Disclosed in the present invention is a transmission mechanism, comprising an outer wheel, an inner wheel, an eccentric shaft, a first flange body, a rotating shaft and a planetary gear device. The inner wheel is provided in the outer wheel and is engaged with the outer wheel. The eccentric shaft can rotate around a central axis; an eccentric portion, eccentric shaft outer teeth and a first support portion are provided on the periphery of the eccentric shaft; and the inner wheel is provided around the eccentric portion. The first flange body and the inner wheel are provided side by side, and the first flange body is provided around the first support portion. The rotating shaft has rotating shaft external teeth. The planetary gear device is supported by the first flange body, and a first row of planetary teeth engaged with the rotating shaft outer teeth and a second row of planetary teeth engaged with the eccentric shaft outer teeth are provided at the periphery of the planetary gear device. The transmission mechanism can provide a wide range of speed ratios and reduce production costs.

A transmission device capable of cooperating with a dual-power source and a driving method therefor, the transmission device includes a planetary gear assembly that is driven by the dual-power source; the planetary gear assembly comprises a sun gear, a rotating inner gear ring, and a planetary gear that is engaged between the sun gear and the rotating inner gear ring; the dual-power source comprises an input shaft, the input shaft being connected to the sun gear. The direction of the rotational movement of the planetary gear about the input shaft depends on the linear velocity V1 of pitch circle movement of the rotating inner gear ring and the linear velocity V2 of pitch circle movement of the sun gear.

The present invention relates to a cycloidal speed reducer and a manufacturing method thereof, and more particularly, to a thin cycloidal speed reducer and a manufacturing method thereof that are capable of achieving a thin structure through an input member with a hollow portion.

A motor unit having a motor shaft, and a speed reduction mechanism connected to the motor shaft are included. The speed reduction mechanism includes a sun gear unit disposed on the motor shaft, planetary gear units meshing with the sun gear unit and arranged in the circumferential direction, a carrier at least a part of which surrounds the planetary gear units, and an output unit connected to the planetary gear units. The carrier includes a first cylindrical portion disposed outward of and above the sun gear unit and extending in the axial direction. The first cylindrical portion rotatably supports the output unit via a bearing, and the bearing is at least partly disposed radially inward of the radially outer end of the planetary gear unit.

A reducer for high precision control includes a pin gear housing and two-stage reduction components disposed therein: a first-stage reduction component including an input shaft, a sun gear and a planet gear; and a second-stage reduction component including 2-3 eccentric shafts distributed uniformly, cycloidal gears, a pin, a left rigid disk and a right rigid disk, and bearings, wherein the cycloidal gears are supported by bearings on two eccentric sections of the eccentric shaft, shaft extensions on two sides of the eccentric section of the eccentric shaft are supported by bearings on the left rigid disk and the right rigid disk, and the left rigid disk and the right rigid disk are supported by bearings in inner holes of two sides of the pin gear housing.

A planetary gear for a planetary gearset has a gear body and a planetary gear shaft defining a planetary gear rotational axis (APR) of the planetary gear. The gear body includes a gear rim having a first number (n1) of teeth and a second number (n2) of ribs. The ribs extend between the planetary gear shaft and the gear rim, and planetary gear contact projections are arranged on the ribs and project beyond the gear rim along the planetary gear rotational axis (APR). Also disclosed is a planet carrier for such a planetary gear, including an insert for removing torque from the carrier body, which insert is connected to the first disk-shaped body. The first disk-shaped body forms a first free planet carrier face on which a number of reinforcing ribs are arranged.

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).

Disclosed herein are actuator, planetary-gear apparatus, and structural-unit embodiments configured to reduce noise and vibration caused by operation of planetary gears. An embodiment may include a ring gear having an outer peripheral surface that extends in the axial direction. A first raised portion may be formed on said outer peripheral surface; and a housing having an inner peripheral surface that is provided facing, and with a gap from, the outer peripheral surface of the ring gear. A second raised portion may be formed on said inner peripheral surface. Movement of the ring gear in the circumferential direction is limited by linear contact or point contact between the first raised portion and the second raised portion, for example. The outer peripheral surface and/or the inner peripheral surface may be a surface of a crowned shape that is bowed in the outer radial direction, according to some further embodiments.

A circular wave drive system is provided. In one aspect, the drive comprises: a compliant input ring gear, wherein input ring gear includes internal input ring gear teeth; an input cycloidal disc having an outer surface, wherein the input cycloidal disc includes external input cycloidal disc gear teeth, and wherein the external gear teeth engage the internal gear teeth; a compliant primary drive gear having an outer surface, wherein the primary drive gear includes external primary drive gear teeth; an eccentric motion generator having an eccentric portion and a non-eccentric portion and wherein a centerline of the eccentric portion and the non-eccentric portion are offset, and wherein the eccentric motion generator includes a hollow central bore; and an output cycloidal disc, wherein the output cycloidal disc includes internal output cycloidal disc teeth, and wherein the internal output cycloidal disc teeth engage the external primary drive gear teeth.

An electronic shift lever is provided and includes a housing which accommodates various components therein. A motor unit generates a driving force and a reduction unit is connected to the motor unit. The reduction unit is configured to increase the driving force generated from the motor unit. The motor unit and the reduction unit are accommodated inside the housing and are formed integrally with each other.