Roller Carriage Height Adjustment via Inclined Wedge Mechanism
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Solution Overview
Problem
The existing roller carriages for sliding doors face issues with coarse height adjustment of the counter roller, leading to either excessive stiffness or play, which compromises the counter roller's load-bearing and safety functions.
Innovation Solution
A roller carriage design featuring a counter roller mounted on a sliding block with inclined surfaces interacting with a sliding wedge, allowing for precise height adjustment through a screw mechanism, enabling smooth operation without play.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the counter roller height is adjusted using an eccentric bearing or lever, then the height can be changed, but the adjustment precision is insufficient leading to either overtension or under-tension
Solution Approach 1:
The patent changes the adjustment mechanism from coarse methods (eccentric bearing, lever) to a fine-adjustment screw mechanism that converts rotational motion into precise linear displacement, enabling continuous height parameter adjustment with high precision to eliminate both overtension and under-tension conditions
Solution Approach 2:
The patent replaces the traditional mechanical adjustment systems (eccentric bearing, lever) with a screw-based mechanical system that provides finer control. The screw mechanism transforms rotational input into precise linear movement of the sliding block, achieving superior adjustment precision compared to the previous mechanical methods
2Stability of the object's composition
If the counter roller presses too hard against the counter-track (overtension), then the roller carriage is more stable, but it runs too stiffly
Solution Approach 1:
The patent implements a dynamically adjustable counter roller height system where the sliding block can be precisely positioned along the vertical guide using the screw mechanism. This allows the system to adapt the counter roller contact force to optimal levels, maintaining stability while ensuring smooth operation by preventing excessive tension
3Ease of operation
If the counter roller is not sufficiently in contact with the counter-track (under-tension), then the roller carriage moves more freely, but it develops too much play compromising safety function
Solution Approach 1:
The patent enables dynamic adjustment of the counter roller contact through the screw mechanism and sliding block assembly. This ensures that the counter roller maintains sufficient contact with the counter-track to perform safety and load-bearing functions, while preventing excessive play that would compromise reliability
Solution Approach 2:
The patent replaces inadequate mechanical adjustment methods with a precision screw mechanism that provides continuous, fine-grained control over counter roller height. This ensures reliable contact force is maintained without developing excessive play, preserving both movement freedom and safety function
4Strength
If a lever is used to support the counter roller, then additional support is provided, but the device complexity increases
Solution Approach 1:
The patent makes the screw mechanism multi-functional: it simultaneously provides the adjustment function (moving the sliding block vertically) and the support function (the threaded engagement inherently supports the counter roller weight). This eliminates the need for separate lever-based support mechanisms while maintaining adequate support strength
Solution Approach 2:
The patent merges the adjustment function and support function into a single integrated screw mechanism. The sliding block guided by the screw serves both to position the counter roller vertically and to support its weight, consolidating multiple functions into one component to reduce 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 precise height adjustment ensures smooth guidance of the roller carriage between tracks, maintaining stability and functionality by eliminating excessive stiffness or play, thus enhancing the counter roller's load-bearing and safety performance.
Implementation Method 1
the counter roller is mounted on a sliding block having a first inclined surface, which in turn can be moved on the roller carriage in a direction perpendicular to the axes of the rollers and perpendicular to the direction of movement of the roller carriage is mounted, wherein the first inclined surface for height adjustment of the counter roller interacts with a second inclined surface, which is formed on a sliding wedge guided on the roller carriage
Implementation Method 2
An adjusting screw (30) is provided for moving the sliding wedge (16). A rotation of the adjusting screw (30) causes a displacement of the adjusting screw (30) in the direction of movement of the roller carriage (1). The displacement of the adjusting screw (30) in turn causes a displacement of the sliding wedge (16) and ultimately a displacement of the sliding block (14) and the counter roller (12) mounted on it
Implementation Method 3
The roller carriage (1) for a sliding door has at least two rollers (10) for rolling on a track of the sliding door
Data Source
Figure 1~3b
AI summary
The invention relates to a roller carriage for a sliding door, which, for movement along a direction of movement, has at least two running rollers for rolling on a track of the sliding door and at least one counter roller which is height-adjustable perpendicular to the axes of the running rollers, wherein the counter roller is mounted on a cam block having a first inclined surface, which in turn is movably mounted on the roller carriage in a direction perpendicular to the axes of the running rollers and perpendicular to the direction of movement of the roller carriage, wherein the first inclined surface for height adjustment of the counter roller interacts with a second inclined surface which is formed on a sliding wedge which is slidably guided on the roller carriage.