| 摘要 |
<p>A gear-changing mechanism comprises a shaft (3), on which is mounted a unit (4) with meshing elements (5) and a device for locking the unit (4) in relation to the shaft (3), comprising, in turn, a bushing (14), which embraces the unit (4) with the possibility of reciprocating movements along it and locking elements (15). A through-opening (19) oriented in a plane perpendicular to the axis a-a of the shaft (3) is provided in the unit (4) for location of the locking elements (15). A corresponding hollow (18) is provided on the shaft (3) for location of the locking elements (15) during locking of the unit (4) in relation to the shaft (3). A groove (17) is provided in the bushing (14) for location of the locking elements (15) when disconnecting the unit (4) from the shaft (3). An annular groove (21) is provided on the external surface of the bushing (14) to ensure the interaction with a fork (22) serving for reciprocating displacement of the unit (4) with the meshing elements (5).</p> |
