A transmission arrangement with a first rotatably mounted drive-side shaft paired with a first drive toothing; a second rotatably mounted drive-side side shaft paired with a second drive toothing; a rotatably mounted ouput-side shaft paired with an output toothing; a first number of first planet shafts, each of the first planet shafts being paired with a first planet toothing and a third planet toothing; and a second number of second planet shafts, each being paired with a second planet toothing and a fourth planet toothing. The first drive-side shaft and the second drive-side shaft are coaxially relative to each other; the first planet toothing engaged with the first drive toothing; the second planet toothing engaged with the second drive toothing; and the third planet toothing and the fourth planet toothing are engaged with the output toothing.

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 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 planetary drive includes static and freely rotating outer rings having different diameters, sun gear, and multiple planet gears disposed around the sun so that their axis of rotation is rotated relative to the drive axis, causing each planet to contact each ring at a point along its length. The sun contacts each planet at a point between its contact points with the rings, such that the force at the contact points is enough that the resulting traction can transmit torque with minimal backlash. A carrier supports the planets such that each can rotate about both its own axis and the drive axis. There may be involute teeth or other surface features on parts of the rings, planets, and sun. In a sun-less configuration, the drive is actuated by the carrier. In a single-stage version, the freely rotating ring is absent and output is obtained from rotation of the carrier.

A planetary drive includes static and freely rotating outer rings having different diameters, sun gear, and multiple planet gears disposed around the sun so that their axis of rotation is rotated relative to the drive axis, causing each planet to contact each ring at a point along its length. The sun contacts each planet at a point between its contact points with the rings, such that the force at the contact points is enough that the resulting traction can transmit torque with minimal backlash. A carrier supports the planets such that each can rotate about both its own axis and the drive axis. There may be involute teeth or other surface features on parts of the rings, planets, and sun. In a sun-less configuration, the drive is actuated by the carrier. In a single-stage version, the freely rotating ring is absent and output is obtained from rotation of the carrier.

This mechanism for driving motions of a surface of spherical, ellipsoidal, plane, or other shape comprises a pair of drive wheels mounted on a freely pivoting frame, each wheel being driven by its own bidirectional motor. The motors and the active electronics of an angle encoder are mounted in an associated fixed frame, so no slip rings or other rotating connections are needed for motor power and control, or for determining the rotation angle of the pivoting frame. Control of the motors provides differential rotation of the two wheels to effect controlled rotation of the pivoting frame, and therefore of wheel direction. This avoids the use of a separate motor for changing the direction of motion of the surface. All parts of the mechanism driving wheel rotation are enclosed by the pivoting frame or the fixed frame.

A drive assembly is provided and includes a rotatable housing, a motor disposed within and to rotate with the housing, the motor including a drive element and first and second drive shafts, which are independently rotatably drivable by the drive element, a first drivable element coupled to the first drive shaft such that rotation thereof is transmitted to the first drivable element and configured to propel the housing in a first direction during first drive shaft rotation and a second drivable element coupled to the second drive shaft such that rotation thereof is transmitted to the second drivable element and configured to propel the motor in a second direction, which is transversely oriented relative to the first direction, relative to the housing during second drive shaft rotation.

An axle assembly having a drive pinion assembly. The drive pinion assembly may have a drive pinion body, a pinion gear, and a side gear. The pinion gear may be fixedly disposed on a first end portion of the drive pinion body. The side gear may be fixedly disposed on a second end portion of the drive pinion body.

A drive assembly is provided and includes a rotatable housing, a motor disposed within and to rotate with the housing, the motor including a drive element and first and second drive shafts, which are independently rotatably drivable by the drive element, a first drivable element coupled to the first drive shaft such that rotation thereof is transmitted to the first drivable element and configured to propel the housing in a first direction during first drive shaft rotation and a second drivable element coupled to the second drive shaft such that rotation thereof is transmitted to the second drivable element and configured to propel the motor in a second direction, which is transversely oriented relative to the first direction, relative to the housing during second drive shaft rotation.

The rotational motion transmission unit/mechanism for non-parallel axes (100) comprises of at least one driver (110) and a driven (120). The driver (110) has at least one guide (113) on it that curls around a driver axis (111) with an axial lead. The driven (120) rotates around its axis (121) that is non-parallel to driver axis (111) and has at least one follower (122) that is engage able with at least one guide (113) of the driver (110). When the driver (110) rotates around its axis (111), the guide (113) leads the engaged follower (122) of the driven (120) in an arc resulting in rotation of the driven (120). The driver (110) and the driven (120) can rotate continuously in synchronization.