Pulley weighing device

The invention discloses a pulley weighing device. The pulley weighing device is characterized in that a weighing pulley is arranged on one side of a main structure of a crane through an adjustable support and is perpendicular to a top pulley, and the weighing pulley is adjusted to the tangent point position where a steel wire rope has the maximum extrusion force on the weighing pulley through the adjustable support and is then fixedly connected with the main structure through a bolt assembly so that a shaft pin type sensor can accurately determine the pull force of the steel wire rope after being calibrated. Compared with the prior art, the pulley weighing device is simple in structure, convenient to install and good in reliability; by adjusting the position of the pulley supporting seat, it is guaranteed that the steel wire rope extrudes the weighing pulley to the maximum all the time so that the shaft pin type sensor can accurately determine the pull force of the steel wire rope after being calibrated, weighing errors are small, the accuracy of a weighing result is guaranteed, the problem that the service life of a steel wire rope is short is well solved, and replacement and maintenance of the steel wire rope are facilitated.