The wave generator of a strain wave gearing is provided with an ellipsoidally contoured wave generator plug and a wave generator bearing. The wave generator bearing is provided with an annular body fitted between inner and outer races in a sliding contact state. The annular body is composed of an endless coil spring and has a rigidity that is able to maintain a constant gap between the inner and outer races. The annular body also has a specified overall flexibility in the radial direction so that the annular body can be flexed into an ellipsoidal shape by the wave generator plug. Since sliding occurs between the annular body and the inner race when the wave generator plug rotates, it is possible to generate a wave motion in an externally toothed gear with a small rotational torque.

The wave generator of a strain wave gearing is provided with an ellipsoidally contoured wave generator plug and a wave generator bearing. The wave generator bearing is provided with an annular body fitted between inner and outer races in a sliding contact state. The annular body is composed of an endless coil spring and has a rigidity that is able to maintain a constant gap between the inner and outer races. The annular body also has a specified overall flexibility in the radial direction so that the annular body can be flexed into an ellipsoidal shape by the wave generator plug. Since sliding occurs between the annular body and the inner race when the wave generator plug rotates, it is possible to generate a wave motion in an externally toothed gear with a small rotational torque.

A bearing assembly of a hinge coupling first and second components includes an outer ring secured to the second component having an axial primary bore with a primary inner surface. An inner ring axially rotates, and has a primary outer surface rollingly contacting the primary inner surface, defining a primary sliding path with a primary friction coefficient. The inner ring includes a secondary axial bore with a secondary inner surface. An inner shaft in the secondary bore is secured to the first component and is axially rotatable. The inner shaft has a secondary outer surface rollingly contacting the secondary inner surface defining a secondary sliding path with a second friction coefficient. One of the sliding paths has a triboelectric layer surface frictionally generating an electrical current when that sliding path is engaged. A transmission element transmits, to a failure detection system, a signal due to such electrical current.

A journal bearing comprising a central member and at least a first end member separated from the central member by a first undercut having an undercut diameter U1, an outer cylindrical surface of the first end member being axially spaced from an outer cylindrical surface of the central member, wherein the outer cylindrical surface of the first end member has a diameter A, the outer cylindrical surface of the central member has a diameter B, and wherein diameter B is greater than diameter A, and diameter A is greater than diameter U1.

Provided are a suspension bush and a suspension device that are able to achieve both steering operability and stability of a vehicle at the time of turning. A projection portion is formed on the outer circumference of an inner cylinder. A guide is formed on the inner circumference of an outer cylinder. In the guide, a slit is formed along an extending direction that includes: a component, in a parallel direction, which runs parallel with an axial line; and a component in a circumferential direction around the axial line. The projection portion is disposed in the slit, and a threaded mechanism is formed by the projection portion and the slit.

An apparatus for use in a drill string configured for use in a subterranean formation includes a drive shaft coupled to a drill bit, the drill bit configured to continuously rotate and penetrate within the subterranean formation, a drill string housing that houses the drive shaft, the drive shaft continuously rotating within the drill string housing relative to the drill string housing, and a bearing assembly configured bear the drive shaft within the drill string housing, the bearing assembly comprising a first bearing surface having a first curvature.

An assembly including an inner member; an outer member; and a bearing including a bearing sidewall including a flat portion, a first convex axial end, and a second convex axial end, where at least one of the inner member or the outer member is adapted to axially translate relative to the bearing, and where at least one of the first convex axial end or the second convex axial end is adapted to induce formation of a film on the bearing sidewall during the axial translation of at least one of the inner member or the outer member.

The invention relates to an exhaust-gas-driven turbocharger having a hydrodynamic plain bearing having a rotor and a stator, the rotor being rotatable with respect to the stator, the rotor bearing surface being located opposite a counter-surface of the stator in order to generate hydrodynamic pressure in the region of a converging gap. In such a hydrodynamic plain bearing, the application properties can be improved by the fact that the rotor bearing surface and/or the counter-surface constitutes in a section view, in the context of a section along and through the rotation axis, a continuous bearing contour that is constituted from convex or concave curvatures and/or from at least two contour segments that are embodied as straight lines and/or curvatures. The invention also relates to a hydrodynamic plain bearing or bearing arrangement having such a plain bearing.

The invention relates to an exhaust-gas-driven turbocharger having a hydrodynamic plain bearing having a rotor and a stator, the rotor being rotatable with respect to the stator, the rotor bearing surface being located opposite a counter-surface of the stator in order to generate hydrodynamic pressure in the region of a converging gap. In such a hydrodynamic plain bearing, the application properties can be improved by the fact that the rotor bearing surface and/or the counter-surface constitutes in a section view, in the context of a section along and through the rotation axis, a continuous bearing contour that is constituted from convex or concave curvatures and/or from at least two contour segments that are embodied as straight lines and/or curvatures. The invention also relates to a hydrodynamic plain bearing or bearing arrangement having such a plain bearing.

A transmission in particular for wind power generators, with an epicyclic planetary gear arrangement having a sun gear, a ring gear, multiple planet gears and a planet carrier. The planet gears have planet gear teeth in mesh with sun gear teeth and ring gear teeth. Each planet gear is rotatably mounted via a radial slide bearing on a planet pin that is non-rotatably connected to the planet carrier. Each slide bearing includes a bearing hub positioned between the planet pin and the planet gear, which is non-rotatably connected to the planet pin. Between the bearing hub and the planet pin an annular support is formed, which seen in the axial direction has a smaller dimension than the bearing hub and/or a smaller dimension than the planet gear teeth of the planet gear.