CN203318631U - Bicycle bottom bracket with speed increasing device - Google Patents
Bicycle bottom bracket with speed increasing device Download PDFInfo
- Publication number
- CN203318631U CN203318631U CN2013203113888U CN201320311388U CN203318631U CN 203318631 U CN203318631 U CN 203318631U CN 2013203113888 U CN2013203113888 U CN 2013203113888U CN 201320311388 U CN201320311388 U CN 201320311388U CN 203318631 U CN203318631 U CN 203318631U
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- ball
- planetary gear
- fluted disc
- crank shaft
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Abstract
The utility model relates to a bicycle bottom bracket with a speed increasing device. The bicycle bottom bracket structurally comprises a crankshaft. A shaft casing of a central external gear, a planetary gear stand, an internal tooth disk and a sprocket seat are sequentially arranged on the crankshaft, a spline is arranged on the crankshaft and is meshed with an internal spline of the planetary gear stand, three to six planetary gears are uniformly arranged on the planetary gear stand and are meshed with the central external gear and the internal tooth disk, steel ball rolling grooves are formed in corresponding inner sides of both the planetary gear stand and the internal tooth disk, steel balls are arranged in the steel ball rolling grooves, and the internal tooth disk is fixedly connected with a sprocket. The bicycle bottom bracket has the advantages that the speed increasing device is arranged on the bottom bracket, so that a cyclist can pedal a crank and the sprocket at variable speeds, and effects of a large sprocket can be realized by the small-diameter sprocket; a force exertion blind spot zone of the cyclist in a periodic pedaling procedure is in positive transition, force of the cyclist can be stably exerted in the periodic pedaling procedure, and the shortcoming of high fluctuation of force difference between an active pedaling procedure and a passive pedaling procedure in the traditional pedaling periodic procedure is overcome.
Description
Technical field
The utility model relates to a kind of bicycle middle shaft, particularly relates to a kind of bicycle middle shaft that is provided with boost installation.
Background technology
Because the vehicle frame of popular functional small wheel bicycle, particularly folding bicycle, perambulator in recent years is less; Vehicle frame is little, wheel is corresponding to be reduced, for guaranteeing that bicycle has reasonably " stroke ", stroke refers to that crank rotates the distance that a circle bicycle travels particularly, and the sprocket wheel on the ordinary bicycle axis and trailing wheel fluted disc adopt 1: 2.5 converter speed ratio substantially, for guaranteeing reasonably " stroke ", to reach comfortable purpose of riding, have to adopt larger sprocket wheel, so produced a disproportionate ratio with car load, affected the attractive in appearance of bicycle, used also inconvenient.
Advancing of ordinary bicycle is all to pedal crank by the rider to make 360 ° of circular movements, in being pedaled to research the rider left and right pin cycle, find, active pedal and the passive poor fluctuation of strength of pedaling between transition large, the mechanical characteristics of exerting oneself suddenly is very obvious; And this fluctuation and burst are firmly, easily cause the quick fatigue of pedaling leg.Cause that to pedal major cause that fluctuation is large be that standard bicycle is pedaled crank and is on same straight line, its symmetry is pedaled and is caused the firmly blind spot district of 20 °-30 ° with the transitional structure technology, this regional transition realizes with pedaling force of inertia and climbing the power process of pedaling, and this kind of transition condition depends on rider's the braking technique state of pedaling, this process has expended certain physical efficiency, has aggravated leg fatigue.
Summary of the invention
Technical problem to be solved in the utility model is in order to overcome the defect of small-wheel-diameter in above-mentioned prior art, trolley frame hinge wheel, and provide the new bicycle axis of a kind of sprocket wheel output speed higher than crankshaft speed, extensively in applicable common car, small-wheel-diameter car, folded bicycle and perambulator etc., the existing bicycle constant speed of solution is simultaneously pedaled and the blind spot problem occurred, and the kinetic force of pedaling that the rider is sent is used more effectively.
For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that a kind of bicycle middle shaft that is provided with boost installation, comprise a crank shaft, be provided with successively the axle housing of center external gear on described crank shaft, planetary gear carrier, interior fluted disc and chain pulley seat, described crank shaft is provided with spline, spline is meshed with the female splines of planetary gear carrier, evenly on described planetary gear carrier be provided with 3～6 planetary wheels, and planetary wheel is meshed with center external gear and interior fluted disc, the described planetary gear carrier inboard corresponding with interior fluted disc is equipped with the steel ball slot rolling, be equiped with ball in the steel ball slot rolling, described interior fluted disc is fixedly connected with chain pulley seat.
Be equipped with bearing and the check nut of installation crank shaft in axle housing with the axle housing two ends on described crank shaft.
Described crank shaft is provided with the ball base coordinated with planetary gear carrier outside slot rolling, sidewinders outside in groove and ball base and is equiped with ball.
Described crank shaft is provided with the ball grooves coordinated with the outer ball grooves of interior fluted disc, is equiped with ball in ball grooves and ball grooves outside.
Also be provided with the ball lid between described interior fluted disc and chain pulley seat.
The distolateral dust keeper that is socketed with cover of dust, malthoid and gear felt collar composition of described interior fluted disc.
Described chain pulley seat is provided with the sprocket wheel erecting frame.
Described crank shaft two ends are provided with crank mount pad and fastening nut.
Described axle housing is provided with coupling nut and tight fixed ring, for the axle housing by axis, installs and is anchored on the cycle frame five-way.
The beneficial effects of the utility model, be provided with boost installation on axis due to the utility model, the rider drives crankshaft rotation by pedal, the planetary gear carrier be engaged with by the crank shaft upper spline, drive the four lines star gear of planetary gear carrier around being fixed in 360 ° of rotations of axle housing center external tooth crop rotation, planetary rotation, drive is compared transmission with the difference of the interior fluted disc of planetary wheel engagement, secondary transmission due to center external gear and interior fluted disc, the rotating speed of chain pulley seat is greater than the rotating speed of crank shaft, its minor sprocket reaches the effect of hinge wheel, and reached the effect of speedup, and firmly blind spot district that the rider is pedaled process the cycle obtain positive transition with steadily firmly, overcome the tradition large shortcoming of pedaling that the active of periodic process is pedaled and the strength difference of passive interprocedual fluctuates.
The boost installation that the utility model is provided with and bicycle middle shaft, as an integral structure, are different from the boost installation of other type, can directly be loaded in the five-way of bicycle, must not do any change, easy for installation, and commonality, reliability are strong.
The accompanying drawing explanation
Fig. 1 is the utility model sectional structure schematic diagram.
Fig. 2 is the utility model decomposition texture schematic diagram.
Fig. 3 is fluted disc structure scheme of installation in the utility model.
Fig. 4 is the utility model dust keeper scheme of installation.
Fig. 5 is the utility model chain pulley seat structure scheme of installation.
Fig. 6 is that the utility model is arranged on the schematic diagram on bicycle.
The specific embodiment
For further setting forth the utility model, be to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, the specific embodiment, structure, feature and effect thereof to according to the utility model proposes, be described in detail as follows.
As depicted in figs. 1 and 2, for structure cross-sectional schematic and decomposition chart, the bicycle middle shaft that is provided with boost installation of the present utility model, directly be installed in the five-way of bicycle, it mainly comprises crank shaft 1, be provided with successively axle housing 3, planetary gear carrier 4, interior fluted disc 5 and the chain pulley seat 6 of center external gear 2 on crank shaft 1, described crank shaft 1 is provided with spline 11, spline 11 is meshed with the female splines 41 of planetary gear carrier 4, evenly on described planetary gear carrier 4 be provided with 3～6 planetary wheels 7, be installed on planetary gear carrier 4 by compensating-gear shaft 71; And planetary wheel 7 is meshed with center external gear 2 and interior fluted disc 5, crank shaft 1 drives 4 rotations of star gear stand by spline, planetary wheel 7 is done around rotation around the axle housing 3 Shang De center external gears 2 that are fixed in five-way, and the interior fluted disc 5 that drives passive output is made High Rotation Speed, referring to Fig. 3; Described planetary gear carrier 4 and the corresponding inboard of interior fluted disc 5 are equipped with steel ball slot rolling 42,51, in steel ball slot rolling 42,51, ball 8 are housed, and make both form class and look a surface bearing, independent spinning movement, described interior fluted disc 5 is fixedly connected with chain pulley seat 6 use bolts.
The over-speed gear ratio of described center external gear 2 and interior fluted disc 5 is looked actual next definite, and its variation range is being greater than 1.6～2 intervals
On described crank shaft 1, bearing 31 and the check nut 12 of fixed crank axle 1 in axle housing 3 at equipped and axle housing 3 two ends, make crank shaft 1 steadily rotation in axle housing 3.
Described crank shaft 1 is provided with the ball base 13 coordinated with planetary gear carrier 4 outside slot rollings 43, sidewinder outside in groove 43 and ball base 13 be equipped with ball 8 '.
Described crank shaft 1 is provided with the ball grooves 14 coordinated with the outer ball grooves 52 of interior fluted disc 5, in ball grooves 52 and ball grooves 14, ball 8 is housed outside ".
Above design, 3 of crank shaft 1 and axle housings are equipped with radial thrust bearing 31, be equipped with steel ball in the ball grooves that crank shaft 1 is corresponding with planetary gear carrier 4 and interior fluted disc 5 and planetary gear carrier 4 and the corresponding ball grooves of interior fluted disc 5, by check nut 12, be positioned on crank shaft 1, guaranteed the steady rotation on crank shaft 1 of planetary gear carrier 4 and interior fluted disc 5, referring to Fig. 1.
6 of described interior fluted disc 5 and chain pulley seats also are provided with ball lid 9
The distolateral cover of dust 33 that is socketed with of the described interior fluted disc 5 in axle housing 3 one sides, embedded oil-containing malthoid 32, peripheral hardware gear felt collar 34.
The design of above dust keeper, mechanism's compactness; Guaranteed the leak tightness of boost installation, but actv. prevents entering of dustiness, increased the service life of product, referring to Fig. 4.
Described chain pulley seat 6 is provided with sprocket wheel erecting frame 61, can pacify the demand according to vehicle and speed ratio, and sprocket wheel 62 and the pollutant baffle plate 63 of the different numbers of teeth of assembling on chain pulley seat 6 or sprocket wheel erecting frame 61, referring to Fig. 5.
Described crank shaft 1 two ends are provided with crank mount pad 15 and fastening nut 16, can make left and right crank 17 firmly be arranged on crank shaft 1, and described crank mount pad 15 sides of can be taper or cone spline shape, referring to Fig. 6.
Described axle housing 3 is provided with coupling nut 36 and tight fixed ring 35, axle housing 3 directly is loaded in the five-way 10 of cycle frame, referring to Fig. 6; Both sides at tight fixed ring 36 also are provided with anti-rotation damper bar, after making the speedup axis be anchored in five-way 10 with coupling nut 36 and tight fixed ring 35, sprocket wheel 62 are linked and get final product with rear flywheel.
The bicycle middle shaft that is provided with boost installation of the present utility model, the rider is pedaled crank shaft 1 rotation, drive planetary gear carrier 4 rotations of seat on crank shaft 1, the four lines star gear 7 of planetary gear carrier 4 is done 360 ° of rotations around being fixed in axle housing 3 center external gears 2, the rotation of planetary wheel 7, drive is compared transmission with the difference of the interior fluted disc 5 of planetary wheel 7 engagements, due to the secondary transmission of center external gear 2 with interior fluted disc 5, the larger transmitting ratio of interior fluted disc 5 output, make the rotating speed of sprocket wheel 62 be greater than the rotating speed of crank shaft 1, the sprocket wheel 62 of its path reaches the effect of hinge wheel, realized pedaling crank, the sprocket wheel non-uniform movement, and reached the effect of speedup, guaranteed reasonably " stroke ", improve the kinematic velocity of bicycle and the comfort of riding, the firmly blind spot district that simultaneously makes the rider pedal process the cycle obtains positive transition and steadily exerts oneself, having overcome traditional active of pedaling periodic process pedals with the strength difference fluctuation of passive interprocedual large, cause the shortcoming of leg fatigue, the utilization that makes power that the rider sends obtain exposing one's misdeeds or crimes.
The bicycle middle shaft that is provided with boost installation of the present utility model is reasonable in design, volume is little, as an integral structure, the axis boost installation that is different from other type, can directly be loaded in the five-way of bicycle, its vehicle frame can not must be done any change, easy for installation, commonality, reliability is strong, the spy is applicable to the minibike of small-wheel-diameter, folded bicycle, because the wheel footpath is little, the requirement speed ratio is large, could keep normally or the slightly fast speed of a motor vehicle, because the sprocket wheel of installing on this axis is little, the visual sense of bicycle is fine: this boost installation also is applicable to ordinary bicycle equally, can select flexibly according to the actual requirements, market is extensive.
Above-described embodiment is only in order to the utility model to be described but do not limit the utility model, any change that every spirit that does not break away from the utility model claim is done and replace and all belong to scope of the present utility model.
Claims (9)
1. a bicycle middle shaft that is provided with boost installation, comprise a crank shaft (1), it is characterized in that: the axle housing (3) that is provided with successively center external gear (2) on described crank shaft (1), planetary gear carrier (4), interior fluted disc (5) and chain pulley seat (6), described crank shaft (1) is provided with spline (11), the spline (11) of described crank shaft (1) is meshed with the female splines (41) of planetary gear carrier (4), upper even 3～6 planetary wheels (7) of establishing of described planetary gear carrier (4), and planetary wheel (7) is meshed with center external gear (2) and interior fluted disc (5), described planetary gear carrier (4) and the corresponding inboard of interior fluted disc (5) are equipped with steel ball slot rolling (42, 51), steel ball slot rolling (42, 51) be equiped with ball (8) in, described interior fluted disc (5) is fixedly connected with chain pulley seat (6).
2. the bicycle middle shaft that is provided with boost installation according to claim 1, it is characterized in that: be installed on the bearing (31) coordinated with axle housing (3) two ends on described crank shaft (1), it is upper that described bearing (31) is installed in crank shaft (1) to axle housing (3), and fixing by check nut (12).
3. the bicycle middle shaft that is provided with boost installation according to claim 1, it is characterized in that: described crank shaft (1) is provided with the ball base (13) coordinated with planetary gear carrier (4) outside slot rolling (43), sidewinders outside in groove (43) and ball base (13) and is equiped with ball (8 ').
4. the bicycle middle shaft that is provided with boost installation according to claim 1, it is characterized in that: described crank shaft (1) is provided with the ball grooves (14) coordinated with the outer ball grooves of interior fluted disc (5) (52), is equiped with ball (8 ") in ball grooves (52) and ball grooves (14) outside.
5. the bicycle middle shaft that is provided with boost installation according to claim 1, is characterized in that: also be provided with ball lid (9) between described interior fluted disc (5) and chain pulley seat (6).
6. the bicycle middle shaft that is provided with boost installation according to claim 1, is characterized in that: the described distolateral dust keeper that is socketed with cover of dust (33), malthoid (32) and gear felt collar (34) composition at interior fluted disc (5).
7. the bicycle middle shaft that is provided with boost installation according to claim 1, it is characterized in that: described chain pulley seat (6) is provided with sprocket wheel erecting frame (61).
8. the bicycle middle shaft that is provided with boost installation according to claim 1, it is characterized in that: described crank shaft (1) two ends are provided with crank mount pad (15) and fastening nut (16).
9. the bicycle middle shaft that is provided with boost installation according to claim 1 is characterized in that: described axle housing (3) is provided with to be installed axle housing (3) to be anchored on coupling nut (36) and the tight fixed ring (35) in cycle frame five-way (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203113888U CN203318631U (en) | 2013-05-31 | 2013-05-31 | Bicycle bottom bracket with speed increasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203113888U CN203318631U (en) | 2013-05-31 | 2013-05-31 | Bicycle bottom bracket with speed increasing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203318631U true CN203318631U (en) | 2013-12-04 |
Family
ID=49658004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203113888U Expired - Fee Related CN203318631U (en) | 2013-05-31 | 2013-05-31 | Bicycle bottom bracket with speed increasing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203318631U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105667691A (en) * | 2016-01-13 | 2016-06-15 | 魏恒德 | Bicycle driving system |
| CN108791688A (en) * | 2018-07-16 | 2018-11-13 | 深圳市概念智慧科技有限公司 | Transmission ratio bottom bracket shell device in a kind of single speed |
-
2013
- 2013-05-31 CN CN2013203113888U patent/CN203318631U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105667691A (en) * | 2016-01-13 | 2016-06-15 | 魏恒德 | Bicycle driving system |
| CN105667691B (en) * | 2016-01-13 | 2018-05-25 | 魏恒德 | A kind of bicycle drive train system |
| CN108791688A (en) * | 2018-07-16 | 2018-11-13 | 深圳市概念智慧科技有限公司 | Transmission ratio bottom bracket shell device in a kind of single speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Lu Bosheng Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Lu Bosheng Document name: Notification of Termination of Patent Right |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20160531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |