Abstract: Systems for an electric drive axle of a vehicle are provided. In one example, an electric drive axle system includes a gear box including a plurality of gear ratios. The plurality of gear ratios includes a fixed center distance measured from a carrier to an axle on which a plurality of gears or a plurality of pinions is arranged. Each pinion of the plurality of pinions is differently sized, wherein all pinions except for a largest pinion include a pinion baffle. Each gear of the plurality of gears is differently sized, wherein all gears except for a largest gear include a gear baffle.

Abstract: A transmission for a motor vehicle includes an electric motor and a flexible traction drive mechanism which includes a first traction mechanism wheel, such as, a gear or pulley, which is rotationally fixed to a rotor shaft of the electric motor, a second traction mechanism wheel which can be rotationally fixed to a transmission component and which is drivingly connected to the first traction mechanism wheel by a traction mechanism, such as, a belt or chain, and a bearing journal for supporting the first traction mechanism wheel. An oil line extends through the bearing journal, and oil can be fed to the electric motor via the oil line.

Abstract: An arrangement for lubricating a gear in a toothed gearing comprising a shaft on which the gear is arranged is provided. An engaging ring with a central portion is arranged around said shaft and comprises a surface facing and spaced from an end surface of the gear creating a gap for guiding lubricant to the gear, and at least one first duct for lubricant, whereby said duct has at least one opening into the gap. The component comprises an annular portion with an inner peripheral surface mounted onto an outer peripheral surface of a shoulder on the gear; where axial discontinuities are provided between the shoulder and the annular portion of the component for guiding and distributing lubricant to the roots of the gear.

Abstract: A planetary gearbox having a sun gear, a plurality of planet gears, a ring gear, and a plurality of journal bearing pins. At its axially forward face side and/or at its axially rearward face side, each planet gear forms a recess that extends inside the planet gear starting from the face side. The planet gear forms a protrusion at its axially forward face side and/or at its axially rearward face side. The protrusion has an axial extent and a radial extent, wherein the radial extent is limited at the respective face side to the area between the planet gear inner bore and the radial inner limit of the respective recess in the planet gear, and wherein the protrusion is configured to provide for a flow path for oil emerging from the journal bearing that guides the oil away from the journal bearing.

Abstract: A transmission device includes a casing accommodating a transmission gear and having an oil sump for retaining oil. The oil in the oil sump flows from a lubrication pump through a lubrication passage and is injected to the transmission gear. A connection portion is provided in a part of the lubrication passage, which part is disposed outside the casing. A direction control valve is provided downstream of the lubrication pump and upstream of the connection portion in the lubrication passage with respect to a flow direction of the oil. The direction control valve is configured to open the lubrication passage when a hydraulic pressure in the lubrication passage exceeds a predetermined value and to close the lubrication passage when the hydraulic pressure is equal to or lower than the predetermined value.

Abstract: A lubrication distribution system is provided for mechanical systems, including gearboxes, to evenly and precisely apply lubricant to system structures during operation. The system includes a rotating lubrication distribution component that functions both to pump and to precisely direct lubricant. Machined locator elements enable accurate positioning of the rotating lubrication distribution component within the system. A plurality of lateral ports and surface features in the rotating lubrication distribution component receive and distribute lubricant transferred during rotation from one or more lubricant collection components with profiled lubricant transfer elements that enables collection of lubricant from eddies produced by profiles of the lubricant transfer elements during rotation of the rotating lubrication distribution component.

Abstract: An electric vehicle transmission mechanism which is applied to drive a chain wheel of an electric vehicle is provided. The electric vehicle transmission mechanism includes a transmission shaft, an output shaft, a lower bearing and an upper bearing. The transmission shaft is connected to the chain wheel and has a transmission axial direction, and the transmission shaft includes a transmission portion. The output shaft includes an output portion engaged with the transmission portion, and the output shaft has an output axial direction substantially perpendicular to the transmission axial direction. The lower bearing is sleeved on the output shaft. The upper bearing is sleeved on the output shaft and located between the lower bearing and the output portion.

Abstract: Disclosed is a driving system having an oil circulation structure in which churned oil is collected in a housing and in which the collected oil is efficiently distributed to driving structures, which include a motor and a speed reducer, thereby smoothly cooling and lubricating the respective driving structures. In addition, it is possible to adjust the level of the oil depending on whether the driving structures are in a low-load state or a high-load state, thereby improving lubrication and cooling performance.

Abstract: A drive device includes a first catch tank above a first gear and including a first bent portion bent between the first gear and a second gear, and a second catch tank below the first catch tank and including a second bent portion that is bent downward. A space above the second bent portion communicates with a space above the first bent portion. A third catch tank is above the second gear, and includes a third bent portion that is bent toward between the first gear and the second gear. A space above the third bent portion communicates with the space above the first bent portion. A fourth catch tank is in front of the second gear and above the third gear, and includes a fourth bent portion that is bent downward.

Abstract: A transmission lubrication system for a vehicle providing a continuous return flow of a lubricant. The transmission lubrication system includes a differential housing, a transmission housing, a lubricant tank, a suction line, a lubricant pump, and an air suction pump. The transmission housing is connected to the differential housing in an air-tight manner and a lubricant through-passage is provided between the transmission housing and the differential housing. The lubricant tank is provided in the differential housing and has a lubricant suction opening in a lower region. The lubricant pump conveys lubricant from the lubricant tank through the suction line and conducts the lubricant to the lubrication points in the differential housing and transmission housing. The air suction pump pumps air from the lubricant tank into the transmission housing so that an excess air pressure is maintained in the transmission housing.

Abstract: A transmission includes a first oil reservoir and a second oil reservoir. The first oil reservoir, in an installed position, lies underneath the second oil reservoir. The first oil reservoir and the second oil reservoir are connected via a connection line. The connection line is configured to open or close depending on an oil level in the first oil reservoir. A related motor vehicle is also provided.

Abstract: An assembly for a compartment of a gas turbine engine that includes a housing, a gear, and a baffle disposed about the gear. The baffle includes an upstream portion and a downstream portion. The upstream portion includes an upstream inner wall and an upstream outer wall separated from the gear. The upstream inner wall is positioned between the upstream outer wall and the gear. An upstream flow channel is formed between the upstream inner wall and the upstream outer wall. The downstream portion of the baffle includes a downstream inner wall and a downstream outer wall separated from the gear. The downstream inner wall is positioned between the downstream outer wall and the gear. A downstream flow channel is formed between the downstream outer wall and the downstream inner wall.

Abstract: A vehicle drive apparatus includes: a first bearing disposed between a rotor support member and a case in a radial direction so as to restrict movement of the rotor support member to a first axial side relative to the case; and a second bearing disposed between a connecting shaft and the case in an axial direction so as to restrict movement of the connecting shaft to a second axial side relative to the case. A fluid transmission device is disposed on the first axial side relative to the connecting shaft. The rotor support member includes a tubular portion having a tubular shape extending in the axial direction and fitted to an outer peripheral surface of the connecting shaft. Movement of the connecting shaft to the first axial side relative to the tubular portion is restricted.

Abstract: A vehicle drive-force transmitting apparatus including: a casing provided with an oil supply hole; a pump for pumping out an oil stored in the casing; and a pipe for delivering the oil pumped out by the pump, such that the oil discharged from the pipe is supplied to the oil supply hole. The oil is to be discharged from the pipe collides with an oil collision portion which is a portion of the casing and which is located on an upper side of the oil supply hole. The casing includes a guide portion and a block portion. The guide portion is located on a lower side of the oil collision portion, so as to guide the oil discharged from the pipe toward the oil supply hole. The block portion is located to surround the oil collision portion, so as to block the oil splashing from the oil collision portion.

Abstract: A scroll device includes a fixed scroll with an idler shaft bearing, an orbiting scroll with another idler shaft bearing; and an eccentric idler shaft having first and second arms extending in opposite directions and ending at first and second ends, the first and second arms supported by the fixed scroll idler shaft bearing and the orbiting scroll idler shaft bearing, respectively. The eccentric idler shaft has a hollow core extending from the first end to the second end, with at least one channel extending through the first arm and enabling fluid communication between the hollow core and the at least one first bearing, and at least one second channel extending through the second arm and enabling fluid communication between the hollow core and the least one second bearing.

Abstract: A vehicular power transmitting system including a power transmitting member, an oil pump, and an oil piping assembly, and the oil piping assembly includes an oil piping body having an oil inlet and fixed, and a branch pipe. The branch pipe has a width direction parallel to a longitudinal direction of the oil piping body, and includes proximal and distal end portions. The proximal end portion is connected to the oil piping body, and the distal end portion has a delivery nozzle from which the oil is delivered toward the lubricated portion. The branch pipe has an opening formed in the proximal end portion, for communication of the branch pipe with the oil piping body, the opening having a dimension in a width direction of the branch pipe, which dimension is larger than a dimension of the distal end portion in the width direction of the branch pipe.

Abstract: A planetary gearing includes at least a first planetary stage and a second planetary stage and a double-walled pipe. The double-walled pipe has an inner pipe and an outer pipe and is provided with an outlet point in a central section. A bushing is arranged on the outlet point.

Abstract: In order to enable efficient operation and reliable heat dissipation in a transmission, a pumping device (10) for lowering the internal pressure in a transmission (100) is equipped with a suction line (18), which leads from a suction point (20) on a connection side (14) to a discharge point (22) on a discharge side (16), a pump (24) for generating negative pressure at the suction point (20), a pump drive (26) for driving the pump (24), and an oil separator (28) connected upstream or downstream of the pump (24) in the suction line (18) that separates oil contained in the suction flow and returns it via a return line (30) to the connection side (14), and a check valve (34) connected downstream, preferably directly downstream, of the pump (24). A transmission (100) with such a pumping device (10), a use of a pumping device (10) and a method for reducing power losses in a transmission (100) are disclosed.

Abstract: The continuously variable transmission includes a transmission case having a side cover, a housing, and a case sandwiched between the side cover and the housing, an oil pump disposed in the transmission case, and a pair of gears disposed in the transmission case. An axial rib having a linear shape extending from the side cover toward the housing is formed on an outer wall surface of the case at a position adjacent to the pair of gears. The axial rib is positioned on a straight line extending from the oil pump in the vertical direction and is locally positioned at a position where the meshing reaction force of the pair of gears is suppressed.

Abstract: In certain embodiments, land vehicles are provided as delivery vehicles and/or utility vehicles. A land vehicle includes a frame structure having a front cage that defines an operator cabin and a rear floor positioned rearward of the front cage. The frame structure supports a plurality of wheels to permit movement of the vehicle relative to an underlying surface in use of the land vehicle. An underside of the frame structure is disposed in confronting relation with the underlying surface.

Abstract: A transmission includes a housing, a plurality of components, and a cooling system. The housing has a plurality of walls that cooperate to define an interior space and a sump configured to store lubricating fluid in use of the transmission. The plurality of components are arranged in the interior space and configured to cooperatively transmit rotational power between an input shaft and an output shaft of the transmission to reduce a rotational speed of the output shaft relative to a rotational speed of the input shaft in use of the transmission. At least one of the plurality of components is supplied with lubricating fluid stored by the sump in use of the transmission. The cooling system is supported by the housing.

Abstract: A housing for a drive system. The housing defines a motor cavity, an electronics cold plate, an oil cavity, and a coolant cavity. The coolant cavity defines a first coolant flow path configured to provide cooling to the motor cavity and the oil cavity. The coolant cavity defines a second flow path configured to provide cooling to the motor cavity and the cold plate. The housing defines a coolant inlet and a coolant outlet fluidically coupled to the first coolant flow path and the second coolant flow path, such that the first coolant flow path and the second coolant flow path are parallel fluid paths. In some applications the coolant paths can be connected in series. In some examples, the housing is configured to cause a counter-flow heat exchange between an oil flowing in the oil cavity and a coolant flowing in the first coolant flow path.

Abstract: A method of assembling an epicyclic gear train includes positioning a carrier, the carrier being a unitary structure with side walls and mounts unitary with one another, inserting intermediate gears through a central opening of the carrier, moving each of the intermediate gears into intermediate gear pockets, inserting baffles into the carrier, inserting a sun gear through the central opening, and moving the intermediate gears to intermesh with the sun gear, and moving a ring gear into engagement with the intermediate gears.

Abstract: A drive pinion of an air/oil separator of an accessory gearbox of a turbomachine, the air/oil separator being configured to be supplied at the input by an air flow to de-oil and to supply at the output, on the one hand, a de-oiled air flow and, on the other hand, an oil flow by centrifugation, the pinion being configured to drive the separator rotationally along an axis of rotation, the pinion being mounted facing a passage opening of the separator, the pinion comprising at least one guiding opening traversing the web plate defining at least one guiding surface inclined with respect to the axis of rotation in such a way as to guide along the axis an air flow to de-oil into the separator or a de-oiled air flow out of the separator via the guiding opening of the pinion.

Abstract: The present invention relates to an auxiliary transmission brake arrangement (100) for a transmission (10) of a vehicle. In particular, the invention relates to an auxiliary transmission brake arrangement comprising a lubrication arrangement for improved lubrication of gear wheels connecting the auxiliary transmission brake arrangement to an output shaft.

Abstract: A system for lubricating components of a gas turbine engine includes a supply pump to pump lubricant from a reservoir through a supply conduit to lubricated component. An outer body deicing circuit is fluidly coupled in series with the supply conduit. Moreover, a scavenge conduit extends from the lubricated component to the reservoir and a scavenge pump pumps the lubricant from the lubricated component through the scavenge conduit. In addition, a valve is fluidly coupled in series with the supply conduit and the scavenge conduit and a bypass conduit extends from the valve to a location on the supply conduit downstream of the deicing circuit. When the lubricant is supplied to the valve, the valve directs the lubricant flowing through the scavenge conduit into the reservoir. When the supply of lubricant to the valve is halted, the valve directs the lubricant flowing through the scavenge conduit into the bypass conduit.

Abstract: An electric drive can comprise a housing assembly; an electric machine with a hollow shaft; a planetary gearing; and a power distribution unit having an input part and two output parts, the input part being connected to the planet carrier, one of the output parts being connected to an intermediate shaft extending through the hollow shaft; wherein the housing assembly comprises a motor-sided first housing part, a gearing-sided second housing part, and an intermediate housing part disposed therebetween, wherein the intermediate housing part includes, integrally formed, an intermediate wall, a motor-side jacket portion and a gearing-side jacket portion, wherein a sealed cavity for a coolant flowing therethrough is formed between an outer face of the motor-side jacket portion and the inner face of the first gearing part.

Abstract: A vehicle driveline component includes a hollow motor shaft and a link shaft. The hollow motor shaft is supported for rotation about an axis including a plurality of grooves extending along an interior surface of the motor shaft. The link shaft cooperates with the interior surface of the motor shaft and the grooves to define a space between the link shaft and the motor shaft. The grooves are configured to force liquid lubricant to flow through the space in a longitudinal direction relative to the link shaft and the motor shaft when the motor shaft rotates. The link shaft includes a lubricant passage, a first connecting lubricant passage, and a second connecting lubricant passage. The lubricant passage extends along a longitudinal direction of the link shaft. The first and second connecting lubricant passages provide fluid communication between the longitudinal lubricant passage and the space.

Abstract: An epicyclic gear system includes a sun gear, a ring gear, and two or more star gear assemblies enmeshed between the sun gear and the ring gear. Each star gear assembly includes a star gear and a journal bearing supportive of the star gear. The journal bearing includes one or more lubricant passageways to deliver a flow of lubricant to a selected location of the star gear assembly, wherein a first cross-sectional area of a lubricant passage of a first journal bearing of the two or more star gear assemblies is greater than a second cross-sectional area of the corresponding lubricant passage of a second journal bearing of the two or more star gear assemblies.

Abstract: An input shaft includes an annular main shaft extending along a longitudinal axis with an internal bore configured for fluid flow through the annular main shaft. A generator spline is included on an exterior surface of a first end of the main shaft. A gearbox spline is included on an exterior surface of a second end of the main shaft opposite the first end. At least one orifice is defined through the main shaft from the internal bore to the exterior surface of the second end of the main shaft for flow of fluid from the internal bore to the exterior surface for cooling and lubrication.

Abstract: An assembly includes: a fan drive reducing gear of an aircraft turbine engine, and a lubrication system including: a housing enclosing the reducing gear; a device for spraying lubricant onto the reducing gear; a lubricant supply pipe intended to convey the lubricant towards the spraying device; a lubricant recovery pipe communicating with a bottom of the housing; a controlled valve equipping the recovery pipe; and a lubricant overflow discharge pipe connected to an overflow outlet of the bottom of the housing situated above a horizontal level of a bottom point of a gearing of the reducing gear, and to the recovery pipe, downstream from the valve.

Abstract: A pressing device for a toroidal continuously variable transmission, comprises: a disk having a toroidal curved surface and a first cam surface; a cam plate having a cylindrical portion, and an outward facing flange portion having a second cam surface; and a plurality of rolling bodies. The cylindrical portion has a cylinder portion, a projection projecting inward in the radial direction in one axial end portion of the cylinder portion and having a step surface, and an oil supply passage. At least a part of a radial inside opening of the oil supply passage opens to a portion of the cylinder portion positioned further on the other side in the axial direction than the step surface. The oil supply passage has an oil-passage hole penetrating the cylinder portion and an oil-passage groove continuous with the oil-passage hole and recessed from the step surface.

Abstract: A lubrication device for a helicopter including: an oil sump in which oil for lubrication is retained; a lubrication pump configured to suck the oil from the oil sump to discharge the oil; and a lubrication passage extending from the lubrication pump to a first lubrication target. The lubrication passage includes: a first supply port that supplies the oil to the first lubrication target; an oil reservoir provided upstream of the first supply port; and an opening provided upstream of the oil reservoir and above the oil reservoir. The first supply port is formed right above the first lubrication target.

Abstract: An internal-pressure rise prevention structure of a speed reducer according to the invention includes a speed reduction mechanism that decelerates rotation of an input part and transmits the decelerated rotation to an output part, and a container having a communication hole formed in a wall surface that defines an internal space for accommodating the speed reduction mechanism and lubricant. The communication hole is situated vertically above the level of the lubricant.

Abstract: A Lubrication system for an engine component of a gas turbine engine, such as a planetary gearbox. The system comprises a main lubrication system comprising a main tank configured to supply lubricant to the engine component, and a main reservoir configured to collect lubricant scavenged from the engine component after lubrication; and an auxiliary lubrication system comprising an auxiliary reservoir configured to collect lubricant scavenged from the engine component after lubrication and to supply scavenged lubricant to the engine component. Main reservoir comprises an interior and the auxiliary reservoir is located within the interior of the main reservoir. The auxiliary reservoir comprises an upper portion, a lower portion and a lubricant pickup region, the upper portion comprising an opening arranged to permit lubricant to overflow into the main reservoir, and the lower portion of the auxiliary reservoir being shaped to cause lubricant to drain towards the lubricant pickup region.

Abstract: A lubricant supported electric motor includes a stator presenting an stator raceway, and a rotor movable relative to the stator and presenting a rotor raceway disposed in spaced relationship with the stator raceway to define a gap therebetween. A lubricant is disposed in the gap for supporting the rotor relative to the stator. The stator defines at least one hydrostatic support chamber disposed in radially recessed relationship relative to the stator raceway and in fluid communication with the gap. The stator also defines a passageway disposed in fluid communication with the at least one hydrostatic support chamber for providing lubricant to the at least one hydrostatic support chamber and the gap. A flow restriction mechanism is disposed in fluid communication with the passageway for controlling and balancing a supply and pressure of the lubricant in the hydrostatic support chamber.

Abstract: An oil distribution device for a rotating planet carrier of a step-down gear of a turbomachine is configured to be fixedly joined to a tubular member for supporting a bearing of the planet carrier, said oil distribution device having an oil inlet and a row of oil outlets at the external periphery thereof, said oil distribution device having at least two internal cavities which are connected in series by at least one calibrated port, one of these cavities, referred to as the receiving cavity, being connected to said oil inlet, and internal calibrated channels for conveying oil which extend substantially radially from said cavities as far as ports of the periphery of the device in order to form said oil outlets.

Abstract: A gearbox for a gas turbine engine with a rotatably mounted structural component that is formed with an at least approximately rotationally symmetrical duct into which, starting from its radially inner area, oil from an oil supply which is fixedly attached at the housing can be introduced. Starting from the oil supply, an introduction direction of the oil into the duct encloses an angle of 90° or an angle of between 60° and 90° with the axial extension direction of the duct. Additionally, in the circumferential direction of the duct, the introduction direction of the oil encloses an angle with the radial extension direction that is larger than or equal to 0° and smaller than 90°.

Abstract: There is provided a gear device including a motor having a motor shaft, a gear mechanism, a coupling that couples the motor shaft and an input shaft of the gear mechanism with each other, a first space accommodating the gear mechanism and holding a lubricant, a communication passage allowing the first space and a second space for accommodating the coupling to communicate with each other, and a blocking member disposed between the gear mechanism and the communication passage.

Abstract: A transmission (G) for a motor vehicle includes a pump (P), an oil sump (S), a hydraulic control unit (HCU), a gear set (RS) for providing different transmission ratios between an input shaft (GW1) and an output shaft (GW2) of the transmission (G), and a cavity (HY) arranged on an input side, in which a torque converter (TC) and/or an electric machine (EM) are accommodated. The cavity (HY) is connected to the oil sump (S) via a gap (C) configured for a passive return of oil out of the cavity (HY) into the oil sump (S). In order to reduce the gap (C), a separating element (T) is configured for making it difficult for oil to flow out of the oil sump (S) to the cavity (HY). A drive train comprising such a transmission (G) is also provided.

Abstract: A gear assembly of an aircraft including an engine is generally provided. The gear assembly includes a first gear meshed with a second gear to define a gear mesh, and a walled lubricant tank defining a lubricant reservoir and a reservoir inlet opening. The reservoir inlet opening is defined adjacent to an out-of-mesh side of the gear mesh. At least a portion of lubricant from the gear mesh enters the lubricant reservoir through the reservoir inlet opening.

Abstract: A lubricating device of a power transmitting system including a power transmitting mechanism. The lubricating device includes: an oil reservoir; an oil pump; an oil catcher provided to receive a portion of the oil delivered from the oil pump; and an oil piping assembly through which the oil delivered from the oil pump flows to be delivered to each of the at least one lubricated portion. The oil piping assembly has a first oil delivery nozzle from which the oil is delivered to each lubricated portion, and a second oil delivery nozzle from which the portion of the oil delivered from the oil pump flows into the oil catcher. The second oil delivery nozzle has a length larger than that of the first oil delivery nozzle.

Abstract: A planet pin includes a center axis and an outer contour that runs at a distance r(x) from the center axis. The distance r(x) is dependent on an axial position x in at least one longitudinal portion. For at least one axial position interval [x1, x2], the distance r(x), for all x?[x1, x2], of the outer contour from the center axis is r(x)=l(x)+g(x)+o(x), where l(x) is a linear function, g is constantly zero or convex on the interval [x1, x2], and o(x0)=0 applies for at least one x0?]x1, x2[. The function o is concave on the interval [x1, x0], convex on the interval [x0, x2], and decreasing in x0.

Abstract: A vehicle drive unit assembly having a ring gear with a plurality of ring gear teeth extending from an outer surface thereof. At least a portion of a lubricant collector having a body portion with a first side, a second side, a first end portion, a second end portion and an intermediate portion is disposed proximate to and directly adjacent at least a portion of the ring gear. The lubricant collector has one or more first receiving portions and/or one or more second receiving portions defining a collector reservoir therein. The one or more first receiving portions and/or one or more second receiving portions of the collector reservoir receive an amount of lubricating fluid that is expelled or thrown from the ring gear.

Abstract: Lead screw nuts having a body having a threaded opening having a thread region formed from a plurality of different materials having different properties, e.g., a thread region formed from a first material, such as a relatively low friction material, and a second material, such as a relatively high strength material (having thread portions formed from the first material and thread portions formed from the second material).

Abstract: An oil supply structure which supplies lubricating oil to a portion to be lubricated in a casing, the oil supply structure comprises an opening portion provided on a wall portion of the casing which corresponds to a shaft end portion of a rotary shaft supported by a bearing in the casing, and an oil passage configured to provide communication from the opening portion to at least the bearing.

Abstract: A vehicle axle assembly includes an axle housing and a carrier assembly. The carrier assembly includes a carrier housing and a differential assembly that includes a ring gear arranged in meshing engagement with a pinion gear. The gears are urged away from one another by separation forces during torque transfer. The carrier housing includes a curved wall circumscribed by a mounting flange as well as a plurality of integrally formed and parallel spaced apart gussets interconnecting the curved wall and the mounting flange. The gussets extend in a direction parallel to the gear separation forces to resist bending of the carrier housing. Other features increasing the structural rigidity of the one-piece carrier housing are discussed.

Abstract: A lubrication mechanism for a vehicle drive-force transmitting apparatus including; first and second gears meshing with each other in a meshing region; and a casing storing therein the first and second gears. The lubrication mechanism includes a gutter that extends from an inner wall surface such that oil is received in the gutter and is then dropped from an end of the gutter. The gutter includes a flow-direction changing rib with which the received oil is to be collided whereby a flow direction of the received oil is changed to a direction toward the end of the gutter. The end of the gutter is located on upper side of the meshing region, between first and second vertical planes containing respective first and second axes about which the first and second gears to be rotated, and is located between opposite ends of the meshing region.

Abstract: A planetary gear train for an aircraft engine, has a sun gear rotatable about a rotation axis, planet gears meshed with the sun gear and circumferentially distributed about the rotation axis, and a ring gear meshed with the planet gears, a planet carrier having first and second disk members axially offset from one another relative to the rotation axis, the planet carrier having planet bearings secured to the first and second disk members and extending axially therebetween, the planet gears rotatably supported by the planet bearings, the planet carrier having connecting members secured to both of the first and second disk members, the connecting members located circumferentially between the planet bearings, a lubrication network extending within the planet carrier and in fluid flow communication with the planet bearing and extending within the connecting members, the connecting members defining outlets of the lubrication network, the outlets oriented toward the sun gear.

Abstract: A gas turbine engine comprises a fan drive turbine, a fan rotor, and a gear reduction driven by the fan drive turbine to, in turn, drive the gear architecture. A main oil supply system supplies oil to components within the gear reduction, and an auxiliary oil supply system. The auxiliary oil system operates to ensure that the gear reduction will be adequately supplied with lubricant for at least 30 seconds at power should the main oil supply system fail.