A bike pedal assembly uses a pawl, a gear and a torque spring to enable a rider to store and release torque energy while pedaling a bike. The pawl and gear are connected to a nut on an axle, which is connected to a crank arm of the bike. Being connected to the gear and a foot pedal, the torque spring stores torsional energy when one end is stationary and the other rotates with the foot pedal during half of the crank arm resolution, while releases torsional energy during the second half to the crank arm. Thus, the pedal assembly, which can be efficiently installed on each of the foot pedals of the bike, allows the rider to store and utilize additional torque energy and provides a more efficient means of storing torque energy than the conventional system.

A stabilization apparatus for a two-wheeled vehicle includes a rotationally mounted gyroscope and a drive unit, as well as a rotational-direction reversal unit disposed between the drive unit and the gyroscope.

A rotation transmission mechanism of the invention includes an inner rotating member and an outer rotating member that is rotatably disposed with respect to the inner rotating member. The inner rotating member includes an outer peripheral protruding portion that protrudes toward an outer peripheral side. The outer rotating member includes an annular portion and an inner peripheral protruding portion. The outer peripheral protruding portion has a forward movement surface at a position shifted from a center of the outer peripheral protruding portion in a forward rotational direction in which the rotation transmission mechanism is rotated by forward movement. An elastically deformable portion is disposed between the forward movement surface and the inner peripheral protruding portion. The outer peripheral protruding portion and the annular portion are provided with guide portions that guide the outer peripheral protruding portion so as to slidably move in a rotational direction of the rotation transmission mechanism with respect to the annular portion.

A rotation transmission mechanism of the invention includes an inner rotating member and an outer rotating member that is rotatably disposed with respect to the inner rotating member. The inner rotating member includes an outer peripheral protruding portion that protrudes toward an outer peripheral side. The outer rotating member includes an annular portion and an inner peripheral protruding portion. The outer peripheral protruding portion has a forward movement surface at a position shifted from a center of the outer peripheral protruding portion in a forward rotational direction in which the rotation transmission mechanism is rotated by forward movement. An elastically deformable portion is disposed between the forward movement surface and the inner peripheral protruding portion. The outer peripheral protruding portion and the annular portion are provided with guide portions that guide the outer peripheral protruding portion so as to slidably move in a rotational direction of the rotation transmission mechanism with respect to the annular portion.

Disclosed is a rotation transmission mechanism including: an internal rotation member inserted by a crankshaft of a bicycle; and an external rotation member configured on the internal rotation member. The internal rotation member includes: an internal rotation member body. The external rotation member includes: a circular ring part configured at an outer side of the outer circumferential convex parts; and inner circumferential convex parts protruding to an inner circumferential side of the circular ring part and configured alternately with the outer circumferential convex parts. Elastic deformation parts are configured between the outer circumferential convex parts and the inner circumferential convex parts on a rotation direction side of the advancing outer circumferential convex parts. The outer circumferential convex parts are formed in such a manner that a surface on the rotation direction side is greater than a surface on an opposite side of the rotation direction.

Disclosed is a rotation transmission mechanism including: an internal rotation member inserted by a crankshaft of a bicycle; and an external rotation member configured on the internal rotation member. The internal rotation member includes: an internal rotation member body. The external rotation member includes: a circular ring part configured at an outer side of the outer circumferential convex parts; and inner circumferential convex parts protruding to an inner circumferential side of the circular ring part and configured alternately with the outer circumferential convex parts. Elastic deformation parts are configured between the outer circumferential convex parts and the inner circumferential convex parts on a rotation direction side of the advancing outer circumferential convex parts. The outer circumferential convex parts are formed in such a manner that a surface on the rotation direction side is greater than a surface on an opposite side of the rotation direction.

A cycle crank assembly includes a crank spindle and a drivetrain connector configured to translate rotation of the crank spindle into rotation of a wheel. A crank arm includes a pedal interface configured to receive a pedal spindle of a cycle pedal. A slip connection is configured to allow the crank arm to rotate about the crank spindle. A resiliently deformable member is connected to the crank spindle and the crank arm proximate to the pedal interface. The resiliently deformable member translates rotation of the crank arm into rotation of the crank spindle. The resiliently deformable member deforms under load to store pedal energy provided by a rider to the cycle pedal and returns at least a portion of the pedal energy when not under load in a direction of the rotation.

A continuous derailleur of a bicycle contains: a drive shaft, a rotary shaft, a brake shaft, and a braking device. The rotary shaft is mounted on the drive shaft. The drive shaft includes a bevel gear member having a first bevel gear and a second bevel gear. The drive shaft includes a first pedal shaft, and the brake shaft includes a first interactive bevel gear and includes the braking device. The rotary shaft includes a second interactive bevel gear and a third interactive bevel gear, and the second interactive bevel gear and the third interactive bevel gear mesh with the second bevel gear of the bevel gear member. The continuous derailleur further contains an output bevel gear, and the output bevel gear is rotatably fitted on the drive shaft, hence the second interactive bevel gear and the third interactive bevel gear mesh with the output bevel gear.

A wheel for a vehicle is provided. The wheel has a first rim support member having a first hub portion rotatably mounted on an axle, and a second rim support member having a second hub portion releasably rotatably mounted on the axle, the second rim support member being releasably secured to the first rim support member along a region spaced from the axle. A rim portion extends from at least one of the first rim support member and the second rim support member and is configured to support a tyre thereon. A flywheel is positioned between the first rim support member and the second rim support member and has a flywheel hub portion releasably rotatably mounted on the axle between the first hub portion and the second hub portion.

A wheel for a vehicle is provided. The wheel has a first rim support member having a first hub portion rotatably mounted on an axle, and a second rim support member having a second hub portion releasably rotatably mounted on the axle, the second rim support member being releasably secured to the first rim support member along a region spaced from the axle. A rim portion extends from at least one of the first rim support member and the second rim support member and is configured to support a tyre thereon. A flywheel is positioned between the first rim support member and the second rim support member and has a flywheel hub portion releasably rotatably mounted on the axle between the first hub portion and the second hub portion.