Device for converting a stroke movement into a rotary movement

摘要

The invention relates to a device for converting a stroke movement into a rotary movement, which device has a housing (2) which is closed at both ends by means of caps (3) or the like and has a cylinder (4) and in which a piston (6) which can be acted upon by pressure medium is displaceably arranged, which piston (6) is coupled via an external thread (7) to an internal thread (8) of the cylinder (5) and accommodates an output shaft (9) which is directed to the outside and is provided with an external thread (11) which meshes with an internal thread (12) of the piston (6). In order to improve a device of this type to the effect that a change in the swivel-range angle of the device is possible in this device, which change is independent of the swivel angle of the device, it is proposed according to the invention that the internal thread (8) of the cylinder (5) be located in a threaded ring (13) which is designed as a worm wheel of a worm gearing and is rotatably arranged in the housing (2), the worm (14) of the worm gearing being rotatably mounted in the housing (2) transversely to its longitudinal axis. <IMAGE>