Extrusion type self-lubricating internal gear

The utility model discloses an extrusion type self-lubricating internal gear which is characterized in that teeth are arranged on the inner surface of the internal gear, an oil cylinder used for storing oil, an extrusion block used for extruding the oil cylinder, a partition plate used for sealing the oil cylinder, a spring used for supporting the partition plate and the extrusion block and an oil absorption piece are arranged in the teeth, and the oil cylinder is arranged in the teeth. The partition plate is transversely connected into the oil cylinder, the extrusion block is connected into a through hole preset in one side of the oil cylinder and connected with the partition plate, the spring is located on one side of the partition plate, one end of the spring is connected with the partition plate, and the other end of the spring is connected with the inner wall of the oil cylinder. The rotating speed of the gear does not need to be increased, so that abrasion of the gear cannot be accelerated, and the tran