TWM638429U - Pawl-type free-sliding clutch mechanism for bicycle hub - Google Patents

Abstract

A pawl-type free-sliding clutch mechanism for a bicycle hub, comprising a driving member, a hub bushing, a plurality of pawls, a positioning member, a planetary gear assembly, a first resistance assembly, a first restraining assembly, and a second The resistance component and a second pinning component. Each of the elements is arranged in the hub shell, the driving member is coupled with the bicycle drive chain, and the hub bushing and the outer gear ring of the planetary gear assembly are fixedly connected to the hub shell respectively. When the hub bushing is engaged with the driving component through the pawl, the hub will be driven by the driving component. When the hub bushing is separated from the driving assembly, the bicycle can slide forward or backward through the planetary gear assembly, each of the resistance and each of the restraining assemblies, and the clutch mechanism can be kept in a constant slack state.

Description

Pawl-type free-sliding clutch mechanism for bicycle hub

The present invention is related to the bicycle hub, in particular to a pawl type free-sliding clutch mechanism of the bicycle hub.

Most of the general bicycle hubs are operated by a so-called over-running clutch. Such an overrunning clutch is usually a simple ratchet mechanism which, when engaged with the drive mechanism of the hub, allows the wheel to be driven forward or backward. One disadvantage of this mechanism is that the action of driving the bike backwards is no different from that of forward driving. In other words, to move the bike backwards, the crank and pedals also need to be turned backwards. This situation is inconvenient for the rider who needs to slide backwards freely (for example, when performing stunt riding).

In order to solve this shortcoming, a large number of different hub designs have been proposed at present. In general, these designs are such that the drive mechanism engages the hub only when the rider is pedaling forward. We usually refer to this type of design as a Freecoaster hub. But unfortunately, when the rider slides backwards, in case the rider accidentally steps forward, the driven part of this type of hub may suddenly engage with the drive mechanism, thereby transmitting the driving force on the wheel back to the crank through the chain, forcing The crank rotates backwards with considerable force, which could cause the rider to accidentally fall. In order to improve this lack, such free coaster hubs usually maintain a large degree of clearance or slack before the driven part is engaged with the drive mechanism to reduce the accidental engagement of the driven part with the drive mechanism Opportunity. But in this way, when the bicycle is to be pedaled forward, the rider must perform a large pedaling action to engage the driven part with the drive mechanism, and this situation is not liked by the rider because it will speed up Slower and less smooth pedaling. Also, the rider must carefully reset this slack to ensure that the drive mechanism is not accidentally activated. That is, after pedaling, the rider needs to pedal back slightly to reopen the gap/slack between the drive mechanism and the hub follower before turning the bicycle to coast backwards. Moreover, this gap/slack state may have inconsistencies. For example, if the hub is designed so that the maximum slack/play is a quarter of a turn of the pedal, the rider will need to pedal back at least a quarter of a turn to fully open the gap. If the rider misjudges this and only pedals back a tenth of a turn, or if the drive mechanism wobbles from shocks like stunt/jump landings, there may be less angle of pedal movement before engagement. This means that riders may never be sure how much pedaling they need before starting a ride. If the drive mechanism is activated earlier or later than expected, it may upset the rider's balance and may even cause the rider to fall from the vehicle. To combat this, riders often start by pedaling very carefully to ensure that the drive mechanism is properly engaged before pedaling hard to gain speed, but doing so can waste speed transitioning between tricks .

In addition, the Republic of China Patent No. I717390 discloses a hub design, which attempts to partially solve these problems by continuously braking the driving mechanism of the hub in the direction of wheel rotation. That is, forward movement of the hub engages the drive mechanism with the driven element, and rearward movement of the hub disengages the drive mechanism from the driven element. Unfortunately, this approach still has its flaws. It can cause the bike's wheels to spin forward (such as during a jump) and reverse immediately before landing, with undesirable results. Because the wheels spinning forward constantly bias the drive mechanism into engagement, there's a good chance they will engage before the wheels spin back enough to disengage them when landing. In other words, the drive mechanism could be forced into engagement with the driven element upon landing, at which point the rider would fall off the bike due to the sudden backward force from the crank.

One of the purposes of this new model is to provide a pawl-type free-sliding clutch mechanism for a bicycle wheel hub, which can maintain a constant "gap" between the driven element and the driving mechanism of the wheel hub when the bicycle wheel slides forward or backward freely. ” or “relaxed state”.

The reason is that the pawl type free-sliding clutch mechanism of a bicycle hub provided by the present invention is accommodated in an accommodating space defined between the bicycle hub and the bicycle wheel axle. The pawl-type free-sliding clutch mechanism includes a driving part, a hub bushing, a plurality of pawls, a positioning part, a planetary gear assembly, a first resistance assembly, a first pinning assembly, a second resistance assembly and a Second pinning component. The driving member includes a sprocket and a drive sleeve, the sprocket includes a number of sprocket teeth protruding radially relative to the wheel shaft, and a wheel shaft receiving hole defined by the sprocket for receiving the bicycle wheel shaft , the drive sleeve extends axially outward from the sprocket. The drive sleeve includes a plurality of radially indented first chambers. The hub bushing includes a ring body, an outer ring surface and a ratchet surface, the outer ring surface is fixedly connected to the inner surface of the hub shell corresponding to the accommodation space, the ratchet surface contains a plurality of ratchet teeth, and most of them are located on The slope between the two adjacent ratchets. A part of each pawl is accommodated in each of the first chambers, and can move along with the driving part, and can engage with each of the ratchets after moving a proper distance. The positioning part is adjacent to each of the ratchet pawls, and is used for exerting a radial force on each of the ratchet pawls to break away from each of the ratchet teeth when each of the ratchet pawls is not subjected to external force. The planetary gear assembly includes a sun gear, an outer gear ring, a planetary gear carrier, at least one gear shaft and at least one planetary gear. The sun gear includes a gear portion, a convex plate extending outward from one side of the gear portion along the wheel shaft, and a first shaft hole passing through the gear portion and the convex plate; the outer diameter of the convex plate is larger than that of the gear portion It has an outer diameter and includes a plurality of radially concave first concave parts and a push part. When combined, the convex plate is adjacent to the driving sleeve, and the other part of each pawl is respectively accommodated in each The first recess is used to make each of the pawls move with the sun gear, and when the sun gear moves in a predetermined direction for a predetermined arc, each of the pushing parts will press against each of the ratchets. The pawl exerts an external thrust to make it mesh with each of the ratchet teeth of the hub bushing, and the first shaft hole is for the sun gear to rotatably pass through the wheel shaft. The outer gear ring includes a ring body, an outer ring surface and an inner tooth portion, and the outer gear ring is fixedly connected to the inner surface of the hub shell corresponding to the accommodation space through the outer ring surface. The planetary gear carrier includes a carrier body and a second shaft hole, and the planetary gear carrier is rotatably passed through the wheel shaft through the second shaft hole. The gear shaft is fixedly connected to the frame body of the planetary gear carrier. The planetary gear train is pivotally connected to the gear shaft, and meshes with the gear part of the sun gear and the inner tooth part of the outer ring gear respectively. The first resistance component is arranged between the sun gear and the axle, and is used to generate resistance to the rotation of the sun gear. The first pinning component is arranged between the outer gear ring and the sun gear, and is used for generating a pinning effect on the sun gear when the outer gear ring rotates in a first direction. The second resistance component is arranged between the planetary gear carrier and the wheel shaft, and is used to generate resistance to the rotation of the planetary gear carrier. The second pinning component is disposed between the planetary gear carrier and the second resistance component, and is used for pinning the planetary gear carrier when the planetary gear carrier rotates in a second direction opposite to the first direction effect.

Another feature of the present invention is that the first chamber of the ratchet-type free-sliding clutch mechanism of the bicycle hub includes a concave arc-shaped base, and a slope portion extending outward from the concave arc-shaped base. Each pawl includes a tubular root and a claw body extending outward from the tubular root. Each of the ratchets is accommodated in the concave arc-shaped base of the first chamber in a swingable manner between a first position and a second position by the tubular root, and the pawl body is arranged along the slope. When each of the pawls is located at the first position, the pawl body is disengaged from the ratchet teeth of the hub bushing. When each of the pawls is pushed by an external force and is located at the second position, the pawl body It engages with each of the ratchet teeth of the hub bushing.

Another feature of the present invention is that the locating member in the detent type free-sliding clutch mechanism of the aforementioned bicycle hub comprises a helical spring. The outer surface of each pawl is provided with a first groove, the outer surface of the drive sleeve is provided with a second groove corresponding to the first groove, and the coil spring is arranged between the first groove and the second groove. In the second groove.

Another feature of the present invention is that an open recess is arranged between the sun gear and the axle in the pawl-type free-sliding clutch mechanism of the aforementioned bicycle hub, and the first resistance component includes a wave spring, which is compressed The state is accommodated in the open alcove.

A further feature of the present model is that the first restraining assembly in the above-mentioned ratchet type free-sliding clutch mechanism of the bicycle hub includes a first restraining spring, and the first restraining spring has a helical body, a head end and a bent The first restraining spring starts from the head end and wraps the helical body on the convex plate of the sun gear in the way of winding along the first direction, and the tail end is embedded in the outer tooth on the ring.

Yet another feature of the present model is that the second resistance assembly in the aforementioned bicycle hub's pawl-type free-sliding clutch mechanism includes a resistance liner, and the resistance liner includes a ring body, an outer ring surface, and an inner ring surface. , a ring hole and a plurality of convex ribs and clips arranged on the inner ring surface. The resistance liner is used for accommodating the wheel shaft through the ring hole, coupled with the planetary gear carrier through the outer ring surface, and the ring body is fixed on the wheel shaft through the convex ribs and snap-in pieces.

Yet another feature of the present model is that the second restraining assembly in the ratchet type free-sliding clutch mechanism of the aforementioned bicycle hub includes a second restraining spring, and the second restraining spring comprises a helical body, a head end and a curved Folded ends. The second holding spring starts from the head end and wraps the helical body part on the resistance liner in a manner of winding along the second needle direction, and the tail end is embedded in the planetary gear carrier.

Below enumerate some preferred embodiments and cooperate with some drawings to disclose the present invention in more detail, wherein:

10: hub bushing

12: ring body

14: Outer ring surface

16: Ratchet

18: Bevel

20: Driver

22: sprocket

220: sprocket teeth

222: Axle receiving hole

24: Drive bushing

240: The first chamber

242: The first concave arc-shaped base

244: The first slope face

246: Second groove

248: concave hole

240': Second chamber

242': The second concave arc-shaped base

244': Second slope face

30: pawl

32: columnar root

34: claw body

342: concave hole

36: The first groove

40: Positioning piece

42: C-shaped spring body

44: Bending end

40': Positioner

400': open end

42': ring base

44': Elastic sheet body

40”: positioning piece (cylindrical magnetic block)

50: Planetary gear assembly

51: sun gear

510: gear department

512: Convex plate

514: The first shaft hole

516: the first recess

516': the second recess

518: Pushing Department

519: open alcove

52: External gear ring

520: outer annulus

522: Internal teeth

524: notch

526: convex rib

53:Planet carrier

530: Second shaft hole

532: concave hole

54: Planetary gear

55: Planetary gear shaft

60: First resistance component

62: wave spring

64: Gasket

70: First pinning component

72: spiral body

74: head end

76:Tail end

80:Second resistance component

800: ring body

802: Outer ring surface

804: inner ring surface

805: ring hole

806: convex rib

808: card connector

90:Second pinning component

92: spiral body

94: head end

96:Tail end

100: Pawl type free sliding clutch mechanism

900: hub

901: hub shell

902: hub bolts

903: Frame hook

904: Axle

905: Sleeve

Fig. 1 is a perspective view of a bicycle hub, which is equipped with a pawl-type free-sliding clutch mechanism of a preferred embodiment of the present invention; Fig. 2 is a sectional view along the direction of 2-2 in Fig. 1; Fig. 3 is a partial sectional perspective view of the bicycle hub shown in Fig. 1; Fig. 4 is a shaft in which the hub bushing of the embodiment shown in Fig. 1 is arranged behind the hub To sectional perspective view; Fig. 5 is the drive assembly of the embodiment shown in Fig. 1, the exploded perspective view of ratchet and locator; Fig. 6 is the combined perspective view of the drive assembly of the embodiment shown in Fig. 1, ratchet and locator; Fig. 7 is a cross-sectional view in the 7-7 direction of Fig. 2; Fig. 8 is the sun gear of the planetary gear assembly of the embodiment shown in Fig. 1, the outer ring gear, the planetary gear carrier, the planetary gear and the planetary gear shaft, the first resistance assembly, The exploded perspective view of the first pinning component, the second resistance component and the second pinning component; FIG. 9 is the planetary gear component of the embodiment shown in FIG. Combination perspective view; Figure 10 is an axial sectional view of the planetary gear assembly of the embodiment shown in Figure 1, the first resistance assembly, the first pinning assembly, the second resistance assembly, and the second pinning assembly and the hub shell; Figure 11 is The planetary carrier of the embodiment shown in Figure 1, the planetary gear, the planetary gear shaft, the second resistance component, the second pinning component and the sleeve and other components are opposite to the exploded perspective view of the direction shown in Figure 8; Figure 12 is the exploded perspective view of Figure 2 12-12 direction on the sectional view; Figure 13 is another embodiment of the new embodiment of the drive assembly, a perspective view of the combination of the pawl and the locator; and Figure 14 is another embodiment of the new drive assembly, the pawl and the locator Combine stereograms.

First of all, please refer to Fig. 1 to Fig. 3, what figure number 900 shows among them is a kind of bicycle rear wheel hub, and this wheel hub 900 has a hub shell 901, and this hub shell 901 is installed on two vehicle frames by means of two hub bolts 902 On the claw 903, as shown by the dotted line in Fig. 2 . Each of the wheel hub bolts 902 is screwed to the wheel shaft 904 respectively, and the wheel shaft 904 is connected by a plurality of sleeves 905, each of the vehicle frame drop claws 903 and a protective cover mechanism 906. The two main bearings 907 are respectively constrained on the two shoulders 908 of the axle 904 , so that the hub shell 901 can rotate around the axle 904 . The hub 900 further has an accommodating space 909 defined by the hub shell 901 and the hub 904 . A preferred embodiment 100 of the new pawl type free-sliding clutch mechanism is arranged in the accommodation space 909 . The pawl type free-sliding clutch mechanism 100 includes a hub bushing 10, a driving member 20, three pawls 30, a positioning member 40, a planetary gear assembly 50, a first resistance assembly 60, and a first pinning assembly 70 , a second resistance component 80 and a second restraining component 90 .

Please refer to FIG. 4 , the hub bushing 10 is arranged in the receiving space 909 . The hub bushing 10 includes a ring body 12, an outer ring surface 14, a plurality of ratchet teeth 16 and a slope 18 between two adjacent ratchet teeth 16, and the outer ring surface 14 is fixedly connected to the hub shell 901 corresponding to the On the inner surface of the accommodation space 909 , the hub shell 901 is integrally rotated.

Referring to FIGS. 5 to 7 , the driving member 20 includes a sprocket 22 and a drive sleeve 24 , the sprocket 22 has a number of sprocket teeth 220 protruding radially relative to the axle 904 , and one is driven by the sprocket 22 The defined axle receiving hole 222 is used for receiving the axle 904 . The drive sleeve 24 protrudes axially from the sprocket 22 towards the hub shell 901 . The driving sleeve 24 has three radially concave first chambers 240 arranged at equal intervals. The first chambers 240 include a first concave arc-shaped base 242 and a first concave arc-shaped base 242. The first slope portion 244 extending outward. In this embodiment, in order to allow the driving assembly 20 to be arranged on the left side or the right side of the hub shell 901, the driving sleeve 24 is provided with a second chamber 240' symmetrical to the first chamber 240. The pawl 30 includes a columnar base 32 and a claw body 34 extending from the columnar base 32 . The columnar base 32 is accommodated in the first concave arc-shaped base 242 of the first chamber 240, and the claw body 34 extends along the first slope portion 244, so that the pawl 30 can be positioned at Swing between a first position and a second position. The positioning member 40 includes a C-shaped spring body 42 and a bent end 44 . The outer surface of each pawl 30 is provided with a first concave groove 36, and the outer surface of the drive sleeve 24 is A second concave groove 246 corresponding to the first concave groove 36 is provided on the surface, and the positioning member 40 is bounded by the C-shaped spring body 42 in the first concave groove 36 and the second concave groove 246. The bent end 44 is embedded in a concave hole 248 formed on the outer surface of the driving sleeve 24 . Thereby, when each pawl 30 is located at the first position, it is pressed by the positioning member 40 to disengage the pawl body 34 from the ratchet 16 of the hub bushing 10. When the pawl 30 is pushed by an external force When the pressing force of the positioning member 40 is overcome, it will be in the second position so that the claw body 34 engages with the ratchet 16 of the hub bushing 10 .

Please refer to FIG. 8 to FIG. 12 , in this embodiment, the planetary gear assembly 50 includes a sun gear 51 , an outer ring gear 52 , a planetary gear carrier 53 , three planetary gears 54 and three planetary gear shafts 55 .

The sun gear 51 includes a gear portion 510 , a protrusion 512 axially extending outward from one side of the gear portion 510 , and a first shaft hole 514 passing through the gear portion 510 and the protrusion 512 . The outer diameter of the convex plate 512 is larger than the outer diameter of the gear part 510 and includes three radially inwardly concave first recesses 516, three second recesses 516' symmetrically arranged with each of the first recesses 516, and three The pushing portion 518 is located between each of the first recesses 516 and each of the second recesses 516'. When combined, the convex plate 512 is adjacent to the driving sleeve 24, and the other part of each pawl 30 is respectively accommodated in each of the first recesses 516, and the inner arc surface of the pawl body 34 is in contact with the drive sleeve 24. The pushing portion 518 is opposite, as shown in FIG. Pushed by the pushing portion 518 , it overcomes the pressing force of the positioning member 40 to move from the first position to the second position and engage with the ratchet 16 of the hub bushing 10 .

The outer gear ring 52 has an outer ring surface 520 , an inner gear portion 522 and a notch 524 . The outer ring surface 522 is provided with a plurality of convex ribs 526 distributed at intervals. When combined, the outer ring surface 520 is in contact with the inner surface of the housing space 909 corresponding to the hub shell 901 and each of the convex ribs 526 is embedded. The inner surface is provided with The concave groove 910 is shown in FIG. 4 , whereby the outer gear ring 52 will be combined with the hub shell 901 and rotate with the hub shell 901 .

The planetary gear carrier 53 is rotatably fixed to three planetary gears 54 through three gear shafts 55 arranged at equal intervals thereon. Each of the planetary gears 54 meshes with the gear portion 510 of the sun gear 51 and the internal gear portion 522 of the outer ring gear 52 respectively. This arrangement is the same as that of a general planetary gear set, and will not be described in detail here. . The planet gear carrier 53 also has a second shaft hole 530 for the planet gear carrier 53 to rotatably pass through the wheel shaft 904 .

Next, the first resistance component 60 and the first restraining component 70 will be explained. In this embodiment, an opening recess 519 is provided on one side of the sun gear 51 and a corresponding sleeve 905 defines an accommodating space for accommodating the first resistance component 60 . The first resistance component 60 includes a plurality of wave springs 62 and a washer 64 , so that the first resistance component 60 can generate certain resistance to the rotation of the sun gear 51 . The first restraining component 70 is a first restraining spring in this embodiment, of course, it can also be a combination of other elements. In this embodiment, the first restraining spring 70 has a helical body 72 , a head end 74 and a bent tail end 76 . When combined, the helical body 72 is sleeved on the ring surface of the convex plate 512 of the sun gear 51 in a clockwise direction from the head end 74, and the tail end 76 is embedded in the sun gear 51. Inside the notch 524 of the outer gear ring 52 . Thereby, when the outer gear ring 52 rotates clockwise, the first restraining spring 70 will tighten the sun gear 51, and when it rotates counterclockwise, the first restraining spring 70 will tighten relative to the sun gear 51. In a relaxed state. In this embodiment, when the hub shell 901 drives the wheel to rotate forward, it is clockwise as shown by the arrow in FIG. 3 . When the hub shell 901 drives the wheel to rotate backward, it is counterclockwise.

Next, the second resistance component 80 and the second restraining component 90 will be explained. In this embodiment, the second resistance component 80 is a resistance liner in this embodiment, and the resistance liner 80 includes a ring body 800, an outer ring surface 802, an inner ring surface 804, a ring hole 805 and the The inner ring The plurality of convex ribs 806 and snap-in pieces 808 on the 804 . When combined, the resistance pad 80 is used for accommodating the wheel shaft 904 through the ring hole 805, coupled with the planetary gear carrier 53 through the outer ring surface 802, and the The ring body 800 abuts on the sleeve 905 . In this way, the second resistance assembly 80 can generate certain resistance to the rotation of the planetary gear carrier 53 . The second restraining assembly 90 is a second restraining spring in this embodiment, and the second restraining spring 90 includes a helical body 92, a head end 94 and a bent tail end 96. When combined, the The head end 94 begins to wrap the helical body 92 on the outer ring surface 802 of the resistance pad 80 in a counterclockwise direction, and the tail end 96 is embedded in one of the planetary gear carriers 53 Inside the concave hole 532. Thereby, when the planetary gear carrier 53 rotates clockwise, the second pulling spring 90 will be in a relaxed state relative to the resistance pad 80 , and when the planetary gear carrier 53 rotates counterclockwise, the second The restraining spring 90 is tightened on the outer ring surface 802 of the resistance pad 80 , and then exerts a braking effect on the planetary gear carrier 53 .

Please refer to FIG. 13 , another embodiment of the present invention is a positioning member 40' comprising an annular base 42' and an elastic sheet-shaped body 44'. The annular base 42' is accommodated in the second concave arc-shaped base 242' of the second chamber 240' of the drive sleeve 24. The elastic sheet-shaped body 44' inserts its open end 400' into the concave hole 342 provided at the front end of the claw body 34 of the ratchet 30 along the second slope portion 244' of the second chamber 240'. . Thereby, when each pawl 30 is located at the first position, it is pressed by each positioning piece 40' to disengage from the ratchet 16 of the hub bushing 10. When each pawl 30 is pushed by an external force to overcome each When the pressing force of the positioning member 40 is applied, it will be located at the second position and engaged with the ratchet 16 of the hub bushing 10 .

Please refer to Fig. 14 again, the locating member 40 " of another embodiment of the present invention is a cylindrical magnetic block, and the cylindrical magnetic block 40 " has a part embedded in the first slope portion 244 , and from the Another part of the first slope portion 244 extends outward. The pawl 30 is made of magnetically conductive material. Thereby, when each of the pawls 30 is located at the first position, it is attracted by each of the cylindrical magnetic blocks 40 ″ and is attached to the hub bushing 10 Each of the ratchets 16 is disengaged. When each of the ratchets 30 is pushed by an external force to overcome the suction force of each of the cylindrical magnetic blocks 40", it will be located in the second position and will be in contact with each of the ratchets of the hub bushing 10. 16 engage.

The operation situation of this pawl type free sliding clutch mechanism 100 is described in detail below hereby:

1. When the bicycle is stationary or sliding forward, and the rider begins to step on the pedals forward, the chain (not shown in the figure) will drive the drive assembly 20 to rotate forward, viewed from the drive side, that is, as shown in the figure As shown in the arrow direction of 3, it is a clockwise rotation. When the drive assembly 20 rotates clockwise, since the sun gear 51 is braked by the first resistance assembly 60, each pawl 30 will move clockwise with the drive assembly 20 relative to the sun gear 51. Rotate, at this time, each of the pawls 30 will be displaced from the first position to the second position by the thrust of the push portion 518 and engage with the ratchet 16 of the hub bushing 10, so the drive assembly 20 engages with the hub shell 901 to drive the bicycle forward.

2. Next, it should be explained that the driving assembly 10 is not driven by the bicycle chain—that is, when the rider does not step on it, the pawl-type free-sliding clutch mechanism 100 can make the bicycle slide forward freely.

When the rider does not pedal and makes the bicycle slide forward freely, the hub bushing 10 will rotate forward relative to the drive assembly 20 and each of the pawls 30 along with the hub shell 901, that is, clockwise direction, as shown in the direction of the arrow in Figure 12. The inclined surface 18 between each of the toothed ratchets 16 of the hub bushing 10 will push each of the ratchets 30 back from the second position to the direction of the first position, and at the same time, the forward movement of the hub shell 901 will also The first pull spring 70 will tighten the sun gear 51 and push it forward, so that the inclined surface 18 will be away from each of the pawls 30, so that the hub housing 901 will be completely separated from the drive assembly 20, and each of the pawls will be separated. The claw 30 has also reached its limit of movement. In other words, the pawl type free-sliding clutch mechanism 100 will maintain the maximum relaxation state at this time, under this condition, the friction force between the first restraining spring 70 and the sun gear 51 will be pushed forward by the hub shell 901 The force of rotation is overcome, and can slide relative to the sun gear 51, and the The second holding spring 90 is maintained in a relaxed state, and does not brake the planetary gear carrier 53 . Thus, the bicycle can slide forward freely.

3. Finally, it should be explained that the driving assembly 10 is not driven by the bicycle chain—that is, when the rider does not step on the pedal, the pawl-type free-sliding clutch mechanism 100 can make the bicycle freely slide backwards.

When the rider does not step on the bicycle and slides the bicycle freely backwards, the hub shell 901 rotates counterclockwise as seen from the aforementioned direction, and the outer gear ring 52 is carried by the hub shell 901. Also rotate counterclockwise, at this moment, the second pulling spring 90 will be tightened on the resistance lining 80, and the planetary gear carrier 53 will be braked by the resistance lining 80, so that each of the planetary gears 54 can be As the outer gear ring 52 rotates counterclockwise. Simultaneously, this first restraining spring 70 is then in loose state and no longer constrains this sun gear 51, so this sun gear 51 will overcome the resistance of this first resistance assembly 60 and rotate clockwise to make each of these ratchets 30 from the first resistance assembly 60 to rotate clockwise. The second position moves toward the direction of the first position, and no longer engages with the ratchet 16 of the hub bushing 10 . At this time, if the hub housing 901 continues to rotate backwards, the frictional force exerted by the resistance pad 80 on the planetary gear carrier 53 will be overcome, so the planetary gear carrier 53 will rotate backwards to allow the sun gear 51 to remain at Stationary state. In other words, the pawl type free-running clutch mechanism 100 will also maintain the maximum relaxation state, so that the bicycle can freely slide backwards.

In addition, it must be mentioned that when the bicycle is gliding backwards, since the pawl type free gliding clutch mechanism 100 is maintained at the maximum relaxation state, the power of the rider stepping forward must be sufficient to overcome the resistance lining. The resistance applied by the pad 80 to the planet carrier 53 . Otherwise, the resistance will still cause the sun gear 51 to rotate forward relative to the planet gear carrier 53 , so that each pawl 30 is disengaged from the hub bushing 10 . In this way, accidental engagement of the hub shell 901 with the drive assembly 20 can be prevented.

100: Pawl type free sliding clutch mechanism

900: hub

901: hub shell

902: hub bolts

903: Frame hook

904: Axle

905: Sleeve

906: Protective cover mechanism

907: main bearing

908: shoulder

909: storage space

Claims (14)

A pawl-type free-sliding clutch mechanism for a bicycle hub is accommodated in an accommodating space defined by a bicycle hub shell and a bicycle wheel shaft. The pawl-type free-slide clutch mechanism includes: a driving part, including a A sprocket and a drive sleeve, the sprocket includes a number of sprocket teeth protruding radially relative to the wheel shaft, a wheel shaft receiving hole defined by the sprocket for receiving the bicycle wheel shaft, the drive sleeve Extending axially outward from the wheel, the drive sleeve includes a plurality of radially indented first chambers; the hub bushing includes an annulus, an outer annular surface and a ratchet surface, the outer annular surface is in contact with The inner surface of the hub shell corresponding to the accommodating space is fixed, and the ratchet surface contains a plurality of ratchets, and a slope between two adjacent ratchets; a plurality of ratchets, one part of each ratchet is respectively It is housed in the first chamber, and can move along with the driving member, and engages with each ratchet after moving an appropriate distance; at least one positioning member is adjacent to each ratchet, for When the pawls are not subjected to external force, a radial force is applied to each of the pawls to break away from each of the ratchet teeth; a planetary gear assembly includes: a sun gear, including a gear part, and a side shaft from the gear part A protruding disc extending outward and a first shaft hole passing through the gear part and the protruding disc; the outer diameter of the protruding disc is larger than the outer diameter of the gear part and includes a plurality of radially inwardly concave first recesses and a top Push part, when combined, the convex plate is adjacent to the drive sleeve, and the other part of each pawl is respectively accommodated in each of the first recesses, so that each of the pawls can follow the sun gear move, and when the sun gear moves in a predetermined direction for a predetermined arc, each of the pushing parts will exert an external thrust on each of the pawls to engage with each of the pawls, and the first shaft hole is for the sun gear is rotatably mounted on the axle; An outer gear ring, including a ring body, an outer ring surface and an inner gear part, the outer gear ring is fixedly connected to the inner surface of the hub shell corresponding to the accommodation space through the outer ring surface; a planetary gear carrier, Contains a frame body and a second shaft hole, the planetary gear carrier is rotatably passed through the wheel shaft through the second shaft hole; at least one gear shaft, the gear shaft is fixed on the frame body of the planetary gear carrier; At least one planetary gear, the planetary gear train is pivotally connected to the gear shaft, and respectively engages with the gear part of the sun gear and the inner tooth part of the outer ring gear; a first resistance component is arranged on the sun gear Between the gear and the axle, it is used to generate resistance to the rotation of the sun gear; a first restraining component is arranged between the outer gear ring and the sun gear, and is used to rotate the outer gear ring in a first direction When, the sun gear is pinned; a second resistance component is arranged between the planetary gear carrier and the axle to generate resistance to the rotation of the planetary gear carrier; and a second pinning component is arranged on the Between the planetary gear carrier and the second resistance component, when the planetary gear carrier rotates in a second direction opposite to the first direction, the planetary gear carrier is restrained. The pawl-type free-sliding clutch mechanism for a bicycle hub as described in claim 1, wherein the first chamber includes a concave arc-shaped base, and a slope portion extending outward from the concave arc-shaped base; the pawl includes a tubular root, and a pawl extending outward from the tubular root, the pawl is accommodated in the recess of the first chamber in a swingable manner between a first position and a second position by the tubular root In the arc-shaped base, when the pawl is at the first position, it is disengaged from the ratchet of the hub bushing, and when the pawl is pushed by external force and is at the second position, it is connected with the hub bushing The ratchet gnaws. The pawl type free-sliding clutch mechanism of the bicycle hub as described in claim 1, which The positioning part includes a coil spring; the outer surface of each pawl is provided with a first groove, and the outer surface of the drive sleeve is provided with a second groove corresponding to the first groove, and the coil spring is arranged in the first groove and the second groove. The pawl-type free-sliding clutch mechanism of bicycle hub as described in claim 1, wherein an open recess is arranged between the sun gear and the wheel shaft, the first resistance component includes a wave spring, and the wave spring is compressed The state is accommodated in the open alcove. The pawl-type free-sliding clutch mechanism for a bicycle hub as described in claim 1, wherein the first restraining assembly includes a first restraining spring, and the first restraining spring has a helical body, a head end and a bent shape At the tail end, the first restraining spring system starts from the head end and wraps the helical body on the convex plate of the sun gear in the way of winding along the first direction, and the tail end is embedded in the outer gear ring superior. The pawl-type free-sliding clutch mechanism of the bicycle hub as described in claim 5, wherein the first restraining component further includes a notch arranged on the outer gear ring for the tail of the first restraining spring end scarf. The pawl-type free-sliding clutch mechanism for a bicycle hub as described in claim 1, wherein the outer ring surface of the outer gear ring has a plurality of convex ribs distributed at equal intervals, and each of the convex ribs is embedded on the surface of the accommodating space . The pawl-type free-sliding clutch mechanism for a bicycle hub as described in claim 1, wherein the planetary gear assembly includes three gear shafts and three planetary gears, and each of the gear shafts is arranged on the planetary gear carrier at equal intervals, Each of the planetary gear trains is pivotally connected to each of the gear shafts. The pawl-type free-sliding clutch mechanism for bicycle hubs as described in claim 1, wherein the second resistance component includes a resistance liner, and the resistance liner includes a ring body, an outer ring surface, and a The inner ring surface, a ring hole, and a plurality of ribs and snap-in pieces arranged on the inner ring surface, the resistance pad is used for accommodating the wheel shaft through the ring hole, and coupled with the planetary gear carrier through the outer ring surface , and the ring body is fixed on the wheel shaft by each of the convex ribs and snap-in pieces. The pawl-type free-sliding clutch mechanism of bicycle hub as described in claim 9, wherein the second restraining assembly includes a second restraining spring, and the second restraining spring includes a helical body, a head end and a bent At the tail end, the second holding spring system starts from the head end and wraps the helical body on the resistance liner in a manner of winding along the second needle direction, and the tail end is embedded in the planetary gear carrier superior. The pawl-type free-sliding clutch mechanism of the bicycle hub as described in claim 10, wherein the second restraining assembly further includes a concave hole arranged on the planetary gear carrier for the tail of the second restraining spring end scarf. The pawl-type free-sliding clutch mechanism for a bicycle hub as described in claim 1, wherein the positioning member includes an annular base and an elastic sheet-shaped body, and the driving sleeve further includes a first chamber that is symmetrical to the first chamber Two chambers, the second chamber includes a second concave arc-shaped base and a second slope portion extending outward from the concave arc-shaped base, and a concave hole is provided at the front end of the claw body of the ratchet; the positioning member The annular base part is accommodated in the second concave arc-shaped base part, and the elastic sheet-shaped body part extends along the second slope part and inserts its open end into the concave hole of the pawl body. The pawl-type free-sliding clutch mechanism of the bicycle hub according to claim 2, wherein the positioning member includes a cylindrical magnetic block, and the cylindrical magnetic block is embedded in the first slope portion of the first chamber , when the pawl is at the first position, the pawl body is attracted by the cylindrical magnet and disengages from the ratchet of the hub bushing, when the pawl is pushed by external force and is at the second position , the claw body will overcome the attraction of the cylindrical magnet and mesh with the ratchet of the hub bushing. According to claim 13, the ratchet type free-sliding clutch mechanism of the bicycle hub, wherein the cylindrical magnetic block includes a part embedded in the slope part, and another part protruding outward from the slope part.

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