SU1465641A1 - Hydraulic cylinder - Google Patents

Abstract

Invention m. used in the construction of brake devices to hydraulic cylinders, where it is necessary to obtain braking of the load with a smooth stop. The purpose of the invention is to simplify the design and expand the functionality of the hydraulic cylinder by providing a given law of inhibition. On the cover 2 with the axial channel (K) 8 of the housing 1 is fixed a piston rod 3. A braking device in the form of an elastic element is mounted on a cap 2 with the possibility of interaction with the piston rod 3 and K 8. The elastic element is designed as a cup spring 6 with a hemispherical protrusion 7 placed coaxially with K 8. Protrusion 7 is mounted relative to K 8 with the possibility of providing a quadratic law of changing the area of the flow area K 8, which creates a corresponding variable hydraulic resistance to the movement of fluid. 1 hp f-ly, i ill. § (Л с 4; О5 or O) 4

Description

The invention relates to mechanical engineering and can be used in the construction of a brake from an EHD device to hydraulic cylinders, where it is necessary to obtain braking of the load with its smooth stopping.

The purpose of the invention is to simplify the design and extend the functionality by providing a given law of inhibition. I The drawing shows the hydro-I node of the braking device.

The device comprises a housing 1, I a cover 2Jshort-piston 3 with a stem 4, fixed on the cover 2 by means of a nut 5, an elastic element in the form of a disk-shaped spring 6, on which a hemispherical projection 7 is made. 9 with hydro-system. The protrusion 7 is placed in alignment with channel 8 with the possibility of providing the liver with a quadratic law for changing the area of the passage section of channel 8.

The brake device operates as follows.

In the initial position of the spring the spring 6 is in a free state (in the drawing the position of the device in the initial state is indicated by dash-dotted lines), the protrusion 7 does not block the channel 8. When the piston-spring 3 acts on the disc spring 6, the latter is compressed by the protrusion 7 the channel 8 begins to overlap. The nut 5 does not allow the disc spring 6 to move away from the supporting surface on the lid 2, the cross section of the disc spring 6 enters.

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five

about Q

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around its internal diameter, with the flow area in front of the axial channel 8 changing according to a quadratic law, which creates a corresponding variable hydraulic resistance to the movement of fluid from the rod cavity 9 into the hydraulic system.

Thus, the introduction of a braking device consisting of a disc spring 6 with a hemispherical protrusion 7 into the structure ensures braking of the rod-piston 3 according to a given law.

Claims (2)

1. A hydraulic cylinder 5 comprising a housing, a piston rod, a bolt, at least one of which is provided with an axial channel for communication with the hydraulic system, and a braking device in the form of an elastic element mounted on the cover with the possibility of interaction with the piston rod and with an axial channel, characterized in that, in order to simplify the design and extend the functionality by providing a given braking law, the elastic element is designed as a disc spring with a hemispherical protrusion placed coaxially with the channel in the crest. 2. Hydraulic cylinder according to p; 1, characterized in that the hemispherical protrusion is installed relative to the channel in the outer direction with the possibility of providing a quadratic law, the law of changing the channel cross-section area. - Compiler V. Yakovenko Editor L. Veselovska Tehred A. Kravchuk Proofreader V. Romanenko Order 927/37 Circulation 602 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Subscription