Hydraulic breaker provided with automatic lubricant supply structure

A hydraulic breaker comprising:

• a bracket;
• a body coupled to an inside of the bracket;
• a piston provided in the body and reciprocating by a working fluid;
• a chisel provided in the body and configured to be hit by the piston;
• a cartridge coupler to which a lubricant cartridge is detachably directly coupled;
• a working fluid inlet connected to a hydraulic pump by a supply hose, wherein a high-pressure working fluid provided from the hydraulic pump through the supply hose flows into the working fluid inlet;
• a working fluid outlet connected to a hydraulic tank by a discharge hose, wherein a low-pressure working fluid discharged from the working fluid outlet through the discharge hose flows to the hydraulic tank;
• an automatic lubricant supply structure being configured to supply a lubricant from the lubricant cartridge using the working fluid;
• and
• a supply valve being configured to supply the lubricant to the lubricant injection port in response to a pressure of the working fluid,
• wherein the automatic lubricant supply structure comprises:
• a working fluid line disposed in the body, the working fluid line having one end communicating with the working fluid inlet and another end communicating with the supply valve;
• and
• a lubricant line disposed in the body and configured to supply the lubricant to the lubricant injection port, the lubricant line having one end communicating with the supply valve and another end communicating with the lubricant injection port.