| 摘要 |
<p>The present invention relates to drive assemblies, and particularly to drive belt and drive chain assemblies for operation of doors, gates or barriers. The invention provides a connector for a flexible toothed belt or similar, including a body having an internal recess with a shaping complementary to that of the toothed belt, configured to allow an end portion of the belt to be engaged therein in a direction transverse to the belt longitudinal direction, so to retain the belt against disengagement in the longitudinal direction. Further, the invention provides a drive assembly including a rail or track, a trolley for connection to the door, gate or barrier, the trolley mountable to run along the rail or track, a longitudinal drive means comprising a chain or belt, connectable in a closed loop arrangement around or within the rail or track, the trolley provided with an engagement means for selective engagement between the trolley and the longitudinal drive means, whereby the engagement means includes an engagement member arranged for selective movement in a direction substantially transverse to the longitudinal direction of the longitudinal drive means and in a direction less than 45° from the plane of the loop of the longitudinal drive means. Also provided is a drive assembly including a partially enclosed track, a trolley for connection to the door, gate or barrier, the trolley mountable to run within the partially enclosed track, a longitudinal drive means, such as a chain or belt, connectable in a closed loop arrangement within the partially enclosed track and engageable with the trolley, the trolley provided with wheels adapted to run within and supported by the partially enclosed track.</p> |
