Movable Frog Locking Bearing Guide Pin Integration
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Solution Overview
Problem
Current point adjustment devices with movable frogs face issues with frog point twisting, leading to improper locking on the locking rail, which is difficult to prevent especially when the device is installed in a sleeper compartment, as existing anti-twist protection solutions are limited in such configurations.
Innovation Solution
A point adjustment device with a movable frog featuring crossing frog plates, locking bearings with pivotable pawls, a slide rod for locking, and pins that guide under the auxiliary rail or an inlet plate to prevent lifting and ensure vertical alignment, enhancing stability and eliminating the need for height-adjustable blocks and stop plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If height-adjustable blocks and stop plates are used for anti-twist protection, then frog point twisting is prevented, but the device complexity increases and the solution is limited to hollow sleeper systems
Solution Approach 1:
The anti-twist protection function is merged into the locking bearing itself through the integrated guide pins. The guide pins are directly formed on the locking bearing, eliminating the need for separate height-adjustable blocks and stop plates. This integration maintains anti-twist protection while reducing overall device complexity.
Solution Approach 2:
The locking bearing performs dual functions: it provides the locking mechanism through the pawl and simultaneously provides anti-twist protection through its integrated guide pins. The guide pins automatically guide the locking bearing under the auxiliary rail foot during the locking process, eliminating the need for external adjustment components.
2Adaptability or versatility
If the point adjustment device is installed in a sleeper compartment, then space is optimized, but existing anti-twist protection solutions cannot be implemented
Solution Approach 1:
The locking bearing with integrated guide pins provides a universal solution that works in both hollow sleeper systems and sleeper compartments. The guide pins are self-contained within the locking bearing, eliminating the need for external stop plates that require hollow sleeper structures. This makes the device adaptable to multiple installation scenarios while maintaining reliable anti-twist protection.
3Device complexity
If the locking bearing is allowed to lift in the end position, then the structure is simpler, but the frog point twisting cannot be prevented
Solution Approach 1:
The guide pins act as intermediaries between the locking bearing and the auxiliary rail foot. During the locking process, the guide pins are guided under the auxiliary rail foot, which prevents the locking bearing from lifting in the end position. This intermediary mechanism ensures vertical alignment without requiring complex external structures.
Data Source
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AI summary
The present invention is based on the objective of providing a switch adjustment device with a movable frog in which unintentional rotation of the frog point can be reliably prevented. This objective is achieved according to the invention by a switch adjustment device (36) with a movable frog (16), comprising: a) the frog (16) to which locking plates (26) extending towards both auxiliary rails (38) are attached; b) two locking bearings (32) which engage the locking plates (26) on the side facing away from the frog (16) and in which a locking pawl (10) is pivotably held in each; c) a sliding rod (12) which moves the locking pawls (10) and locks them in their respective end bearings in a locking carrier (4) attached to the respective rail foot (18) of the auxiliary rail (38);and d) at least one pin (34) molded onto the locking bearing (32), which is designed such that the locking bearing (32) can be guided under the foot (18) of the auxiliary rail (38) or under a guide plate (40) attached to the foot (18) of the auxiliary rail (38) by means of an adjustment operation on the locking side of the locking pawl (10). In this way, lifting of the locking plate is reliably prevented because the locking bearing, to which the locking plate is attached directly or via an intermediate piece, is guided with the molded pin under the foot of the auxiliary rail or under the guide plate attached to the foot of the auxiliary rail. Thus, the locking bearing and therefore also the locking plate cannot break upwards in the end position of the adjustment of the frog, i.e., when this frog position is locked, thereby ensuring a vertical alignment of the frog point and allowing this setting to be securely locked.