Anti-falling device for jacking oil cylinder of tire type crane

Abstract

The invention relates to an anti-falling device for a jacking oil cylinder of a rubber-tired crane. The anti-falling device is characterized by comprising two compression spring sleeves, a sleeve seat and an anti-falling retaining ring, wherein the sleeve seat is an annular seat mounted at a bottom port of a cylinder body of the jacking oil cylinder in a sleeve manner; each of the two compression spring sleeves is movably mounted at the bottom on each of two sides of the annular seat in the radial direction of the cylinder body through a supporting sleeve in such a manner that each sleeve opening faces the center of the cylinder body; each compression spring sleeve consists of a sleeve body, a compression spring, a steel ball and a pressure adjusting nut, and each steel ball is propped against each compression spring and can move along each sleeve opening in a telescopic manner; the anti-falling retaining ring is a ring body fixedly arranged around an extension end of a piston rod; a convex declination upper slope, a middle vertical surface and a concave declination lower slope which are arranged continuously are arranged on the outer circumferential surface of the ring body, in the initial state that the piston rod retracts into the cylinder body, the steel balls are located on the lower side of the lower slope of the anti-falling retaining ring, and horizontal overlap distances between extension ends of the steel balls and the middle vertical surface of the anti-falling retaining ring are in a range of 5-20 mm; in the working state that the piston rod extends out, the steel balls are located above the anti-falling retaining ring.

Description

technical field [0001] The invention relates to a matching component for a tire-type crane, in particular to an anti-falling device for a jacking oil cylinder of a tire-type crane. Background technique [0002] Rubber-tyred cranes are lifting machines that travel on tires. Due to the large self-weight and lifting capacity, the tires are severely worn when turning. At present, the steering mechanism of the tire crane is equipped with a hydraulic jacking mechanism. The jacking mechanism uses a hydraulic cylinder, and the end of the piston rod passes through the ball end The connecting seat is connected to a support base. During normal walking, the tires touch the ground and the crane travels on the tires. At this time, the jacking cylinder is in the initial state, that is, the piston rod retracts to the cylinder and the support base is suspended from the ground. When the crane turns, the jacking cylinder is in the initial state. The oil cylinder enters the working state. Unde...

AI Technical Summary

Problems solved by technology

[0003] However, the defect of the existing jacking cylinder is that when the equipment is in use, the jacking cylinder will produce internal leakage, and the pressure will change, causing the suspended piston rod to fall naturally due to gravity, resulting in equipment failure. Therefore, how to prevent internal leakage of the cylinder? Causes the piston rod to drop, which has become a concern in the industry

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