A bearing seat suitable for receiving a bearing includes an annular body, a first outer-radial flange and a second outer-radial flange. The annular body includes a peripheral wall. The peripheral wall has a first end, a second end, an inner matching surface and an outer surface. A thickness difference between the maximum thickness and the minimum thickness of the peripheral wall is within 30%. A portion of the inner matching surface is suitable for contacting and matching with an outer matching surface of the bearing. The first outer-radial flange protrudes from the outer surface adjacent to the first end and extends to the first end. The second outer-radial flange protrudes from the outer surface adjacent to the second end and extends to the second end. The overall structure of the bearing seat is uniform, which can reduce warpage and deformation caused by uneven shrinkage during the injection process.

A bearing seat suitable for receiving a bearing includes an annular body, a first outer-radial flange and a second outer-radial flange. The annular body includes a peripheral wall. The peripheral wall has a first end, a second end, an inner matching surface and an outer surface. A thickness difference between the maximum thickness and the minimum thickness of the peripheral wall is within 30%. A portion of the inner matching surface is suitable for contacting and matching with an outer matching surface of the bearing. The first outer-radial flange protrudes from the outer surface adjacent to the first end and extends to the first end. The second outer-radial flange protrudes from the outer surface adjacent to the second end and extends to the second end. The overall structure of the bearing seat is uniform, which can reduce warpage and deformation caused by uneven shrinkage during the injection process.

A centring ring (5) and a method for reducing the risk of breakage of at least one thin-walled area of a centring ring (4) are proposed, the centring ring (5) having at least two thick-walled segments, i.e. at least one first thick-walled segment (15) and one second thick-walled segment (16), said first thick-walled segment (15) having a side surface (23) which faces a side surface (31) of the second thick-walled segment (16), said side surfaces (23, 31) touching each other at least partially or being separated from each other by a gap (37) having a given clearance B (38), and said centring ring (5) including at least one movement limiter (24, 48) which allows the side surfaces (23,31) to merely drift apart under the application of force and/or drift towards each other under the application of force until a certain clearance B (38) is reached.

A centring ring (5) and a method for reducing the risk of breakage of at least one thin-walled area of a centring ring (4) are proposed, the centring ring (5) having at least two thick-walled segments, i.e. at least one first thick-walled segment (15) and one second thick-walled segment (16), said first thick-walled segment (15) having a side surface (23) which faces a side surface (31) of the second thick-walled segment (16), said side surfaces (23, 31) touching each other at least partially or being separated from each other by a gap (37) having a given clearance B (38), and said centring ring (5) including at least one movement limiter (24, 48) which allows the side surfaces (23,31) to merely drift apart under the application of force and/or drift towards each other under the application of force until a certain clearance B (38) is reached.

The present invention provides a handlebar locking device which (i) can be used for a moving body whose traveling direction is changed with a handlebar and (ii) makes it difficult to unlock the handlebar by a forcible method such as breaking. The handlebar locking device (20) includes (i) a lock unit (30) which is fixed in a steering column (11) that rotates along with a handlebar (5) and (ii) a fixed bracket (70) which is fixed in a head tube (12). The lock unit (30) includes (i) a lock pin (31) having a tip part (31a) that protrudes from a guiding long hole (11a) of the steering column (11) and (ii) a lock pin drive mechanism which controls the lock pin (31) to axially move back and forth. The fixed bracket (70) has an engagement groove (71) with which the lock pin (31) is to be engaged.

A rack-driven seated handcycle is a semi-recumbent style two, three, or four wheeled human powered cycle that uses a linearly designed toothed rack with teeth located on the topside and bottom side of the rack, and a gear that meshes with the top teeth and a gear that meshes with the bottom teeth, at least one ratchet mechanism, and a chain coupling the upper and lower gears with the drive wheel which may be located in front or back of the rider. The rider pushes and pulls the handlebars forward and rearward to pull the rack back and forth in relation to the pinions above and below the toothed rack to drive chain(s) to propel the cycle forward. Each forward and each rearward stroke may constitute a power stroke to propel the cycle. A plurality of gear speeds is able to in select a lever ratio for each of the forward and the rearward strokes.

A rack-driven seated handcycle is a semi-recumbent style two, three, or four wheeled human powered cycle that uses a linearly designed toothed rack with teeth located on the topside and bottom side of the rack, and a gear that meshes with the top teeth and a gear that meshes with the bottom teeth, at least one ratchet mechanism, and a chain coupling the upper and lower gears with the drive wheel which may be located in front or back of the rider. The rider pushes and pulls the handlebars forward and rearward to pull the rack back and forth in relation to the pinions above and below the toothed rack to drive chain(s) to propel the cycle forward. Each forward and each rearward stroke may constitute a power stroke to propel the cycle. A plurality of gear speeds is able to in select a lever ratio for each of the forward and the rearward strokes.

A vehicle includes a vehicle body and a front wheel that is disposed anterior to the vehicle body and that is steerable about a steering axis. The vehicle body includes a vehicle body frame and a steering rotation unit that is supported on the vehicle body frame and that rotates about the steering axis. The vehicle includes a variable trail length mechanism. The variable trail length mechanism includes an oscillation unit that supports front forks that are disposed to be oscillatable in a fore-aft direction and that support the front wheel, and an electric motor that oscillates the oscillation unit. The electric motor is supported by the vehicle body.

A vehicle includes a vehicle body and a front wheel that is disposed anterior to the vehicle body and that is steerable about a steering axis. The vehicle body includes a vehicle body frame and a steering rotation unit that is supported on the vehicle body frame and that rotates about the steering axis. The vehicle includes a variable trail length mechanism. The variable trail length mechanism includes an oscillation unit that supports front forks that are disposed to be oscillatable in a fore-aft direction and that support the front wheel, and an electric motor that oscillates the oscillation unit. The electric motor is supported by the vehicle body.

A leaning vehicle includes a body frame including a headpipe, a front wheel, a steering torque transmission including a steering shaft supported by bearings, a handlebar assembly, and a front wheel connector that transmits a steering torque, and a steering torque detector. The steering torque transmission includes a torsional deformation element upstream of a portion of the steering shaft supported by the most upstream bearing in a steering torque transmission path, and which is easily twisted and deformed by a steering torque input from grips on the handlebar assembly. The steering torque detector detects at least a portion of the steering torque input into the steering torque transmission based on a torsional deformation of the torsional deformation element.