SU924434A1 - Pneumatic /hydraulic/ cylinder - Google Patents

Description

{5) PNEUMATIC (HYDRAULIC) CYLINDER

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The invention relates to mechanical engineering, in particular, to rotary actuating devices or for controlling pipeline valves, and can be used in other areas of the national economy.

A hydraulic cylinder is known that contains pistons connected by a common shaft to the output shaft and installed in the cylinder to form working cavities communicated with pressure and drain lines, and adjustable stops oi limit the angle of rotation of the output shaft, each of which is mounted on the end face of the cylinder and made in the form of a threaded rod with a separator and adjusting discs placed in the housing with the formation of two cavities, one of which is connected to the porous highway D.

A disadvantage of the known device is the impossibility of fixing the output shaft in extreme positions, which is unacceptable when controlling certain types of pipe fittings, for example, with dampers or rotary valves.

The purpose of the invention is to increase the reliability of work and expand the scope of application of the cylinder by ensuring the output shaft is fixed in the final positions.

The goal is achieved by the fact that the separator is adjustable

to the stop is made in the form of a spring-loaded locking element with a conical locking surface, the cavity of the body of the adjustable stop restriction for turning the output

15 shaft, connected to the pressure line and the working cavity of the cylinder.

The angle of taper of the locking surfaces of the locking element is less than their friction angle.

20

The locking element is spring-loaded with respect to the adjusting disk and the body end face opposite to the disk.

magic (hydraulic) cylinder, general view; figure 2 - adjustable stop in the closed position.

The pneumatic (hydraulic) cylinder consists of body 1, pistons 2 and 3 connected by a common rod C with an output shaft 5, as well as adjustable stops 6 and 7 mounted at the ends of body 1. Adjustable stop 6 consists of body 8, in which Two cavities A and B are fitted with a conical locking element 9 freely moving on the threaded rod 10. The locking element 9 is pressed on both sides by springs 11 and 12, one of which (11) abuts against the stop body 8, and the other (12) threaded disk .13 mounted on a re.zbovoy suit stock Yu. carving. the claim 13 is provided with cams 14 interacting with counter cams 15 on the housing B of the stop when the locking element 9 is fully opened. The stiffness of the spring 11 is greater than the spring 12. The channels 8 are made of channels 16 and 17 for connection to the pressure and drain lines and the channel 18 and .19 for connection to working cavities 20 and 21 cylinders. Pneumatic (hydraulic) cylinder works as follows. When the left stop 6 is closed (Fig. 1, the right stop 7 is open. When pressure is applied through channel 16, pressure in cavity A increases, as a result of which locking element 9 begins to move to the right, compressing spring 12 and opening access of working fluid to cavity B and through channels. 18 and 19 into the working cavity 20. The pistons 2 and 3 move from the leftmost position to the right, displacing the working fluid from the cavity 21 through the cavities of the right stop to the drain line. When approaching the rightmost position, the piston 3 abuts the rod 10, moves it to close zap In this case, the spring element 11 is compressed and the spring 11 and the cavity A and B are separated from the right stop 7. The movement of the pistons 2 and 3 stops (due to incompressibility of the fluid) f the output shaft 5 is fixed in the extreme right position, moreover smaller than the friction angle, jamming occurs, and the locking element 9 cannot samop

Claims (1)

1. USSR author's certificate No. it09010, cl. F 15 B 15/2, 1971. 1 6 IS ./H //// one/. /