Built-in forced lubricating system of rocker arm of coal mining machine

The invention provides a built-in forced lubricating system of a rocker arm of a coal mining machine, which aims at solving the technical problem that when the rocker arm of the coal mining machine is operated in an upper oscillation angle position, a bearing and a gear at the upper end of the rocker arm can not be well lubricated, the bearing and the gear are severely worn out, and the service life is greatly shortened. The built-in forced lubricating system has the key points that a forced lubricating gear pump is arranged in the rocker arm, and a driven gear arranged on the input shaft of the pump is meshed with a driving gear arranged on the output gear of a motor. When the motor of the rocker arm of the coal mining machine rotates, the driving gear, the driven gear and the gear pump rotate in sequence to feed lubrication oil to the gear and the bearing at the head at the upper end of the rocker arm, therefore, the service life is greatly prolonged.