A foreign matter attracting structure includes: an attracting body for attracting foreign matter in lubricating oil, wherein the attracting body includes a magnet and a capturing body which is composed of a weakly magnetic material, and the capturing body is disposed at a position which is magnetized by a magnetic force of the magnet.

A drive unit is disclosed that includes case portions, a gasket interposed between the case portions, shafts, bearings having respective bearing races, and a bearing shim plate. One shaft includes an input oil tube which provides a fluid pathway between the bearing shim plate and a rotor of the drive unit. Interposed between bearings, and the bearing shim plate, are shims. An approach for sizing shims for use with a drive unit is also disclosed, the approach including determining the distance from a mating flange of a case portion, to different bearing races, selecting shims based on the determined distances, and attaching the bearing shim plate to the case portion with shims interposed therebetween.

A gear box and method of providing oil through the same is provided. The gear box includes a windage tray that includes a tray having a bleed hole therein, and another tray having another second bleed hole therein. Oil is provided through the bleed holes to respective gears situated in the trays. The windage tray may also include a magnet positioned within a magnet slot of the windage tray, for removing debris from the oil. A tube may also be attached to the windage tray, which tube can include a bleed hole therein, for spraying the oil out of the tube and towards a differential, for example. The windage tray and tube can be made from molded plastic, and can be made using the same mold. The gear box housing may further define a drain in an inner side wall to provide oil to a differential bearing, for example.

Systems and method for cooling and lubricating power transmission systems include providing oil to an oil tube and then to a rotor shaft via the oil tube. Oil may also be provided through at least one channel defined in an end of the oil tube inserted into an annular region of the rotor shaft, through at least one channel defined in an end of the gear shaft and between the end and a shoulder of the rotor shaft and through at least one channel defined in side surface of the rotor shaft in a region of rotor shaft inserted into the gear shaft. Such systems and method can also include providing oil a fluid passageway in a bearing shim plate via an inlet tube. Oil may also be provided through a radial gap adjacent a bearing shim plate outlet and chamber defined in the bearing shim plate.

Systems and methods for cooling power transmission systems are include providing oil through an aperture defined in a housing to a stator cooling ring, through the stator cooling ring and into stator cooling channels, through the stator cooling channels and into spaces defined between the housing and jet rings, and through holes in the jet rings and onto the end-windings. The stator cooling ring, stator cooling channels and jet rings can encircle the stator and end-windings and, via the holes in the jet rings, spray pressurized jets of oil from various angles onto the end-windings, and in particular middle regions thereof. Seals may be used between the jet rings and housing, and between the jet rings and stator ends. The seals may be compressed so as to form an interference fit between the jet rings and housing or stator ends as the case may be.

An electric drive unit and method of assembling the same is disclosed. The electric drive unit includes a rotor having a rotor shaft, and gear shaft, where the rotor shaft is inserted into the gear shaft. The gear shaft is supported by two bearings, while the rotor shaft supported directly at one end by a bearing and at the other by the gear shaft. A wave spring is also disclosed that provides an axial loading to the rotor shaft. Also disclosed is a balancing ring secured to an end of the rotor via a locknut. The balancing ring can be machined in order to balance the rotor. The rotor shaft can be connected to the gear shaft via a spline connection. The rotor shaft can bear against the gear shaft via a pilot journal and pilot bore defined on the rotor shaft and gear shaft respectively.

The invention relates to a system and process for removing hardened lubricant, contaminants and other debris from an enclosed gearbox of an actuator in the gas, oil, and power industries that allows the oil or gas pipeline to continue to operate uninterrupted during servicing. The system operates at a low pressure and includes two pumps: an upstream pump that pumps a non-corrosive mineral oil-based cleaning agent into the gearbox; and a downstream pump that pulls off the pressure from within the gearbox as part of the circulation of the flush system. The system and process are further provided with a clean tank for storing an influent cleaning agent, a waste tank for storing an effluent cleaning agent, and a circulation tank used during the flush circulation process. The system and process may also include a rotatable mounting assembly that is secured to the gearbox of the actuator.

An axle assembly having a dam module. The dam module may include a dam, an upper brace, and a lower brace. The dam may be at least partially disposed in an arm portion of a housing of the axle assembly. The upper brace and the lower brace may be disposed proximate the dam. The upper brace may transport lubricant to the dam.

A moving body driving unit includes: a casing; an electric motor placed in a motor storage portion formed in an inner side of the casing on one side in a first direction which is predetermined and that has a motor shaft which extends in the first direction; a gear device placed in a gear storage portion formed in the inner side of the casing on the other side in the first direction and which also functions as an oil reservoir; a motive power transmitting mechanism placed at the inner side of the casing and that transmits motive power between the motor shaft and the gear device; an oil passage that interconnects the motor storage portion and the gear storage portion at the inner side of the casing; an oil introduction port; an oil discharge port; and an external oil path.

A gear assembly is provided. The gear assembly includes a first gear that rotates about a first axis and includes a first gear face with a plurality of first gear teeth; a second gear that rotates about a second axis and includes a second gear face with a plurality of second gear teeth, where the first axis is not parallel with the second axis and the first and second teeth rotatably engage as the first gear rotates about the first axis and the second gear rotates about the second axis; a scraper that includes a distal interference surface in face-to-face proximity with at least one of the first plurality of teeth as the first gear rotates about the first axis, where the interference surface removes oil entrained adjacent to the plurality of first or second gear teeth as the first or second gears rotate.