A limiting structure of a bicycle includes a handlebar, a rotating member, a front fork, and a frame. The frame is provided with a mounting portion. The handlebar is partially accommodated at one end of the mounting portion, and the front fork is partially accommodated at the other end of the mounting portion. The rotating member is accommodated in the mounting portion. Two ends of the rotating member are movably connected to the front fork and the handlebar, respectively. An annular movable groove is formed between an inner wall of the mounting portion and the rotating member. The front fork is provided with a first limiting block, and the first limiting block is movably accommodated in the movable groove. The frame further includes a second limiting block, and the second limiting block is fixedly accommodated in the movable groove.

A limiting structure of a bicycle includes a handlebar, a rotating member, a front fork, and a frame. The frame is provided with a mounting portion. The handlebar is partially accommodated at one end of the mounting portion, and the front fork is partially accommodated at the other end of the mounting portion. The rotating member is accommodated in the mounting portion. Two ends of the rotating member are movably connected to the front fork and the handlebar, respectively. An annular movable groove is formed between an inner wall of the mounting portion and the rotating member. The front fork is provided with a first limiting block, and the first limiting block is movably accommodated in the movable groove. The frame further includes a second limiting block, and the second limiting block is fixedly accommodated in the movable groove.

A tiltable vehicle has a pair of front wheels coupled to a tiltable chassis by a tilt linkage, such that the pair of front wheels and the chassis are configured to tilt in unison with respect to a roll axis of the chassis. The tilt linkage includes a four-bar linkage having a pair of upper bar segments coupled to the chassis at spaced-apart respective inboard joints. In some examples, the inboard joints of the upper bar segments are each disposed outboard of a central chassis joint of a lower bar of the tilt linkage. An orientation sensor is configured to detect directional information regarding a net force vector applied to the chassis, and a tilt actuator operatively coupled to the chassis and configured to selectively tilt the chassis. A controller is configured to selectively control the tilt actuator based on the directional information from the orientation sensor.

A tiltable vehicle has a pair of front wheels coupled to a tiltable chassis by a tilt linkage, such that the pair of front wheels and the chassis are configured to tilt in unison with respect to a roll axis of the chassis. The tilt linkage includes a four-bar linkage having a pair of upper bar segments coupled to the chassis at spaced-apart respective inboard joints. In some examples, the inboard joints of the upper bar segments are each disposed outboard of a central chassis joint of a lower bar of the tilt linkage. An orientation sensor is configured to detect directional information regarding a net force vector applied to the chassis, and a tilt actuator operatively coupled to the chassis and configured to selectively tilt the chassis. A controller is configured to selectively control the tilt actuator based on the directional information from the orientation sensor.

A device for operating a motorcycle includes a steering device with a first and a second grip element, and includes a sensor system for detecting a riding situation. The sensor system includes a grip sensor which is arranged in or on one of the grip elements and which is designed to, in an operating state of the operating device, detect external contact on the respective grip element and generate an associated grip measurement signal. The operating device furthermore includes a steering actuator which is coupled to the steering device for the purposes of setting a steering angle with respect to a steering axis, such that, in a manner dependent on the riding situation and the grip measurement signal, a predetermined steering angle can be set at the steering device by way of the steering actuator.

Headsets and head tube assemblies for vehicles are provided. The vehicle includes a steerer tube and a head tube. The headset is rotatably connected to the steerer tube and the head tube. The headset includes a coupling ring that has a body and a central bore defined in and extending through the body. The coupling ring is connectable to and rotatable with the steerer tube. A cup that has a body and a central bore defined in and extending through the body. The cup is connectable to and rotatable with the head tube. A bearing assembly disposed between the cup and the coupling ring. The bearing assembly has an inner race, an outer race, and a bearing member disposed between the inner race and the outer race. A damping fluid surrounds the bearing member to dampen vibrations between the steerer tube and the head tube.

An apparatus provides a restoring moment for a two-wheeler steering mechanism. A mounting device mounts the apparatus on a two-wheeler frame. A coupling device couples the apparatus with a fork shaft, and has a rotational axis. An energy storing device stores a restoring force. A force transmitting device transmits steering force to the energy storing device. The force transmitting device has a force transmitting point that is eccentric to the rotational axis, and forms a force action line through the eccentric force transmitting point and an application point of the force transmitting device on the energy storing device for transmitting the steering force to the energy storing device. In a neutral position of the apparatus, the force action line and a straight line running through the rotational axis and the application point enclose an angle. A two-wheeler frame, a two-wheeler steering and a two-wheeled vehicle are also provided.

A bicycle headset includes a fixed member, wherein the headset is fixed onto a headtube of a bicycle via the fixed member. A steerer tube of a fork passes through the headtube and is connected to a fork portion. The fixed member has a first contour including a first guiding section, a second section, and a joint section that connects the first section and the second section and is located at the highest site among the first contour. A rotating member is fixed onto the steerer tube. A movable member is disposed onto the rotating member and is movable along an axial direction of the steerer tube. An elastic member urges the movable member to allow a second contour of the movable member to constantly touch the first contour of the fixed member, thereby preventing a stem connected to the steerer tube from overly turned and assisting to steer back.

A suspension unit has a piston assembly connected to an adjuster. The piston assembly has three or more concentric cylindrical bodies including: an outer tube; an inner tube, and a dampener rod. The dampener rod is inside and concentric to the inner tube. The outer tube is rigidly connected to the dampener rod. The inner tube is telescopically mounted to the outer tube. The inner tube is inside and concentric to the outer tube. The adjuster has an adjuster compression entry port. The axle clamp rebound port connects to an adjuster block rebound entry port. The adjuster block has a high-speed compression cavity formed on an end of the adjuster block.

A suspension unit has a piston assembly connected to an adjuster. The piston assembly has three or more concentric cylindrical bodies including: an outer tube; an inner tube, and a dampener rod. The dampener rod is inside and concentric to the inner tube. The outer tube is rigidly connected to the dampener rod. The inner tube is telescopically mounted to the outer tube. The inner tube is inside and concentric to the outer tube. The adjuster has an adjuster compression entry port. The axle clamp rebound port connects to an adjuster block rebound entry port. The adjuster block has a high-speed compression cavity formed on an end of the adjuster block.