A bevel gear set and a method of manufacturing the same are provided. The bevel gear set may include a first bevel gear and a second bevel gear. The first and second bevel gears may be spiral bevel gears or hypoid spiral bevel gears. The first and second bevel gears may each have a gear tooth surface having a plurality of teeth formed thereon, such that the teeth of the first bevel gear and the teeth of the second bevel gear are configured to engage in a meshing engagement. The teeth are machined onto the respective gear tooth surface via a face milling process. Each tooth includes a tooth top, a plurality of meshing surfaces, and at least one chamfer. The chamfer may be formed at an abutment edge disposed between the tooth top and a respective meshing surface via a brushing process directly following the machining of the teeth.

A gearwheel pairing for a helical gearing, comprising a helical gear with a first toothing segment, and a worm with a second toothing segment, wherein the first toothing segment and the second toothing segment can be brought into intermeshing and form an involute toothing when intermeshed, the materials of the first and the second toothing segments are chosen such that when intermeshed there results a plastic-metal material pairing, and the toothing segment made of plastic has a first normal tooth thickness and the toothing segment made of metal has a second normal tooth thickness, wherein the ratio of the first normal tooth thickness to the second normal tooth thickness is increased by 10 to 200% with respect to a reference profile.

An intersecting-axes gear type mechanism includes two gears configured to rotate in mesh with each other. Respective axes of rotation of the two gears being disposed in an intersecting-axes manner, and at least one of the gears has teeth each of which includes a tooth trace extending substantially in a radial direction and a radially inner end face. A chamfered portion is formed on a meeting portion where the radially inner end face and a tooth face of the each of the teeth meet, so as to extend over an overall length of the meeting portion. At least an entirety of an area where the chamfered portion and the radially inner end face meet and an entirety of an area where the chamfered portion and the tooth face meet are each composed of a curved surface in overall length.

A transmission or gearbox assembly with fail-safe means for providing redundancy where failure can lead to loss of torque transmission between component parts of the assembly, the assembly comprising a plurality of first components in torque transmitting engagement and at least one second component associated with at least one of the first components, the second component being joined to the respective first component by a discontinuous joint. Preferably, each first component of the system has a corresponding second component joined thereto by a discontinuous joint.

The present disclosure provides an improved cogwheel permitting enhanced meshing of cogwheels when operating perpendicularly. Exemplary embodiments introduce a multi-cogwheel design with specific dimensions and tooth profiles to permit perpendicular engagement of cogwheels whilst permitting translation of such cogwheels.

A first differential bevel gear or equalizing bevel gear, suitable for a bevel gear differential in a vehicle, having a cone-shaped toothed section with external toothing having a plurality of teeth having a head height coefficient of at least 1.1. The bevel gear differential may further include a second differential bevel gear mating with the equalizing bevel gear and molded as an axle shaft gear, wherein teeth of the axle shaft gear have a head height coefficient of at least 1.2, and wherein a total coverage of the equalizing bevel gear and axle shaft gear is in the range of 1.5 to 2.0. Furthermore, a manufacturing method for the differential bevel gear is disclosed.

In a gear pair in which a first gear and a second gear having a greater number of teeth than the first gear share a meshing line of teeth that mesh with each other, at least a part of the meshing line includes a region where a pressure angle is not constant, the pressure angle monotonously decreases in a section of the meshing line from a pitch point to an end point on a tooth-top side of the first gear, and a relative curvature of tooth profile curves of the first and second gears in the section of the meshing line from the pitch point to the end point on the tooth-top side of the first gear is smaller than or equal to a maximum value of the relative curvature in a section from the pitch point to an end point on a tooth-root side of the first gear.

A differential for use in a vehicle drive train having a pair of rotary members including a gear case that is operatively supported in driven relationship with respect to the drive train and a pair of side gears mounted for rotation with a respective one of the rotary members in the gear case. The differential also includes a spider mounted for rotation with the gear case and at least one pair of pinion gears mounted for rotation with the spider and in meshing relationship with the side gears. The side gears have concave teeth flanks and the pinion gears have convex teeth flanks to increase power density through the differential.

In a worm, a cutting start part forming one end part of a tooth bottom part is provided at a first tapered part. A cutting end part forming another end part of the tooth bottom part is provided at a second tapered part. The tooth bottom part extends to advance in a spiral shape from the cutting start part toward one circumferential side (counterclockwise direction) of the worm. A position of the cutting end part is configured within an angle range (at a position of 38 degrees) of less than 90 degrees on another circumferential side (clockwise direction) of the worm with respect to a position of the cutting start part, centered on a rotation center (equal to a rotation center of a rotating shaft) of the worm.

A first differential bevel gear or equalizing bevel gear, suitable for a bevel gear differential in a vehicle, having a cone-shaped toothed section with external toothing having a plurality of teeth having a head height coefficient of at least 1.1. The bevel gear differential may further include a second differential bevel gear mating with the equalizing bevel gear and molded as an axle shaft gear, wherein teeth of the axle shaft gear have a head height coefficient of at least 1.2, and wherein a total coverage of the equalizing bevel gear and axle shaft gear is in the range of 1.5 to 2.0. Furthermore, a manufacturing method for the differential bevel gear is disclosed.