Safe locking device for slide block moving vertically

Abstract

The invention discloses a safe locking device for a slide block moving vertically in the field of hydraulic machineries. The device comprises a hydraulic cylinder, wherein a piston rod of the hydraulic cylinder extends out of the lower end of the cylinder body of the hydraulic cylinder to connect the slide block; the piston rod is sleeved with a sleeve; the upper end of the sleeve is fixedly connected with the lower end of the cylinder body; the lower end of the sleeve is connected with a locking cylinder of which the inside is provided with a locking piston; the locking piston is provided with a small piston rod which upwards extends out of the upper end face of the locking cylinder; the inside of the sleeve is provided with a wedge-shaped retainer ring; a wedge-shaped fixture block matched with the wedge-shaped surface of the wedge-shaped retainer ring is arranged between the wedge-shaped ring and the piston rod; the upper end face of the wedge-shaped fixture block is provided with an elastic mechanism which pushes the wedge-shaped fixture block downwards; and the small piston rod is pressed against the lower end face of the wedge-shaped fixture block. When a system decompresses, the piston rod can be locked through the wedge-shaped fixture block so that the piston rod cannot move downwards, which improves safety and facilitates overhauling. The device can be used for various hydraulic machineries.

Description

technical field [0001] The invention relates to a protection device for a hydraulic machine tool such as a bending machine, a shearing machine, and a press, in particular to a safety protection device for a machine tool with a vertical movement of a slide block. Background technique [0002] Hydraulic machines such as bending machines, shearing machines, and presses are widely used in engineering as a kind of manufacturing equipment. Hydraulic machines are usually composed of upper beams, workbenches, sliders, and main cylinders. The main oil cylinder is installed on the upper beam. The lower end of the piston rod of the oil cylinder is connected to the slider through the flange. When the system is shut down or the system is unloaded, the piston rod will slide under the gravity of the slider (or heavy objects), causing accidents. Use an object to support the slider to prevent the slider from sliding down, which will bring a lot of trouble to the maintenance, and improper han...

AI Technical Summary

Problems solved by technology

[0002] Hydraulic machines such as bending machines, shearing machines, and presses are widely used in engineering as a kind of manufacturing equipment. Hydraulic machines are usually composed of upper beams, workbenches, sliders, and main cylinders. The main oil cylinder is installed on the upper beam. The lower end of the piston rod of the oil cylinder is connected to the slider through the flange. When the system is shut down or the system is unloaded, the piston rod will slide under the gravity of the slider (or heavy objects), causing accidents. Use an object to support the slider to prevent the slider from sliding down, which will bring a lot of trouble to the maintenance, and improper handling will cause equipment accidents and personal injury

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