Claw-type gearshift and method of shifting a claw-type gearshift

A method of shifting a claw-type gearshift having a sliding sleeve adapted to be axially displaced on a hub body, a clutch body of a speed change gear, which is adapted to move into engagement with the sliding sleeve, and a blocking ring arranged axially between the hub body and the clutch body, the blocking ring having an external toothing with blocking ring teeth and the sliding sleeve having an internal toothing with a multitude of sliding sleeve teeth, the method comprising:

• firstly, reducing a difference in speed between the clutch body and the hub body;
• secondly, applying an axial shifting force and deflecting the sliding sleeve in the axial direction toward the speed change gear to be shifted, as a result of which a friction surface of the blocking ring and a mating friction surface of the clutch body come into contact;
• switching the blocking ring over in a circumferential direction to one of two possible locking positions by the frictional connection with the clutch body, so that a further axial movement of the sliding sleeve is blocked by the external toothing of the blocking ring;
• switching the blocking ring over in the circumferential direction to a release position when a change in direction of the relative rotational speeds of the clutch body and the hub body occurs, wherein the blocking ring teeth and the sliding sleeve teeth are formed such and located opposite each other in the locking position such that when the axial shifting force is applied, the sliding sleeve cannot return the blocking ring to the release position;
• and
• engaging the internal toothing of the sliding sleeve with an external toothing of the clutch body.

A method of shifting a claw-type gearshift having a sliding sleeve adapted to be axially displaced on a hub body, a clutch body of a speed change gear, which is adapted to move into engagement with the sliding sleeve, and a blocking ring arranged axially between the hub body and the clutch body, the method comprising:

• reducing a difference in speed between the clutch body and the hub body;
• applying an axial shifting force and deflecting the sliding sleeve in the axial direction toward the speed change gear to be shifted, as a result of which a friction surface of the blocking ring and a mating friction surface of the clutch body come into contact;
• switching the blocking ring over in a circumferential direction to one of two possible locking positions by the frictional connection with the clutch body, so that a further axial movement of the sliding sleeve is blocked by an external toothing of the blocking ring;
• switching the blocking ring over in the circumferential direction to a release position when a change in direction of the relative rotational speeds of the clutch body and the hub body occurs;
• and
• engaging an internal toothing of the sliding sleeve with an external toothing of the clutch body,
• wherein the blocking ring is supported against an end face of the clutch body when the blocking ring is axially acted upon by the sliding sleeve.