FIELD: mechanical engineering.;SUBSTANCE: apparatus relates to the field of mechanical engineering, robotics, and can be used in pneumatic and hydraulic equipment. Most effective is an application of the apparatus as a curvilinear movement drive for moving links of industrial robots. The problem of the invention is expanding functionality by ensuring control of the direction of curvilinear movement. The drive is comprised of a rotary mechanism consisting of an annular bellows, along the axis whereof two plugs are fixed at the ends, interconnected by a flexible rod, forming a sealed cavity configured to connect with the pressure tool, a lever is installed on the plug along the axis of the bellows, configured to rotate relative to said axis with a rod fixed thereon shifted relative to the axis.;EFFECT: expanded functionality due to ensured control of the direction of curvilinear movement.;1 cl, 2 dwg
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