CN206938996U - A kind of bicycle or electric bicycle transmission device - Google Patents

Abstract

The utility model provides a kind of bicycle or electric bicycle transmission device, belongs to the transmission system field of bicycle or electric bicycle.It includes：First driving member, for transmitting the pedalling force from crank axle；Torque axis, its one end are connected with the first driving member, and are configured to rotatable around first rotation under the drive of the first driving member；Second driving member, it is connected with the other end of torque axis, for transmitting the torsion of torque axis；With flower-drum or motor, it is connected with the second driving member, and is configured to rear-wheel hub rotation rotatable around the second rotation axis under the drive of the second driving member, to be connected with driving with flower-drum or motor, and then drives the rotation of the trailing wheel of bicycle or electric bicycle.Compared with using the technical scheme of transmission shaft driven system in the prior art, transmission device of the present utility model carries out ingehious design using conventional gear, and structure is by a relatively simple, and the required precision to flower-drum is not high, can improve installation effectiveness.

Description

A kind of bicycle or electric bicycle transmission device

Technical field

The transmission system of bicycle or electric bicycle is the utility model is related to, more particularly to a kind of bicycle or electronic Bicycle drive.

Background technology

Though the shared bicycle occurred, electric car met popular travel requirement in nearly 2 years, its kind of drive is most of still So use sprocket wheel chain drive.Although this drive mechanism is provided with chain baffle plate, but still fall within open-drive configuration, rides The trouser legs of passerby or shirt rim are easy to be wound or broken by the teeth by chain or sprocket wheel, even result in bicyclist and fall down and cause property or people Body injures.Simultaneously as chain material fatigue stretching for a long time, easily occurs fracture or comes off, need in use for some time Again to safeguard or install, so bring many worries to bicyclist.Electric bicycle is there is also above mentioned problem, city in recent years Occur the transmission system that power transmission shaft replaces chain drive on field, but there is problems：

Firstly, there are install the shortcomings that inconvenient.Spiral bevel gear is higher to installation dimension required precision, to manufacturer's essence Degree requires higher, and rear drum assembly is generally standard component, and its precision is not by far up to the mark, and can not meet that spiral bevel gear is installed The requirement of precision.To reach the purpose that noise is small, shake is small, it is necessary to which the pad not waited by thickness carries out trial assembly regulation, wastes big The time is measured, reduces operating efficiency.

Second, influence the life-span.After being engaged due to rear axle driving gear with rear axle driven gear, it is not in one and completely encloses Space in, and with grease lubrication, though there is dustproof construction, unavoidable dust enters in long-play, in working gear When, dust and lubricating grease mutually merge, and are attached to gear surface, increase the frictional force of gear surface indirectly, increase tooth Foot wheel abrasion.Lubricating grease also relative solidification simultaneously, loses lubricant effect gradually.Due to can not accurately grasp lose lubrication it is specific when Between, gear is run under conditions of a unlubricated medium, so as to influence gear life, ultimately results in the contracting of integrated model life-span It is short.

3rd, safeguard inconvenience, time cost height.It is not totally enclosed dust-proof due to having outside rear axle driving gear and driven gear Structure, when adding lubricating grease need to instrument by dust cover take down could operation, but few related tools of average family, And some dustproof constructions use profile tool so that personal or household maintenance is more difficult, goes maintenace point to safeguard and then wastes greatly The stand-by period of amount, so as to bring more inconvenience to maintenance.

4th, totally enclosed power transmission shaft before and after occurring in existing market, but lacked between its power transmission shaft and flower-drum or motor shaft Lack the strong point, the situation of motor shaft and power transmission shaft decentraction easily occur in assembling process, and motor uses special motor and flower Drum, launches rear drum and the damage of large area and abnormal sound occurs in motor, while flower-drum and motor cost are too high, cause to consume The unnecessary economic expenditure of person.

Utility model content

A purpose of the present utility model is to provide for a kind of bicycle or electric bicycle transmission device, to solve to use Chain breakage caused by sprocket wheel chain drive comes off, property or personal injury and maintenance difficult etc. to caused by bicyclist Problem.

The utility model is further objective is that will solve after rear axle driving gear engages with rear axle driven gear, to be not in It is caused in one completely enclosed space to repair the problem of inconvenient and gear life is short.

The utility model another further objective is that to solve prior art driving tooth and pawl seat is connected by screw thread In the mode connect, the difficulty of processing of parts is big, low production efficiency, homogeneity of product and the problems such as less stable.

Especially, the utility model provides a kind of bicycle or electric bicycle transmission device, including：

First driving member, for transmitting the pedalling force from crank axle；

Torque axis, its one end are connected with first driving member, and are configured to the band in first driving member It is rotatable around first rotation under dynamic；

Second driving member, it is connected with the other end of the torque axis, for transmitting the torsion of the torque axis；With

Flower-drum or motor, it is connected with second driving member, and is configured to the band in second driving member It is rotatable around the second rotation axis under dynamic, to drive the rear-wheel hub being connected with the flower-drum or motor to rotate, and then described in driving The trailing wheel of bicycle or electric bicycle rotates.

Further, first driving member includes：

First driving gear, it is meshed with the crank axle, for being rotated under the drive of the crank axle around the 3rd Axis is rotatable；With

First driven gear, it is meshed with first driving gear, for by first driving gear around described The translating rotation of 3rd rotation axis is rotation of first driven gear around the first rotation；

Wherein, first driven gear is configured to be connected with one end of the torque axis, to cause the torque axis It is rotatable around the first rotation under the drive of first driven gear.

Further, second driving member includes：

Second driving gear, it is connected with the other end of the torque axis, with the drive of the torque axis around institute It is rotatable to state first rotation；With

Second driven gear, it is meshed with second driving gear, for by second driving gear around described The translating rotation of first rotation is rotation of second driven gear around second rotation axis；

Wherein, second driven gear is configured to be connected with one end of the flower-drum or motor, with driving with it is described The rear wheel that flower-drum or motor are connected.

Further, there is a die cavity in second driving gear, has in the die cavity：

Ratchet, its one end are connected with the other end of the torque axis, with the drive of the torque axis around described One rotation axis is rotatable；With

Pawl component, it is configured to carry out the ratchet when the ratchet is rotated with the first direction of rotation It is spacing, rotated with limiting the ratchet relative to the die cavity, so that the ratchet drives the second driving gear rotation, And when the ratchet is rotated with the second direction of rotation opposite with first direction of rotation, the pawl component can Moved under the promotion of the gear teeth of the ratchet along the direction away from the die cavity center line, to cause the ratchet with respect to institute Die cavity rotation is stated, so as to which second driving gear can not be driven to rotate.

Further, the transmission device also includes：

Protective case, it is configured along the outer peripheral face circumferentially around the torque axis of the torque axis, and described There is a gap between the inner peripheral surface of the outer peripheral face of torque axis and the protective case；

Alternatively, second rotation axis is parallel with the 3rd rotation axis.

Further, the flower-drum or motor include：

First end, it is connected by splined shaft with second driven gear, with second driven gear It is rotatable around the second rotation axis under drive；With

The second end, it is reversed with the first end.

Further, the transmission device also includes：

First casing, for by first driving member, one end of the torque axis and at least partly crank axle It is arranged in first casing；With

First lid, it has the first opening and first end face, and first opening is constructed to be permeable to from the torque axis One end passes through, and the first end face is connected with first casing, for sealing first casing.

Further, the transmission device also includes：

Second casing, for by second driving member, the other end of the torque axis and the flower-drum or motor First end is arranged in second casing；With

Second lid, it has the second opening and second end face, and second opening is constructed to be permeable to from the torque axis The other end passes through, and the second end face is connected with second casing, for sealing second casing.

Further, the lubricant medium between first driving gear and first driven gear is lubricating oil, institute It is lubricating oil to state the lubricant medium between the second driving gear and second driven gear；

Wherein, first casing and second casing are respectively provided with oil filler point and drain oil, are set at the oil filler point Oiling bolt is equipped with, oil discharge screw is provided with the drain oil, with real by the oiling bolt and the oil discharge screw The replacing of the existing lubricating oil.

Further, the second end of the flower-drum or motor is fixed on the car of the bicycle or electric bicycle At frame chain stay.

Scheme of the present utility model, due to being driven using torque axis driving member, and in torque axis periphery bread Protective case is covered with, therefore, is not in using chain breakage caused by sprocket wheel chain drive or comes off, to caused by bicyclist The problems such as property or personal injury and maintenance difficult.Technical scheme phase with using transmission shaft driven system in the prior art Than, transmission device of the present utility model carries out ingehious design using conventional gear, and structure is by a relatively simple, and to flower-drum Required precision is not high, can improve installation effectiveness.

Further, each gear is in the first or second casing, and the first or second casing is enclosed construction, Dust is hardly entered during long-play, avoids dust from improving the service life of gear to the frictional force of gear surface. And also there is oil filler point and drain oil at first and second casing, realized by oiling bolt and oil discharge screw between gear The replacing of lubricating oil.Thus provided convenience for the replacing of lubricating oil, while improve oil change efficiency.

Further, compared with the technical scheme for being in the prior art connected through a screw thread rear axle driving tooth and pawl seat, Ratchet and pawl component are assembled with second driving gear of the present utility model, i.e. pawl slot fusion is in the second driving gear Interior, ratchet improves efficiency of assembling as single part.

According to the accompanying drawings will be more to the detailed description of the utility model specific embodiment, those skilled in the art Add clear of the present utility model above-mentioned and other purposes, advantages and features.

Brief description of the drawings

It is described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter more of the present utility model specific real Apply example.Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that What these accompanying drawings were not necessarily drawn to scale.In accompanying drawing：

Fig. 1 is the power train of the bicycle or electric bicycle according to the transmission device of the utility model one embodiment Schematic side elevation view；

Fig. 2 is the profile according to the transmission device of the utility model one embodiment；

Fig. 3 is the profile combined according to second driving gear of the utility model one embodiment；

Fig. 4 is the sectional view that the second driving gear combination shown in Fig. 3 is cut along Fig. 3 line A-A.

Embodiment

Fig. 1 shows the transmission of the bicycle or electric bicycle according to the transmission device of the utility model one embodiment The schematic side elevation view of system.As shown in figure 1, the transmission device is arranged in the power train of bicycle or electric bicycle.Pass Dynamic is that generality can include a pair of pedals 51, a pair of crank arms 50, transmission device and rear-wheel hub 49.Pedal 51 is distinguished rotatable Ground is installed to the free end of crank arm 50.The inner of crank arm 50 is respectively fixed to the opposite end of the crank axle 5 of transmission device.It is right In the power train of bicycle or electric bicycle, the pedalling force acted on pedal 51 is sent to rear-wheel hub via drive path 49.Wherein, drive path is to transmission device, then to rear-wheel hub 49 by crank arm 50.The rear-wheel hub 49 can be connected to flower-drum Or motor 48, so that the rotation of the rear wheel derived from driving or electric bicycle.It is understood that when for bicycle when, after this Wheel hub 49 can be connected to flower-drum.When for electric bicycle when, the rear-wheel hub 49 can be connected to motor, the motor can be one Body turbin generator.Illustrated below by taking bicycle as an example.

Fig. 2 shows the profile of the transmission device according to the utility model one embodiment.Fig. 2 is represented from shown in Fig. 1 The profile seen perpendicular to the direction of paper of edge.As depicted in figs. 1 and 2, the transmission device one end is connected with crank axle 5, The other end is connected with rear-wheel hub 49, and it is in response to acting on the pedalling force on pedal 51, after the pedalling force is sent to Wheel hub 49.

As depicted in figs. 1 and 2, the transmission device can include the first biography for being used to transmit the pedalling force for crank axle 5 of making a return journey Dynamic component.First driving member can include the first driving gear 8 and the first driven gear 19.The transmission device can also wrap Include the first casing 4 and the first lid 22.Frame five-through 3 is run through in the small end part of first casing 4, and is sequentially loaded into improved mat 2 and retaining ring 1.It is connected with each other between the retaining ring 1 and first casing 4 by screw thread.First driving gear 8 is arranged on this In first casing 4, and be meshed with crank axle 5, its in response to crank axle 5 rotation process, with the rotation of the crank axle 5 grasp Rotated under the drive of work around the 3rd rotation axis.First driven gear 19 is arranged in the first casing 4, and with this first actively Gear 8 is meshed, and it can be rotated under the drive of the first driving gear 8, and by the first driving gear 8 around the 3rd rotation The translating rotation of axis is rotation of first driven gear 19 around first rotation.First lid 22 has first end face, The first end face is connected with the first casing 4, for sealing the first casing 4.

The transmission device can also include torque axis 24 and with the second driving member.The one end of torque axis 24 and first biography Dynamic component is connected, and the other end is connected with second driving member, and is constructed to be permeable under the drive of the first driving member It is rotatable around first rotation.One end of the torque axis 24 is specifically connected with the first driven gear 19 of the first driving member Connect, and can be rotatable around first rotation under the drive of the first driven gear 19.First lid 22 can also include First opening, first opening are configured to pass through from one end of the protective case 23 of torque axis 24, and real by first end face Now to the sealing of the first casing 4.The protective case 23 is configured along the outer peripheral face circumferentially around torque axis 24 of torque axis 24, To realize the cladding to torque axis 24, to protect bicyclist to escape injury.And the outer peripheral face of torque axis 24 and protective case 23 There is a gap between inner peripheral surface, the inner peripheral surface of protective case 23 is caused to wear during preventing that torque axis 24 from rotating.Second biography Dynamic component can receive the torsion of torque axis 24, and the torsion is transferred to the flower-drum being connected with second driving member.Should Flower-drum is configured to rear-wheel hub rotatable around the second rotation axis under the drive of the second driving member, to be connected with driving with flower-drum 49 rotate, and then drive the trailing wheel rotation of bicycle.

The transmission device can also include the second casing 29 and the second lid 25.Second driving member can include second The driven gear 35 of driving gear 42 and second.The flower-drum or motor 48 have first end and opposite with the first end second End.The second end of the flower-drum or the axle of motor 48 and cycle frame lower-left chain stay 13 pass through the first lock washer 151 and the The one mutually locking connection of locking nut 14.The first end passes through second casing 29, and passes through the second lock washer 152 and Two locking nuts 16 are mutually locked.Second casing 29 has vehicle frame fixing hole 29a, by the vehicle frame fixing hole 29a with being somebody's turn to do certainly It is inter-connected via a bolt joint and locks on the right side of driving vehicle frame.Second driving gear 42 is arranged in second casing 29, and It is connected with the other end of torque axis 24, it can be rotatable around first rotation under the drive of torque axis 24.This second Driven gear 35 is arranged in second casing 29, and is meshed with second driving gear 42, and it can be by the second driving tooth Wheel 42 is rotation of second driven gear 35 around the second rotation axis around the translating rotation of first rotation.The flower-drum or motor 48 first end outer cover is provided with spline housing, and is connected by splined shaft 33 with second driven gear 35.This second Lid 25 has second end face and the second opening, and the second end face is connected with the second casing 29, for sealing the second casing 29.Should Second lid 25 can also include the second opening, and second opening is configured to can be from the other end of the protective case 23 of torque axis 24 Pass through, and the sealing to the second casing 29 is realized by second end face.

Fig. 3 shows the profile according to second driving gear of the utility model one embodiment combination 26.Fig. 4 is shown The sectional views that the second driving gear combination 26 shown in Fig. 3 is cut along Fig. 3 line A-A.As shown in Figure 3 and Figure 4, second master There is a die cavity in moving gear 42.There is ratchet and pawl component in the die cavity.The ratchet one end and the other end of torque axis 24 It is connected, with rotatable around first rotation under the drive of torque axis 24.The pawl component includes ratchet 44 and click spring 45.The pawl component is configured to can be spacing to ratchet progress when the ratchet is rotated with the first direction of rotation, with limit Make the ratchet to rotate relative to the die cavity, so that the ratchet drives the die cavity to rotate, and then drive the second driving gear 42 to revolve Turn, and when the ratchet is rotated with the second direction of rotation opposite with first direction of rotation, the pawl component can be Moved under the promotion of the gear teeth of the ratchet along the direction away from the die cavity center line, to cause the ratchet to be revolved with respect to the die cavity Turn, so as to which second driving gear 42 can not be driven to rotate.Second driving gear 42, die cavity and the ratchet structure in the die cavity Part constitutes the second driving gear combination 26.The die cavity includes pawl base preformed groove, ratchet preformed groove and ratchet chamber 42a.

Scheme of the present utility model, due to being driven using the driving member of torque axis 24, and in the periphery of torque axis 24 Bread is covered with protective case 23, therefore, is not in using chain breakage caused by sprocket wheel chain drive or comes off, to bicyclist Caused by property or personal injury and the problems such as maintenance difficult.Technical side with using transmission shaft driven system in the prior art Case is compared, and transmission device of the present utility model carries out ingehious design using conventional gear, and structure is by a relatively simple, and to flower Bulging required precision is not high, can improve installation effectiveness.

In one embodiment, the assembly method of second driving gear 42 is that pawl base 43 is placed in into pawl base reserves In groove, ratchet 44 is placed in ratchet preformed groove, click spring 45 is passed sequentially through into ratchet preformed groove and pawl base preformed groove, and it is solid It is scheduled on pawl base 43.The ratchet 44 and click spring 45 constitute the pawl component.The pawl component is placed in the second driving tooth In the ratchet chamber 42a of wheel 42.The die cavity also includes support block preformed groove and block preformed groove.It is pre- that support block 46 is screwed in into support block Stay in groove, block 47 is screwed in block preformed groove.The one end of block 47 is threadedly coupled with the second driving gear 42.The support block 46 and the collective effect of block 47 with fixed pawl seat 43.In the embodiment shown in Fig. 2 to Fig. 4, when ratchet turns clockwise When, the ratchet 44 can move under the promotion of the gear teeth of the ratchet along the direction away from the die cavity center line so that ratchet Die cavity can not be driven to rotate together, so as to which the second driving gear 42 can not be driven to be rotated, now, driving gear is in static State, rear-wheel hub 49 do not rotate.When ratchet rotate counterclockwise, the ratchet 44 can be spacing to ratchet progress, should with limitation Ratchet rotates relative to the die cavity, so that the ratchet drives the die cavity to rotate together, and then drives the second driving gear 42 to enter Row rotation, now, driving gear rotates together with torque axis 24, and then drives rear-wheel hub 49 to rotate.

In one embodiment, the first casing 4 has the first case lid 11 being reversed with the first casing 4, first case The case lid 11 of body 4 and first is hollow, and is reserved with the first space in the first casing 4, and is reserved with first case lid 11 Two spaces.The oil sealing 6 of clutch shaft bearing 7 and first is installed respectively in the first space, second bearing 9 is installed respectively in second space With the second oil sealing 12.First sealing ring 10 is placed in the first case lid 11 close to the opening position of second space.By the first driving tooth Wheel 8 loads the inner ring of the second bearing 9.One end of crank axle 5 sequentially passes through first oil sealing 6 and clutch shaft bearing 7, the other end according to It is secondary to pass through the first driving gear 8, second bearing 9, the second oil sealing 12 and the first sealing ring 10.First driving gear 8 and the crank The spline 8a of axle 5 is connected.It is connected with each other between first lid 22 and protective case 23 by the way of pressing and welding.Second lid Also it is connected with each other between body 25 and protective case 23 by the way of pressing and welding.The end face bolt 18 of first driven gear 19 revolves Enter the first driven gear 19, and first driven gear 19 is loaded into 3rd bearing 20,3rd bearing 20 is placed in the first lid In 22 preformed groove, and the second sealing ring 17 is inserted in, is placed in the profile form intracavitary of the first casing 4, uses the first clamping screw Locked.The one end of torque axis 24 is penetrated in the preformed groove of the first driven gear 19.Second driving gear combination 26 is loaded Fourth bearing 27, it is placed in the headspace of the second lid 25.The endoporus of pawl base 43 is connected with each other with torque axis 24, and The torque axis 24 is the square shaft of entire body six.3rd sealing ring 28 is arranged on the outer ring of the second lid 25.Successively by support pad 30, 3rd oil sealing 31 and the first needle bearing 32 load the second casing 29, and are connected with each other with the second lid 25.Second driving gear Combination 26 is placed in the die cavity of the second casing 29, is connected with each other locks by the second clamping screw 21 between the two.By the 4th oil sealing 39 and 5th bearing 36 be sequentially loaded into the second case lid 38, the 4th sealing ring 37 is loaded in the preformed groove of the second case lid 38.By Two needle bearings 34 load splined shaft 33, and the less small end of diameter of the second driven gear 35 from splined shaft 33 penetrates, and screws. Second driven gear 35 is threadedly coupled with splined shaft 33.By being relatively large in diameter after the combination of the second driven gear 35 and splined shaft 33 Big end load 5th bearing 36 on, and through the oil sealing 39 of 5th bearing 36 and the 4th centre bore.By above-mentioned assembling it is complete zero Part loads the second casing 29 and screwed, and is attached between the second casing 29 and the second case lid 38 by screw thread.Motor shaft or The outside of flower drum shaft is in contact with the inner side of the second needle bearing 34, and plays a supporting role.Above-mentioned all sealing ring and oil The effect of envelope is sealing function.

Wherein, the lubricant medium between first driving gear 8 and first driven gear 19 is lubricating oil, second master Lubricant medium between moving gear 42 and second driven gear 35 is lubricating oil.First casing 4 and second casing 29 are equal With oil filler point and drain oil, oiling bolt 40 is provided with the oil filler point, oil discharge screw 41 is provided with the drain oil, To realize the replacing of the lubricating oil by the oiling bolt 40 and the oil discharge screw 41.

Each gear is in the first casing 4 or the second casing 29 in the utility model, and the first casing 4 or the second case Body 29 is enclosed construction, and dust is hardly entered during long-play, avoids frictional force of the dust to gear surface, is improved The service life of gear.And also there is oil filler point and drain oil at the casing 29 of the first casing 4 and second, pass through oiling spiral shell Bolt 40 and oil discharge screw 41 realize the replacing of the lubricating oil between gear.Thus provide convenience for the replacing of lubricating oil, carry simultaneously High oil change efficiency.

Compared with the technical scheme for being in the prior art connected through a screw thread rear axle driving tooth and pawl seat, the utility model The second driving gear 42 in there is ratchet chamber 42a, and be provided with pawl base 43, pawl component can be directly installed on to the spine In pawl seat 43, and the pawl base 43 is to be fixed on by limit assembly in ratchet chamber 42a.Therefore, ratchet is made when mounted For single part, efficiency of assembling is greatly improved.

So far, although those skilled in the art will appreciate that herein it is detailed have shown and described it is of the present utility model more Individual exemplary embodiment, still, still can be public according to the utility model in the case where not departing from the spirit and scope of the utility model The content opened directly determines or derived many other variations or modifications for meeting the utility model principle.Therefore, this practicality is new The scope of type is understood that and regarded as to cover other all these variations or modifications.

Claims (10)

1. a kind of bicycle or electric bicycle transmission device, including：

First driving member, for transmitting the pedalling force from crank axle；

Torque axis, its one end are connected with first driving member, and are configured under the drive of first driving member It is rotatable around first rotation；

Second driving member, it is connected with the other end of the torque axis, for transmitting the torsion of the torque axis；With

Flower-drum or motor, it is connected with second driving member, and is configured under the drive of second driving member It is rotatable around the second rotation axis, to drive the rear-wheel hub being connected with the flower-drum or motor to rotate, and then described in driving voluntarily The trailing wheel of car or electric bicycle rotates.

2. transmission device according to claim 1, wherein, first driving member includes：

First driving gear, it is meshed with the crank axle, under the drive of the crank axle around the 3rd rotation axis It is rotatable；With

First driven gear, it is meshed with first driving gear, for by first driving gear around the described 3rd The translating rotation of rotation axis is rotation of first driven gear around the first rotation；

Wherein, first driven gear is configured to be connected with one end of the torque axis, to cause the torque axis in institute State rotatable around the first rotation under the drive of the first driven gear.

3. transmission device according to claim 2, wherein, second driving member includes：

Second driving gear, it is connected with the other end of the torque axis, with the drive of the torque axis around described One rotation axis is rotatable；With

Second driven gear, it is meshed with second driving gear, for by second driving gear around described first The translating rotation of rotation axis is rotation of second driven gear around second rotation axis；

Wherein, second driven gear is configured to be connected with one end of the flower-drum or motor, with driving and the flower-drum Or the rear wheel that motor is connected.

4. transmission device according to claim 3, wherein, there is a die cavity, the die cavity in second driving gear Inside have：

Ratchet, its one end are connected with the other end of the torque axis, to be revolved under the drive of the torque axis around described first Shaft axis are rotatable；With

Pawl component, it is configured to limit the ratchet when the ratchet is rotated with the first direction of rotation Position, is rotated with limiting the ratchet relative to the die cavity, so that the ratchet drives the second driving gear rotation, and When the ratchet is rotated with the second direction of rotation opposite with first direction of rotation, the pawl component can be Moved under the promotion of the gear teeth of the ratchet along the direction away from the die cavity center line, make it that the ratchet is relatively described Die cavity rotates, so as to which second driving gear can not be driven to rotate.

5. according to the transmission device any one of claim 2-4, wherein, the transmission device also includes：

Protective case, it is configured along the outer peripheral face circumferentially around the torque axis of the torque axis, and the moment of torsion There is a gap between the inner peripheral surface of the outer peripheral face of axle and the protective case；

Wherein, second rotation axis is parallel with the 3rd rotation axis.

6. the transmission device according to claim 3 or 4, wherein, the flower-drum or motor include：

First end, it is connected by splined shaft with second driven gear, with the drive of second driven gear Under it is rotatable around the second rotation axis；With

The second end, it is reversed with the first end.

7. transmission device according to claim 6, wherein, the transmission device also includes：

First casing, for first driving member, one end of the torque axis and at least partly described crank axle to be set In first casing；With

First lid, it has the first opening and first end face, and first opening is constructed to be permeable to from one end of the torque axis Pass through, the first end face is connected with first casing, for sealing first casing.

8. transmission device according to claim 7, wherein, the transmission device also includes：

Second casing, for by the first of second driving member, the other end of the torque axis and the flower-drum or motor End set is in second casing；With

Second lid, it has the second opening and second end face, and second opening is constructed to be permeable to from the another of the torque axis End is through the second end face is connected with second casing, for sealing second casing.

9. transmission device according to claim 8, wherein, between first driving gear and first driven gear Lubricant medium be lubricating oil, the lubricant medium between second driving gear and second driven gear is lubricating oil；

Wherein, first casing and second casing are respectively provided with oil filler point and drain oil, are provided with the oil filler point Oiling bolt, oil discharge screw is provided with the drain oil, to realize institute by the oiling bolt and the oil discharge screw State the replacing of lubricating oil.

10. according to the transmission device any one of claim 7-9, wherein, second end of the flower-drum or motor Portion is fixed at the vehicle frame chain stay of the bicycle or electric bicycle.