| 摘要 |
<p>The drain cleaning apparatus (10) for rotating a drain cleaning snake which is manually advanced through the apparatus comprises a frame and housing assembly (12,14,16) supporting an axially displaceable non-rotating clutch actuating shaft (52) which in turn supports a first annular clutch actuator (88) for rotation relative thereto and axial displacement therewith. A second annular clutch actuator (136) is coaxial with the first actuator (88) and axially spaced therefrom and is supported in the housing for rotation relative thereto. A radially expandable and contractible clutch (138) is axially captured between the two clutch actuators (88,136) and, in response to displacement of the first clutch actuator toward the second, the clutch (138) is radially contracted to engage a drain cleaning snake extending through the clutch actuating shaft (52), the clutch actuators (88,136) and the clutch (138). A motor (110) in the housing drives the first clutch actuator (88) through a transmission pulley and belt arrangement including a pulley (126) driven by the motor (110) and with respect to which the belt (132) is axially slidable in response to axial displacement of the first clutch actuator (88) toward and away from the second clutch actuator (136). The clutch (138) and second clutch actuator (136) are axially positioned in a shroud (18) at one end of the housing, and the position of the second actuator (136) relative to the first actuator (88) is axially adjustable to adjust the initial contracted disposition of the clutch (138) for the apparatus (10) to accommodate drain cleaning snakes having different diameters. The shroud (18) is mounted on the frame for pivotal displacement axially outwardly from the remainder of the housing to facilitate removal and replacement of the clutch (138) and access to the second clutch actuator (136) and a housing portion (16) adjacent the shroud (18) is removable to provide access to the transmission components. <IMAGE></p> |
