SU808720A1 - Three-position rotary pheumatic drive - Google Patents

Description

(54) THREE-POSITIONAL TURNING PNEUMOLATIVE 38 scrap 5, a disk 6 with a radial protrusion 7 and disks 8 and 9 with face protrusions Yu and Ts are mounted on the KoTXjpoM. The disks 6.8 and 9 have the ability to be reinstalled relative to each other. On a rotary motor, axially (not marked) of the output shaft 5, a cylindrical body 12 is fixed, on the walls 13 of which, in turn, stops 14 of the extreme positions, end and brake switches 15 and an emphasis controlled by a pneumatic cylinder 16 mounted on a rod 17 pneumoiindra 16 rotary link 18, equipped with a roller 19 and the limiter 2O of the angle of rotation. The stops 14 Kpaflifflx of the positions are in the form of cones installed in the housing 12 with the possibility of radial movement relative to the output shaft 5. The three-position rotary actuator operates as follows. In the initial state, an idle torque is applied to the output shaft 5 of the drive, ensuring the contact of the stop device with the protrusion of the corresponding disk. When a rotation command arrives at the actuator, the rod 17 moves out with the link 18 and the roller 19, and the working torque of the corresponding direction is applied simultaneously to the output shaft 5. When the operating unit approaches the intermediate position of the control systems, it brakes with a subsequent decrease in the torque to the idle torque of its torque, the radial protrusion 7 of the disk 6 finds on the roller 19 of the link I8i turning it and occupying a symmetrical position relative to the cylinder 17 of the cylinder. If it is necessary to continue moving the actuator in the direction of its previous movement, the rod 17 with link 18 and roller 19 is drawn in, releasing the radial protrusion 7 of the disk and working torque is fed to the output shaft 5 instead of idle torque. Presetting of the total angle of rotation and intermediate point about 0 anov is made by the corresponding mutual radial position of the end protrusions 7, 10 of the discs 6, 8 and 9. Fine tuning of the stop position is produced by the radial movement of the pores 14 interacting with the end projections of the Yu and II discs 8 and 9 the proposed design solution allows for a compact drive to drive in a wide range and with a sufficiently high degree of accuracy adjust the overall angle of rotation and intermediate stopping point of the output shaft drive. The introduction of the link 18 with the roller 19, hinged to the rod 17, makes it possible in the simplest way to ensure that the intermediate stopping position remains unchanged when the positioning direction changes. Emulsion of the Invention Three-part rotary pneumatic actuator containing a rotary pneumatic motor with an output shaft, a disk with a radial protrusion fixed to the output shaft, interacting with an adjustable pneumatic cylinder, and extreme positions stops. end and brake switches, characterized in that in order to simplify the casing and improve serviceability, an air motor concentric to the axis of the output shaft has a cylindrical body, in the wall of which the specified pneumocylinder is mounted, and the last stop controlled by it is designed as a rotary link equipped with a roller and a limiter mi rotation angle, and on the disk with. the radial protrusion is fixed with the possibility of reinstallation with respect to the latter and relative to each other two disks with face faces for interaction with the stops of the extreme positions, which are made in the form of two cones installed in the housing with the possibility of radial movement relative to the output shaft. Sources of information taken into account in the examination I. USSR author's certificate N 503713, cl. At 25 J 11/00, 1974. to %%%%%%%%% w: w

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Rig. R

lA ///// ///// ttsch /// tt

15

FIG. 3

Claims (1)

Claim 25 Three-position rotary pneumatic actuator containing a rotary pneumatic motor with an output shaft, a disk mounted on the output shaft with a radial protrusion interacting with a stop controlled by a pneumatic cylinder, stops of extreme positions ,. end and brake switches, which is characterized by the fact that in order to simplify the design and improve serviceability _{35 of} life, a cylindrical housing is installed on the pneumatic motor concentrically to the axis of the output shaft, the indicated air cylinder is installed in the wall, and the stop controlled by the latter is made in the form of a rotary link, equipped with a roller and limiters of the angle of rotation, and on the disk with. with a radial protrusion fixed with the possibility of reinstallation relative to the last and relative to each other two disks with end protrusions ⁴⁵ pami for interaction with the stops of extreme positions, which are made in the form of two cones mounted in the housing with the possibility of radial movement relative to the output shaft. 50 Sources of information taken into account during the examination 1. Copyright certificate of the USSR N? 503713, cl. At 25 J 11/00. 1974. 5-5 ' FIG. 3