CN2433169Y - Two-stage speed-changing rear axle of bicycle - Google Patents
Two-stage speed-changing rear axle of bicycle Download PDFInfo
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- CN2433169Y CN2433169Y CN 00221221 CN00221221U CN2433169Y CN 2433169 Y CN2433169 Y CN 2433169Y CN 00221221 CN00221221 CN 00221221 CN 00221221 U CN00221221 U CN 00221221U CN 2433169 Y CN2433169 Y CN 2433169Y
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- sun gear
- gear
- wheel
- back shaft
- planetary
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- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims description 4
- 238000003490 calendering Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 3
- 230000007704 transition Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 7
- 230000007935 neutral effect Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002337 anti-port Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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Abstract
The utility model discloses a bicycle second grade variable speed rear axle mainly comprises rear axle roller, sun gear seat, planetary gear, support in the shell part and with the planetary gear seat that the planetary gear round pin linked firmly, the system has the big internal tooth with planetary gear meshing in the shell part, still system has in the shell part to surmount clutch mechanism from the driving wheel, surmount clutch mechanism's action wheel suit on rear axle roller, its one end system has the little internal tooth with sun gear normal mesh, but sun gear one side system has terminal surface clutch mechanism runner, sun gear seat one side system has corresponding terminal surface clutch mechanism braked wheel. The utility model discloses at the variable speed in-process of high, low-speed conversion, there is not the space position of transition, consequently needn't stop the drive just can change speed smoothly, and is very convenient.
Description
The utility model relates to a kind of speed-changing mechanism of non-power-driven vehicle, especially a kind of speed varying back shaft of bicycle.
Known bicycle gearshift has internal speed-changing and outer speed change two classes, and its structure is all comparatively complicated, makes difficulty.In order to simplify part, cost-cutting, the applying date is on August 27th, 1996, application number is that 96230563.4 Chinese patent discloses a kind of two-step speed varying back shaft for bicycle, this speed varying back shaft is mainly by the rear axletree that is supported in the case member, the sun gear of kink on rear axletree, with sun gear engagement and be sleeved on planetary wheel on the planetary wheel pin, with the relatively-stationary sun gear seat of rear axletree, form with coaxial being supported in the case member and of rear axletree with the Planetary gear seat that the planetary wheel pin is connected, wherein being shaped in the case member can be big with sun gear and planetary wheel ingear respectively, small ring gear, be shaped in the sun gear seat can with sun gear ingear inner gear.The principle of work of its two stage speed change is: when the engagement of the inner gear of sun gear and sun gear seat and with case member in the small ring gear jump out of mesh time, sun gear maintains static with respect to rear axletree, the rotation of Planetary gear seat drives planetary wheel, case member produces the speedup rotation (referring to Fig. 1) that rotating speed is higher than Planetary gear seat under planetary revolution and rotation act on simultaneously as a result.When thrust gear make in sun gear and the case member small ring gear engagement and during with the inner gear jump out of mesh of sun gear seat, case member, planetary wheel and sun gear are just as one, and the rotation of Planetary gear seat directly drives case member through planetary wheel and rotates (referring to Fig. 2) synchronously.Though simple in structure, the cost economy of this later-model two-step speed varying back shaft for bicycle, but in use there is the problem that needs to cross over " neutral gear ", promptly in the speed-change process high, that low speed is changed, the position, space that has a transition, must stop to drive speed change smoothly this moment, otherwise injuring part is made troubles to use so easily.
Primary and foremost purpose of the present utility model is: at " neutral gear " problem that above-mentioned existing two-step speed varying back shaft for bicycle exists, propose a kind of two-step speed varying back shaft for bicycle that gets final product smooth speed change that needn't stop to drive.
The further purpose of the utility model is: propose a kind of can guarantee to advance at bicycle inertia (not stepping on foot-operated) and wheel reversing (for example retrodicting) situation under all do not move the two-step speed varying back shaft for bicycle of interference.
In order to reach above-mentioned primary and foremost purpose, two-step speed varying back shaft for bicycle of the present utility model is mainly by the rear axletree that is supported in the case member, the sun gear of kink on rear axletree, with the relatively-stationary sun gear seat of rear axletree, with sun gear engagement and be sleeved on planetary wheel on the planetary wheel pin, form with coaxial being supported in the case member and of rear axletree with the Planetary gear seat that the planetary wheel pin is connected, be shaped in the case member and the big internal tooth of planetary wheel ingear, also be shaped on the overrunning clutch mechanism flower wheel in the case member, (driving wheel of overrunning clutch mechanism is defined as the driving wheel of described overrunning clutch mechanism in the utility model, when its rotating speed is higher than cooresponding overrunning clutch mechanism flower wheel, will drives flower wheel and rotate synchronously; When its rotating speed is lower than cooresponding flower wheel, skid each other.By this definition, overrunning clutch mechanism described in the utility model can be ratchet, detent mechanism, the plane ratchet device, silent ratchet, or the like) be sleeved on one end on the rear axletree and be shaped on little internal tooth with the sun gear constant-mesh, but described sun gear one side is shaped on end face engaging and disengaging gear runner, and described sun gear seat one side is shaped on corresponding end face engaging and disengaging gear brake wheel.
Like this, when sun gear and sun gear seat during by the engagement of end face engaging and disengaging gear, no matter its whether with the little internal tooth jump out of mesh of overrunning clutch mechanism, sun gear all maintains static with respect to rear axletree, the rotation of Planetary gear seat drives planetary wheel, case member produces the speedup rotation that rotating speed is higher than Planetary gear seat under planetary revolution and rotation act on simultaneously as a result.Because there is " overdrive clutch " relation in the overrunning clutch mechanism between case member and the rear axletree, promptly when the rotating speed of case member is higher than the overdrive clutch driving wheel, " skid " between flower wheel and driving wheel, therefore there is not movement interference mutually.When thrust gear made the end face engaging and disengaging gear jump out of mesh of sun gear and sun gear seat, case member, planetary wheel and sun gear were just as one, and the rotation of Planetary gear seat directly drives case member through planetary wheel and rotates synchronously.This shows, in use there is not the problem that needs to cross over " neutral gear " in two-step speed varying back shaft for bicycle of the present utility model, promptly in the speed-change process high, that low speed is changed, does not have the position, space of transition, therefore needn't stop to drive just speed change smoothly, bring convenience to use like this.
In order to reach the further purpose of the utility model, end face engaging and disengaging gear in the above-mentioned two-step speed varying back shaft for bicycle is unidirectional end face engaging and disengaging gear, be but that sun gear one side is shaped on the unidirectional end face engaging and disengaging gear runner that forward turns round and counterpart engagement, antiport and counterpart are skidded, described sun gear seat one side is shaped on corresponding end face one-way clutch mechanism brake wheel.
During the bicycle inertia traveling, the Planetary gear seat that is connected with bicycle chainwheel is relative static.Under non-speedup state, sun gear and sun gear seat disengaged position as long as overrunning clutch mechanism works the effect of skidding, just can guarantee not have movement interference; And under the speedup state of kinematic motion,,, therefore can not produce any movement interference because it exists and the similarly unidirectional effect of skidding of overriding clutch each other though the unidirectional end face engaging and disengaging gear of sun gear and sun gear seat does not have disengaged position yet.When bicycle quick reverses, case member will drive planetary wheel, Planetary gear seat and sun gear and reverse together, and the skidding of unidirectional end face engaging and disengaging gear between sun gear and the sun gear seat guaranteed not have the generation of movement interference conscientiously at this moment.
This shows that the utility model has not only been properly settled the problem of avoiding crossing over " neutral gear ", has also guaranteed its safety and reliability under various running statees simultaneously.The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a two-step speed varying back shaft for bicycle fast state structural representation in the existing patent.
Fig. 2 is a two-step speed varying back shaft for bicycle lower-speed state structural representation in the existing patent.
Fig. 3 is the structural representation of the utility model embodiment one.
Fig. 4 is the A-A section-drawing of Fig. 3 embodiment.
Fig. 5 is the high speed transmission principle figure of Fig. 3 embodiment.
Fig. 6 is the structural representation of the utility model embodiment two.
Fig. 7 and Fig. 8 are two kinds of overrunning clutch mechanism scheme drawings in addition that can be equal to replacement with Fig. 4.
Fig. 9 is that the B of sun gear seat among Fig. 1 embodiment is to the profile of tooth enlarged drawing.
Vital parts among Fig. 3 and Fig. 4 is as follows: 1-shell 2-rear axletree 3-gear ring 4-planetary wheel 5-planetary wheel pin 6-sun gear 7-sun gear seat 10-rocking arm 13-promotes 16-Planetary gear seat 19-lateral pin 20-ratchet 22-pawl base 23-stage clip
Embodiment one
Die casting shell 1 among Fig. 3 constitutes the unsplit casing parts with gear ring 3 pressings that are shaped on inner gear and handle ratchet wheel, rear axletree 2 by bearings in case member.Sun gear 6 kinks are on rear axletree 2, and its left end is resisted against stage clip 23 1 ends that are set in rear axletree 2 and axial limiting, and its right-hand member is shaped on unidirectional end face tooth, and is fixed with lateral pin 19, and this lateral pin is resisted against promotes 13 1 ends.Sun gear seat 7 and rear axletree relative fixed, its left end be shaped on can with the sun gear 6 right-hand members unidirectional end face tooth unidirectional end face teeth of corresponding ingear (profile of tooth is referring to Fig. 9), between sun gear seat 7 and Planetary gear seat 16, antifriction-bearing box is housed.Planetary gear seat 16 and rear axletree 2 coaxial being supported in the case member, its border three the uniform planetary wheel pins 5 that press.Three planetary wheels 4 are inserted into respectively on the planetary wheel pin 5, and while and the external tooth of sun gear 6 and the internal gearing of gear ring 3.Two ratchet 20 uniform being installed on the pawl base 22, pawl base 22 block sets are in the interior circle of gear ring 3 and be sleeved on the rear axletree 2, handle ratchet wheel engagement (referring to Fig. 4) during assembling and in the case member, its right-hand member are shaped on when assembling and sun gear 6 ingear small ring gears.Rocking arm 10 hinged right-hand members at rear axletree, its lower end abutment is at the right-hand member of promoting 13.
Other component assembly relation is all similar to existing bicycle, does not give unnecessary details in addition.
After the two-step speed varying back shaft for bicycle of present embodiment is applied on the variable speed bicycle (its field of application is not limited to bicycle, and other unpowered vehicle such as three-wheel vehicle also can adopt), can produce two kinds of riding speeds of height.When rocking arm 10 is positioned at Fig. 3 dotted line position, sun gear 6 meshes by the end face tooth with sun gear seat 7 under the reset response of stage clip 23, no matter its whether with the small ring gear jump out of mesh of pawl base 22, sun gear 6 all maintains static with respect to rear axletree 2, this moment, the rotation of Planetary gear seat 16 drove three planetary wheels 4, made the revolution ω of case member at planetary wheel 4
1With rotation ω
2Effect simultaneously produces the speedup rotation ω (referring to Fig. 5) that rotating speed is higher than Planetary gear seat 16, thereby realizes riding at a high speed down.Because when the rotating speed of case member was higher than pawl base 22, handle ratchet wheel and ratchet 20 skidded, so there is not movement interference each other in it.And when rocking arm 10 is positioned at Fig. 3 solid line position, the side tooth jump out of mesh of the side tooth of sun gear 6 and sun gear seat 7, the same integral body that is connected of case member, planetary wheel 4 and sun gear 6 shapes, the rotation of Planetary gear seat 16 directly drives case member through planetary wheel 4 and rotates synchronously, thereby realization low speed is ridden.Because the engagement mutually noninterfere of ratchet and pawl arrangement and end face tooth, thus the two-step speed varying back shaft for bicycle of present embodiment can be indiscriminately ad. as one wishes speed change at any time, needn't worry to exist speed change " neutral gear ".Simultaneously, unidirectional end face tooth of sun gear seat 7 left ends and the unidirectional end face tooth of corresponding with it ingear sun gear 6 right-hand members, the bicycle that has guaranteed to adopt the present embodiment speed changing structure does not all have movement interference under various situations such as inertia operation, wheel reversing, fool proof reliable.The outstanding advantage of another of this two-step speed varying back shaft for bicycle is, most parts are with originally general, therefore produces, assembly technology changes for a short time, is convenient to practice.
Embodiment two
The difference of present embodiment and embodiment one is that shell 1 constitutes the unsplit casing parts by calendering attaching parts 2 ' and gear ring 3 pressings that are shaped on inner gear and handle ratchet wheel.Like this, the weight of case member is lighter, and cost is more economical.In addition, the end face tooth of present embodiment sun gear 6 right-hand members and cooresponding sun gear seat 7 left end end face teeth are one way engagement end face tooth.Make that like this speed change of present embodiment is more steady reliable.
In addition to the implementation, the utility model can also have other embodiment.For example, overrunning clutch mechanism can adopt Fig. 7 or structure shown in Figure 8, promptly adopts wedging ball 20 ' or wedge block 20 " structure replaces the ratchet among Fig. 4, the technical scheme of driving wheel, flower wheel respective change.Even can adopt plane ratchet device (profile of tooth is referring to Fig. 9), be gear ring 3 among Fig. 3 change into be connected with driven plane ratchet or make pawl base among one Fig. 3 change into an end be shaped on can with the driving ratchet of driven plane ratchet engaged, like this, can realize the purpose of this utility model equally in theory, and structure is simplified more.In addition, the end face engaging and disengaging gear adopts friction plate clutch mechanism, perhaps planetary wheel number change; Or the like.In a word, all employings are equal to and replace or wait the technical scheme of conversion formation to be protection domain of the present utility model.
Claims (10)
1. two-step speed varying back shaft for bicycle, main by the rear axletree (2) that is supported in the case member, the sun gear (6) of kink on rear axletree (2), with the relatively-stationary sun gear seat of rear axletree (2) (7), mesh and be sleeved on planetary wheel (4) on the planetary wheel pin (5) with sun gear (6), form with coaxial being supported in the case member and of rear axletree (2) with the Planetary gear seat (16) that planetary wheel pin (5) is connected, be shaped in the case member and the big internal tooth of planetary wheel (4) ingear, it is characterized in that: also be shaped on the overrunning clutch mechanism flower wheel in the described case member, the driving wheel of described overrunning clutch mechanism is sleeved on the rear axletree (2), the one end is shaped on the little internal tooth with sun gear (6) constant-mesh, described sun gear (6) but a side is shaped on end face engaging and disengaging gear runner, described sun gear seat (7) one sides are shaped on corresponding end face engaging and disengaging gear brake wheel.
2. two-step speed varying back shaft for bicycle according to claim 1 is characterized in that: described end face engaging and disengaging gear is unidirectional end face engaging and disengaging gear.
3. two-step speed varying back shaft for bicycle according to claim 1, it is characterized in that: described overrunning clutch mechanism is a ratchet and pawl arrangement, described shell (1) constitutes the unsplit casing parts with gear ring (3) pressing that is shaped on inner gear and handle ratchet wheel, ratchet (20) is installed on the pawl base (22), described pawl base (22) is sleeved on the rear axletree (2), the handle ratchet wheel engagement during assembling and in the case member.
4. two-step speed varying back shaft for bicycle according to claim 2, it is characterized in that: described unidirectional end face engaging and disengaging gear is unidirectional end face tooth engaging mechanism, described sun gear (6) right-hand member is shaped on unidirectional end face tooth, described sun gear seat (7) and rear axletree relative fixed, its left end be shaped on can with the unidirectional end face tooth of the corresponding ingear of the unidirectional end face tooth of sun gear (6) right-hand member.
5. two-step speed varying back shaft for bicycle according to claim 3, it is characterized in that: described sun gear (6) left end is resisted against stage clip (23) one ends that are set in rear axletree (2) and axial limiting, and being fixed with lateral pin (19), this lateral pin is resisted against distribution (13) one ends.
6. two-step speed varying back shaft for bicycle according to claim 4 is characterized in that: between described sun gear seat (7) and the Planetary gear seat (16) antifriction-bearing box is housed.
7. two-step speed varying back shaft for bicycle according to claim 1 or 5, it is characterized in that: described Planetary gear seat (16) the border at least one planetary wheel pin (5) that pressed, the planetary wheel of respective amount (4) correspondence is inserted on the planetary wheel pin (5), and while and the external tooth of sun gear (6) and the internal gearing of gear ring (3).
8. two-step speed varying back shaft for bicycle according to claim 1 is characterized in that: described shell (1) constitutes the unsplit casing parts by calendering attaching parts (2 ') and gear ring (3) pressing that is shaped on inner gear and handle ratchet wheel.
9. two-step speed varying back shaft for bicycle according to claim 1 is characterized in that: described overrunning clutch mechanism adopts wedging ball (20 ') structure.
10. two-step speed varying back shaft for bicycle according to claim 1 is characterized in that: described overrunning clutch mechanism adopts the plane ratchet device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221221 CN2433169Y (en) | 2000-07-31 | 2000-07-31 | Two-stage speed-changing rear axle of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221221 CN2433169Y (en) | 2000-07-31 | 2000-07-31 | Two-stage speed-changing rear axle of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2433169Y true CN2433169Y (en) | 2001-06-06 |
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ID=33586149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00221221 Expired - Fee Related CN2433169Y (en) | 2000-07-31 | 2000-07-31 | Two-stage speed-changing rear axle of bicycle |
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| Country | Link |
|---|---|
| CN (1) | CN2433169Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266503A (en) * | 2017-01-04 | 2018-07-10 | 李激初 | Transmission device and internal speed changer and shifting control method based on planetary gear train |
-
2000
- 2000-07-31 CN CN 00221221 patent/CN2433169Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266503A (en) * | 2017-01-04 | 2018-07-10 | 李激初 | Transmission device and internal speed changer and shifting control method based on planetary gear train |
| CN108266503B (en) * | 2017-01-04 | 2023-11-24 | 广东洛梵狄智能科技有限公司 | Transmission device based on planetary gear train, internal transmission and speed change control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |