Cylinder body of a hydraulic breaker and its manufacturing method

Abstract

The present invention relates to the technical field of hydraulic breakers, and in particular to a method for manufacturing a middle cylinder of a hydraulic breaker. The accumulator chamber and the control valve signal channel connected with the piston chamber; among them, the inner wall of the piston chamber is evenly distributed with a textured structure, and the textured structure is evenly distributed throughout the inner cavity; the outer layer of the textured structure is coated with a soft film , the soft film covers the inner wall of the piston chamber. The invention cancels the original signal groove, reduces the demand of the signal groove for hydraulic oil, strengthens the structural strength of the middle cylinder body, and plays the role of preventing internal leakage; the soft film has a certain rebound ability, Prevent hard friction and strain; the textured structure makes the soft film more adhesive, and at the same time, the soft film can absorb hydraulic oil and increase the timeliness of the oil film staying on the inner wall of the cylinder, because the oil film is the support in the vacuum environment of the inner cavity The main factor of the piston effectively prevents the occurrence of cylinder scuffing.

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...

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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.

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