The earring structure integrates the two-way oil flow through the front and rear chambers and the pressure measurement and exhaust functions.

Abstract

The invention discloses a lug ring structure for integrating two-way oil passing of front and back cavities with pressure measurement and exhaust functions. The lug ring structure comprises a base, wherein a cylindrical boss is fixed at the lower end of the base; a ring is fixed at the upper end of the base; a through hole A and a through hole B are formed in the base; the apertures of the through hole A and the through hole B take the shape of steps with one large ends and one small ends; the large-diameter hole of the through hole A and the through hole B is an oil access port, and the small-diameter hole of the through hole A and the through hole B is a pressure measurement hole or an exhaust hole; a circular counter groove is formed in the center of the end surface of the boss; a main inclined hole leaded to the through hole A is formed in the bottom end of the counter groove, and is inclined to one side far from the through hole B; and a plurality of branch side holes leaded to the through hole B are formed in the end surface of the boss, and are distributed linearly or peripherally. The lug ring structure is compact, and wholly takes the shape of a mountain; the oil access port is integrated with the pressure measurement hole or the exhaust hole so as to reduce the volume of the lug ring and to improve the utilization rate of the lug ring; and meanwhile, the whole structure of a hydraulic cylinder is more compact, so that the duty ratio of the hydraulic cylinder and the production cost are reduced.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to an earring structure that integrates the functions of bidirectional oil flow through the front and rear chambers and the functions of pressure measurement and exhaust. Background technique [0002] Due to its compact structure and relatively small dimensions, the multi-stage telescopic cylinder can achieve a longer stroke than a single-stage cylinder in a host with a narrow installation space or a specific installation space, so it has been widely used in limited space . Due to the different positions of the oil inlet and outlet of the multi-stage telescopic cylinder, the internal structure of the multi-stage cylinder will be greatly different. For the multi-stage telescopic cylinder with earrings, due to the different positions of the oil inlet and outlet, it can be divided into: earring oil inlet and outlet type Multi-stage cylinder, cylinder barrel in and out oil ...

AI Technical Summary

Problems solved by technology

[0003] For the earring inlet and outlet oil-type multi-stage cylinder, because the two oil ports are in the earring, it can save the external high-pressure hose and facilitate the installation and fixing of the high-pressure hose, but the following main problems generally exist: : Due to the limited installation space, the earring Due to the need to process the oil circuit, part of the structure is relatively large, and the structural parts of the main engine are correspondingly enlarged, which affects the space; : the oil circuit is arranged inside the earring, which is easy to cause perforation leakage; : deep hole processing deviation, and other oil ports The oil hole is slender, the pressure loss along the way is large, and the flow rate is small, which cannot meet the flow demand of the main engine; There is no processing at the earring for pressure measurement and exhaust Holes make it difficult to test the cylinder and the gas in the cylinder cannot be removed. Cavitation is easy to occur during use and affects the service life of the seal.

The above shortcomings make this type of hydraulic cylinder have a high risk of failure, which reduces the overall safety factor of the main engine

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