A planetary gear mechanism includes a sun gear rotatable about an axis, a first shaft that is fixed to the sun gear and is rotatable integrally with the sun gear, a plurality of planetary gears that mesh with the sun gear and are rotatable about a center line thereof parallel to the axis, an internal gear that includes internal teeth facing inside in a radial direction to mesh with the planetary gears and is rotatable about the axis, a second shaft that extends in the axial direction to be connected to the internal gear and rotates about the axis together with the internal gear, and a reinforcing member that is fixed to an outer peripheral surface of the internal gear and is formed in an annular shape of a material having a higher specific strength than that of a material forming the internal gear.

The present disclosure provides a reducer gear for robot, and a method for generating the gear and a reducer therewith. The reducer gear comprises: an outer contour layer and a reticulated porous base layer cladded by the outer contour layer; the outer contour layer comprises a mounting surface layer, a tooth surface layer, and a connecting surface layer connected between the mounting surface layer and the tooth surface layer and forming a complete gear outer contour together with the mounting surface layer and the tooth surface layer; the mounting surface layer, the tooth surface layer and the connecting surface layer are compact structures; the reticular porous base layer is located in a cavity formed by the outer contour layer, and fiber trabeculae in a porous grid structure are provided in the reticular porous base layer.

The present disclosure provides a reducer gear for robot, and a method for generating the gear and a reducer therewith. The reducer gear comprises: an outer contour layer and a reticulated porous base layer cladded by the outer contour layer; the outer contour layer comprises a mounting surface layer, a tooth surface layer, and a connecting surface layer connected between the mounting surface layer and the tooth surface layer and forming a complete gear outer contour together with the mounting surface layer and the tooth surface layer; the mounting surface layer, the tooth surface layer and the connecting surface layer are compact structures; the reticular porous base layer is located in a cavity formed by the outer contour layer, and fiber trabeculae in a porous grid structure are provided in the reticular porous base layer.

A gear includes an inner hub formed of metal material, the inner hub having an outer surface defining a plurality of outer teeth. The gear also includes an outer ring formed of non-metal material, the outer ring having an inner diameter that is smooth. The outer ring is disposed in an interference fit with the outer teeth of the inner hub.

A gear assembly includes a first gear and a second gear. The first gear rotates about a first axis, and includes a first plurality of teeth and a first surface extending circumferentially and carried by the first plurality of teeth. The first surface is electrically conductive. The second gear rotates about a second axis and is operably connected to the first gear. The second gear includes an electrically conductive element, a second plurality of teeth, and a second surface extending circumferentially and carried by the second plurality of teeth. The second surface is electrically nonconductive. The electrically conductive element includes a plurality of feelers with each feeler projecting radially outward and into a respective tooth of the second plurality of teeth.

A gear includes a steel rim having an inner circumferential surface a composite gear body attached thereto. The composite gear body includes an opening in a central region thereof. A first continuous fiber composite layer extends from a first point on an outer circumferential edge of the composite gear body to a second point on the outer circumferential edge. A second continuous fiber layer extends from the first point to the second point. The composite gear body also includes a filler layer disposed between the first and second continuous fiber layers, the filler layer extending within an inner region of the composite gear body. The inner region extends radially between the opening and a boundary inward of the inner circumferential surface such that the composite gear body is thicker within the inner region.

A gear includes a steel rim having an inner circumferential surface a composite gear body attached thereto. The composite gear body includes an opening in a central region thereof. A first continuous fiber composite layer extends from a first point on an outer circumferential edge of the composite gear body to a second point on the outer circumferential edge. A second continuous fiber layer extends from the first point to the second point. The composite gear body also includes a filler layer disposed between the first and second continuous fiber layers, the filler layer extending within an inner region of the composite gear body. The inner region extends radially between the opening and a boundary inward of the inner circumferential surface such that the composite gear body is thicker within the inner region.

A gear motor of an electrical assistance device for a cycle is provided, including a gear reducer and an electric motor, which are configured to be fitted coaxially on a central shaft, the gear reducer including at least one planet wheel, which is fitted firstly on an eccentric cam, the planet wheel also having passing therethrough at least three shafts of the satellite-carrier, the at least three shafts including a respective peripheral surface configured to come into contact with a hole of the planet wheel, which surface is made of polymer material, and/or the at least one planet wheel is made of polymer material.

A window covering includes a housing, a covering material, a spindle, and a driving device. The spindle and the driving device are provided at the housing. The driving device includes a motor having a shaft, and an epicyclic gearing decelerating device having an input end and an output end connected to the shaft and the spindle, respectively. Whereby, the spindle can drive the covering material to expand or to collapse. The epicyclic gearing decelerating device includes a ring portion and at least a planet gear assembly which is coupled between the input end and the output end. The planet gear assembly includes a plurality of planet gears having a Shore A durometer hardness of 45-90, which is rotatable along the fixedly provided ring portion. While being driven to move, a lower end of the covering material moves at a speed higher than 65 mm per second.

A window covering includes a housing, a covering material, a spindle, and a driving device. The spindle and the driving device are provided at the housing. The driving device includes a motor having a shaft, and an epicyclic gearing decelerating device having an input end and an output end connected to the shaft and the spindle, respectively. Whereby, the spindle can drive the covering material to expand or to collapse. The epicyclic gearing decelerating device includes a ring portion and at least a planet gear assembly which is coupled between the input end and the output end. The planet gear assembly includes a plurality of planet gears having a Shore A durometer hardness of 45-90, which is rotatable along the fixedly provided ring portion. While being driven to move, a lower end of the covering material moves at a speed higher than 65 mm per second.