Door Drive Slide Rail Tool-Free Pin Clamping
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Solution Overview
Problem
Existing slide rail profiles for door drives require additional processing and tool-based assembly efforts due to the need for screwing fastening pieces into place, increasing installation complexity and time.
Innovation Solution
A slide rail design featuring a separately designed fixing element that automatically clamps the fastening piece's pin within the slide rail profile, eliminating the need for screws and tools, using elastically deformable inserts like O-rings or spring-elastic arms for secure, force-fitting attachment in both vertical and horizontal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fastening pieces are secured using clamping screws or threaded pins, then reliable fixation is achieved, but additional assembly effort and tool requirements increase
Solution Approach 1:
The fixing element automatically clamps the pin of the fastening piece into the slide rail profile when inserted, without requiring any additional tools or assembly steps. The elastic deformation of the fixing element creates self-locking that secures the connection reliably
Solution Approach 2:
The fixing element is designed as an elastically deformable insert that dynamically adapts to the pin during insertion. The elastic material deforms to allow insertion, then springs back to create a force-fitting connection that compensates for manufacturing tolerances
2Reliability
If screw-based fastening is used, then secure attachment is achieved, but installation time and complexity increase
Solution Approach 1:
The fixing element performs the fastening function automatically upon insertion of the pin, eliminating the need for separate screwing operations. The elastic clamping action occurs instantaneously as the components are assembled
Solution Approach 2:
The fixing element is pre-formed with elastic properties that enable it to automatically clamp the pin during insertion. The elastic deformation and clamping action are prepared in advance through the component design, requiring no additional steps during installation
3Ease of manufacture
If separate fixing elements are used, then manufacturing flexibility is improved, but component complexity increases
Solution Approach 1:
The fixing element is designed as a separate, independently manufacturable component that can be produced from elastomers or other elastic materials using different processes than the metal pin or slide rail profile. This segmentation allows each component to be optimized for its specific material properties and manufacturing requirements
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
This solution simplifies the installation process by allowing tool-free plugging of fastening pieces, reduces assembly effort, and enables precise clamping to compensate for manufacturing tolerances, enhancing installation comfort and efficiency.
Implementation Method 1
The fixing element is designed as an elastically deformable insert or as an insert piece with at least one spring-elastic clamping section
Implementation Method 2
the at least one spring-elastic clamping section of the fixing element is deflected from a rest position when the fastening piece is inserted and presses against an inner wall of the slide rail profile
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3a~3c
AI summary
The invention relates to a slide rail for a door drive, in particular a door closer, comprising a slide rail profile for a sliding element of the door drive and at least one fastening element, which has a mounting section and a pin projecting from the mounting section, in particular a cuboid pin, wherein the pin can be inserted into an end face of the slide rail profile and the slide rail profile can be fastened via the mounting section to a mounting location, in particular a wall, a ceiling, a door frame or a door leaf, wherein at least one fixing element, formed separately from the slide rail profile and the fastening element, is provided, which is held on the pin of the fastening element and can be inserted into the end face of the slide rail profile together with the pin.and wherein, when inserted into the end face of the slide rail profile, the fixing element automatically clamps the pin of the fastening piece firmly into the slide rail profile.