Automatic coupling and decoupling device for transmitting torque between engine unit and receiver unit, has contact surfaces maintained spaced apart form each other during uncoupling of engine unit and receiver unit

摘要

The device has a friction unit (3) provided with an engine unit (1). The friction unit and a coupling sleeve (4) are arranged such that the friction unit and sleeve moves axially with respect to each other. The friction unit and sleeve have contact surfaces (5,6) maintained spaced apart form each other during uncoupling of the engine unit and a receiver unit (2). The surfaces cooperate with each other during coupling of the units.