The utility model provides a constant voltage delivering oil tubulose riveting formula roller pump pump body subassembly. The current roller pump of main solution is fixed a position difficulty, installation trouble, is had the problem of becoming flexible hidden danger. Its characterized in that: the sleeve inner wall is equipped with a plurality of vertical location muscle uniformly, oil feed board, eccentric driven pump circle, play oiled -plate method excircle are equipped with and fix a position the constant head tank of muscle adaptation, be equipped with round location step in the sleeve, oil feed board and location step laminating, the sleeve is inwards buckled through the riveting and is fixed the oiled -plate method. Its advantage lies in through the mutually supporting of location muscle and constant head tank, can be very easily to oil feed board, eccentric driven pump circle, the oiled -plate method installation of counterpointing goes out, can lock its position by furtherly in addition, simultaneously through the fixed oil feed board of riveting, the pump body, play oiled -plate method, for original bolt fastening mode, not only the operation install more conveniently, can not become flexible the good reliability in addition.