With the term "nasal suspension" or "tramway suspension" we refer to a method of suspending the electric traction motors typical of the trams, also used on old-style railway locomotives.

With this method, the engine is not suspended in the carriage or frame of the vehicle but is tied directly to the room thus contributing to the so-called rigid mass. Its weight is all or part of the room itself. The motor leans on one side on the room, using two oil-bearing bearings, while on the other side is secured to a crossbar of the carriage by means of a projection called "nose" (hence the name of the suspension for the nose), with the interposition of two or more springs that elastically support the engine's weight and counteract the driving torque reaction.

The motion of the motion is direct and is usually carried out by means of gears; the pinion is clamped at the end of the crankshaft and grommets on a toothed wheel fixed to the assembled chamber. With this type of suspension the engine weight remains elastically suspended only by half; the other half lies directly on the room, generating, during the march, considerable stress on both the engine and the armament due to the inertia of the system.

This type of transmission is therefore not suitable for high speeds for which you prefer cable drive or cable drive and dancing ring. Bibliografiamodifica wikitesto

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