Abstract:
.A composite gear part (4) for a gear arrangement is disclosed. The composite gear part (4) comprises a shaft part (3) adapted to be rotationally mounted in a gear arrangement, an inner part (5) made from a first material, and an outer part (6) made from a second material, said outer part (6) being fixed circumferentially to the inner part (5), and said outer part (6) having a plurality of gear teeth formed therein. The outer part (6) must be made from a material which is sufficiently durable and hard to fulfil requirements to gear teeth. The material may be a surface hardened high-alloyed steel or a high-alloyed cast iron. The material of the inner part (5) need not fulfil such requirements and may, e.g., be cast iron. Accordingly, the required amount of the more expensive and possibly scarce material is reduced. The inner part (5) is formed integrally with the shaft part (3). Thereby it is not necessary to provide an accurate fit between the inner part (5) and the shaft part (3), and the manufacturing process is made easier and more cost effective. Less material is required in order to obtain sufficient stiffness of the inner part (5)/shaft part (3). The composite gear part (4) is suitable for use in a gear arrangement of a wind turbine.
Abstract:
A method for making a differential housing (20) having a ring gear (30) integrally formed therein includes the steps of providing a differenntial housing having an annular rim integrally preformed therein; supporting the differential housing between upper and lower halves of a rotatable holding tool such that the annular rim extends radially outwardly from the holding tool for movement therewith; providing a thickening tool having a tool surface engagable with the annular rim during rotation of the holding tool to form a thickened lip; and providing a gear forming tool engagable with the thickened lip during rotation of the holding tool, whereby a plurality of teeth are formed along the lip to form the ring gear.
Abstract:
The invention relates to a method for the production of a shaft-hub connection. A toothed or splined shaft with external teeth, is engaged in an internal spline of a hub with some play and with teeth in recesses and the external teeth of the shaft are pressed into the internal toothing of the hub. According to the invention, in order to permit a simple, reproducible production of a shaft-hub connection, which optimally fulfils the demands of dynamic loadings, the shaft, when in the sliding position thereof, is plastically deformed, extending radially outwards from a cavity (10) in the shaft (4) and is pressed on the hub (5) to give a lash-free connection between the recesses (8) of the external teeth (2) on the shaft and the internal teeth (6) on the hub (5) which engage therewith, such that the hub is elastically deformed and a pressfit is established between shaft and hub.
Abstract:
A method and apparatus for pressing a gear (30) or the like onto a shaft (45). A pressing actuator (130) has a fixed portion (131) and a movable actuator rod (145) for engaging a face (31) of the gear. The actuator rod moves through and is concentric with the pressing sleeve (100). An actuator rod adapter (155) and a shaft adapter (185) attach the shaft to the actuator rod. When the actuator rod is retracted within the actuator body, the shaft is pulled through a shaft bore in the gear by the actuator rod, the actuator rod adpater and the shaft adapter while the gear is held stationary with respect to the actuator fixed portion by the pressing sleeve, thus pressing the gear onto the shaft.
Abstract:
The present invention relates to a roller reducer comprising a transmission gear having an externally threaded shaft having at least one left-handed thread portion, at least one right-handed thread portion, and at least one shaft flange ring, and a plurality of rollers, each roller having a plurality of thread portions, comprising at least one left-handed thread portion and at least one right-handed thread portion, each thread portion arranged to engage with the respective thread portions of the shaft, and at least one roller flange ring arranged adjacent to the roller thread portions to rotationally slide against the corresponding at least one flange ring of the shaft. Diameters of the flange rings of the rollers and the flange rings of the shaft are each equal to the respective effective thread diameters of the engaged thread portions of the rollers and the shaft, respectively. Advantageously, the inventive roller gear eliminates, at least in part, bending of the rollers and the threaded shaft, lessens slip while increasing efficiency of the reducer.
Abstract:
An axle assembly with an axle housing with a pair of bearing journals, a differential assembly disposed between the bearing journals, a pair of differential bearings and a pair of hollow adjusters that can be threaded into the bearing journals to preload the differential bearings and control gear lash between a pinion and a ring gear. Retaining members can be non-rotatably engage to the hollow adjusters and can be press-fit into counterbores in the outboard sides of the bearing journals. The axle housing can include an unitarily formed differential housing with a body and an axle tube structure, and a first axle tube that can be discretely formed and coupled to the body.
Abstract:
A planetary gear set (1) includes a sun gear (30); pinions (20) that are positioned around the sun gear (30) and that mesh with the sun gear (30); and a ring gear (40) that is positioned on the outer side of the pinions (20) and that meshes with the pinions (20). Each pinion (20) has a plurality of teeth (291) on the outer surface thereof. Each tooth (291) has a first tooth surface and a second tooth surface on opposite sides of the tooth (291), which can contact tooth surfaces of the sun gear (30) and the ring gear (40). The deviation of the first tooth surface from the corresponding reference surface differs from the deviation of the second tooth surface from the corresponding reference surface.
Abstract:
A method for fabricating an input pinion for an automotive differential that includes: providing a shaft; forging a pinion with a plurality of teeth such that each tooth is formed to at least a near-net size, forming a hole in the pinion, pressing an end of the shaft into the hole in the pinion, and securing the shaft to the pinion.
Abstract:
A gas turbine engine has a fan and a turbine section including a turbine rotor to drive the fan through a gear reduction module. An input shaft downstream of the turbine rotor includes a flexible mount driving the gear reduction. The input shaft is mounted within a bearing module. The gear reduction module has static structure mounted to an engine housing through a flexible mount. Oil is supplied into the gear reduction. An oil tube supplies oil from the gear reduction to the bearing module, and is received within openings in the static structure, and a housing for the bearing module. The oil tube extends through an assembly guide having a guide opening spaced away from an outer periphery of the oil tube. The guide opening is intermediate the openings. A method is also disclosed.