Device for on-line monitoring mechanical characteristic of vacuum circuit breaker

The utility model discloses a device for on-line monitoring mechanical characteristics of a vacuum circuit breaker. An angular velocity sensor (5) is fixed on a mechanical frame (2) of a breaker, a sleeve (3) is fixed on a mechanical large shaft (1), an installing hole (7) is arranged on the sleeve (3), a connector (8) of the angular velocity sensor (5) is inserted into the installing hole (7), and a fastening screw (4) is fastened to realize linkage between the angular velocity sensor (5) and the mechanical large shaft (1). The angular velocity sensor is directly arranged in the breaker mechanism, the breaker does not need to exit from an operation system, and on-line mechanical characteristic monitoring of the breaker is realized. The device is simple and reliable in installation, and easy to realize.