SU1557369A1 - Hydropneumatic follow-up drive - Google Patents

Abstract

The invention relates to hydraulics and can be used in control systems of vehicles and industrial robots. The aim of the invention is to improve speed, efficiency and accuracy. The pneumatic engine 2 and the hydraulic pump 3, together with the pneumatic-hydraulic control device 7, are connected with the common shaft 1 to test the signal of the setting device 29 and to form a pressure differential in the cavities 18, 19 of the hydraulic cylinder 4, which moves the actuator 6. At the same time, through the kinematic chain 23 Zi, including the gear 34, the pneumatic distributor 8 and the control valve 14 of the device 7 return to the neutral position. 1 hp f-ly, 5 ill.

Description

the bridge 18, 19 of the hydraulic cylinder 4, which moves the actuator 6. At the same time, via the kinematic feedback circuit 23, including

15573694

gear 34, the pneumatic distributor 8 and the hydraulic distributor 14 of the device 7 return to the neutral position. 1 hp f-ly, 5 ill.

The invention relates to hydraulics and can be used in control systems of vehicles and industrial robots.

The purpose of the invention is to increase speed, efficiency and accuracy.

FIG. 1 is a schematic diagram of a pneumatichydric follower drive; FIG. 2 is a section A-A in FIG. 1; in fig. 3 - section B-Bnafig. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a section of YYD in FIG. one.

A pneumatically-hydraulic servo drive unit contains a pneumatic motor 2 and a hydraulic pump 3 connected by a common shaft 1, a hydraulic cylinder 4 rotates with a piston 5 connected to (actuator 6, for example, a vehicle's wheel turning mechanism (not shown), and a pneumohydraulic control device 7, including control valve 8, connected by channels 9, 10 to engine 2 and two normally open auxiliary distributors 11 and 12, connected by inputs to engine 2 and pneumatic source 1 3 feeds, and outlets with atmosphere, and a control valve 14 with a rotary element 15 having windows 16 and 17 connected to pump 3, cavities 18 and 19 of the hydraulic cylinder 4, respectively, and through check valves 20 and 21 with hydro accumulators the torus 22, and the kinematic feedback circuit 23 on the position of the common shaft 1 connected to the rotary element 24 of the pneumatic distributor 8, the windows 25 and 26 of which face the segment face protrusion 27 of the movable valve 28 of the pneumatic distributor 8 connected to the unit 29, for example, steering wheel tra vehicle The engine 2 and the pump 3 is made full-turn, and the valve 14 is equipped with a movable valve 30 facing the windows 16 and 17 of the rotary element 15 of the valve 1.

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which is rigidly connected to the rotary element 24 of the pneumatic distributor 8 and connected by an elastic element 31, such as a flat spring, to a movable valve 28 of the pneumatic valve 8, rigidly connected to the movable valve 30 of the hydraulic distributor 24, made with through holes 32 and 33. Kinematic chain 23 feedback on the position of the common shaft 1 is equipped with a gear 34 mounted between the element 24 of the pneumatic distributor 8 and the pump 3.

The air valve 8 is associated with throttles. The windows 25 and 26 of the pneumatic distributor 8 are symmetrical with respect to the horizontal axis (Fig. 2, section A-A) and have a width of 2a, where a is the distance from the horizontal axis to the chord, which limits the height of the segment face protrusion 27 (Fig. 2 is section B- B).

Windows 16 and 17 of the control valve 24 have a width b equal to the width of the movable valve 30.

Pneumo-hydraulic servo drive works as follows.

Upon receipt from the setting device 29 of the input signal, i.e. when the steering wheel is rotated, for example, clockwise, the movable flaps 28 and 30 of the pneumohydraulic control device 7 rotate tightly connected to one another. This causes the movable damper 30 to move relative to the windows 16 and 17 of the hydraulic distributor 24 and to open the windows 16 and 17 as well as the displacement of the axial end protrusion 27 of the movable damper 28 of the pneumatic distributor g 8 relative to the windows 25 and 26 of the pivoting member 24 and causes one of the windows to open, in this case the window 25, while the window 26 remains closed.

As a result, the air pressure in the channel 9 decreases, the distributor 11 switches to the lower one in FIG. 1 position and air through the throttle 36 and the distributor 11 leaves in the atmosphere. 2

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Claims (2)

The claims, pneumohydraulic control device, including 1. Pneumohydraulic servo drive, containing a pneumatic motor and a hydraulic pump I FIG. 3 of Fig. 2 is a control pneumatic distributor connected by channels to a pneumatic motor and two normally open auxiliary distributors, each connected to the input of a pneumatic motor and a pneumatic power source; and the outlet - with the atmosphere, and a control valve with a rotary element having windows connected to the hydraulic pump, and through check valves - with a hydraulic accumulator, as well as a kinematic feedback circuit for the position of the common shaft associated with the rotary element of the valve, the windows of which are facing ' to the segmented end protrusion of the movable valve of the pneumatic valve associated with the setter, characterized in that, in order to increase speed, efficiency and accuracy, the valve is equipped with and with through holes, a movable flap, obg> to the windows of the rotary valve of the valve, the latter is rigidly connected to the rotary element of the valve and is equipped with an elastic element connected to the valve of the valve, rigidly connected with the valve of the valve. 2. A drive with a cylinder, one dinene with a hydraulic pump and another valve, the kinematic feedback circuit is equipped with a gearbox, and the pneumatic motor and hydraulic pump are made fully rotated. p. 1, distinguished by the fact that it is equipped with a hydrocavity of which soya, and with the window of the control GG FIG. 5