Vibration fatigue testing machine for positioner

The invention relates to the technical field of accessory devices of electrified railway contact network systems, in particular to a vibration fatigue testing machine for a positioner. A testing withthe frequency of 1 to 3Hz and amplitude of 35 to 120mm to the positioner can be simulated under the +/-30% of rated working tension specified by railway industry standards. The testing machine comprises a test frame, a copper contact line, contact line terminal anchoring wire clamps, a stainless steel compensation rope, pulleys, double-lug wedge-shaped wire clamps, balance weight rods, balance weights, a linear reciprocating test mechanism and a positioned. The pulleys are fixedly arranged at the tops of the left end and the right end of the test frame; the stainless steel compensation rope issleeved on the pulleys; the stainless steel compensation rope is connected with the balance weight rods through the double-lug wedge-shaped wire clamps; trays are arranged at the bottoms of the balance weight rods; the linear