Three-Roller Sliding Door Carriage for Heavy Leaf Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sliding carriages struggle to maintain stability and efficiency when supporting heavy sliding leaves, often requiring larger rollers that increase the crosspiece height and reduce the glazed surface area, while also increasing costs and compromising aesthetics.
Innovation Solution
A carriage with three rotatably mounted rollers and a cage design featuring ramps with concave curvatures and adjustable wedges, allowing for even weight distribution and a rocking movement to follow the guide rail, while also facilitating height adjustment with a long-stroke screw mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large rollers are used to support heavy leaves, then the stability and load-bearing capacity improve, but the crosspiece height increases and the glazed surface area decreases
Solution Approach 1:
The carriage is divided into two separate components: a support structure and a cage containing rollers. This segmentation allows the support to bear the heavy load while the cage with smaller rollers maintains a lower profile, thus supporting heavy leaves without increasing crosspiece height and preserving glazed surface area.
Solution Approach 2:
The cage acts as an intermediary between the support and the leaf. The support provides the necessary load-bearing capacity for heavy leaves, while the cage contains the rollers that actually contact the guide rail, enabling stable support without requiring large rollers that would increase height.
2Device complexity
If conventional carriages are used for heavy leaves, then the structure is simple, but the stability and operational precision deteriorate over time
Solution Approach 1:
By separating the support from the cage containing rollers, each component can be optimized independently. The support provides structural stability while the cage ensures precise roller positioning, together maintaining operational precision over time without excessive complexity.
Solution Approach 2:
The cage features curved longitudinal surfaces that interact with ramp surfaces on the support. This curvature design creates stable contact points and allows for self-centering during operation, improving reliability and operational precision for heavy leaves.
3Strength
If the crosspiece height is increased to accommodate larger rollers, then the load-bearing capacity improves, but the aesthetic appearance and cost worsen
Solution Approach 1:
The support and cage are segmented as separate components, allowing the support to provide necessary structural height for load-bearing while the cage with rollers maintains a lower profile. This segmentation enables heavy leaf support without increasing overall crosspiece height, preserving aesthetic appearance and reducing costs.
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 stable and efficient sliding of heavy leaves, evenly distributing weight across three rollers and enabling a rocking motion to follow rail relief, while reducing the torque required for height adjustment, thus maintaining operational precision and aesthetic appeal.
Implementation Method 1
a cage (2) which includes three rollers (3) rotatably mounted on their respective axes
Implementation Method 2
each ramp (110, 120, 42) has two rectilinear slopes (110, 120) in opposite directions which come to bear on bearing surfaces (20) with concave curvature
Data Source
Figure 1
Figure 2~2B
Figure 3
AI summary
The carriage has three rollers (3) rotatably assembled on respective axes between two side faces of a cage (2) inserted in a hollow parallelepiped support (1). The support comprises two side ramps (110, 120) provided with two rectilinear slopes supported against parallelepiped shape bearings (20) with concave curves (23, 24) to define tangency points. The bearings carry corresponding side faces (21, 22) of the cage. The tangency points are situated respectively on two sides of a circumference of the median roller and between the axes of rotation of the rollers.