A braking system is proposed for a vehicle, in particular a lightweight vehicle, in particular a pedal cycle, comprising a brake device, a mechanical urging device, and a hydraulic urging device, wherein the mechanical urging device and the brake device form a parking brake device, and the hydraulic urging device takes the form of a hydraulically actuable release device for the parking brake device.

A wheel having a longitudinal plane normal to an axis of rotation. The wheel has a rim with side surfaces on opposite sides of the longitudinal plane. A hub is concentrically disposed relative to the rim. Two unitary side elements are disposed on opposite sides of the longitudinal plane and are coupled to the rim and to end portions of the hub. Each of the unitary side elements has an annular sidewall, a flange portion, and a plurality of spokes that do not cross the longitudinal plane and that integrally interconnect the annular sidewall and the flange portion. An end portion of each spoke of the one side element is tied to the end portion of an aligned spoke of the other side element adjacent to the sidewall to restrict the tied end portions from moving away from each other.

A bicycle hub comprises a tubular body and a spoke attachment part. The tubular body has a rotational axis. The spoke attachment part includes an attachment opening through which a spoke is to extend. The attachment opening includes a first end opening through which the spoke is to extend, and a second end opening through which the spoke is to extend. The second end opening is provided outward of the first end opening in a radial direction perpendicular to the rotational axis. The second end opening has a first maximum length and a second maximum length. The first maximum length is defined in a circumferential direction defined about the rotational axis. The second maximum length is defined in an axial direction parallel to the rotational axis. The first maximum length is larger than the second maximum length.

A fluid machine for a pneumatic or hydraulic drive system, said fluid machine being able to work as a fluid motor or as a fluid pump, comprising: at least two piston assemblies each comprising a piston means (110a-c), the at least two piston assemblies being operable to cause sequential reciprocating movement of the pistons means (110a-c); a drive member (120) rotatable about an axis and providing an annular, wave-like surface (122) extending at least partially radially to the axis, towards which the piston means (110a-c) project, wherein, in case of working as a fluid motor, the pistons means (110a-c) are arranged to drive rotation of the drive member (120) about the axis at least by a pushing action on said wave-like surface (122) or, in the case of working as a fluid pump, the piston means (110a-c) are arranged to cooperate with said wave-like surface (122) so that rotation of the drive member (120) drives sequential reciprocating motion of the piston means (110a-c).

A motorcycle (300) includes a clutch lever (14), a clutch switch (15) configured to detect whether or not the clutch lever (14) is gripped, a vehicle speed sensor (16) configured to detect a vehicle speed, a hydraulic rear brake (18), a pressurizing unit (17) configured to perform a pressurizing process that applies an oil pressure to the rear brake (18), and a microcontroller (19) configured to control the pressurizing process by the pressurizing unit (17) based on results of the detection by the vehicle speed sensor (16) and the clutch switch (15).

A bicycle drive unit includes a planetary gear mechanism, a first motor and a second motor. The planetary gear mechanism includes a sun gear, a ring gear, a plurality of planetary gears and a carrier. The ring gear is disposed around the sun gear on the same axis as the sun gear. The planetary gears are disposed between the sun gear and the ring gear. The carrier rotatably holds the planetary gears and receives an input rotation of a crankshaft. The first motor is configured to transmit torque to the carrier. The second motor is configured to transmit torque to the sun gear and control the rotation of the sun gear.

A damper assembly for a bicycle wheel assembly may include a first damper configured to be disposed about a hub assembly of the bicycle wheel assembly. The first damper is configured to apply a first damping force against a spoke segment of at least one spoke of a plurality of spokes of the bicycle wheel assembly. The spoke segment is spaced apart from a spoke attachment member.

A wheel rotated by a load applied to an axle remaining stationary at an eccentric position is disclosed. The present invention comprises: the wheel configured such that the outer periphery of an inner rim of the wheel assembled to a wheel hub provided at the axle to which the load is applied applies pressure to a plurality of compressive force elastic bodies provided at the inner periphery of an outer rim of the wheel; and a control roller for pushing the outer rim of the wheel at a gap of a predetermined range such that the axle provided at the wheel hub always remains stationary at the eccentric position of the wheel.

A drive system and remote control for a light electric vehicle. The drive system includes a power unit, a main gearing connected to the power unit and a remote control connect to the power unit. The power unit includes an assist motor arranged to provide torque output to a torsion shaft of the light electric vehicle, and a control motor arranged to adjust transmission ration of the main gearing. The remote control further includes an operating switch arranged to switch the remote control between a first and a second operating state for controlling the assist motor and control motor, respectively.

A bicycle wheel contains a rim, multiple spokes, and multiple abutting faces. The rim includes multiple through orifices, a hub, and multiple threaded orifices. Two intersected spokes are connected with two adjacent through orifices and two threaded orifices corresponding to the two adjacent through orifices respectively. Each spokes includes a first screwing section and a second screwing section. The second screwing section is screwed with each of multiple nuts and each of multiple second screw bushings. The multiple abutting faces are connected with the multiple spokes respectively. Each spoke includes an axial line defined along a center thereof. An angle is defined between each abutting face of the rim and the axial line of each spoke and is 90 degrees. Two connection sections are formed on two ends of each abutting face.