Middle cylinder block of hydraulic breaking hammer and manufacturing method of middle cylinder block

Abstract

The invention relates to the technical field of hydraulic breaking hammers, in particular to a manufacturing method of a middle cylinder block of a hydraulic breaking hammer. The middle cylinder block comprises a middle cylinder block body, wherein a piston cavity is longitudinally formed in the middle cylinder block body; an energy accumulator cavity and a control valve signal channel which communicate with the piston cavity are also formed in the middle cylinder block body; a reticulate pattern structure is uniformly distributed on the inner wall of the piston cavity and uniformly distributed in a whole inner cavity; the outer layer of the reticulate pattern structure is coated with a soft film; and the soft film covers the inner wall of the piston cavity. An original signal slot is eliminated, so that the amount, demanded by the signal slot, of hydraulic oil can be reduced, the structural strength of the middle cylinder block body can be enhanced, and the effect of preventing internal leakage can be achieved; the soft film has certain resilience, so that hard friction strain can be prevented; through the reticulate pattern structure, the adhesion of the soft film can be stronger; meanwhile, the soft film has the functions of adsorbing the hydraulic oil and increasing the timeliness of an oil film staying on the inner wall of the cylinder block; and due to the fact that the oil film is regarded as a main factor for supporting a piston in a vacuum environment of the inner cavity, the occurrence probability of cylinder scoring can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of hydraulic breakers, in particular to a cylinder body of a hydraulic breaker and a manufacturing method thereof. Background technique [0002] The hydraulic breaker is mainly loaded on the hydraulic excavator and loader, which converts the hydraulic energy into mechanical impact energy, relies on the hydraulic pressure to drive the piston to reciprocate, and drives the drill rod to achieve the breaking function. It has high operating efficiency and low energy consumption. Compared with traditional blasting , its noise is low, and it can be widely used in complex crushing and demolition environments, and is widely used in mining, building construction, metallurgical industry, road, railway and municipal engineering and other fields. [0003] With the expansion of breaker models, the difficulty of processing and production and the failure rate of products have also increased significantly. The faults are mai...

AI Technical Summary

Problems solved by technology

[0003] With the expansion of breaker models, the difficulty of processing and production and the failure rate of products have also increased significantly. The faults are mainly reflected in the phenomenon of cylinder scuffing. The phenomenon of cylinder scuffing refers to the friction between the piston and the middle cylinder, which causes the surface to be pulled into a pit shape. Or groove, causing hydraulic oil leakage, the breaker can not work normally;

[0004] In related technologies, in order to reduce the phenomenon of cylinder scuffing, the solution adopted is to add an annular lubricating groove in the middle cylinder body to avoid poor lubrication, or to install an energy storage device in the middle cylinder body to reduce the pressure in the middle cylinder body, thereby reducing the drag. However, the above arrangement either sacrifices the structural strength of the cylinder, or reduces the impact force, and cannot maintain the original performance of the hydraulic breaker.

Images