Abstract: A method of servicing a gas turbine engine, the method including preparing the gas turbine engine for service; installing a shaft protection cover to an aft end of a fan shaft of the gas turbine engine; installing an oil collector drum at least partially around a gearbox of the gas turbine engine; and removing at least a portion of the gearbox from the gas turbine engine.

Abstract: A solid dose for insertion into the skin of a patient wherein the solid dose has a hollow core. There is also provided a solid dose carrier, a device, a method of manufacturing the solid dose and a method of delivering a solid dose transdermally to a human or animal.

Abstract: A straight bevel gear having a gear body that includes a first set of gear teeth and at least one web. The set of gear teeth may have a spherical involute configuration. The web may extend between adjacent members of the set of gear teeth such that the web may be completely and continuously curved in multiple directions.

Abstract: The problem of the present invention involves providing a gear that has high tooth-root bending strength and for which there is no chipping of the tips of the teeth. Accordingly, the surface of the gear is carburized and the gear is strengthened by imparting residual stress, with the residual stress in the region with a surface depth of 5 ?m to 20 ?m being ?1000 MPa or less, and the residual stress in the region with a surface depth of 50 ?m to 150 ?m being ?1000 MPa or greater.

Abstract: A wave generator (5) for a flat-type strain wave gearing (1) has a first elliptical outer circumferential surface (6S) of a first wave generator portion (5S) defined by a first elliptical curve (C1), and a second elliptical outer circumferential surface (6D) of a second wave generator section (5D) defined by a second elliptical curve (C2). Compared to using a wave generator for which the contour is defined by a single elliptical curve, differences between the ball load distribution of the first wave generator portion (5S) and the ball load distribution of the second wave generator portion (5D) can be suppressed, both ball load distributions can be equalized, and the equivalent ball load can be reduced; therefore, an increase in the lifespan of the wave generator bearing can be achieved.

Abstract: Embodiments include a modular flex plate assembly with a plurality of modular segments connectable with at least another modular segment by joining a first end of one modular segment to a second end of another modular segment to form a ring gear. The ring gear can be mounted to a substrate and mounted or fastened to a component of an engine or a transmission system. A plurality of securing devices can cooperatively engage the ring gear to a substrate, such that the gear teeth of the ring gear align with the perimeter edge of the substrate.

Abstract: A process and an apparatus for generating control data, wherein a first tooth flank geometry is determined which corresponds to a geometry of a first tooth flank of the herringbone gearing, a second tooth flank geometry is determined which corresponds to a geometry of a second tooth flank of the herringbone gearing, a transition section geometry is determined which corresponds to a geometry of a transition section between the first tooth flank and the second tooth flank, an overall tooth flank geometry is determined which comprises the first tooth flank geometry, the transition section geometry and the second tooth flank geometry, and the control data is generated based on the overall tooth flank geometry and machining paths are indicated, each extending transversely to the profile direction of the tooth flanks and along the first tooth flank geometry, the transition section geometry and the second tooth flank geometry.

Abstract: A composite gear part for a gear arrangement includes a shaft part adapted to be rotationally mounted in the gear arrangement, an inner part made from a first material, and an outer part made from a second material. The outer part is fixed circumferentially to the inner part, and the outer part has a plurality of gear teeth formed therein. The outer part must be made from a material which is sufficiently durable and hard to fulfill requirements for gear teeth, but the material of the inner part need not fulfill such requirements. The inner part includes recesses or apertures arranged so that the inner part supports the outer part in an asymmetric manner.

Abstract: The problem of the present invention involves providing a gear that has high tooth-root bending strength and for which there is no chipping of the tips of the teeth. Accordingly, the surface of the gear is carburized and the gear is strengthened by imparting residual stress, with the residual stress in the region with a surface depth of 5 ?m to 20 ?m being ?1000 MPa or less, and the residual stress in the region with a surface depth of 50 ?m to 150 ?m being 1000 MPa or greater.

Abstract: Systems and methods in accordance with embodiments of the invention implement bulk metallic glass-based macroscale gears. In one embodiment, a method of fabricating a bulk metallic glass-based macroscale gear, where at least either the thickness of the gear is greater than 3 mm or the diameter of the gear is greater than 9 mm, includes: obtaining design parameters of the gear to be formed; selecting a bulk metallic glass from which the gear will be formed based on the obtained design parameters, where the selected bulk metallic glass is characterized by a resistance to standard modes of wear and a resistance to brittle fracture such that a gear can be formed from the selected bulk metallic glass that accords with the obtained design parameters; and fabricating the gear from the selected bulk metallic glass that accords with the obtained design parameters.

Abstract: A novel method of manufacturing a toothed disc is taught wherein the teeth can be cold formed to a relatively high set of tolerances in a relatively time-efficient manner. A cold-formed disc blank with an annular thickened ring about its periphery is forced through a set of tooth forming rollers which engage the annular thickened ring. As the blank is forced through the set of rollers, the rollers cold forming tooth structures in the annular ring. In some circumstances, the tooth structure can be a final desired tooth profile and in other circumstances, the disc blank may be forced through two or more different sets of tooth forming rollers, each set of tooth forming rollers contributing to the forming of the final, desired tooth profile.

Abstract: A form rolling method for an involute gear, which includes a work piece including a cylindrical outer peripheral surface having a predetermined radius, and a round die with an involute tooth profile including an addendum pitch corresponding to a pitch defined by dividing a length of an outer circumference of the work piece by number of teeth of the involute gear. The round die is pressed to the work piece while rotating when form rolling the involuete gear.

Abstract: An annular caulking-fastened component to be fastened to a counterpart component by caulking includes a notch formed in an inner peripheral edge portion at one end side in a center axis direction, the notch being to be fixed to the counterpart component by caulking; and at least one of an inner-peripheral stepped portion formed between an inner peripheral surface and the inner peripheral edge portion and outward from the inner peripheral surface in a radial direction and an end-face stepped portion formed between an end face at one end side in the center axis direction and the inner peripheral edge portion and from the end face toward the other end side in the center axis direction.

Abstract: A sprocket assembly may include a hub and a plurality of circumferentially spaced projections extending radially outward from the hub. The sprocket assembly may also include a plurality of teeth, each tooth being carried by one of the projections and having a recess that receives said projection therein. The projections and the recess in the teeth may have complimentary geometry to provide a close fit.

Abstract: A degree of freedom of a hypoid gear is improved. An instantaneous axis in a relative rotation of a gear axis and a pinion axis, a line of centers, an intersection between the instantaneous axis and the line of centers, and an inclination angle of the instantaneous axis with respect to the rotation axis of the gear are calculated based on a shaft angle, an offset, and a gear ratio of a hypoid gear. Based on these variables, base coordinate systems are determined, and the specifications are calculated using these coordinate systems. For the spiral angles, pitch cone angles, and reference circle radii of the gear and pinion, one of the values for the gear and the pinion is set and a design reference point is calculated. Based on the design reference point and a contact normal of the gear, specifications are calculated. The pitch cone angle of the gear or the pinion can be freely selected.

Abstract: A manufacturing method for a toothed part including a bottom surface portion and a side wall portion provided to extend upright from an outer peripheral end portion of the bottom surface portion, the side wall portion being formed with teeth. The manufacturing method includes a half drawing process of performing draw shaping on a material having a disk shape to form the bottom surface portion and the side wall portion, an inside diameter of which becomes larger in a direction away from the bottom surface portion; and a tooth shaping process of forming the teeth in the side wall portion.

Abstract: A turbine engine includes a fan section including a plurality of fan blades, a turbine section, and an epicyclic gear train coupled between the turbine section and the fan section for providing a speed reduction between turbine section and the fan section. The epicyclic gear train includes a plurality of intermediate gears. A carrier supports the plurality of intermediate gears. A sun gear meshes with the plurality of intermediate gears and a ring gear surrounding and meshing with the plurality of intermediate gears. The ring gear includes first and second portions that each have an inner periphery with teeth. The first and second portions of the ring gear have an outer circumferential surface opposite the teeth that provides a first thickness, a second thickness greater than the first thickness and axially inward from the first thickness, and a flange extending radially away from the axis. An epicyclic gear train for a turbine engine and method of designing an epicyclic gear train are also disclosed.

Abstract: The invention relates to a method and a device for influencing the cut and functional face, especially the reduction, during fine blanking of a finished part, for example, a gear, cut out of a metal strip, wherein the metal strip is clamped during closure between an upper part at least comprising a cutting punch and guide plate for the cutting punch and a lower part at least comprising a die plate and ejector and in a first working stage a blank with reduction is cut out of the metal strip. The invention has the task of providing a method and a device for purposefully influencing the cut and functional face, especially the reduction, during the production of finished parts, like gears, making it possible to purposefully influence or totally eliminate the edge reduction, while simultaneously maintaining the functional surfaces and saving material.

Abstract: Three methods of fabricating an intermediate, center or combination gear for a stacked planetary gear assembly are presented. A first method comprehends forming male splines on the outer surface of the inner (ring) gear and female splines on the inner surface of the outer (sun) gear. The gears are then heat treated and assembled. A second method comprehends broaching internal splines in the outer (sun) gear as well as end milling, broaching or polygon turning face splines on one end of the outer gear and an opposing, adjacent end of the inner (ring) gear. A third method includes fabricating and heat treating the inner and outer gears. A small area of the hardened case is then removed by, for example, machining. The gears are mated, heated rapidly by a pulse of electric current and upset in the heated region.

Abstract: Systems and methods in accordance with embodiments of the invention implement copper-based materials in applications where resistance to wear is desired. In one embodiment, a wear-resistant gear includes a gear defined by a rotatable body having teeth disposed on an outer surface of the rotatable body, where the gear body is formed at least in part from a material including copper and X, where X is one of zirconium, titanium, hafnium, rutherfordium, and mixtures thereof and where the atomic ratio of copper to X is approximately between 2:3 and 3:2.

Abstract: An electric motor includes one or more separate coil sets arranged to produce a magnetic field of the motor. The electric motor also includes a plurality of control devices coupled to respective sub-sets of coils for current control. A similar arrangement is proposed for a generator. A coil mounting system for an electric motor or generator includes one or more coil teeth for windably receiving a coil for the motor and a back portion for attachably receiving a plurality of the coil teeth. A traction control system and method for a vehicle having a plurality of wheels independently powered by a respective motor. A suspension control system and method for a vehicle having a plurality of wheels, each wheel being mounted on a suspension arm of the vehicle and being independently powered by a respective motor.

Abstract: A sprocket assembly is provided. The assembly includes a sprocket frame having a central body and a first ledge portion body. The first ledge portion has a first aperture extending therethrough. The assembly further includes a first removable tooth having a first tip portion, first and second landing portions, and a first extension portion. The first tip portion has first and second sides and first and second ends. The first extension portion extends from the second end and has an aperture extending therethrough. The assembly further includes a first bolt extending through the first aperture in the first ledge portion and the aperture in the first extension portion to removably couple the first extension portion to the first ledge portion.

Abstract: An angle sensor for determining a rotation angle of a rotatable body, such as a steering column in a motor vehicle, includes a gear wheel. The orientation of a magnetic field generated by the gearwheel is configured to be detected by a magnetic field sensor. The gear wheel is comprised of a magnetisable material, such as hard ferrite, into which a magnetisation is introduced. The gear wheel is stronger in a central region than in an edge region in which the teeth are arranged. In order to weakly magnetise the edge region, which minimizes a negative influence of the teeth on the homogeneity of the generated magnetic field, the front face of the gear wheel is configured to be magnetized. The magnetisation process advantageously takes place at the same time as an injection moulding process to form the gearwheel. A method is implemented to produce the gear wheel.

Abstract: A yoke assembly adapted for use in a rack and pinion steering gear assembly for a vehicle comprises a yoke housing having a bore; a yoke bearing disposed in the bore; a yoke cover secured in the bore; a spring disposed in the bore between the yoke bearing and the yoke cover; and an automatic-adjusting mechanism secured in the yoke cover. The automatic-self adjusting mechanism includes a member which is configured to self adjust and move in a direction toward the yoke bearing so as to maintain the member in constant contact against the yoke bearing as associated components of the rack and pinion steering gear wear.

Abstract: A method of assembling a planetary gearset includes die-forming a plurality of circumferentially spaced apart teeth on a sun gear, a planet gear and a ring gear. Each tooth includes a pair of tooth flanks in a final net form for engagement with mating gear teeth. The sun gear teeth have a conical shape to allow a first die to linearly move relative to a second die after the gear teeth are die-formed. The planet gears are mounted on a carrier. The sun gear and the planet gear are oriented such that the conical shapes of the respective gear teeth taper in opposite directions from one another and the planet gear teeth meshingly engage with both the ring gear teeth and the sun gear teeth.

Abstract: A novel method of manufacturing a toothed disc is taught wherein the teeth can be cold formed to a relatively high set of tolerances in a relatively time-efficient manner. A cold-formed disc blank with an annular thickened ring about its periphery is forced through a set of tooth forming rollers which engage the annular thickened ring. As the blank is forced through the set of rollers, the rollers cold forming tooth structures in the annular ring. In some circumstances, the tooth structure can be a final desired tooth profile and in other circumstances, the disc blank may be forced through two or more different sets of tooth forming rollers, each set of tooth forming rollers contributing to the forming of the final, desired tooth profile.

Abstract: A method of producing a composite body, such as a gear wheel or torsional vibration damper, including a radially inner hub body provided with outer profiles, a surrounding outer body provided with inner profiles, and an intermediate layer of synthetic resin material which connects the outer profiles of the hub body with the inner profiles of the outer body; the hub body being with an inner contour adapted to mount the composite body on a shaft.

Abstract: This invention addresses the problem of providing a press-fit structure and a press-fit method capable of improving the durability of a gear which press-fits into a ring part. As such, the embodiment of this invention is that, while one end side in the central axis direction of the ring gear abuts against a protrusion formed protruding on the outer side of the radial direction of the ring part from the outer circumferential surface of the ring of the ring part, and wherein the press-fit structure press-fits the inner circumferential surface of the gear into the outer circumferential surface of the ring part, when the inner circumferential surface of the gear is press-fitted into the outer circumferential surface of the ring part, there is a tensile strength reduction mechanism reducing the tensile strength generated in the lower portion of the gear teeth in at least the position of the aforementioned end side of the gear.

Abstract: A method of forming a sprocket comprising forming a sprocket member having a tooth profile, forming grooves in the sprocket member base, installing a plurality of sprocket members in a mandrel thereby forming a build, applying an elastomer member between adjacent sprocket members, wrapping a tensile member about the sprocket members and elastomer members, curing the build, removing the build from the mandrel, and inverting the build and joining the build to a rigid core.

Abstract: In a flat wave gear device, there is determined a rack-approximated movement locus Lc1 of a flexible externally toothed gear with respect to an S-side rigid internally toothed gear accompanying rotation of a wave generator. ?OPT is a minimum value of the radius of curvature of the movement locus Lc1, and is determined from an evolute e of the movement locus Lc1. A convex arc having a radius ? (???OPT) is used in a main part of a tooth profile of the flexible externally toothed gear. A parallel curve c that is set apart from a movement locus Lc2 by the arc radius ? is used on a main part of a tooth profile to be generated on the S-side rigid internally toothed gear. The movement locus Lc2 accounts for the actual number of teeth, and is obtained from a center A of a convex arc of the flexible externally toothed gear being drawn with respect to the rigid internally toothed gear.

Abstract: A welded hollow gear ring (160, 260, 360, 460, 560) with an outer (140, 240, 340) and an inner (155, 255, 355) periphery, which exhibits a gear structure (131-138, 231-238, 331-338, 331?-338?) on at least one periphery, as well as exhibiting at least one welding joint (151, 251, 351, 451, 551) which has been formed by flash butt welding. The gear structure is formed by rolling, machining, or by a combination of machining and rolling. The gear structure can comprise cogs or helical gears.

Abstract: An accessory gearbox for a gas turbine engine has a main gearbox housing for receiving a plurality of gears to drive a plurality of accessories. An input shaft has a first bevel gear at an outer end, and extends inwardly to transmit rotation to the plurality of gears. A tower shaft has a second bevel gear engaging the first bevel gear to in turn drive the input shaft. A tower shaft houses is fixed to the main gearbox housing. A method of removing a tower shaft is also disclosed.

Abstract: A gear mechanism (22) of a wind power plant (10) that includes at least one planetary stage (24.1, 24.2) that has at least one planet gear carrier (41, 61) and a method for dismantling a multi-stage gear mechanism (22) of a wind power plant (10). The gear mechanism (22) is arranged in a nacelle (15) arranged on a tower (11) of a wind power plant (10). The gear mechanism (22) has at least one planetary stage (24.1, 24.2), and the at least one planetary stage (24.1, 24.2) has a planet gear carrier (41, 61) and several planet gears (45, 65) held in the planet gear carrier (41, 61) using planetary bolts (47, 67). The planet gears (45, 65) are in operative connection with a ring gear (49, 69) of the planetary stage (24.1, 24.2) surrounding the planet gears (45, 65).

Abstract: The invention relates to a toothing, in particular between a starting pinion (22) and a ring gear (25) of an internal combustion engine. The toothing is designed as straight or oblique toothing and comprises a number of individual teeth (202) that mesh with one another. The thicknesses of the individual teeth (212) are asymmetrical, in particular in reduced or widened form on one or both sides.

Abstract: A method of assembling a differential gear set includes installing a first bushing into a carrier, installing a second bushing into the carrier, and inserting a first planet gear into an interior portion of the carrier. The first planet gear includes a first planet gear shaft. A second planet gear including a second planet gear shaft is inserted into the interior portion of the carrier. The first and second planet gear shafts are installed into the first and second bushings. A third planet gear including a third planet gear shaft is inserted into the interior portion of the carrier and a fourth plant gear including a fourth planet gear shaft is inserted into the interior portion of the housing. The third and fourth planet gear shafts are passed into corresponding bushing receptors in the carrier. Third and fourth bushings are installed on the third and fourth planet gear shafts.

Abstract: A randomized chain sprocket has a set of four tooth gaps having three different tooth gap radial locations, two different link angles, and a chain with constant link pitch.

Abstract: A forged composite gear and a method of making a forged composite powder metal gear. The forged composite gear includes a plurality of teeth extending from a core, a first section having a first powder metal material, a second section having a second powder metal material and a variable boundary profile. The variable boundary profile is formed between the first section and the second section, whereby said variable boundary profile exhibits greater tooth wear resistance on the teeth and greater impact resistance in the core.

Abstract: An internal gear manufacturing method capable of manufacturing time reduction and easy core removal, and a metallic glass internal gear manufactured thereby. A carbon core formed into a shape of an external gear is arranged in a thin, long tubular mold of a length equal thereto with a space extending longitudinally therealong. A molten metal material is pressure-injected under a temperature higher than a melting point thereof into the space between the mold and the core. The molten metal material is resolidified by rapid cooling at or above a critical cooling rate thereof together with the mold and the core. After resolidification of the molten metal material, the core is removed by pulverization or dissolution. Along internal gear formed of the resolidified metal material is cut into a plurality of segments of a prescribed length.

Abstract: A pinion disassembly tool is configured to remove a yoke or a flange member and a pinion fastener from a splined pinion shaft in a pinion assembly. The tool includes a yoke holding plate with a central aperture sized to receive a socket wrench during removal of the pinion fastener. The yoke holding plate includes fastener apertures for connection to the yoke and at least one non-circular aperture for receiving a breaker bar during removal of the pinion fastener. The tool also includes a drive plate with a threaded aperture, the drive plate inserted through the central aperture of the yoke holding plate after removal of the pinion fastener. The tool also includes a drive bolt engaged with the threaded aperture and configured to force the drive plate and the yoke holding plate to pull the yoke from the splined pinion shaft as the drive bolt is rotated.

Abstract: A bidirectional gear set includes a male bidirectional gear component having an array of addendum teeth and a female bidirectional gear component having an array of dedendum sockets, wherein each dedendum socket has a full boundary edge around an open end thereof. One or both of the male and female gear components may have a circular cross sectional geometry, or one may have a non-circular cross sectional geometry. The non-circular cross sectional geometry may be a flat sheet or a sheet with surface contour. In an intermeshed state, neither the male nor the female component can ‘slide’ relative to the other regardless of whether the male and female components are arranged in a parallel or perpendicular orientation. A method of making a bidirectional gear set is disclosed.

Abstract: An object of the present invention is to provide a punching method using a punch, which makes it possible to effectively improve the durability of a tooth portion of the punch. In a punching method using a punch for forming a through-hole in a workpiece by punching the workpiece using a punch, at least a tooth portion of the punch is made substantially solid when the workpiece is punched by the punch, and the tooth portion is made substantially hollow, thereby a diameter of the tooth portion is reduced by a reaction force received from the workpiece, when the workpiece is separated from the punch after the punching of the workpiece.

Abstract: A gearbox housing to enclose a gearbox with a geartrain and a lubrication system includes a frame made of a first material to carry gearbox loads; and a shell made of a second material to connecting to the frame and to keep lubrication sealed within the lubrication system.

Abstract: Described herein is a planetary gear train, comprising: a sun gear that can turn about an axis and comprises a plurality of first teeth; a fixed crown wheel comprising a plurality of second teeth; and two planetary gears, each comprising a plurality of third teeth, the planetary gears each meshing with the crown wheel and the sun gear and able to turn about second axes, which are in turn able to turn about the first axis; at least two third teeth simultaneously mesh with second teeth and further two third teeth simultaneously mesh with first teeth; the third teeth comprise a first a second side, which have, respectively, a first and a second pressure angle different from one another; and the number of the third teeth is different from the absolute value of the semidifference between the number of the first teeth and of the second teeth.

Abstract: A randomized chain sprocket has a set of four tooth gaps having three different tooth gap radial locations, two different link angles, and a chain with constant link pitch.

Abstract: A differential gear casing of flower pot construction has an outer surface which is configured for receiving a crown wheel, whereby the crown wheel can be pressed onto the outer surface by different amounts for different applications. The outer surface is free from projections such that the crown wheel can be mounted on the outer surface from any axial direction. The outer surface defines a band on the differential gear casing and is parallel with a central axis of the differential gear casing. The crown wheel is secured to the differential gear casing using an axial weld line. In other embodiments, the crown wheel and/or a cover for the differential gear casing are secured in place using axial and/or radial weld lines.

Abstract: A method for producing an at least partially surface-densified metallic toothed element comprising a densified sintering material, in order to improve a strength profile, a preform of the toothed element being produced with a locally selective oversize relative to a final size of the toothed element and being rolled to the final size by means of at least one rolling die, the toothed element being densified in locally varied manner at least in the region of at least one flank and/or one root of a tooth of the toothed element to produce a densified outer layer.

Abstract: A shaft-gear connection comprises a shaft and a shrunk-on gear that has an axial first section, attached by a first shrink-fit bond, and an axial second section, attached by a second shrink-fit bond. The second shrink-fit bond is greater than the first shrink-fit bond so that a greater maximum torque to be transmitted from the gear to the shaft by the second shrink-fit bond than by the first shrink-fit bond. An axial intermediate section, attached by a third shrink-fit bond, is located between the axial first section and the axial second section. Both a surface pressure and a maximum torque that can be transmitted by the third shrink-fit bond are greater than the surface pressure and the maximum torque that can be transmitted by the first shrink-fit bond, but are less than the surface pressure and the maximum torque that can be transmitted by the second shrink-fit bond.

Abstract: A planet pin, a planetary gear system, and a method for balancing a load on a planetary gear system between respective planet gears. The planet pin includes a planet pin body having a flexure portion between a pair of ends. The flexure portion may be a planet pin body having grooves on opposing sides. The flexure portion may be a pair of pin bodies interference fit into annuluses of a centrally located barrel. The flexure portion may be a pair of pin arms extending from a centrally located ball joint.

Abstract: A method is disclosed. The method provides an assembly that contains a first drum-cylinder having an inner periphery surface and a drive gear assembly, wherein a portion of the drive gear assembly is in contact with the inner periphery surface, separates the drive gear assembly from the first drum-cylinder, inserts the portion of the drive gear assembly into a second drum-cylinder, and couples the drive gear assembly to the second drum-cylinder.

Abstract: Projections of a bevel gear or a vibrating body are formed by bending a metal-made plate member having a plurality of projections so as to direct them in the same direction and make their projecting direction include a component of out-of-plane direction and subsequently applying a load to the bent plate member to crush the projections so as to reduce the height thereof and increase the plate thickness.