Abstract: A magnetic oil injecting device is composed of a seat which is provided with an oil loop, a first groove, and an S-pole magnetic plate latched into the first groove; an oil package, whose outer periphery is provided with projection members and concave members, and which is provided with a top surface and a lower connection end connected to a concave part; and an N-pole magnetic plate which is attached to the top surface of oil package. By an effect of magnetic flux of the S-pole magnetic plate and the N-pole magnetic plate, a mutually attractive force is generated to create a compression motion to the oil package, so as to uniformly squeeze out oil, thereby eliminating a conventional way of using an external power, motor, piston, and mechanical transmission as an oil squeezing element.

Abstract: An axle bearing lubricating device includes a grease storage tank for providing lubricating grease to at least one grease propeller, the grease storage tank having a grease outlet, at least one grease propeller for propelling grease from the grease storage tank to a respective axle bearing, the at least one grease propeller each having a piston reciprocated to expel lubricating grease to a respective axle bearing, a manifold connected between the grease outlet of the grease storage tank and air holes on each grease propeller, and a high pressure system controlled to output high pressure air to the at least one grease propeller to reciprocate the piston in each grease propeller for enabling lubricating grease to be applied to each axle bearing.