Sliding Door Roller Fitting with Tilting Lever and Curved Arm

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Solution Overview

Problem

Existing sliding door roller fittings have complex constructions with many movable parts, leading to complications and a high risk of the sliding door being lowered or lifted during the setting-out movement, which increases the force required for transverse movement, especially with heavy doors.

Innovation Solution

A sliding door roller fitting with a tilting lever having a long and short arm, where the short arm is angled and curved, allowing it to roll on a horizontal bearing surface, preventing lowering or lifting, and featuring a bearing body with driving stops and an axle pin for synchronized movement, reducing the force needed for transverse movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a complex construction with many movable parts is used, then the sliding door can be supported, but the risk of lowering or lifting during setting-out movement increases and more force is required

Engineering Contradiction:

Improveprevention of lowering or liftingVSAvoidnumber of movable parts

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the running roller, tilting lever, and bearing body into an integrated assembly where the running roller is mounted on the tilting lever which pivots within the bearing body. This merging of functions into a single fitted unit reduces the number of separate movable parts while maintaining reliability through the interconnected design that prevents lowering or lifting during setting-out movement.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The tilting lever is designed to pivot dynamically between different positions during operation. The lever tilts forward during setting-out movement and returns to its initial position during sliding movement, providing adaptive motion control that prevents lowering or lifting while reducing friction and required force through natural motion optimization.

Inventive Principle:

Principle #15Dynamics

2Reliability

If the tilting lever has a curved outer side that rolls on the bearing surface, then lowering or lifting is prevented, but the manufacturing precision requirements increase

Engineering Contradiction:

Improveprevention of lowering or liftingVSAvoidcurved surface rolling contact

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The tilting lever features a curved outer side on its short arm that rolls along a horizontal bearing surface during tilting motion. This curved geometry ensures that the contact point remains at a constant height, preventing lowering or lifting of the sliding door during setting-out movement. The curvature is designed to work with the bearing body's horizontal surface to maintain stable vertical positioning.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Ease of operation

If the running roller projects beyond the long arm, then rolling along the running rail is improved, but the device complexity increases

Engineering Contradiction:

Improverolling along running railVSAvoidprojection of running roller

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The running roller is positioned to project beyond the long arm of the tilting lever in the direction perpendicular to the lever arm, creating a configuration where the roller extends outward to contact the running rail. This dimensional arrangement allows the roller to engage the rail surface effectively for smooth rolling motion while the projection distance is optimized to balance ease of operation with structural compactness.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 simplifies the construction by minimizing parts, reduces the force required to move heavy sliding doors, and ensures smooth, parallel movement without lowering or lifting, enhancing the efficiency and ease of operation.

Implementation Method 1

a freely rotatably mounted running roller which, on the roller side opposite the short arm, projects beyond the long arm in order to roll along a running rail

Methodology Applied

Scientific EffectRolling: Roller

Implementation Method 2

the short arm of the tilting lever bears by its curved outer side against the bearing surface and rolls thereon during tilting of the tilting lever

Methodology Applied

Scientific EffectRolling contact: Roller

Data Source

PatentUS11965368B2Sliding door roller fitting and associated sliding door arrangement

Publication Date: 2024.04.23 HAEFELE SE & CO KG

AI summary

A sliding door roller fitting includes a tilting lever having a long and short arm angled thereto. The long arm has a freely rotatably mounted running roller which projects beyond the long arm to roll along a running rail. The short arm has an outwardly curved outer side facing away from the running roller. The tilting lever is held on a sliding door-side bearing body and is tiltable between two end positions about a tilting axis parallel to a running roller tangent. The bearing body has at least one planar bearing surface which extends horizontally in the setting-out direction in the mounting position of the bearing body. The short arm of the tilting lever bears by its curved outer side against the bearing surface and rolls thereon during tilting of the tilting lever. The bearing body has two driving stops between which the tilting lever is arranged.