Abstract: A bicycle hub assembly includes a hub shell defining a toothed drive member mounting hole and a locating groove, a locating member having a positioning portion accommodated in the locating groove of the hub shell, and a toothed drive member having a first locating portion fastened to the positioning portion of the locating member and a plurality of teeth. In an alternate form of the invention, the bicycle hub assembly includes a hub shell defining therein a toothed drive member mounting hole and a plug hole; a locating member having a positioning portion and a plug portion that is plugged into the plug hole of the hub shell, and a toothed drive member having a first locating portion fastened to the positioning portion of the locating member and a plurality of teeth formed therein.

Abstract: A hub for at least partially muscle-powered vehicles having a hub axle, a hub body, a rotatable driving device, and a freewheel device. The freewheel device includes a first and a second engagement component cooperating with one another having at least one axial toothing each. The freewheel device is biased to the engaging position via a magnetic biasing device. A first magnetic device biases the first engagement component and a second magnetic device biases the second engagement component to the engaging position. At least one magnetic component comprises a carrier unit and a multitude of magnetic units disposed thereat.

Abstract: The invention relates to a freewheel hub for a bicycle including an axle and housing rotatably mounted thereon. A sprocket arrangement is mounted on the hub axle and a freewheel is arranged between the hub and the sprocket arrangement. The freewheel has a first coupling ring which couples to the hub and a second coupling ring which couples to the sprocket arrangement. The first and second coupling rings have respective tooth systems facing one another which are arrangeable into and out of mutual torque-transmitting engagement.

Abstract: A wheel for pedal-assisted bikes includes a fixed structure associable with the frame having a driving pedal crank; a circle element rotatably mounted on the structure around a main rotation axis; a propulsion disc rotatably mounted on the structure and connectable to the driving pedal crank; motion transmission elements for transmitting rotary motion from the disc to the circle element, including a speed gear device for changing the motion transmission ratio from the disc to the circle element; and a first detection device suitable for detecting the force transmitted to the circle element from the disc; an electric motor associated with the structure for cooperating with the disc to motorize the circle element; a power supply for electrically supplying the motor; a processing and control unit for controlling the activation of the motor according to the force detected by the first detection device.

Abstract: A hub assembly for a bicycle includes a hub shell, a plurality of pawl units, and an annular ratchet member. The hub shell is rotatably mounted on a hub axle, and the annular ratchet member is disposed to rotate with respect to the hub axle. Each pawl unit includes a pawl that is movable between driven and idle positions, an elongated mount that extends to bridge a gap formed in the pawl, and a biasing member that is mounted on the elongated mount to bias the pawl to move to the driven position so as to engage to the annular ratchet member.

Abstract: Wheel hub, in particular bicycle rear wheel hub, comprising hub shell and freewheel shell both supported by bearings to be rotatable relative to the hub axle, where the hub shell is slidingly coupled through spline coupling with a freewheel coupling ring provided with axial pawl teeth on its axial face, wherein an annular permanent magnet (6) is seated in the freewheel coupling ring (3), and another permanent magnet (5) is arranged coaxial to the permanent magnet (6) in the hub shell (1), while the axial pawl teeth (B) of the freewheel coupling ring (3) intermesh with the axial pawl teeth (C) of the freewheel shell (4), and also the inner ring of the bearing (7a) disposed in the hub shell (1) abuts against a hub axle (2) collar (16) and the outer ring of the bearing (7a) is urged towards the said hub axle (2) collar (16) by an adjusting screw (10) screwed in the hub shell (1) from the non-drive side, while the inner ring of the bearing (7b) abuts against the hub axle collar (17) and its outer ring abuts on th

Abstract: Hub for two-wheeled vehicles having a hub axle and a hub body and a rotor and with a toothed disk freewheel comprising a pair of interacting engagement components each comprising one axial toothing. The engagement components are biased in the engagement position via a biasing device. The one of the engagement components is received at the hub body to be non-rotatable and axially displaceable and the other of the engagement components is provided non-rotatable at the rotor for transmitting a rotary motion from the rotor to the hub body in the engagement position of the two engagement components. At least one engagement component is configured as a toothed disk and is provided with the axial toothing and has an axial width which is at least the size of half the outer radius of the axial toothing.

Abstract: An electric hub unit includes a hub composed of first casing and a second casing. An electric unit is located between the first and second casings. An axle extends through two respective centers of the first and second casings. The first casing has a reception recess defined in one side thereof. A first extension and a second extension extend axially from the first casing and toward in opposite directions. A bearing is located in the inside of the second extension. A socket unit has a tubular portion and a ratchet unit is connected to the socket unit. The socket unit is mounted to outside of the first casing, and a bearing and a plate are located between the tubular portion and the first extension. The hub unit prevents water and foreign objects from entering into the hub.

Abstract: A freewheel hub and a bicycle, pedelec, fast pedelec or e-bike comprising this freewheel hub is provided. The freewheel hub comprises a rotating hub shell for carrying a free running wheel. Torque is coupled to the rotating hub shell via a torque transmitting member. At least one magneto-elastically active region is directly or indirectly attached to or forms a part of the torque transmitting member in such a manner that the applied torque is transmitted to the active region comprising at least one magnetically polarized region. The magnetic polarization becomes increasingly helically shaped as the applied torque increases. A magneto-elastic sensor means having at least one magnetic field sensor is arranged proximate to the at least one magneto-elastically active region for outputting a signal corresponding to a torque-induced magnetic flux emanating from the magnetically polarized region.

Abstract: A ratchet hub using a magnetic force for restoration as disclosed has a freewheel unit and a ratchet ring thereof forming a unidirectional ratchet mechanism and a magnetic assembly using a magnetically repulsive force to normally make the freewheel unit and ratchet ring engage mutually and allow force transmission therebetween. Once a force disengaging the freewheel unit from the ratchet ring surpasses the magnetically repulsive force, the ratchet ring is pushed away from the freewheel unit. When the force disengaging the freewheel unit from the ratchet ring disappears, the magnetically repulsive force automatically and promptly returns the ratchet ring to engage with the freewheel unit again.

Abstract: A ratchet mechanism of a bicycle hub includes a ring fixed in the hub. The ring has a tapered surface and a flange is formed in the inner periphery of the ring. A driving unit is located in the hub and has multiple first ratchet teeth extending axially therefrom. A passive unit is located in the tapered surface and corresponding to the driving unit. The passive unit has a passive seat which has a tapered outer face matched with the tapered surface. The passive seat further has a stop portion which is stopped by the flange in one direction. The passive seat has multiple second ratchet teeth engaged with the first ratchet teeth. A magnetic unit is located between the hub and the passive set, and two magnetic members which are magnetically repulsive to each other so as to linearly move the passive seat toward the driving portion.

Abstract: A twin clutch hub includes a one-way roller clutch and a ratchet pawl based clutch mounted to a bicycle hub. A chain wheel seat receives driving power from a bicycle rear wheel and is in operative coupling with the one-way roller clutch and the ratchet pawl based clutch, which are in turn operatively coupled to the hub. When the ratchet pawl based clutch shows a returning side tooth backlash that is greater than or equal to an angle of deformation of the one-way roller clutch, transmission is performed with the one-way roller clutch to make backlash approximating zero. When the angle of returning side tooth backlash of the ratchet pawl based clutch is smaller than or equal to the angle of deformation of the one-way roller clutch, transmission is performed through both the one-way roller clutch and the ratchet pawl based clutch to realize high efficiency twin clutch hub.

Abstract: A ratchet mechanism of a hub assembly is located between the hub and the tubular portion, and includes a driving member which is movable linearly in the tubular portion. One side of the driving member has a cone-shaped first ratchet portion located axially and is composed of two triangular contact surfaces. A passive member is fixed in the hub and has a cone-shaped second ratchet portion which is engaged with the first ratchet portion. A returning member is located between the hub and the driving member. The passive member is fixed to the hub easily. By the triangular cone-shaped first and second ratchet portions, the contact are and the friction between the ratchet portions are reduced, and the engagement and disengagement is more quick and smooth.

Abstract: The present invention relates to a rear wheel hub for a bicycle, a rear wheel for a bicycle, and a bicycle. In order to provide a rear wheel hub which, with a further reduction in weight, still allows reliable transmission of force, the hub has a hub body (12), an axle body (14), a first bearing device (16) between the axle body and the hub body, a freewheel body (18) for accommodating at least one sprocket, a second bearing device (20) between the axle body and the freewheel body, and a freewheel arrangement (22) between the freewheel body and the hub body which in a first rotational direction (26) about the rotational axis establishes a coupling between the freewheel body and the hub body, and in a second rotational direction (28) which is opposite that of the first rotational direction, the freewheel body is freely rotatable with respect to the hub body.

Abstract: A bicycle hub driving system includes a hub with a socket unit connected thereto. An axle unit extends through the hub and the socket unit. A clutch driving device is located between the ratchet unit and the hub. The clutch driving device includes a clutch unit, a driving unit and a driving member located between the clutch unit and the driving unit. The clutch unit includes a first ratchet portion on the ratchet unit and a second ratchet portion on the driving member. The driving unit includes first driving teeth on the hub and second driving teeth on the driving member. By the linear movement of the riving member between the first driving teeth and the first ratchet portion, the first and second ratchet portions are engaged with each other or disengaged from each other to co-rotate the hub and the socket unit in one direction.

Abstract: A hub assembly includes a ratchet mechanism located between the hub and the tubular portion on one end of the hub, and including a driving member which is located in the tubular portion and is movable linearly. One side of the driving member has a cone-shaped first ratchet portion located axially and is composed of two triangular contact surfaces. A passive member is movable in the first slot and one side of the passive member has a cone-shaped second ratchet portion which is engaged with the first ratchet portion. A returning member unit is located between the hub and the passive member, and between the tubular portion and the driving member. By the triangular cone-shaped first and second ratchet portions, the contact area and the friction between the ratchet portions are reduced, and the engagement and disengagement is more quick and smooth.

Abstract: A hub for at least partially muscle-powered vehicles having a hub axle, a hub body, a rotatable driving device, and a freewheel device. The freewheel device includes a first and a second engagement component cooperating with one another having at least one axial toothing each. The freewheel device is biased to the engaging position via a magnetic biasing device. A first magnetic device biases the first engagement component and a second magnetic device biases the second engagement component to the engaging position. At least one magnetic component comprises a carrier unit and a multitude of magnetic units disposed thereat.

Abstract: A driving structure for a wheel hub of a bicycle includes a wheel hub having a ratchet wheel, a ratchet base having an operating member and connected to the wheel hub, an engaging block and an elastic member both assembled onto the operating member, the elastic member abutting against the engaging block so that the engaging block is engaged with the ratchet wheel, a rotating ring assembled between the ratchet wheel and the operating member and having a plurality of abutting plates, each abutting plate abutting against the corresponding engaging block, an elastomer defined on the operating member and abutting against the rotating ring. Under this arrangement, the ratchet wheel simultaneously engages with the engaging blocks, because of the rotating ring and the elastomer.

Abstract: A sprocket support structure includes a main body, a plurality of projections and an abutment ring. The main body includes an outer surface with a plurality of parallel extending sprocket attachment splines defining a plurality of sprocket engaging grooves between the sprocket attachment splines. The projections extend radially outward farther than the sprocket attachment splines with respect to a rotation axis of the main body. Each of the projections includes a first surface facing in a first axial direction of the main body. The abutment ring is disposed on the main body as a separate member from the main body. The abutment ring includes a second surface facing in the first axial direction and axially spaced from the first surfaces of the projections with respect to the rotation axis. The second surface of the abutment ring is exposed between the projections as viewed along the sprocket engaging grooves.

Abstract: A hub includes an arbor shaft, a ratchet wheel, an internally-toothed ring, a shell, a clutch member and a second spring. The ratchet wheel includes at least one chain wheel, a plurality of concavities, a plurality of pawls and a plurality of first springs. The chain wheel and the concavities are disposed on two opposite sides of the ratchet wheel respectively. Each pawl has a first end and a second end. Each spring has a first end and a second end. The internally-toothed ring surrounds the pawls and has an inner periphery formed with a plurality of inner teeth. The clutch member has an axial hole and a cam. The present invention is advantageous in the way that the pawls and the internally-toothed ring do not make “kada-kada” rattle noise nor drive the pedals during idle running of the hub.

Abstract: A driving apparatus for a rear hub of a bicycle includes a hub shell, a single-directional driving component and a dual-directional driving component, wherein the single-directional driving component has a ratchet ring and a ratchet base, and a plurality of inclined helical surfaces are located around an inner perimeter of the ratchet ring, and a plurality of engaging ribs that engage with the wedging ribs of the fixed ring of the hub shell are located around an outer perimeter of the ratchet ring. A plurality of conjugating portions are located around an outer perimeter at one end of the ratchet base to form a resilient unit and a hook against the inclined helical surface. A plurality of conjugating ribs are located around one end of the dual-directional driving component, and the conjugating ribs are used to engage with the wedging ribs of the fixed ring of the hub shell.

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 reinforcement structure for bearings of a bicycle hub assembly includes a hub and an axle extends through the hub. A connection portion is defined in one end of the hub. A ratchet sleeve has a transmission portion located on one end thereof and a bearing is located in the transmission portion. Multiple slots are defined in outside of the transmission portion and the axle extends through the ratchet sleeve. A ratchet unit having multiple ratchet teeth and a ratchet ring which is connected to the connection portion. The ratchet teeth are engaged with the slots. The ratchet ring has multiple ratchet slots defined in the inner periphery thereof and the ratchet teeth are engaged with the ratchet slots. A positioning unit has a positioning member located on one side of the bearing so as to prevent the bearing from shifting axially.

Abstract: A torque coupling assembly including: a driving assembly with a driving axle and a rotatable driving shell; a driven assembly with a driven axle and a rotatable driven shell; and a frame element. The driving and driven shells each include an axial projection. In an assembled position, the driving and driven assemblies are both connected to the frame and their respective axial projections are aligned to transmit rotational torque between the driving shell and the driven shell. In a removed position, one of the driving assembly and the driven assembly may be removed in a generally radial direction relative to the frame and the other of the driving assembly and the driven assembly. The driving and/or driven assembly may include ramped lead-in geometry. The driving and/or driven assembly may include shielding geometry to axially overlap at least a portion of the axial projection.

Abstract: A bicycle hub assembly includes a hub having a driving tube connected one end thereof and the driving tube includes a ratchet portion and a sprocket portion respectively defined in an outer periphery thereof. A first recess and a second recess are defined in an inner periphery of the driving tube, wherein the first recess is located corresponding to the ratchet portion and the second recess is located corresponding to the sprocket portion. A ratchet unit is mounted to the ratchet portion and a sprocket unit is mounted to the sprocket portion. A first rotary member and a second rotary member are engaged with the first recess and the second recess respectively.

Abstract: A ratchet hub using a magnetic force for restoration as disclosed has a freewheel unit and a ratchet ring thereof forming a unidirectional ratchet mechanism and a magnetic assembly using a magnetically repulsive force to normally make the freewheel unit and ratchet ring engage mutually and allow force transmission therebetween. Once a force disengaging the freewheel unit from the ratchet ring surpasses the magnetically repulsive force, the ratchet ring is pushed away from the freewheel unit. When the force disengaging the freewheel unit from the ratchet ring disappears, the magnetically repulsive force automatically and promptly returns the ratchet ring to engage with the freewheel unit again.

Abstract: A ratchet cylinder for a bicycle hub is provided with a cylinder member, a plurality of ratchet teeth, a plurality of springs and a C-ring. The C-ring circles around the connecting end of the cylinder member and engages in the grooves of the respective ratchet teeth, so as to retain the ratchet teeth in the receiving grooves and allow the ratchet teeth to pivot within a limited angle. The springs are disposed between the ratchet teeth and the ratchet cylinder to keep pushing the respective ratchet teeth of the hub shell into an engagement position with the teeth of the hub shell, so that the ratchet teeth can be surely engaged with the teeth.

Abstract: A ratchet cylinder for a bicycle hub is provided with a cylinder member, a plurality of ratchet teeth, a plurality of springs and a C-ring. The C-ring circles around the connecting end of the cylinder member and engages in the grooves of the respective ratchet teeth, so as to retain the ratchet teeth in the receiving grooves and allow the ratchet teeth to pivot within a limited angle. The springs are disposed between the ratchet teeth and the ratchet cylinder to keep pushing the respective ratchet teeth of the hub shell into an engagement position with the teeth of the hub shell, so that the ratchet teeth can be surely engaged with the teeth.

Abstract: A hub assembly includes a ratchet mechanism located between the hub and the tubular portion on one end of the hub, and including a driving member which is located in the tubular portion and is movable linearly. One side of the driving member has a cone-shaped first ratchet portion located axially and is composed of two triangular contact surfaces. A passive member is movable in the first slot and one side of the passive member has a cone-shaped second ratchet portion which is engaged with the first ratchet portion. A returning member unit is located between the hub and the passive member, and between the tubular portion and the driving member. By the triangular cone-shaped first and second ratchet portions, the contact area and the friction between the ratchet portions are reduced, and the engagement and disengagement is more quick and smooth.

Abstract: A ratchet mechanism of a hub assembly is located between the hub and the tubular portion, and includes a driving member which is movable linearly in the tubular portion. One side of the driving member has a cone-shaped first ratchet portion located axially and is composed of two triangular contact surfaces. A passive member is fixed in the hub and has a cone-shaped second ratchet portion which is engaged with the first ratchet portion. A returning member is located between the hub and the driving member. The passive member is fixed to the hub easily. By the triangular cone-shaped first and second ratchet portions, the contact are and the friction between the ratchet portions are reduced, and the engagement and disengagement is more quick and smooth.

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 hub shell of a hub assembly is rotatable about a fixed hub shaft. A power transmitting member is disposed within the hub shell. A pawl supporting member has at least one pawl member movable between an active position where the pawl member allows transmission of rotary power from the hub shell to the power transmitting member and an inactive position decoupling the pawl from one of the power transmitting member and the hub shell. A one way roller clutch assembly is coupled between the power transmitting member and the hub shell and is movable between an active position where the roller clutch assembly couples the power transmitting member to the hub shell to transmit rotary power from the power transmitting member to the hub shell and an inactive position decoupling the power transmitting member from the hub shell.

Abstract: A hub assembly includes a shaft, a hub mounted on the shaft and having a plurality of locking grooves, a driven ring mounted in the hub and having a plurality of oneway ratchet teeth, a drive seat rotatably mounted on the shaft, a drive ring mounted on the drive seat and received in the driven ring, a plurality of pawl members mounted on the drive ring and meshing with the oneway ratchet teeth, a sprocket secured on the drive seat, and a control ring slidably mounted on the drive seat and having a plurality of locking blocks releasably locked in the locking grooves. Thus, a user only needs to move the control ring to switch the operation modes of the bicycle between a normal riding and an acrobatic performance so that the user can change the two operation modes easily and quickly.

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 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 ratchet mechanism of a bicycle hub includes a ring fixed in the hub. The ring has a tapered surface and a flange is formed in the inner periphery of the ring. A driving unit is located in the hub and has multiple first ratchet teeth extending axially therefrom. A passive unit is located in the tapered surface and corresponding to the driving unit. The passive unit has a passive seat which has a tapered outer face matched with the tapered surface. The passive seat further has a stop portion which is stopped by the flange in one direction. The passive seat has multiple second ratchet teeth engaged with the first ratchet teeth. A magnetic unit is located between the hub and the passive set, and two magnetic members which are magnetically repulsive to each other so as to linearly move the passive seat toward the driving portion.

Abstract: A hub for a bicycle includes a shaft (12), a hub body (40), a ratchet wheel (43), a drive seat (10), a support ring (15), a rotation ring (21), a plurality of pawl members (22), a stop bushing (121), a limit ring (30) and a damper (33). Thus, when the drive seat is rotated backward by the pedal, each of the pawl members is retracted into the respective receiving slot (212) of the rotation ring to disengage the oneway ratchet teeth (42) of the ratchet wheel, so that each of the pawl members is spaced from and will not touch the ratchet wheel when the pedal is driven backward to prevent from producing a noise when the pedal is driven backward.

Abstract: A hub assembly for a bicycle includes a shaft (12), a hub body (40), a driven ring (43), a drive seat (10), a rotation ring (20), a plurality of pawl members (22), a plurality of push balls (23), a mounting sleeve (32), a damping ring (30), and a plurality of tension adjusting mechanisms (37). Thus, each of the pawl members is driven by each of the push balls in a rolling manner so that each of the pawl members is moved smoothly and stably without incurring sliding friction, thereby facilitating operation of the drive seat. In addition, each of the tension adjusting mechanisms is used to adjust the damping force of the damping ring, so that the damping force of the damping ring is distributed evenly.

Abstract: Wheel hub, in particular bicycle rear wheel hub, comprising hub shell and freewheel shell both supported by bearings to be rotatable relative to the hub axle, where the hub shell is slidingly coupled through spline coupling with a freewheel coupling ring provided with axial pawl teeth on its axial face, wherein an annular permanent magnet (6) is seated in the freewheel coupling ring (3), and another permanent magnet (5) is arranged coaxial to the permanent magnet (6) in the hub shell (1), while the axial pawl teeth (B) of the freewheel coupling ring (3) intermesh with the axial pawl teeth (C) of the freewheel shell (4), and also the inner ring of the bearing (7a) disposed in the hub shell (1) abuts against a hub axle (2) collar (16) and the outer ring of the bearing (7a) is urged towards the said hub axle (2) collar (16) by an adjusting screw (10) screwed in the hub shell (1) from the non-drive side, while the inner ring of the bearing (7b) abuts against the hub axle collar (17) and its outer ring abuts on th

Abstract: The present invention relates to a rear wheel hub for a bicycle, a rear wheel for a bicycle, and a bicycle. In order to provide a rear wheel hub which, with a further reduction in weight, still allows reliable transmission of force, the hub has a hub body (12), an axle body (14), a first bearing device (16) between the axle body and the hub body, a freewheel body (18) for accommodating at least one sprocket, a second bearing device (20) between the axle body and the freewheel body, and a freewheel arrangement (22) between the freewheel body and the hub body which in a first rotational direction (26) about the rotational axis establishes a coupling between the freewheel body and the hub body, and in a second rotational direction (28) which is opposite that of the first rotational direction, the freewheel body is freely rotatable with respect to the hub body.

Abstract: The present invention provides a bicycle wheel hub that generally includes an axle, an input sprocket, an output shell, a one-way clutch and a locking mechanism. The one-way clutch operatively connects the input sprocket and the output shell and is configured to drive the output shell in a first direction. The locking mechanism is configured to operatively connect the output shell and the input sprocket to drive the output shell in a second direction to operate the bicycle wheel hub in a fixed drive mode. The locking mechanism is configured to operatively disconnect the output shell and the input sprocket to operate the bicycle wheel hub in a freewheel drive mode.

Abstract: A protection structure for outer shell of a hub comprises: a hub and an outer shell mounted at one end of the hub, the outer shell is provided at one end close to the hub with an enlarged flange, on an outer peripheral surface of the outer shell are annularly and spaced-apart formed a plurality of splines and at least one positioning rib, at least at one side of each splines is disposed with a protecting member whose material is different from that of the outer shell. By such arrangements, the protecting member can be assembled with a sprocket to prevent the sprocket from touching the splines. Thus, damages of the outer shell of the hub are prevented.

Abstract: A two-wheel drive motorcycle having a drive train that supplies power to the front wheel and includes a series of rigid shafts or other internalized drive systems. The front wheel drive consists of components located on the axis of steering within the head tube and positioned symmetrically in a counterbalancing fashion within the front fork in order to counteract the torque reactions from the rotating front wheel drive while providing a full range of steering. The front wheel drive lengthens and shortens in parallel with the shock-absorbing front fork. An engagement clutch, a one-way hub, and torque limiting clutch operatively engaged with the front wheel drive are also disclosed.

Abstract: A hub ratchet driving assembly includes a hub and a driving member is connected to an end of the hub. The driving member includes a driving portion which has first and second recesses defined in an outer surface thereof so as to receive a pawl and a spring member therein. A teeth ring is connected to the hub and includes multiple teeth in an inner periphery thereof. The spring member biases the pawl so as to provide a return force to the pawl. The pawl includes two ratchet teeth which are engaged with the teeth of the teeth ring. A positioning unit has a first positioning slot defined in the driving portion and a second positioning slot is defined in the pawl. A positioning ring is mounted to the first and second slots so as to prevent the pawl from disengaging from the driving portion in axial direction.

Abstract: A bicycle hub assembly includes a hub having a driving tube connected one end thereof and the driving tube includes a ratchet portion and a sprocket portion respectively defined in an outer periphery thereof. A first recess and a second recess are defined in an inner periphery of the driving tube, wherein the first recess is located corresponding to the ratchet portion and the second recess is located corresponding to the sprocket portion. A ratchet unit is mounted to the ratchet portion and a sprocket unit is mounted to the sprocket portion. A first rotary member and a second rotary member are engaged with the first recess and the second recess respectively.

Abstract: A hub assembly includes a shaft, a hub mounted on the shaft and having a plurality of locking grooves, a driven ring mounted in the hub and having a plurality of oneway ratchet teeth, a drive seat rotatably mounted on the shaft, a drive ring mounted on the drive seat and received in the driven ring, a plurality of pawl members mounted on the drive ring and meshing with the oneway ratchet teeth, a freewheel secured on the drive seat, and a control ring slidably mounted on the drive seat and having a plurality of locking blocks releasably locked in the locking grooves. Thus, a user only needs to move the control ring to switch the operation modes of the bicycle between a normal riding and an acrobatic performance so that the user can change the two operation modes easily and quickly.

Abstract: A pawl for controlling the rotation of a gear in a planetary gear mechanism. The pawl includes a nose and first and second pivot axes. The nose is engageable with the gear. The pawl is rotatable about the first pivot axis between a first mode permitting rotation of the gear in a first direction and a second direction and a second mode preventing rotation of the gear in the first direction. The pawl is rotatable about the second pivot axis to permit rotation of the gear in the second direction while the pawl is the second mode.

Abstract: A ratchet hub device, which can be quickly meshed to drive a bicycle, includes a hub shell, a ratchet cylinder, and an axle. There are plural tooth sockets and two groups of receiving notches between the hub shell and the ratchet cylinder. The receiving notches of each of the two groups are arranged with an equal interval between each other. Each of the receiving notches of the one group is arranged next to one of the receiving notches of the other group. Two groups of receiving notches receive ratchet members therein and engage with the tooth sockets by turns. Thereby, when a rider re-pedals a bicycle, one group of the ratchet members engage with the near tooth sockets so as to quickly engage with the hub shell and drive the hub shell to rotate.

Abstract: A freewheel structure includes a freewheel. The freewheel has a teethed portion formed on an outer periphery thereof for adapting to engage with a bicycle chain. The freewheel has a pivotal hole centrally defined therein and extending therethrough for adapting to receive a spindle. The freewheel has a position portion disposed on an inner end of the pivotal hole for adapting to connect with a bicycle hub. The position portion of the freewheel is single-directionally and ratchetably rotated relative to the hub.

Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, and a plurality of pawl members. Thus, when the drive seat is rotatable backward, the locking detent of each of the pawl members is detached from the oneway ratchet teeth of the ratchet wheel constantly, so that each of the pawl members will not touch the ratchet wheel to prevent from incurring a noise. In addition, when the drive seat is rotatable backward, the hub body is separated from the drive seat, and rotation of the hub body will not drive the drive seat and the pedal to prevent the pedal from being driven when the hub body is rotated backward.