Servo welding gun with air cylinder protective device

The invention relates to a servo welding gun with an air cylinder protective device. The servo welding gun comprises a servo air cylinder (1) and an electrode stem (2) connected with a piston rod (11) of the servo air cylinder (1), wherein the electrode stem (2) is arranged above the servo air cylinder (1); and a protective cover (3) for preventing a cooling liquid in the electrode stem (2) from flowing into the servo air cylinder (1) is arranged on the piston rod (11). Compared with the prior art, the servo welding gun has the advantages of being simple in structure, low in cost, safe and reliable, capable of effectively preventing cooling water from damaging the structure of the air cylinder, free of interference on original equipment, and the like. 本发明涉及种带有气缸防护装置的伺服焊枪，包括伺服气缸(1)及与伺服气缸(1)的活塞杆(11)连接的电极杆(2)，电极杆(2)设置在伺服气缸(1)的上方，活塞杆(11)上设有用于防止电极杆(2)中的冷却液流入伺服气缸(2)内部的防护罩(3)。与现有技术相比，本发明具有结构简单、成本低廉、安全可靠、能够有效防止冷却水损坏气缸结构、不会对原有设备产生干涉等优点。