Reel devices, systems, and related methods are disclosed. The reel devices are modular and include an automatic shift assembly that shifts to provide a mechanical advantage when used to tighten a cord. For instance, the reel devices are configured to provide a first drive ratio and automatically transition to a second drive ratio in response to a torque force. The reel devices include a drive assembly and a shift assembly. The drive assembly includes a cycloidal gear.

Reel devices, systems, and related methods are disclosed. The reel devices are modular and include an automatic shift assembly that shifts to provide a mechanical advantage when used to tighten a cord. For instance, the reel devices are configured to provide a first drive ratio and automatically transition to a second drive ratio in response to a torque force. The reel devices include a drive assembly and a shift assembly. The drive assembly includes a cycloidal gear.

A transmission assembly for operably coupling an input member to an output member includes a first cycloidal gear stage having a first gear ratio and a second cycloidal gear stage having a second gear ratio different than the first gear ratio. The transmission assembly also includes a shifting mechanism for selectively driving the output member with one of the first cycloidal gear stage and the second cycloidal gear stage.

A transmission assembly for operably coupling an input member to an output member includes a first cycloidal gear stage having a first gear ratio and a second cycloidal gear stage having a second gear ratio different than the first gear ratio. The transmission assembly also includes a shifting mechanism for selectively driving the output member with one of the first cycloidal gear stage and the second cycloidal gear stage.

A double-drive transmission washing machine and method comprising: fixedly connecting an input part of a speed reduction mechanism to a power part for providing rotational driving power; fixedly connecting a spinning output part of the speed reduction mechanism to a spin tube of the washing machine; connecting a agitating output part of the speed reduction mechanism to a wash shaft of the washing machine; by means of connecting the agitating output part to the input part, the agitating output part revolves around an axis of the power part; and by means of meshing connection between the spinning output part and the agitating output part, the spinning output part and the agitating output part are interacting with each other, but rotate separately drive the wash shaft and the spin tube to rotate individually. This washing machine has the rotation speed of the wash shaft vary according to the washing load.

A double-drive transmission washing machine and method comprising: fixedly connecting an input part of a speed reduction mechanism to a power part for providing rotational driving power; fixedly connecting a spinning output part of the speed reduction mechanism to a spin tube of the washing machine; connecting a agitating output part of the speed reduction mechanism to a wash shaft of the washing machine; by means of connecting the agitating output part to the input part, the agitating output part revolves around an axis of the power part; and by means of meshing connection between the spinning output part and the agitating output part, the spinning output part and the agitating output part are interacting with each other, but rotate separately drive the wash shaft and the spin tube to rotate individually. This washing machine has the rotation speed of the wash shaft vary according to the washing load.

A bidirectionally rotatable mechanism, a bidirectional sander, and a bidirectional cleaner; the mechanism including an actuator, an inner and an outer shaft, the inner and outer shafts being actuated to rotate by the actuator, the outer shaft being sleeved outside the inner shaft; a speed reducer is arranged between an output shaft of the actuator and the inner shaft; two ends of the speed reducer are in transmission connection with the output shaft and the inner shaft, respectively; a first gear is arranged on an outer peripheral surface of the inner shaft; an outer transmission assembly in transmission connection with the outer shaft is arranged outside the inner shaft, the outer transmission assembly including a support element, an upper planetary carrier, a planetary gear meshing with the first gear, and a lower planetary carrier connected to the outer shaft, the planetary gear between the upper and the lower planetary carrier.

A bidirectionally rotatable mechanism, a bidirectional sander, and a bidirectional cleaner; the mechanism including an actuator, an inner and an outer shaft, the inner and outer shafts being actuated to rotate by the actuator, the outer shaft being sleeved outside the inner shaft; a speed reducer is arranged between an output shaft of the actuator and the inner shaft; two ends of the speed reducer are in transmission connection with the output shaft and the inner shaft, respectively; a first gear is arranged on an outer peripheral surface of the inner shaft; an outer transmission assembly in transmission connection with the outer shaft is arranged outside the inner shaft, the outer transmission assembly including a support element, an upper planetary carrier, a planetary gear meshing with the first gear, and a lower planetary carrier connected to the outer shaft, the planetary gear between the upper and the lower planetary carrier.

A bidirectionally rotatable mechanism, a bidirectional sander, and a bidirectional cleaner; the mechanism including an actuator, an inner and an outer shaft, the inner and outer shafts being actuated to rotate by the actuator, the outer shaft being sleeved outside the inner shaft; a speed reducer is arranged between an output shaft of the actuator and the inner shaft; two ends of the speed reducer are in transmission connection with the output shaft and the inner shaft, respectively; a first gear is arranged on an outer peripheral surface of the inner shaft; an outer transmission assembly in transmission connection with the outer shaft is arranged outside the inner shaft, the outer transmission assembly including a support element, an upper planetary carrier, a planetary gear meshing with the first gear, and a lower planetary carrier connected to the outer shaft, the planetary gear between the upper and the lower planetary carrier.

A bidirectionally rotatable mechanism, a bidirectional sander, and a bidirectional cleaner; the mechanism including an actuator, an inner and an outer shaft, the inner and outer shafts being actuated to rotate by the actuator, the outer shaft being sleeved outside the inner shaft; a speed reducer is arranged between an output shaft of the actuator and the inner shaft; two ends of the speed reducer are in transmission connection with the output shaft and the inner shaft, respectively; a first gear is arranged on an outer peripheral surface of the inner shaft; an outer transmission assembly in transmission connection with the outer shaft is arranged outside the inner shaft, the outer transmission assembly including a support element, an upper planetary carrier, a planetary gear meshing with the first gear, and a lower planetary carrier connected to the outer shaft, the planetary gear between the upper and the lower planetary carrier.