Resilient Pull-Out Shelf Mounting for Refrigeration Rails
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Solution Overview
Problem
The existing telescopic extensions face significant inertial forces when the carrier is braked, leading to potential damage due to the impact of the pin on the buffer, especially when heavily loaded or used carelessly.
Innovation Solution
Attaching the carrier to the first rail in a resilient manner, with a latching projection that has an elastically yielding flank, which reduces the inertial forces by deforming upon reaching the stop, thereby minimizing delays and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the carrier is rigidly attached to the rail, then the connection is strong and stable, but the inertial forces during braking cause considerable strain and potential damage to the carrier and rail
Solution Approach 1:
The patent applies beforehand cushioning by introducing a resilient element (spring or elastomer) between the carrier and the rail before the braking event occurs. This cushioning element is pre-installed in the attachment mechanism, so when braking happens and inertial forces arise, the resilient element is already in place to absorb and dampen the shock, preventing damage to the carrier and rail connection.
2Reliability
If a rubber buffer stop is used between the rails to limit movement freedom, then the rails are protected from being pulled completely apart, but the impact forces when the stop is reached put considerable strain on the carrier-rail connection
Solution Approach 1:
The patent applies the intermediary principle by introducing a resilient element as a mediator between the carrier and the rail. This intermediary element (spring or elastomer) sits in the attachment connection and acts as a buffer that absorbs impact forces during braking, reducing the strain transmitted to the carrier-rail connection while still maintaining the stopping function.
3Strength
If the carrier is attached rigidly to accommodate heavy loads, then load-bearing capacity is maximized, but thermal expansion differences between metal rails and glass/plastic shelves cause strong stresses and premature material fatigue
Solution Approach 1:
The patent applies parameter changes by modifying the mechanical properties of the attachment connection through the resilient element. The spring or elastomer changes the stiffness parameter of the connection, allowing it to be rigid enough to bear heavy loads yet flexible enough to accommodate thermal expansion differences between the metal rails and glass or plastic shelves, preventing excessive stresses and material fatigue.
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 solution reduces the risk of damage to the carrier and rail by absorbing inertial forces, ensuring smooth operation even under vigorous use and accommodating thermal expansion differences between metal rails and glass or plastic shelves.
Implementation Method 1
the first rail carries a latching projection with at least one flank which is elastically yielding in the direction of movement of the rails. When the rail reaches its stop, this flank can be elastically deformed by the inertial force of the wearer and the objects carried by him
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The invention relates to a telescopic pull-out shelf (13) with at least two runners which are movably guided one on the other so that they can be displaced relative each other in the longitudinal direction. The invention is characterized in that a support (11) on the first runner (14) is resiliently fastened in the direction of movement of the runners.