The present invention relates to a safety device of a hydraulic jack and, more specifically, to a safety device of a hydraulic jack, capable of preventing surrounding pollution caused by exposure to fluids, specifically returning fluids discharged in the case of high internal pressure into a cylinder without discharging the fluids to the outside, and eliminating the need for repair work for the replenishment of fluids by preventing the loss of fluids. The safety device of a hydraulic jack comprises: a pressure chamber (26) formed in a piston (20) reciprocating in a cylinder, in a longitudinal direction; a finishing cap (32) fixed to one side of the pressure chamber (26) in the direction of a stroke chamber (12) where a first fluid passage (14) of the cylinder exists, and having at least one outlet (33); an inflow channel (24) connected to a fluid chamber (12a) where a second fluid passage (16) of the cylinder exists, on the other side of the pressure chamber; an opening and closing ball (40) installed in the pressure chamber to block the inflow channel (24); and a pusher (36) elastically supported by a spring (38) between the finishing cap (32) and the opening and closing ball (40).

    본 발명은 유압잭의 안전장치에 있어서, 내부에 고압발생시 배출되는 유체가 외부로 유출되지 않고 실린더 내부로 복귀됨에 따라 유체노출에 의한 주위오염됨을 방지할 수 있으며, 유체의 손실이 없어 유체보충을 위한 수리작업이 불필요한 유압잭의 안전장치를 제공하기 위하여, 실린더의 내부에서 왕복이동하는 피스톤(20)의 내부에 길이방향으로 형성된 압력실(26)과, 상기 실린더의 제1 유체통로(14)가 있는 행정실(12) 방향으로 압력실(26) 일측에 고정되며 하나 이상의 배출구(33)를 가진 마감캡(32)과, 상기 압력실의 타측에는 실린더의 제2 유체통로(16)가 있는 유체실(12a)로 연결되는 유입로(24)와, 상기 압력실 내부에 설치되어 유입로(24)를 차단하는 개폐볼(40)과,상기 마감캡(32)과 개폐볼(40) 사이에 스프링(38)에 의해 탄지되어 있는 푸셔(36)로 구성된다.


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    Title :

    SAFETY DEVICE FOR HYDRAULIC JACK


    Additional title:

    유압잭의 안전장치


    Contributors:

    Publication date :

    2021-03-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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