Pure electric vehicle transmission system damping and noise-reducing device

The utility model discloses a pure electric vehicle transmission system shock absorption and noise reduction device which comprises a speed reducer and a transmission shaft connected with the speed reducer, and the output end of the speed reducer is in transmission connection with the transmission shaft through a spline connecting assembly and a flexible coupler which are coaxially arranged. The spline connecting assembly comprises an output outer spline arranged at the output end of the speed reducer and a sliding inner spline connected with the output outer spline in a matched mode. The flexible coupling comprises a first connecting flange fixedly connected to the outer end of the sliding internal spline and a second connecting flange fixedly connected to the input end of the transmission shaft, a flexible connecting disc is arranged between the first connecting flange and the second connecting flange, and the first connecting flange and the second connecting flange are coaxially andfixedly connected to the