Mitsubishi Heavy Industries Limited

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Mitsubishi Jukogyo Kabushiki Kaisha

Mitsubishi Jukogyo K.k.

Hisayoshi Takahashi

Shoichi Oda

Hiroshi Satoh

Hiroyuki Sonobe

Katsuhiko Suzuki

Masashi Hirabayashi

Katsutoshi Ohta

Itsuro Sakai

In a driving unit for an electric motor driven bicycle, a motor (31) has an output shaft coaxial with a crank shaft (39) of a pedal. A planet roller reducer (40) has a sun roller shaft coincident with the output shaft. Through the planet roller reducer (40) and a two-stage reducing gear mechanism (50) for further reducing the output of the planet roller reducer (40), a torque of the motor (31) is transmitted to a driving chain sprocket (4). Provided that the torque of the motor (31) exceeds a predetermined pedaling torque level, the torque is transmitted to the driving chain sprocket (4).

Driving unit for an electric motor driven bicycle

In a planetary-roller transmission for transmitting power from one rotating shaft to another by a plurality of planet rollers pivotally supported, in contact with the outer periphery of a sun roller connected to the first rotating shaft and also with the inner periphery of an internal contact ring secured to a stationary member, by a carrier connected to the second shaft, all or any of the rollers and ring is an elastic one, which consists of a plurality of thick-walled cylindrical parts spaced apart axially of the associated shaft, a cylindrical part thinner than the thick-walled parts, with its inner or outer periphery serving as a surface to contact the mating roller or ring, and disk-shaped parts thinner than the thick-walled parts and connecting the both sides of the thin-walled cylindrical part separately to the thick-walled parts, so that, when the thick-walled cylindrical parts are pressed toward each other at the both outermost sides, the diameter of the thin-walled cylindrical part is changed, and then the elastic roller or ring is compressed axially of the associated shaft to change its total width so as to change the contact pressure to be exerted between all the rollers and ring. Where the internal contact ring is made elastic, a torque cam mechanism for producing a compressive force proportional to the load on the rotating shafts, axially of the shafts, and imparting the same to the internal contact ring is disposed between the ring and the stationary member.

Planetary-roller transmission with elastic roller or ring

A planetary-roller transmission for transmitting power from one rotating shaft to another by means of a plurality of planet rollers pivotally supported, in contact with the outer periphery of a sun roller fixedly mounted on one rotating shaft and also with the inner periphery of an internal contact ring secured to a stationary member and made unmovable circumferentially of the rotating shaft, by a carrier connected to the other rotating shaft, characterized in that either the internal contact ring or the sun roller or both are in the form of an elastic element or elements adapted to receive, on one side thereof, a compressive force axially of the rotating shafts to change the radius of the element surface in pressure contact with the mating rollers, and a presser device is provided which applies the compressive force to one side of each elastic element and brings the element into or out of engagement with the mating rollers by increasing or decreasing the compressive force.

Planetary-roller transmission with deformable clutching element

Growing community of inventors

Nagoya, Japan

Hisayoshi Takahashi