Quick-injection grease filling device

A quick-injection grease filling device, said quick-injection grease filling device being for assisting a user to fill grease into a roller unit structure of a bearing, the bearing including an inner frame part and an outer frame part;

• the quick-injection grease filling device including an oil cup, a detachable guide seat, a screw, a piston, an oppression part and a rotating drive part;
• wherein;
• the oil cup has a cup bottom, a cup mouth, and a straight inner peripheral wall between the cup bottom and the cup mouth, an inside of the oil cup defining an oil tank to hold the grease;
• the piston is housed inside the oil tank, the piston having an oppression surface, a bearing placement surface and a side ring surface connected between peripheries of the oppression surface and the bearing placement surface, wherein the bearing placement surface faces the cup mouth, and the oppression surface faces the cup bottom and is used to press down the grease, the bearing placement surface used for placement of the bearing so that the outer frame of the bearing presses the bearing placement surface downward, so as to define and form an enclosed and sealed grease filling margin, the side ring surface is fitted against the straight inner peripheral wall, capable of sliding, the center of the piston formed with a plurality of through-holes that go through the oppression surface and the bearing placement surface;
• the detachable guide seat includes a combination part and a screw hole, wherein the combination part is attached to the cup mouth of the oil cup through a detachable assembly unit, so that the screw hole of the detachable guide seat can maintain a fixed distance between the cup mouth of the oil cup and the cup bottom;
• the screw is screwed into the screw hole of the detachable guide seat to move forward and backward, the screw including an inner end and an outward extending end, the rotating drive part configured on the outward extending end, the oppression part configured on the inner end of the screw, so that the screw can move spirally forward and backward, with the screw hole of the detachable guide seat as a fixed supporting point, and the oppression part is used to press upon the bearing.