CN103403405A

CN103403405A - Transmission for automatic two-wheeled vehicle

Info

Publication number: CN103403405A
Application number: CN201280011179XA
Authority: CN
Inventors: 益田大治
Original assignee: Suzuki Motor Corp
Current assignee: Suzuki Motor Corp
Priority date: 2011-03-01
Filing date: 2012-02-29
Publication date: 2013-11-20
Anticipated expiration: 2032-02-29
Also published as: JPWO2012118120A1; CN103403405B; WO2012118120A1; JP5831538B2

Abstract

A transmission for a two-wheeled vehicle comprises: an input shaft that transmits motive force from a crank shaft; an output shaft; a plurality of gear pairs having a gear that rotates in conjunction with the input shaft and a gear that meshes with said gear and is freely rotatable relative to the output shaft, and each having different gear ratios; a plurality of dog clutches that make each of the plurality of gear pairs intermittently rotate freely relative to or in conjunction with the output shaft; a plurality of shift forks (7) that intermittently transmit motive force to each of the plurality of dog clutches; and a shift cam that is capable of moving the plurality of shift forks and selectively transmitting motive force to one of the plurality of gear pairs.

Description

The variable-speed motor of motorcycle

Technical field

The present invention relates to a kind of variable-speed motor of motorcycle.

Background technique

Variable-speed motor in vehicle (so-called transmission device), transferring power is used between the output shafts such as motor prime movers and axletree, and the power rotating speed that transmits, moment of torsion etc. are carried out to conversion.As the actual most of variable-speed motors that are used as the manual drive of motorcycle, known have for example dog-clutch formula (also referred to as " engagement type all the time ") manual drive.

Such variable-speed motor in the past possesses: receive input shaft from the power of for example engine crankshaft, by chain drive-belt for example by transmission of power to the output shaft of axletree and have the gear of input shaft side and the gear of output shaft side and gear ratio different a plurality of gear mesh separately.

Gear mesh has two groups of following gear mesh: but but one group of gear mesh have the moving gear of being combined rotatably with the input shaft one, and with should moving gear mesh all the time and on output shaft, rotate the chimeric gear of activity freely; Another group gear mesh is opposite with it, but namely has on input shaft freely the chimeric gear of activity of rotation, reach the moving gear that meshes all the time with the chimeric gear of this activity and be combined rotatably with the output shaft one.But moving gear when with the axle one, rotating, can slide to the spin axis direction to the groove (spline) of the spin axis direction extension of input shaft or output shaft in utilization.

In addition, variable-speed motor has: a plurality of dog-clutches, these a plurality of dog-clutches make the chimeric gear of activity and the axle in every group of gear mesh be in on-off state, and rotation is changed freely or the one rotationization to reach; A plurality of shifting forks, these a plurality of shifting forks carry out intermittently each dog-clutch; And shifting cam, this shifting cam moves a plurality of shifting forks and can carry out optionally transmission of power to a certain group in a plurality of gear mesh.

But moving gear is so-called power shift gear, with the claw type selector, forms as one.

Oblique back upper place at input shaft arranges the shifting cam that both sides approach, so that do not become undue long along the shifting fork of input shaft or output shaft extension.

Variable-speed motor utilizes shifting fork and dog-clutch that the chimeric gear of some activities and axle are given to the one rotationization, can carry out optionally transmission of power to a plurality of gear mesh, changes gear ratio (for example with reference to patent documentation 1).

In addition, variable-speed motor in the past has the long connecting rod (so-called gearshift connecting rod) in the above-below direction extension of the side direction vehicle of crankcase, with the oblique back upper place that is configured in input shaft from shifting cam, be the state on the top of crankcase, connect gear level and shifting cam (for example with reference to patent documentation 2).

Patent documentation 1: Japanese kokai publication hei 10-77861 communique

Patent documentation 2: Japanese kokai publication hei 9-123972 communique

Invent problem to be solved

Above-mentioned variable-speed motor in the past, because the chimeric gear of activity and dog-clutch are dispersed in respectively on input shaft and output shaft, the shifting fork that therefore, must possess the shifting fork that extends to the dog-clutch of input shaft side and extend to the dog-clutch of output shaft side.This just need to be by shifting cam close to input shaft and the configuration of output shaft both sides ground, the configuration degrees of freedom of obvious damage shifting cam.

more particularly, in the situation that the variable-speed motor that patent documentation 1 is put down in writing, owing to forming triangular ground, configure this three parts: the bent axle that is in the forward side of crankcase in the side view of motor, be in the input shaft of the oblique back upper place of bent axle, and the output shaft that is in the oblique rear lower side of input shaft, therefore, in order to make shifting cam near input shaft and output shaft both sides, and do not hinder the transmission of power of bent axle and input shaft, preferably make shifting cam be positioned at the spin axis by input shaft and output shaft plane rear side (in more detail, the oblique back upper place of input shaft), the configuration degrees of freedom is very low.

On the other hand, due to motor from output shaft by such as chain drive-belt or drive the transfer mechanism such as belt and by transmission of power to driving wheel, therefore, in order with these transfer mechanisms, not interfere, need configuration that motor is suspended in to the carriage on car body.For example, in the situation that the variable-speed motor that patent documentation 1 is put down in writing, carriage is the rear side of avoiding output shaft, prevents the configuration of interfering with transfer mechanism.

Yet by transmission of power during to driving wheel, the output shaft of motor bears towards rearward tension load when transfer mechanism.The tension load that acts on this output shaft has such situation: the distance longer (being that the arm of force is longer) between output shaft and carriage, on crankcase, just produce larger flexural stress, and hinder the smooth action of variable-speed motor.; in the situation that the variable-speed motor that patent documentation 1 is put down in writing; an output shaft carriage nearby; because constantly seek to avoid, with transfer mechanism, interfere; and in order to avoid shifting cam and shifting fork away from output shaft; because of the tension load that acts on output shaft, encourage the flexural stress that produces on the crankcase, hindered the smooth action of variable-speed motor.

In addition, must make shifting cam near input shaft and output shaft both sides, this footrest that just causes making shifting cam and vehicle the above-below direction of vehicle significantly away from.For example, in the situation that the variable-speed motor that patent documentation 2 is put down in writing, motorcycle is in order to connect gear level and shifting cam, the long connecting rod (so-called gearshift connecting rod) that need to extend at the above-below direction of the side direction vehicle of crankcase.Jockey's pin and the interference of connecting rod while for fear of the jockey, being placed on pin on footrest, the rotating center position of the direction of the extension of this connecting rod and gear level just produce restriction.This just causes, even according to jockey's physique (the especially length of pin), suitably adjust the position of footrest, also hinders moving around rotating center of gear level, to operability and the operation sense generation uncomfortable feeling of gear level.

Summary of the invention

Invent problem to be solved

Therefore, the problem in view of above-mentioned conventional art, the object of the invention is to, and a kind of variable-speed motor of motorcycle is provided, and its shifting cam is very high with respect to the configuration degrees of freedom of input shaft and output shaft.

For solving the means of problem

For achieving the above object, the variable-speed motor of motorcycle of the present invention has: the first power transmission shaft, and this first power transmission shaft is any one party in input shaft and output shaft, for transmitting the power from bent axle; The second power transmission shaft, this second power transmission shaft are any the opposing party in described input shaft and described output shaft; The multiple sets of teeth wheel is right, and the gear ratio of this gear mesh is different separately, has with side's gear of described the first power transmission shaft one rotation and meshes and rotation the opposing party's gear freely on described the second power transmission shaft with described side's gear; A plurality of dog-clutches, this dog-clutch make described multiple sets of teeth wheel be in on-off state to described the opposing party's gear and described the second power transmission shaft in each group, and rotation is changed freely or the one rotationization to reach; A plurality of shifting forks, this shifting fork carries out transmission of power intermittently to each in described a plurality of dog-clutches; And shifting cam, this shifting cam moves described a plurality of shifting fork, can carry out optionally transmission of power to a certain group of described multiple sets of teeth wheel centering.

The effect of invention

Employing has the variable-speed motor of the motorcycle of the present invention of These characteristics, can with respect to the configuration degrees of freedom of input shaft and output shaft, set very highly shifting cam.

The accompanying drawing explanation

The following embodiment's who puts down in writing from the reference Figure of description description is clear and definite more detailed structure of the present invention, characteristics further.

Fig. 1 is the left view of motorcycle of the variable-speed motor of application embodiment of the present invention.

Fig. 2 is the left view of motor of motorcycle of the variable-speed motor of application embodiment of the present invention.

Fig. 3 is the right elevation of motor of motorcycle of the variable-speed motor of application embodiment of the present invention.

Fig. 4 means the right elevation of the variable-speed motor of embodiment of the present invention.

Fig. 5 means the sectional view of variable-speed motor of the motorcycle of embodiment of the present invention.

Fig. 6 means the dog-clutch of variable-speed motor of embodiment of the present invention and the amplification exploded perspective view of gear.

Fig. 7 means the stereogram of the motor of the variable-speed motor of applying embodiment of the present invention.

Fig. 8 means the stereogram of the variable-speed motor of embodiment of the present invention.

Fig. 9 means the left view of gear level of motorcycle of the variable-speed motor of application embodiment of the present invention.

Figure 10 means the sectional view of gear level of motorcycle of the variable-speed motor of application embodiment of the present invention.

Symbol description

1 motorcycle

2 vehicle body frames

5 front-wheels

6 steering equipment

7 trailing wheels

8 swing arms

10 motors

11 head tubes

12 main frames

13 central frames

15 seat rails

16 fuel tanks

17 jockey seats

18 back seats

19 pivots

21 footrests

22 gear levels

23 front forks

25 handles

26 outlet pipes

27 mufflers

28 driven sprockets

29 chain drive-belts

30 cases

31 crankcases

32 cylinder block

33 cylinder heads

35 cylinder head covers

36 food trays

37 clutch mechanisms

38 upper crankcases

39 lower crankcases

40,40a, 40b, 40c carriage

41 clutch cases

42 bent axles

43 variable-speed motors

45 speed change chambers

46 input shafts

The 46a spline

47 output shafts

The 47a spline

48 gearshifts

49 gearbox cases

51 elementary actuation gears

52 elementary driven gears

53 driving sprocket wheels

55 shifting cams

56 fork axles

63 clutch main bodies

65,66 gears

67 gear mesh

69,69a, 69b, 69c dog-clutch

71 shifting forks

73 bearings

75 sliding bearings

76,77 dividers

The 77a spline

78,78a, 78b, 78c claw type selector

79 shifting fork telescoping grooves

81 protuberances

82 protuberances

85 gearshift link arms

86 gearshift connecting rods

87 arms

Embodiment

The mode of execution of the variable-speed motor of motorcycle of the present invention is described referring now to Figure of description.

In addition, in the present embodiment, front and back, up and down, the expression of left and right is that to ride in jockey on motorcycle 1 be benchmark.

Fig. 1 means the left view of the motorcycle of the variable-speed motor of applying embodiment of the present invention.

In Fig. 1, motorcycle 1 has: vehicle body frame 2, be positioned at vehicle body frame 2 the place aheads front-wheel 5, by front-wheel 5 rotate the earth's axis freely be bearing in steering equipment 6 on vehicle body frame 2, be positioned at vehicle body frame 2 rears trailing wheel 7, to vehicle body frame 2 rears, extend and trailing wheel 7 axles be supported to rotation swing arm 8 freely and the motor as internal-combustion engine 10 that is positioned at the vehicle central bottom.

Vehicle body frame 2 is double-cylinder types for example, has: pairing left and right main frame 12, this pairing left and right main frame 12 in the dead astern of the head tube 11 that is positioned at front upper end to the left and right direction expand into a pair of and below retreading, extend parallel to each other; Pairing left and right central frame 13, this pairing left and right central frame 13 are connected with the rearward end of main frame 12 and roughly upwards below extension; And pairing left and right seat rail 15, this pairing left and right seat rail 15 rearward extends from the rear upper end portion of central frame 13.

Main frame 12 doubles as the fuel tank track, the fuel tank 16 of the side of being located thereon is supported, and motor 10 is suspended in to the below of fuel tank 16.The jockey seat 17 of the 15 pairs of side's of being located thereon first halfs of seat rail and be positioned at the top latter half of back seat 18 support.In addition, main frame 12 has: be erected at left and right central frame 13 the substantial middle bottom, swing arm 8 axles be supported to direction up and down swing pivot 19 freely; Be positioned at the substantial middle rear portion of left and right central frame 13 and a pair of footrest 21 that the jockey can place pin; And the gear level 22 that extends from the footrest 21 of vehicle left side.

Steering equipment 6 has: suspension fork mechanism (diagram is omitted) inside is housed and front-wheel 5 is supported to rotation pairing left and right front fork 23 freely and the handle that is positioned at front fork 23 upper end portions.The jockey utilizes handle 25 and left and right steering front-wheel 5.

Motor 10 is connected with the outlet pipe 26 that extends, the waste gas of motor 10 is discharged to rear view of vehicle.The rear end of outlet pipe 26 is connected with muffler 27.

Trailing wheel 7 has driven sprocket 28.

In addition, motorcycle 1 has: around hanging on driven sprocket 28, will be from motor 10 to trailing wheel the chain drive-belt 29 of 7 transferring power; And the fusiform case 30 that covers front part of vehicle.Case 30 reduces the resistance of air in travelling, the protection jockey blast that do not travelled.

Then, describe the motor 10 of present embodiment in detail.

Fig. 2, Fig. 3 mean left view and the right elevation of the motor of the variable-speed motor of applying embodiment of the present invention.

As shown in Figures 2 and 3, the motor 10 of present embodiment is the four-stroke multicylinder engine, is for example four-stroke in-line four cylinder motor, has crankcase 31, cylinder block 32, cylinder head 33, cylinder head cover 35, food tray 36 and clutch mechanism 37.

Crankcase 31 can be divided into two up and down by parting plane 31a, has as the upper crankcase 38 of first case halfbody with as the lower crankcase 39 of second case halfbody.In addition, crankcase 31 has motor 10 is suspended in to a plurality of carriages 40 on vehicle body frame 2.

As illustrated, cylinder block 32 is positioned at the top of upper crankcase 38, compares uprightly and leans forward slightly.Cylinder block 32 has piston (diagram omit) is accommodated to slide freely cylinder chamber (diagram is omitted) of above-below direction roughly.

Cylinder head 33 seals the top of cylinder chamber, and piston between be separated out firing chamber (diagram omit).Piston utilizes the burning of the mixed gas that periodically produces in firing chamber and moves back and forth.

Food tray 36 is arranged on the bottom of lower crankcase 39.

Clutch mechanism 37 is dry clutches.Clutch case 41 is assembled on the sidewall of crankcase 31, by the local covering of clutch mechanism 37.

Fig. 4 means the right elevation of the variable-speed motor of embodiments of the present invention.In addition, Fig. 4 takes off the diagram of clutch case 41 and clutch mechanism 37 rear expressions from motor 10.

From Fig. 2 to shown in Figure 4, in the crankcase 31 of motor 10, have bent axle 42 and variable-speed motor 43.

At first, bent axle 42 is in substantial middle in the side view of motor 10, is in the below of cylinder block 32, is in more detail near the position that the prolongation of the parting plane 31a of crankcase 31 and cylinder centerline first intersects.The spin axis of bent axle 42 is towards the width direction of motor 10.

Then, variable-speed motor 43 is modular variable-speed motors, with respect to upper crankcase 38 and lower crankcase 39, coordinates and the inside and outside integrative ground of the gearbox 45 that is separated out in crankcase 31 is installed and removed freely.Variable-speed motor 43 has input shaft 46, output shaft 47, gearshift 48 and respectively input shaft 46 and output shaft 47 axles is supported to rotation gearbox case 49 freely.

Bent axle 42, input shaft 46 and output shaft 47 have spin axis parallel to each other.Bent axle 42 will be held in to the elementary actuation gear 51 of input shaft 46 transferring power the one rotation.

Input shaft 46 is positioned at the oblique back upper place of bent axle 42 on parting plane 31a, with clutch mechanism 37, be connected.Input shaft 46 will be supported to rotation freely with elementary driven gear 52 axles of elementary actuation gear 51 engagements.

Output shaft 47 is positioned at the below (the slightly tiltedly rear lower side) of input shaft 46.Output shaft 47 be projected into crankcase 31 the left side side outside and with driving sprocket wheel 53 combinations.Driving sprocket wheel 53 is hung around on chain drive-belt 29 transmission of power to trailing wheel 7.

Gearshift 48 is positioned at the below of output shaft 47.Gearshift 48 has shifting cam 55 and fork axle 56.Shifting cam 55 is in the below of output shaft 47.Fork axle 56 is in the rear of shifting cam 55, is in the front side of the rear-most end of clutch mechanism 37 peripheries.

Input shaft 46, output shaft 47 and shifting cam 55 from top, start successively and roughly a straight line shape ground arrange, spin axis separately is in roughly in same plane.

Fig. 5 means the sectional view with the variable-speed motor of the motorcycle of the embodiment of the present invention after V-V line cut-out in Fig. 3.

As shown in Figure 5, the clutch mechanism 37 of the motor 10 of present embodiment, have the clutch main body 63 that elementary driven gear 52 is held in to the one rotation.Clutch mechanism 37 makes elementary driven gear 52 be in on-off state with input shaft 46, and rotation is changed freely or the one rotationization to reach, and carries out cut-out or the transmission of the power between bent axle 42 and input shaft 46.

Variable-speed motor 43 is so-called dog-clutch formula manual drives.Variable-speed motor 43 has: from the input shaft 46 of conduct first power transmission shaft of bent axle 42 transferring power; Output shaft 47 as the second power transmission shaft; Gear ratio separately different multiple sets of teeth wheel to 67, this gear mesh 67 have with input shaft 46 be combined into one rotation gear 65 (side's gear), and be entrenched in the gear 66 (the opposing party's gear) on output shaft 47 with gear 65 engagements and rotation activity freely; Make multiple sets of teeth wheel be in on-off state to reach rotation and freely change or a plurality of dog-clutches 69 of one rotationization to the gear 66 in 67 each group and output shaft 47; Each in a plurality of dog-clutches 69 is carried out to interrupted a plurality of shifting forks 71; And the gearbox case 49 that coordinates with crankcase 31 and input shaft 46 and output shaft 47 are carried out to the axle supporting.

One end of input shaft 46 (being right part here) keeps elementary driven gear 52 and clutch mechanism 37.The peripheral part of input shaft 46 has spline 46a.

Output shaft 47 obtains the power of motor 10 and to the outer output of variable-speed motor 43 from input shaft 46.The peripheral part of output shaft 47 has spline 47a.In addition, the movable chimeric part of gear 66 is not existed to spline 47a.

Gear 65 is with input shaft 46, to be bonded into the fixed gear of one rotation.A plurality of gears 65 are applied to respectively jack shaft low speed gear 65a, jack shaft the second gear 65b, jack shaft the 3rd gear 65c, jack shaft the 4th gear 65d, jack shaft high gear 65e and jack shaft overdrive gear 65f (following only be called " gear 65a ", " gear 65b ", " gear 65c ", " gear 65d ", " gear 65e " reaches " gear 65f ").

Gear 66 is to rotate movable chimeric with output shaft 47 freely activity chimeric (sliding embedding) gear.Gear 66 is applied to live axle low speed gear 66a, live axle the second gear 66b, live axle the 3rd gear 66c, live axle the 4th gear 66d, live axle high gear 66e and live axle overdrive gear 66f (following only be called " gear 66a ", " gear 66b ", " gear 66c ", " gear 66d ", " gear 66e " reaches " gear 66f ").

Gear 65,66 is carrying out between the pairing left and right bearing 73 of axle supporting input shaft 46 and output shaft 47 respectively.

Variable-speed motor 43, be utilize meshed gears 65a and gear 66a, gear 65b and gear 66b, gear 65c and gear 66c, gear 65d and gear 66d, gear 65e and gear 66e and gear 65f and gear 66f all the time to and can carry out six grades of speed changing type variable-speed motors of the speed change of 1 speed to 6 speed.

Below, gear 65,66 is described in detail in detail.

Gear 65b be in the rightmost side and with the gear of input shaft 46 one.Gear 65a is in the leftmost side, and gear 65c is in second position that starts from left side, and gear 65d is in second position that starts from right side, and gear 65e is in the 3rd position that starts from left side, and gear 65f is in the 3rd position that starts from

right side.Gear

65b, 65c, 65d, 65e, 65f utilize input shaft 46 spline 46a and with input shaft 46 rotation that is combined into one.

On the other hand, gear 66a is in the leftmost side, gear 66b is in the rightmost side, gear 66c is in second position that starts from left side, gear 66d is in second position that starts from right side, gear 66e is in the 3rd position that starts from left side, and gear 66f is in the 3rd position that starts from right side.Sliding bearing 75 rotates the earth's axis freely by gear 66 and is bearing on output shaft 47.

In addition, variable-speed motor 43 has the divider 76,77 of the sleeve-shaped that is clipped between adjacent gear mesh 67 and the movement of the spin axis direction of described a plurality of gear mesh is limited.

Divider 76 is clipped between each gear 65, to leaving apart from retraining of 65 of adjacent gear.Divider 76 has the through hole that inserts input shaft 46, embed spline 46a and with input shaft 46 one rotations.

Divider 77 is clipped between each gear 66, to leaving apart from retraining of 66 of adjacent gear.Divider 77 has the through hole that inserts output shaft 47, embed spline 47a and with output shaft 47 one rotations.In addition, the interior peripheral part of divider 77 has spline 77a.

Dog-clutch 69 is applied to make gear 66a or gear 66c and output shaft 47 to be in on-off state to reach rotation and freely change or the dog-clutch 69a of one rotationization, to make gear 66b or gear 66d and output shaft 47 be in on-off state to reach rotation and freely change or the dog-clutch 69b of one rotationization, to make gear 66e or gear 66f and output shaft 47 be in on-off state to reach rotation and freely change or the dog-clutch 69c of one rotationization.In addition, dog-clutch 69 has the claw type selector 78 that is positioned at 66 of mutually adjacent gears.Claw type selector 78 and state and divider 77 combinations can to the spin axis direction of output shaft 47 to slide chimeric with spline 77a.In addition, claw type selector 78 has the shifting fork telescoping groove 79 that inserts shifting fork 71.

Claw type selector 78 is applied at the claw type selector 78a between gear 66a and gear 66c, at the claw type selector 78b between gear 66b and gear 66d and the claw type selector 78c between gear 66e and gear 66d.

Fig. 6 is the exploded perspective view that the claw type selector of the variable-speed motor of embodiment of the present invention and gear are amplified to expression.

As shown in Figure 6, dog-clutch 69 has a plurality of protuberances 81 and the recess 82 that can interosculate, break away from claw type selector 78 and gear 66.Protuberance 81 and recess 82 are positioned at roughly equally spaced position on circumferentially separately claw type selector 78 and gear 66.

In addition, in Fig. 6, omit the tooth of expression gear 66.

Fig. 7 means the stereogram of the motor of the variable-speed motor of applying embodiment of the present invention, is variable-speed motor 43 to be fetched into to the diagram of speed change chamber 45 outer rear expressions.

Fig. 8 means the stereogram of the variable-speed motor of embodiment of the present invention, is gearbox case 49 to be taken off to the diagram of the variable-speed motor 43 of rear expression.In addition, Fig. 7 and Fig. 8 omit the gear of expression gear.

As shown in Figures 7 and 8, the gearshift 48 of the variable-speed motor 43 of present embodiment has: a plurality of shifting forks 71; Shifting fork 71 axles are supported to the direction slip fork axle 56 freely to the spin axis almost parallel with output shaft 47; A plurality of shifting forks 71 are moved and multiple sets of teeth wheel is carried out to the optionally shifting cam 55 of transferring power to a certain group in 67.

Shifting fork 71 is than by the envelope of gear mesh 67 rear-most ends, entering slightly front side up and down, and extends to claw type selector 78 from fork axle 56.

The periphery of shifting cam 55 has the gearshift groove paired with each shifting fork 71 (diagram is omitted).Shifting cam 55 utilizes the operation of gear level 22 and rotates, and shifting fork 71 slides along the gearshift groove, dog-clutch 69 and gear 66 optionally is connected and can carries out to the transmission of power of input shaft 46 and output shaft 47.

On the other hand, crankcase 31 has: be positioned at the carriage 40a of variable-speed motor 43 left backs, the carriage 40c that is positioned at the carriage 40b of variable-speed motor 43 right backs and is positioned at variable-speed motor 43 belows.

Carriage

40a, 40b and carriage 40c coordinate and motor 10 are suspended on vehicle body frame 2 with other carriage 40 of crankcase 31.Especially, carriage 40a is in the position nearest with driving sprocket wheel 53, and the counter-force that acts on the tension load of output shaft 47 from chain drive-belt 29 is given to the most powerful support.

As Fig. 7 and shown in Figure 3, carriage 40a is in and chain drive-belt 29 and the very near position of output shaft 47.Variable-speed motor 43, be positioned at the below of output shaft 47 by making gearshift 48, and do not configure any axle etc. at the rear of output shaft 47, thereby the wall that can make crankcase 31 makes carriage 40a close to chain drive-belt 29 and output shaft 47 as far as possible close to output shaft 47.

Fig. 9 means the left view of gear level of motorcycle of the variable-speed motor of application embodiment of the present invention, and Figure 10 means the sectional view of gear level of the motorcycle of the application variable-speed motor after the X-X line by Fig. 9 cuts off.

As shown in FIG. 9 and 10, the gear level 22 of the motorcycle 1 of present embodiment has the spin axis coaxial with footrest 21, has the brachium that available jockey's tiptoe T swings.

On the other hand, the shifting cam 55 of variable-speed motor 43 has gearshift link arm 85.Due to shifting cam 55, be positioned at the foot of variable-speed motor 43, therefore gearshift link arm 85 also is in low-down position in motor 10 integral body.

And gear level 22 and gearshift link arm 85, utilize the below be positioned at footrest 21 the gearshift connecting rod 86 that extends and connect.Gearshift connecting rod 86 forms linkage mechanism together with arm 87 that rotation base portion from gearshift link arm 85 and gear level 22 hangs down, the swing of gear level 22 is delivered to shifting cam 55 and makes shifting cam 55 rotations, impels variable-speed motor 43 speed changes.

When at the physique according to the jockey, the position of footrest 21 being changed or adjusting, gear level 22 moves together with footrest 21, and the distance change between gear level 22 and gearshift link arm 85 is that the length adjustment of gearshift connecting rod 86 is dealt with.Because even the spin axis of gear level 22 moves, gearshift connecting rod 86 also must be positioned at the below of jockey's pin, therefore this reply becomes possibility, and this reply is because the interference of needn't consider to shift gears connecting rod 86 and jockey's pin.

In addition, variable-speed motor 43, the combination that can suitably replace input shaft 46 and output shaft 47, gear 65 and gear 66.Specifically, variable-speed motor 43 also can have gear ratio, and different multiple sets of teeth wheel is to 67 separately, and this gear mesh 67 has with the gear 65 (side's gear) of output shaft 47 one rotations, and with gear 65 engagements and on input shaft 46, rotate gear 66 (the opposing party's gear) freely.In this case, output shaft 47 is first power transmission shafts, and input shaft 46 is second power transmission shafts.

Adopt the variable-speed motor 43 of the motorcycle 1 of above-mentioned present embodiment, have following such effect and advantage.

That is, upper at output shaft 47 (or input shaft 46) by by the chimeric gear of activity, being gear 66 and the whole centralized configuration of dog-clutch 69, thus can configure peripherally whole shifting forks 71 near output shaft 47 (or input shaft 46).This can, by not only comprising shifting fork 71 but also comprising the periphery of gearshift 48 configured in one piece of shifting cam 55 at output shaft 47 (or input shaft 46), make the tremendous raising of configuration degrees of freedom of gearshift 48.Specifically, variable-speed motor 43, in can avoiding the scope of interfering with bent axle 42 and input shaft 46 (or output shaft 47), can be configured in gearshift 48 output shaft 47 (or input shaft 46) any position on every side and go up mutually.

In addition, the variable-speed motor 43 of the motorcycle 1 of present embodiment, by improving the configuration degrees of freedom of gearshift 48, thereby just gearshift 48 can be configured in to the below etc. of output shaft 47, and wall and the carriage 40a of the rear side of crankcase 31 are configured close to output shaft 47 ground as far as possible.Thus, variable-speed motor 43 can shorten by the arm of force that the tension load with act on output shaft 47 from transfer mechanisms such as chain drive-belt 29 or driving belts is corresponding as far as possible, and suppresses the flexural stress that produces on crankcase 31, can guarantee the smooth action of variable-speed motor 43.

In addition, the variable-speed motor 43 of the motorcycle 1 of present embodiment, by improving the configuration degrees of freedom of gearshift 48, thereby gearshift 48 can be configured in to the below of output shaft 47 etc., gearshift connecting rod 86 is configured in to the lower side of footrest 21, can gets rid of jockey's pin and the possibility of gearshift connecting rod 86 interference.Can be configured and can not be subject to avoiding jockey's pin and the constraint of this restriction condition of gearshift connecting rod 86 interference to footrest 21 and gear level 22.Specifically, when variable-speed motor 43 changes or adjusts the position of footrest 21 at the physique according to the jockey, gear level 22 can be moved together with footrest 21, improve operability and the operation sense of gear level.

Also have, the variable-speed motor 43 of the motorcycle 1 of present embodiment, by from top, configuring successively input shaft 46, output shaft 47 and gearshift 48, thereby can shorten the front and back length of motor 10, is conducive to the miniaturization of motorcycle 1 integral body.

Also have, the variable-speed motor 43 of the motorcycle 1 of present embodiment, by from top, configuring successively input shaft 46, output shaft 47 and gearshift 48, thereby the lubricant oil in the gearbox 45 that drips can be supplied to input shaft 46, output shaft 47 and gearshift 48 reliably, be lubricated.

Yet, variable-speed motor in the past, but owing to having moving gear and the so-called power shift gear of claw type selector shape all-in-one-piece, therefore, when the gear mesh to transferring power changes (being speed change), power shift gear is slided to the spin axis direction, and the chimeric gear of activity that will be adjacent with this power shift gear gives the one rotationization with the axle that is rotated.Because but moving gear and movable chimeric gear mesh all the time, therefore, the needed power of the slip of this power shift gear becomes the rotary load of shifting cam, namely becomes the load of the steering force of gear level.

Variable-speed motor in the past, owing to utilizing shifting fork power shift gear to be rotated to the location of axial direction, therefore, during to gearshift gearing load, the slip surface layer of shifting fork and power shift gear produces and weares and teares sometimes when input shaft or output shaft being applied to larger power etc.

But, the variable-speed motor 43 of the motorcycle 1 of present embodiment, owing to by the chimeric gear of activity, being that gear 66 and the whole centralized configuration of dog-clutch 69 are on output shaft 47 (or input shaft 46), therefore, claw type selector 78 and gear 65,66 become the split part separately, and the engagement of gear mesh 67 can not have influence on the load of the steering force of the rotary load of slip, shifting cam 55 of claw type selector 78 and gear level 22.

In addition, the variable-speed motor 43 of the motorcycle 1 of present embodiment, by by the chimeric gear of activity, being that gear 66 and the whole centralized configuration of dog-clutch 69 are on output shaft 47 (or input shaft 46), claw type selector 78 and gear 65,66 are made to the split part separately, thereby just can carry out speed change and gear 65,66 is slided.Namely, shifting fork 71 can position and can not loaded from gear 65,66 sides claw type selector 78, than variable-speed motor in the past, the power that is applied on the slip surface of shifting fork 71 and claw type selector 78 reduces, and suppresses the wearing and tearing of shifting fork 71 and claw type selector 78.

Therefore, adopt the variable-speed motor 43 of the motorcycle 1 of present embodiment, can improve with respect to input shaft 46 and output shaft 47 the configuration degrees of freedom of shifting cam 55.

In addition, the invention is not restricted to the embodiments described, and in the scope that the present invention asks for protection, other change and fixed case are also contained in scope of the present invention.

Claims

1. the variable-speed motor of a motorcycle, is characterized in that, has:

The first power transmission shaft, this first power transmission shaft is any one party in input shaft and output shaft, for transmitting the power from bent axle;

The second power transmission shaft, this second power transmission shaft are any the opposing party in described input shaft and described output shaft;

The multiple sets of teeth wheel is right, and the gear ratio of this gear mesh is different separately, has with side's gear of described the first power transmission shaft one rotation and meshes and rotation the opposing party's gear freely on described the second power transmission shaft with described side's gear;

A plurality of dog-clutches, this dog-clutch make described multiple sets of teeth wheel be in on-off state to described the opposing party's gear and described the second power transmission shaft in each group, and rotation is changed freely or the one rotationization to reach;

A plurality of shifting forks, this shifting fork carries out transmission of power intermittently to each in described a plurality of dog-clutches; And

Shifting cam, this shifting cam move described a plurality of shifting fork, can carry out optionally transmission of power to a certain group of described multiple sets of teeth wheel centering.

2. the variable-speed motor of motorcycle as claimed in claim 1, is characterized in that, also has the divider that is clipped between adjacent described gear mesh and the movement of the right spin axis direction of described multiple sets of teeth wheel is limited.

3. the variable-speed motor of motorcycle as claimed in claim 1, is characterized in that, the spin axis of described the first power transmission shaft, described the second power transmission shaft and described shifting cam is in roughly in same plane.

4. the variable-speed motor of motorcycle as claimed in claim 1, is characterized in that, described shifting cam is in the below of described the first power transmission shaft.

5. the variable-speed motor of motorcycle as claimed in claim 1, is characterized in that, described shifting cam is in the below of described the second power transmission shaft.

6. the variable-speed motor of motorcycle as claimed in claim 1, is characterized in that, described shifting cam is in the below of described bent axle.