SU937802A1 - Hydraulic cylinder - Google Patents

Description

(5t) HYDROCILINDER

one

The invention relates to mechanical engineering, in particular to hydraulic actuating mechanisms, and can be used in machine tool construction and other sectors of the national economy.

Known power cylinder, containing a stepped body mounted on it on the rod rod rigidly fixed piston of small diameter and floating piston of large diameter, made with a central bore and installed in the housing with the formation of the working and drainage 1.

A disadvantage of the known hydraulic cylinder is the increased flow rate of the working fluid in the event of a rapid supply of the rod to the silo-loading object with subsequent force action on it, where there is less speed of the rod movement.

The purpose of the invention is to reduce the flow rate of the working fluid due to the accelerated supply and removal of the rod to the force loading object and the subsequent slow action on it with increased force.

This goal is achieved by the fact that the housing is equipped with a partition installed with the formation of a rod cavity of a small-diameter piston, which is communicated via channels with a working and drain bands, with the inlet opening of the channel telling the rod and working cavities to be greater than than the sum of the axial length, the piston of small diameter 15 ra and the magnitude of the working stroke of the floating piston, and the inlet of the channel, which communicates the rod and drain cavities, is made at the level of the partition. Also floating

Claims (3)

20, the piston is provided with a locking device, which is installed in the central bore of the floating piston and is made in the form of a split conical 39 spring-loaded bushing interacting with a washer with movable stops in contact with the housing partition. The locking device can be made in the form of spring-loaded balls. FIG. 1 shows a hydraulic cylinder in section, with a locking device made in the form of a split spring-loaded conical sleeve; in fig. Z locking device in, ide spring loaded balls. The hydraulic cylinder contains a stepped housing 1. With a partition 2, in which a fixed piston 4 of small diameter is mounted on a common rod 3 and a floating piston 5 of large diameter forming a working cavity 6 in the housing 1 and a drain cavity 7- The piston cavity 8 of piston k 8 is connected channels 9 and 10 with cavities 6 and 7, respectively. The inlet 11 of the channel -9 is located at a distance from the partition 2 greater than the sum of the axial length of the piston k and the stroke of the piston 5. The inlet 12 of the channel 10 is made at the level of the partition 2. In the central bore there are 13 pistons 5 times. Bounding a tapered sleeve 1 with a spring 15; Sleeve k interacts by means of a washer 16 with movable stops 17 in contact with a partition 2. The locking device can be made in the form of balls 18 with springs 19. The housing 1 is equipped with holes 20 and 21 for feeding the working fluid. The hydraulic cylinder works as follows. When the working fluid is supplied through the hole -20, the piston fixed on the rod 3 is rapidly displaced. Cavities 6-8 are communicated at this time with a drain through channels 9 and 10 and aperture 21. When the piston passes through the inlet port 1, cavity 1 communicates with the discharge line. The floating piston 5 begins to move, moving the stops away from the septum, allowing the spring 15 to press the split conical sleeve H to the bore 13. The piston 5 is fixed on the rod and allows for increased force on the rod. In order to return the pistons and 5 to the initial position, the working fluid is supplied to the opening 21. The opening 20 thus communicates with the drain. The piston 5 begins to move, the movable stops 17, in contact with the partition 2, act on the washer 16, press the split conical sleeve 1 and compress the spring 15 - the floating piston 5 unscrews and the rod 3 accelerates to its original position with a lower flow rate coming into the cavity 8 through the channel 10. The use of a hydraulic cylinder of this design allows not only to reduce the flow of working fluid, but also by using a pump of lower capacity to use electric motors smaller which results in energy savings. Claim 1. A hydraulic cylinder containing a stepped housing mounted in it, on a common rod a rigidly fixed piston of small diameter and a floating piston of large diameter, made with a central bore and installed in the housing with the formation of drain cavities, characterized in that, in order to reduce the flow rate of the working fluid, the floating piston is provided with a locking device; the housing is equipped with a partition mounted to form a piston rod cavity small diameter, which is communicated through channels, with the working and drain cavities, the inlet opening of the channel connecting the rod and working cavities located from the partition at a distance greater than the sum of the axial length of the small diameter piston and the stroke of the floating piston, and the inlet of the channel, which communicates the rod and drain cavities, is made at the level of the partition. 2. The hydraulic cylinder according to claim 1, wherein the locking device is installed in the central bore of the floating piston and made in the form of a sub-right split conical sleeve, interacting with a washer with movable stops in contact with the housing partition. 59378026 3. Hydraulic cylinder gk P.1, about tl and-Sources of information, due to the fact that fixed-taken into account during the examination The device is made as 1. USSR author's certificate spring-loaded balls., Vf kk7B27, cl. F 15 B 11/12, 1973. / ///// (// Л Y //