SU832144A1

SU832144A1 - Hydraulic cylinder with variable piston stroke

Info

Publication number: SU832144A1
Application number: SU782690331A
Authority: SU
Inventors: Станислав Дмитриевич Гололобов; Юрий Алексеевич Староверов
Original assignee: Челябинский Политехнический Институтим.Ленинского Комсомола
Priority date: 1978-11-29
Filing date: 1978-11-29
Publication date: 1981-05-23

Description

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Изобретение относитс к машиностроению и может найти применение в гидросистемах станков дл точного позиционировани , в сельскохоз йственных, транспортных машинах, в испытательных стендах с гидроприводом .The invention relates to mechanical engineering and can be used in hydraulic systems of machine tools for precise positioning, in agricultural, transport machines, in hydraulic test benches.

Известен гидроцилиндр с измен емой длиной хода поршн , механическа регулировка хода которого обеспечиваетс конструкцией поршн , выполненного регулируемым по длине 1.A hydraulic cylinder with a variable piston stroke is known, the mechanical adjustment of the stroke of which is provided by the design of the piston, which is made adjustable in length 1.

Однако имеют место сложность в дистанционном регулировании длины хода поршн и невозможность измен ть величину хода в процессе работы гидроцилиндра, что нередко требуетс в гидроприводе.However, there is a difficulty in remotely controlling the stroke of the piston and the inability to change the stroke in the course of operation of the hydraulic cylinder, which is often required in the hydraulic drive.

Известен также гидроцилиндр с измен емой длиной хода поршн , в корпусе которого установлен поршень состо ш,ий из двух частей, перва из которых жестко соединена со штоком, а втора установлена на штоке с возможностью перемещени относительно первой 2.Also known is a hydraulic cylinder with a variable stroke length of the piston, the casing of which has a piston consisting of two parts, the first of which is rigidly connected to the rod, and the second is mounted on the rod so that it can move relative to the first 2.

Однако этот гидроцилиндр конструктивно сложен.However, this hydraulic cylinder is structurally complex.

Цель изобретени - упрощение конструкции гидроцилиндра.The purpose of the invention is to simplify the design of the hydraulic cylinder.

Поставленна цель достигаетс тем, что во второй части поршн выполнена концентрично штоку расточка, а гидроцилиндр снабжен закрепленной на штоке гильзой, установленной в указанной расточке, причем в штоке выполнены каналы дл подвода управл ющей жидкости, один из которых выведен в расточку, а другой - в зону между част ми поршн .The goal is achieved by the fact that in the second part of the piston the bore is concentrically made to the rod, and the hydraulic cylinder is provided with a sleeve fixed to the rod, installed in the said bore, with channels for supplying control fluid in the rod, one of which is bored into the bore and the other in the area between the parts of the piston.

С целью изменени пределов регулировани гильза может быть установлена на штоке с возможностью изменени начально0 го положени .In order to change the limits of adjustment, the sleeve can be mounted on the rod with the possibility of changing the initial position.

На чертеже схематично изображен гидроцилиндр .The drawing schematically shows a hydraulic cylinder.

Claims

A piston consisting of two parts — half-5 pistons 2 and 3 — is mounted in the hydraulic cylinder body 1. Semi-piston 2 is rigidly connected to the stem 4, having channels 5 and 6 for supplying control fluid. Pilot 7 is mounted on the rod fixedly and, half-piston 3, which is movable between sleeve 7 and semifold 2, is made in the form of a sleeve with concentric rod bore 8. Assembly restrictive sleeve 7 enters into the bore 8 of semi-piston 3, forming a cavity 9, where channel 5 for supplying control fluid. Channel 6 is in the area between the half-pistons 2 and 3. In order to change the limits of adjustment of the piston stroke, the restrictive sleeve 7 is installed on the rod with the possibility of reinstallation, for example, on the thread. The change in the stroke of the hydraulic piston is made as follows. When the control fluid is supplied through the channel 5 into the cavity 9, the palaporshen. 3 is pressed by the fluid pressure against the half piston 2, and the piston has the smallest, „„ „„ size and the maximum working stroke. When the control fluid is supplied through the channel o between the pistons z and 3, the semi-piston 3 is pressed by the fluid pressure all the way into the restrictive sleeve 7, and the piston has the largest size and the smallest stroke. The minimum stroke of the piston can be pre-adjusted by moving the restrictive sleeve 7 on the rod 4, if installed on the thread, by screwing it in or screwing it in. In the proposed construction, there are no parts related to stroke adjustment, which are able to go out of business before the expiration date of the hydraulic cylinder. In addition, the simplified design makes the hydraulic cylinder as a whole more technologically advanced. manufacturing and also simplifies its c6ofrka and dismantling. Claim 1. Piston cylinder with variable piston stroke, in the casing of which a piston is installed, consisting of two parts, the first of which are rigidly connected to the rod and the second is mounted on the rod with the ability to move relative to the first, characterized in the second part of the piston is concentrically bore out of the rod, and the hydraulic cylinder is provided with a pin mounted on the rod installed in the said bore, with channels for supplying control fluid in the rod, one of which is s put into the bore, and the other into the zone between the poroshn parts. 2. A hydraulic cylinder according to claim, characterized in that, in order to change the limits of regulation, the sleeve is installed on the rod with the possibility of changing the initial position. Sources of information taken into account in the examination 1. US patent number 3815480, cl. 91-167, 1974.

2.Patent of France No. 2347556, cl. F 15 B 15/24, 1977

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