JP2002211468A - Frame structure of scooter type motorcycle - Google Patents

Abstract

(57) [Problem] To provide a scooter type motorcycle in which a tank and electric components are arranged behind a seat to increase the degree of freedom in external design and reduce costs. A motorcycle (10) has a front frame extending rearward and downward from a head pipe, a rear frame (90) extending rearward and upward from a rear end of the front frame, and a seat (19) on an upper portion of the rear frame (90). The reserve tank 44 is disposed behind the seat 19 and behind the rear frame 90.
And a scooter on which a battery 45 is arranged. The rear frame 90 includes the reserve tank 44 and the battery 45.
This is a cast product in which a planar supporting portion 95 for supporting the sheet is integrally formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a scooter type motorcycle in which a tank and electric components are arranged behind a seat.

[0002]

2. Description of the Related Art Some motorcycles, including scooters, have a tank and electrical components arranged behind a seat. As such a motorcycle, for example, Japanese Unexamined Patent Publication No.
Japanese Patent Application Laid-Open No. 2-210187 discloses a "breather device for a vehicle-mounted battery" (hereinafter referred to as "prior art").

In the above prior art, as shown in FIG. 1 and FIG. 2 of the publication, the main frame is moved rearward and downward from the head pipe 2 (the number is cited in the publication. The same applies hereinafter). 5, a seat rail 11 is extended rearward and upward from a rear end of the main frame 5, a seat 13 is mounted on an upper portion of the seat rail 11, and a battery is provided behind the seat 13 and a rear portion of the seat rail 11. 14 is mounted.

[0004]

The battery 1
Electrical components such as 4 are relatively large and heavy. In addition, tanks such as a reserve tank and a fuel tank store a fixed amount of liquid, and are therefore relatively large and heavy. In addition to supporting such electrical components and tanks, the seat 13
Is a wide and rigid frame member.

Generally, the body frame including the seat rail 11 is a pipe frame formed by welding steel pipes. For example, a pair of left and right steel pipes may extend rearward from the main frame 5 to form a wide seat rail 11. In this case, a steel plate supporting portion is bridged and welded between the rear portions of the left and right steel pipes, and an electrical component or a tank is attached to the supporting portion.

However, as shown in FIG. 2 of the above prior art, electric components and tanks are disposed between the left and right steel pipes, so that extra space is required in the vehicle width direction. The extra space restricts the design of the appearance of the motorcycle. In addition, since the structure is a combination of steel pipes and steel plates, welding is performed one by one, and a welding jig is required, which increases the number of welding steps. Therefore, it becomes a factor of increasing the cost of the motorcycle. The same applies to scooter type motorcycles.

An object of the present invention is to provide a scooter-type motorcycle having a tank and electrical components arranged behind a seat, which provides a technique capable of increasing the degree of freedom in external design and reducing costs. .

[0008]

In order to achieve the above object, a first aspect of the present invention is to extend a front frame from a head pipe to a rear lower portion, and to extend a rear frame from a rear end of the front frame to a rear upper portion. In a scooter-type motorcycle in which a seat is arranged on an upper portion of the rear frame, and a tank and electric components are arranged behind the seat and behind the rear frame, the rear frame has a flat support for supporting the tank and the electric components. It is characterized by being a cast product in which the part is formed integrally.

Since the support portion for supporting the tank and the electric components is flat, there is no need for extra space around the tank and the electric components as in the conventional pipe support structure. Since there is no extra space, the structure for supporting the tank and the electrical components can be reduced in size. Since the support structure is small, the degree of freedom in designing the external appearance of the scooter-type motorcycle is increased. Further, since the rear frame is a cast product in which the support portion is integrally formed, the cost is lower. By using such an inexpensive rear frame, the cost of the scooter-type motorcycle can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that "before", "after",
“Left”, “right”, “up”, and “down” follow the direction viewed from the driver, and Fr indicates the front side, Rr indicates the rear side, L indicates the left side, and R indicates the right side. Also, the drawings should be viewed in the direction of reference numerals.

FIG. 1 is a left side view of a motorcycle according to the present invention. The motorcycle 10 includes a body frame 11, a front fork 12 attached to a head pipe 11a of the body frame 11, a front wheel 13 attached to the front fork 12, and a handle 14 connected to the front fork 12.
A power unit 15 attached to the rear of the body frame 11 so as to be able to swing up and down; a rear wheel 16 attached to the power unit 15; a rear cushion unit 17 that suspends the rear end of the power unit 15; The attached storage box 18 and the seat 19 arranged on the storage box 18 and attached to be openable and closable,
It is a scooter-type motorcycle with a main configuration.

The power unit 15 includes a front water-cooled engine 21 and a rear power transmission mechanism 22. The engine 21 has a cylinder head arranged substantially horizontally with the front facing forward.

The motorcycle 10 further includes a body frame 1
1 is covered with a body cover 30. The body cover 30 includes a front cover 31 that covers the front portion of the head pipe 11a, and a leg shield 3 that covers the front of the driver's leg.
2, a step floor (low-floor type footrest plate) 33 on which the driver's foot is placed, left and right floor side covers 34 extending downward from the outer edge of the step floor 33, and a space between the lower edges of the floor side covers 34. An under cover 35 for covering; a lower seat cover 36 for covering the front half of the storage box 18; a rear cover 37 for covering the rear half of the storage box 18 and the rear of the vehicle body;
6 and left and right side covers 38 extending downward from the rear cover 37.

In such a motorcycle 10, an ignition key cylinder 41 is disposed at a leg shield 32, a fuel tank 42 and a fuel pump 43 are disposed under a step floor 33, and a rear frame 90 of the body frame 11 is provided. The seat 19 is arranged on the upper part of the vehicle, and the reserve tank 44 and the electric components (the battery 45 and the control unit 46) are arranged behind the seat 19 and behind the rear frame 90. The reserve tank 44 is a tank for storing a coolant for the radiator 65 for cooling the engine.

In the figure, 51 is a handle grip, 52 is a brake lever, 53 is a meter, 54 is a mirror, 55 is a turn signal, 56F is a front handle cover, 56R is a rear cover, 57 is a headlamp, 58 is a horn, 59 Is a front fender, 61 is a hanger for mounting a power unit, 62 is a kick pedal for starting an engine, 63 is an air cleaner, 64 is a carburetor, 65 is a radiator for cooling an engine, 66 is an exhaust pipe for an engine, 67 is an exhaust muffler, and 71 is a main muffler. Stand, 72 is rear fender, 73
Is a tail lamp, 74 is a turn signal, 75 is a carrier, H
e is a helmet.

FIG. 2 is a left side view of the vehicle body frame according to the present invention. The body frame 11 is a frame member in which the front frame 80 extends rearward and downward from the head pipe 11a, and the rear frame 90 extends rearward and upward from the rear end of the front frame 80. More specifically, the vehicle body frame 11 is located below the step floor 33 (see FIG. 1),
This is a divided frame divided into two before and after a 0 and a rear frame 90.

The front frame 80 includes a head pipe 11a.
A head pipe post 81 extending downward from the head pipe 11a, and a pair of left and right main frames 82, 82 extending bifurcated rearward from the lower end of the head pipe post 81.
(Only the left is shown in this figure.), For example, a cast product of an aluminum alloy. By superimposing a division surface 91 provided at the front end of the rear frame 90 on a division surface 83 provided at the rear end of the front frame 80, it is possible to divide and connect with the bolts and nuts 92.

FIG. 3 is an exploded view around the rear frame and the rear fender according to the present invention. The rear frame 90 includes a pair of left and right main frames 93, 93, a front cross member 94 bridged between front and rear intermediate portions of the left and right main frames 93, 93, and left and right main frames 93, 9.
3 and four sub-frame mounting brackets 96 projecting upward from the rear portions of the left and right main frames 93, 93.
.. indicates a plurality. same as below. ), A rear cushion unit connecting bracket 97 standing upright from the front left position of the support portion 95, a fender mounting portion 98 standing upright from the center of the vehicle width at the rear end of the support portion 95, and left and right sides of the fender mounting portion 98. , The upright portions 99, 99 rising from the rear end of the support portion 95, and the right and left upright portions 99, 99.
Positioning projections 99a projecting forward and upward from the upper surface of
99a and an integral casting, for example, an aluminum alloy casting.

The rear fender 72 has a flat bottom plate 101.
A front hanging portion 102 hanging down from a front end of the bottom plate 101 and projecting rearward from a lower end thereof; a rear wall portion 103 provided at a rear portion of the bottom plate 101; and right and left side portions of the bottom plate 101 and a rear wall portion 103. Resin molded product (for example, a polypropylene resin product) integrally formed with a fender portion 104 that extends in such a manner as to extend while curving downward at the rear portion, and a rear bulging portion 105 bulging from the vehicle width center portion of the rear wall portion 103. It is.

The rear bulging portion 105 is a hollow bulging portion having an open lower portion, and has a stepped shape of three steps on the left and right sides where the center of the vehicle width is the highest when viewed from the front.
6 and the left and right middle tiers are the control unit mounting portions 107 and 10
7 and the lower left and right tiers are fender positioning portions 108 and 10.
8 is set. The rear mounting portion 106 has a bolt hole 10
6a, the fender positioning portions 108,
Numeral 108 denotes positioning holes 108a and 108a.

After the front hooking portion 102 is hooked on the edge 95a at the front end of the support portion 95, the inner surface of the rear mounting portion 106 is overlaid on the fender mounting portion 98, and the left and right positioning projections 9 are provided.
Positioning holes 108a and 108a are fitted to 9a and 99a for positioning, and finally rear mounting portion 106 is connected to fender mounting portion 98 by bolts 109, thereby removing rear fender 72 from the rear portion of rear frame 90. Can be mounted as possible. As described above, after the front portion of the rear fender 72 is hooked on the rear frame 90 and aligned,
Since the rear part of the rear fender 72 is simply attached to the rear frame 90 with one bolt 109, the workability of attaching the rear fender 72 to the rear frame 90 is good, and the number of mounting steps is reduced.

By the way, the rear frame 90 is provided on the subframe 12 which is arranged so as to straddle the front of the rear fender 72.
0, and a seat lock mechanism (not shown) is attached to the sub-frame 120. The seat lock mechanism is a mechanism for locking the seat 19 (see FIG. 1) in a closed state.

The sub-frame 120 is a press-formed product made of a steel plate having a gate shape as viewed from the front, comprising left and right standing portions 121, 121 and a cross member 122 spanned between upper ends of the standing portions 121, 121. . By connecting the lower ends of the upright portions 99, 99 to the left and right subframe mounting brackets 96 with bolts 123, the subframe 120 can be removably attached to the rear portion of the rear frame 90.

FIG. 4 is a side sectional view of the rear frame and the rear fender around the present invention. The supporting portion 95 of the rear frame 90 has a planar shape, and a hanging edge 95a is formed at the front end of the supporting portion 95. Rear fender 7 on edge 95a
2 shows that the front hook 102 is hooked, the bottom plate 101 of the rear fender 72 is overlapped on the support 95, the inner surface of the rear attachment 106 is overlapped on the fender attachment 98, and they are connected by bolts 109. The bolt 109 is connected to the rear cover 37.
And the fender mounting portion 98 and the rear mounting portion 106 are fastened together.

As described above, since the front hanging portion 102 is hooked on the edge 95a of the supporting portion 95, the rear fender 72 is turned clockwise in the figure (the direction in which the rear fender 72 is turned rearward and downward).
The rear fender 72 does not come off from the rear frame 90 even when the moment described above occurs. Also, rear fender 7
Since the rear part of the rear fender 2 is connected to the rear part of the support part 95 by the bolt 109, even if a moment is generated in the rear fender 72 in the counterclockwise direction (the direction of turning the rear fender 72 rearward and upward), the rear fender 72 is detached from the rear frame 90. Never.

FIG. 5 is an exploded view showing the relationship between the tank and the electric components with respect to the rear fender and the subframe according to the present invention. The rear fender 72 raises a partition plate 111 having a substantially T-shape in plan view from the bottom plate 101, thereby forming the bottom plate 10.
1 is divided into left and right two parts, a tank storage part 112 and a battery storage part 113. The right tank storage unit 112 and the left battery storage unit 113 are spaces that open forward and upward.

In the tank storage section 112, the bottom plate 101
Is formed with a tank positioning hole 114, and a partition plate 111 is formed with a cutout 115 at the upper end. On the other hand, the reserve tank 44 has the positioning protrusion 13 at the bottom.
1 and an attachment stay 132 is formed at the rear end. By arranging the reserve tank 44 in the tank storage portion 112, fitting the positioning protrusion 131 into the tank positioning hole 114, aligning the position, and connecting the mounting stay 132 to the notch 115 with the bolt 133, the rear fender is provided. The reserve tank 44 can be detachably attached to 72.

The bottom plate 10 of the rear fender 72
The front end of the first and the upper end of the partition plate 111 are integrally formed with banding hooks 116 and 117 facing the battery housing 113. After the battery 45 is placed in the battery storage 113, the band hooks 116, 1
The battery 45 can be detachably attached to the rear fender 72 by hanging both ends of the band 118 on the band 17.

The sub-frame 120 includes the cross member 12
A horizontal bracket 124 is integrally formed at the center of the width of the second bracket 2. The stays 46a of the control unit 46 are attached to the left and right control unit mounting portions 107, 107 of the rear fender 72 and the bracket 124 of the sub-frame 120.
Are connected to the rear fender 72 and the sub-frame 120 so that the control unit 46 can be detachably attached.

As is clear from the above description, the rear fender 72 includes a fender portion 104 that covers the upper portion of the rear wheel 16 (see FIG. 1), a portion where the reserve tank 44 and electric components (the battery 45 and the control unit 46) are mounted. Are integrally formed. Therefore, the reserve tank 44
Further, a separate member for collecting the electric components and attaching them to the rear frame 90 is unnecessary.

FIG. 6 is a side sectional view of the storage box and the rear portion of the seat according to the present invention. The storage box 18 is disposed below the seat 19, and the rear wall 14 of the storage box 18 is disposed.
1 shows that the reserve tank 44, the battery 45, and the control unit 46 are arranged adjacent to each other. Since the reserve tank 44, the battery 45, and the control unit 46 can be arranged in an empty space surrounded by the rear cover 37 behind the storage box 18, the storage space for these members 44 to 46 can be easily secured. it can.

The reserve tank 44 is a translucent resin tank, and has a liquid supply port 134 formed in the upper front, two rows of convex ridges 135 and 136 formed in the front, and a hose 137 in the upper rear. A connection port 138 for connection is formed. The position of the upper ridge 135 is a liquid upper limit position, and the position of the lower ridge 136 is a liquid lower limit position. 139 is a cap for opening and closing the liquid supply port 134.

The storage box 18 has an inspection hole 1 in the rear wall 141.
42 is opened, and an inspection lid 150 is fitted into the inspection hole 142 so as to be openable and closable. The inspection hole 142 is a through hole having a size capable of opening and closing the liquid supply port 134 of the reserve tank 44 from inside the storage box 18. Inspection lid 150
Is a translucent resin lid, which is provided with engaging portions 151 and 151 which are detachably engaged with the storage box 18, and a confirmation window 152 through which the amount of liquid in the reserve tank 44 can be viewed from inside the storage box 18. . Reference numeral 153 denotes a hook for hanging the lower edge of the inspection hole 142.

FIG. 7 is a view taken in the direction of arrow 7 in FIG. 6, and shows the reserve tank 4 for the rear fender 72 and the subframe 120.
4 and the arrangement of the control unit 46 are shown. In the figure, 1
61 is a wire harness, 162 is a regulator coupler connected to the control unit 46, and 163 is a unit coupler for connecting the unit harness 164 branched from the wire harness 161 to the control unit 46.

FIG. 8 is a plan view of the rear part of the motorcycle according to the present invention, and shows the reserve tank 4 with respect to the rear fender 72.
4 shows an arrangement relationship between the battery 4 and the battery 45. It should be noted that FIG. 9 shows a state in which the control unit 46 and the subframe 120 shown in FIG. 9 are removed for easy understanding.
The reserve tank 44 is connected to a radiator 65 (see FIG. 1) via a hose 137.

FIG. 9 is a front sectional view showing the arrangement of the rear fender, the reserve tank, and the battery with respect to the support portion of the rear frame according to the present invention. In this figure, the bottom plate 101 of the rear fender 72 is mounted on the flat support portion 95 of the rear frame 90,
The reserve tank 44 disposed on the bottom plate 101 is placed on the bottom plate 101, and the battery 45 disposed on the battery
Indicates that it was placed on 1. Therefore, the reserve tank 44 and the battery 45 can be supported by the rear fender 72, and the rear fender 72 can be supported by the support 95. As a result, the reserve tank 44 and the battery 45 are
5 can support it.

As is apparent from the above description, the present invention is characterized in that the support portion 95 for supporting the reserve tank 44 and the battery 45 (electrical components) has a planar shape. There is no extra unevenness because it is planar. Therefore, there is no need for extra space around the reserve tank 44 and the battery 45 as in the conventional pipe support structure. Since there is no extra space, the structure for supporting the reserve tank 44 and the battery 45 can be reduced in size. Therefore, the degree of freedom of the appearance design of the motorcycle 10 can be increased.

Further, since the rear frame 90 is a cast product in which the support portion 95 is integrally formed, the cost is lower.
Moreover, since the rear frame 90 is provided with the small supporting portion 95, it can be used in more types of vehicles. Therefore, the mass productivity of the rear frame 90 can be improved, and the cost can be further reduced. By using such an inexpensive rear frame 90, the cost of the motorcycle 10 can be reduced.

Further, the reserve tank 44 and the battery 45 are mounted on the rear fender 72, and the rear fender 72 is mounted on the support 95.
The weight of the reserve tank 44 and the battery 45 can be supported by the support 95. Therefore, the reserve tank 4
4 and the weight of the battery 45 need not be supported by the rear fender 72. Since it is not necessary to increase the rigidity of the rear fender 72, a resin product can be used and the cost is low. In addition, since the reserve tank 44 and the battery 45 can be pre-assembled to the rear fender 72, the workability of assembling the rear frame 90 is good.

FIG. 10 is a configuration diagram of the reserve tank and the battery according to the present invention as viewed from the inside of the storage box (part 1).
Even when the inspection hole 142 is closed by the inspection lid 150, the storage box 18 is opened when the sheet is opened.
This indicates that the amount of liquid in the reserve tank 44 can be visually checked through the confirmation window 152 from inside. Inspection lid 1
Reference numeral 50 includes scales 154 and 155 serving as marks when checking the liquid amount of the reserve tank 44 through the check window 152. The position of the upper scale 154 is a liquid upper limit position, and the position of the lower scale 155 is a liquid lower limit position.

The storage box 18 has a stand lock lever 171 provided therein. The stand locking lever 171 provided on the rear wall 141 is an operation member that can swing between a locked position tilted to the left in the drawing and an unlocked position tilted to the right in the drawing. By tilting the stand lock lever 171 to the left in the figure, the main stand 71 shown in FIG. 1 can be locked in a locked state (a state in which the main stand 71 cannot be pulled up while being lowered downward).

FIGS. 11A and 11B are configuration diagrams (part 2) of the reserve tank and the battery as viewed from the inside of the storage box. (A) shows left and right engagement recesses 143, 143;
By removing the engaging portions 151 and 151 from the
Shows that the inspection lid 150 can be removed from the inspection lid. (B) shows that the cap 139 can be removed from the storage box 18 through the inspection hole 142 to supply the liquid to the reserve tank 44 or replace the battery 45.

FIG. 12 is a configuration diagram of the reserve tank and the battery according to the present invention as viewed from the inside of the storage box (part 3).
It is. This figure shows the inspection hole 14 from inside the storage box 18.
2, the conductor 181 is removed from the minus terminal 45a of the battery 45, the conductor 183 with the fuse box 182 is removed from the plus terminal 45b of the battery 45, the band 118 is removed, and the battery 45 is put in and taken out. It is shown that.

In the embodiment of the present invention,
The tank is not limited to the reserve tank 44, and can be applied to various tanks such as a fuel tank. Further, the electrical component is not limited to the battery 45, and can be applied to various electrical components such as the control unit 46.

[0045]

According to the present invention, the following effects are exhibited by the above configuration. In the first aspect, since the tank disposed behind the seat and the supporting portion for supporting the electrical components are made flat, there is no need to provide an extra space around the tank and the electrical components. Since there is no extra space, the structure for supporting the tank and the electrical components can be reduced in size. Therefore, the degree of freedom in the appearance design of the scooter-type motorcycle can be increased.

Further, since the supporting portion is formed integrally with the rear frame and the integrally formed supporting portion and the rear frame are cast products, the cost of the rear frame having the supporting portion can be reduced. . In addition, since the rear frame is provided with a small supporting portion, it can be used in more types of vehicles. Therefore, the mass productivity of the rear frame can be improved, and the cost can be further reduced. By using such an inexpensive rear frame, the cost of the scooter-type motorcycle can be reduced.

[Brief description of the drawings]

FIG. 1 is a left side view of a motorcycle according to the present invention.

FIG. 2 is a left side view of the vehicle body frame according to the present invention.

FIG. 3 is an exploded view around a rear frame and a rear fender according to the present invention.

FIG. 4 is a side cross-sectional view around the rear frame and the rear fender according to the present invention.

FIG. 5 is an exploded view showing the relationship between the tank and electric components with respect to the rear fender and the subframe according to the present invention.

FIG. 6 is a side sectional view of a rear portion of the storage box and the seat according to the present invention.

7 is a view taken in the direction of arrow 7 in FIG. 6;

FIG. 8 is a plan view of the rear part of the motorcycle according to the present invention.

FIG. 9 is a front sectional view showing an arrangement relationship of a rear fender, a reserve tank, and a battery with respect to a support portion of a rear frame according to the present invention.

FIG. 10 is a configuration view of the reserve tank and the battery according to the present invention as viewed from the inside of the storage box (part 1).

FIG. 11 is a configuration view of the reserve tank and the battery according to the present invention as viewed from the inside of the storage box (part 2).

FIG. 12 is a configuration diagram (part 3) of the reserve tank and the battery according to the present invention as viewed from the inside of the storage box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Body frame, 11a ... Head pipe, 19 ... Seat, 44 ... Tank (reserve tank), 45 ... Electric components (battery), 80 ... Front frame, 90 ... Rear frame, 95 ... Support part .

Claims (1)

[Claims] 1. A front frame extends rearward and downward from a head pipe, a rear frame extends rearward and upward from a rear end of the front frame, and a seat is disposed on an upper portion of the rear frame. In a scooter-type motorcycle in which a tank and electric components are arranged at the rear of a rear frame, the rear frame is a cast product integrally formed with a flat support portion for supporting the tank and the electric components. Scooter type motorcycle frame structure.