Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, a plurality of pawl members, and a plurality of elastic plates. The ratchet wheel has a plurality of oneway ratchet teeth. The drive seat has a support base which has a plurality of receiving slots. Each of the pawl members has a locking detent. Thus, when the pedal is driven backward (and the drive seat is rotated backward), each of the pawl members is fully hidden in the respective receiving slot, and the locking detent of each of the pawl members is detached from the oneway ratchet teeth constantly, so that each of the pawl members will not touch the ratchet wheel when the pedal is driven backward to prevent from incurring a noise.

Abstract: A bicycle hub comprises: a housing, a driving base in the housing, and an engaging unit for the driving base to drive the housing in a single direction. The engaging unit consists of several claws and elastic elements surrounding thereon. Each of the elastic elements is an arc hook and urges against the corresponding claw. The claws thus enable the driving base to drive the housing.

Abstract: A bicycle hub having pawl retaining function comprises a hub body including a ratchet face disposed on one end thereof to fit a ratchet barrel, the ratchet barrel including a positioning holder mounted on one end thereof relative to the ratchet face, the positioning holder including a number of receiving cavities to receive pawl members, and between the receiving cavities being arranged a number of engaging slots on raised rims thereof, each pawl member including a retaining groove fixed thereon relative to the engaging slot so that the pawl members are positioned in the receiving cavities by using a binding member and one end of each pawl member extends flexibly, characterized in that: the binding member is a closed spring member so that as the pawl members are bound and retained to the positioning holder, the pawl members swing independently from each other by ways of the binding member.

Abstract: The bicycle pedaling system includes a weighted outer disc having a bicycle chain sprocket(s) mounted on one side, the outer disc having a central bore with a plurality of ratchet teeth projecting inwardly at an angle from the interior surface of the central bore. An inner disc is coaxially mounted in the central bore, the inner disc being journaled to bicycle pedals, the inner disc having at least one pawl projecting from its periphery to selectively engage the ratchet teeth. When pedaling, the pawl engages the ratchet teeth and propels the bicycle, and when pedaling is stopped, the outer disc freely rotates about the inner disc to thereby provide continuous momentum to ease subsequent resumption of pedaling effort.

Abstract: A high efficiency bicycle hub for near frictionless free wheeling comprising a hub having a toothed engagement ring, a driver having a retractable engagement member that can engage and disengage from the hub, and a retraction device to facilitate a disengaged configuration. The retraction device comprises a retaining ring having retraction members and the retractable engagement member comprises reciprocal retraction members to “catch” the retraction member to maintain a disengaged configuration. In use, forward rotation of the driver engages the retractable engagement member with the toothed engagement ring of the hub to drive the hub. Reverse rotation of the driver rotates the reciprocal retraction members underneath or behind the retraction member thereby disengaging the driver from the hub.

Abstract: A rear hub for a bicycle includes a mandrel, a hub body, a first locking nut, a freewheel, an auxiliary threaded post, and a second locking nut. The mandrel has a primary threaded section and a secondary mounting portion which has a diameter smaller than that of the primary mounting portion. Thus, the secondary mounting portion of the mandrel has a smaller diameter so that the freewheel has a smaller diameter to reduce the tooth number of the driven gear to reduce the tooth number of the chainwheel to reduce the diameter of the chainwheel so as to reduce the whole volume and weight of the bicycle.

Abstract: A hub for a bicycle includes a shaft, a hub body rotatably mounted on the shaft, a drive seat rotatably mounted on the shaft and engaged with the hub body, and a self-lubricating bearing mounted between the drive seat and the shaft. The self-lubricating bearing has a radially and outwardly extending limit flange rested on the drive seat. Thus, the self-lubricating bearing has an inner wall contacting with an outer wall of the shaft completely and an outer wall contacting with an inner wall of the drive seat completely, so that the external force applied on the self-lubricating bearing is distributed evenly and smoothly to prevent the self-lubricating bearing from being distorted or deformed due to a stress concentration, thereby enhancing the lifetime of the self-lubricating bearing.

Abstract: A free coaster bicycle wheel driving apparatus is provided with a clutch that employs radially acting, rather than axially acting components. An annular drive sleeve projecting inwardly from a drive sprocket is disposed within multiple transmission power transmission sleeves, which are disposed within a cylindrical wheel hub shell. The drive sleeve defines multiple cam lobes and the power transmission sleeves define multiple cam lobes and multiple pockets. When the drive sleeve cam lobes are disposed in the power transmission sleeve pockets, the driving apparatus is disengaged and allowed to free coast. Upon forward rotation of the driving apparatus, the drive sleeve cam lobes rotate toward and engage the power transmission sleeve cam lobes, thereby forcing the power transmission sleeve radially outward towards the wheel hub shell, thereby allowing the sprocket to engage the wheel hub.

Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, a plurality of pawl members, and a plurality of elastic plates. The ratchet wheel has a plurality of oneway ratchet teeth. The drive seat has a support base which has a plurality of receiving slots. Each of the pawl members has a locking detent. Thus, when the pedal is driven backward (and the drive seat is rotated backward), each of the pawl members is fully hidden in the respective receiving slot, and the locking detent of each of the pawl members is detached from the oneway ratchet teeth constantly, so that each of the pawl members will not touch the ratchet wheel when the pedal is driven backward to prevent from incurring a noise.

Abstract: A bicycle hub comprises an axle 5, a first part 7 being seated on the axle 5 and being provided with or connected to a cog 6, a second part 8 being movable relative to the first part 7 in longitudinal and rotational direction of the axle 5, the first part 7 and the second part 8 being in contact with each other via a screw coupling provided by threads 7? and 8?, a hub body 11 being arranged around at least the second part 8, the second part 8 being provided with a first cone surface 9, the hub body 11 having a second cone 10 surface formed thereon or connected thereto, wherein the two cone surfaces 9, 10 are engageable for power transmission, and wherein an adjustable stopper mechanism 12 is provided, limiting a gap providing space for an axial movement of the second part 8.

Abstract: A hub assembly for a bicycle includes a hub shell adapted to be rotatably mounted on a hub axle and having angularly displaced retreat bores for receiving pawls, respectively. An annular drive member is rotatably mounted on the hub axle and is rotated with a flywheel mounting cylinder. A circumferential surface of the drive member has a plurality of cavities confronting the retreat bores. Each cavity has first and second engaging walls which are mirror images of each other such that, when the drive member is rotated in one of clockwise and counterclockwise directions, coupling ends of the pawls are respectively engaged with the first or second engaging walls to drive rotation of the hub shell, and such that, when the drive member is rotated in the other one of the clockwise and counterclockwise directions, the coupling ends are disengaged from the first or second engaging walls to be placed in an idle position.

Abstract: A transmission mechanism obtains reduced cost by facilitating a process for guide grooves formed on an inner cylinder of a ball spline mechanism and regulates a movement of a drive sprocket in an axial direction by means of a simple structure. A one-way clutch transmits torque only when a crankshaft rotates positively to a drive sprocket through a ball spline mechanism. A clutch outer body and an inner slide member of the ball spline mechanism are composed of members separate from and coupled to each other by coupling pins to be integrally rotatable in an overlapping portions in an axial direction. Guide grooves for housing balls of the ball spline mechanism are formed on the inner slide member while opening to the axial direction at both ends thereof in the axial direction.

Abstract: A freewheel basically has an inner tubular member, an outer tubular member rotatably mounted on an inner tubular member with a clutch pawl selectively connecting the outer and inner tubular members together. A pawl-retracting member is disposed between the outer and inner tubular members with the pawl-retracting member frictionally engaged with the internal circumferential surface of the outer tubular member to rotate with the outer tubular member between a pawl-retracting position in which the pawl-retracting member maintains the clutch pawl in a disengagement position and a pawl-releasing position in which the pawl-retracting member releases the clutch pawl to move to an engagement position.

Abstract: A hub and axle assembly includes a hub surrounding an axle. An inner surrounding surface of the hub has larger and smaller mounting segments defining therein first and second annular spaces, respectively. A tubular drive member includes a chainring carriage segment spaced apart from the axle by a first bearing mounting groove, a positioning segment which is insertable into the first annular space and which is spaced apart from the larger diameter segment by a second bearing mounting groove, and a pawl mounting segment insertable into the second annular space. A uni-directional mechanism is disposed between the pawl mounting segment and the smaller-mounting segment. First and second rolling-element bearing units are disposed in the first and second bearing mounting grooves, respectively, to stabilize rotation of the chainring carriage segment and the hub relative to the axle.

Abstract: A ratchet gear device is applied for a bicycle rear wheel having a wheel axle and a hub mounted on the wheel axle, and the ratchet gear device has a freewheel, a collar, a ratchet ring and at least one permanent magnet. The freewheel is mounted around the wheel axle and has multiple wedging teeth. The collar is magnetic, is mounted securely in the hub and has multiple engaging teeth. The ratchet ring is mounted in the collar and has multiple engaging slots and multiple ratchet teeth. The engaging slots engage the engaging teeth in the collar. The ratchet teeth engage the wedging teeth on the freewheel. The at least one permanent magnet is attached to the ratchet ring to provide a magnetic force to move the ratchet ring to an engaging position where the ratchet teeth engages the wedging teeth on the freewheel.

Abstract: A bicycle hub assembly comprises a shaft, a first load bearing adjacent said shaft, a hub main body surrounding said shaft, and a cogset. The cogset can define an inner surface, and the inner surface can define a seat configured to receive the first load bearing. Further, the inner surface can define an opening of variable size. The cogset can also define an inner end and an outer end, and the opening can generally increase in size from the outer end to the inner end.

Abstract: A hub for bicycles, having an axle and a shell, two bearing units arranged substantially between the hub axle and the hub shell, and a rotor rotatably supported relative to the hub axle for receiving a sprocket the rotor, and a freewheel having two toothed disc units with biased tooth faces for transmitting the drive torque from the rotor to the hub shell. The two toothed disc units are disposed around the hub axle upon assembly, they are, at idle, disposed transverse to the hub axle. At least one toothed disc unit includes a toothed disc having a hole, a radial wall and an axial toothed wall, wherein an inner diameter of the hole is smaller at the axial wall than an inner dimension in the radial wall to form a receiving space at the toothed disc between the clear inner diameter of the axial wall and the radial wall.

Abstract: A free coaster bicycle wheel driving apparatus having a clutch that employs radially acting components. A drive sleeve has an inner cylindrical wall surface mounted coaxially about a wheel mounting shaft and an outer cylindrical wall surface that is eccentric relative to the drive sleeve inner wall surface. The outer surface of the drive sleeve cooperates with a power transmission sleeve that has an inner cylindrical wall surface that is eccentric relative to its cylindrical outer wall surface. The power transmission sleeve is interposed between the drive sleeve and a wheel hub. When the eccentric lobe on the drive sleeve is in opposition to the eccentric lobe on the surrounding power transmission sleeve, the sprocket is disengaged from the wheel hub. Forward rotation of the sprocket jams the lobe of the drive sleeve against the power transmission sleeve, forcing its cam lobe outwardly into frictional engagement with the wheel hub.

Abstract: A hub assembly for a bicycle includes a hub shell rotatably mounted on a hub axle, a plurality of pawls disposed respectively in retreat bores in the hub shell to be moved between driven and idle positions, a chainring carrier rotatably mounted on the hub axle, a surrounding drive member coupled with the chainring carrier and having an annular ratchet segment to be coupled with the pawls so as to form a uni-directional mechanism, and an annular barrier member that confronts an annular insertion opening in the hub shell, and a shielding member including a rim which is water-tightly engaged with the insertion opening, and an annular flexible web body which has a tubular tail portion that is kept in frictional contact with a protrusion of the annular barrier member.

Abstract: A wheel hub with clutch where power is transferred through a drive, such as a chain that is linked between a peddle arrangement and a gear or gears splined onto the hub. The hub provides free-wheeling when torque is not applied thereto and will instantly engage, transferring an applied torque therethrough and into a wheel connected to the hub when torque is applied as through a peddle arrangement. For locking, the hub includes, as a radial load bearing component, a sleeve whereon a gear or gears are splined, with the splined gear sleeve mounting a thick ring for fitting into an end of a hub body. The thick ring contains spaced sloping slots, each containing a ball bearing. The hub body includes an annular ring that receives the thick ring fitted there and has spaced steps, or the like, formed therein to engage the ball bearing surfaces, transferring torque.

Abstract: A spoked bicycle wheel hub is provided. The hub has a central tubular portion and a pair of side caps, whose diameter is larger than the central tubular portion. The hub is a monolithic fiber-reinforced plastic structure where the central tubular portion and the side caps form a continuous surface.

Abstract: Wheel hub having a central tubular portion and a pair of side caps, whose diameter is larger than the said central portion is provided. The hub comprises a monolith body made of fiber-reinforced plastic material.

Abstract: A bicycle sprocket assembly includes a sprocket element and a chain protector. The sprocket element has a plurality of teeth disposed on an outer periphery about a center rotation axis and at least one first attachment element. The chain protector includes a protecting portion and an attachment portion disposed radially inwardly of the protecting portion. The attachment portion has at least one second attachment element that mates with the first attachment element in response to relative rotational movement between the sprocket element and the chain protector.

Abstract: A hub driving assembly is adapted to uni-directionally transmit a driving force of a sprocket to rotate a hub, and includes a sprocket-mounting cylinder having retreat bores which respectively extend from a tubular end surface through an outer cylindrical surface, and positioning holes which extend axially from the tubular end surface. A plurality of pawls are disposed in the retreat bores, and are biased by biasing members in the retreat bores to be movable between a driving position, where the pawls extend radially and outwardly for engaging the hub, and an idle position, where the pawls retreat into the retreat bores. A barrier member includes a ring abutment and a plurality of inserts fitted into the positioning holes to bring the ring abutment into abutment against the tubular end surface so as to prevent removal of the pawls and the biasing members from the bores.

Abstract: A free coaster bicycle wheel driving apparatus having a clutch that employs radially acting components. A drive sleeve has an inner cylindrical wall surface mounted coaxially about a wheel mounting shaft and an outer cylindrical wall surface that is eccentric relative to the drive sleeve inner wall surface. The outer surface of the drive sleeve cooperates with a power transmission sleeve that has an inner cylindrical wall surface that is eccentric relative to its cylindrical outer wall surface. The power transmission sleeve is interposed between the drive sleeve and a wheel hub. When the eccentric lobe on the drive sleeve is in opposition to the eccentric lobe on the surrounding power transmission sleeve, the sprocket is disengaged from the wheel hub. Forward rotation of the sprocket jams the lobe of the drive sleeve against the power transmission sleeve, forcing its cam lobe outwardly into frictional engagement with the wheel hub.

Abstract: A hub for a bicycle includes a shaft, a hub body rotatably mounted on the shaft, a drive seat rotatably mounted on the shaft and engaged with the hub body, and a self-lubricating bearing mounted between the drive seat and the shaft. Thus, the self-lubricating bearing has an inner wall contacting with an outer wall of the shaft completely and an outer wall contacting with an inner wall of the drive seat completely, so that the external force applied on the self-lubricating bearing is distributed evenly and smoothly to prevent the self-lubricating bearing from being distorted or deformed due to a stress concentration, thereby enhancing the lifetime of the self-lubricating bearing.

Abstract: A hub assembly for a bicycle includes a hub shell rotatably mounted on a hub axle, a plurality of pawls disposed respectively in retreat bores in the hub shell to be moved between driven and idle positions, a chainring carrier rotatably mounted on the hub axle, a surrounding drive member coupled with the chainring carrier and having an annular ratchet segment to be coupled with the pawls so as to form a uni-directional mechanism, and an annular barrier member that confronts an annular insertion opening in the hub shell, and a shielding member including a rim which is water-tightly engaged with the insertion opening, and an annular flexible web body which has a tubular tail portion that is kept in frictional contact with a protrusion of the annular barrier member.

Abstract: A bicycle multi-gear cassette mountable to a wheel hub driver mechanism that includes truncated conical shell having a first opening proximate a small shell base and a second opening proximate a large shell base. The openings are coaxial with an axis of the shell. A plurality of toothed sprockets having different numbers of teeth are disposed on the shell and extend radially of the central axis. A torque load transmitting profile is configured on the shell proximate one of the small and large shell bases. A radial load transmitting profile is configured on the shell proximate one of the small and large shell bases. The shell, sprockets, and the load transmitting profiles embody a single piece. The torque load transmitting profile forms a featureless contact surface for frictional engagement with the hub driver mechanism.

Abstract: The present invention refers to a bicycle hub being part of the drive mechanism 1 of a BMX bicycle comprising: an axle 5, a first part 7 being seated on said axle 5 and being provided with or connected to a cog 6, a second part 8 being movable relative to said first part 7 in longitudinal and rotational direction of said axle 5, said first part 7 and said second part 8 being in contact with each other via a screw coupling provided by threads 7? and 8?, a hub body 11 being arranged around at least said second part 8, said second part 8 being provided with a first cone surface 9, said hub body 11 having a second cone 10 surface formed thereon or connected thereto, wherein said two cone surfaces 9, 10 are engageable for power transmission, wherein a cassette 6 with several sprockets 6a is connected to the first part 7.

Abstract: A freewheel basically has an inner tubular member, an outer tubular member rotatably mounted on an inner tubular member with a clutch pawl selectively connecting the outer and inner tubular members together. A pawl-retracting member is disposed between the outer and inner tubular members with the pawl-retracting member frictionally engaged with the internal circumferential surface of the outer tubular member to rotate with the outer tubular member between a pawl-retracting position in which the pawl-retracting member maintains the clutch pawl in a disengagement position and a pawl-releasing position in which the pawl-retracting member releases the clutch pawl to move to an engagement position.

Abstract: A hub for bicycles, having an axle and a shell, two bearing units arranged substantially between the hub axle and the hub shell, and a rotor rotatably supported relative to the hub axle for receiving a sprocket the rotor, and a freewheel having two toothed disc units with biased tooth faces for transmitting the drive torque from the rotor to the hub shell. The two toothed disc units are disposed around the hub axle upon assembly, they are, at idle, disposed transverse to the hub axle. At least one toothed disc unit includes a toothed disc having a hole, a radial wall and an axial toothed wall, wherein an inner diameter of the hole is smaller at the axial wall than an inner dimension in the radial wall to form a receiving space at the toothed disc between the clear inner diameter of the axial wall and the radial wall.

Abstract: A sprocket has an inner collar, an outer collar and a unidirectional device. The outer collar is mounted around the inner collar and has an annular channel and a teeth plate. The annular channel is defined around the outer collar and has a bottom. The teeth plate is formed on and protrudes from the bottom of the annular channel and has twelve teeth evenly formed around the teeth plate. The unidirectional device is mounted between the inner collar and the outer collar to limit the inner collar to unidirectionally rotate with the outer collar. Accordingly, the sprocket with twelve teeth can improve the transmitting efficiency of the sprocket.

Abstract: A hub for a bicycle includes a hub body having ratchet teeth, a ratchet barrel having positioning grooves, a plurality of pawl members pivotally mounted in the positioning grooves of the ratchet barrel and engaged with the ratchet teeth of the hub body in one direction, and an elastic module enclosed around the pawl members elastically. The elastic module is formed by a plurality of loops connected with each other. Thus, the force applied by the pawl members on the elastic module are distributed by the loops of the elastic module in the axial and sideward directions, so that the elastic module has a greater strength and will not produce an elastic fatigue during a long-term utilization, thereby enhancing the lifetime of the elastic module.

Abstract: A power-assisted bicycle is provided with a one-way clutch that can also be used as a torque detection apparatus. The one-way clutch has a tooth part (112) mounted on a driven means and a piece part (100) mounted slidably yet non-rotatably on a drive shaft (4). The tooth part has a first engagement face (121) formed with a plurality of teeth (114) and the piece part has a second engagement face (110) formed with a plurality of pieces (102). The first engagement face and the second engagement face are disposed facing each other generally perpendicularly to the axial direction. A disc spring (124) is disposed on the rear face of the piece part. As the piece part rotates in the direction of running forward, the piece is engaged with a sharply sloping face of the tooth to engage with the tooth and the angle of the piece with respect to the second engagement face increases, whereby the piece slides so as to increase the distance from the tooth part in resistance to the disc spring.

Abstract: An apparatus and assembly method including a sprocket hub and a locking collar for go kart vehicles and other land vehicles with drive axles is provided. The present invention eliminates the need for two locking collars on either side of the sprocket hub. The invention further provides a lightweight sprocket hub with a hub neck portion adapted to receive a single locking collar. The sprocket hub fits loosely on the drive axle. The fin-like sprocket hub arms and sprocket hub extensions each have sprocket connection holes used to connect the sprocket hub to a drive sprocket. The locking collar engages the sprocket hub neck portion by means of two flanges located on the sprocket hub. As assembled, the sprocket hub and locking collar float and oscillate on the drive axle to compensate for chassis flex and chain bind such that acceleration of said kart vehicle is enhanced.

Abstract: A bicycle hub is provided with a hub axle, a hub shell, a freewheel, a first hub axle ball bearing and a second hub axle ball bearing. The freewheel is operatively mounted between the hub axle and the hub shell. The freewheel includes a driven member, a drive body, an inner freewheel ball bearing and an outer freewheel slide bearing. The driven member is fixed to the hub shell to rotate therewith, while the drive body is operatively coupled to the driven member by a one-way clutch mechanism. The inner freewheel ball bearing is disposed between the driven member and the drive body to rotatably support an inner end of the drive body on the driven member. The outer freewheel slide bearing is disposed between the driven member and the drive body to rotatably support an outer end of the drive body on the driven member.

Abstract: A hub assembly for a bicycle includes a hub shell adapted to be rotatably mounted on a hub axle, and having a plurality of angularly displaced retreat bores for receiving pawls, respectively, a flywheel mounting cylinder rotatably mounted on the hub axle and having a tubular coupling wall confronting the retreat bores, and an annular drive member including a coupling segment which is coupled to and which is rotated with the tubular coupling wall, and a toothed segment which extends into an annular accommodation space between the hub shell and the hub axle to be coupled with the pawls radially so as to form a uni-directional mechanism for driving the hub shell to rotate in a clockwise direction.

Abstract: A hub clutch device for a bicycle includes a threaded shaft, a hub, a positioning sleeve, a movable sleeve, an elastic member, a fixing seat, and a plurality of urging balls. Thus, each of the urging balls is moved between a respective one of the adjusting slots of the movable sleeve and a respective one of the adjusting slots of the fixing seat to detach the fixing seat and the movable sleeve from the positioning sleeve, so that when the positioning sleeve and the hub are rotated, the fixing seat is not rotated, so that the freewheel will not be rotated by the wheel when the pedal stops operating.

Abstract: A bicycle rear hub is configured to improve the external appearance and the resistant to corrosion of a drive body. The rear hub also has a hub shaft, a hub shell, a pair of bearing units, a one-way clutch, a sprocket, and a cover member. The hub shell is rotatably mounted to the hub shaft by the bearing units. The drive body is mounted to one end of the hub shell by the one-way clutch that transmits rotation from the drive body to the hub shell in one direction. The sprocket is fixedly mounted to a radially outward-facing surface of the drive body. The cover member is mounted to the drive body 19 to cover the radially outward-facing surface of the drive body and with its tip edge contacting the outside lateral surface of the sprocket.

Abstract: This invention discloses a bicycle ratchet bushing, comprising a bushing for coupling to a connecting axle rod to drive the bicycle wheel to rotate, a pawl ring disposed on the inner side of the bushing, a plurality of pawls interdentally dispersed around the outer periphery of the ratchet ring, a resilient ring surrounding each pawl, such that the inner end of the pawl is a pivotal circular turning end, and the outer end is a moving end capable of opening outwards and retracting, and a pawl ring being sheathed outside the ratchet wheel, such that a buffer space is designed at the internal diameter of the pawl ring to prevent noise production from friction between the resilient ring and the pawl ring of the bushing.

Abstract: A free-wheel hub assembly includes an axle co-axially extending through a spoke-mounting hub and having a right axle portion disposed outwardly of a right end of the spoke-mounting hub. A tubular sleeve is sleeved on the axle, and is disposed in a right recess defined by the right end of the spoke-mounting hub. A self-lubricating bearing is sleeved on the tubular sleeve, is disposed in the right recess, and has an inner surface in sliding contact with the tubular sleeve. A sprocket mounting member is sleeved on the right axle portion, and has an annular coupling end which extends into the right end of the spoke-mounting hub and which is in sliding contact with an outer surface of the self-lubricating bearing.

Abstract: A power-assisted bicycle is provided with a one-way clutch that can also be used as a torque detection apparatus. The one-way clutch has a tooth part (112) mounted on a driven means and a piece part (100) mounted slidably yet non-rotatably on a drive shaft (4). The tooth part has a first engagement face (121) formed with a plurality of teeth (114) and the piece part has a second engagement face (110) formed with a plurality of pieces (102). The first engagement face and the second engagement face are disposed facing each other generally perpendicularly to the axial direction. A disc spring (124) is disposed on the rear face of the piece part. As the piece part rotates in the direction of running forward, the piece is engaged with a sharply sloping face of the tooth to engage with the tooth and the angle of the piece with respect to the second engagement face increases, whereby the piece slides so as to increase the distance from the tooth part in resistance to the disc spring.

Abstract: A free-wheel hub assembly includes an axle extending through a hub and having an annular axle flange projecting radially and outwardly therefrom into a right recess defined by a right end of the hub. A self-lubricating bearing is slidably sleeved on the axle flange. A sprocket-mounting member is sleeved on the axle flange, and has an annular coupling end which extends into the right recess and which is in sliding contact with the self-lubricating bearing. An inner bearing is sleeved on the axle and abuts against one end of the axle flange. An outer bearing is sleeved on the axle and abuts against the other end of the axle flange. A ratchet unit is coupled to the sprocket-mounting member and the hub.

Abstract: A wheel hub having a central tubular portion and at least one end cap which is formed integrally with the central portion and has thickness greater than the central tubular portion. The hub is a monolith fiber-reinforced plastic structure wherein the central portion and the side cap form a continuous surface.

Abstract: A power-assisted bicycle is provided with a one-way clutch that can also be used as a torque detection apparatus. The one-way clutch has a tooth part (112) mounted on a driven means and a piece part (100) mounted slidably yet non-rotatably on a drive shaft (4). The tooth part has a first engagement face (121) formed with a plurality of teeth (114) and the piece part has a second engagement face (110) formed with a plurality of pieces (102). The first engagement face and the second engagement face are disposed facing each other generally perpendicularly to the axial direction. A disc spring (124) is disposed on the rear face of the piece part. As the piece part rotates in the direction of running forward, the piece is engaged with a sharply sloping face of the tooth to engage with the tooth and the angle of the piece with respect to the second engagement face increases, whereby the piece slides so as to increase the distance from the tooth part in resistance to the disc spring.

Abstract: Clutch for a pedal vehicle having pedals and a frame and a method of transmitting power from the pedals, wherein the clutch is shiftable in two rotational directions. The clutch includes a drive shaft which can rotate in each of two directions upon corresponding rotation of the pedals in each of the two directions. A catch element is fixedly secured to the drive shaft. A driven shaft is provided. An engagement mechanism is arranged between the drive shaft and the driven shaft. A fixed member is provided. A holding element frictionally engages the fixed member. A spring element is biased to release the engagement mechanism from engagement with the driven shaft. The clutch allows the pedal vehicle to be moved in each of the two directions with or without corresponding movement of the pedals.

Abstract: A wheel hub with clutch where power is transferred through a drive, such as a chain that is linked between a peddle arrangement and a gear or gears splined onto the hub. The hub provides free-wheeling when torque is not applied thereto and will instantly engage, transferring an applied torque therethrough and into a wheel connected to the hub when torque is applied as through a peddle arrangement. For locking, the hub includes, as a radial load bearing component, a sleeve whereon a gear or gears are splined, with the splined gear sleeve mounting a thick ring for fitting into an end of a wheel sleeve. The thick ring contains spaced sloping pockets, each containing a ball bearing. The wheel sleeve includes an annular ring that receives the thick ring fitted there and has spaced steps, or the like, formed therein to engage the ball bearing surfaces, transferring torque.

Abstract: A wheel hub with clutch where power is transferred through a drive, such as a chain that is linked between a pedal arrangement and a gear or gears splined onto the hub. The hub provides free-wheeling when torque is not applied thereto and will instantly engage, transferring an applied torque therethrough and into a wheel connected to the hub when torque is applied as through a pedal arrangement. For locking, the hub includes, as a radial load bearing component, a sleeve whereon a gear or gears are splined, with the splined gear sleeve mounting a thick ring for fitting into an end of a wheel sleeve. The thick ring contains spaced sloping pockets, each containing a ball bearing. The wheel sleeve includes an annular ring that receives the thick ring fitted there and has spaced steps, or the like, formed therein to engage the ball bearing surfaces, transferring torque.

Abstract: An inner cylinder 5 supports and drives a hub shell 1. A sprocket hub 10 is rigidly mounted on one end of the cylinder, and may be integral with it. A bearing 2 at each end of the axle supports the cylinder and sprocket hub for rotation about the axle 1 Outer bearings 16 between the cylinder and hub shell rotationally supported hub shell. A circular ratchet 8 in the interior of the hub shell, and corresponding pawls 6 on the exterior of the cylinder, drive the hub shell when torque is applied to th sprocket hub, and allow the shell to freewheel otherwise. A more central position of the pawl drive in the hub shell compare to prior designs reduces twist of the shell. Wide separation of the bearings supporting the sprocket hub and cylinder provide a highly stable sprocket hub. These features maximize transmission efficiency and reliability.

Abstract: The invention relates to a hub for bicycles and the like, comprising a hub axle and a hub housing concentrically mounted in relation thereto including a bearing device having at least two bearings mounted between the axle and the housing. A rotor (25) for receiving at least one toothed wheel is disposed on the hub axle (4) and a free-wheel device is arranged between the rotor and the housing of the hub, said device having two toothed discs (22, 23), the toothed surfaces of which are pressed against each other by a pretensioning device. The toothed surfaces of which are pressed against each other by a pretensioning device. The toothed discs are mounted ina substantially concentric manner in relation to the hub axle (4) on planes which are aligned perpendicular to the hub axle. The toothed discs are float mounted or fixed so that the toothed discs can be tilted in relation to the hub axle.