CN102745300B

CN102745300B - Reverse-stepping multi-stage gear-shifting internal transmission

Info

Publication number: CN102745300B
Application number: CN201210097731.3A
Authority: CN
Inventors: 苏醒扬; 林新发
Original assignee: SunRace Sturmey Archer Inc
Current assignee: SunRace Sturmey Archer Inc
Priority date: 2011-04-21
Filing date: 2012-04-05
Publication date: 2016-05-18
Anticipated expiration: 2032-04-05
Also published as: CN102745300A

Abstract

A multi-stage reverse-pedaling speed-changing internal speed variator for bicycle is composed of a drive axle able to rotate forward or backward, a speed-changing gear set unit, a speed-changing cam set unit and a drive base for outputting power. The speed change gear set unit comprises a plurality of transmission gears and a plurality of speed change gears which are correspondingly meshed with the transmission gears. When the transmission axis rotates reversely, the gear shifting cam group unit can be driven to further determine which transmission gear in the speed changing gear group unit can be driven to rotate by the transmission axis when the transmission axis rotates forwards, and the function of reversely stepping on multi-stage gear shifting can be achieved.

Description

Step on multistage shift internal speed changer

Technical field

The present invention relates to one and step on multistage shift internal speed changer, particularly one is suitable for device at bicycleUpper, and the one that can reverse the variable speed operation that carries out multiple sections of gears by foot-operated driving crank is stepped on multistageShift internal speed changer.

Background technology

Along with people for environmental protection, happy live, consciousness that body-building and natural resources are exhausted emerges, existing more nextThe bicycle that more people are pollution-free to have concurrently, do not consume natural resources and sport and body-building advantage is ridden instead of walk,The locomotive polluting again to replace power consumption.

At present commercially available variable-ratio bicycle is to adopt the driving lever of outer speed changer to stir chain to be engaged in mostlyThe fluted disc of different size, reaches speed changing function. Although once someone disclosed one and was installed in cycle hubInternal speed changer, it can reverse to carry out the operation of high, low speed shift by the foot-operated fluted disc that drives; But, byConventionally there is in this kind of existing internal speed changer mechanism the speed change that can only do two sections, or have mechanism's complexity, one-tenthThe reaction of this height, shift operation is the disappearance such as certain not rapidly, and has the space of further improvement.

Summary of the invention

The first object of the present invention is to provide one to step on multistage shift internal speed changer, can rely on foot-operated drivingCrank reverses to carry out the shift operation of at least three sections of gears, and simple with mechanism, cost is low andShift operant response is the advantage such as certain rapidly.

In order to achieve the above object, the invention provides one and step on multistage shift internal speed changer, include:

One driving axle center, its be incorporated into a power intake and be subject to the driving of this power intake and just carry out,Return motion is provided with the multiple ratchet accommodation seats that extend along an axle center in this driving axle center;

One speed change axle center, and be separated by a preset distance setting parallel with this driving axle center;

One gear teeth wheels unit, it includes multiple travelling gears and multiple change-speed gearing; The plurality of biographyMoving gear is sheathed in driving axle center, and the plurality of change-speed gearing is sheathed on this variable-speed shaft in the heart and with the plurality ofThe corresponding engagement of travelling gear;

One shift cam group unit, it includes multiple cams, multiple axle center ratchet and at least one shift controlRatchet processed; The plurality of cam and multiple axle center ratchet are sheathed in this driving axle center, and the plurality of axle center ratchetWith driving axle center interlock synchronous rotary; The plurality of axle center ratchet be contained in respectively in the plurality of ratchet accommodation seat andBe subject to the plurality of cam rotation control and switch on individually between a retracted position and a jack-up position; This extremelyA few shift control ratchet abuts the side in multiple cams, and this shift control ratchet is corresponding to power transmission shaftThe return motion of the heart and support the plurality of cam and make the plurality of cam carry out the rotation fortune with respect to this driving axle centerMove and then control the position handover operation of the plurality of axle center ratchet; Wherein, the plurality of axle center ratchet has respectivelyOne brake tooth, and the position of the brake tooth of each axle center ratchet corresponds respectively in the plurality of travelling gear whereinOne travelling gear; In the time that one of them axle center ratchet is positioned at this jack-up position, the system of the axle center ratchet of this jack-upMoving tooth will be supported its corresponding travelling gear and will be transmitted axle center and in the time of forward, drives and revolveTurn, the corresponding travelling gear of axle center ratchet that is positioned at this retracted position as for other will can not be transmitted axleThe heart directly drives in the time of forward; And,

One transmission pedestal, is incorporated between a clutch end and the plurality of travelling gear, and this transmission pedestal is subject toThe driven rotary of the plurality of travelling gear and then the rotary power during by forward export this clutch end to; ItsIn, by this travelling gear of this driving axle center institute driven rotary collocation with its plurality of speed change of corresponding engagementA wherein change-speed gearing in gear can determine the rotary speed of this transmission pedestal, therefore, and by this power transmission shaftWhen the travelling gear of heart institute driven rotary changes, the rotary speed of this transmission pedestal also can change.

The described multistage shift internal speed changer of stepping on, wherein:

The plurality of travelling gear includes one first travelling gear and one second travelling gear; This first driving cogWheel combination and interlock are in this transmission pedestal, and therefore this transmission pedestal is subject to this first travelling gear directly to drive and revolveTurn; And, in an internal ring portion of each travelling gear be respectively provided with respectively can unidirectional slippage multiple against dimple,The multiple of each travelling gear can be positioned at this jack-up position and in transmission at its corresponding brake tooth against dimpleWhen axle center forward, be subject to supporting of this brake tooth and transmission;

The plurality of change-speed gearing includes a first stud gear and a second stud gear, this first gear teethWheel and the engagement corresponding to the first travelling gear and the second travelling gear respectively of this second stud gear;

The plurality of cam includes one first axle center stationary cam and a shift control cam; This first axle center is solidDetermine that cam is fixed in this driving axle center and with this driving axle center interlock rotation; This shift control cam is with an energyThe mode of enough relative slidings is sheathed in driving axle center; An outer portion in the first axle center stationary cam is provided with energyEnough force shift ratchet and the multiple cam bits that lean projection slippage; An outer portion in shift control cam is establishedThere are multiple projections that lean, and are provided with multiple inner fovea parts in an internal ring portion of shift control cam;

The plurality of axle center ratchet includes one first axle center ratchet and one second axle center ratchet; Each axle center ratchet dividesDo not comprise this brake tooth and a teeth change, and the brake tooth of each axle center ratchet is to synchronize to switch on teeth changeBetween this retracted position and this jack-up position; The position of the brake tooth of this first axle center ratchet corresponding to this firstThe internal ring portion of travelling gear, the position of the brake tooth of this second axle center ratchet is corresponding to this second travelling gearInternal ring portion; The position of the teeth change of each axle center ratchet is all the internal ring portion places corresponding to this shift control cam,When the position of one of them inner fovea part of this shift control cam is corresponding to the teeth change of one of them axle center ratchetPosition time, the teeth change of this corresponding axle center ratchet can head in its corresponding this inner fovea part, enterAnd also synchronous jack-up and switch to this jack-up position of the brake tooth that makes this corresponding axle center ratchet; Relatively, whenWhen the position of the teeth change of one of them axle center ratchet there is no the position that corresponds to arbitrary inner fovea part, this axle centerRatchet is in this retracted position;

This at least one shift control ratchet includes one first shift control ratchet, and this first shift control sour jujubePawl can switch on a slippage position and and support between position; The position pair of this first shift control ratchetShould be in the outer portion of the outer portion of this first axle center stationary cam and this shift control cam; This first shift controlRatchet processed be subject to this first axle center stationary cam multiple cam bits Effect of Rotation and switch on this slippage positionAnd support between position, and, in the time that the first shift control ratchet is positioned at this and supports position, this first shiftControl ratchet and can support the projection that leans of this shift control cam, be positioned at and work as the first shift control ratchetWhen this slippage position, can not support the projection that leans of this shift control cam.

The described multistage shift internal speed changer of stepping on, wherein:

The plurality of travelling gear includes one first travelling gear, one second travelling gear and one the 3rd driving cogWheel; This first travelling gear combination and interlock are in this transmission pedestal, and therefore this transmission pedestal is subject to this first transmissionDirectly driven rotary of gear institute; And being respectively provided with respectively in an internal ring portion of each travelling gear can unidirectional cunningDe-is multiple against dimple, and the multiple of each travelling gear can be positioned at its corresponding brake tooth against dimpleThis jack-up position and be subject to supporting of this brake tooth and transmission in the time of driving axle center forward;

The plurality of change-speed gearing includes a first stud gear, a second stud gear and one the 3rd gear teethWheel, this first stud gear, a second stud gear and one the 3rd change-speed gearing respectively with the first travelling gear,The corresponding engagement of the second travelling gear and the 3rd travelling gear;

The plurality of cam includes at least one axle center stationary cam and a shift control cam; This at least one axle centerStationary cam is fixed in this driving axle center and with this driving axle center interlock and rotates; This shift control cam is with oneMode that can relative sliding is sheathed in driving axle center; In an outer portion of this at least one axle center stationary camBe provided with multiple cam bits that can force shift ratchet and lean projection slippage; In shift control cam one outsideRing portion is provided with multiple projections that lean, and is provided with multiple inner fovea parts in an internal ring portion of shift control cam;

The plurality of axle center ratchet includes one first axle center ratchet, one second axle center ratchet and one the 3rd axle center sour jujubePawl; Each axle center ratchet comprises respectively this brake tooth and a teeth change, and the brake tooth of each axle center ratchet with cutChanging tooth is synchronously to switch between this retracted position and this jack-up position; The brake tooth of this first axle center ratchetPosition is corresponding to the internal ring portion of this first travelling gear, the position of the brake tooth of this second axle center ratchet corresponding toThe internal ring portion of this second travelling gear, and the position of the brake tooth of the 3rd axle center ratchet passes corresponding to the 3rdThe internal ring portion of moving gear; The position of the teeth change of each axle center ratchet is all corresponding in this shift control camRing portion place, when the position of one of them inner fovea part of this shift control cam is corresponding to one of them axle center ratchetThe position of teeth change time, it is corresponding that the teeth change of this corresponding axle center ratchet can head into this teeth changeIn this inner fovea part, and then also synchronous jack-up and switch to this jack-up position of the brake tooth that makes this corresponding axle center ratchetPut; Relatively, when the position of the teeth change of one of them axle center ratchet there is no the position that corresponds to arbitrary inner fovea partWhile putting, this axle center ratchet is in this retracted position;

This at least one shift control ratchet can switch on a slippage position and and support between position; And shouldThe position of at least one shift control ratchet is corresponding to outer portion and this shift control of this at least one axle center stationary camThe outer portion of cam processed; This at least one shift control ratchet is subject to the multiple protruding of this at least one axle center stationary camTake turns the Effect of Rotation of piece and switch on this slippage position and support between position, and, when at least one shift controlRatchet processed is positioned at this while supporting position, and this at least one shift control ratchet can be supported this shift control camLean projection, in the time that at least one shift control ratchet is positioned at this slippage position, can not support this shiftControl the projection that leans of cam.

The described multistage shift internal speed changer of stepping on, wherein:

The plurality of change-speed gearing includes a first stud gear, a second stud gear and one the 3rd gear teethWheel, this first stud gear, this second stud gear and the 3rd change-speed gearing respectively with the first travelling gear,The corresponding engagement of the second travelling gear and the 3rd travelling gear;

It is solid that the plurality of cam includes one first axle center stationary cam, a shift control cam and one second axle centerDetermine cam; This first axle center stationary cam and the second axle center stationary cam be fixed in this driving axle center and with thisThe interlock rotation of interlock axle center; This shift control cam with one can relative sliding mode be sheathed on driving axle centerOn; An outer portion in the first axle center stationary cam and the second axle center stationary cam is respectively provided with and can forces respectivelyShift ratchet with lean multiple cam bits of projection slippage, and the first axle center stationary cam and the second axle center are fixedMultiple cam bits of cam have a phase difference in direction of rotation; An outer portion in shift control cam is establishedThere are multiple projections that lean, and are provided with multiple inner fovea parts in an internal ring portion of shift control cam;

The plurality of axle center ratchet includes one first axle center ratchet, one second axle center ratchet and one the 3rd axle center sour jujubePawl; Each axle center ratchet comprises respectively this brake tooth and a teeth change, and the brake tooth of each axle center ratchet with cutChanging tooth is synchronously to switch between this retracted position and this jack-up position; The brake tooth of this first axle center ratchetPosition is corresponding to the internal ring portion of this first travelling gear, the position of the brake tooth of this second axle center ratchet corresponding toThe internal ring portion of this second travelling gear, and the position of the brake tooth of the 3rd axle center ratchet passes corresponding to the 3rdThe internal ring portion of moving gear; The position of the teeth change of each axle center ratchet is all corresponding in this shift control camRing portion place, when the position of one of them inner fovea part of this shift control cam is corresponding to one of them axle center ratchetThe position of teeth change time, the teeth change of this corresponding axle center ratchet can head into its corresponding this indentIn portion, and then also synchronous jack-up and switch to this jack-up position of the brake tooth that makes this corresponding axle center ratchet; PhaseOver the ground, in the time that the position of the teeth change of one of them axle center ratchet there is no the position that corresponds to arbitrary inner fovea part,This axle center ratchet is in this retracted position;

This at least one shift control ratchet includes one first shift control ratchet and one second shift control sour jujubePawl, and this first shift control ratchet and the second shift control ratchet all can switch on respectively a slippage positionAnd one support between position; The position of this first shift control ratchet is corresponding to this first axle center stationary camOuter portion and the outer portion of this shift control cam, and the position of this second shift control ratchet is corresponding to thisThe outer portion of the outer portion of the second axle center stationary cam and this shift control cam; This first shift control ratchetBe subject to this first axle center stationary cam multiple cam bits Effect of Rotation and switch on this slippage position with supportBetween position, and, in the time that the first shift control ratchet is positioned at this and supports position, this first shift control sour jujubePawl can be supported the projection that leans of this shift control cam, is positioned at this slippage and work as the first shift control ratchet, can not support the projection that leans of this shift control cam when the position; This second shift control ratchet is subject to thisThe Effect of Rotation of multiple cam bits of the second axle center stationary cam and switch on this slippage position with support position itBetween, and in the time that the second shift control ratchet is positioned at this and supports position, this second shift control ratchet canSupport the projection that leans of this shift control cam, and in the time that the second shift control ratchet is positioned at this slippage positionCan not support the projection that leans of this shift control cam.

The described multistage shift internal speed changer of stepping on, wherein:

In this first travelling gear, the second travelling gear and the 3rd travelling gear, have two travelling gears at leastThe number of teeth is not identical;

In this first stud gear, second stud gear and the 3rd change-speed gearing, have two change-speed gearings at leastThe number of teeth is not identical;

The quantity of multiple cam bits of this first axle center stationary cam and the second axle center stationary cam is threeIndividual, and multiple quantity that lean projection of this shift control cam are six, and shift control camThe quantity of multiple inner fovea parts is two.

The described multistage shift internal speed changer of stepping on, wherein:

The described multistage shift internal speed changer of stepping on is arranged at a bicycle with two cranks and a gear pieceUpper, wherein, this power intake is exactly this two crank, and this clutch end is exactly this gear piece; And,This is stepped on multistage shift internal speed changer and more includes:

One first holder and one second holder, lay respectively at the two ends of this driving axle center and be fixed on this certainlyOne vehicle frame of driving is respectively provided with respectively an opening and a variable-speed shaft on this first holder and the second holderSeat; This speed change axle center is arranged between this first holder and the speed change axle bed of the second holder, and in this changeTwo ends, speed axle center are respectively provided with respectively a needle roller corresponding to the speed change axle bed place of this first holder and the second holderBearing, can rotate with respect to the first holder and the second holder speed change axle center;

One ball collar, is placed in the opening of this first holder; This transmission pedestal is set in this ball collarTransmission pedestal can be rotated with respect to the first holder, and one end of this transmission pedestal protrude out first fixingSeat is compared with the outside away from the second holder;

One gear piece holder, is arranged at the first holder compared with the side away from the second holder and is incorporated into this biographyMoving pedestal is also subject to this transmission pedestal to drive rotation; Wherein, this gear piece is fixed on gear piece holder; And,

At least one support column, is incorporated between the first holder and the second holder, in order to strengthen structural strength;

Wherein, this driving axle center is can counterrotating mode being set in this transmission pedestal; This power transmission shaftOne end of the heart protrudes out outer and this driving axle center other end of the opening of this first holder and protrudes out that this is second solidOutside the opening of reservation, and the two ends of this driving axle center are incorporated into respectively this two crank; In addition, in this biographyThe moving axis heart is arranged with a pearl bowl and beautiful a signature corresponding to the opening part of this second holder.

The present invention also provides one to step on multistage shift internal speed changer, includes:

One driving axle center, its be incorporated into a power intake and be subject to the driving of this power intake and just carry out,Return motion, in this driving axle center and be provided with along one axle center extend at least one accommodation seat;

One shift cam group unit, it includes multiple cams and at least one axle center control element; The plurality ofCam and this at least one axle center control element are sheathed in this driving axle center, and this at least one axle center control elementWith driving axle center interlock synchronous rotary; This at least one axle center control element be contained in this at least one accommodation seat andBe subject to the control of rotation of the plurality of cam and switching position; The plurality of cam can rely on one of this driving axle centerReturn motion drives this at least one axle center control element to carry out the switching of position and then determine the plurality of driving cogOne of them travelling gear in wheel can be transmitted axle center in forward time institute driven rotary; And,

One transmission pedestal, is incorporated between a clutch end and the plurality of travelling gear, and this transmission pedestal is subject toThe driven rotary of the plurality of travelling gear and then the rotary power during by forward export this clutch end to; ItsIn, by this driving axle center in this travelling gear collocation this that engage corresponding to its institute of forward time institute driven rotaryA wherein change-speed gearing in multiple change-speed gearings can determine the rotary speed of this transmission pedestal, therefore, and quiltWhen the travelling gear of this driving axle center institute driven rotary changes, the rotary speed of this transmission pedestal also can change.

The described multistage shift internal speed changer of stepping on, wherein:

This at least one axle center control element is ratchet or key.

The described multistage shift internal speed changer of stepping on, wherein:

The plurality of cam includes: at least one axle center stationary cam and a shift control cam; This shift controlCam can counterrotating mode be sheathed in driving axle center and interlock is controlled unit in this at least one axle center with onePart, is used for controlling this at least one axle center control element and carries out the switching of position.

The described multistage shift internal speed changer of stepping on, wherein:

Be provided with at least one arcuation chute in this at least one axle center stationary cam, and, in this shift controlOn cam and corresponding to the position of each arcuation chute, be respectively provided with respectively at least one round hole, and inIn each this circle hole, be respectively arranged with a steel ball.

The invention has the beneficial effects as follows: can rely on foot-operated driving crank to reverse to carry out the change of at least three sections of gearsShelves operations, and simple with mechanism, cost is low and the shift operant response advantage such as certain rapidly.

Brief description of the drawings

It is quick-fried in the solid at the first visual angle that Fig. 1 is that the present invention steps on a preferred embodiment of multistage shift internal speed changerFried view;

Fig. 2 is that the present invention steps on the preferred embodiment of multistage shift internal speed changer in the solid blast at the second visual angleView;

Fig. 3 is that the preferred embodiment that the present invention steps on multistage shift internal speed changer is looked in the right side under assembled stateFigure;

Fig. 4 is the A-A cross section view shown in Fig. 3 (containing crank and gear piece);

Fig. 5 be the present invention step on the three-dimensional view of multistage shift internal speed changer under assembled state (containing pearl bowl,Beautiful signature and the second holder);

Fig. 6 A, 6B and 6C be respectively of the present invention step on multistage shift internal speed changer first, second andThe side view of three travelling gears;

Fig. 7 A, 7B and 7C are respectively that the first axle center of stepping on multistage shift internal speed changer of the present invention is fixed protrudingThe side view of wheel, shift control cam and the second axle center stationary cam;

Fig. 8 A, 8B and 8C be respectively of the present invention step on multistage shift internal speed changer first, second andThe three-dimensional view of three axle center ratchets;

Fig. 9 A, 9B and 9C are respectively that the first axle center of stepping on multistage shift internal speed changer of the present invention is fixed protrudingThe side view of another embodiment of wheel, shift control cam and the second axle center stationary cam;

Figure 10 is by the first axle center stationary cam shown in Fig. 9 A, 9B and 9C, shift control camAssembled view (not containing steel ball) while being sheathed in driving axle center with the second axle center stationary cam.

Description of reference numerals: the 1-multistage shift internal speed changer of stepping on of the present invention; 10-driving axle center; 101,102,103-ratchet accommodation seat; 20-speed change axle center; 30-gear teeth wheels unit; 31-the first travelling gear; 311,321,331-internal ring portion; 312,322,332-is against dimple; 313-fixture block; 32-the second travelling gear; 33-The 3rd travelling gear; 34-first stud gear; 35-second stud gear; 36-the 3rd change-speed gearing; 40-Shift cam group unit; 41,41a-the first axle center stationary cam; 411,431-cam bit; 42,42a-becomesShelves are controlled cam; 415,435-chute; 421-leans projection; 422-inner fovea part; 425-circle hole; 426-steel ball43,43a-the second axle center stationary cam; 44-the first axle center ratchet; 45-the second axle center ratchet; 46-the 3rd axle centerRatchet; 441,451,461-brake tooth; 442,452,462-teeth change; 47-the first shift control ratchet;48-the second shift control ratchet; 50-transmission pedestal; 501-draw-in groove; 61-the first holder; 611,621-opensMouthful; 612,622-speed change axle bed; 62-the second holder; 63,64-needle bearing; 65-ball collar; 66-Gear piece holder; 67-support column; 681-pearl bowl; 682-is beautiful to be given as security; 91-crank; 92-gear piece.

Detailed description of the invention

For making your auditor have further cognitive and understanding to feature of the present invention, object and function,Hereby coordinate accompanying drawing to be described in detail as follows:

Refer to Fig. 1 to Fig. 8 C, it has disclosed the better of multistage shift internal speed changer 1 that step on of the present inventionEmbodiment. Wherein, Fig. 1 be the present invention step on multistage shift internal speed changer 1 a preferred embodiment in firstThe three-dimensional explosive view at visual angle; Fig. 2 be the present invention's preferred embodiment of stepping on multistage shift internal speed changer 1 inThe three-dimensional explosive view at the second visual angle; Fig. 3 is the better enforcement that the present invention steps on multistage shift internal speed changer 1The right side view of example under assembled state; Fig. 4 be the A-A cross section view shown in Fig. 3 (containing crank 91 andGear piece 92); Fig. 5 is that the present invention steps on the three-dimensional view of multistage shift internal speed changer 1 under assembled state (noContaining pearl bowl 681, beautiful signature 682 and the second holder); Fig. 6 A, 6B and 6C are respectively of the present invention stepping onThe side view of first, second of multistage shift internal speed changer 1 and the 3rd travelling gear 31,32,33; Fig. 7 A,7B and 7C are respectively that the first stationary cam 41, the axle center of stepping on multistage shift internal speed changer of the present invention fixedThe side view of cam 42 and the second stationary cam 43; Fig. 8 A, 8B and 8C be respectively of the present invention step on manyThe three-dimensional view of first, second of section shift internal speed changer and the 3rd axle center ratchet 44,45,46.

As shown in Figures 1 to 5, a preferred embodiment of stepping on multistage shift internal speed changer 1 of the present invention,The interior (not shown) of one vehicle frame that can be installed in bicycle, is especially applicable to being installed in for group establishing pinStep on the Five-way tube position of the vehicle frame of the axle of crank 91 (Crank). Of the present invention stepping in multistage shift becomesSpeed device 1 can by foot-operated driving crank 91 reverse (namely stepping on pedal) carry out at least three sections of speed changesShift operation. In the present embodiment, this is stepped on multistage shift internal speed changer 1 and includes: a driving axle center10, a speed change axle center 20, a gear teeth wheels unit 30, a shift cam group unit 40, a transmission pedestal50, one first holder 61, one second holder 62, two needle bearings 63,64, a ball collar 65,One gear piece holder 66, at least one support column 67, a pearl bowl 681 and a beautiful signature 682.

This driving axle center 10 be incorporated into a power intake and can be subject to the driving of this power intake and just carry out,Return motion. In the present embodiment, this power intake is exactly two cranks 91 of bicycle. In this power transmission shaftOn the outer surface of the heart 10 and be provided with along one axle center extend multiple ratchet accommodation seats 101,102,103, andBe provided with respectively and the square toes portion of crank 91 in conjunction with use in two ends of driving axle center 10. In the present embodiment,The plurality of ratchet accommodation seat has comprised one first ratchet accommodation seat 101, one second ratchet accommodation seat 102 andThe 3rd ratchet accommodation seat 103. Each ratchet accommodation seat 101,102,103 is axially extended long and narrow shallow ridges shape knotStructure, and roughly equidistant space of each ratchet accommodation seat 101,102,103.

And the be separated by preset distance setting parallel with this driving axle center 10 of this speed change axle center 20. This change-speed gearingGroup unit 30 includes multiple travelling gears 31,32,33 and multiple change-speed gearing 34,35,36. ShouldMultiple travelling gears 31,32,33 are sheathed in driving axle center 10, and the plurality of change-speed gearing 34,35,36 be sheathed on this speed change axle center 20 and respectively with the plurality of travelling gear 31,32,33 corresponding engagements.

Refer to Fig. 1, Fig. 2 and Fig. 4 and Fig. 6 A that arranges in pairs or groups, Fig. 6 B and Fig. 6 C. In the present embodiment, shouldMultiple travelling gears include one first travelling gear 31, one second travelling gear 32 and one the 3rd driving cogWheel 33. This first, second and the 3rd travelling gear 31,32,33 threes between be not fixed together andCan asynchronous rotation. This first travelling gear 31 relies on some fixture blocks 313 to be incorporated into this transmission pedestalIn 50 draw-in groove 501, make the first travelling gear 31 and transmission pedestal 50 interlocks, therefore this transmission pedestal 50Directly driven and synchronous rotary by this first travelling gear 31. And, in each travelling gear 31,32,33An internal ring portion 311,321,331 be respectively provided with respectively can unidirectional slippage multiple against dimple 312,322,332. The multiple of each travelling gear 31,32,33 can be corresponding at it against dimple 312,322,332Brake tooth 441,451,461 is positioned at jack-up position and in the time of driving axle center 10 forward, is subject to the plurality of brake tooth441,451,461 supporting of one of them and transmission, and in the time that driving axle center 10 is reversed, make each brake tooth 441,451,461 not transmissions of slippage. The plurality of change-speed gearing includes a first stud gear 34, one second speed changeGear 35 and one the 3rd change-speed gearing 36, its respectively with first, second and the 3rd travelling gear 31,32,33 corresponding engagements. In the present embodiment, this first, second and the 3rd change-speed gearing 34,35,36 be allWith speed change axle center 20 synchronous rotaries. And, this first, second and the 3rd travelling gear 31,32,33 inHave at least the number of teeth of two travelling gears not identical, and this first, second and the 3rd change-speed gearing 34,35,In 36, have at least the number of teeth of two change-speed gearings not identical. In the present embodiment, this second travelling gear 32The number of teeth is greater than the first travelling gear 31, and the number of teeth of the first travelling gear 31 is greater than again the 3rd travelling gear 33The number of teeth; In addition, the number of teeth of the 3rd change-speed gearing 36 is greater than first stud gear 34, and the first gear teethThe number of teeth of wheel 34 is greater than again the number of teeth of second stud gear 35.

Refer to Fig. 1 to Fig. 5, this shift cam group unit 40 includes multiple cams 41,42,43, manyIndividual axle center ratchet 44,45,46 and at least one shift control ratchet 47,48. The plurality of cam 41,42,43 are sheathed in this driving axle center 10 with multiple axle center ratchet 44,45,46, and the plurality of axle center ratchet 44,45,46 and driving axle center 10 interlock synchronous rotaries. The plurality of axle center ratchet 44,45,46 is contained in respectivelyIn multiple ratchet accommodation seats in this driving axle center 10 101,102,103 and can be subject to the plurality of cam 41,42,The control of 43 rotation and switching on individually between a retracted position and a jack-up position, therefore also can be claimedAs " axle center control element ", mean to be arranged on the control element on axle center. This at least one shift control sour jujubePawl 47,48 abuts in a side of multiple cams 41,42,43, and can be corresponding to driving axle center 10 anti-Transhipment is moving and support the plurality of cam 41,42,43 and make it carry out the rotation fortune with respect to this driving axle center 10Move and then control the position handover operation of the plurality of axle center ratchet 44,45,46. Wherein, the plurality of axle center sour jujubePawl 44,45,46 has respectively a brake tooth 441,451,461, and each axle center ratchet 44,45,46The position of brake tooth 441,451,461 just corresponds respectively to its in the plurality of travelling gear 31,32,33In the internal ring portion 311,321,331 of a travelling gear 31,32,33. When a certain axle center ratchet 44 (or 45,Or 46) while being positioned at this jack-up position, the brake tooth 441 of the axle center ratchet 44 of this jack-up (or 45 or 46)(or 451 or 461) will support the interior ring of its corresponding travelling gear 31 (or 32 or 33)In portion 311 (or 321 or 331) against dimple 312 (or 322 or 332) and will be transmitted axleThe heart 10 drives and rotates in the time of forward, is positioned at the corresponding biography of axle center ratchet of this retracted position as for otherMoving gear will can not be transmitted axle center 10 and directly drive in the time of forward, but likely can be first through multipleAfter the transmission of change-speed gearing 34,35,36 and speed change, by the first travelling gear 31, rotary power is sent to againTransmission pedestal 50.

For instance, in the time that the first axle center ratchet 44 is positioned at this jack-up position, now other two axle center ratchets 45,46 all can be positioned at retracted position; Now, driving axle center 10 will directly drive the first travelling gear in the time of forward31, and then send rotary power to gear piece holder 66 via transmission pedestal 50, meanwhile, other two biographiesMoving gear 32,33 can be not drive state. And in the time that the second axle center ratchet 45 is positioned at this jack-up position, thisTime other two axle center ratchets 44,46 all can be positioned at retracted position; Now, driving axle center 10 will in the time of forwardCan be directly drive the second travelling gear 32, and the second travelling gear 32 understand by power send to engage with it theTwo change-speed gearings 35, then pass to power and second stud gear 35 synchronous rotaries by speed change axle center 20First stud gear 34, then rotary power is sent to the first driving cog engaging with first stud gear 34Wheel 31, and then send rotary power to gear piece holder 66 via transmission pedestal 50, meanwhile, the 3rdTravelling gear 33 can be not drive state. In addition, in the time that the 3rd axle center ratchet 46 is positioned at this jack-up position,Now other two axle center ratchets 44,45 all can be positioned at retracted position; Now, driving axle center 10 is in the time of forwardWill directly drive the 3rd travelling gear 33, and the 3rd travelling gear 33 can send power to and to engage with itThe 3rd change-speed gearing 36, is then passed to power with the 3rd change-speed gearing 36 and synchronizes and revolve by speed change axle center 20The first stud gear 34 turning, then rotary power is sent to first transmission of engaging with first stud gear 34Gear 31, and then send rotary power to gear piece holder 66 via transmission pedestal 50, meanwhile, theTwo travelling gears 32 can be not drive state. Thus, can reach the reversion action by driving axle center 10Control the rotating speed that a certain axle center ratchet 44,45,46 switches to this jack-up position and then changes outputting powerThree sections of speed changing functions.

Refer to Fig. 1, Fig. 2 and Fig. 7 A that arranges in pairs or groups, Fig. 7 B and Fig. 7 C. In the present embodiment, the plurality of protrudingWheel includes one first axle center stationary cam 41, a shift control cam 42 and one second axle center stationary cam43. This first and second axle center stationary cam 41,43 is fixed in this driving axle center 10 and with its interlock and revolvesTurn. This shift control cam 42 with one can relative sliding mode be sheathed in driving axle center 10 and be sandwichedBetween first and second axle center stationary cam 41,43. In first and second axle center stationary cam 41,43An outer portion be respectively provided with respectively and can order about shift control ratchet 47,48 and make it to depart from and lean projection 421 and nibbleThe multiple cam bits 411,431 that close, and, multiple cams of first and second axle center stationary cam 41,43Piece 411,431 has a phase difference in direction of rotation. An outer portion in shift control cam 42 is provided withMultiple projections 421 that lean, and be provided with multiple inner fovea parts 422 in an internal ring portion of shift control cam 42. InIn the present embodiment, both multiple cam bits 411,431 of this first and second axle center stationary cam 41,43Quantity be three, and multiple quantity that lean projection 421 of this shift control cam 42 are six,And the quantity of multiple inner fovea parts 422 of shift control cam 42 is two.

Refer to Fig. 1, Fig. 2 and Fig. 7 A that arranges in pairs or groups, Fig. 7 B and Fig. 7 C. In the present embodiment, the plurality of axleHeart ratchet includes one first axle center ratchet 44, one second axle center ratchet 45 and one the 3rd axle center ratchet 46.Each axle center ratchet 44,45,46 comprise respectively this brake tooth 441,451,461 and a teeth change 442,452,462, and the brake tooth 441 (or 451 or 461) of indivedual axle center ratchets 44 (or 45 or 46)With teeth change 442 (or 452 or 462) both be synchronize switch on this retracted position and this jack-up position itBetween. The position of the brake tooth 441 of this first axle center ratchet 44 is corresponding to the interior ring of this first travelling gear 31Portion 311, the position of the brake tooth 451 of this second axle center ratchet 45 is corresponding in this second travelling gear 32Ring portion 321, and the position of the brake tooth 461 of the 3rd axle center ratchet 46 is corresponding to the 3rd travelling gear 33Internal ring portion 331. In addition the position of the teeth change 442,452,462 of each axle center ratchet 44,45,46,All the internal ring portion places corresponding to this shift control cam 42, when certain of this shift control cam 42 internal ring portionsThe position of one inner fovea part 422 just corresponding to the teeth change 442 of certain axle center ratchet 44 (or 45 or 46) (or452 or 462) when the position, the teeth change 442 of this corresponding axle center ratchet 44 (or 45 or 46)(or 452 or 462) can head in its corresponding this inner fovea part 422 and be lifted to this jack-up position,And then make the brake tooth 441 (or 451 or 461) of this corresponding axle center ratchet 44 (or 45 or 46)Also synchronous jack-up and switch to this jack-up position. Relatively, when certain axle center ratchet 44 (or 45 or 46)When the position of teeth change 442 (or 452 or 462) there is no the position that corresponds to arbitrary inner fovea part 422,This axle center ratchet 44 (or 45 or 46) is in this retracted position. This first, second and the 3rd axle center sour jujubeOn pawl 44,45,46, be respectively provided with respectively a flexible member (such as torque spring etc.) and can make first,The two and the 3rd axle center ratchet 44,45,46 has the trend that switches to this jack-up position in the time not affected by external force.

This at least one shift control ratchet includes one first shift control ratchet 47 and one second shift controlRatchet 48, and this first and second shift control ratchet 47,48 all can switch on respectively a slippage position andOne supports between position. The position of this first shift control ratchet 47 is corresponding to this first axle center stationary cam 41Outer portion and the outer portion of this shift control cam 42, and the position pair of this second shift control ratchet 48Should be in the outer portion of the outer portion of this second axle center stationary cam 43 and this shift control cam 42. This is first years oldShift control ratchet 47 is subject to the rotation of multiple cam bits 411 of these the first axle center stationary cam 41 outer portionDrive and switch on this slippage position and support between position, and, when the first shift control ratchet 47 is positioned atWhen this is supported position and driving axle center 10 and reverses, this first shift control ratchet 47 can be supported this shift controlCam 42 processed wherein one lean projection 421; Be positioned at this slippage position and work as the first shift control ratchet 47What Shi Ze can not support this shift control cam 42 leans projection 421 because can mutual slippage. This second changeShelves control ratchet 48 is subject to the rotating band of multiple cam bits 431 of these the second axle center stationary cam 43 outer portionMove and switch on this slippage position and support between position, and, when the second shift control ratchet 48 is positioned at thisWhen supporting position and driving axle center 10 and reversing, this second shift control ratchet 48 can be supported this shift controlCam 42 wherein one lean projection 421; And in the time that the second shift control ratchet 48 is positioned at this slippage positionThat can not support this shift control cam 42 leans projection 421. In the present embodiment, this is first and years oldTwo shift control ratchet 47,48 setting parties are to identical, are all namely towards along this first and second axle centerThe protuberance direction of multiple cam bits 411,431 of stationary cam 41,43 protrudes out setting, so no matter firstWith the second axle center stationary cam the 41, the 43rd, forward or reverse all can slippage (in other words, be all namely courtProtrude out setting to the multiple directions that lean projection 421 that can support this shift control cam 42); And,On this first and second shift control ratchet 47,48, be respectively provided with respectively a flexible member (for example torque springDeng) can make first and second shift control ratchet 47,48 switch to this in the time not affected by external force to supportThe trend of position.

In the present embodiment, the set multiple cams of these first and second axle center stationary cam 41,43 outer portionPiece 411,431 can make driving axle center 10 in the time of forward, and first and second shift control ratchet 47,48 no matterIts position is all can be mutual with the projection 421 that respectively leans of shift control cam 42 supporting position or slippage positionPhase slippage state only just can make to be positioned at a certain shift control of supporting position in the time that driving axle center 10 is reversedRatchet 47 (or 48) removes to support a certain projection 421 that leans of shift control cam 42. And, also only haveSupported shift control cam 42 at a certain shift control ratchet 47 (or 48) a certain lean projection 421,And when driving axle center 10 continues again rotation one predetermined angular, this shift control ratchet 47 (or 48) just can goPromote shift control cam 42 and rotate, impel a certain inner fovea part 422 of shift control cam 42 internal ring portionsPosition displacement arrives the teeth change 442 (or 452 or 462) with certain axle center ratchet 44 (or 45 or 46)Corresponding position, and then reach the operation object of gear shift, speed change. In addition, each travelling gear 31,32,Multiple unidirectional slippage sides against dimple 312,322,332 that 33 internal ring portions 311,321,331 are provided withTo, be to make driving axle center 10 in when reversion, first, second and the 3rd axle center ratchet 44,45,46Its position be in jack-up position or retracted position all can with each travelling gear 31,32,33 respectively against recessedSeat 312,322,332 is mutual slippage state, only has when driving axle center 10 is during in forward, just can make to be positioned atThe brake tooth 441 (or 451 or 461) of a certain axle center ratchet 44 (or 45 or 46) of jack-up positionGo to support its corresponding travelling gear 31 (or 32 or 33) against dimple 312 (or 322 or332). In other words, when driving axle center 10 can only be carried out shifted operation in the time reversing, and only haveDriving axle center 10 in the time of forward, from the input power of driving axle center 10 just can via with travelling gear 31 phasesIn conjunction with transmission pedestal 50 export. In simple terms, in the shift control cam 42 shown in Fig. 7 B, in itThe inner fovea part 422 of ring portion is with respect to the rotary angle position of driving axle center 10, determined first, second andThe jack-up of the brake tooth 441 (or 451 or 461) of three axle center ratchets 44,45,46 or inside contract state. AndThe position of this inner fovea part 422 is to be joined by multiple cam bits 431 of the second axle center stationary cam 43 outer portionThe multiple relative positions that lean projection 421 and the first shift control ratchet 47 that close shift control cam 42 comeDetermine the shift pattern of left side crank 91, or also multiple cam bits 411 of the first axle center stationary cam 41Coordinate 421 to coordinate multiple relative positions that lean projection 421 and the second shift control ratchet 48 to decide right sideCrank 91 shift patterns. The relative position of this cooperation is to make the crank 91 can under ad-hoc location in order to reachPossesses the function of gear-change operation.

As shown in Figures 1 to 5, this transmission pedestal 50 is incorporated into a clutch end and the plurality of travelling gear31,, between 32,33, can be subject to the driven rotary of the first travelling gear 31 in the plurality of travelling gear and then incite somebody to actionRotary power when driving axle center 10 forward exports this clutch end to. In the present embodiment, this power is defeatedGoing out end is exactly this gear piece 92. As previously mentioned, by this travelling gear 31 of 10 driven rotary of this driving axle center(or 32 or 33) collocation with its wherein change-speed gearing 34 in the plurality of change-speed gearing of corresponding engagement(or 35 or 36) can determine the rotary speed of this transmission pedestal 50, therefore, and by this driving axle center 10In the time that the travelling gear 31,32,33 of forward time institute driven rotary changes, the rotation speed of this transmission pedestal 50Degree also can change, and then reaches the object of multistage speed change.

This first holder 61 and the second holder 62 lay respectively at the two ends of this driving axle center 10 and are fixingIn the contiguous crank of vehicle frame 91 places of this bicycle. On this first and second holder 61,62, respectively establish respectivelyThere are an opening 611,621 and a speed change axle bed 612,622. This speed change axle center 20 be arranged at this first andBetween two speed change axle beds 612,622 of two holders 61,62, and in these 20 two ends, speed change axle center corresponding toSpeed change axle bed 612,622 places of this first and second holder 61,62 be respectively provided with respectively this needle bearing 63,64, speed change axle center 20 can be rotated with respect to first and second holder 61,62. This ball collar 65 is accommodatingIn the opening 611 of this first holder 61. This transmission pedestal 50 is set in this ball collar 65 and makes transmissionPedestal 50 can rotate with respect to the first holder 61, and one end of this transmission pedestal 50 protrudes out first fixingSeat 61 is compared with the outside away from the second holder 62. This gear piece holder 66 is arranged at the first holder 61Away from the side of the second holder 62 and be incorporated into this transmission pedestal 50 and can be driven by it rotation. Wherein,This gear piece 92 is to be fixed on gear piece holder 66.

This at least one support column 67 is incorporated between first and second holder 61,62, in order to strengthen structureIntensity. In the present embodiment, the quantity of support column 67 is two, but can be also other quantity. This transmissionAxle center 10 is can counterrotating mode being set among this transmission pedestal 50. One end of this driving axle center 10The opening 611 that protrudes out this first holder 61 is outer and the other end protrudes out opening of this second holder 62Outside mouth 621, and the two ends of this driving axle center 10 are incorporated into respectively this two crank 91. In addition, in this biographyThe moving axis heart 10 is corresponding to opening 621 places of this second holder 62 and be arranged with a pearl bowl 681 and beautiful a signature682。

Above-described the present invention steps on the embodiment of multistage shift internal speed changer, is to be mainly arranged on transmissionRatchet (especially axle center ratchet 44,45,46) on axle center in set storage tank is used as axle center controlElement processed, and can rely on the position switching (for example jack-up position or retracted position) of ratchet to decide which biographyMoving gear can be transmitted axle center in forward time institute driven rotary, and then reaches the function of multistage speed change. But,In another embodiment, the multistage shift internal speed changer of stepping on of the present invention, also can use equally and be arranged onAt least one " key " in driving axle center in set storage tank replaces aforesaid ratchet to control as axle centerElement processed, can rely on the position of this at least one " key " (namely axle center control element) on axially equallySwitch, decide which travelling gear can be transmitted axle center in forward time institute driven rotary, and then can reach equallyTo the function of multistage speed change. And one be used as in the embodiment of axle center control element with at least one " key " at this,Multiple cam of the present invention can include: at least one axle center stationary cam and a shift control cam; This shiftControl cam with one can counterrotating mode be sheathed in driving axle center and interlock in this at least one " key " (alsoBe exactly axle center control element), and the design of cam face on this shift control cam is that can be used to control should" key " carries out the switching of the position of " axial displacement " in this driving axle center. As for, in the present embodimentThe element such as other elements such as speed change axle center, gear teeth wheels unit, transmission pedestal can use with frontState the same or similar technology of embodiment, so it will not go into details.

Refer to Fig. 9 A, Fig. 9 B, Fig. 9 C and Figure 10. Wherein, Fig. 9 A, Fig. 9 B, Fig. 9 C are respectivelyFor the first axle center stationary cam 41a, the shift control cam 42a that steps on multistage shift internal speed changer of the present inventionSide view with another embodiment of the second axle center stationary cam 43a. Figure 10 is that these a little first axle center are solidDetermine cam 41a, shift control cam 42a and the second axle center stationary cam 43a is sheathed in driving axle center 10Time assembled view (containing steel ball 426). The first axle center stationary cam 41a in the present embodiment, shiftControl the structure of cam 42a and the second axle center stationary cam 43a and function haply with Fig. 7 A, Fig. 7 B andSimilar shown in Fig. 7 C, its unique difference is: in first shown in Fig. 9 A, Fig. 9 B and Fig. 9 CAxle center stationary cam 41a with on the second axle center stationary cam 43a, be respectively provided with respectively three corresponding arcuations of positionChute 415,435; And arbitrary arcuation chute 415 of the first axle center stationary cam 41a is in a forward sideFront end is upwards just corresponding to the tail end of the corresponding arcuation chute 435 of the second axle center stationary cam 43a. ThisOutward, on shift control cam 42a and corresponding to the end positions place of each arcuation chute 415,435,Respectively be provided with respectively at least one round hole 425, and be respectively arranged with a steel ball 426 in each this circle hole 425.The diameter of this steel ball 426 is equivalent to or is slightly less than the internal diameter in this circle hole 425. In the present embodiment similarly,This first and second axle center stationary cam 41a, 43a are fixed in this driving axle center 10 and with its interlock and rotate;And this shift control cam 42a with one can relative sliding mode be sheathed in driving axle center 10 and be to be folded inBetween first and second axle center stationary cam 41a, 43a. In first and second axle center stationary cam 41a, 43aAn outer portion be respectively provided with respectively and can order about shift control ratchet 47,48 and make it to depart from and lean projection 421 and nibbleThe multiple cam bits 411,431 that close, and first and second axle center stationary cam 41a, 43a's is multiple protrudingWheel piece 411,431 has a phase difference in direction of rotation. An outer portion in shift control cam 42a is establishedThere are multiple projections 421 that lean, and are provided with multiple inner fovea parts 422 in an internal ring portion of shift control cam 42.

Due to, coordinating first, second and the 3rd axle center ratchet in the shift cam group unit 40 shown in Fig. 144, in the process of 45,46 starts, when arbitrary axle center ratchet 44,45,46 is from opening (jack-up) to closedAngle when (inside contracting), can there is range of instability in this section, and this range of instability likely can produce neutral gearPhenomenon. In order to get rid of this range of instability, the present invention is especially in Fig. 9 A, Fig. 9 B, Fig. 9 C and Figure 10 instituteIn the embodiment showing, rely on the plurality of arcuation chute 415,435 and be arranged in the steel in the plurality of round hole 425The cooperation of pearl 426 is organized and is formed an extra steel ball mechanism. When shift control cam 42a with respect to first withThe second axle center stationary cam 41a, 43a slide time, the plurality of steel ball 426 can the plurality of arcuation chute 415,435 interior slips, until arrive after chute 415,435 tail ends, the plurality of steel ball 426 just can be against living firstWith the second axle center stationary cam 41a, 43a. Again, when shift control cam 42a continues revolution, steel ball 426Just can be broken through to chute 435 by arcuation chute 415, and another steel ball 426 can be broken through extremely by arcuation chute 435Chute 415, so, will make steel ball 426 and the mutual push effect of chute 415,435. This pushes prominent alternatelyBroken process can subaxial ratchet 44,45,46 be done and is opened fast closed action. Make shift control cam 42aCannot be stabilized among this process of pushing, escape inner arbitrary axle center ratchet 44,45,46 and open and closeThe linking point closing, and then exempted the fuzzy interval of switching shift process. Thus, be switching at gearProcess in just can avoid ratchet to clash phenomenon, not only in gear shift, no longer include neutral gear phenomenon, and alsoThe feedback device function of gear shift whether when thering is user and can feeling to step on after gear shift.

As previously mentioned, in the present embodiment, 425 positions, the plurality of round hole, need be with respect to shift control camThe feature of the set the plurality of inner fovea part 422 of 42 internal ring portions, so that first, second and the 3rd axle center ratchet 44,45,46 can successfully be carried out and be opened in correct angle (this angle is the position corresponding to inner fovea part 422)Open or closed operation. And chute 415,435 positions need be with respect to the position of these circular holes 425,Make first, second and the 3rd axle center ratchet 44,45,46 cannot be positioned to open and closed gearshift procedureRegion.

Only above-described embodiment shall not be applied to that restriction is of the present invention can range of application, protection model of the present inventionEnclosing should be with claim content institute's definition techniques spirit of the present invention and the impartial scope being included that changes thereofBe main person. The equalization of generally doing according to the present patent application the scope of the claims changes and modifies and will not lose thisBright main idea place does not also depart from the spirit and scope of the present invention, and former capital should be considered as further reality of the present inventionExecute situation.

Claims

1. step on a multistage shift internal speed changer, it is characterized in that, include:

2. the multistage shift internal speed changer of stepping on as claimed in claim 1, is characterized in that:

3. the multistage shift internal speed changer of stepping on as claimed in claim 1, is characterized in that:

4. the multistage shift internal speed changer of stepping on as claimed in claim 1, is characterized in that:

5. the multistage shift internal speed changer of stepping on as claimed in claim 4, is characterized in that:

6. the multistage shift internal speed changer of stepping on as claimed in claim 4, is characterized in that: described stepping on is manySection shift internal speed changer is arranged on a bicycle with two cranks and a gear piece, and wherein, this power is defeatedEntering end is exactly this two crank, and this clutch end is exactly this gear piece; And this is stepped in multistage shift and becomesSpeed device more includes:

7. step on a multistage shift internal speed changer, it is characterized in that, include:

One transmission pedestal, is incorporated between a clutch end and the plurality of travelling gear, and this transmission pedestal is subject toThe driven rotary of the plurality of travelling gear and then the rotary power during by forward export this clutch end to; ItsIn, by this driving axle center in this travelling gear collocation this that engage corresponding to its institute of forward time institute driven rotaryA wherein change-speed gearing in multiple change-speed gearings can determine the rotary speed of this transmission pedestal, therefore, and quiltWhen the travelling gear of this driving axle center institute driven rotary changes, the rotary speed of this transmission pedestal also can change;

Wherein this at least one axle center control element is ratchet or key;

The plurality of cam includes: at least one axle center stationary cam and a shift control cam; This shift controlCam can counterrotating mode be sheathed in driving axle center and interlock is controlled unit in this at least one axle center with onePart, is used for controlling this at least one axle center control element and carries out the switching of position;