Abstract: A power skiving method wherein three-dimensional cutter rotations relative to gear workpiece tooth flank surfaces are carried out so as to reposition the cutter relative to a gear workpiece so as to achieve a decrease and/or an increase in the pressure angle of the tooth flank surfaces. The method can be applied independently to left and right flank surfaces of a tooth slot or the rotations may be superimposed on one another to realize pressure angle corrections on both tooth flanks of a tooth slot.

Abstract: A transmission having a housing (18), at least a first input (20) rotatable about a first input axis (IA1), and at least a first output (26) rotatable about a first output axis (OA1). The transmission further includes a first outer side gear (14) connected to and drivable by the first input, a first planet gear set comprising a first inner planet gear (11) and a first outer planet gear (15) with the inner and outer planet gears being rigidly connected to, and in axial alignment with, one another. The first planet gear set is rotatable (22, 24) via the first outer side gear and is also rotatable (23) about the first output axis. The transmission further includes a second outer side gear (16) in mesh with the first outer planet gear, and a second inner side gear (12) connected to the first output and being rotatable about the first output axis via the first inner planet gear.

Abstract: A method of producing a tooth flank surface on gear teeth by controlled removal of stock material from a work gear with a tool with the work gear and the tool being movable with respect to one another along and/or about a plurality of axes. The tool and work gear are engaged with one another and then moved relative to one another in a generating motion along and/or about the plurality of axes. Stock material is removed from the work gear to produce the tooth surface on the work gear. The generating motion along and/or about the plurality of axes comprises motion along and/or about at least one of the axes with the motion being defined by a function having a first level component and a second level component. The first level component defining a maximum flank form deviation amplitude for each tooth of the work gear, and the second level component defining a modification of the tooth surface of each tooth of the work gear.

Abstract: Pericyclic transmission having at least one input shaft (58) rotatable about an axis of rotation and at least one inclined bearing seat (55, 56) secured to the input shaft with the inclined bearing seat being oriented at an inclination angle with respect to the axis of rotation of the input shaft. An input gear (52, 54) is attached to each inclined bearing seat with the input gear being oriented at the inclination angle and having an axis of rotation inclined to the axis of rotation of the input shaft by the inclination angle whereby upon rotation of the input shaft, the input gear performs at least a nutating motion. The transmission also includes an intermediate gear (51, 53) in mesh with the input gear with the intermediate gear having an axis of rotation coincident with the axis of rotation of the input shaft. The intermediate gear communicates with a transmission output.

Abstract: A method of applying a contrast agent, such as a luminescent contrast agent (e.g. fluorescent, phosphorescent) to the tooth flank surfaces (3, 4) of a gearset (1, 2) wherein the luminescent contrast agent is mixed with transmission oil and is preferably invisible to the human eye. While the members of the gearset roll together, the contrast agent-oil mixture (6) is first introduced into the mesh of the rolling gears. While the mixture is squeezed through the tooth contact, most of the oil is removed in the area of tooth contact. A camera (15), including, as necessary, a filter for certain light wave frequencies, obtains an image which shows the areas with and without luminescent contrast agent. The area (10) where the luminescent contrast agent has been partially or completely removed represents the zone of the tooth contact.

Abstract: A self-locking screw wherein the self-locking function is maintained during many cutter head building and truing cycles. The inventive screw includes a self-locking feature having high elasticity and high self-locking torque. The screw includes a slot filled with an elastic compliant material.

Abstract: A transmission having a housing (18), at least a first input (20) rotatable about a first input axis (IA1), and at least a first output (26) rotatable about a first output axis (OA1). The transmission further includes a first outer side gear (14) connected to and drivable by the first input, a first planet gear set comprising a first inner planet gear (11) and a first outer planet gear (15) with the inner and outer planet gears being rigidly connected to, and in axial alignment with, one another. The first planet gear set is rotatable (22, 24) via the first outer side gear and is also rotatable (23) about the first output axis. The transmission further includes a second outer side gear (16) in mesh with the first outer planet gear, and a second inner side gear (12) connected to the first output and being rotatable about the first output axis via the first inner planet gear.

Abstract: A method for producing honing tools (24) that are conjugate to the bevel pinions and ring gears (26) they are intended to hone and which can be produced (e.g. cut) on a standard bevel gear free form machine. The method is described by two transformation steps with the basis of the transformations being the theoretical generating gear. The invention relates also to a toothed bevel honing tool produced by such a method and a method of honing bevel gears when provided with such a tool produced by such a method.

Abstract: Pericyclic transmission having at least one input shaft (58) rotatable about an axis of rotation and at least one inclined bearing seat (55, 56) secured to the input shaft with the inclined bearing seat being oriented at an inclination angle with respect to the axis of rotation of the input shaft. An input gear (52, 54) is attached to each inclined bearing seat with the input gear being oriented at the inclination angle and having an axis of rotation inclined to the axis of rotation of the input shaft by the inclination angle whereby upon rotation of the input shaft, the input gear performs at least a nutating motion. The transmission also includes an intermediate gear (51, 53) in mesh with the input gear with the intermediate gear having an axis of rotation coincident with the axis of rotation of the input shaft. The intermediate gear communicates with a transmission output.

Abstract: A method of machining a tooth flank of a gear with a gear machining tool. The method comprises rotating the tool and bringing the tool and the tooth flank into contact. Relative movements are provided between the tool and the gear to traverse the tool across the tooth flank along a path whereby the path produces a tooth flank geometry of a form which, when brought into mesh with a mating tooth flank under no load or light load to form a tooth pair, provides a motion graph curve comprising a sinusoidal portion (62, 89, 91, 90, 63) and a parabolic portion (92).

Abstract: A powertrain of a vehicle comprising an electric motor (16) having a drive shaft (11) wherein the drive shaft is oriented preferably perpendicular to the common axis (Aw) of the wheels (18) which the powertrain is intended to drive (i.e. rotate). The drive shaft of the electric motor is mechanically connected to the axles (20, 22) of the wheels, which are aligned with the common axis, via a transmission (10) having at least one pair of mating gears (12, 14), preferably with one of the pair of mating gears being an offset pinion (14), and with the reduction ratio of the transmission being in the range of about 6 to about 15 with the pinion having 2 to 6 teeth.

Abstract: A power skiving method wherein three-dimensional cutter rotations relative to gear workpiece tooth flank surfaces are carried out so as to reposition the cutter relative to a gear workpiece so as to achieve a decrease and/or an increase in the pressure angle of the tooth flank surfaces. The method can be applied independently to left and right flank surfaces of a tooth slot or the rotations may be superimposed on one another to realize pressure angle corrections on both tooth flanks of a tooth slot.

Abstract: A method directed to gear cutting tools and gear cutter job consolidation resulting in a single cutter capable of cutting a plurality of different members of a part family. The method comprises a multi-step approach comprising a first step of defining a temporary master. A second step creates a virtual master which is especially well-suited for accommodating the requirements of the jobs in the consolidation variety. A third step determines cutting depths and optimized machine settings for all consolidation jobs using the virtual master.

Abstract: A cutter head (30) having stick blades (82) with a circular (62) or partially circular (72, 92, 102, 112, 122) cross-section wherein the circular part of the cross-section is dominating. The cutter head preferably includes cutter head slots (31) having a five-sided cross-section which will provide a defined positive seating between a clamp block (34) and the surfaces of the slots (35, 36). The stick blades cross-section preferably includes at least one flat section (77, 81, 98, 108, 109 118, 119, 128).

Abstract: A method wherein a cutting or grinding chamfering tool (25) is guided along the face width of a gear (12, 23, 52) through one tooth slot (8) (e.g. from heel to toe) while it contacts the topland corners (10, 1 1) of the respective concave and convex tooth flanks of adjacent teeth (2, 4). The tool moves to an index position, the gear is indexed to the next tooth slot position and the tool moves through the tooth slot (e.g. from the toe to the heel). The cycle is repeated until all topland corners are chamfered.

Abstract: A gear cutting tool wherein each cutting blade group includes two differently positioned but identical cutting blades (41, 40) such as an one outside and one inside blade. The inventive blade arrangement only requires a single type of blade (30) in order to simultaneously cut the convex and the concave tooth flanks of a gear as well as the root fillet and root bottom portions of tooth slots. The cutter system allows radial adjustment of the outside cutting blade and the inside cutting blade independently of one another. Additionally, inside and outside cutting blades may be exchanged with one another.

Abstract: A self-locking screw wherein the self-locking function is maintained during many cutter head building and truing cycles. The inventive screw includes a self-locking feature having high elasticity and high self-locking torque. The screw includes a slot filled with an elastic compliant material.

Abstract: Cutting blade pressure angle changes or corrections in power skiving cutters (20) can be realized without the need tor a tool geometry change. An axial shift (26) of the blade reference point (24) will shift the existing involute on the blade profiles (22, 23) into a different radial location. An accompanying shift (AR) of the reference involute profile (30) by approximately the same amount and in the same direction will re-establish the relationship between work gear and cutter. The resulting work gear geometry has the same radial location of the slots, with the same slot width and the same tooth thickness but with a changed pressure angle.

Abstract: A method of grinding 3-face ground cutting blades for producing gears by a face hobbing cutting process wherein the correct initial blade spacing angle ? is achieved while providing the desired values for the effective cutting edge hook angle and the effective side rake angle as well as providing a complete cutting blade front face clean-up.

Abstract: A process for improving the excitation behavior of a ground bevel gear set by altering the surface structure of a gear set member from tooth slot to tooth slot (Teeth 1-3). The method comprises shifting the roll-positions in a way that not every facet or flat (F) is positioned the same way on each flank (2) and/or changing the distances of the roll angle along a tooth slot (delta RPj) whereby flats are spaced unequally (i.e. varying widths) along the tooth. One or more additional processes for altering the surface structure may be included.