A trim ring gear for use in an integrated drive generator has a ring gear body extending between a first end and a second end. Outer gear teeth are formed on an outer surface, and inner gear teeth are formed on an inner surface. The outer tooth roll angle at A is between 16.0 and 17.5, at B is between 17.5 and 190, at C is between 22.0 and 23.5, and at D is between 23.0 and 24.5. The inner tooth roll angle at A is between 31.5 and 33.0, at B is between 30.0 and 31.5, at C is between 25.5 and 27.0, and at D is between 24.0 and 25.5. An integrated drive generator, and a method of replacing the trim ring gear are also disclosed and claimed.

The present disclosure discloses an automatic clutch winch comprising a motor, a gear reduction unit actuated by the motor, and a winding drum drivably coupled with the gear reduction unit. The gear reduction unit comprises a planetary gear assembly drivably coupled with the winding drum, a movable ring gear engaging with the planetary gear assembly, a DC gear motor, a cam driven by the DC gear motor to rotate, and a pull rod driven by the cam. The pull rod is driven by the cam on a first end to enter or exit a notch of a plurality of notches in the movable ring gear. The disclosed automatic clutch winch can provide protection for the internal components during an emergent situation.

A ring gear for a planetary gear set has an annular gear body with a first annular side and a second annular side concentric about a center axis. The first annular side defines a toothed periphery. The gear body may include an annular groove in the first annular side proximate a first axial side of the gear body. An axial flow passage section may extend axially into the gear body from the annular groove without intersecting the first and second annular sides. A radial flow passage section extends radially into the gear body from the second annular side to the axial flow passage section.

A gear pair including at least one first gear with a microstructure and at least one additional gear is provided. The first gear has first teeth with first tooth flanks and the additional gear has additional teeth with additional tooth flanks. In order to transfer power from the first gear to the additional gear, a first tooth flank contacts an additional tooth flank on an imaginary tangential plane which touches both tooth flanks in a contact point. The addition of the speeds of the two tooth flanks in the contact point on the tangential plane produces a sum speed. The microstructure is designed as a depression on the first tooth flank and runs at least partly along a structure line on the first tooth flank, and the structure line is touched by a structure tangent in the contact point. The structure tangent lies on the tangential plane.

An optimized harmonic drive (OHD) is disclosed. The OHD includes a wave generator, a flex spline, and a circular rigid spline. The wave generator includes a wave generator contour that minimizes a velocity profile of the wave generator during a high load condition. The flex spline is attached to the wave generator and the circular rigid spline is mechanically engaged to the flex spline. The flex spline includes a plurality of flex spline teeth and the circular rigid spline includes a plurality of rigid spline teeth. The plurality of rigid spline teeth is greater than the plurality of flex spline teeth and the high load condition exists when the rigid spline teeth of the plurality of rigid spline teeth are fully engaged with flex spline teeth of the plurality of flex spline teeth.

A ring gear used in a mechanical exfoliation apparatus having a plurality of canisters to hold particulate material and media is provided. The ring gear having an inside surface, an outside surface, a front face, and a back face. The inside surface defining a plurality of beveled gear teeth and the outside surface defining a plurality of recesses that are configured to accommodate the plurality of canisters of the mechanical exfoliation apparatus.

A gear device includes a resin gear that is formed of a first resin material, and a connected member that is formed of a second resin material and that is connected to the resin gear, in which the first resin material is a fiber-reinforced resin obtained by filling a first base material resin with first reinforcement fibers, the second resin material is a fiber-reinforced resin obtained by filling a second base material resin with second reinforcement fibers, and a fiber content ratio of the second reinforcement fibers in the second resin material is higher than a fiber content ratio of the first reinforcement fibers in the first resin material.

It has been found that duplex monolithic parts can be manufactured in high volume at low cost by using powder metal technology to mold and sinter an inner component of the part into an outer component of the part. This technique reduces the cost of manufacturing intricate metal products by taking advantage of the attributes of powder metal technology in making the inner component of the part. The outer component of the part can be wrought machined, stamped or forged, or made by double press double sinter or forging a powder metal component of the part. In any case, this technique can beneficially be used in making a wide variety of toroid parts, such as gears, clutches, sprags, bearing races, one-way diodes, and the like.

A bending meshing type gear device includes a wave generator, a bending gear that is bent and deformed by the wave generator, and a meshing gear that meshes with the bending gear, in which the meshing gear is formed of a first resin having a glass transition point lower than about 140? C., the bending gear is formed of a first high thermal conductivity material having higher thermal conductivity than the first resin, and the wave generator is formed of a second high thermal conductivity material having higher thermal conductivity than the first high thermal conductivity material.

A transmission is described, comprising a hollow cylindrical base body (1) with a first internal gear (z1), a ring with a second internal gear (z2) arranged rotatably about the cylinder axis (14) of the base body (1), a central shaft (9) extending along and rotatable about the cylinder axis (14) and having an eccentric section (13), and a wheel (11) rotatably mounted on the eccentric portion and first external gear (zs1) via which it meshes with the first internal gear (z1) of the base body (1) and a second external gear (zs2) via which it meshes with the second internal gear (z2) of the hollow cylindrical ring.

The wheel (11) is designed as a double wheel. The double wheel comprises two individual wheels which are non-rotatably connected to each other in accordance with their axes and are each provided with one of the two external gears (zs1, zs2). The single wheels are connected to each other by bonded connecting means. The connecting means are bonded to both one and the other individual wheel.