Walk behind self-propelled crawler snowplow

摘要

A walk behind self-propelled crawler snowplow includes a snowplow mechanism driven by an engine via a belt drive power transmission mechanism (109), and an overload protection device (130) associated with the belt drive power transmission mechanism for protecting the engine against overload. The overload protection device comprises a tension sensor for detecting the tension in an endless belt (103) and generating an electric overload signal to disengage an electromagnetic clutch (101) in the belt drive power transmission mechanism when a belt tension greater than a predetermined value is detected.