Telescopic Rail Clamping Structure for Secure Sliding Element Fixing
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Solution Overview
Problem
Existing telescopic systems are complex to assemble, prone to sliding element displacement or detachment, and not suitable for carrying heavy loads due to structural limitations and require modifications to the profile rails for fixing the sliding elements.
Innovation Solution
A telescopic system with sliding elements connected to a clamping element via a clamping fit on the longitudinal profile of the profile rails, allowing non-displaceable fixation without additional structural modifications, enabling greater load capacity and simplified assembly by using a tongue-and-groove connection and clamping elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sliding elements are directly injected into intermediate space between hollow profiles, then the telescopic system can be assembled, but the assembly process becomes elaborate and complicated
Solution Approach 1:
The sliding element is divided into two functional parts: a sliding portion that contacts the profile rails and a clamping portion that engages with the longitudinal groove. This segmentation allows the sliding element to be assembled in a simple push-in manner while the clamping portion provides secure fixation without complex assembly procedures.
Solution Approach 2:
The clamping element acts as an intermediary component between the sliding element and the profile rail. It engages with the longitudinal groove to provide clamping fixation, thereby simplifying the overall assembly process by eliminating the need for direct complex connections between the sliding element and profile rail.
2Reliability
If sliding elements engage with grooves for holding action, then better holding action is achieved, but the sliding elements can become loose, displaced or detached
Solution Approach 1:
The clamping portion of the sliding element is designed to be elastically deformable, allowing it to dynamically adapt to the longitudinal groove. When the sliding element is inserted, the clamping portion deforms elastically to engage with the groove and then maintains continuous clamping pressure, preventing loosening, displacement, or detachment during operation.
Solution Approach 2:
The clamping portion changes its geometric parameters (cross-sectional dimensions) in response to insertion forces. During assembly, it deforms to pass through the longitudinal groove, then rebounds to engage with the groove walls, creating a secure interference fit that maintains the sliding element's position stability throughout the telescopic system's operation.
3Reliability
If transverse bolts are used to secure sliding elements, then axial displacement is prevented, but structural modifications with transverse bores are required
Solution Approach 1:
The fixation function is extracted from the profile rail structure itself and transferred to the sliding element's clamping portion. Instead of modifying the profile rail with transverse bores for bolts, the clamping portion incorporates the fixation mechanism directly, eliminating the need for structural modifications to the profile rail while maintaining secure axial fixation.
Solution Approach 2:
The sliding element's clamping portion performs the fixation function independently without requiring external fastening components like bolts or modifications to the profile rail. The clamping portion itself provides the fixation mechanism by engaging with the longitudinal groove, making the system self-sufficient and eliminating additional manufacturing steps.
4Length of moving object
If telescopic sliding elements are used, then the system can extend, but the sliding elements are heavily flexurally loaded and not suitable for heavier loads
Solution Approach 1:
The clamping portion is designed to engage with the longitudinal groove in a manner that distributes loads across multiple dimensions. The engagement provides both axial constraint and lateral support, transforming the loading conditions from purely flexural to a combination of axial, radial, and bending loads, thereby increasing the sliding element's capacity to handle heavier loads during telescopic extension.
Data Source
AI summary
A telescopic system comprising at least two profiled rails which are guided linearly on one another in the longitudinal direction, are movable relative to one another over a distance and each have a longitudinal profile with longitudinal grooves and/or longitudinal ribs wherein at least one sliding element is provided on each profiled rail, via which sliding element the at least two profiled rails bear against one another in a slidable manner, and which sliding element is arranged so as to be fastened in an axially non-displaceable manner, at least with respect to the longitudinal direction, on the longitudinal profile of the associated profiled rail. Such a telescopic system is intended to be simpler in design and able to be mounted more easily. This is achieved in that the sliding element, at least with respect to a sliding plane defined by the longitudinal direction and a first transverse direction perpendicular to the longitudinal direction, is then connected to a clamping element so as to be fixed against displacement on the profiled rail, wherein the clamping element is arranged with a clamping fit on the longitudinal profile of the profiled rail, to be precise in or on a longitudinal groove and/or on a longitudinal rib.