Provided is a cap unit that can prevent or suppress collision between the drive gear and intermittent gear when the drive gear and intermittent gear begin to mesh. A cap unit 25 has a moving mechanism 28 that moves a cap 26. The moving mechanism 28 has an intermittent cam gear 36 with a cam channel 43; a drive gear 35; and a cap holder 45. The cap holder 45 includes a holding member 48 that holds the cap 26; a cam follower pin 49; a pin support mechanism 50 that supports the cam follower pin 49; and a coil spring 51 that urges the cam follower pin 49 toward the bottom 43a of the cam channel 43. A slope 57 is disposed to the bottom 43a of the cam channel 43. The cam follower pin 49 is on the slope 57 when meshing of the intermittent cam gear 36 and drive gear 35 is disengaged, and the intermittent cam gear 36 turns in conjunction with the cam follower pin 49 moving on the slope 57 due to the urging force of the coil spring 51.

A transmission comprising: a casing having: a first shaft having a truncated cone portion, a second shaft parallel to and spaced away from the truncated cone portion, a first gear mounted on the second shaft, the first gear being configured for rotation with the second shaft, the first gear being in connection with the first shaft, a linear actuator connected to the first gear, the linear actuator allowing to position the first gear at any one of a plurality of positions along the second shaft, the truncated cone portion having, at its beginning and its end, a respective one of a set of gears with a respective diameter and a respective number of teeth being proportionate to a diameter of the truncated cone portion, at least two counter-wound spiral gear tracks extending between the respective one of the set of gear s and another one of the set of gears.

Methods and systems for a gearbox are provided. A multi-speed gearbox system in an electric vehicle includes, in one example, a planetary assembly designed to rotationally coupled to an electric machine and including a first planetary gear set that is rotationally coupled to a second planetary gear set that includes a first set of pinion gears and a second set of pinion gears. The multi-speed gearbox system further includes a first clutch designed to selectively ground a first component in one of the first planetary gear set and the second planetary gear set.

This invention relates to a drive system which automatically disengages when a loading above a certain threshold limit is applied to the driven component, thus preventing damage to the drive system and foremost to the gearing between the drive system and the driven component when such a load is applied.

A bicycle drive system includes a front face gear, a rear face gear, a drive shaft, and a front roller-toothed gear assembly coupled to the first end of the drive shaft, and a rear roller-toothed gear assembly coupled to the second end of the drive shaft. Both the front roller-toothed gear assembly and the rear roller-toothed gear assembly include one or more roller elements. The roller-toothed gear assemblies are advantageous in ensuring the bicycle drive system is highly efficient, and is only minimally or not at all affected by dirt, water, contaminants, or other foreign matter typically experienced in un-clean riding conditions.

A transmission comprising: a casing having: a first shaft having a truncated cone portion, a second shaft parallel to and spaced away from the truncated cone portion, a first gear mounted on the second shaft, the first gear being configured for rotation with the second shaft, the first gear being in connection with the first shaft, a linear actuator connected to the first gear, the linear actuator allowing to position the first gear at any one of a plurality of positions along the second shaft, the truncated cone portion having, at its beginning and its end, a respective one of a set of gears with a respective diameter and a respective number of teeth being proportionate to a diameter of the truncated cone portion, at least two counter-wound spiral gear tracks extending between the respective one of the set of gear s and another one of the set of gears.

A powertrain includes an electric motor and a first planetary gear stage having a first rotatable member drivingly connected to the electric motor and at least one second rotatable member. A second planetary gear stage includes a third rotatable member drivingly connected to the at least one second rotatable member and includes at least one fourth rotatable member. One of the third rotatable member and the at least one fourth rotatable member is connected to an output member. A passive one-way clutch and a selectable one-way clutch are associated with at least one of the first and second planetary gear stages for varying operation of the first and second planetary gear stages based upon an operation state of the selectable one-way clutch and a direction of rotation of the electric motor.

A planetary gear train may include input and output shafts a compound planetary gear set having first, second, third and fourth rotation elements by combination of first and second planetary gear sets; a third planetary gear set having fifth, sixth, and seventh rotation elements; a fourth planetary gear set having eighth, ninth, and tenth rotation elements, the first rotation element selectively connectable to the fifth rotation element and the tenth rotation element, respectively, the second rotation element and the tenth rotation element selectively connectable to the transmission housing, the third rotation element fixedly connected to the sixth rotation element, and fixedly connected to the input shaft, the fourth rotation element selectively connectable to the seventh shaft, the fifth rotation element fixedly connected to the eighth shaft, the seventh rotation element selectively connectable to the ninth shaft, the ninth rotation element fixedly connected to the output shaft.

A bicycle drive system includes a front face gear, a rear face gear, a drive shaft, and a front roller-toothed gear assembly coupled to the first end of the drive shaft, and a rear roller-toothed gear assembly coupled to the second end of the drive shaft. Both the front roller-toothed gear assembly and the rear roller-toothed gear assembly include one or more roller elements. The roller-toothed gear assemblies are advantageous in ensuring the bicycle drive system is highly efficient, and is only minimally or not at all affected by dirt, water, contaminants, or other foreign matter typically experienced in un-clean riding conditions.

A drive unit includes a wheel distribution gear mechanism for driving two output wheels as a function of the direction of rotation. An intermediate wheel, which meshes with a drive wheel of the wheel distribution gear mechanism, is movably guided on a circular path that is concentric with respect to an axis of rotation of the drive wheel, so as to reach a first driving position, meshing with a first output wheel, during rotation in a first direction of rotation, and a second driving position, meshing with a second output wheel, during rotation in an opposite second direction of rotation.