SU1307107A1 - Pneumatic actuator - Google Patents

Abstract

This invention relates to rodless power cylinders with a flexible member. The aim of the invention is to increase reliability by automatically tensioning the tape. Porpene (p) 4 is hollow and provided with an internal partition 8 with inverse (L Fig. 2

Description

valves 9, 10. In P 4, podpres liquefied plungers 12, 13 of device II for tensioning belt 6, which cooperate with valves 9, 10, are also installed, during an emergency stop of the pickup unit

one

The invention relates to pneumohydraulic actuators, in particular, to non-shaft and power cylinders, in which force is transmitted by means of a flexible element. ,

The purpose of the invention is to increase the reliability of the pneumatic drive by automatically tensioning the belt.

FIG. 1 shows a pneumatic actuator, a general view; in fig. 2 - pneumatic drive, cut; in fig. 3 - valve construction.

The pneumatic actuator includes a housing 1, in which, with the formation of working cavities 2 and 3, a piston 4 is placed. At the ends of the housing 1, there are guide rollers 5 along which the belt 6 slides connected with the force removal unit 7 moving along the housing 1. The piston 4 is hollow and provided with an internal partition 8, in which controlled check valves 9 and 10 are installed. In the hollow piston 4 there is a device for tensioning the belt 11. The device for tensioning the belt 11 consists of plungers 12 and 13, springs -14. The plungers 12 and 13 are placed in the piston 4 with the possibility of movement and are made with axial channels 15, while the ends of the plungers I2 and 13 are connected to the belt 6.

Pneumatic actuator operates as follows.

When supplying the working medium under pressure to one of the cavities of the housing 1, the pistol 4 begins to move, moving the force recording unit 7. If in the process of operation, the force removal unit 7 encounters small interferences, then they

the force of one of the plungers under the action of the spring will move in the direction of the partition 8 and will close the non-return valve, uncoupling the working cavities, which will cause the stop P 4. 3 Il.

are compensated by the springs 14 of the device 1 1. When an emergency stop node

7, the piston 4 continues to move under the action of the pressure of the working medium in the cavity 3. At the same time, the tension of the belt 6 from the side of the cavity 2 weakens and the plunger 12 connected with the belt 6 moves under the action of the spring 14 towards the internal partition

8, interact with a check valve 9, communicating the working cavities among themselves. As a result, the piston stops. After elimination of the accident, the plunger 12 returns to its original position, the check valve 9 intersects the message of the working cavities and the piston 4 moves.

Claims (1)

Invention Formula A pneumatic actuator comprising a body mounted therein with the formation of a piston working from the cavities with a rod made in the form of a flexible tape passing along directional rollers mounted at the ends of the body, an effort removal unit and a belt tensioning device characterized in that, in order to increase the reliability of the drive by automatically tensioning the belt, the piston is hollow filled, provided with an internal partition and controlled check valves placed in the partition, and the belt tensioning device is filled in spring loaded plungers installed in the hollow piston with the possibility of axial movement and interaction with non-return valves. Compiled by Borisova Editor M. Nedoluzhenko Tehred L. Serdyukova Proofreader A. Zimokosov Order 1607/31 Circulation 640 Subscription VNIITSH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, k