Experimental machine for evaluating impact-loading type tribological performance of joint bearing

The invention relates to an experimental machine for testing the tribological performance of a joint bearing under the action of an impact load. The experimental machine comprises a transmission device, a loading device and a detecting device. A servo motor is connected with a torque meter through a first coupling and is connected with a supporting shaft through a friction-torque clutch. The upper end surface of an impact weight is fixedly connected with an impact-weight lifting cylinder, a load sensor is positioned below the impact weight, a load-sensor measuring head is contacted with the upper end surface of a force-transferring rod, a steady-load loading cylinder is connected with a loading rod, the loading rod is fixedly connected with the load sensor, the steady-load loading cylinder and the impact-weight lifting cylinder are connected with a hydraulic station through oil pipes, the lower end surface of the force-transferring rod is contacted with a bearing seat, a joint-bearing sample is installed on t