JP2002019677A - Rear arm structure of motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear arm structure of a motorcycle, enabling proper disposition of each component without having interference of a main stand and a muffler, by improving the shape and disposition of the rear arm. SOLUTION: In this rear arm structure of a motorcycle, a rear wheel 9 is rockably supported by the body side through a right side divided part 111 serving as 'a rear arm'. In the right side divided part 111, the relief part 111e of a main stand, which is recessed upward at the lower rim part 111d when viewing from the side, is formed, and the upper rim part 111f is formed so as to be gradually lowered as it goes toward the rear end part 111.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear arm structure for a motorcycle in which a rear wheel is swingably supported on a body frame or an engine via a rear arm.

[0002]

2. Description of the Related Art Conventionally, in a scooter type vehicle as a motorcycle, a rear wheel is disposed on a vehicle body side via a rear arm extending in a substantially horizontal direction so as to be swingable up and down. The main stand is disposed rotatably, and at the same time, the muffler is disposed so as to extend diagonally upward toward the rear on the side of the vehicle body.

[0003]

However, in such a conventional motor, the main stand and the muffler do not interfere with the rear arm moving up and down.
A suitable arrangement of each component is desired.

[0004] Therefore, the present invention provides a rear arm structure for a motorcycle in which the parts can be suitably arranged without interference of a main stand and a muffler by improving the shape and arrangement of the rear arm. Is an issue.

[0005]

In order to achieve the above object, an invention according to claim 1 is directed to a rear arm structure for a motorcycle in which a rear wheel is swingably supported on a vehicle body via a rear arm. The rear arm has a relief portion of a main stand which is recessed upward at a lower edge portion in a side view, and is formed so that an upper edge portion is gradually lowered toward a rear end side. It has a rear arm structure for motorcycles.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, in a plan view, the rear arm is such that the front end side is located inside and the rear arm gradually widens toward the rear end side. It is characterized by being formed.

[0007]

Embodiments of the present invention will be described below.

[First Embodiment of the Invention] FIGS. 1 to 50 show an embodiment of the present invention. In the embodiment of the present invention, a whole scooter type vehicle which is a motorcycle including the invention will be described.

First, the structure will be described. The scooter type vehicle of this embodiment has a low-floor footrest 81b between the handle 1 and the seat 2 or the like. An engine 4 is fixedly disposed on a body frame 5 (hereinafter, referred to as “frame 5”), and a rear arm 8 is disposed at a rear end of the engine 4 via a pivot shaft 7 so as to be vertically swingable. A rear wheel 10 is supported at the rear end of the vehicle, and a rear cushion 9 is interposed between the engine 4 and the rear arm 8.

The frame 5, which is a skeleton, has a tubular head pipe 5a at the front end as shown in FIGS. 11 and 12, and an upper frame 5b extending rearward from the head pipe 5a. The lower frame 5h is extended.

The upper frame 5b has a head pipe 5a.
A pair of upper frames 5b extend left and right diagonally downward from the rear, and as shown in FIG.
A rear pipe 5 having a diameter smaller than that of the upper frame 5b via a box-shaped portion 5c formed by joining two sheet metals in the middle at the rear end.
d is extended rearward and obliquely upward. Further, a cross member 5e extending along the vehicle width direction is installed on the pair of rear pipes 5d, and thereafter, a front end of a back stay 5f is fixed to the pipe 5d via a bracket 5g. The part is directly fixed to the rear side of the rear pipe 5d.

A lower frame 5h is also provided in a pair of right and left, and extends obliquely downward from the head pipe 5a.
The lower frame 5h and the upper frame 5b are connected by a reinforcing frame 5j.

The head pipe 5 of the frame 5
The steering shaft 11 of the handle 1 is inserted through a and is rotatably supported. The upper end 11 a of the steering shaft 11 protruding from the head pipe 5 a is connected to the left and right front fork pipes 1 via a crown handle 13.
The lower end 11b of the steering shaft 11 protruding from the head pipe 5a is connected to the left and right front fork pipes 14 via an under bracket 16 (see FIG. 11). ).

The handle 1 is attached to the crown handle 13. The handle 1 is covered with a handle cover 6, and a wiring 18 of a grip warmer 17 and a coupler 19 are disposed in the handle cover 6 (see FIG. 14).

The front fork pipe 14
Is a telescopic type, the upper inner tube 14
a is slidably inserted in the lower outer tube 14b in the axial direction, and the inner tube 14a
Are urged upward by a spring (not shown), and the front wheel 20 is supported at the lower end of the outer tube 14b.

On the other hand, the upper part of the engine 4 is provided with a crankcase 4a, a box-like portion 5c between the upper frame 5b and the rear pipe 5d, and a bracket 5 at a lower end of the back stay 5f.
It is bolted to g. The rear ends of the pair of lower frames 5h are squashed flat, and plate-like brackets 5m are fixed to the rear ends, respectively, and the front lower part of the crankcase 4a of the engine 4 is attached to the brackets 5m. Have been. In this bracket 5m,
A side stand 162 is rotatably disposed.

A fuel tank 27 and a luggage storage box 29 located behind the fuel tank 27 are arranged above the engine 4 while being supported by the frame 5. The seat 2 is provided on the upper side so as to be rotatable around a hinge 32 at the front end.

On the other hand, the head pipe 5a of the frame 5
As shown in FIG. 7 and the like, an air cleaner 34 is fixed to the head pipe 5 a and disposed in front of the engine 4, and the air cleaner 34 and the engine 4 are connected via an intake duct 35.

More specifically, the air cleaner 34 is fixed to the head pipe 5a and the front fork pipe 14
Are positioned and shaped so as not to interfere even when rotated as shown by a two-dot chain line in FIG. Also,
An intake duct 35 extended from the air cleaner 34
Is inserted into a center tunnel portion 92 of a body cover described later, and is connected to the engine 4 via the carburetor 38.

In front of the air cleaner 34, an inner panel 40 and a screen 41 are provided.

As shown in FIG. 15, the inner panel 40 has a V-shaped portion 40a projecting substantially in a V-shape at a lower portion thereof. Nuts 42 are provided at a total of six locations each. In addition,
Three places on one side are omitted. These nuts 42
It is made of rubber, has a female screw portion formed inside, and is fitted in a hole of the inner panel 40.
Is screwed together, so that the screen 41 is attached.

In the inner panel 40, a drain groove 40b whose lower side is bifurcated is formed substantially at the center of the lowermost part of the V-shaped part 40a. And V-shaped part 4
A plurality of mounting holes 40c to be mounted on the vehicle body side are formed below 0a, and a protrusion 40d that contacts the back surface side of the screen 41 is formed above the V-shaped portion 40a.
Are formed in several places. Furthermore, the inner panel 40
At the upper end portion, two engagement pieces 40f which are bent into a substantially U-shape and are engaged with a meter cover 44 described later are formed.

On the other hand, the screen 41 is made of a transparent synthetic resin, and the lower side is formed in a shape substantially conforming to the inner panel 40.
At a position corresponding to the vicinity of the upper edge portion 40g of a, a gradation printing portion 41a surrounded by a two-dot chain line in FIG. 15 is provided, and a portion corresponding to the V-shaped portion 40a below the gradation printing portion 41a, An opaque black printing portion 41b is provided. Further, the lower edge of the screen 41 is provided with the nut 42.
The insertion hole 4 into which the screw 43 is inserted at a position corresponding to
1c is formed at a total of six locations (three locations on one side are not visible) at three locations on the left and right sides of the V-shape.

The screen 41 is attached to the inner panel 40 by screwing a screw 43 to a nut 42, as shown in FIG. 16, and the inner panel 40 is attached to the vehicle body side, as shown in FIG. The screen 41 is also provided integrally. In a state where the screen 41 is attached to the inner panel 40, as shown in FIG. 17, the protrusion 40d of the inner panel 40 abuts on the back surface of the screen 41 via the sponge 50, and a gap is opened between the two. ing. Further, the V-shaped portion 40a of the inner panel 40 is covered by the black printing portion 41b of the screen 41, and the V-shaped portion 4a is formed.
The dust, drain grooves 40b, etc. attached to Oa are not visible from the outside.

When the inner panel 40 is mounted on the vehicle body side, as shown in FIG.
The cowling 45 is attached to a cowling 45 with a screw 46, and the cowling 45 is attached to a stay 49 extended from the frame 5 by a screw 47 and a nut 48. The other mounting hole 40c is also attached to a stay or the like (not shown) extended from the frame 5, so that the inner panel 40 and the screen 41 are securely fixed to the vehicle body. Furthermore, the inner panel 40
As shown in FIG. 19, the upper engagement piece 40f is engaged in the engaged portion 44a of the meter cover 44.

A molding 54, which extends from the lower side of the screen 41 to the upper side of the headlamp 53 and forms the outer surface of the vehicle body, is provided.
The upper edge portion 4 covers a screw 43 for attaching the screen 41 to the inner panel 40.

The mounting of the molding 54 is performed as shown in FIG.
As shown in FIG. 8, an engagement protrusion 54 a is formed at a lower central portion of the molding 54, and the engagement protrusion 54 a is inserted into the insertion hole 45 a of the cowling 45. The upper end portions of the molding 54 are attached to leg shields 56 with screws 55, as shown in FIG.

In such a case, when performing maintenance of various parts such as the air cleaner 34 and the valve of the meter 52, two screws 55 of the molding 54 are removed and the engaging projection 54a is removed. Then, the molding 54 is removed. As a result, the mounting portion (the screw 43 and the like) of the inner panel 40 appears, and by removing the screw 43 and the like, a part in which the inner panel 40 and the screen 41 are integrated is removed, so that a maintenance opening appears and various Maintenance can be easily performed.

The screen 41 and the inner panel 4
The attachment and detachment of the screen 41 can increase the number of attachment points of the screen 41 itself, so that the rigidity is secured, the screen 41 can be extended long downward, and the size can be increased, and the formability is improved. , Can be good in design.

Further, a drain groove 40b is formed in the inner panel 40 on the screen 41 side.
b is formed so that the water flowing from above is guided from both sides of the central portion to both sides and flows toward the opening side of the headlamp 53, so that the water does not flow through the central portion between the two headlamps 53. , Appearance quality can be ensured. In addition, by forming the drain groove 40b, the inner panel 4
0 rigidity can be improved.

Further, the inner panel 40 is formed with a pair of projections 40d which are in contact with the back surface of the screen 41, at the middle part of the inner panel 40 in the vertical direction.
It is possible to prevent small articles from entering below the gap between the inner panel 40 and the screen 41 and to improve rigidity.

As shown in FIGS. 10 and 21, the molding 54 has a mirror opening 54b formed in an upper portion thereof. The support 59a of the rearview mirror 59 is formed in the opening 54b.
And a flexible mirror boot 60 is provided between the periphery of the opening 54b and the column 59a.

As a result, the rearview mirror 59 is reliably supported by the frame 5, and even if the positional relationship between the mirror opening 54b and the rearview mirror support 59a is shifted due to a manufacturing error or an assembly error, the mirror boot 60 is used. The deviation can be absorbed.

FIG. 3 shows the molding 54.
As shown in FIG.
Is formed, and the extension 54c is located at the center of the two-lamp type headlamp 53, so that the extension 54c
To cover the space between the head lamps 53. Then, the molding 54 above the head lamp 53,
Since the lower side is covered with the cowling 45, the color tone between the cowling 45 and the molding 54 can be changed, the design (product quality) can be improved, and by removing only the molding 54,
The visibility of the aiming adjustment portion of the headlamp 53 is improved, and the maintainability and the like can be improved.

On the other hand, the front fork pipe 14 is provided at the front of the vehicle as described above. As shown in FIGS. 6, 22 and 23, the inner tube 14a and the head A main switch 63 is provided between the inner tube 14a and the pipe 5a, and a storage portion 64 is disposed outside the rotation range of the inner tube 14a.

More specifically, the main switch 63 is provided as shown in FIG.
As shown in FIGS. 23 and 24, the head 63a is exposed from the switch opening 56a of the leg shield 56,
The main switch body 63b is attached to a stay (not shown) extending from the frame 5 (head pipe 5a) and is supported in a substantially horizontal state along the vehicle front-rear direction.
The main switch 63 is connected to the inner tube 1
The inner tube 4a is arranged inside the rotation range of the inner tube 4a, so that interference with the inner tube 14a is prevented.

As shown in FIGS. 6, 23 and 25 (a), the storage portion 64 has a box-shaped storage portion main body 6.
4a and a lid 64c that opens and closes a frontage 64b of the housing body 64a. The storage portion main body 64a is formed integrally with the leg shield 56 and is formed substantially horizontally along the vehicle front-rear direction. As shown in FIG. 23, the dimension L1 of the frontage 64b is wider than the depth dimension L2 on the back side. Is formed. In other words, from the relationship with the rotation range of the inner tube 14a, the dimension L1 of the frontage 64b is changed to the dimension L on the back side.
By forming it wider than 2, the storage volume of the storage portion main body 64a can be maximized.

Further, as shown in FIG. 25A, the lid 64c is rotatably provided by a hinge 64d provided at a lower portion, and a lock knob 6 provided at an upper portion.
By rotating 4e, the lid 64c is locked and unlocked.

In such a case, when the rotating inner tube 14a is provided at the front portion of the vehicle, the arrangement of the storage portion 64 and the main switch 63 is prevented while preventing interference with the inner tube 14a. By providing the storage section 64, the storage space in the entire vehicle can be expanded.

Further, the storage portion 64 is
a, the inner tube 1
The frontage 64b of the storage section 64 can be widened and the storage volume can be increased while avoiding interference with the storage section 4a.

In this embodiment, the housing 64 is located outside the rotation range of the inner tube 14a, and the main switch 63 is connected to the head pipe 5a and the inner tube 14a.
a, but may be in the reverse positional relationship. In addition, the storage portion 64 is
4a can be arranged at two positions outside the rotation range.
As shown in FIG. 2 and the like, a cowl stay 67 is provided so as to protrude to the side.

That is, as shown in FIGS. 11 and 12, a stay 68 is fixed to the head pipe 5a, and a left and right extension pipe 70 extended to the vehicle width direction (left and right direction) via a bracket 69 is provided on the stay 68. Fixed. An upper end 67a of the cowl stay 67 having a loop shape is joined to both left and right end portions of the left and right extension pipe 70, and a lower end 6 of the cowl stay 67 is joined.
7b is fixed to the lower frame 5h via the bracket 71. A front horizontal pipe 72 that is curved forward and extends substantially horizontally is joined to an intermediate portion in the vertical direction of the pair of cowl stays 67, and a rear side that curves rearward and extends substantially horizontally. The horizontal pipe 73 is joined.

The cowl stays 67 are disposed outside the rotation range of the inner tube 14a of the front fork pipe 14, and the front and rear horizontal pipes 72,
The reference numeral 73 is arranged so as to surround the outside of the rotation range of the inner tube 14a.

Various components (such as the air cleaner 34 and the head lamp 53) are attached to the cowl stay 67 and the front and rear horizontal pipes 72 and 73, and the cowling 45 is attached to the cowl stay 67. As shown in FIG. 27A, a footrest 56c of the leg shield 56 is attached.

More specifically, as shown in FIG. 27A, a bracket 75 is fixed to the cowl stay 67, and a footrest 56c of the leg shield 56 is attached to the bracket 75 by bolts 76 and nuts 77. A footrest 78 is laid on the portion 56c. Reference numeral 79 in FIG. 27A denotes a side panel that covers the lower side of the footrest portion 56c.

The footrest 56c of the leg shield 56
Is continuous with the foot rest portion 81a of the foot board 81, and the foot rest mat 78 is laid across the continuous two foot rest portions 56c and 81a.

By arranging the cowl stay 67 outside the front fork pipe 14 in this way, the cowl stay 67 can bear the load of the footrest portion 56c at an optimum position, and the cowling 45 can be satisfactorily mounted. Can be supported. Therefore, there is no need to extend a long stay from the frame 5,
The overall size and weight can be reduced.

In the front part of the vehicle body, the front fork pipe 14 is configured to rotate, so that it is difficult to support these various parts. By providing the cowl stay 67 and the pipes 70, 72, 73, etc., various components can be easily supported by the cowl stay 67, etc.

Further, as shown in FIG.
Below 1, a meter cover 44 and a leg shield 56, which are cover members facing the driver, are provided. The meter cover 44 is provided with two air introduction holes 83 on the left and right, and an air introduction hole 84 at the center of the upper part of the leg shield 56 in the vehicle width direction.
Is provided.

More specifically, the leg shield 56 includes:
As shown in FIG. 25 (b), a concave portion 56d is formed in the portion where the air introducing hole 84 is formed, and an air introducing hole 84 composed of a plurality of louvers is formed on the bottom surface of the concave portion 56d. A mounting screw 85 is arranged on the bottom surface of the concave portion 56d, and the mounting screw 85 is screwed to a nut 87 of a stay 86 extended from the frame 5 side, so that the bottom surface portion of the concave portion 56d is formed. Stay 8
6 attached.

In such a vehicle, when the vehicle is running, as shown in FIG. 13, the traveling wind entering the inner panel 40 and the molding 54 from the front of the vehicle body as shown by the arrows causes the air to be introduced into them. The holes are introduced from the holes 83 and 84 to the back side of the screen 41 as shown by arrows. Thereby, a rectifying effect can be exhibited, and even if the screen 41 is enlarged, an increase in negative pressure inside the screen 41 can be prevented, and wind noise and wind entrapment can be prevented.

The recess 56d is formed in the leg shield 56, and the air introduction hole 84 and the mounting screw 85 are arranged in the recess 56d. The number of recesses and holes on the surface can be reduced, and the appearance quality can be improved.

On the other hand, as shown in FIG. 26, the foot board 81 has a footrest 81a extending substantially in the horizontal direction and a vertical wall 81b extending upward from the inner end of the footrest 81a. Have. This pair of left and right vertical wall portions 81b,
81b is inclined so as to extend slightly outward as it extends upward. Then, on the upper side of the vertical wall portion 81b,
By disposing the boomerang cover 89, the side cover 90, and the upper cover 91, a center tunnel portion 92 bulging upward by a plurality of vertically divided cover members is formed. This center tunnel 9
26, as shown in FIG. 26, the width H2 on the upper side is wider than the width H1 on the lower side. Note that reference numeral 160 in FIG. 26 denotes an inner fender.

The engine 4 is arranged in the center tunnel 92, and the upper frame 5b of the frame 5 is inserted in the upper part.

The foot rest 81a of the foot board 81
In the lower space, a lower frame 5h, a recovery tank (not shown), a water pipe, and the like are arranged.

By forming the width H2 on the upper side of the center tunnel 92 wide and narrowing the width H1 on the lower side of the center tunnel 92 in this way, even in the case of the engine 4 having a large volume on the upper side, this tunnel 92 has , Can be placed effectively,
By securing the foot mounting space H3 and suppressing the vehicle width to be narrow, it is possible to improve the footing and design. Moreover, gripping can be improved by suppressing the wide portion at the top of the center tunnel portion 92 with the foot.

Further, in the center tunnel portion 92, the above-described carburetor 38, the intake duct 35, and the like are disposed, and at the position where the carburetor 38 is disposed, the upper frame is disposed on the upper side and the lower side. 5b and the lower frame 5h are inserted and disposed. Since the center tunnel portion 92 is formed by dividing a plurality of covers, an optional cover can be easily removed, and the maintainability can be improved. Further, by disposing the upper frame 5b and the lower frame 5h above and below the vaporizer 38, the rigidity around the vaporizer 38 can be improved.

Moreover, the panel 8 is provided separately from the cowling 45.
0, the water absorption cap 155b of the water absorption pipe 155a extended from the radiator 155 is exposed by removing the right panel 80 when viewed from the rear of the vehicle body. Can be.

As shown in FIG. 13, the foot board 81 extends to a position below the seat 2, while a seat lower side cover 95 is provided near the lower side of the seat 2.
Are arranged. A boomerang cover 89, which is an external component that extends in a substantially horizontal direction and is bent in a substantially rectangular shape (so-called boomerang shape), is disposed between the lower seat side cover 95 and the footboard 81. ing.

The boomerang cover 89 is made of a synthetic resin and is mounted on the foot board 81 or the like. That is, as shown in FIG. 27B, a pin 89a is formed in the boomerang cover 89, and the pin 89a is fitted in the fitting hole 81c of the footboard 81. In other portions, a plurality of pin portions 89a are formed and fitted. The end of the footboard 81 and the end of the side cover 90 are attached by screws 96. Further, as shown in FIG. 28, a foot board 81 is fixed to the frame 5 by screws 97, and a boomerang cover 89 is attached to the foot board 81 via a grommet 98. further,
As shown in FIG. 29, an engagement protrusion 89b is formed on the boomerang cover 89, and the engagement protrusion 89b is inserted into and engaged with an engagement hole 95a formed on the seat lower side cover 95. . Similar fitting structures are employed in other plural places. Furthermore, as shown in FIG. 30, a boomerang cover 89 is attached to the lower seat side cover 95 with screws 99.

In this case, a boomerang cover 89 extending substantially in the horizontal direction and bent in a substantially rectangular shape is provided between the footboard 81 and the seat lower side cover 95.
By changing the color and the material of the boomerang cover 89, the boomerang cover 8 is provided.
9 becomes an accent, and the degree of freedom in design can be improved.

The boomerang cover 89 allows the upper edge of the foot board 81 and the seat lower side cover 9 to be mounted.
By covering the lower edge of the seat 5, it is possible to improve the accuracy of the alignment with these components, and at the same time, it is possible to cover the attachment portion of the joint between the foot board 81 and the seat lower side cover 95, thereby improving the appearance quality. be able to.

Furthermore, by removing the boomerang cover 89, maintenance of the equipment disposed inside can be easily performed.

In this embodiment, the "appearance parts"
Although the boomerang cover 89 is used as an example, the present invention is not limited to this, and the boomerang cover 89 may be configured as a part of the frame 5.

As shown in FIG. 1, notches 81d and 81d forming a part of an arc are respectively formed at the rear end of the footboard 81 as the "cover member" and at the rear lower end of the boomerang cover 89. 89c are formed. The side surfaces of the crankcase 4a of the engine 4 are exposed to the outside from the notches 81d and 89c, and the side surfaces of the crankcase 4a and the notches 81d and 89c are formed.
Is substantially flush with the surface.

The engine 4 is fixed to the frame 5 and disposed as described above, and the crankcase 4a of the engine 4 is located below the seat 2 on which the driver sits. The crankshaft 4c disposed in the crankcase 4a is disposed substantially at the center of the vehicle body wheelbase as shown in FIG.

As described above, the notches 81 d and 8 are formed in the foot board 81 and the boomerang cover 89 which cover the engine 4.
9c is formed, and by exposing the side surface of the crankcase 4a to the outside through the notches 81d and 89c, it is possible to improve the driver's feet when the vehicle stops.

That is, when the engine 4 is fixed to the frame 5 side, the engine 4 is disposed below the driver's seating position, and the crankcase 4 a becomes the maximum width of the engine 4 in the engine 4. Therefore, this engine 4
When the entire side of the crankcase 4a is covered with the footboard 81 and the boomerang cover 89, the vehicle width becomes large, and the legibility of the driver deteriorates. Therefore, the notch 81 is provided in a part of the foot board 81 and the boomerang cover 89.
By exposing the crankcase 4a by providing the d and 89c, the width of the crankcase 4a of the engine 4 and the width of the footboard 81 and the boomerang cover 89 can be set to be substantially the same. It is possible to reduce the width of the vehicle body at the portion where the mark is attached, improve the legging performance, and improve the design.

By exposing the crankcase 4a of the engine 4 from the notches 81d and 89c to the outside of the vehicle in this way, it is possible to directly apply running wind and the like to the crankcase 4a, thereby improving the cooling performance. it can.

A storage box 29 and a fuel tank 27 are disposed below the seat 2 while being supported by the frame 5.
The fuel tank 27 is disposed in front of the storage box 29. The upper surface 27 of the fuel tank 27
The upper surface opening 29a of the storage box 29 is disposed at a position lower than the position a.

The sheet 2 is, as shown in FIG.
A storage box 29 is provided rotatably around a hinge 2a provided at the front end, a driver seat 2b on which a driver sits, and a passenger seat on which a passenger sits. 2c. Further, a lock device for maintaining the closed state of the storage box 29 is provided on the rear end side of the seat 2. The rear end of the seat 2 is set before the rear wheel axle 112, and thereby the passenger's seating position is on the front side, which is easily linked to the movement of the vehicle body, and the adhesion to the driver is improved.

As described above, the upper surface 27a of the fuel tank 27 is
Is arranged at a position higher than the upper surface opening 29a of the storage box 29, so that the capacity can be secured.

That is, when the seat 2 has a long overall length and extends forward from the driver's seat 2b, the front side of the seat 2 is not often used as a seat, so the fuel tank 27 is provided at this position. By doing so, the seat height may be slightly higher and the cushion thickness may be smaller, so that the upper surface 27a of the fuel tank 27 can be positioned higher than the upper surface opening 29a of the storage box 29.
The capacity of the fuel tank 27 can be secured.

The upper opening 29 of the storage box 29
Since a is set at a low position, it is possible to easily carry in and out of the luggage, and the storage box 2
9 is located behind the fuel tank 27 at the position of the wide driver seating portion 2b of the seat 2, so that the storage box 29 can also be widened and the storage volume can be secured.

Further, by setting the upper opening 29a of the storage box 29 disposed below the occupant seat 2b at a lower position, the seat surface of the driver seat 2b of the seat 2 can be set at a lower position. Since the cushion thickness of the seat 2 can be ensured, it is possible to improve the legging property and the cushioning property.

As shown in FIGS. 31 and 32, the storage box 29 has the helmet 101 placed on the front side (the longitudinal direction of the helmet 101 extends along the vehicle width direction) and upside down. Helmet storage section 29 to be stored
b is formed. The position of the helmet storage portion 29b is formed corresponding to the widest position of the seat 2, and the bottom of the helmet storage portion 29b is such that it enters a valley between the engine 4 and the rear wheel 10. Formed at the location.

A wheel house 29c is formed on the bottom of the rear side of the storage box 29. The center of the wheel house 29c is upward so that the rear wheel 10 that moves up and down does not interfere. Swelling.

In consideration of the getting on and off characteristics, the seat 2 is formed so as to be narrower toward the front and to be closer toward the rear.
The helmet 1 has a wide width, and a helmet storage portion 29b is formed in the widened portion, so that the helmet 1
01 can be stored horizontally. Therefore, the storage box 29 can shorten the front-rear length of the vehicle while securing a storage space by skillfully utilizing the seat shape.

Further, the storage box 29 is shown in FIG.
As shown in the figure, the upper surface opening 29a has a substantially square shape,
Each of the square opening corners 29d has a large radius of curvature, and the lower corner 29e below the upper surface opening 29a has a smaller radius of curvature than the opening corner 29d, and is lower than the area of the upper surface opening 29a. Is larger in area.

As a result, the width of the driver's seat portion 2b of the seat 2 covering the upper surface opening 29a can be reduced, so that the feet can be improved, and the interior of the storage box 29 is expanded, so that the storage is improved. And the upper surface opening 29
Since a is narrow and the length of the seal at the periphery of the opening is short, the sealing performance can be improved.

Further, in the storage box 29, since the wheel house 29c formed on the bottom portion serves as a clearance for the rear wheel 10, the position of the storage box 29 can be lowered. Can be done. Further, since the U-shaped lock 103, a tool (not shown), and the like can be stored in the recessed concave portions 29f on both sides of the wheel house portion 29c, the storage performance can be improved.

Further, a mounting portion 29g to which the alarm immobilizer 104 is mounted is formed on the side surface of the storage box 29. The mounting portion 29g has a shape substantially adapted to the immobilizer 104, and is formed by being recessed inward. Therefore, the user does not need to consider where the alarm immobilizer 104 should be attached, and by attaching the alarm immobilizer 104 to the attachment portion 29g, it is possible to improve the user's attachment workability.

Also, the rear side wall 29 of the storage box 29
In h, a DC outlet 105 is provided so that an electronic device such as a mobile phone can be stored in the storage box 29 and charged. The position of the DC outlet 105 is near the lower corner 29 e of the storage box 29, next to the wheel house 29 c, and in the wheel house 2.
9c is set below the upper surface.

The DC outlet 105 is
It is arranged in a charging system that operates during engine operation, and has a circuit configuration that cuts off the flow of current to the DC outlet 105 except during running.

Further, an illumination device 106 for illuminating the inside of the storage box 29 is provided on the opposite side of the DC outlet 105 and the wheel house 29c. The lighting device 106 is also disposed below the upper surface of the wheel house 29c.

In this way, by disposing the DC outlet 105 on the side wall inside the storage box 29,
The electric components are stored in the storage box 29, and the electric components can be charged during traveling in a waterproof and locked state, that is, in a state where there is no influence from outside the vehicle.

Further, by arranging the DC outlet 105 and the lighting device 106 below the upper surface of the wheel house portion 29c, it is possible to prevent the bag 107 and the like stored in the storage box 29 from obstructing. See FIG. 31).

Further, since the DC outlet 105 is provided near the lower corner 29e of the rear side wall 29h in the storage box 29, charging can be performed by effectively using the corner space.

Further, by distributing the DC outlet 105 and the lighting device 106 to the left and right with the wheel house portion 29c interposed therebetween, it is advantageous in terms of space and operability as compared with the case where both are arranged on one side. And the lighting is not interrupted by the electrical components connected to the DC outlet 105, so that the lighting performance can be ensured.

Further, the storage box 29 has a battery storage portion 29i formed at the upper portion of the rear end portion, and a substantially front half of the upper surface of the battery 30 stored in the battery storage portion 29i is formed at the rear end portion of the seat 2. The rear half of the upper surface of the battery 30 is covered with a tail cover 31.

The fuel tank 27 has an upper surface 27a.
A fuel cap 27b is provided on the seat 2, and the fuel cap 27b is attached to the opening / closing lid 2e provided on the seat 2.
It is covered with. When refueling, the open / close lid 2e
Is opened, and the fuel cap 27b is removed to refuel.

The rear end of the vehicle is shown in FIGS.
As shown in FIG. 2, a license bracket 33 to which a license plate or the like is attached is provided. The license bracket 33 is provided with a license lamp 28 for illuminating the license plate. In the license lamp 28, a bulb 28 is attached to a license bracket 33, and a lens 28a that covers the bulb 28 is disposed on the rear side of the bulb 28 on the vehicle. The lens 28a is mounted on the rear side of the lens 28a on the vehicle. A covering license lamp cover 36 is provided. The license lamp cover 36 has a screw 37 as shown in FIG.
Is attached to the license bracket 33, and a holding projection 36 formed on the license lamp cover 36
The lens 28b is pressed and held by a. As a result, the number of steps for attaching the lens 28b is reduced.

On the other hand, the engine 4 is of a water-cooled type, and on both sides thereof, footrests 56c are provided on the left and right sides. A radiator 155 is disposed. As shown in FIGS. 34 to 36, the radiator 155 has a flat rectangular parallelepiped shape, the longitudinal direction of the radiator 155 is arranged along the vehicle width direction, and the radiator 155 is curved so that the central portion is located rearward, and Slightly lean backward to face diagonally upward and lower frame 5h
Is fixed through a mounting stay 156. The mounting stay 156 extends diagonally forward and downward from the lower frame 5h, and a radiator 155 is mounted and supported above the mounting stay 156.

Thus, below the radiator 155,
Since the mounting stay 156 is provided, the radiator 155 is protected by the mounting stay 156.

The upper side (front side) of the radiator 155
Is provided with a baffle plate 157 for guiding the wind to the radiator 155, while a fan 158 for guiding outside air to the radiator 155 is provided below (rear side) the radiator 155. Below shroud 1 is fan 1
59 are provided.

An inner fender 160 is provided in front of the radiator 155.
A louver 160a that guides the wind to the radiator 155 at zero is formed. Since the direction of the louvers 160a is substantially horizontal, even if muddy water is splashed by the front wheels 20, the louvers 160a are blocked by the louvers 160a to prevent the muddy water from entering the radiator 155. be able to.

Then, the air passing through the radiator 155 passes through the shroud 159 and passes through the inner fender 160.
Is discharged out of the vehicle through an air vent opening 160c provided in the bottom surface portion 160b.

The engine 4 is a water-cooled four-stroke engine, and a driving force from a piston is transmitted to a clutch mechanism via a crankshaft 4c and the dry-type V-belt transmission. The force is transmitted to a secondary transmission 109 provided in the rear arm 8 via a gear reduction mechanism.

More specifically, as shown in FIG. 37, the rear arm 8 is divided into a left division 110 and a right division 111 provided with the secondary transmission device 109, and these divisions 110, 111 Mounting boss parts 110a, 1
11a is extended and abutted, and is fixed by three-point (A, B, C) stoppers as shown in FIG. The mounting bosses 110a and 111a are arranged in a space between the rear wheel 10 and the drive shaft 4b of the engine 4.

The rear cushion 9 shown in FIG.
As shown in the figure, the rear end 9a is sandwiched between the left divided portion 110 and the right divided portion 111 so that the bolt 114
The front end 9b of the rear cushion 9 is rotatably mounted on the engine 4 side by a bolt 117.

The front ends 110b and 111b of the two divided parts 110 and 111 are divided into pivot shafts 7 respectively.
And the rear ends 110c, 111c of the two divided parts 110, 111 are connected to the rear wheel shaft 112.

In the secondary transmission device 109, as shown in FIG. 37, a first sprocket 109a is fixed to an output shaft 113, and the first sprocket 109a is connected to a second sprocket 109 via a first silent chain 109b.
c, the first stage of deceleration is performed, and the second sprocket 109c rotates coaxially and integrally with the second sprocket 109c. The third sprocket 109d arranged outside the second sprocket 109c connects the second silent chain 109e. The second stage deceleration is performed by being connected to the fourth sprocket 109f through the second sprocket 109f.

In the secondary transmission device 109, the front side 109g of the two-stage suspension is located inside the rear side 109h of the two-stage suspension in the vehicle width direction.

The left divided portion 110 is formed by combining the right case half 110d and the left case half 110e together, is formed in a liquid-tight structure, and stores oil therein.

As described above, the secondary transmission 109 has a two-stage drive chain type front part 109g having a rear part 10g.
9h, the front side 109g is located inside, so that the foot bar 115a of the main stand 115 located outside can be formed with a clearance (FIGS. 40, 41, and 41). 42). Therefore, since the foot bar 115a of the main stand 115 can be arranged closer to the center in the vehicle width direction than before, it is possible to secure a bank angle at which a proper cornering posture can be obtained.

Further, by arranging the rear side 109h outside, the arrangement of the brake disk 140 and the like of the disk brake 137 located between the rear side 109 and the rear wheel 10 can be easily performed.

On the other hand, the right-side division unit 111 corresponds to FIG.
As shown in FIG. 8, in a side view, the main stand 115 is bent in a substantially S-shape and is recessed upward at the lower edge 11d.
Is formed so that the upper edge 111f gradually decreases toward the rear end 111c.

As shown in FIG. 43, the right-side divided portion 111 is formed so that the front end portion 111b is located on the inner side and gradually widens toward the rear end portion 111c as shown in FIG.

According to this, as shown in FIG. 5, in the side view, the right divided portion 111 is formed with the relief portion 111e of the main stand 115 which is recessed upward at the lower edge portion 111d. Even when the right divided portion 111 swings, the escape amount of the main stand 115 can be secured, and the upper edge portion 111f is connected to the rear end portion 1.
Since it is formed so as to gradually decrease as it goes to the 11c side, it is possible to secure a clearance amount for the muffler 118 extending obliquely upward on the outside of the right divided portion 111, and to prevent interference between components. And can be arranged effectively.

Further, as shown in FIG. 43, the right-side divided portion 111 is formed so that the front end portion 111b is located on the inside and gradually widens toward the rear end portion 111c as shown in FIG. The muffler 118 extending obliquely upward toward the rear has a right-side divided portion 111.
The muffler 118 can be more easily arranged because it passes through the outside on the front end 111b side, which is located inside, and passes on the upper side on the rear end 111c side.

Further, the right divided portion 111 has a shape that is twisted with a smooth curve, and the plurality of ribs 111g are formed along the longitudinal direction, so that the rigidity can be improved. .

Further, the right dividing section 111 includes:
As shown in FIG. 38, a bump stopper 111i, which is an elastic member, is provided above the pivot shaft 7. According to this, against the pulling force of the rear cushion 9,
When the right divided portion 111 is largely rotated upward via the pivot shaft 7, the bump stopper 111i is brought into contact with the rigid engine suspension portion of the frame 5 to stop the upward rotation. I have.

In addition, the left and right divisions 110 and 111
The distance between the front ends 110b and 111b is close, and the mounting boss 11 is located on the front ends 110b and 111b.
Since the mounting bosses 110a and 111a are provided, the lengths of these mounting bosses 110a and 111a can be reduced.

Also, the mounting bosses 110a, 111
The mudguards 110f and 111h integrally formed with the a function as a mudguard of the rear cushion 9. In addition, the mounting bosses 110a and 111a are formed to have a wide width in the vertical direction, and rigidity can be secured by tightening at three points. At the same time, by tightening near the pivot shaft 7, the pivot shaft It is possible to stabilize the pressurization of the bearing portion provided in 7.

On the other hand, as shown in FIG. 37, the rear wheel 10 is rotatably disposed on a fixed rear wheel shaft 112 via a bearing 138, and a wheel cast 141 of the rear wheel 10 is provided.
In addition, a clutch hub 139 is fixed by bolts 139a, the secondary transmission device 109 and the clutch hub 139 are connected by a spline portion, and the driving force from the secondary transmission device 109 is transmitted through the clutch hub 139 to the rear wheel. 10.

The wheel cast 1 of the rear wheel 10
A brake disk 140 is fixed to 41 by bolts 140a.

Further, the caliper 143 of the disc brake 140 is disposed in the left divided portion 110, and the pad of the caliper 143 holds the brake disc 140 to apply a braking force.

The caliper 143 is connected to the left splitter 110
As shown in FIGS. 44 and 45, the bolt 144 is attached to the outer left case half 110e at two places, and by removing one of the bolts 144, the other bolt 144 is centered. The caliper 143 is arranged to rotate, and is disposed outside the rim portion 10a of the rear wheel 10 in the vehicle width direction.

As a result, even if the caliper 143 is rotated, the caliper 143 does not hit the rear wheel 10.
3 can be rotated by a predetermined amount, so that maintenance such as pad replacement of the caliper 143 can be easily performed. Also, even if the diameter of the brake disc 140 is slightly increased, the caliper 143 and the rim portion 10 of the rear wheel 10
a can be suppressed. Furthermore, since the caliper 143 is attached to the outer left case half 110e, it is convenient for removal.

The disc brake 137 and the rear wheel 10
A mounting plate 145 is provided on the opposite side with the fixed rear wheel shaft 112 penetrating therethrough. An ABS sensor 145a is mounted on the mounting plate 145, and the rotation of the mounting plate 145 is prevented. A detent member 145b is provided between the rear arm 8 and the right divided portion 111.

On the other hand, the main stand 115
As shown in 6 and the like, it is rotatably disposed on the engine 4 as a “fixed portion” via a bracket 119.
That is, as shown in FIG.
Are provided on the left and right, and as shown in FIG.
0, the bracket 119 is fixed to the engine 4.
A pair of legs 115b of the main stand 115 is rotatably disposed on a rotation shaft 121, and the legs 115b are connected by a connection bar 115c as shown in FIGS. The foot bar 115a is fixed to the one leg 115b substantially vertically, and a space between the main stand 115 and the bracket 119 is provided.
As shown in FIG. 1, a spring 122 is provided.

Then, the bracket 119 has a structure shown in FIG.
As shown in FIG. 6, a roller-shaped first stopper portion 123 is rotatably disposed. The first stopper portion 123 flips up the main stand 115 and rotates the main stand 115 upward, so that the main stand 115 is rotated. As shown by a two-dot chain line in FIG. 46, when a predetermined rotation position is reached, the first stopper portion 123 abuts on the main stand 115 to stop the rotation.

The first stopper 123 can be disposed on the main stand 115 side. Further, the main stand 115 is provided with a second stopper portion 124. When the left divided portion 110 as the "swinging portion" is rotated downward by a predetermined amount, the second stopper portion 124 is moved to the left divided portion 110. The two stopper portions 124 are configured to abut.

According to this, when the main stand 115 is flipped up at the start of traveling, the main stand 115 comes into contact with the first stopper portion 123 as shown by a two-dot chain line in FIG. 115 is stopped, and the main stand 115 is
0 can be prevented from colliding. Therefore, the pivoted position where the main stand 115 is raised can be made closer to the left-side divided portion 110, and the bank angle can be set large.

During the traveling, the left division 1
The second stopper portion 1 of the main stand 115 is rotated when the base 10 swings with respect to the engine 4 side and swings a predetermined amount downward.
24 is contacted with the left side divided portion 110, and the main stand 1
Collision between the left and right sides 15 and the left division 110 is relieved.

By the way, when the main stand 115 is flipped up, the main stand 115 and the left divided portion 110
When trying to buffer with a stopper provided between the main stand 115 and the main stand 115
Alternatively, since the left divided portion 110 is always in swinging contact with the left divided portion 110, the abutting portion of the stopper portion slides and is worn. On the other hand, when the main stand 115 is flipped up as in the present invention, the first stopper 1 on the bracket 119 side is required.
By buffering at 23, during traveling, the buffer is performed by the second stopper 124 only when the left divided portion 110 is rotated downward by a predetermined amount. Therefore, the impact between the main stand 115 and the left divided portion 110 can be buffered, the wear of the second stopper portion 124 and the like can be prevented, and the bank angle can be increased.

In addition, the structure can be easily set by disposing the second stopper 124 on the main stand 115 and providing the contact surface of the second stopper 124 on the left division 110. That is, the left division unit 110
If the second stopper 124 is to be provided at the same time, it is necessary to process the parts of the mold, which is difficult.
The contact surface with which the stopper 124 abuts must be set on the main stand 115 in the form of a rod, and the position setting is difficult.

On the other hand, the attachment of the second stopper 124 to the main stand 115 can be easily performed by welding or the like, and the setting of the contact surface with the left division 110 can be performed by using the left division. Since 110 has a somewhat broad surface, it can be set relatively easily.

Since the main stand 115 and the bracket 119 are arranged around the rear cushion 9 as shown in FIGS. 41 and 42, the rear cushion 9 is protected by them.

As shown in FIG. 5, the driver and the passenger are seated on the seat 2.
The lower part of the seat 2 is continuously covered from the front end to the rear end by a seat lower side cover 95 or the like as a “cover member”, and a muffler 118 is arranged below the cover 95. The muffler 118 extends obliquely upward toward the rear.
The rear axle 112, which is the "axle", is exposed below the tandem footrest 1 in front of the muffler 118.
27 are arranged.

The muffler 118 is supported by the back stay 5f of the frame 5 as follows. That is, as shown in FIGS. 5 and 47, the frame-side bracket 128 is attached to the back stay 5f, and the muffler-side bracket 129 is attached to an intermediate portion in the longitudinal direction of the muffler 118. A boss member 129a is provided on the muffler side bracket 129,
A bolt 131 is inserted into the boss member 129a, and the bolt 131 is screwed into a slide nut 132 of the frame-side bracket 128, so that the muffler 118 is elastically supported.

The slide nut 132 is held by a frame-side bracket 128 via a nut holding member 133, and is slidably held in the vehicle front / rear direction via an elongated hole 134 with respect to the nut holding member 133.
A rear axle 112 is provided below a mounting portion of the muffler 118.
Are arranged.

In this way, since the intermediate stay can be eliminated, the number of parts and the number of mounting steps can be reduced, and the muffler 118 can be made closer to the back stay 5f, so that the muffler 118 can be set at a higher position. .
Further, by providing the slide nut 132, it is easy to adjust the position in the vehicle front-rear direction when the muffler 118 is attached. Further, since the slide nut 132 is held in advance between the frame-side bracket 128 and the nut holding member 133, the bolt 131 can be easily screwed at the time of attachment.

In addition, the tandem footrest 127
Has a substantially rod-like shape, and is disposed so as to be freely foldable on the box-shaped bracket 5i, and is stored along the boomerang cover 89 by being folded when not in use.

By installing the tandem footrest 127 in front of the muffler 118 in this way, it is possible to give the passenger a degree of freedom in the riding posture.

Further, the rear pipe 5d on the upper side of the back stay 5f to which the muffler 118 is attached has a structure shown in FIG.
As shown in the figure, the mounting stay 135 is bolted, and a plurality of electric components 136 are disposed on the mounting stay 135. These electric components 136 are covered with a seat lower side cover 95.

As shown in FIGS. 48 to 50, the engine 4 is provided with a V-belt chamber 165 in which a dry V-belt transmission is built.
The outside air introduction duct 166 is extended from the outside, and an element 167 is exposed and disposed at the tip of the outside air introduction duct 166.
It faces one vertical wall portion 81b.

More specifically, the V-belt chamber 165 is disposed on the right side (one side) when viewed from the rear of the vehicle, and the outside air introduction duct 166 extends from the V-belt chamber 165 toward the left side (the other side) of the vehicle. It is inserted between the fuel tank 27 and the storage box 29. This outside air introduction duct 166 is connected to an element 67 fixed to the pipe 5d after being arranged on the left side of the vehicle. A urethane foam 168 is provided on the element 67, and a shielding member 169 is fixed to the engine 4 below the element 67.
At 69a, intrusion of muddy water or the like from below into the element 67 is prevented. The urethane foam 168 is compressed by attaching the footboard vertical wall portion 81b to the element 67 with the screw 170 (see FIG. 50).

According to this, the outside air is supplied to the outside air introduction duct 16.
6, and flows into the V-belt chamber 165 to cool the dry V-belt transmission mechanism.

The outside air introduction duct 166 is thus provided.
The element 167 is disposed at the tip of the element 167 so as to be exposed.
As described above, it is possible to waterproof the footboard vertical wall portion 81b without providing a separate room as in the related art, and to use the footboard 8 for maintenance or the like.
1 when removing the element 167 or the outside air introduction duct 1
It is not necessary to remove 66 together, and the workability is good.

The V-belt chamber 165 is disposed on the right side of the vehicle.
6 is extended toward the left side of the vehicle, and the element 167 of the outside air introduction duct 166 is arranged on the right side. Therefore, the length of the outside air introduction duct 166 can be increased, and even if water enters the duct 166, Due to the diffusion, it is possible to suppress water from entering the V-belt chamber 165.

FIG. 51 shows a second embodiment of the present invention.

In the second embodiment, a drum brake 146 serving as a parking brake is provided on the side opposite to the disk brake 137 serving as the main brake, that is, on the right side when viewed from the rear of the rear wheel 10. Are distributed to the left and right.

On the disc brake 137 side, a brake disc 140 is attached to the wheel cast 14 of the rear wheel 10.
1, the clutch hub 139 is pressed from the outside by the brake disc 140, thereby preventing the clutch hub 139 from coming off.

Thus, the work of disposing the clutch hub 139 can be performed well without separately fixing the clutch hub 139 with bolts.

The drum brake 146 has the rear wheel axle 112 penetrated through the brake plate 147 and is fixed to the right divided portion 111 of the rear arm 8 by bolts 148.
49 is rotatably attached to the cam lever 149.
Is rotated so that the cam 150 is rotated. The rotation of the cam 150 causes the pair of brake shoes 151 to open and close around the anchor pin 152, and the brake shoes 151
3 is configured so that a braking force is exerted by being pressed against it. The brake plate 147 has A
A BS sensor 154 is attached.

As described above, by using the hydraulic disc brake 137 as the main brake, the brake can be effectively used. Further, by using the mechanical brake 146 as the parking brake, a stable braking force can be obtained even when the brake is applied for a long time.

Moreover, by allocating the disc brake 137 and the drum brake 146 to the left and right sides of the rear wheel, both brakes can be effectively disposed in a portion where space is small.

In the above embodiment, the present invention is applied to a scooter type vehicle as a motorcycle. However, the present invention is not limited to this and can be applied to a general motorcycle such as a so-called sports type motorcycle. Of course.

[0150]

As described above, according to the first aspect of the present invention, the relief portion of the main stand, which is recessed upward at the lower edge in the side view, is formed in the rear arm. Therefore, the escape amount when the main stand is stored can be secured, and the outer edge of the rear arm is inclined obliquely upward because the upper edge is formed so as to gradually decrease toward the rear end. An escape amount for the muffler extending toward the outside can be ensured, and interference between the components can be prevented to effectively arrange the components.

According to the second aspect of the present invention, in addition to the above effects, the rear arm is formed so that the front end side is located inside and the rear arm is gradually widened toward the rear end side in plan view. As a result, the muffler that extends diagonally upward toward the rear passes outside the front end side located inside the rear arm and passes over the rear end side, so that the muffler can be arranged more easily. be able to.

[Brief description of the drawings]

FIG. 1 is a side view of a scooter type vehicle according to a first embodiment of the present invention.

FIG. 2 is a plan view of a principal part showing the first embodiment, and is a partial cross section.

FIG. 3 is a front view of the scooter type vehicle showing the first embodiment.

FIG. 4 is a rear view of the scooter type vehicle showing the first embodiment.

FIG. 5 is a side view of the rear side of the side on which the muffler and the like are shown, showing the first embodiment.

FIG. 6 is a view of a front part of the first embodiment viewed from a seat side.

FIG. 7 is a right side view of the first embodiment with the exterior removed.

FIG. 8 is a left side view of the first embodiment with the exterior removed.

FIG. 9 is a plan view of the first embodiment with the exterior removed.

FIG. 10 is a side view showing an exterior part, a body frame, and the like of the first embodiment.

FIG. 11 is a side view showing a vehicle body frame and the like of a vehicle front portion of the first embodiment.

FIG. 12 is a plan view of a vehicle front portion of the first embodiment.

FIG. 13 is a side view of the exterior part of the first embodiment.

FIG. 14 is a plan view of a handle portion according to the first embodiment.

FIG. 15 is an exploded perspective view showing the inner panel and the screen according to the first embodiment.

FIG. 16 is a cross-sectional view of the first embodiment taken along the arrow B7-B7 in FIG. 3;

FIG. 17 is a cross-sectional view of the first embodiment taken along the line B1-B1 in FIG. 15;

FIG. 18 is a cross-sectional view of the first embodiment taken along the line B0-B0 in FIG. 3;

FIG. 19 is a cross-sectional view of the first embodiment taken along line C3-C3 in FIG. 6;

FIG. 20 is a cross-sectional view of Embodiment 1 taken along the line B8-B8 in FIG. 3;

FIG. 21 is a cross-sectional view of the first embodiment taken along the line AF-AF in FIG. 10;

FIG. 22 is an explanatory side view showing a vehicle body frame, a main switch, a storage section, and the like of a vehicle front portion according to the first embodiment;

FIG. 23 is an explanatory plan view showing a vehicle body frame, a main switch, a storage section, and the like of a vehicle front portion according to the first embodiment;

FIG. 24 is a cross-sectional view of the first embodiment taken along line C6-C6 of FIG. 6;

FIG. 25 is a cross-sectional view of FIG. 6 of Embodiment 1;
6 is a sectional view taken along the arrow C5-C5 in FIG. 6, and FIG.
It is sectional drawing of -C7 arrow.

FIG. 26 is a cross-sectional view of the exterior of the embodiment, taken along the line A1-A1 in FIG. 13;

27 is a cross-sectional view of the first embodiment, FIG.
FIG. 10 is a sectional view taken along line A2-A2 of FIG.
It is sectional drawing of AQ arrow.

FIG. 28 is a cross-sectional view of the first embodiment taken along the line AY-AY of FIG. 10;

FIG. 29 is a sectional view of Embodiment 1 taken along the line AV-AV of FIG. 10;

FIG. 30 is a cross-sectional view of the first embodiment taken along the line AW-AW of FIG. 10;

FIG. 31 is a side view in which a part of the storage box of the first embodiment is partially broken.

FIG. 32 is a plan view of the storage box of the first embodiment.

FIG. 33 is a cross-sectional view of the same first embodiment taken along the line D1-D1 in FIG. 4;

FIG. 34 is a schematic side view showing a radiator, a fan, and the like of the first embodiment.

FIG. 35 is a schematic front view showing an inner fender, a radiator, and the like of the first embodiment.

FIG. 36 is a schematic plan view showing an inner fender, a radiator, and the like of the first embodiment.

FIG. 37 is a horizontal sectional view showing the rear arm of the first embodiment.

FIG. 38 is a side view showing the muffler, the rear arm, the engine, and the like in a state where the rear wheel is removed from the first embodiment.

FIG. 39 is a cross-sectional view showing a mounted state of the rear cushion according to the first embodiment.

FIG. 40 is a side view showing a left-side divided portion, a main stand, and the like of the first embodiment.

FIG. 41 is a view of the main stand of the first embodiment in a state where the main stand is flipped up, as viewed from the rear.

FIG. 42 is a side view showing a left divided portion, a main stand, a rear cushion, and the like of the first embodiment.

FIG. 43 is a plan view showing a right-side divided portion, a muffler, and the like according to the first embodiment.

FIG. 44 is a side view of the rear wheel disc brake unit of the first embodiment.

FIG. 45 is a cross-sectional view of a main part of a rear wheel axle portion of the first embodiment.

FIG. 46 is a side view showing the main stand and the like of the first embodiment.

FIG. 47 is a diagram showing an attached state of the muffler according to the first embodiment, in which (a) is a sectional view of a main part, and (b) is a front view showing a slide nut and a nut holding member.

FIG. 48 is a schematic plan view showing a structure for suctioning air into the V-belt chamber according to the first embodiment.

FIG. 49 is a side plan schematic plan view showing a structure for suctioning air into the V-belt chamber according to the first embodiment;

FIG. 50 is a view of elements and the like of the intake structure of Embodiment 1 as viewed from the rear.

FIG. 51 is a cross-sectional view corresponding to FIG. 45 showing the second embodiment of the present invention.

[Explanation of symbols]

 9 Rear wheel 111 Right split part (rear arm) 111c Rear end 111d Lower edge 111e Escape 111f Upper edge

Claims (2)

[Claims] 1. A motorcycle rear arm structure in which a rear wheel is swingably supported on a vehicle body side via a rear arm, wherein the rear arm is recessed upward at a lower edge in a side view, and a main stand escape. A rear arm structure for a motorcycle, characterized in that the upper arm portion is formed so as to gradually decrease in height toward the rear end portion. 2. The motorcycle according to claim 1, wherein the rear arm is formed such that a front end side is located inside and a rear end is gradually widened toward a rear end side in plan view. Rear arm structure.