Radialarmsägesteuervorrichtung.

摘要

Mechanism for controlling the rate of travel of a saw unit (32), (38) as the saw (38) operates and travels upon a radial arm (26). A housing (74) contains fluid and an axially movable piston (78) and a piston rod (82). A wheel (92) is operably joined to the piston rod (82) and is connected to the piston rod (82) so that the piston rod (82) moves axially as the wheel (92) rotates. A cable (110) is wound upon the wheel (92) and extends from the wheel (92) and is connected to the saw unit (32), (38). As the saw unit (32), (38) is moved upon the radial arm (26) the cable (110) rotates the wheel (92), and the wheel (92) forces axial movement of the piston rod (82) and the piston (78). Movement of the piston (78) forces movement of fluid within the housing (74). The pressure of the fluid upon the piston (78) controls the rate of axial movement of the piston (78) and the piston rod (82) and controls the rate of rotary movement of the wheel (92). Thus, the rate of travel of the cable (110) and the rate of travel of the saw unit (32), (38) are controlled by the rate at which the piston (78) travels as the piston (78) moves fluid within the housing (74).