CN2156348Y

CN2156348Y - Hydraulic oil cylinder

Info

Publication number: CN2156348Y
Application number: CN 93233044
Authority: CN
Inventors: 徐健光
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-13
Filing date: 1993-01-13
Publication date: 1994-02-16
Anticipated expiration: 2003-01-13

Abstract

The utility model relates to a hydraulic oil cylinder. At present, a hydraulic damping device is arranged on the hydraulic oil cylinder used for the construction with the cylinder of phi 100 millimeters above diameter. However, the hydraulic damping device has a complicated structure and is difficult to manufacture. No hydraulic damping device is provided with the hydraulic oil cylinder with the cylinder of phi 100 millimeters below diameter. The utility model provides a hydraulic oil cylinder of simple structure with a damping device. The utility model is characterized in that fixed pistons and moving pistons are arranged on the piston rods. A unique lubricating groove is arranged in the center of the left end of the piston rods, which is provided with a valve core and a spring.

Description

Hydraulic oil cylinder

The utility model relates to a kind of hydraulic jack.

At present, have only cylinder diameter just to establish hydraulic damping device more than 100 millimeters at normally used hydraulic jack on the engineering at φ, and the damping device complex structure, be difficult for making, the cost height, and cylinder diameter does not design damping device at the hydraulic jack of φ below 100 millimeters owing to be subjected to the restriction of size.

The purpose of this utility model is to provide a kind of hydraulic jack with damping device.Particularly cylinder diameter is with the hydraulic jack of damping device below 100 millimeters at φ.

The purpose of this utility model is achieved in that it comprises the oil cylinder overcoat, left end body, guide sleeve, piston rod.It is characterized in that also comprising fixed piston and sliding piston, sliding piston is contained on the piston rod, with cooperating of piston rod for movingly, on sliding piston, be drilled with axial oilhole, left end center at piston rod is drilled with oilhole vertically, and be provided with spool and spring, on piston rod, also be drilled with the radial direction oil hole that communicates with axial oilhole.

The utility model is simple in structure, is convenient to make, and reliable performance, cylinder diameter can be at φ more than 100 millimeters, also can be at φ below 100 millimeters.

Below in conjunction with accompanying drawing its structure is further described:

Fig. 1 is a structural representation of the present utility model.

The utility model comprises oil cylinder overcoat (1), left end body (2), guide sleeve (3), piston rod (4), on piston rod (4), be fixed with fixed piston (5) and movable piston (6) is housed, cooperating between movable piston (6) and the piston rod (4) for movingly, can go up at piston rod (4) and slide, on movable piston (6), be drilled with oilhole (7) vertically, be drilled with oilhole (8) vertically at the left end center of piston rod (4), radially be drilled with oilhole (9), oilhole (8) and oilhole (9) conducting also are provided with spool (10) and spring (11) at the left end of piston rod (4), and spool (10) is when left end moves, can rely on the conical surface on it that passage (8) and (9) are sealed, oil can't be passed through.

Working principle of the present utility model is as follows, when pressure oil P1 enters the active chamber I, enter the cavity II simultaneously, movable piston (6) is moved to right to be resetted, close oilhole (9), after piston rod (4) starts, spool (10) resets under the effect of spring (11), closed the oil circuit that leads to the III chamber, at this moment piston rod (4) enters working stroke and moves right, and when moving to end points, movable piston (6) is collided with guide sleeve (3), movable piston (6) is collided slowly to move to left, at this moment, the hydraulic oil in the IV chamber has played the lubricating pad effect and oilhole (9) is communicated with the III chamber, and at this moment the pressure oil P1 in I chamber pushes spool (10) open, make I chamber and the intercommunication of III chamber, play buffer function.When pressure oil P2 enters the III chamber, the oil return of I chamber, movable piston (6) is moved to the left, and opens oil circuit (9), at this moment, because the effect of pressure oil P2, spool (10) is closed, and when moving to the left end terminal point, spool (10) is collided out, buffer function is played in the pressure oil and the intercommunication of I chamber in III chamber at this moment.

Claims

The utility model relates to a kind of hydraulic jack, it comprises oil cylinder overcoat (1), right-hand member body (2), guide sleeve (3), piston rod (4), it is characterized in that on piston rod (4), being fixed with fixed piston (5) and movable piston (6) is housed, cooperating between movable piston (6) and the piston rod (4) for movingly, on movable piston (6), be drilled with oilhole (7) vertically, be drilled with oilhole (8) vertically at the left end center of piston rod (4), radially be drilled with oilhole (9), oilhole (8) and oilhole (9) conducting also are provided with spool (10) and spring (11) at the left end of piston rod (4).