Drawer Rail Rack Mounting That Prevents Pinion Jamming
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Solution Overview
Problem
Existing rail systems for drawers often experience jamming due to the positive locking connection between the rack and pinion, leading to unwanted blocking of the drawer during normal use.
Innovation Solution
The rack is designed to be pivotable or bendable about a notional axis extending in the extension direction of the rail, allowing limited heightwise movement to prevent twisting between the pinion and rack, and can be elastically preloaded to maintain a positively locking connection while yielding in jamming situations, using a resiliently yielding portion or a film hinge for flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positively locking connection between rack and pinion is used, then the connection security is improved, but the risk of jamming increases
Solution Approach 1:
The rack is made dynamically adjustable in its position relative to the pinion through a resilient mounting arrangement. This allows the rack to move slightly to accommodate tolerances and prevent jamming while maintaining positive locking engagement during normal operation.
Solution Approach 2:
The mounting arrangement changes the positional parameter of the rack relative to the pinion, allowing adjustment within a tolerance range. This parameter change enables the system to adapt to manufacturing variations and operational conditions without jamming.
2Stability of the object's composition
If the rack is rigidly fixed to the rail, then the structural stability is improved, but the running properties deteriorate
Solution Approach 1:
Instead of rigid fixation, the rack is mounted with controlled mobility through resilient elements. This dynamic mounting allows the rack to yield slightly during operation, improving running properties while maintaining sufficient structural stability through the preloading mechanism.
Solution Approach 2:
The resilient mounting arrangement acts as a cushioning element that absorbs shocks and tolerances before they can cause jamming or operational problems. This beforehand cushioning protects the rigid structural components from operational stresses.
3Object-affected harmful factors
If the rack is mounted with heightwise mobility, then the jamming resistance is improved, but the connection precision may worsen
Solution Approach 1:
The resilient mounting allows controlled parameter changes in the rack's position, accommodating manufacturing tolerances and operational variations. This flexibility maintains connection precision within acceptable ranges while preventing jamming.
Solution Approach 2:
The resilient mounting arrangement provides continuous feedback through elastic deformation, allowing the rack to self-adjust its position to maintain optimal engagement with the pinion while resisting jamming forces.
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 design effectively prevents jamming and ensures smooth operation of the drawer by allowing the rack to yield in response to jamming, maintaining a secure connection and preventing lateral tilting, thus enhancing the running properties of the rail system.
Implementation Method 1
The rack can therefore be elastically preloaded towards the pinion, either by inherent elasticity or also by the force of a spring.
Implementation Method 2
The resiliently yielding region is such that, after vertical deflection, the rack is automatically moved back into the original starting position again.
Data Source
AI summary
The invention relates to a rail system for drawers, comprising a body rail to be fastened to a furniture body and at least one drawer rail that can be moved relative to the body rail, and comprising at least one gear rack arranged on a rail of the rail system, wherein the gear rack can be pivoted or bent relative to the rail to which said gear rack is fastened about an imaginary axis (A) extending in the pull-out direction of the rail and thus is mounted such that the gear rack can be moved vertically to a limited extent.