CN1029102C - Automatic speed-varying system and speed-varying method thereof - Google Patents

Abstract

The present invention relates to an automatic speed changing system device and a method thereof. The automatic speed changing system device comprises a first speed changing device, a first set of planetary gear trains, a ratchet wheel, a second speed changing device and at least one second set of planetary gear trains, wherein the first speed changing device is arranged on a driving rotary device, such as a bicycle pedal and a driving chain wheel thereof; the first set of planetary gear trains and the ratchet wheel can initially change the speed of the driving rotary device by means of external force; the second speed changing device is arranged on a driven rotary device, for example, a driven chain wheel arranged on the back wheel of a bicycle is driven by the driving rotary device; the second set of planetary gear trains is coupled with the driven chain wheel by means of at least one centrifugal coupler so as to drive the driven rotary device to automatically change speed at different rotary speeds.

Description

Automatic speed-varying system and speed-varying method thereof

The present invention relates to automatic shift device.

The change-speed box of commonly using, for example more than the bicycle section transmission system comprise be provided with on the free axis a plurality of diameters different sprocket wheel, borrow a shift mechanism will be engaged in chain on a certain sprocket wheel and stir to make to change and be inserted in another sprocket wheel, cooperate a tension force miniature gears to do multistage variable speed operation person with this chain of folding and unfolding.Only the change-speed box commonly used of this kind has following all shortcomings:

1. though have most sprocket wheels, only use two, three tool sprocket wheels in the only actual use operation, different many sprocket wheels do to cushion the inconvenience that speed change increases installation, use and maintenance on foot more.

2. when a sprocket wheel skipped to another sprocket wheel speed change, chain leaves this sprocket wheel influenced the moving puzzlement of changeing and often taking off chain that normal foot is stepped on action and car.

3. depend on diameter minimum and maximum sprocket wheel with dead slow the most at a high speed, but the diameter between maximum and minimum sprocket wheel is more limited than fixing, causes the variator ratio range of bicycle limited.

4. the pin jumping car transmission system of commonly using utilizes staff to dial the control speed change and there is no " automatically " speed changing function, and the influence driving diverts one's attention to promote the driving facility.Though known internal-combustion engine vehicle has automatic shift device in addition, that is made of oil sector, the structure bulky complex, and the cost costliness, maintenance difficult more can't be suitable for the light facility as bicycle.

In view of this this case contriver is to add the research innovation, discloses the present invention's novel automatic speed-changing system, wishes energy centering state bicycle, steam turbine car or other power transmission industry facility and contributes to some extent.

The present invention's purpose aims to provide a kind of automatic speed-changing system, it comprises: one first transmission system is located at the driving rotational device, and for example bicycle pedal and drive sprocket thereof include first planetary gear train and a ratchet, can be with the speed person of this driving rotational device of the elementary change of external force, and one second transmission system be located at a driven turning gear for example a driven sprocket be located at and be the above-mentioned driving rotational device person of being turned on the bicycle trailing wheel, at least one second planetary gear train is contained in system, borrow at least one tool centrifugal coupler with this driven sprocket that coincide in order to do this driven turning gear automatic speed changing person of order.

The objective of the invention is to reach by following characteristics of the present invention, promptly this first transmission system comprises: a planet train of gears contains one and drives sun gear and borrow the sub-concentric ring of a primary shaft ratchet and pawl this axle drive shaft person that is coupled pivotally, and one group of above drivings planetary wheel this sun gear and identical that coincide respectively one of is located on the internal gear dish excircle axle sleeve person that internal gear person internal gear dish then is connected to axle drive shaft; One first sprocket wheel contains a central bearing and is rotatably connected on the axle, most sprockets are located at coupling one chain drive-belt person on the circumference of sprocket wheel, and plural number the right ratchet radially, face outside the sprocket wheel is located on arc or cycloidal ground and the sprocket wheel the inside is inwardly stretched and established plural number and prop up the gear pin to spin the planetary wheel person; Two driving ratchet means contain its diameter of a wheel disc and approximate the first sprocket wheel person; Plural number left side ratchet radially, arc forms cycloidal ground and be located at ratchet person on operationally identical first sprocket wheel in the inside of wheel disc; Be hubbed at the middle body and the identical person of second ratchet that is fixed in axle drive shaft of wheel disc, and a concentric ring bead is located at circumference outside the wheel disc one group of above claw concentric ring; And one arrangement of clutch contain that a U type fastener overlaps pivotally should the concentric ring bead of escapement with this escapement of slippage with the person that coincide of the ratchet with second chain.

The present invention's desirable entity can by following specification sheets cooperate appended all drawings and be able to distinct it.

The simple declaration of drawing:

Fig. 1 is the scheme drawing of expression the present invention first transmission system.

Fig. 2 is the lateral plan that the present invention analyses and observe from the 2-2 of Fig. 1 direction.

Fig. 3 is the scheme drawing of analysing and observe from the 3-3 of Fig. 1 direction.

Fig. 4 is the driving pawl set-up diagram of analysing and observe from the 4-4 of Fig. 1 direction.

Fig. 5 shows the location scheme drawing of this escapement on the present invention's one axle drive shaft.

Fig. 6 represents the present invention's second transmission system.

Fig. 7 is the present invention's second sprocket wheel.

Scheme drawing when Fig. 8 dissociates for centrifugal coupler of the present invention.

The scheme drawing that Fig. 9 coincide for this centrifugal coupler for the present invention.

Figure 10 is the part transparent view of this centrifugal coupler and a support ring.

Consult Fig. 1 and 6, the present invention includes: it is connected with in an actuating device that can be axle drive shaft (10) or other drive-systems person of a bicycle pedal (11) one first transmission system (1), and at least one second transmission system (3) is connected with on the hunting gear that this actuating device of Yu Yiwei turned, this hunting gear can be second sprocket wheel (21), the back wheels of vehicle that is circled round (4) is via this axle drive shaft (10) and first sprocket wheel (15) person of turning.

As Fig. 1 to 5 those shown, the present invention's first transmission system (1) comprising: a planet train of gears (12) contains one and drives sun gear (13) mat one primary shaft ratchet (131) and claw (132) this axle drive shaft (10) person (annotate: this ratchet (131) adapter shaft (10) and this claw (132) then concentric ring ground pivot connect this sun gear (13)) that is coupled pivotally, one group of above drivings planetary wheel (14) meshes this sun gear (13) respectively and meshes an outer ring internal gear dish (140) and one of go up internal gear (141), coils axle sleeve (10a) person that (140) then are connected to spool (10); One first sprocket wheel (15) contains a central bearing (151) and is rotatably connected on the axle (10), most sprockets (152) are located at coupling one chain drive-belt (2) person on the circumference of sprocket wheel (15), and the right ratchet (153) of plural number radially, is located to arc or cycloidal face outside the sprocket wheel (15) and stretches in left inside the sprocket wheel (15) and establish one group of above gear mortise pin (142) with the planetary wheel that spins (14) person; One driving ratchet means (16) contains its diameter of a wheel disc (160) and approximates first sprocket wheel (15) person; The left the inside that the left side ratchet (163) of plural number radially, arc or cycloidal is located at wheel disc (160) is slide last ratchet (153) person of first sprocket wheel (15) that coincide left; Be hubbed at the identical person of second ratchet (161) who entreats partial sum to be fixed in axle (10) among the wheel disc (160), and a concentric ring bead (164) is located at circumference outside the wheel disc (160) one group of above claw (162) concentric ring; And one arrangement of clutch (17) contain U type fastener arc ground cover should the outer bead (164) of the concentric ring of escapement (16) use this escapement of slippage (16) can and the identical person of ratchet (153) of second sprocket wheel (15).

This arrangement of clutch (17) but mat one be located at such as the pull bar (not shown) of bicycle grip manual regulation in addition, just like the automatic speed changing gear person of general vehicle.

Each tooth of ratchet (153) of this first sprocket wheel (15) comprises that an inclined-plane is gradually oblique slightly forward, and each tooth of ratchet (163) of this driving pawl device (16) comprises that then an inclined-plane is gradually oblique slightly backward.Each ratchet of second ratchet (161) contains an inclined-plane and gradually tiltedly turns round and be difficult for the seceder in order to do making the coincide R1 direction those shown of this ratchet (161) tooth respectively such as Fig. 4 of this claw (162) forward respectively, this escapement (16) and this axle (10) forward being coupled easily forward.

As shown in Figure 5, this arrangement of clutch (17) can be moved to the left and make this escapement (16) this first sprocket wheel (15) that coincide, and makes one one of to be arranged with in escapement (16) middle body axle sleeve (10a) with one heart scrobicular ring (165) and a mat steel ball spring (167) and one of to hold in the steel ball hole (168) of being located at axle (10) steel ball (166) and match and be able to the location person.

This each tooth of primary shaft ratchet (131) comprises that an inclined-plane gradually tiltedly can rotate as Fig. 2 direction R1 those shown axle (10) and sun gear (13) in order to do making each tooth of ratchet (131) coincide with each pawl (132) forward backward in the forward coupling.So, being rotated in the forward also of sun gear (13) can't drive positive rotating shaft (10), and this understands each tooth of slippage ratchet (131) person as shown in Figure 2 because of claw (132).Then can make primary shaft ratchet (131) and claw (132) that the unidirectional operator of turning of (10) is provided in this way, this is in when driving disk (160) engagement first sprocket wheel (15) when doing fast turn-around, the driving of relevant axle (10) and driving wheel disc (160) not can and sun gear (13) and spool (10) between relation clash.

This chain drive-belt (2) end one second sprocket wheel (21) that is coupled afterwards is to be rotatably connected in portion such as Fig. 6 after the bicycle, 7 those shown.This second sprocket wheel (21) comprising: number sprocket (211) is located on sprocket wheel (21) upward with this chain (2) that is coupled more than more than one group, one group above outside claw (22) concentric ring ground be hubbed at outside this sprocket wheel (21) ring and be located at one of outside outer ratchet (23) forward of this sprocket wheel (21) identical, the identical person of ratchet (25) forward within claw (24) is located at sprocket wheel (21) middle body and is fixed on the hollow mandrel (411) within more than one group, the be connected wheel hub (41) of trailing wheel (4) of this axle (411), be revolve be located at one be fixed in vehicle frame after wheel shaft (42) go up the person.Should reach outer claw (22) by outer ratchet (23), and handle ratchet wheel (23) impels sprocket wheel (21) with interior claw (24), the forward coupling of axle (411) and wheel hub (41) is rotated as Fig. 6,7 those shown, and the free counter-rotating person of appearance sprocket wheel (21) and chain (2).

This second transmission system (3) shows as Fig. 6-9, comprise: an elementary support ring (31) is fixed on looks like graphic system and is affixed to this outer ratchet (23) person outside second sprocket wheel (21), one elementary centrifugal coupler (32) is held and is located on this support ring (31), one just grade coupled wheel the (33) be rotatably connected in have on this axle (411) a coupling bead (331) inwardly projection with this centrifugal coupler (32) friction coupling person, one first singly turns to coupling (30) operatively to be coupled, and this is taken turns (33) and is located at the last support ring (31) of sprocket wheel (21) and only can be turned to connect this and take turns (33) and support ring (31) forward runner by wheel (33), level each gear of planetary wheel (34) (34) pivot is connected on the gear tip (341) that being located at coupling wheel (33) outside at the beginning of more than one group, one primary sun gear (35) is connected with on a supporting disk (352) and this planetary wheel (34) is meshed, and mat one is located at gear (35) central authorities " axle ratchet " and is coincide and axle (411) that " sun gear claw " (351) person of plural number is rotatably connected in rear-wheel hub is arranged in order to do in being subjected to gear (35, can forward coupling rotation this gear (35) and axle (411) person when 34) driving, and an elementary internal gear (36) is located at one and is fixed in the ring dish (361) of car body with these planetary wheels (34) person as shown in Figure 6 that coincide.This planetary wheel (34) and sun gear (35) form one second planetary gear train person.

As Fig. 8, level centrifugal coupler (32) comprising at the beginning of shown in 10: curved approximately two recesses (321) that form in two ends of each boots of plural expansion boots (320) (320), tenon nests (323a) were arranged with in the bottom of metal sheet (323) above metal sheet (323) contained majority in one, one external friction piece (324) system own elasticity material and combine with this metal sheet (323) with centrifugally operated friction mode coupling bead (331) that this coupling takes turns (33) person as shown in Figure 9 that is coupled, and organize adjacent boots (320) persons of each tension spring of tension spring (322) (322) connection two more.

This elementary support ring (31) comprises that plural number supports projection (311) to be located on the anchor ring relative recess (321) the clamping person for the adjacent two brake boots of this centrifugal coupler (32), and often be fit under each tenon bolt (312) of most ejection tenon bolts (312) this ring (31) be arranged with under person as shown in Figure 8 in the square tenon nest (313).This projection (311) has an inclined-plane outwards to be inclination backward in order to do in can be with boots (320) outwards and direction ejection person radially when forward circles round as the ring (31) of Fig. 9.When bicycle was accelerated to centrifugal coupler (32) and coupling bead (331) coupling, each tenon bolt (312) was owing to be subjected to the relation of support ring (31) radial thrust to make the more firm person of coupling action by adding its bearing force of shoring boots (320) of benefit.

As Fig. 8, shown in 6 first singly turn to coupling (30) to comprise: an external annulus (301) is located at the inboard of support ring (31), one cam (302) is connected and one is located within coupling ring (33) central part on the ring (306), and each wedge-shaped part of most wedge-shaped parts (303) outwards backward deflection respectively contain a ball (304) elasticity and connect a ball spring (305) ejection ball (304) backward outwards to a gradually sharp compartment between between wheel (302) and ring wall (301), but by being be coupled cam (302) and support ring (31) person of one-way operation ground.

The present invention's coupling (30) can be because of should turning of interior ring (306) making support ring (31) and cam (302) and interior ring (306) coupling just go back to the person of revolving; But drive from outer support ring (31) if desire, figure make this support ring (31) and cam (302) and institute connects within during ring (306) coupling linkage, then can't directly be with commentaries on classics to be somebody's turn to do interior (306) person of ring by the support ring (31) of outside with ball (304) relation because of the inclined-plane of wedge-shaped part (303).This is even more important when saving in bicycle of the present invention slides not pedal, lid is because of interior ring (306), the rotator inertia of cam (302) and support ring (31) and wheel revolutions can return contrary coupling and drive and make the running that is coupled together of all rings, when we desire to step on the motor-car period of the day from 11 p.m. to 1 a.m (being pedal 11, the chain drive-belt 2 and second sprocket wheel 21) again.Sprocket wheel (21) can drive at once, and is unlikely in speed change " gear shift " process, the time the inconvenient phenomenon of the sky of stepping on arranged.

Another is organized second transmission system (3 ') and comprising with aforementioned transmission system (3) similar (showing as among Fig. 6): a secondary support ring (31 ') is located at face outside the supporting disk (352) of first sun gear (35), one secondary centrifugal coupler (32 ') is held and is located on this support ring (31 '), one or two can be coupled wheel (33 ') revolve be located at contain on this axle (411) a coupling bead (331 ') inwardly sky stretch with this centrifugal coupler (32 ') friction coupling person, one secondary list turns to coupling (30 ') operatively to be coupled, and (33 ') are taken turns in coupling to this coupling wheel (33 ') and support ring (31 ') only can be turned the just commentaries on classics person that is coupled by this coupling wheel (33 ') in order to do making with the support ring (31 ') of being located at one-level sun gear (35), one group of above secondary planetary gear (34 ') is articulated in the secondary internal gear (36 ') that dish (361) is located in face engagement outside the coupling wheel (33 '), and a secondary sun gear (35 ') meshes and be fixed in upward person of this axle (411) with this planetary wheel (34 ').

This secondary sun gear (351 ') is fixedly arranged on the axle (411), so slide in bicycle and not step on when moving, by the rotation of garage's inertia linkage gear (35 ') can make two groups of transmission systems (3 ', 3) coupling is rotated, and can be that second sprocket wheel (21) turns immediately when at any time stepping on chain (2) and the person that avoids stepping on the sky.Quite the be coupled wheel footpath of wheel (33,33 ') of the diameter of second sprocket wheel.Planetary wheel bar in running trailing wheel of the present invention (4) is located can increase running speed automatically.

Below narrate the present invention's method for changing speed:

When first transmission system (1) of using the present invention is done hand gear control, can make driving pawl device (16) separate with first sprocket wheel (15), make axle drive shaft (10) revolution drive sun gear (13) with first sprocket wheel (15) that circles round (annotating: drive planetary wheel (14) and sun gear (13) engagement) with pulling chain (2), and then turn round second sprocket wheel (21) and trailing wheel (4) is said one of first method for changing speed so that bicycle is done general microrunning person.As with driving pawl device (16) coupling first sprocket wheel (15), then sprocket wheel (15) direct drive chain (2) does faster that running is to say two of first method for changing speed.When turning sprocket wheel (15), escapement (16) will make sun gear (13) rotating speed surpass main shaft (10) rotating speed, so can't link and primary shaft ratchet (131).

As when creeping an abrupt slope, can move right arrangement of clutch (17) so that driving pawl device (16) separates this first sprocket wheel (15) as Fig. 1, in this way in pushes pedals 911) during axis of revolution (10), sun gear (13) can be changeed with rotation planetary wheel (14) to turn sprocket wheel (15) running bicycle person by main shaft (10) band.The rotating speed of first sprocket wheel (15) is far below the rotating speed of sun gear (13) with main shaft (10), so the driving of first sprocket wheel (15) will be very laborsaving.

Below meter is discussed the method for changing speed of the present invention's second transmission system (3,3 '):

The wheel (33) if this second sprocket wheel (21) is not coupled as yet, when planetary wheel (34) and sun gear (35), then sprocket wheel (21) band changes axle (411) rear wheel hub (41) with push-jump trailing wheel (4) person, is first (low) speed of second method for changing speed (3,3 ').

When the speed of a motor vehicle increased only turn first speed that is produced by second sprocket wheel (21) after, the expansion boots (320) of second transmission system (3) back down because of its centnifugal force relation overcomes its weight outward radial, make and be connected with level support ring (31) and this coupling wheel (33) friction coupling at the beginning of second sprocket wheel (21) is gone up, this planetary wheel (34) and sun gear (35) can be linked by this sprocket wheel (21), output work reaches axle (411) to turn wheel hub (41) and trailing wheel (4) with auto acceleration from sun gear (35), be for " second speed of second method for changing speed ", can consult Fig. 8-9.

Increase again as the speed of a motor vehicle, second group of second transmission system (3 ') will be pushed to continue dilating this centrifugal coupler (32 ') with rotation secondary planetary gear (34 ') and sun gear (35 '), sun gear (35 ') is " third speed of second method for changing speed " because of the axle (411) that connects with the heart turns axle and trailing wheel then.

The group number of second transmission system (3,3 ') etc. is not add restriction among the present invention, only in actual bicycle is used, " first, second speed of second method for changing speed ", foot money is used, as be mechanical power when can increase group number to increase speed change; First method for changing speed, second method for changing speed of arranging in pairs or groups promptly produces at a high speed automatic speed-changing system with low speed.

Person as shown in Figure 7, because the ratchet (25) of second sprocket wheel (21) makes this sprocket wheel (21) can just change this axle (411) with the engagement of pawl (24) system, so when just changeing this axle (411) as interior center, and can't turn this sprocket wheel (21), this is in transmission system (3,3 ') after the automatic high speed speed change, this sprocket wheel (21) and chain (2) are the influence that is not subjected to this axle (411).

Be to calculate the converter speed ratio of the present invention's first transmission system (1), can be with reference to following formula:

N＝B/P-1

The fixing number of teeth of internal gear (141) of B system in the formula, P system drives the number of teeth of sun gear (13), is 48 as B, and P is 36, and then N=1/3 is that the rotating speed of representing first sprocket wheel (15) will reduce 1/3, and speed is slowed down.

As make driving pawl device (16) mesh this first sprocket wheel (15), and then the rotating speed (being made as N15) of first sprocket wheel (15) is the rotating speed (N16) that is same as escapement (16), i.e. N15=N16 is so the output speed of sprocket wheel (15) promptly slows down.

In like manner, use the transmission principle of planetary gear train of the present invention, the sun gear (35,35 ') of this second transmission system (3,3 ') can be the planetary wheel (34,34 ') that this sprocket wheel (15,21) turned and drives accelerator on the contrary.

Therefore, if the converter speed ratio of first transmission system (1) is 2, and the converter speed ratio of second transmission system (3,3 ') is 3, and then total converter speed ratio of the present invention should be 2 * 3=6.

The present invention has following all advantages than the bicycle method for changing speed of commonly using:

1. can be automatically according to the road speed speed change, speed change is convenient.Need not change chain, move the chain speed change, exempt and take off the chain puzzlement, gain driving efficient.

2. because the operation of sun gear (13), planetary wheel (14) and first sprocket wheel (15) can be when climbing at a slow speed, laborsaving driving, that is have the structure of " afterburning shelves " to establish already during climbing.And during ratchet (16) engagement sprocket wheel (15), but speedup then as cooperates the operation of second transmission system (3,3 ') then can obtain higher speed synergistically, and control is freely soon, slowly.

3. mat changes the ratio of number of teeth between planetary wheel and sun gear, can change speed range greatly, and the converter speed ratio with dead slow can significantly improve the most at a high speed, is not subjected to diameter restrictions.

4. centrifugal friction formula gear shift, the moment that alleviates velocity shock and mechanical strees loads.And the ejection of all tenon bolts (312) coupling, the stability of the high-speed operation coupling of the present invention that more gains.

5. do not need to get final product direct change with other media the oil hydraulic system of traditional speed-change gear box (as be applied to), simple structure, volume is little, maintenance easily, the transmission power waste is little.

6. automatically, manually complementary, increase operation selectivity and comfort feature, and stress-relieving activity is day by day when the diversification, heavy gear selection more than the present invention, richer Fu Xingqu, and increase taste.

The present invention is not limited to the speed change system that pin is jumped car, other kinds vehicle or dynamic transfer system (not shown) also just the present invention add and give modifications, change, add and give application, the present invention's reality does not add restriction.

The bearing (not shown) that each ratchet of the present invention adopted is generally promptly applicable with the ball or the cylindrical bearing of traditional handicraft, and need not special restriction.

Claims (9)

1, a kind of automatic speed-changing system device is characterized in that it includes:

One first transmission system contains one first planetary gear train to be made up of a driving planetary wheel more than a group and a driving sun gear, this solar train is revolved on the axle drive shaft of being located at an actuating device to turn concentric and is connected with and one of fastens first sprocket wheel in this first planetary wheel and produce the first rotating speed person, and its diameter of driving pawl device quite the diameter person system of this first sprocket wheel arrange when operationally meshing this first sprocket wheel on this axle drive shaft and can coaxial heart to turn this first sprocket wheel with must the second rotating speed person when drive shaft; It is characterized in that,

At least one group second speed change gear comprises: one second epicyclic train revolves on the hollow mandrel of the wheel hub of being located at a wheel; One centrifugal coupler is held and is located at one and one of is connected on second sprocket wheel of a concentric on the support ring; This second sprocket system will be coupled the first sprocket wheel person of this first speed change gear; This centrifugal coupler is with this second epicyclic train of centrifugation operational coupled with when first chain wheel drive, second sprocket wheel; Can drive this second sprocket wheel and second epicyclic train to produce the speed change person more than the 3rd rotating speed

This first transmission system comprises: a planet train of gears contains one and drives sun gear and borrow the sub-concentric ring of a primary shaft ratchet and pawl this axle drive shaft person that is coupled pivotally, one group of above drivings planetary wheel axle sleeve person that this sun gear and identical one of is located on the internal gear dish excircle, internal gear person internal gear dish then is connected to axle drive shaft that coincide respectively; One first sprocket wheel contains a central bearing and is rotatably connected on the axle, most sprockets are located at coupling one chain drive-belt person on the circumference of sprocket wheel, and plural number the right ratchet radially, face outside the sprocket wheel is located on arc or cycloidal ground and the sprocket wheel the inside is inwardly stretched and established plural number and prop up the gear pin to spin the planetary wheel person; Two driving ratchet means contain its diameter of a wheel disc and approximate the first sprocket wheel person; Plural number left side ratchet radially, arc or cycloidal ground is located at the ratchet person on operationally identical first sprocket wheel in the inside of wheel disc; Be hubbed at the middle body and the identical person of second ratchet that is fixed in axle drive shaft of wheel disc, and a concentric ring bead is located at circumference outside the wheel disc one group of above claw concentric ring; And one arrangement of clutch contain that a U type fastener overlaps pivotally should the concentric ring bead of escapement with this escapement of slippage with the person that coincide of the ratchet with second sprocket wheel.

2, the automatic speed-changing system device according to claim 1, it is characterized in that wherein each tooth of ratchet of this first sprocket wheel comprises that an inclined-plane is gradually oblique slightly forward, each tooth of the ratchet of this driving pawl device comprises that then an inclined-plane is gradually oblique slightly backward, each ratchet of second ratchet contains an inclined-plane forward gradually tiltedly in order to do making respectively identical respectively this hook tooth person of this claw forward, can make this escapement and this axle drive shaft forward coupling ground revolution be difficult for the seceder in this way.

3, the automatic speed-changing system device according to claim 1, it is characterized in that wherein that this arrangement of clutch system can be moved to the left makes this escapement this first sprocket wheel that coincide, makes one one of to be arranged with in escapement middle body axle sleeve with one heart scrobicular ring and and one of to hold in the steel ball hole of being located at axle drive shaft steel ball by means of steel ball spring and match and be able to the location person.

4, the automatic speed-changing system device according to claim 1, it is characterized in that wherein this each tooth of primary shaft ratchet comprises that an inclined-plane gradually tiltedly make axle drive shaft and the sun gear can forward coupling rotation in order to do making each tooth of ratchet coincide with each pawl forward backward, being rotated in the forward of this sun gear is the person that can't just change the axle drive shaft.

5, the automatic speed-changing system device according to claim 1, it is characterized in that wherein this second transmission system comprises: a support ring is fixed on face person outside second sprocket wheel, one centrifugal coupler is often held and is located on this support ring, one coupling wheel be rotatably connected in have on this axle the inside projection of a coupling bead with this centrifugal coupler friction coupling person, one first singly turns to coupling one-way operation ground should the coupling wheel only can be turned to connect this coupling wheel and support ring forward runner by the coupling wheel with the support ring of being located on second sprocket wheel, one group of above each planetary wheel pivot of planetary wheel is connected on the gear pin of being located at coupling wheel outside, one sun gear is connected with on a supporting disk and is meshed with this planetary wheel, and borrow an identical axle that has most sun gear claw persons to be rotatably connected in rear-wheel hub of axle ratchet of being located at sun gear central authorities to rotate this sun gear and this axle person in order to do energy forward coupling when being subjected to the sun and planet gear drives, and one internal gear be located at one and be fixed in the ring dish of car body to mesh this planetary wheel person, this planetary wheel and sun gear form one second planetary gear train person.

6, the automatic speed-changing system device according to claim 5, it is characterized in that wherein this clutch coupler comprises: curved approximately two recesses that form in both sides of most each boots of expansion boots, metal sheet contains the bottom that most tops tenon fossa is located at metal sheet in one, one external friction piece system own elasticity material and and this metal sheet in conjunction with the bead person that is coupled with this coupling wheel of actuating friction ground coupling, and each tension spring of plural tension spring connects two adjacent boots with clamping person on this support ring.

7, the automatic speed-changing system device according to claim 5, it is characterized in that wherein this support ring comprises that it often is the relative recess clamping person of the adjacent two expansion boots of this centrifugal coupler that plural number supports projection to be located on the anchor ring, and often be fit under most ejection tenon bolts this support ring be arranged with under person in the square tenon nest, this projection has an inclined-plane outwards to be inclination backward in order to do can be with boots outwards and direction ejection person radially when the support ring forward circles round.

8, the automatic speed-changing system device according to claim 5, it is characterized in that wherein this singly turns to coupling to comprise: an external annulus is located at the inboard of support ring, one cam is connected and one is located within the coupling ring central part on the ring, and most wedge-shaped part wedge-shaped parts outwards backward deflection respectively contain a ball elasticity and connect a ball spring ejection ball backward outwards to a gradually sharp compartment between between cam and external annulus, by being that operationally be coupled cam and support ring list changes driver.

9, the automatic speed-changing system device according to claim 1, it is characterized in that wherein this sun gear of first group that this has most group second transmission systems supporting disk outside support second group the coupling wheel person that ring system borrows a centrifugal coupler operatively to be coupled these tool majority second transmission systems.

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