Brake with electricity generating device

The utility model relates to a brake with an electricity generating device. The brake comprises a brake body, wherein a motor cover body is arranged at the bottom end of the brake body; an electricity generating machine is arranged in the motor cover body; a machine body of the electricity generating machine is sleeved with a triangular bracket; the top end of the triangular bracket is hinged to the motor cover body through a double link mechanism; a tension spring is arranged between the electricity generating machine and the side wall of the cover body; a motor shaft of the electricity generating machine stretches out the motor cover body, and is connected with a runner in contact with the side wall of a wheel hub. The cover body can protect the electricity generating machine from being drenched and exposed in sunshine, so that the service life can be prolonged; through the arrangement of the tension spring, the condition that the runner is jointed with the side wall of the wheel hub is ensured, and the electricity generating work can be realized by utilizing rotating of the wheel in the vehicle proceeding process; through the arrangement of the triangular bracket, the adjustment of the electricity generating machine relative to the position of the wheel hub can be realized by the motor, and not only is the normal conducting of electricity generating ensured, but also the normal braking of the brake is not influenced. The device is simple in structure, strong in applicability, capable of realizing secondary utilization of energy, safe, reliable and environment-friendly.