Oil-Cooling Tube

An oil-cooling tube, comprising a set of inner and outer tubes molded of aluminum alloy, between which a heat sink having multiple heat-dissipating pores disposed thereon is laminated wherein, via tube-expanding process of the inner tube, the inner and outer tubes are integrally bonded with the heat sink together to form a lighter-weight oil cooling tube;

• multiple aluminum-alloy screw seats and aluminum-alloy end caps are respectively processed wherein the screw seats, each composed of a welding-joint portion disposed at the bottom and a protrusive hollow coupling end, can have the welding-joint portions respectively welded to bores drilled at the upper end sections of the outer tube to connect the hollow coupling end of the screw seats with the bores thereof, forming a set of oil-inlet and oil-outlet vents to which a set of oil-inlet and oil-outlet ducts are fluidly connected thereby;
• the end caps, each equipped with a ringed section to be welding-joined to the conjoining sections disposed at both outer end edges of the inner and outer tubes thereby, can seal and enclose the conjoining end edges of the inner and outer tubes to form an oil-reflux circuit therein, completing the manufacturing of the oil-cooling tube with the capability of heat dissipation wherein the oil-cooling tube is shortened in the processing steps and reduced in the cost of materials, benefiting the engine oil inside a transmission to achieve the best heat-dissipating effect thereby.