Pneumatic chipping hammer

A pneumatic chipping hammer, comprising:

• a handle part, the handle part being a hollow member;
• a main power part, one end of the main power part being connected to the handle part, and principal axes of the handle part and the main power part forming a certain angle between them;
• and
• a chisel part, the chisel part being detachably connected to another end of the main power part, wherein a direction of mounting of the chisel part on the main power part can be changed;
• wherein the handle part is provided with a first end and a second end which is opposite to the first end;
• wherein the main power part comprises a locking member and an air cylinder member;
• wherein the air cylinder member is provided with a third end and a fourth end which is opposite to the third end;
• and wherein the locking member is provided on an outer side of the fourth end of the air cylinder member, the locking member is connected to the air cylinder member via an elastic member and a lock member, and a circular groove is provided in the locking member and located below the lock member to make room for the lock member when the chisel part is disassembled and assembled.