JP3140538B2 - Component Arrangement Structure of Power Transmission Device in Saddle-ride Type Vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for arranging components of a power transmission device including a transmission in a straddle type vehicle such as a motorcycle.

[0002]

2. Description of the Related Art Conventionally, as a structure for disposing components of a power transmission device for a motorcycle, there is a structure disclosed in Japanese Patent Publication No. Sho 61-13093.

According to this, an engine crankcase is disposed between front and rear wheels, and a transmission is provided on one side of the crankcase. This transmission includes a drive pulley connected to the crankshaft side, a driven pulley located behind the drive pulley and behind the crankcase, and a V-belt wound around both pulleys. , Clutch and reduction gear on the driven pulley side
And the rear wheel is connected through the connection.

[0004] The power of the engine is transmitted to the rear wheels via a transmission , a clutch , and a reduction gear so that the motorcycle can run.

[0005]

By the way, in the above-mentioned conventional structure, a gear type speed reducer is provided in a space of a corner portion sandwiched between a crankcase and a driven pulley. Is small. For this reason, there is a disadvantage that the outer shape of the power transmission device is increased due to the extra space being generated due to the insufficient use of the space.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a compact power transmission device for a saddle-ride type vehicle , and has a good left-right weight balance of the vehicle body. an object of the present invention is to to be was coercive.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized in that front and rear wheels 11, 1 are provided.
The crankcase 22 of the engine 21 is arranged between the six
A transmission 58 is provided on one side of the crankcase 22 of
This transmission 58 is connected to a drive connected to the crankshaft 43 side.
A moving pulley 64, and
The driven pulley 6 located rearward of the crankcase 22
6 and a V-belt wound around these pulleys 64 and 66.
And a clutch 67 on the driven pulley 66 side.
The rear wheel 16 is connected via a reduction gear 59 and a reduction gear 60.
In the structure for disposing the components of the power transmission device in a saddle type vehicle
And

The crankcase 22 and the driven pulley 66
In the space 84 of the sandwiched by the corners in and, above Symbol clutch 59 and the reduced
The speed device 60 is arranged side by side in the vehicle body width direction.
The rank case 22 and the clutch 59 are substantially aligned in the vehicle width direction.
Placed in the center,

The clutch 59 and the speed reducer 60 are both
It is housed inside the clutch case 85 and
Approach

The clutch 59 is made wet, and
The point is that the speed reducer 60 is a gear type .

[0011]

[Operation] The operation of the above configuration is as follows.

Since the width of the crankcase 22 of the engine 21 is usually large,
The driven pulley 6 of the transmission 58 located on one side of the crankcase 22 and on the rear side of the crankcase 22
The space 84 at the corner sandwiched by 6 is a sufficiently large space.

In the present invention, in the space 84 ,
Since the clutch 59 and the speed reducer 60 are provided side by side , the clutch 59 and the speed reducer 60 have a large power transmission capacity.
That is, even those of the outer shape larger than the these clutches 59 and a reduction unit 60 is easily accommodated in the space 84, the space 84 is Ru are effectively utilized.

Moreover, the crankcase 22 and the
H 59 is heavy, but these 22 and 5
9 Yes disposed substantially at the center of the vehicle width direction, therefore, the car
Left and right body weight balance is well maintained.

Further , in the above configuration, the clutch 5
9 and reduction gear 60 together inside clutch case 85
They are housed and approach each other in the vehicle width direction.

Therefore, the clutch 59 and the speed reducer 6
0, there is no partition between them,
0 is compacted in the space 84.

Also, when the clutch 59 is made wet,
In addition, the speed reducer 60 is of a gear type.

That is, as described above, the clutch 59 is reduced.
The speed device 60 is housed inside the clutch case 85 together.
And approach each other, as described above
The clutch 59 is of a wet type.
Due to a part of the lubricating oil supplied to the clutch 59,
The gear type reduction gear 60 can also be lubricated.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 2 and 3, reference numeral 1 denotes a motorcycle as an example of a saddle type vehicle, and reference numeral 2 denotes a body frame.
In the drawings, the arrow Fr indicates the front of the vehicle body, and left and right refer to the width direction of the vehicle body toward the front.

The body frame 2 has a head pipe 3 at a front portion thereof. A main frame 4 extends rearward and downward from the head pipe 3 and a rear arm bracket extends further downward from a rear end of the main frame 4. 5 is extended. Below the main frame 4, a down tube 6 extends rearward and downward from the same head pipe 3, and a rear end of the down tube 6 and a lower end of the rear arm bracket 5 are connected to each other. 7 is a seat rail, and 8 is a back stay.

A front fork 10 is supported on the head pipe 3 so as to be steerable. A front wheel 11 is supported at a lower end of the front fork 10, and a handle 12 is attached to an upper end of the front fork 10.

The rear arm bracket 5 has a pivot 1
4, a rear arm 15 is pivotally supported so as to be able to swing up and down, and a rear wheel 16 is supported at the swinging end of the rear arm 15. Further, a shock absorber 19 is provided between the rear end of the main frame 4 and the front and rear halfway of the rear arm 15 via a link mechanism 18.
Has been erected.

An engine 21 is supported on the body frame 2. This engine 21 has a crankcase 22 and a cylinder 23 made of an aluminum alloy. A carburetor 24 and an air cleaner 25 are connected to an intake port provided on the rear surface of the cylinder 23.

One end of an exhaust pipe 26 is connected to an exhaust port provided on the front surface of the cylinder 23. The other end of the exhaust pipe 26 once extends forward and downward from the cylinder 23, then bends to the left and further to the right, and the folded portion 27 is located on the front side of the down tube 6. I have. The folded end of the folded portion 27 extends rearward, and a silencer 28 is attached to the rear end.

A power transmission device 30 is connected to a rear portion of the crankcase 22. The power transmission device 30 has a drive chain 31 as an output portion. On the other hand, a driven wheel 32 is attached to the rear wheel 16, and a chain 33 is wound around the drive wheel 31 and the driven wheel 32. The power of the engine 21 can be transmitted to the rear wheel 16 via the power transmission device 30, the chain 33, and the like. The driving of the rear wheel 16 causes the motorcycle 1 to travel on a traveling road surface 35.

The engine 21 and the power transmission device 3
0 is supported by the body frame 2 by the pivot shaft 14 having a bolt shape and three bolts 36.
37 is a fuel tank and 38 is a seat. Reference numeral 39 denotes a pair of left and right footrests.
Are located at the rear of the right side of the power transmission device 30 and protrude outward from the lower ends of the rear arm brackets 5, respectively. The rider on the seat 38 places a foot 40 on the footrest 39 as shown in FIG.

1 and 4, the crankcase 22 includes left and right cases 41 and 42 fastened to each other.
A crankshaft 43 having an axial center extending left and right is supported by these two cases 41 and 42. 44 is a connecting rod. The crankcase 22 has a cover case 46, which covers the left side surface of the left case 41. A flywheel magneto 47 is provided in a space between the left case 41 and the cover case 46, and a rotor 48 of the flywheel magneto 47 is supported on the left end of the crankshaft 43.

Reference numeral 50 denotes a kick-type starter. The kick-type starter 50 includes the left case 41 and the cover case 46.
And a kick shaft 51 supported by the shaft. A kick pedal 52 is attached to the kick shaft 51, and a spring 53 for holding the kick pedal 52 in a predetermined posture is provided. On the other hand, an engagement shaft 54 is supported on the cover case 46 coaxially with the rotor 48, and the engagement shaft 54
Is connected to the kick shaft 51 by a gear set 55.

The shaft end of the engagement shaft 54 is connected to the rotor 48
The engagement shaft 54 is normally urged by a spring 56 to release the engagement with the rotor 48. When the engine 21 is to be started, the kick pedal 52 is depressed vigorously against the spring 53. Then, this power is transmitted to the engagement shaft 54 via the kick shaft 51 and the gear set 55, and the engagement shaft 5
4 rotates. In addition, a part of the power when the kick pedal 52 is depressed, the engaging shaft 54 moves toward the rotor 48 and engages against the spring 56, whereby cranking is performed. When the depression is released, the kick pedal 52 and the engagement shaft 54 return to their original states by the springs 53 and 56.

In FIG. 1, the power transmission device 30 includes a transmission 58, a clutch 59, and a reduction gear 60, and the power from the engine 21 is transmitted to the drive chain 31 in this order.

The transmission 58 will be described with reference to FIGS.

The transmission 58 is a V-belt winding mechanism 61
And a transmission case 6 having the V-belt winding mechanism 61 inside.
The transmission case 62 includes a part of the right case 42 and an extension case 4 extending rearward from the right case 42.
2a, and a speed change cover case 63 made of an aluminum alloy and covering the right side surfaces of the right case 42 and the extension case 42a.

The V-belt winding mechanism 61 will be described.
A drive shaft 43a integrally formed on the right end of the crankshaft 43 is supported coaxially with the drive shaft 43a, and a drive pulley 64 is supported on the drive shaft 43a. An intermediate shaft 65 is supported at a rear portion in the transmission case 62, and a driven pulley 66 is supported by the intermediate shaft 65. A V-belt 67 is wound around the driving pulley 64 and the driven pulley 66.

The drive pulley 64 has a pair of left and right drive faces 64a and 64b forming a V-belt groove 69.
These drive faces 64a and 64b are connected to the drive shaft 43a.
Is spline-fitted so that it can slide in the axial direction. The driven pulley 66 has a pair of left and right driven faces 66a, 66b forming a V-belt groove 70. The driven faces 66a, 66b are spline-fitted to the intermediate shaft 65 so as to be slidable in the axial direction. .

A pair of left and right interlocking bars 71, 71 are provided on the left and right outer sides of the driving pulley 64 and the driven pulley 66, respectively. The middle part before and after each of these two interlocking bars 71, 71
The pivot pin 72 and the connection bar 73 are connected to each other, and each interlock bar 71 is swingable around the pivot pin 72.

The front portion of each interlock bar 71 is connected to the corresponding drive faces 64a and 64b by front connection pins 74, respectively. In this case, each drive face 64a, 6
4b is the driving shaft 43 regardless of the movement of the interlocking bar 71.
Although it is rotatable together with a, it moves together with the front part of the interlock bar 71 to the left and right.

The rear part of each interlock bar 71 is connected to the corresponding driven faces 66a and 66b by rear connection pins 75, respectively. In this case, each driven face 66
a and 66b are independent of the interlocking bar 71,
, And can move together with the front part of the interlocking bar 71 to the left and right. Reference numeral 76 denotes a tension pulley. The tension pulley 76 is pressed against the V-belt 67 by the elastic force of a spring to prevent the V-belt 67 from loosening.

A driving means 78 for swinging each of the interlocking bars 71 around the pivot pin 72 is provided. The drive means 78 has a speed change drive shaft 79 supported on the front of the speed change case 62. On the speed change drive shaft 79, a pair of left and right oppositely threaded nuts 80, 80 are slidable in the axial direction. Key binding. The front ends of the interlocking bars 71 are screwed to the corresponding nuts 80, respectively. Also, three springs 81 are provided to bias the nuts 80 so as to sandwich them from the left and right.

A step motor 82 is attached to the front outer surface of the speed change cover case 63, and the speed change drive shaft 79 is connected to an output shaft 83 of the step motor 82.

When the stepping motor 82 is driven to rotate the speed change drive shaft 79, for example, in the direction indicated by the arrow A in FIG. 5, the left and right sides of each of the nuts 80 and the front end of each of the interlocking bars 71 are rotated. The position changes relatively, that is,
The front ends of the interlocking bars 71 are separated from each other as shown by an arrow B in FIG. Then, the left and right driving faces 64a and 64b are separated from each other, and the V-belt groove 69
And the winding diameter of the V-belt 67 is smaller.

As a reaction to this, each interlocking bar 7
The rear ends of the 1 approach each other as shown by an arrow C in FIG. Then, with this, the left and right driven faces 66a, 6
6b approach each other, and the diameter of the V belt 67 wound around the V belt groove 70 increases.

As a result, the speed reduction ratio in the transmission 58 increases, that is, the output shaft 83 is decelerated.

Conversely, when the stepping motor 82 is driven to rotate the speed change drive shaft 79 in the opposite direction (in the direction opposite to the arrow A), the above operation is performed in reverse, and the transmission The reduction ratio at 58 becomes smaller, that is, the output shaft 83 is increased in speed.

In the above case, the side of the front outer surface on the right side of the speed change cover case 63 is directed from the front to the rear without the hindrance of the transmission 58.
Is a part that is easy to flow smoothly.

According to this embodiment, the stepping motor 82 is mounted on the front outer surface on the right side of the speed change cover case 63. For this reason, the step motor 82 is likely to be heated to a high temperature by driving, but is effectively cooled by the traveling wind 84.

In contrast to the footrest 39 provided behind the right side of the speed change cover case 63, the step motor 82 is mounted on the front outer surface of the right side of the speed change cover case 63. The step motor 82 is located at a distance from the footrest 39 in the front-rear direction, so that the step motor 82 is prevented from interfering with the rider's foot 40 on the footrest 39.

Further, a folded portion 27 of the exhaust pipe 26 is provided near the front of the step motor 82, so that the step motor 82 is protected by the folded portion 27.

1 and 6, the clutch 59 will be described.

The clutch 59 is connected to the crankcase 22 of the engine 21 and the driven pulley 66 of the transmission 58.
Are disposed in the space 84 at the corner between the two. In this case, since the width of the crankcase 22 is large, the space 84 is sufficiently large. And
Since the clutch 59 is provided in the space 84 as described above, the clutch 59 has a large power transmission capacity.
In other words, even if the outer shape of the clutch 5 is large,
9 is easily stored in the space 84, and the space 84 is effectively used. And, as described above, by effectively utilizing the space 84, the clutch 5
The power transmission device 30 is compact because there is no need to separately provide an installation space for the power transmission device 9.

Since the crankcase 22 is heavy, the crankcase 22 is disposed substantially at the center on the left and right sides of the vehicle body in view of the left-right balance of the vehicle body. The clutch 59 is a wet-type multi-plate clutch, and this clutch 59 is provided near the rear of the crankcase 22 as described above. In other words, the clutch 59 also distribution to the left and right substantially in the center of the vehicle body together with the crankcase 22
It is location, therefore, there is a heavy the clutch 59 is a wet multi-plate type, but the right and left weight balance of the vehicle body is kept good.

In the space 84, the clutch 59 and the decelerator are decelerated.
The device 60 is arranged side by side in the vehicle width direction.
Are both housed inside the clutch case 85 ,
They are moved closer to each other in the width direction of the vehicle. The clutch case 85 includes the extension case 42a and the left case 4
1 and an extension case 41a extending rearward.

The left end of the intermediate shaft 65 faces the inside of the clutch case 85, and a disk 86 is formed integrally with the left end of the intermediate shaft 65. A pair of projections 86a are formed on the outer peripheral surface of the disk 86 at radially symmetric positions.
Is detected.

The disk 86 has a clutch outer 87
A plurality of friction plates 88 are slidably fitted in the clutch outer 87 only in the axial direction. On the other hand, an output shaft 90 is supported on the clutch case 85 and the left end of the intermediate shaft 65 coaxially with the intermediate shaft 65. A cylindrical driven shaft 91 is coaxially supported on the output shaft 90, and the driven shaft 91
The output shaft 90 is connected via the.

A plurality of clutch plates 93 are externally slidably fitted in the clutch inner 92 only in the axial direction, and the friction plates 88 and the clutch plates 93 are alternately arranged in the axial direction.

When the friction plate 88 and the clutch plate 93 are separated from each other (disconnection operation), the power transmission is cut off. When the friction plate 88 and the clutch plate 93 are frictionally connected to each other (connection operation), the output shaft 90 is moved from the intermediate shaft 65 side. Power is transmitted to the side.

A pressure plate 94 is provided on the right side of the combination of the friction plate 88 and the clutch plate 93, and the pressure plate 94 is fitted in the clutch outer 87 so as to be slidable in the axial direction. An intermediate plate 95 is interposed between the pressure plate 94 and the inner surface of the clutch outer 87, and an intermediate spring 96 is interposed between the pressure plate 94 and the intermediate plate 95.

The inner surface of the clutch outer 87 is formed with an inclined surface 87a. The space between the inclined surface 87a and the intermediate plate 95 has such a shape that the width becomes narrower as it goes radially outward in a side view. A spherical weight 97 is interposed in this space, and a separation spring 98 for urging the friction plate 88 and the clutch plate 93 to separate from each other is provided.

When the rotation speed of the intermediate shaft 65 is equal to or less than a predetermined number of revolutions, the centrifugal force generated in the weight 97 is small. The cutting operation is performed (in FIG. 6, the pressure plate 94, the intermediate plate 95, and the front half of the weight 97 are illustrated).

On the other hand, when the rotation speed of the intermediate shaft 65 is equal to or higher than the predetermined rotation speed, the centrifugal force generated in the weight 97 increases, and therefore, the weight 97 is
Is moved radially outward, and the intermediate plate 95 is pushed leftward against the separation spring 98. Then, along with this, the pressure plate 94 is pushed to the left via the intermediate spring 96, and the pressure plate 94 frictionally connects the friction plate 88 and the clutch plate 93, whereby the clutch 59 is connected (FIG. 6, at the rear half of the pressure plate 94, intermediate plate 95, weight 97, etc.).

When the speed of the intermediate shaft 65 falls below the predetermined rotational speed again, the clutch 59 performs the disconnecting operation again.

The rear end of the cover case 46 extends rearward to form an extension case 46a.
The left end of the output shaft 90 is supported by a. The drive chain 31 is attached to the output shaft 90 between the extension case 41a of the left case 41 and the extension case 46a of the cover case 46. The output shaft 90 has a through hole 101 formed on the axis thereof.
A first operation shaft 102 is fitted in the first operation shaft 101 so as to be slidable in the axial direction.

The right end of the first operation shaft 102 is a sphere 103
Through the pressure plate 94. An operating hole 104 is formed in the extension case 46a corresponding to the left end of the first operating shaft 102, and a second operating shaft 105 is fitted into the operating hole 104 so as to be rotatable around its axis. A semicircular portion 106 is formed in the middle of the second operation shaft 105, and the semicircle portion 106 is engaged with and disengaged from the left end of the first operation shaft 102 by the rotation of the second operation shaft 105. ing.

The second operation shaft 105 is connected to the handle 1
2 is connected to a clutch lever (not shown) provided corresponding to the left grip. When the clutch lever is rotated by gripping, the semicircular portion 106 is moved to the first position.
The first operating shaft 102 is engaged with the left end of the operating shaft 102 and pushes the first operating shaft 102 rightward against the intermediate spring 96. Then, the first operation shaft 102 is moved through the sphere 103 to the pressure plate 94.
Is pushed rightward to separate the friction plate 88 and the clutch plate 93 from each other, and the clutch 59 is disengaged in the same manner as described above. In other words, even when the intermediate shaft 65 is at or above the predetermined rotational speed and the clutch 59 is engaged by the action of the weight 97 as described above, the clutch 59 can be disengaged by operating the clutch lever. Can be.

In FIGS. 1 and 6, the speed reducer 6
Numeral 0 denotes a planetary gear type provided coaxially with the output shaft 90. The reduction gear transmission 60 includes a ring gear 108 attached to the extension case 41 a of the left case 41, a sun gear 109 formed on the driven shaft 91, a carrier 110 spline-fitted to the output shaft 90,
And a planetary gear 111 that meshes with the ring gear 108 and the sun gear 109.

The speed reducer 60 is also housed in the space 84 coaxially with the clutch 59.

4 and 6, the left case 41 and its extension case 41a and the cover case 46 and its extension case 46a are detachably screwed with bolts 113, and an aluminum gasket is provided between the two. 114 is provided. 115 is a knock pin.

In FIG. 6, a bearing 116 for supporting the intermediate shaft 65 with respect to the extension case 42a of the right case 42,
A lubricating device is provided to lubricate the left end of the intermediate shaft 65 and a bearing 117 for supporting the output shaft 90.

The bottom of the clutch case 85 serves as an oil reservoir for lubricating oil, and the oil reservoir constantly holds the lower portions of the friction plate 88 and the clutch plate 93 in an oil bath.

3 and 6, the lubricating oil scooped up by the friction plate 88 and the clutch plate 93 is formed in an oil passage 121 formed in the extension case 41a of the left case 41 and the extension case 46a of the cover case 46.
Is supplied to the operation hole 104 through the hole. A spiral oil groove 122 is formed on the outer peripheral surface of the second operation shaft 105, and an oil groove 123 extending in the axial direction is also formed on the inner peripheral surface at the right end of the through hole 101. Also,
An oil hole 124 penetrating in the radial direction is formed in the output shaft 90, and an oil hole 125 is also formed in the clutch inner 92 corresponding to the oil hole 124.

The lubricating oil which has naturally flowed down to the operation hole 104 through the oil passage 121 as shown by an arrow E in FIG. From the hole 104 to the through hole 101, the oil groove 122,
Then, the oil flows through the oil holes 124 and 125 between the friction plate 88 and the clutch plate 93 to lubricate them. As shown by an arrow G in FIG. 6, part of the lubricating oil 118 in the through-hole 101 lubricates the bearing portion 117 through the oil groove 123 .

In FIG. 6, a rib 127 protrudes from the inner surface of the extension case 42a of the right case 42, and a guide notch 128 and an oil hole 129 following the rib 127 are formed. The lubricating oil scraped up by the projection 86a of the disk 86, the clutch outer 87, etc.
As shown by the middle arrow H, the rib 127, the guide notch 1
28, and through the oil hole 129, is guided to the bearing portion 116 to lubricate it.

[0073] In FIGS. 1 and 5, the right side surface of the front Symbol speed change cover case 63 water pump 131 is mounted, the water pump 131 is driven by the drive shaft 43a.
The water pump 131 circulates cooling water to cool the cylinder 23.

Although the above description is based on the illustrated example, the saddle type vehicle may be a three- or four-wheel vehicle in addition to a two-wheel vehicle.

[0075]

According to the present invention, the following effects can be obtained.

That is, since the width of the crankcase of the engine is usually large, the crankcase is sandwiched between the crankcase and a driven pulley of the transmission located on one side of the crankcase and behind the crankcase. The corner space is a sufficiently large space.

[0077] In the present invention, in the space, because was arranged a clutch and reduction gear, the clutch and reduction
Speed device of the power transmission capacity large, i.e., be of a contour larger than the these clutches and reduction gear are easily accommodated in the space, this space Ru effectively utilized. Therefore, by effectively utilizing the space in this way, the power transmission device becomes compact because it is not necessary to separately provide a space for installing the clutch and the reduction gear .

Further, although the crankcase and the clutch are heavy , they are disposed substantially at the center in the width direction of the vehicle body, so that the right and left weight balance of the vehicle body is good.
Is kept.

Further , in the above configuration, the clutch and
With the reduction gear and the gearbox both housed inside the clutch case,
They are close together in the width direction.

For this reason, the clutch and the speed reducer are
The space has been made more compact, and the power transmission
It becomes more compact.

In addition to making the clutch wet,
This is the reduction gear.

That is, as described above, the clutch and the reduction gear
The clutch and the housing together inside the clutch case and
When the clutch is brought closer,
It was wet and therefore supplied to this clutch.
Some of the lubricating oil used also lubricates the gear type reduction gear.
It is slippery.

Therefore, the power transmission device can be made compact.
As a result, the lubrication of the reduction gear is simple with a simple structure.
Achieved.

[Brief description of the drawings]

FIG. 1 is a simplified plan sectional view of an engine and a power transmission device.

FIG. 2 is an overall left side view of the motorcycle.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a partially enlarged view of FIG. 1;

FIG. 5 is a partially enlarged view of FIG. 1;

FIG. 6 is a partially enlarged view of FIG. 1;

[Explanation of symbols]

Reference Signs List 1 motorcycle (vehicle) 11 front wheel 16 rear wheel 21 engine 22 crankcase 30 power transmission device 43 crankshaft 58 transmission device 59 clutch 60 reduction device 64 drive pulley 66 driven pulley 67 V belt 84 space 85 clutch case

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B62M 9/08 F02B 61/02 F02B 61/06

Claims (1)

(57) [Claims] An engine crankcase is disposed between front and rear wheels, a transmission is provided on one side of the crankcase, and the transmission is connected to a drive pulley connected to a crankshaft side. A driven pulley located behind the drive pulley and behind the crankcase, and a V-belt wound around the two pulleys, and a clutch and a reduction gear mounted on the driven pulley via the rear wheel. in component arrangement structure of the power transmission device in a straddle-type vehicle linked to, the crankcase and the space of the corner portion sandwiched between the driven pulley, juxtaposition of the said clutch and reduction gear in the vehicle width direction
The crankcase and the clutch
And the clutch and the reduction gear together in the clutch case.
In the vehicle body width direction and approach each other to make the clutch wet, and the reduction gear
Component arrangement structure of the power transmission device in a straddle type vehicle and expression.