Crusher

The utility model provides a crusher which comprises a machine shell, the machine shell is provided with a feeding port, a discharging port and a crushing cavity which are communicated with one another, the feeding port is located at the top of the machine shell, and the discharging port is located at the bottom of the machine shell; the hammer sheet assembly is rotatably mounted in the crushing cavity; the sieve plate is mounted on the inner wall of the crushing cavity; the vibrator is connected with the sieve plate, so that the sieve plate is driven to vibrate through the vibration of the vibrator; the first detection part is installed on the machine shell, the first detection part is in signal connection with the vibrator, a detection part of the first detection part is located in the crushing cavity so as to detect the flow and the quality of the to-be-crushed materials in the crushing cavity, and then the operation state of the vibrator is controlled according to the detection result of the first detecti