Tensioning mechanism for a continuous belt or chain drive system

摘要

An apparatus (10) for imparting tension to strands of an endless power transferring member loop (12) encircling a drive sprocket (14) and at least one driven sprocket (16a, 16b). Two tensioning arms (38a, 18b) are spaced apart and have guided movement relative to at least one fixed pin (26) with a tension driver (5) operably engaged with one of the tensioning arms (18a, 18b) for driving both tensioning arms (18a, 18b) in motion acting through a rotatable, motion transfer body (34) located generally centrally with respect to the endless loop power transferring member (12) for connection to corresponding motion transfer locations (30a, 30b) associated with the pair of tensioning arms (18a, 18b), either directly or indirectly. A link assembly (60) can connect first ends (40a, 40b) to the motion transfer body (34) and second locations (42a, 42b) to corresponding opposite ends of the two spaced apart tensioning arms (38a, 18b).

主权项

1. A tensioning system (10) for imparting tension to an endless loop power transferring member (12) encircling a drive sprocket (14) and at least one driven sprocket (16a, 16b) comprising:
a pair of tensioning arms (18a, 18b), each tensioning arm having a guided arm movement mechanism (26), a motion transfer location (30a, 30b) and a shoe (20a, 20b) with a power-transferring-member-sliding face (22a, 22b), each guided arm movement mechanism having a separate fixed pivot pin (26b) connected to the pivot of each tensioning arm (18a, 18b) located outside the endless loop power transferring member (12); a monolithic rotatable, motion transfer body (34) located generally centrally with respect to the endless loop power transferring member (12) for connection to corresponding motion transfer locations (30a, 30b) associated with the pair of tensioning arms (18a, 18b), the motion transfer locations (30a, 30b) located distally opposite with respect to one another such that the two tensioning arms rotate in a common rotational direction during tensioning actuation and a tension driver (50) located outside of the endless loop power transferring member (12) and operably engaging one of the pair of tensioning arms (18a, 18b) for driving both of the pair of tensioning arms (18a, 18b) relative to one another.