Pawl lock with closure clamp screw

US8708287B2 · kind B2 · utility

Assignee

• SIEMENS SCHWEIZ AG · CH

Inventors

• Walter Ackeret · Seuzach, CH
• Rudolf Herrmann · Augsburg, DE
• Andreas Infanger · Rafz, CH

Key dates

• Filing date: Jan 18, 2012
• Grant date: Apr 29, 2014
• Expiry date: Jun 9, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B61L5/10
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A lock bearing for a points setting arrangement has a lock bearing screw penetrating a foot of a setting tongue and an anti-rotation ring enclosing the head of the lock bearing screw in an annular, force-fitted manner with an outer toothing and a safety plate matching the outer toothing. It therefore is possible to tighten the lock bearing screw within a small torque range and only to have to align the lock bearing screw with the pitch of the outer toothing. Therefore if, for example, the outer toothing has 36 teeth, the lock bearing screw only need to be aligned within a range of maximum 10°. The anti-rotation ring functions like an adapter for the toothing mass and contributes to the fact that no modifications need to be carried out on the remaining construction of the lock bearing, which is advantageous as regards safety and approval considerations.