CN200942857Y - Bicycle hub transmission chain wheel structure - Google Patents

Abstract

The utility model is a transmission chain wheel structure for bicycle hubs, which comprises a hub, a ratchet wheel, a chain wheel and a keying piece, wherein a mandrel is provided in the center of the hub, and a chain wheel seat is provided on side edge of the hub; a plurality of positioning ribs are arranged in a circular from, and a male thread section is formed at the outer flank of the chain wheel seat; a through hole provided with a positioning groove is formed in the center of the ratchet wheel, and ratchets are formed on the outer margin of the ratchet wheel; the pin roller can be positioned in groove of the ratchets so that the ratchet wheel can be driven one-way by the chain wheel by taking advantage of being locked by the pin roller; a holding hole is provided in the center of the chain wheel, with a retaining margin provided at outer flank, and the inner side is an opened mouth; a blocking trough is also provided, and a retaining piece can be inserted and be blocked into the blocking trough to seal the opened mouth; outer margin of the chain wheel is provided with coupled teeth so that the drive tooth disc provided on the pedal pole can be connected by the chain; a female thread hole is provided in the center of the keying piece. With help of such a structure, the transmission chain wheel structure for bicycle hubs obtains an excellent strength, with smooth motions.

Description

Bicycle hub driving chain wheel structure

Technical field

The utility model relates to a kind of " bicycle hub driving chain wheel structure ", You Zhiqi is the wheel flower hub place that is installed in bicycle, when trampling for use, can drive wheel, and when not trampling, then can separate automatically, and then rotate to make the unexpected foot-driven lever that when dallying, drives of wheel and flower hub.

Background technology

At present general common bicycle hub driving chain wheel structure, as Fig. 8 and shown in Figure 9, it includes: a chain pulley seat 10, one unidirectional lining 20, one sprocket wheel 30 and a lock knot part 40, wherein chain pulley seat 10 can be for being incorporated on the colored hub, rotate to drive colored hub, and extend in its outside casing-joining part 11, on the casing-joining part 11 and have an external thread section 12, so plastic materials such as unidirectional lining 20 polyethylenes mold, be equipped with most caulking grooves 21 on the outer peripheral edges, be equipped with supporting piece 22 in the caulking groove 21, and all push against a roller 23 toward side skew, sprocket wheel 30 central authorities are formed with ratchet slot 31, and the outside has retaining edge 32, and the inboard then is an open ports 33, and be to be formed with interlock tooth 34 on the outer peripheral edges of this sprocket wheel 30, be located on transmission fluted disc on the foot-driven lever can be connected with chain to allow, lock knot part 40 central authorities are provided with internal thread hole 41, and the outside then forms the retaining wall 42 of big footpath scalariform.

During its combination, as shown in Figure 8, unidirectional lining 20 is to be put into by open ports 33, and be subjected to keeping off edge 32 blocks, and can be placed in the ratchet slot 31 of sprocket wheel 30,30 on sprocket wheel is sheathed on together with unidirectional lining 20 on the casing-joining part 11 of chain pulley seat 10, and between the opposite flank of sprocket wheel 30 and chain pulley seat 10, be provided with ball 13, to allow sprocket wheel 30 unidirectional rotation thereon,, be again lock knot part 40 to be utilized internal thread hole 41 and be screwed on the external thread section 12 of chain pulley seat 10 again when sprocket wheel 30 is sheathed when going up, and also be provided with ball 13 in retaining wall 42 and 30 on sprocket wheel, and chain pulley seat 10 is incorporated on the colored hub, by this, promptly finish combination.

By use by said structure, when driving cog dribbling movable sprocket 30 is just changeing, can engage mutually with the roller 23 of unidirectional lining 20 and sprocket wheel 30 ratchet slots 31 interior ratchets, allow sprocket wheel 30 be able to the moving induction sprocket seat 10 of contract and push-jump colored hub and its wheel, and bicycle can be advanced forward, anti-, if use not pushes pedals, the transmission fluted disc is not rotated, or meet the descending bicycle when gliding fast, roller 23 promptly is subjected to the pushing and pressing of supporting piece 22, and returns back to original position, and make roller 23 not with ratchet slot 31 in ratchet fasten, by be used for reaching colored hub and 30 on sprocket wheel trample in conjunction with and do not trample the state exchange that separates automatically.

So, aforesaid existing structure still has following problem points in practical application: need have caulking groove 21 on its unidirectional lining 20 and supply roller 23 ccontaining, and be combined with supporting piece 22, just can reach purpose for sprocket wheel 30 clutches conversion, but also can have structure designs such as caulking groove 21 and supporting piece 22 because of need, and allow the structure of this unidirectional lining 20 understand relative complex, when making, just only can utilize materials such as plastics to mold, make that this unidirectional lining 20 has intensity, hardness is low excessively, excessive because of the use stampede power easily when driving, too quickly, and have the facts of damaging of breaking to take place; Two its be to form ratchet slot 31 in sprocket wheel 30 inside, so this sprocket wheel 30 not only forming work be difficult for, more be easy to generate the phenomenon that roller 23 is interfered because ratchet slot 31 is located at sprocket wheel 30 inside, and allow this sprocket wheel 30 do not have relatively can smooth and easy start characteristics; Three its driving chain wheel structures only can be installed in colored hub right side, and it is bigger to work as the left foot strength of using, or custom is when utilizing the action that left foot implements to trample in advance, and this driving chain wheel structure promptly can't be changed on the left side that is attached to colored hub relatively, so, not only applicability is lower for it, more because can't be left and right all be suitable for, and allow this structure when making, need produce different members relatively, to cater to different uses, invisible will be improved productive costs, and stock's pressure; Four its chain pulley seats 10 and 30 on sprocket wheel and sprocket wheel 30 and 40 of parts of lock knot all need be provided with ball 13, could allow sprocket wheel 30 rotate, so its number of assembling steps is difficult, loaded down with trivial details, productive costs is also high.

The utility model people is promptly because the disappearance of above-mentioned existing bicycle hub driving chain wheel structure, is think and the idea of creation, satisfies with for many years experience and designed, and through inquiring into and study Sample testing in many ways, and repeatedly revises improvement, is to release the utility model.

The technical matters point that desire solves:

Existing bicycle hub driving chain wheel structure, its unidirectional lining intensity is low, produces the phenomenon of breaking when being easy to use, and the chain wheel shaping is difficult, and assembling is difficulty also, and only can monolaterally be suitable for, and this is the technical matters point that desire solves.

The utility model content

The utility model purpose provides a kind of bicycle hub driving chain wheel structure, it is by a kind of bicycle hub driving chain wheel structure, it is by a flower hub, one ratchet, one sprocket wheel and a lock knot part are formed, flower hub central authorities have an axle, this axle is fixing for combining with vehicle frame, colored hub can freely be rotated on axle, and can utilize the setting of flower hub, and it is fixing to combine with wheel, be to be provided with chain pulley seat on the side of colored hub again, on the chain pulley seat and be equipped with most positioning ribs, and be formed with external thread section in its outside, and be to be formed with the interlock tooth on the outer peripheral edges of sprocket wheel, be located on transmission fluted disc on the foot-driven lever can be connected with chain to allow, lock knot part central authorities are provided with internal thread hole, it is characterized in that:

Ratchet central authorities are formed with the perforation of tool positioning groove, then be formed with ratchet on the outer peripheral edges, roller can be positioned in the teeth groove of ratchet, allow ratchet can utilize the engaging of roller, and by the unidirectional drive of sprocket wheel, sprocket wheel central authorities are formed with containing hole, the outside has the retaining edge, and the inboard is an open ports then, and is provided with Yi Kagou, this Ka Gou can embed the card knot for a catch, so that open ports is sealed;

By by said structure, roller is the teeth groove that is positioned over the ratchet ratchet, put into by open ports together with ratchet again, and kept off the edge block, and be placed in the containing hole of sprocket wheel, and after treating that ratchet receives into, be again catch to be embedded to block the Ka Gou that ties in sprocket wheel, by with open ports sealing, and ratchet can't be isolated again, sprocket wheel is to be sheathed on the chain pulley seat of colored hub with ratchet, and with positioning rib and positioning groove inlay card mutually, and the pass that can reach the transmission that is connected is, again when sprocket wheel is sheathed when going up, is can again lock knot part be utilized internal thread hole and be screwed on the external thread section of chain pulley seat.Effect against existing technologies:

One, the utility model provides bicycle hub driving chain wheel structure, only need be provided with ratchet and positioning groove on its ratchet, can reach clutch conversion and the purpose that links transmission, so, it not only can be because of simple structure, when making, can mold, more, not be easy to generate the facts that ratchet breaks and damages when driving and have because metal strength, hardness are all higher with materials such as metals.

Two, the utility model provides bicycle hub driving chain wheel structure, and the containing hole of its sprocket wheel is to be an even curface, so forming work is easier to, reaches the interference that can not cause roller, is smooth and easy relatively when start.

Three, the utility model provides bicycle hub driving chain wheel structure, and its sprocket wheel can be installed in together with ratchet on the left side or right side of colored hub, so applicability is preferable, and in order to do when manufacturing, can relative cost-cutting and warehousing pressure.

Four, the utility model provides bicycle hub driving chain wheel structure, need not be provided with ball between its chain pulley seat and sprocket wheel and between sprocket wheel and lock knot part, start smoothly, so its number of assembling steps is easier to, simplifies, productive costs is low relatively.

Understand and understanding for making can have further the purpose of this utility model, feature and effect, below please cooperate [brief description of drawingsfig] to enumerate embodiment now, detailed description is as the back:

Description of drawings

Fig. 1: be three-dimensional combination figure of the present utility model;

Fig. 2: be three-dimensional exploded view of the present utility model;

Fig. 3: be combination section of the present utility model;

Fig. 4: be the utility model sprocket rotation and the view that drives the flower hub;

Fig. 5: be the view that the utility model sprocket wheel stops operating colored hub is dallied;

Fig. 6: be the constitution diagram under the dismounting of the utility model sprocket wheel;

Fig. 7: be the constitution diagram that the utility model sprocket wheel is installed in colored hub left side;

Fig. 8: the three-dimensional combination figure that is prior art;

Fig. 9: the three-dimensional exploded view that is prior art.

[primary clustering nomenclature]

Existing part:

Chain pulley seat----10 casing-joining parts----11

External thread section--12 balls-----13

Unidirectional lining--20 caulking grooves-----21

Supporting piece----22 rollers-----23

Sprocket wheel----30 ratchet slots----31

Retaining edge----32 open ports----33

Interlock tooth----34

Lock knot part----40 internal thread hole---41

Retaining wall-----42

The utility model part:

Flower hub----50 axles-----51

Chain pulley seat----52 positioning ribs----53

External thread section---54

Ratchet----60 perforations-----61

Positioning groove----62 ratchets-----63

Roller-----64

Sprocket wheel----70 containing holes----71

Retaining edge----72 open ports----73

Ka Gou----74 interlock teeth----75

Catch-----76

Lock knot part----80 internal thread holes-

The specific embodiment

Please earlier by Fig. 1 three-dimensional combination figure of the present utility model, and see it shown in Fig. 2 three-dimensional exploded view of the present utility model, it is by a flower hub 50, one ratchet 60, one sprocket wheel 70 and a lock knot part 80 are formed, wherein, flower hub 50 central authorities have an axle 51, this axle 51 is fixing for combining with vehicle frame, colored hub 50 can freely be rotated on axle 51, and can utilize the setting of flower hub 50, and it is fixing to combine with wheel, spend again on the side of hub 50 is that to be provided with chain pulley seat 52 these chain pulley seats 52 are the left sides that can be located at colored hub 50, the modes of selecting such as right side or dual-side all are provided with are, on the chain pulley seat 52 and be equipped with most positioning ribs 53, and be formed with external thread section 54 in its outside, ratchet 60 central authorities are formed with the perforation 61 of tool positioning groove 62, then be formed with ratchet 63 on the outer peripheral edges, roller 64 can be positioned in the teeth groove of ratchet 63, to allow ratchet 60 can utilize the engaging of roller 64, and by sprocket wheel 70 unidirectional drives, sprocket wheel 70 central authorities are formed with containing hole 71, the outside has retaining edge 72, the inboard then is an open ports 73, and be provided with one the card ditch 74, this card ditch 74 is to embed the card knot for a catch 76, by with open ports 73 sealing, be to be formed with interlock tooth 75 on the outer peripheral edges of sprocket wheel 70, be located on transmission fluted disc on the foot-driven lever can be connected with chain that lock knot part 80 central authorities are provided with internal thread hole 81 again to allow.

During its combination, again please by Fig. 1 arrange in pairs or groups sight shown in Figure 3 it, roller 64 is the teeth groove that are positioned over ratchet 60 ratchets 63, put into by open ports 73 together with ratchet 60 again, and kept off edge 72 blocks, and be placed in the containing hole 71 of sprocket wheel 70, and after treating that ratchet 60 receives into, be again catch 76 to be embedded to block the card ditch of tying in sprocket wheel 70 74, by with open ports 73 sealing, and ratchet 60 can't be isolated again, sprocket wheel 70 is to be sheathed on the chain pulley seat 52 of colored hub 50 with ratchet 60, and with positioning rib 53 and positioning groove 62 inlay card mutually, and the pass that can reach the transmission that is connected is, again when sprocket wheel 70 is sheathed when going up, is can again lock knot part 80 be utilized internal thread hole 81 and be screwed on the external thread section 54 of chain pulley seat 52, by this, promptly finish combination.

When it uses, continuous please by sight shown in Figure 4 it, when driving cog dribbling movable sprocket 70 is just changeing, roller 64 is the guiding that can be subjected to ratchet 63 profiles of tooth, and it is approaching toward the tooth top place of ratchet 63, and be sticked between the peritreme of ratchet 63 and containing hole 71, allow sprocket wheel 70 can utilize the strength of this engaging, rotate and drive ratchet 60, and when ratchet 60 rotates, promptly can be by the pass of inlay card interlock being mutually by 53 of positioning groove 62 and positioning ribs, and the moving induction sprocket seat 52 of contract promotes flower hubs 50 and its wheel, and bicycle can be advanced forward; Anti-, if use not pushes pedals, the transmission fluted disc is not rotated, or meet the descending bicycle when gliding fast, roller 64 promptly can continue rotating because of ratchet 60, and can actv. toward the tooth root place of ratchet 63 near replying, and make roller 64 not with the peritreme of containing hole 71 fasten continuous please by sight shown in Figure 5 it, by this, be to reach the effect of not trampling automatic separation, and then rotate to make wheel and flower hub 50 unexpected sprocket wheel 70, transmission fluted disc and the foot-driven levers of when dallying, driving.

Continuous please by Fig. 6 arrange in pairs or groups sight shown in Figure 7 it, because chain pulley seat 52 and 70 on sprocket wheel and sprocket wheel 70 and 80 of parts of lock knot need not be provided with ball, start smoothly, and ratchet 60 medial and lateral all are closed, and can't be separated with sprocket wheel 70 again, cause the left foot strength of working as use bigger, or custom is when utilizing the action that left foot implements to trample in advance, be lock knot part 80 can be screwed out, to make sprocket wheel 70 can unload together with ratchet 60, taking advantage of a situation is installed on the chain pulley seat 52 in colored hub 50 left sides again, by this, can cater to the different demands of using.

Structure by above-mentioned specific embodiment, can obtain following benefit: only need be provided with ratchet 63 and positioning groove 62 on its ratchet 60, can reach clutch conversion and the purpose that links transmission, so, it not only can be because of simple structure, when making, can mold, more, not be easy to generate the facts that ratchet 60 breaks and damages when driving and have because metal strength, hardness are all higher with materials such as metals; The containing hole 71 of two its sprocket wheels 70 is to be an even curface, so forming work is easier to, reaches the interference that can not cause roller 64, is smooth and easy relatively when start; Three its sprocket wheels 70 can be installed in together with ratchet 60 on the left side or right side of colored hub 50, so applicability is preferable, in order to do when manufacturing, energy is cost-cutting and warehousing pressure relatively; Four its chain pulley seats 52 and 70 on sprocket wheel and sprocket wheel 70 and 80 of parts of lock knot need not be provided with ball, start smoothly, so its number of assembling steps is easier to, simplifies, productive costs is low relatively.

In sum, the utility model has reached breakthrough structure design really, and has the author content of improvement, can reach simultaneously usability and progressive on the industry again, and the utility model does not see any publication, also has a novelty, when the regulation that meets the relevant law of patent law.

The above only is a preferred embodiment of the present utility model, when can not with the scope implemented of qualification the utility model; Promptly the equalization of being done according to the utility model claim generally changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims (2)

1, a kind of bicycle hub driving chain wheel structure, it is by a flower hub, one ratchet, one sprocket wheel and a lock knot part are formed, flower hub central authorities have an axle, this axle is fixing for combining with vehicle frame, colored hub can freely be rotated on axle, and can utilize the setting of flower hub, and it is fixing to combine with wheel, spending on the side of hub again is to be provided with chain pulley seat, on the chain pulley seat and be equipped with most positioning ribs, and is formed with external thread section in its outside, be to be formed with the interlock tooth on the outer peripheral edges of sprocket wheel, be located on transmission fluted disc on the foot-driven lever can be connected with chain to allow, lock knot part central authorities are provided with internal thread hole, it is characterized in that:

Described these ratchet central authorities are formed with the perforation of tool positioning groove, then be formed with ratchet on the outer peripheral edges, roller can be positioned in the teeth groove of ratchet, allow ratchet can utilize the engaging of roller, and by the unidirectional drive of sprocket wheel, sprocket wheel central authorities are formed with containing hole, the outside has the retaining edge, and the inboard is an open ports then, and is provided with Yi Kagou, this Ka Gou embeds the card knot for a catch, so that open ports is sealed.

2, bicycle hub driving chain wheel structure as claimed in claim 1 is characterized in that, described this chain pulley seat is left side, right side or a dual-side of being located at colored hub.

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