SU614270A1

SU614270A1 - Piston-to-stem connection

Info

Publication number: SU614270A1
Application number: SU762388016A
Authority: SU
Inventors: Владимир Сидорович Тарасенко
Original assignee: Дружковский Ордена Ленина Машиностроительный Завод Им.50-Летия Советской Украины
Priority date: 1976-07-12
Filing date: 1976-07-12
Publication date: 1978-07-05

Description

(54) СОЕДИНЕ1«Е ПОРШНЯ СО ШТСЖОМ(54) CONNECT1 "E PISTON WITH SHTSZHOM

1one

Изобретение относитс к машиностроению и может быть использовано в силовых цилиндрах различного назначени , а именно в гидроцнлиндрах с двусторонним нагруженнем поршн шахтных механизированных крепей, породопогрузочных н подъемно-транспортных машин .The invention relates to mechanical engineering and can be used in power cylinders for various purposes, namely, in hydraulic cylinders with double-sided loaded piston of mine mechanized roof supports, rock loading and handling machinery.

Известно соединение поршн со штоком, в котором поршень закреплен на штоке при помощи резьбового крепежного элемента, навинчиваемого на резьбовое окончание штока. Go стороны штоковой полостн поршень ограиичен ступенькой, выполненной на штоке Jl|. Known connection of the piston with the rod, in which the piston is attached to the rod by means of a threaded fastener screwed onto the threaded end of the rod. Go side of rod stockpile piston is bounded by a step made on the stem Jl |.

Недостатком указанного соединени вл ет-, с ослабление опасного сеченн штока и Не| сока прочность резьбового соединени нз-за малого его диаметра.The disadvantage of this compound is, with the weakening of the dangerous sectional stem and He | Juice strength of the threaded connection is due to its small diameter.

Известно также соеднненне поршн со штоком , содержащее шток с кольцевой канавкой под пружинное кольцо и резьбовым окончанием , поршень с проточкой под пружинное кольцо , выполненной в сторону штоковой полости, фужиниое кольцо н резьбовой крепежный элемент , что в совокупности обеспечивает кр(Е;пленне поршн на штоке при двустороннем осевом нагружении соединени 2.It is also known to connect a piston with a rod containing a rod with an annular groove under the spring ring and a threaded end, a piston with a groove under the spring ring made toward the rod end, a fuzzy ring n a threaded fastener, which in total provides a cr (E; rod with bilateral axial loading of the connection 2.

Недостатком указанного соединени вл етс то, что оно не вл етс равнопрочный иThe disadvantage of this compound is that it is not equal and

надежным, так как канавка под пружинное кольцо попадает в опасное сеченне штока, а резьба на штоке не имеет необходимой прочностн из-за малого диаметра.reliable, since the groove under the spring ring falls into a dangerous section of the stem, and the thread on the rod does not have the necessary strength due to the small diameter.

Кроме того, во многих силовых цилиндрах 5 двустороннего нагружени , напрнмер в стойках механизированных крепей очистных забоев , рабочее давление в поршневой полостн больше , чем в штоковой, нз-2Э чего усилие, действуюш ,ее на пружинное кольцо, больше, чем jg усилие, действук щее на резьбу, тогда как пружннное кольцо менее прочно; чем резьба.In addition, in many power cylinders 5 of bilateral loading, such as in the racks of mechanized supports of working faces, the working pressure in the piston cavity is greater than in the rod, ns-2E, which force, acting on the spring ring, is greater than jg force, acting narrower thread, while spring ring less durable; than carving.

Цель изобретени - обеспечение равнопрочного и надежного соединени прн двустороннем нагруженин поршн .The purpose of the invention is to ensure equal and reliable connection of the double-sided piston loading.

Эта цель достигаетс тем, что кольцева проточка в поршне выполнена со стороны поршневой полости и на части внутренней поверхности со стороны торца поршн имеет резьбу под устанавливаемый в нее резьбовой крепежный элемент, торцова поверхность которого контактирует с торцом штока. Кроме того, кольцева проточка в поршне выполнена ступенчатой причем резьбовой участок проточки выполнен большего диаметра, чем участок под пружинное кольцо.This goal is achieved by the fact that the annular groove in the piston is made from the side of the piston cavity and on a part of the inner surface from the end of the piston has a thread for a threaded fastener installed in it, the end surface of which is in contact with the end of the rod. In addition, the annular groove in the piston is made stepped and the threaded section of the groove is made of a larger diameter than the area under the spring ring.

Claims

The drawing shows the proposed connection. It consists of a stem 1 with an annular f, v groove 2, piston 3, a spring ring 4, a supporting nut 5 are mounted on the rod. In the piston 3 there is a stepped annular groove b, forming a seating surface for the spring ring and a threaded surface for the supporting nut. The annular groove of the rod has a lead-in fascia 7 on the upper xpjpMKe 7. The support nut is made with an external thread and has a figured key hole. With the transfer of the threaded fastener from the rod to the piston in this connection, it is possible to increase the thread diameter to the required value, the spring ring and thread are rationally changed, the groove on the rod under the spring ring is removed in a non-hazardous section, the forced extension of the rod is eliminated and its design is simplified eliminates the possibility of damage to the seals during assembly. Claim 1. Compound piston with rod, for example, for a power cylinder, in which the piston is attached to the brush by means of a threaded fastener and a spring ring installed in the annular groove of the piston and the ring groove of the stem, reliable connection with two-sided loading of the piston, the annular groove in the piston is made from the side of the piston cavity and on the part of the inner surface from the side of the end of the piston e threaded fastener, the end surface of which is in contact with the end of the stem. 2. Connection according to claim 1, characterized in that the annular groove in the piston is made sintered, and the threaded section of the groove is made of a larger diameter than the section for the spring ring. Sources of information, taken into account prn examination: 1. USSR Author's Certificate number 395645, cl. F 6 J 1/12, 1971.

2. Raspopov V.I. and others. Switchboard unit 1АЩ. Donetsk, Donbass, 1973, p. 17, fig. 9.