SU1154492A1 - Pneumatic drive - Google Patents

Abstract

A pneumatic actuator containing an air motor, a power source, two two-position three-way distributors, one line of each of which is connected to one of the cavities of the air motor, the other line through a non-return valve with a power source, and a third with an exhaust, characterized in that, in order to improve accuracy pneumatic shutdown, pneumatic actuator is equipped with additional check valves, adjustable throttles and reversing valve, two lines connected to the power source and drain, second and third lines and each two-position three-line distributor is connected to one of the lines of the reversible distributor and to one of the cavities of the air motor through one of the adjustable chokes, with a third of the two-position three-way distributor connected to the reversible distributor via an additional non-return valve. (L

Description

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The invention relates to the field of pneumatic actuators and can be used in industrial robots and devices with a smooth stop of heavy duty actuators.

The purpose of the invention is to improve the accuracy of the stop of the air motor.

The drawing shows a diagram of the proposed device.

The pneumatic actuator contains a reversing valve 1, connected by two lines with a pressure source 2 and exhaust 3, an air motor 4 with cavities 5 and 6, two two-position three-way valves 7 and 8, each of which is connected to one of the cavities of the air motor 4 by one line, and two from one of the lines of the reversing valve 1 through check valves 9 and 10 (valve 7) or I and 12 (valve 8), the cavities 5 and b being connected to the reversing valve 1 through adjustable chokes 13 and 14.

Pneumatic operates as follows.

In the original (drawing) position, the compressed gas from the power source 2 through the reversing valve 1, the check valve 9, the valve 7 enters the cavity 5 of the air motor 4 while simultaneously communicating the cavity 6 with the exhaust 3 through the valve 8, the check valve 11 and the reversing valve 1. Piston air motor moves to the right. When a signal is received at the start of braking, the valves 7 and 8 are switched, the locking of cavity 5 and 6 of the air motor by means of check valves 10 and 12, as a result of which the pressure in cavity 5 decreases and in cavity 6 it increases, causing braking of the piston of the air motor 4. In this case adjustable throttle 13 and depressurization of cavity b through adjustable throttle 14 provides adjustment of the piston stopping point of the air motor 4.

Switching the distributor 1 reversing the air motor 4 in the same manner as described.

Claims (1)

A PNEUMATIC DRIVE containing a pneumatic motor, a power source, two two-position three-way valves, one line of each of which is connected to one of the cavities of the pneumatic motor, the other line through a non-return valve - with a power source, and the third - with an exhaust, characterized in that, for the purpose of to increase the accuracy of stopping the air motor, the air actuator is equipped with additional check valves, adjustable throttles and a reversible distributor, two lines connected to a power source and a drain, the second and third lines to Each two-position three-way valve is connected to one of the lines of the reversible valve and to one of the cavities of the air motor through one of the adjustable throttles, and the third line of the two-position three-line valve is connected to the reverser valve through an additional non-return valve.