Rotating arc sensor

A rotating are sensor, comprising:

• a motor,
• a connecting rod for driving a welding gun to perform an annular movement,
• a first assembly for supporting a weight of the connecting rod and supporting a free movement of a first end of the connecting rod, and
• an oscillating member for driving a second end of the connecting rod to perform the annular movement, wherein
• a center of a rotating shaft of the motor is provided with a hollow cavity configured for communicating with both ends of the motor,
• the first assembly is disposed at a top end of the motor, and
• the first end of the connecting rod protrudes out of the top end of the motor through the hollow cavity and is connected with the first assembly;
• the oscillating member comprises a first flange and a second flange, wherein the first flange is sleeved over the rotating shaft of the motor and rotates with the rotating shaft, the second flange is disposed on the first flange, and a circle center of the second flange is offset from a circle center of the first flange;
• the second end of the connecting rod extends into the second flange and is connected with an inner wall of the second flange through a bearing assembly, and
• the second end of the connecting rod is provided with a second assembly for connecting with the welding gun,
• the first assembly comprises two sets of sliders, two sets of slide rails, a first mounting disc and a second mounting disc, wherein,
• the two sets of sliders are crosswise arranged at lower surfaces of the first mounting disc and the second mounting disc respectively,
• the two sets of slide rails are crosswise arranged at upper surfaces of the second mounting disc and the top end of the motor respectively and cooperate with the two sets of sliders,
• the first mounting disc is connected with the first end of the connecting rod, and
• the first mounting disc and the second mounting disc are disposed apart from each other in a vertical direction.