RU1793110C - Hydraulic cylinder - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to hydraulic cylinders with rotational movement of the rod, and can be used as a drive in modular machines and automatic lines. The aim of the invention is to reduce the dimensions of the hydraulic cylinder while providing one-sided rotation of the shaft. This goal is achieved by the fact that the permanent magnets in the piston are mounted with the possibility of movement in radial directions and are made with drive pistons located in the piston cavities with the formation of rod and piston cavities. In this case, the piston cavities are in communication with one working cavity, and the rod cavities with the other working cavity of the hydraulic cylinder. 2 ill.

Description

The invention relates to a machine builder, namely to hydraulic cylinders by rotational movement of the rod, and can be used as a drive in aggregate machines and automatic lines.

A hydraulic cylinder is known, comprising a housing and a piston disposed therein and extending through an opening in the last one, moreover, in the piston opening. on the surface of the rod along the helix of the wedge, there are guide elements.

The disadvantage of this hydraulic cylinder is insufficiently tight sealing of the screw connection between the piston rod, which reduces the degree of reliability and hydraulic cylinder,

A hydraulic cylinder is known, it comprises a housing and a piston located therein and passing through an opening in the last shaft, and in a helical position on the piston hole and on the shaft surface

guide elements made in the form of permanent magnets. Shaft magnets are placed between a pair of piston magnets to interact with like poles.

The disadvantage of this hydraulic cylinder is that its design does not allow the shaft to rotate in one direction during the reciprocating movement of the piston without additional devices, the installation of which will increase the size of the hydraulic drive.

The aim of the invention is to reduce the dimensions of the hydraulic cylinder while providing one-sided rotation of the shaft.

This goal is achieved by the fact that the permanent magnets in the piston are mounted to move in radial directions and are made with drive pistons located in the piston cavities, with the formation of rod and piston

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out cavities. In this case, the piston cavities are in communication with one working cavity, and the rod cavities are connected with the other working cavity hydraulic. lindra.

In Fig. 1, a hydraulic cylinder is shown; figure 2 - cross section aa in fig. 1, where permanent magnets are made, their location and interaction.

The hydraulic cylinder comprises a housing 1 with openings 2 and 3 for supplying a working fluid. In the housing 1 with the formation of the working cavities 4 and 5, a piston b is placed movably mounted on the shaft 7. The shaft 7 is mounted in the housing 1 with the possibility of rotation. The axis of the shaft 7 is eccentrically displaced relative to the axis of the housing 1. In the shaft 7, permanent magnets 8 located along helical lines are rigidly fixed to the cylindrical surface. In piston, b. also, with an exit to the cylindrical surface of the hole with the possibility of radial movement, permanent magnets 9 are installed, made with drive pistons 10 located in the cavities of the piston b with the formation of rod 11 and piston 12 cavities. The piston cavities 12 are communicated by the openings 13 with the working cavity 5, and the rod cavities 11 are connected by the openings 14 with the working cavity 4. The permanent magnets 8 and 9 are mounted opposite each other with the same poles (see FIG. 2). Magnets 8 of the shaft 7 are placed

Claims (1)

SUMMARY OF THE INVENTION A hydraulic cylinder comprising a housing, a piston, two working cavities, a shaft eccentrically located in the housing on supports and passed through an opening in the piston, permanent magnets located in the shaft and piston with the same poles reaching the cylindrical surfaces of the shaft and the piston holes, this is the permanent magnets on. the shaft is arranged along helical lines, and in the piston - in pairs with the placement between the permanent magnets of each between the pair of magnets 9 of the piston 6. The shaft 7 and the piston 6 are made of non-magnetic materials. When the working fluid is supplied under pressure into the working cavity 5, the piston 6 will begin to move in the axial direction (working stroke). At the same time, under the pressure of the working fluid that penetrated through the holes 13 into the piston cavities 12, the permanent magnets 9 approach the shaft 7. Due to the fact that the shaft 7 is offset eccentrically relative to the axis of the housing 1, the piston 6 is locked against rotation. When moving the piston 6 along the shaft 7 due to forces The repulsions arising between the poles of the same name, the magnets 8 tend to maintain their middle position between the magnets 9, but since the magnets 9 are located along helical lines, the shaft 7 will rotate. When applying the working fluid under pressure to the working cavity 4, the piston will idle along the shaft 7 without having any effect on it, because working liquid having entered through the holes 14 into the rod cavities 11 will divert the permanent magnets 9 from the surface of the shaft 7 and the interaction of the magnets 8 and 9 will be interrupted. A series of working fluid in the cavity 4 and 5, we obtain continuous and unlimited rotation of the shaft 7 in one direction. To reduce the pulsation of the rotation of the shaft 7, a flywheel may be mounted on it. a pair of permanent shaft magnets, characterized in that, in order to reduce the dimensions while ensuring one-sided rotation of the shaft, permanent magnets in the piston mounted with the possibility of moving in the radial directions of the piston and made with drive pistons located in the piston cavities with the formation of rod and piston cavities. in this case, the piston cavities are in communication with one working cavity, and the rod cavities with the other working cavity. Fig. | I4 Aa