Abstract: A speed change device comprising an inner race having an outer surface, an outer race having an inner surface, and set of orbital rollers including inner rollers in rolling contact with the outer surface of the inner race and outer rollers in rolling contact with the inner surface of the outer race.

Abstract: The present invention relates to a reduction gearing with a ring gear, at least one planet gear rolling around in the ring gear and having a planet gear axis, and an output being rotatably mounted coaxially to the ring gear. According to the invention, it is provided that the planet gear comprises a guide member that is spaced apart from the planet gear axis and describes a hypocycloid relative to the ring gear when the planet gear rolls around, wherein guidance is provided between the guide member and a cam disk of the output, such that the output experiences a drive motion by the planet gear rolling around.

Abstract: The pinion gear assembly thus includes a first and a second pinion gear arranged with generally parallel axes of rotation. A first and a second washer, referred to herein as stationary washers, are provided. Each of the washers has two openings spaced to generally align with two predetermined, spaced mounting locations on the planet carrier member. The first and the second washers are positioned on opposing sides of the first and second pinion gears, with the axes of rotation of the first and second pinion gears generally centered at the respective spaced openings of the washers. Because the stationary washer spans the two pinion gears, which are secured to the carrier member, the stationary member is operatively connected at two locations to the carrier member, eliminating the need for anti-rotation features and corresponding carrier features.

Abstract: A gear mechanism for the drive assembly of a heald shaft (1), wherein the gear mechanism (6, 6a, 6b, 6c) comprises an input shaft (7, 7b, 7c) and an output shaft (5, 5b, 5c). The gear mechanism (6, 6a, 6b, 6c) generates a differential angle of rotation between the input shaft (7, 7b, 7c) and the output shaft (5, 5b, 5c) that is superimposed on the angle of rotation and, in dependence on the angle of rotation, is subjected to an oscillating change. This oscillating change can differ from a harmonic oscillation as a result of the non-circular design of the planet gears (11a, 12a, 13a) of the gear mechanism (6, 6b, 6c), thereby making it possible to realize almost any optional movements for the heald shaft (1), with low strain on the gears and the bearings. A simple production method and a compact design are disclosed.

Abstract: The invention relates to a device (1) for the electrical adjustment of the relative rotary-angle position between a camshaft (2) and a crankshaft of an internal combustion engine, with an adjusting gear (3) which has a driving part (4) fixed with respect to the crankshaft, a driven part (5) fixed with respect to the camshaft and an adjusting shaft (8) connected fixedly in terms of rotation to an adjustment-unit shaft (6) of an electrical adjustment unit (7). In order to achieve a simpler type of construction which, moreover, is distinguished by quiet running, there is provision, according to the invention, for the adjusting shaft (8) to be arranged in a radially floating manner.

Abstract: A dual planetary gear transmission having two planetary gear sets rotatably mounted on a common grounded axle wherein sun gears span both planetary gear sets providing a system for gear movement to be transferred between both gear sets whereby additional input allows modification to a differential relationship between the main transmission members. The disclosed transmission has many applications, including integration within a weight-generating device.

Abstract: A micro gear system, operating according to the principle of a strain wave gear system, a Wolfrom gear system, or a similar planetary gear system comprises at least one sun wheel (14) and at least two planet wheels (16) meshing with the sun wheel (14). The sun wheel (14) is rotatably fixed to drive shaft (20) placed along a longitudinal axis (18) of the gear system. The planet wheels (16) indirectly or directly mesh with a toothing which is rotatably fixed to a drive shaft (28) placed centrally along the longitudinal axis of the gear system. The drive shafts (20,28) are embodied as hollow shafts (30,32) having continuous bore holes (34,36) such that information or fluid media can be directed through the gear system. A sealing system (42) comprising a labyrinth seal (44) which includes a plurality of annular grooves (46) is disposed between the hollow shafts (30,32).

Abstract: An integrated speed reducer and gerotor pump is disclosed. The device comprises a motor, a speed reducer, and a gerotor pump. The motor provides torque at an elevated speed. The speed reducer is coupled with the motor and converts the torque at an elevated speed into torque at a reduced speed. The gerotor pump is coupled with the speed reducer and uses the torque at the reduced speed for pumping fluids.

Abstract: An eccentric reduction gear for a vehicle window winder system has a ring gear, a planet pinion that is eccentric relative to the ring gear, a drive component that drives the planet pinion and the ring gear so that they roll relative to each other, and a winding drum attached to the planet pinion. A transmission component is wound around the winding drum and drives a vehicle window. The reduction gear provides a high reduction ratio in a small space and also ensures that the movement cannot be reversed.

Abstract: A web unit for planet gear sets for the mounting of planet gears including a first web element and a second web element, which are tightly connected and can be tensioned in axial direction by transmission or connecting elements progressing in axial direction and describing a theoretical connecting axis. Each transmission or connecting element has regions of differing radial dimensions, the front faces of the regions, thus formed and facing the individual web elements, form a first and a second contact surface, resting either directly or through an intermediate element against the contact surfaces in contact regions, formed by the front faces of the web elements facing each other. At least one element forming a contact surface of a contact region includes a profile. The profile is characterized in the radially external region by at least one region of greater axial extension in the direction of the theoretical connecting axis.

Abstract: A planet gear has an input axle (1a), an outer ring (4) which presses planet wheels (6) radially against a central sun axle (2), the planet wheels (6) being rotatably mounted on stays (7), the diameters of which are smaller than the holes in the planet wheels (6). The input axle (1a) has a driver (1) with holes (3) for studs (5) on the outer ring (4), so that the rotation of the input axle (1a) is transferred via the driver (1) and the outer ring (4) to the planet wheels (6) and to the sun axle (2), whereby the stays (7) for the planet wheels (6) are disposed in such a manner that when the applied moment increases, the planet wheels (6) are pressed harder against the sun axle (2) and the outer ring (4) is similarly pressed harder against the planet wheels (6).

Abstract: A friction-roller speed changer has three intermediate rollers (12a, 12b, 12c). Two rollers (12a, 12b) of which act as a wedge roller and can be moved into the narrower area of an annular space (10) by the transmission of power, wherein during power transmission from the input side in the normal state to the output side. The other intermediate roller (12a or 12b), which does not act as the wedge roller, moves into the wider area of the annular space (10) against the elastic force of the spring (14) whereby transmission efficiency for bidirectional rotation is maintained while preventing backflow of power.

Abstract: A differential drive having a differential carrier rotatably supported in a differential housing is disclosed. Two axle shaft gears are rotatably held in cylindrical bores in the differential carrier and are arranged coaxially relative to one another. A plurality of differential gears are supported in an axis-less way in bores in the differential carrier and are arranged so as to be axis-parallel. One group of the differential gears engages the one of the axle shaft gears and the other group engages the other of the axle shaft gears. At least one of the group of the differential gears engages the respective other group of the differential gears. At least the tooth heads of the differential gears are provided with grooves, with at least the bores or pockets for the differential gears in the differential carrier being provided with grooves.

Abstract: A differential drive has a drive housing in which a drivable differential carrier (1) is rotatably supported. The differential carrier accommodates straight-toothed and helically toothed output gears (4, 5). The gears (4, 5) are connected to each other via differential gears (12, 13). A first group of differential gears (12) engages one of the output gears (4), with a second group of differential gears (13) engaging the other output gear (5). Each of the differential gears (12) of the one group engage at least one of the differential gears (13) of the other group. The teeth of the output gears (4, 5) are held in cylindrical apertures (6, 7) of the differential carrier (1). Also, the differential carrier, at least at one end, is indirectly supported in the drive housing via one of the output gears (4) or an output shaft (24) connected thereto.

Abstract: A propelling mechanism for traveling through piping comprises: a motive power device; a plurality of sun gears driven in rotation by the motive power device; at least two planet gears meshed with each one of the sun gears and rotatably supported at specifically spaced-apart positions to undergo axial rotation about their own axes and simultaneously to undergo orbital revolution around the periphery of that sun gear; and a plurality of traction wheels with treads rotating together with respective planet gears, the treads being pressed into contact with the inner wall surface by the orbital revolution of the planet gears, driving power due to the axial rotation of the planet gears being transmitted by way of the treads of the wheels as traction to the inner wall surface.

Abstract: An improved planetary gear box for a heavy duty truck jack which includes a planetary gear box that provides high torque and in-line input and output shafts and a high gear ratio and a compact package which does not require many precision machine parts. The invention uses parts formed by stamping rather than machining and uses a floating ring gear which can move relative to the housing, thus, allowing a stamped ring gear to be utilized. Floating planetary gears are used by providing slotted carriers whic allow the planet gears to float which eliminates concentric problems with the planet gears and the carrier assembly. The invention allows the use of a stamped housing and the rear carrier of the planet gears is staked to the drive pilot of the jack screw. The invention results in an improved and less expensive jack than utilized in the prior art.

Abstract: A rotary hinge actuator, for instance for rotating a wing flap relative to a wing in an aircraft, has a sun gear, several spindle gears around the sun gear and several annular gear sleeves around the sun gear and spindle gears. Each spindle gear has sections with external helical gear teeth which are slanted in the same direction and which respectively mesh with internal helical gear teeth on the annular gear sleeves. At least one of the sleeves is connected to the wing and at least another to the wing flap. Upon rotating the spindle gears the wing flap is rotated relative to the wing.