stop device that includes stop elements on guide rails and rolling element cages, allowing for easy attachment and detachment, featuring multi-stage deformation resistances and elastic stop elements to prevent undesired movement and ensure precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing pull-out guides are used without a stop device, then the guide rails can move freely along the pull-out direction, but the guide rails cannot be reliably fixed in end positions and may experience misalignment or cage wandering
Solution Approach 1:
The stop device is segmented into multiple stop elements that can be independently arranged on different guide rails or rolling element cages. This segmentation allows the stop function to be distributed across multiple locations, providing reliable positioning without requiring a single complex stopping mechanism.
Solution Approach 2:
The stop elements are designed to be elastically deformable and capable of self-adjustment. When the guide rail or rolling element cage contacts the stop element, the elastic deformation automatically absorbs impact energy and maintains contact, providing self-regulating positioning without additional control mechanisms.
2Manufacturing precision
If stop elements are made rigid to prevent misalignment, then positioning precision is improved, but the stop device becomes more complex and harder to assemble
Solution Approach 1:
The stop elements change their physical parameters dynamically - they are soft and deformable during assembly to facilitate easy installation, then maintain sufficient rigidity during operation to prevent misalignment. The elastic modulus and deformation characteristics are optimized to provide both assembly ease and positioning precision.
Solution Approach 2:
The elastic stop elements provide beforehand cushioning by being pre-designed to deform under load. This cushioning effect protects the rigid components from impact during assembly and operation, allowing simpler assembly procedures while maintaining precise positioning through the controlled elastic deformation.
3Reliability
If multiple stop elements are added to prevent cage wandering, then reliability is improved, but the device complexity and cost increase
Solution Approach 1:
The stop elements are designed with multi-functionality, serving both as positioning stops and as protective cushions. The same elastic elements that prevent cage wandering also absorb impact energy and protect guide rails, reducing the need for separate protective components and offsetting the complexity increase.
Solution Approach 2:
The stop elements are designed to be homogeneous in their material properties and functional characteristics across all locations. This homogeneity allows for standardized manufacturing and assembly procedures, reducing the complexity burden of having multiple stop elements. All stop elements behave predictably and can be installed using the same methods.
4Ease of operation
If elastic stop elements are used to reduce operational forces, then ease of operation is improved, but the positioning precision may be compromised
Solution Approach 1:
The elastic stop elements are designed with optimized parameters where the stiffness and deformation characteristics are tuned to provide sufficient rigidity for accurate positioning while maintaining enough elasticity to reduce impact forces during operation. The material selection and geometric design balance these competing requirements.
Solution Approach 2:
The elastic stop elements provide beforehand cushioning that reduces operational forces by absorbing impact energy during normal operation. The pre-designed elastic deformation paths ensure that this cushioning effect does not compromise positioning accuracy, as the deformation occurs in controlled directions that maintain alignment.
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 enables simple and effective fixing of the pull-out guide in end positions, preventing misalignment and cage wandering, thus enhancing usability and reducing operational forces, while maintaining cost-effectiveness and optimized stop behavior.
Implementation Method 1
The stop device comprises one or more elastically designed and/or flexibly arranged stop elements
Implementation Method 2
The pull-out guide comprises a plurality of guide rails which can be moved relative to one another in a pull-out direction by means of rolling elements
Data Source
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AI summary
In order to create a drawer guide for the slidable arrangement of a drawer that can be pulled out of a cabinet, which is simple in design and can be conveniently fixed in one or more end positions, it is proposed that the drawer guide comprise two or more guide rails which are arranged slidably to one another along a drawer direction by means of rolling elements, wherein the guide rails of the drawer guide can be stopped in one or more end positions by means of a stop device of the drawer guide.