CN201280204Y - Bicycle crank firm joint device - Google Patents
Bicycle crank firm joint device Download PDFInfo
- Publication number
- CN201280204Y CN201280204Y CNU2008201370307U CN200820137030U CN201280204Y CN 201280204 Y CN201280204 Y CN 201280204Y CN U2008201370307 U CNU2008201370307 U CN U2008201370307U CN 200820137030 U CN200820137030 U CN 200820137030U CN 201280204 Y CN201280204 Y CN 201280204Y
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- CN
- China
- Prior art keywords
- crank
- joint device
- bicycle crank
- tapering
- rotating shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a fixed connection device for the crank of a bicycle, in particular to a fixed connection device for the crank of a bicycle occluded by utilizing a groove at the junction of a rotating shaft and the crank and locked by a bolt. The fixed connection device for the crank of the bicycle comprises a gear-shaped combined part respectively arranged on the outer peripheral surfaces at two ends of the rotating shaft, a plurality of gear-shaped gear parts arranged axially on the periphery of the rotating shaft, and a recess arranged between the two adjacent gear parts; a receiving part which can oppositely penetrate and be combined with the gear-shaped combined part is arranged at one end of the crank, and grooves oppositely combined with the gear parts are formed on the inner wall of the crank; a bulge is formed between the two grooves and is oppositely combined with the recess; a locking hole is respectively formed on the end surfaces at two ends of the rotating shaft; and a bolt arranged on one side opposite to the receiving part penetrates the receiving part, is locked in the locking hole, and is close to the gear parts and the grooves.
Description
Technical field
The utility model relates to a kind of accessory structure of bicycle, particularly about the bicycle crank firm joint device of engaged between a kind of groove that utilizes rotating shaft and crank junction and nut locking.
Background technology
Known bicycle crank firm joint device, be to combine with a rotating shaft by the crank that an end has a C type opening acceptance division, described rotating shaft is placed through among the described acceptance division, and again C type opening is carried out urgent means (screw lock, pressurization and slotting fastening ... etc.), C type opening generation type transformation is compeled described rotating shaft behind the countershaft application of stress, make described crank turn described rotating shaft, again by a large fluted disc is set on the described crank, described large fluted disc is coaxial with described acceptance division, and described large fluted disc is according at least one fixed orifice is arranged, can rely on screw to pass described fixed orifice locking on described crank, described rotating shaft is passed described large fluted disc and is placed through acceptance division again, therefore, 2 fixing, rotates described crank and just driven described large fluted disc simultaneously; But such design is not good at the binding force of described crank and described rotating shaft, because be to use the mode of packing, so have only part joint portion and described rotating shaft closed contact, and be to utilize the urgent means that add, just can be weakened in the back urgent strength of using certain hour, and need utilize screw to fix described large fluted disc, just can drive smoothly, not only to increase installation elements, and must be more one erection procedures, not only comparatively complexity and durability degree are not good.
Summary of the invention
The purpose of this utility model is: a bicycle crank firm joint device is provided, solves comparatively complexity and the not good problem of durability degree that existing structure exists.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of bicycle crank firm joint device, described bicycle crank firm joint device comprises:
One rotating shaft, outside face has a gear shape joint portion around the described rotating shaft two ends, has the tooth portion that the plural number that is gear-like is arranged around axially around the described joint portion, has a recess between described tooth portion and the described tooth portion;
At least one crank, described crank one end has one can the relative acceptance division that places combination with described gear shape joint portion, described acceptance division inwall has the groove with the relative combination of described tooth portion, has a protuberance between described groove and the described groove, the relative combination of described recess of described protuberance and described joint portion.
Based on technique scheme, more comprise a large fluted disc, described large fluted disc center also has the structure identical with described receiving portion, can stably be installed in described joint portion and with the rotating shaft coaxial rotation.Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be: an end at the junction surface of rotating shaft is gear-like, and the tooth portion of described gear is towards axial formation one tapering, one end inwall of the receiving portion of described crank has plural protuberance and groove, can relative combination with described joint portion; In addition, the utility model provides a nut to wear and is locked in described receiving portion, and the lockhole of locking on described rotating shaft one end face, urgent described joint portion and described acceptance division simultaneously.
Description of drawings
Fig. 1 is the utility model three-dimensional exploded view;
Fig. 2 is the utility model combination appearance figure;
Fig. 3 is the utility model rotating shaft lateral plan;
Fig. 4 is the utility model rotating shaft front elevation;
Fig. 5 is the 5-5 section-drawing of Fig. 3;
Fig. 6 is another embodiment three-dimensional exploded view of the utility model;
Fig. 7 is another embodiment combination appearance figure of the utility model.
Description of reference numerals: 10-rotating shaft; The 11-joint portion; 111-tooth portion; The 112-recess; 113-the inner; The 114-outer end; The 12-end face; The 121-lockhole; The 20-crank; The 21-acceptance division; The 211-groove; The 212-protuberance; The 22-nut; The 221-enclosing cover; The 30-large fluted disc; The 31-throwing part; The 311-tooth is protruding; 40-fluted disc seat; 41-wears portion; The 411-gear piece; The 42-locking hole; The 43-screw; The 44-nut; 50-has fluted disc now; The 51-perforation; The 52-lock hole.
The specific embodiment
For ease of explanation the utility model represented central idea in foregoing invention content one hurdle, express with specific embodiment now.Various different objects are to describe in fitting at ratio, size, deflection or the displacement of explanation among the embodiment, but not are drawn in the ratio of actual components, close chat earlier bright.And in the following description, similar elements is to represent with identical numbering.
Please refer to Fig. 1 to shown in Figure 5, a kind of bicycle crank firm joint device, described bicycle crank firm joint device comprises a rotating shaft 10, outside face has a gear shape joint portion 11 around described rotating shaft 10 two ends, have the tooth portion 111 that the plural number that is gear-like is arranged around axially around the described joint portion 11, have a recess 112 between described tooth portion 111 and the described tooth portion 111; At least one crank 20, described crank 20 1 ends have one can with the described gear shape joint portion 11 relative acceptance divisions 21 that place combination, described acceptance division 21 inwalls have the groove 211 with the 111 relative combinations of described tooth portion, has a protuberance 212 between described groove 211 and the described groove 211, the described recess 112 relative combinations of described protuberance 212 and described joint portion 11; The described tooth portion 111 of described joint portion 11 axially from inside to outside bundle receive and form an axial tapering variation; The tapering of the described groove 211 of described acceptance division 21 is relative with the tapering of described tooth portion 111; Described joint portion 11 is placed through described acceptance division 21, described tooth portion 111 and described groove 211 relative tapering combinations; Described bicycle crank firm joint device more comprises a large fluted disc 30, described large fluted disc 30 centres have throwing part 31, described throwing part 31 inwalls have that plural tooth is protruding 311, and described tooth protruding 311 has tapering, and its tapering is identical with protuberance 212 taperings of described acceptance division 21; The joint portion 11 of described rotating shaft 10 is placed through the throwing part 31 of described large fluted disc 30, and described tooth protruding 311 is combined closely with the recess 112 of described joint portion 11, and the described joint portion 11 of described rotating shaft 10 can combine with the described acceptance division 21 of described crank 20 again; Relative tapering between the described tooth portion 111 that utilizes described joint portion 11 and the groove 211 of described receiving portion 21, described joint portion 11 and described acceptance division 21 can be dispersed in all stress average marks among each tooth and recessed the combination, what become when mounted is easier and more firm, and promotes the use durability degree; So described large fluted disc 30 also is to have play the same tune on different musical instruments wonderful when installing, and the two ends end face 12 of described rotating shaft 10 respectively has a lockhole 121; Having a nut 22 in contrast to a side of acceptance division 21 is arranged among the described acceptance division 21, described nut 22 is locked at described lockhole 121, and the described tooth of packing portion 111 and described groove 211, utilize described nut 22 can strengthen combining of urgent described rotating shaft 10 and described crank, described crank 20 has more an enclosing cover 221, and described enclosing cover 221 lids are located at the opposite end in joint portion 21.
With reference to figure 6 and shown in Figure 7, the utility model designs the respective outer side edges that another embodiment can have fluted disc 50 with general market now, one end of described fluted disc seat 40 has one and wears portion 41, described portion's 41 inwalls that wear have plural gear piece 411, described gear piece 411 has tapering, its tapering is identical with protuberance 212 taperings of described acceptance division 21, and has a locking hole 42 in contrast to a described end that wears portion 41; Described existing fluted disc 50 centres have a perforation 51, and described perforation 51 is coaxial relative with the described portion 41 that wears of described fluted disc seat 40, described existing fluted disc; Described existing fluted disc 50 has more a lock hole 52, and described lock hole 52 is relative with described locking hole 42; One screw 43 can be worn fixing described lock hole 42 of lock and described locking hole 42 with a nut 44; When described crank 20 rotates described rotating shaft 10 and described fluted disc seat 40, owing to have good firm binding force between described crank 20 and described fluted disc seat 40 and the described rotating shaft 10, make when described fluted disc seat 40 rotates, just promote described existing fluted disc 50 simultaneously, therefore, significantly promoted application between the existing design of the utility model and other.
More than explanation is just illustrative for the utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within the protection domain of the present utility model.
Claims (12)
1. bicycle crank firm joint device, described bicycle crank firm joint device comprises:
One rotating shaft, outside face has a gear shape joint portion around the described rotating shaft two ends, has the tooth portion that the plural number that is gear-like is arranged around axially around the described joint portion, has a recess between described tooth portion and the described tooth portion;
At least one crank, described crank one end has one can the relative acceptance division that places combination with described gear shape joint portion, described acceptance division inwall has the groove with the relative combination of described tooth portion, has a protuberance between described groove and the described groove, the relative combination of described recess of described protuberance and described joint portion.
2. according to the described bicycle crank firm joint device of claim 1, it is characterized in that: the axially bundle receipts formation one axial tapering variation from inside to outside of described tooth portion of described joint portion.
3. according to the described bicycle crank firm joint device of claim 2, it is characterized in that: the tapering of the described groove of described acceptance division is relative with the tapering of described tooth portion.
4. according to the described bicycle crank firm joint device of claim 3, it is characterized in that: described joint portion is placed through described acceptance division, the relative tapering combination with described groove of described tooth portion.
5. according to the described bicycle crank firm joint device of claim 1, it is characterized in that: the two ends end face of described rotating shaft respectively has a lockhole.
6. according to the described bicycle crank firm joint device of claim 5, it is characterized in that: have a nut in contrast to a side of acceptance division and be arranged among the described acceptance division.
7. according to the described bicycle crank firm joint device of claim 6, it is characterized in that: described nut is locked in the described lockhole, and packing described tooth portion and described groove.
8. according to the described bicycle crank firm joint device of claim 7, it is characterized in that: described crank has more an enclosing cover, and described enclosing cover lid is located at the opposite end in joint portion.
9. according to the described bicycle crank firm joint device of claim 4, it is characterized in that: described bicycle crank firm joint device further comprises a large fluted disc, described large fluted disc centre has throwing part, it is protruding that described throwing part inwall has plural tooth, described tooth is protruding to have tapering, and its tapering is identical with the protuberance tapering of described acceptance division.
10. according to the described bicycle crank firm joint device of claim 9, it is characterized in that: the joint portion of described rotating shaft is placed through the throwing part of described large fluted disc, and described tooth recess protruding and described joint portion is combined closely.
11. according to the described bicycle crank firm joint device of claim 10, it is characterized in that: the described joint portion of described rotating shaft combines with the described acceptance division of described crank.
12. according to the described bicycle crank firm joint device of claim 4, it is characterized in that: described bicycle crank firm joint device further comprises a fluted disc seat, one end of described fluted disc seat has one and wears portion, the described portion's inwall that wears has plural gear piece, described gear piece has tapering, its tapering is identical with the protuberance tapering of described acceptance division, and has a locking hole in contrast to a described end that wears portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201370307U CN201280204Y (en) | 2008-09-27 | 2008-09-27 | Bicycle crank firm joint device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201370307U CN201280204Y (en) | 2008-09-27 | 2008-09-27 | Bicycle crank firm joint device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201280204Y true CN201280204Y (en) | 2009-07-29 |
Family
ID=40927088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201370307U Expired - Fee Related CN201280204Y (en) | 2008-09-27 | 2008-09-27 | Bicycle crank firm joint device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201280204Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106184580A (en) * | 2016-08-10 | 2016-12-07 | 雷明久 | Bicycle directly-mounting type hollow crank assembly and the processing method of hollow crank |
| WO2021189301A1 (en) * | 2020-03-25 | 2021-09-30 | 徐金兴 | Spline crank structure |
-
2008
- 2008-09-27 CN CNU2008201370307U patent/CN201280204Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106184580A (en) * | 2016-08-10 | 2016-12-07 | 雷明久 | Bicycle directly-mounting type hollow crank assembly and the processing method of hollow crank |
| WO2021189301A1 (en) * | 2020-03-25 | 2021-09-30 | 徐金兴 | Spline crank structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20120927 |