This clamping device includes a clamping collar intended to surround an element to be clamped and open so as to have two ends able to come closer to one another in order to grip the element to be clamped. This device also includes a lever, mounted tilting on the ends of the collar around a tilting axis perpendicular to a central axis of the collar, and connected to the collar by a cam system able to be actuated by tilting the lever. The cam system includes at least one pair associating a cam surface and a counter-cam surface, which are each globally helical and which are respectively connected in rotation to the collar and the lever. The cam surface of each pair includes a first surface portion, against which the counter-cam surface is pressed when the lever is in an open position and is tilted from the open position to a closed position, and a second surface portion, which is connected to the first portion and against which the counter-cam surface is pressed when the lever is in the closed position and tilted from the closed position toward the open position. The counter-cam surface includes a main part, which is helical, while being centered on the tilting axis and having a constant pitch, and which is pressed along the tilting axis against the second surface portion of the associated cam surface when the lever is in the closed position. Furthermore, the cam surface defines a bearing helix at which the bearing stresses are applied between the cam and counter-cam surfaces, this bearing helix winding around the tilting axis and extending at least partially over the first and second portions. In order to improve this clamping device, in particular for its use on rental cycles, the bearing helix of the cam surface has a helix angle that is larger on the first portion than on the second portion of the cam surface, while this second portion of the cam surface has a pitch that is substantially equal to the constant pitch of the main part of the associated counter-cam surface.

The utility model discloses an anti-disengagement fine-adjustable quick-detachable structure, which comprises a shaft lever, a spanner rod and a fine-adjustable unit; wherein the shaft lever has a small-diameter portion and a large-diameter portion, an anti-disengagement end face is formed at a junction between the small-diameter portion and the large-diameter portion, and the spanner rod is screwed to one end of the shaft lever; and the fine-adjustable unit has an inner sleeve and an outer sleeve, the inner sleeve has an axially penetrating through hole and a fine-adjustable external thread, the outer sleeve is hollow annular, a small-diameter hole and a large-diameter hole communicated with the small-diameter hole are arranged on an inner circumferential surface of the outer sleeve, a fine-adjustable internal thread is arranged on a hole wall of the small-diameter hole, the fine-adjustable internal thread of the outer sleeve is screwed onto the fine-adjustable external thread of the inner sleeve such that the outer sleeve rotates under an external force to move in a reciprocating manner along an axial direction of the inner sleeve, the through hole of the inner sleeve allows the shaft lever to pass through, the inner diameter of the large-diameter hole is greater than the outer diameter of the large-diameter portion of the shaft lever, and the inner diameter of the small-diameter hole is smaller than the outer diameter of the large-diameter portion of the shaft lever, thereby achieving the effect of preventing component disengagement.

An adjustable axle retaining structure is disclosed. The structure includes an axle receiving feature on a first leg of a fork assembly and a retaining sleeve within a clamping member on a second leg of the fork assembly. An axle is inserted through the clamping member, the wheel hub and coupled with the axle receiving feature. A component of the axle is tightened thereby moving the retaining sleeve partially out of the clamping member and toward the wheel hub until the wheel hub is in contact with both the retaining sleeve and the axle receiving feature, wherein the moving of the retaining sleeve allows the axle to radially couple the wheel hub with the fork assembly without modifying a preestablished geometry of the fork assembly.

A hub for a human-powered vehicle is provided that comprises a hub axle, a hub body, an electric power generator, and a communication device. The hub body is rotatably mounted on the hub axle about a rotational axis. The electric power generator is provided between the hub axle and the hub body. The electric power generator is configured to generate electric power by relative rotation between hub axle and the hub body. The communication device is located at least partly outside of the hub body. The communication device includes a wireless communicator configured to wirelessly communicate with an additional wireless communicator.

An elongated, plate-like structure on which bicycle accessories can be mounted, that is held in place at one end of a bicycle's rear axle or, alternately, its axial skewer. The latter, like the rear axle, includes bolt threads for threadedly engaging a nut at said end. Supported on either the bike's right or left side, the structure, which extends both perpendicularly to and rearwardly from the rear wheel's rotational axis, defines multiple through openings. Among them is a round aperture sized to slideably receive the rear axle or, alternately, just a part of the skewer-engageable nut at the same time the nut's annular shoulder abuts the structure's outer face. Distal from the round aperture, the structure's generally flat inner face defines a small protuberance which, in use, restrains, from sideways slippage, a bicycle tow leash or like accessory clamped onto an opening-free portion of the structure's midsection.

A tensioning device for bicycle front and rear wheel assemblies. A skewer assembly with a thumbnut is securable to the wheel assembly with a quick-release assembly. Portions of the skewer assembly are removable from the quick-release assembly by turning the thumbnut a partial turn, such as a quarter of a turn. Removal of the skewer assembly allows the front wheel to be removed. In another embodiment, the skewer assembly is able to be removed by turning the quick-release assembly by a partial turn, such as a quarter of a turn.

A hub assembly is provided for a human-powered vehicle. The hub assembly includes a hub axle, a hub body, a pawl support body, at least one pawl, a sprocket support body, at least one sprocket support bearing, a ratchet body and a plurality of ratchet teeth. The hub body is rotatably mounted on the hub axle. The pawl support body is connected to the hub body. The pawl is movable between a driving position and a non-driving position. The at sprocket support bearing rotatably supports the sprocket support body on the hub axle. The ratchet body is connected to the sprocket support body. The ratchet teeth engage the pawl to transmit a driving force from the sprocket support body to the hub body while rotating in a driving rotational direction. The sprocket support bearing is disposed opposite to the hub body with respect to the ratchet teeth.

A bicycle wheel securing structure is basically provided with an axle member, a head member, a lever member and an adjusting member. The axle member is at least partially hollow, and includes a first end portion, a second end portion and a vehicle body engagement portion. The vehicle body engagement portion is provided to the second end portion for engaging a bicycle frame. The head member is disposed on the first end portion. The lever member is configured to turn the head member around an axis between a first position and a second position. The lever member presses the head member from the first end portion to the second end portion by being turned from the second position to the first position. The adjusting member is provided inside the axle member for adjusting an axial position of the head member.

A quick-release structure includes a shaft having a through hole and a circular magnetic member in the through hole; a circular shaft head having a slot at a front end thereof and two side holes; a stop ring connected with the circular shaft head screwed to the shaft; a drive lever having a lever head and a lever body, two sides of the drive lever having guide grooves respectively, the lever body being inserted into the through hole, the lever head being inserted into the slot and a distal end of the lever body is attracted by the magnetic member; and two engaging members screwed to the side holes and leaning against the guide grooves, the drive lever being movable along the guide grooves, the engaging members functioning as a pivot so that the drive lever can be turned left and right to rotate the shaft.

A bicycle frame structure that is manufactured by forming left and right panels and then bonding them in a pipe in/are configured to include a first fixing member fixed to the rear end portion of a chain stay and a hanger coupled to the first fixing member, being configured for rotating around a hinge pin, and having an axle slit formed in a predetermined direction.