Sliding Leaf Shifting Mechanism With Tolerance-Compensating Locking
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Solution Overview
Problem
Existing displacement devices for sliding sashes in windows or doors suffer from structural complexity, high cost, and operational issues due to torque-induced jamming and asymmetrical force application, particularly when dealing with high loads, and require precise fitting that is prone to tilting and jamming.
Innovation Solution
A displacement device with a locking mechanism that includes a guide sleeve and elastic element to compensate for dimensional deviations, allowing the locking bolt to slide freely and compensate for tolerances, ensuring secure and jam-free operation, while being compact and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a sliding leaf is equipped with both a drive unit and a counterbalance unit, then the lifting force required is reduced, but the device complexity increases
Solution Approach 1:
The shifting device is divided into functionally independent modules: a drive unit for active sliding movement and a counterbalance unit for gravitational compensation. This segmentation allows each unit to perform its specific function optimally while reducing the overall lifting force requirement, as the counterbalance unit handles the weight compensation separately from the drive unit's sliding function.
Solution Approach 2:
The counterbalance unit is integrated within the overall shifting device structure, with the counterbalance lever system nested alongside the drive unit components. The counterbalance lever can be positioned within the window frame structure, and its mechanical elements are arranged to occupy space efficiently without interfering with the drive unit's operation, thus reducing device complexity despite adding functional capability.
2Adaptability or versatility
If a counterbalance lever with variable mechanical advantage is used, then adaptability to different leaf weights is improved, but the device complexity increases
Solution Approach 1:
The counterbalance lever is designed with variable mechanical advantage through its ability to rotate about a fulcrum point, creating different lever arms for the load and effort forces. As the lever rotates during the window's movement from closed to open position, the mechanical advantage ratio changes dynamically, providing optimal force multiplication at different positions and accommodating various leaf weights without requiring multiple fixed-ratio mechanisms.
Solution Approach 2:
The variable mechanical advantage counterbalance lever serves multiple functions: it compensates for gravitational force on windows of different weights, adjusts to different opening positions, and works within the existing drive unit mechanism. This single component performs what would otherwise require multiple specialized mechanisms, thereby improving adaptability while actually reducing overall device complexity.
3Ease of manufacture
If the counterbalance lever rotates about a fulcrum in the window frame, then ease of installation is improved, but the device complexity increases
Solution Approach 1:
The counterbalance lever is designed as a separate, extractable component that rotates about a fulcrum mounted in the window frame rather than being permanently integrated into the main device structure. This allows the counterbalance unit to be independently installed, adjusted, or removed without affecting the drive unit or other components, significantly improving ease of installation and maintenance while the modular nature actually reduces overall device complexity.
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 provides a reliable, aesthetically pleasing, and cost-effective relocation device that ensures smooth operation and secure locking without jamming, with easy installation and adjustment, using a guide sleeve and elastic element to accommodate dimensional variations.
Implementation Method 1
a spring element arranged to be acted upon by the counterbalance lever in the counterbalanced state
Data Source
Figure 1
Figure 2~4
Figure 5~8
AI summary
The invention relates to a shifting device (1) for the forced shifting of a leaf (2), in particular a sliding leaf, of a window or a door (4) relative to a frame (3) of the window or the door (4) in a transverse, in particular perpendicular, direction to the main plane of the window or the door (4), comprising an actuation mechanism (5) which can be arranged on the leaf (2) and which is movably connected to an actuating rod assembly (7) of the shifting device (1) using a section in the rebate circumferential direction (6). The shifting device (1), on a control element (8), has a locking element (46) which is operatively connected on the vertical member (32) of the leaf (2) to a locking element (24) arranged on the frame (3) and which enables a closed position of the leaf (2) relative to the frame (3).