Drawer Pull-Out Guide with Transverse Web to Reduce Tilting Moment
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Solution Overview
Problem
Existing drawer pull-out guides face issues with lateral stability and require a large installation space, especially under heavy loads, and tend to experience tilting moments due to the weight distribution of the drawer.
Innovation Solution
The center rail's transverse web protrudes under the drawer bottom support, with a crossbar positioned below the support leg, reducing the lateral effective distance of the weight and enhancing vertical rigidity, while the side bar can be longer than the crossbar with a stiffening groove for increased torsional rigidity, and a free end area supported by rolling elements for improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the center rail is positioned laterally next to the support for the drawer bottom, then lateral stability of the drawer pull-out guide is improved, but a large tilting moment is exerted on the drawer pull-out guide when the drawer bottom is heavily loaded
Solution Approach 1:
The transverse web of the center rail extends not only laterally but also vertically downward beneath the support for the drawer bottom. This three-dimensional positioning allows the center rail to provide lateral stability while reducing the lateral effective distance for weight introduction, thereby decreasing the tilting moment exerted on the drawer pull-out guide.
2Stability of the object's composition
If an asymmetrical, lengthened transverse web is used to improve lateral stability, then lateral stability is improved, but a relatively large installation space is required
Solution Approach 1:
The transverse web of the center rail is positioned strategically beneath the support for the drawer bottom, providing lateral stability precisely where needed. This localized reinforcement achieves the required stability without extending the overall dimensions of the drawer pull-out guide, thus minimizing the installation space required.
3Ease of operation
If the drawer bottom is positioned farther from the drawer pull-out guide, then easier access is provided, but the drawer bottom cannot be widened for increased storage capacity
Solution Approach 1:
By extending the transverse web vertically downward beneath the support, the invention creates vertical clearance that allows the drawer bottom to be positioned closer to the drawer pull-out guide in the horizontal plane. This enables the drawer bottom to be widened for increased storage capacity while maintaining adequate access.
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 configuration reduces tilting moments, improves vertical rigidity by evenly loading rolling elements, and allows for a wider drawer bottom with enhanced storage capacity and stability against tipping.
Implementation Method 1
the rolling elements of carriages, which are movably mounted between the cabinet rail and the middle rail and/or between the middle rail and the drawer rail
Data Source
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AI summary
Drawer arrangement comprising: - a drawer side wall (7), which is or can be connected to a drawer rail (10) of a pull-out guide (4) of the drawer, wherein the drawer side wall (7) has a bearing means (16) for bearing a drawer base (6), - a pull-out guide (4) having a basic-structure rail (9), which is to be fastened on a basic furniture structure (2), having a drawer rail (10), which is or can be connected to the drawer side wall (7), and having a central rail (11), which is mounted for displacement between the basic-structure rail (9) and the drawer rail (10), wherein the central rail (11) has a side crosspiece (30) and a transverse crosspiece (31) connected thereto, wherein the side crosspiece (30) of the central rail (11), in the mounted position, is arranged, at least in part, laterally alongside the bearing means (16) for the drawer base (6), and wherein the transverse crosspiece (31) of the central rail (11), in the mounted position, projects, at least in part, beneath the bearing means (16) for the drawer base (6).