Lubricating oil injection device for crane

The utility model provides a crane lubricating oil injection device and relates to the field of cranes. A box body is fixedly connected to the upper surface of the base, a first fixing block is fixedly connected to the upper surface of the box body, a groove is formed in the first fixing block, a first baffle is clamped in the groove, a motor is fixedly installed on the right side face of the box body through a fixing plate, and the output end of the motor is rotationally connected with a rotating shaft. The end, away from the motor, of the rotating shaft is rotationally connected with a wheel disc, and one side of the wheel disc is fixedly connected with a second sliding block. According to the crane lubricating oil injection device, a third fixing block and a piston plate conduct vertical piston movement, lubricating oil in the box body flows into an oil pump through a through hole in the surface of an oil outlet plate, and the injection speed and size are adjusted according to actual requirements when peop