The p recessional gear transmission comprises a body, a satellite wheel with two bevel gear rings driven by a crankshaft in sphero-spatial motion around a fixed point, two central bevel wheels, one immobile fixed in the body and the other mobile mounted on a driven shaft. The teeth of the gear rings have a circular arc flank profile, those of the central bevel wheels are variable curvilinear. The configuration of the parameters of angles, the number of teeth, the ratio of the numbers of teeth of the mating wheels in the gears and the radius of the circular arc of the teeth profile of the gear rings determines the geometry and the kinematics of the contact of the teeth, the degree of frontal overlap, expressed by the number of simultaneously engaged pairs of teeth and defines the pressure angle between the mating flanks.

Pericyclic transmission having at least one input shaft (58) rotatable about an axis of rotation and at least one inclined bearing seat (55, 56) secured to the input shaft with the inclined bearing seat being oriented at an inclination angle with respect to the axis of rotation of the input shaft. An input gear (52, 54) is attached to each inclined bearing seat with the input gear being oriented at the inclination angle and having an axis of rotation inclined to the axis of rotation of the input shaft by the inclination angle whereby upon rotation of the input shaft, the input gear performs at least a nutating motion. The transmission also includes an intermediate gear (51, 53) in mesh with the input gear with the intermediate gear having an axis of rotation coincident with the axis of rotation of the input shaft. The intermediate gear communicates with a transmission output.

A speed reduction assembly for an electric vehicle includes an electric machine configured to operate as a motor and as a generator. The electric machine includes an output shaft that is rotatable about a longitudinal axis at an output speed. The assembly also includes an output member coupled to the output shaft and rotatable about the longitudinal axis at a reduced speed. In addition, the assembly includes a pericyclic apparatus coupled to the output shaft and the output member to reduce the output speed of the output shaft to the reduced speed of the output member. A vehicle may include the speed reduction assembly in certain configurations. The vehicle includes a battery module and the electric machine is in electrical communication with the battery module to recharge the battery module when the electric machine operates as the generator.

A speed-reducing or -increasing apparatus, with first and second crown gears facing one another, with a cam unit that causes the first crown gear to incline with respect to the second crown gear so that the first crown gear meshes with the second crown gear, that causes the first crown gear to precess in such a manner as to move the meshing position, and couples to an input or output shaft. A rolling element is between the cam unit and the first crown gear, and the cam unit includes a first member that couples to the input or output shaft and a second member made of steel and including a rolling element rolling portion where the rolling element rolls, the second member configured to be incapable of rotating relatively to the first member, and at least part of the first member having a lower specific gravity than the second member.

A mechanical reducer with high reduction ratio, includes a box-like case (C), an input shaft (I), rotatably supported by the case and adapted to be brought into rotation at an input angular speed (VI), and an output shaft (U), mechanically connected to the input shaft via reduction members (1) and adapted to provide an output angular speed (VU) that is reduced with respect to the input speed. In the reducer device (300), the reduction members include: an input movable drive group (310), conducted in rotation by the input shaft and including one first secondary toothed wheel (Z2) and one second secondary toothed wheel (Z3) integral therewith; a reference fixed drive group (320), including a reference toothed wheel (Z1) which engages the first secondary toothed wheel; an output movable drive group (330), mechanically connected to the output shaft and including an output toothed wheel (Z4) which engages the second secondary wheel.

The invention describes a device for winding/unwinding a link, comprising: an input shaft (10) and a hollow through output shaft (20), the two shafts being coaxial and movable in rotation about a longitudinal axis (L), a permanent magnet synchronous motor (30) comprising a rotor (31) integral in rotation with the input shaft (10), a cycloidal reducer (50) comprising an eccentric cam (51) mounted integral in rotation with the input shaft (10), and a cycloidal disc (52) mounted integral in rotation with the cam (51), in such a way that a rotation of the cam (51) about the longitudinal axis (L) drives a rotation of the cycloidal disc (52) in an eccentric and cycloidal movement, and a transmission member (60) suitable for transmitting an angular displacement of the cycloidal disc (52) to the output shaft (20).

A gear reduction assembly includes a gearbox, a stationary gear, an input shaft, a rotary gear, and an output shaft. Wherein the stationary gear having a first flange and anchoring in the gearbox. The input shaft passes through the stationary gear coaxially. One end of the input shaft is disposed a bearing sleeve, and the axis of the bearing sleeve is eccentrically deployed to the axis of the input shaft. The bearing sleeve is associated with the rotary gear by a bearing. The rotary gear having a drive pin and a second flange meshed to the first flange, and the teeth number of the first flange is unequal to the teeth number of the second flange. One end of the output shaft is a hub pivoted to the drive pin. By above-mentioned gear reduction assembly can make superior decelerating effect with compact components.

Disclosed is a precision rotational transmission mechanism, comprising a fixing support (1), wherein the fixing support (1) is provided with a rotational case (112), which is connected to an electric motor and is provided with a first transmission mechanism (1122), a second transmission mechanism (33) and an output member (10) therein, an end of the first transmission mechanism is connected to motor, the other end is connected to the second transmission mechanism, and the second transmission mechanism drives the rotational case to rotate simultaneously via the output member. The transmission mechanism has a simple and compact structure, has a larger output shaft which has bigger rigidity and can output from two ends has a lighter overall weight which is suitable for industrialization and mass production, has a large transmission ratio, high transmission efficiency, small return difference, strong carrying capacity, strong impact resistance capacity, and long service life.

A wobble plate drive system may include a stator having a central axis, an upper surface perpendicular to the central axis, and a plurality of stator teeth disposed on the upper surface. The system may further include a wobble plate having a wobble axis disposed at a non-zero angle relative to the central axis, a lower wobble surface perpendicular to the wobble axis, and an upper wobble surface perpendicular to the wobble axis. A plurality of lower wobble teeth may be disposed on the lower wobble surface and a plurality of upper wobble teeth may be disposed on the upper wobble surface. The system may include an output gear having an output axis substantially aligned with the central axis and a lower surface perpendicular to the output axis. A plurality of output teeth may be disposed on the lower surface. The wobble plate may be configured to rotate as it nutates around the stator.

An example transmission includes a first pericyclic motion converter to wobble at an angle relative to a first reaction control member and a first output shaft gear. The first pericyclic motion converter having gear teeth to engage a portion of gear teeth at a circumference of the first reaction control member to provide a first gear mesh and to engage a portion of gear teeth at a circumference of the first output shaft gear to provide a second gear mesh. A second pericyclic motion converter wobbles at an angle relative to a second reaction control member and a second output shaft gear. The second pericyclic motion converter having gear teeth to engage a portion of gear teeth at a circumference of the second reaction control member to provide a third gear mesh and engage a portion of gear teeth at a circumference of the second output shaft gear to provide a fourth gear mesh.