摘要:
An attachment for a rotary drive machine of the type having a support stand and power tool means adapted to be mounted on the stand comprising an arm member disposed between and connecting the support stand to the power tool means. The arm member is rotatably secured at one longitudinal end to the support stand and is rotatably secured to and supports the power tool means at its other end. Locking means are provided for locking the arm member to the support stand in its adjusted rotated position while similar locking means are also provided for locking the arm member to the power tool means in its adjusted rotated position.
摘要:
A carriage assembly is fixed to a vertical column, the arm being movable in the carriage assembly. To lock the carriage assembly with respect to the column immovably fixed against rotation, the carriage assembly has a pin penetrating into the column secured on bearings. Circumferentially, a clamping surface is formed on the column, or secured thereto, and an opposed clamping surface formed on the pin, or secured thereto, one of the clamping surfaces being a resiliently movable wall behind which a pressure fluid, such as compressed oil, can be introduced. Upon resilient deformation of the resiliently movable element, the two surfaces will engage and prevent angular displacement of the arm supporting carriage with respect to the column.