JPH0640371A - Small vehicle - Google Patents

Abstract

PURPOSE:To simplify the frame structure and facilitate the frame assembly by suspending a down frame backward and downward from a head pipe to constitute a vehicle body frame, providing a rear frame extended backward and upward from the center lower section of the vehicle body frame, and branching the rear frame to the right and left. CONSTITUTION:A vehicle body frame 10 is of the under-borne type provided with a down frame 12 extended backward and downward from a head pipe 11, and a rear frame 13 is extended backward and upward from the center lower section of the vehicle body frame 10. The rear frame 13 is largely extended to the rear end section of a small vehicle and terminated, and a lamp unit 14 is provided at its rear terminal. The rear frame 13 of the vehicle body frame 10 is branched to the right and left to form a pair of rear frame members 13a, 13b. The rear frame members 13a, 13b are extended backward and upward from the center lower section of a vehicle body, and a lamp unit 14 is suspended and fixed at their rear end sections.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small vehicle such as a scooter type motorcycle and a motorcycle, and more particularly to a small vehicle having a simple body structure.

[0002]

2. Description of the Related Art A small scooter type vehicle is provided with a down tube extending rearward and downward from a head pipe to form an underbone type vehicle body frame. A leg shield and a footrest are attached to the down tube.

In addition, in this type of scooter type vehicle, there is a scooter type vehicle in which a helmet storage room as an article storage room is provided under the seat so that a helmet or an article can be stored in the storage room in accordance with the obligation to wear a helmet. . The helmet storage room is configured by straddling a trunk type component between a pair of left and right rear frames extending from the lower center of the body frame to the upper rear side, or having a monocoque structure on the rear side of the body frame.

[0004]

In the conventional scooter type vehicle, when the article storage chamber is formed below the seat, the body cowl having the article storage chamber is covered with the frame cover to form the rear cowling. The number of parts is large, which is a factor of cost increase.

Further, in order to form an article storage chamber in a scooter type vehicle, a trunk type component must be added and a body frame of a monocoque structure must be adopted to define the article storage chamber. For this reason, the structure of the vehicle body frame is complicated, there are many welding points, and the assembly of the frame is troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a small vehicle in which the frame structure of a vehicle body frame is simplified, frame assembly is easy, and cost can be reduced.

Another object of the present invention is to provide a small vehicle in which the rear fender and the seat can function as an article storage chamber, the number of parts can be reduced, and the cost can be reduced.

Another object of the present invention is to provide a compact vehicle which does not require a frame cover and has a simple body structure.

[0009]

In order to solve the above-mentioned problems, a small vehicle according to the present invention has a down frame extending rearward and downward from a head pipe to form a vehicle body frame. On the other hand, a rear frame that extends rearward and upward from the lower center of the body frame is provided.
This rear frame is branched into two left and right parts.

In order to solve the above-mentioned problems, a small vehicle according to the present invention has a rear frame extending from a lower center portion of a vehicle body frame to an upper rear side as described in claim 2, while the rear frame is provided. Is composed of a pair of left and right rear frame members, an openable seat and a rear fender that covers the rear wheels are provided on the rear frame member, and the seat and the rear fender are used to store articles between the pair of rear frame members. It forms a chamber.

[0011]

In this compact vehicle, since the rear frame extending from the lower center of the body frame to the upper rear is branched into two left and right parts, the body structure of the compact vehicle can be simplified and the frame can be easily assembled. become.

Also, the rear frame is composed of a pair of left and right rear frame members, and the rear frame member is provided with an openable seat and a rear fender for covering the rear wheels.
Since the article storage chamber is formed between the rear frame members that form a pair with the seat and the rear fender, it is not necessary to add a trunk type component to form the article storage chamber or to make the vehicle body frame a monocoque structure. Since there are few welding points, the number of parts can be reduced and cost can be reduced.

In this case, it is not necessary to provide a frame cover on the rear frame, and when the rear frame also serves as an external part, the number of parts can be further reduced and the simple vehicle body structure can be simplified. it can.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a small vehicle according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall side view of a small vehicle according to the present invention applied to a scooter type vehicle, and FIG. 2 is a plan view of the scooter type vehicle. Although this scooter type vehicle is applied to a motorcycle as an example, it may be applied to a motorcycle such as two rear wheels.

This scooter type vehicle has a body frame 10 having a simple structure. The body frame 10 is an underbone type having a down frame 12 extending rearward and downward from a head pipe 11, and a rear frame 13 extends rearward and upward from a central lower portion of the body frame 10. This rear frame 13 is a small vehicle. The lamp unit 14 is provided at the rear end of the lamp unit 14 by extending largely to the rear end of the rear end.

Down frame 12 and rear frame 13
Are integrally or integrally connected by a frame coupling 15 which is a joint member. The frame coupling 15 is provided with a mounting bracket 16 which also serves as a battery holder.
7 is stored and step 18 is attached,
Fixed. Instead of indirectly fixing the rear frame 13 to the down frame 12 via the frame coupling 15, the rear frame 13 may be directly fixed or both frames may be integrally formed.

On the other hand, the head pipe 11 rotatably supports the front fork 20. The front fork 20 is steered by steering a steering wheel 21, while a lower end thereof rotatably supports a front wheel 22. Reference numeral 23 is a front fender. Code 2
4 is meters.

A front cover 25 having an L shape or a V shape in a side view is attached to the head pipe 11.
A head lamp 26 is attached to the front end of the front cover 25. A storage case 27 is attached on the front cover 25 as required.

Further, a power unit 30 as a swing type unit engine is rotatably mounted around a fulcrum on the lower center of the body frame 10 via a mounting bracket 28. The power unit 30 is an assembly of an engine 31 and a power transmission mechanism 32,
A rear wheel 33 is rotatably supported at the rear end of the power unit 30. The swinging of the power unit 30 is performed by the buffer unit
While being regulated by 4, the air cleaner 36 and the carburetor 37 that form the engine intake system 35 are installed on the power unit 30. The engine intake system 35 may be attached to the rear frame 13 side. Reference numeral 38 is an exhaust muffler from the engine 31, reference numeral 39 is a kick lever, and reference numeral 40 is a bar-shaped stand.

Further, the rear frame 13 of the vehicle body frame 10 constitutes a pair of rear frame members 13a, 13b which are bifurcated left and right. The rear frame members 13a, 13b extend rearward and upward from the lower center of the vehicle body, and the lamp unit 14 is suspended and fixed to the rear end of the rear frame members to be reinforced in terms of strength.

As shown in FIGS. 3 and 4, the rear frame members 13a and 13b have a vertically-closed rectangular cross section and form an external component of a scooter type vehicle. The rear frame members 13a and 13b are curved and formed in a substantially V shape in a side view, and the seat bracket 43 is fixed to the curved portion. The seat bracket 43 extends obliquely upward and forward, and a seat 45 is provided on the upper end of the seat bracket 43 via a hinge 44 so as to be freely opened and closed. The seat 45 is a rear frame member 13a,
Seated on the rear side of the curved portion of 13b via a cushion material 46 such as cushion rubber.

Further, the rear frame members 13a, 13b
A rear fender 48 is attached to the rear side of the curved portion of the. The rear fender 48 covers the rear wheel 33 from above, while the rear fender 48 is formed with a recessed portion 49 opening upward in the central portion, and the mounting brackets 50 are bent on both sides of the recessed portion 49 in an outer flange shape (bellows shape). The mounting bracket 50 is bent, and the rear frame member 13a, 1
It is fixed to 3b by a fixture 51 such as a bolt and nut.

The rear fender 48 is extended so as to project forward from the recessed portion forming portion, and this extended portion 48a constitutes a support portion for the fuel tank 52. The rear fender 48 is attached to the rear frame member 13 of the rear frame 13.
Rear frame member 13 when mounted between a and 13b
While the seat 45 and the recess 49 of the rear frame 48 form an article storage chamber 54 for storing a helmet or the like between a and 13b, the front extension 48 of the rear fender 48 is formed.
A fuel tank 52 is installed in a space surrounded by a and the seat bracket 43. The fuel tank 52 is surrounded and protected by the rear frame members 13a and 13b.

An oil tank 55 is installed and stored on the seat bracket 43. The oil inlet of the oil tank 55 and the inlet of the fuel tank 52 are arranged in parallel with each other and are closed by caps 56 and 57.

In this small scooter type vehicle, the rear frame 13 of the vehicle body frame 10 is composed of the left and right rear frame members 13a and 13b, and the fuel tank 52 and the oil tank 55 are provided inside the rear frame members 13a and 13b. Since the article storage chambers 54 are accommodated respectively so that the functions and the appearances are established, the fuel tank 52 and the oil tank 5 are mounted on the rear frame 13 which is a strength member.
5. The article storage chamber 54 can be protected.
Further, since the rear frame 13 constitutes an external component, it is not necessary to provide a frame cover as an external component, and the number of components can be reduced. By eliminating the frame cover, the weight of the vehicle body can be concentrated on the center line side, resulting in excellent running safety.

5 and 6 show a second embodiment of a small vehicle according to the present invention.

In explaining the small vehicle of this embodiment,
Members corresponding to those of the small vehicles shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be omitted.

The small vehicle shown in FIGS. 5 and 6 is an underbone type motorcycle, and the motorcycle is characterized by the structure of the body frame 10.

This body frame 10 is a down frame 1
2 to the rear frame 13 are integrally or integrally formed, and have a smooth curved structure in a side view, and a suspension member 60 is laid across a boundary portion between the down frame 12 and the rear frame 13. The suspension member 60 is fixed with a step board 61 which also functions as a footrest on a plate or panel.

Further, in this motorcycle, the power unit 30 is supported by the engine suspension bracket 62 provided at the lower front portion of the rear frame 13.
The vertical movement of the is controlled by the buffer unit 34.

On the other hand, the head pipe 1 of the vehicle body frame 10
A lamp mounting bracket 63 extending forward from 1 is mounted, and a lamp unit 64 having a head pipe is mounted on the mounting bracket 63.

The other structure is not different from that shown in one embodiment of FIGS. Also in this case, the down frame 12 and the rear frame 13 of the vehicle body frame 10 constitute external parts, and it is not necessary to provide a frame cover or the like.

7 and 8 show a third embodiment of a small vehicle according to the present invention.

In the structure shown in this embodiment, a suspension member 66 attached to the lower central portion of the vehicle body frame 10 is integrally formed in a portal structure so that the horizontal engine of the power unit 30 is accommodated in the suspension member 66. While letting
A plate or panel-like step board 61 having the functions of a footrest and a step floor is integrally or integrally provided at the lower end of the suspension member 66.

Step board 61 and suspension member 66
Is integrally formed by press type steel material frame or by welding or the like. In this case, since the horizontal engine 31 of the power unit 30 can be housed in the suspension member 66, the size can be reduced accordingly, and the vehicle length of a small vehicle can be reduced.

9 to 11 show a fourth embodiment of a small vehicle according to the present invention.

In the vehicle shown in this embodiment, the rear frame 13 at the rear of the vehicle body of a small vehicle is composed of a pair of left and right press frame members 13c and 13d, and a seat 45 is provided between the pair of left and right press frame members 13c and 13d. The article storage chamber 54 is defined by the rear fender 48.

Since the other structures are the same as those of the small vehicle shown in FIGS. 7 and 8, the same reference numerals are given and the description thereof will be omitted.

In this case, the down frame 12 of the vehicle body frame 10 is composed of a mouthpiece pipe frame, and the rear frame 13 is a press frame member 13 having an open cross section.
It is composed of c and 13d. Press frame member 13c,
13d is formed with the open side facing inward so as not to impair the aesthetic appearance of the appearance part.

12 to 16 show a fifth embodiment of a small vehicle according to the present invention.

In the small vehicle shown in this embodiment, the rear frame 13 on the rear side of the vehicle body frame 10 has a tank function. The rear frame 13 has a pair of left and right press frame members 13c and 13d overlapped with each other, and the front side of the rear frame 13 has a closed cross-sectional structure as shown in FIG. 14, and the rear side of the branch portion of the rear frame 13 is shown in FIG.
5, the left and right pair of press frame members 1
The inner open portions of 3c and 13d are covered with a shielding plate 67 that also functions as a reinforcement, and the inside has a sealed structure.
The internal space of the is used as a fuel tank.

In the rear frame 13, a tank hose 69 is fixed to the inside of the rear end of either the left or right rear frame member 13c, 13d, and oil is supplied through the tank hose 69. The filler port of the tank hose 69 is closed by the cap 70. A tank protection molding 71 that also serves as a decoration is attached to the rear frame 13, and the tank protection molding 71 protects the rear frame 13 as a fuel tank. The left and right rear frame members 13c and 13d are the bridge members 7
It is reinforced by 2,72.

An outlet tube (not shown) is provided in the lower front portion of the rear frame 13 and is connected to the carburetor which constitutes the engine intake system 35 of the power unit 30.

Also in this vehicle body frame 10, the rear frame 13 includes a pair of left and right rear frame members 13c,
An article storage chamber 54 is defined by the seat 45 and the rear fender 48 between 13d, while the rear frame 13
An oil tank 73 is attached to the branch side of the.

Since the other structure is substantially the same as that of the small vehicles of the second and third embodiments shown in FIGS. 7 to 10, the description thereof will be omitted.

17 and 18 show a sixth embodiment of a small vehicle according to the present invention.

In the small vehicle shown in this embodiment, the down frame 12 and the rear frame 13 are integrally connected by the frame coupling 75 as a joint member, and the down frame 12 and the rear frame 13 are also combined.
Is composed of a drawn or extruded mouthpiece frame. The rear frame 13 is composed of left and right rear frame members 13a and 13b. One rear frame member 13a is used as a fuel tank, the other rear frame member 13b is used as an air cleaner, and a seat 45 is seated on top. is there.

The rear frame 13 of the vehicle body frame 10 may form an external component, but may be covered with a frame cover 76 as shown in FIG.

Further, the frame coupling 75 is molded with a steel material or a reinforced resin material, and the step floor 77 is integrally or integrally formed in the lower portion.

19 and 20 show a seventh embodiment of a small vehicle according to the present invention.

In the small vehicle shown in this embodiment, the frame coupling 75 as a joint member is interposed between the down frame 12 and the rear frame 13 of the vehicle body frame 10, while the down frame 12 and the rear frame 13 are provided. Is formed by a pultruded or extruded mouthpiece frame.

The rear frame 13 is composed of left and right paired rear frame members 13a and 13b having a closed cross-sectional structure. One of the rear frame members 13a and 13b is an air cleaner and the other is an oil tank. Further, a fuel tank 78 is provided inside the branch portion of the rear frame 13, and a plate-shaped seat bracket 79 projects obliquely forward and upward from the pair of left and right rear frame members 13a and 13b of the rear frame 13. A seat 45 is openably and closably attached to the front end of the seat bracket 79, and the rear of the seat bracket 79 is stretched between the left and right rear frame members 13a and 13b.
An article storage chamber 80 is defined between the seat 45 and the seat bracket 79.

In this small vehicle, the power unit 30 is provided with the rear fender 81 integrally or integrally.

21 to 23 show an eighth embodiment of a small vehicle according to the present invention.

The small vehicle shown in this embodiment is constructed such that the body frame 10 is detachable, and the body frame 10 includes a head pipe 11, a down frame 12, a frame coupling 75, a rear frame 13 and a box type. The frame 83 is assembled so as to be disassembled.

The rear frame 13 of the vehicle body frame 10 is a mouthpiece frame having a closed cross-section structure, and the rear frame 13 uses the internal volume as an air cleaner.

The box type frame 83 fixed to the rear end of the rear frame 13 has a monocoque body structure in which plates are assembled in a box type, and the fuel tank 8 is provided inside.
4, the oil tank 85, and the battery 86 are stored, and the seat 48 is seated on the box type frame 83 so as to be openable and closable. Reference numeral 87 is a turn signal.

The small vehicles shown in FIGS. 21 to 23 are characterized by the frame structure of the vehicle body frame 10.

24 and 25 show a ninth embodiment of a small vehicle according to the present invention.

The small vehicle shown in this embodiment is characterized by the frame structure of the vehicle body frame 10. The vehicle body frame 10 is an integrated structure of a down frame 12 and a rear frame 13 using a press type frame.

Down frame 12 to rear frame 1
As shown in FIG. 25, the left and right sides of the press frame members 12a, 12b (13c, 13d) are overlapped up to the branch portion of 3, and the closed cross-section structure is formed. Eggplant press frame member 13
A shield frame shown in FIG. 15 is provided on the inner open side of c and 13d, and the internal space is used as an air cleaner.

A rear fender 48 for covering the rear wheel 33 is provided on the rear frame 13, and a seat 45 is openably and closably provided on a seat bracket 43 extending obliquely upward and forward, and between the seat 45 and the rear fender 48. A fuel tank 84, an oil tank 85, and a battery 86 can be stored in the formed article storage chamber.
A small item storage space is secured on the rear side of the.

Further, in the lower center part of the body frame 10,
The suspension portion 89a of the step board 89 that forms the floor is detachably fixed, and the power unit 30 is provided on the rear side of the step board 89. Power unit 3
The engine intake system 35 of 0 is a press frame that constitutes an air cleaner, and a carburetor 37 that is provided on an outread tube 90 taken out from the press frame.
The carburetor 37 mixes fuel and air to allow the engine 31 of the power unit 30 to flow from the manifold.
Is supplied to.

In this small-sized vehicle, the frame structure of the body frame 10 constituting the external parts is simplified, and the structure is further simplified.

[0066]

As described above, the small-sized vehicle of the present invention is simply constructed by bifurcating the left and right rear frames extending from the lower center of the body frame to the upper rear side. As a result, the frame can be easily assembled.

Further, the rear frame is composed of a pair of left and right rear frame members, an openable and closable seat and a rear fender covering the rear wheels are provided on the rear frame member, and a seat is provided between the pair of rear frame members. Since the article storage room is formed by the rear fender and the rear fender, it is not necessary to add a trunk type part or to make the body frame a monocoque structure in order to form the article storage room, reducing the number of parts and reducing the cost. Can be planned.

Further, in this small vehicle, it is not necessary to provide a leg shield or a frame cover, so that the vehicle body structure can be simplified and simplified.

[Brief description of drawings]

FIG. 1 is an overall side view showing a first embodiment of a small vehicle according to the present invention.

FIG. 2 is a plan view of the small vehicle shown in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an exploded perspective view showing an upper rear portion of a small vehicle according to the present invention.

FIG. 5 is an overall schematic side view showing a second embodiment of a small vehicle according to the present invention.

6 is an exploded perspective view showing an upper rear portion of the small vehicle shown in FIG.

FIG. 7 is an overall schematic side view showing a third embodiment of a small vehicle according to the present invention.

8 is a perspective view showing an upper rear portion of the small vehicle shown in FIG.

FIG. 9 is an overall schematic side view showing a fourth embodiment of a small vehicle according to the present invention.

FIG. 10 is a perspective view showing the upper rear portion of the small vehicle shown in FIG. 9.

FIG. 11 is a sectional view taken along line XI-XI of the small vehicle of FIG.

FIG. 12 is an overall schematic side view showing a fifth embodiment of a small vehicle according to the present invention.

13 is a perspective view showing the upper rear part of the small vehicle shown in FIG.

14 is a cross-sectional view taken along line XIV-XIV of the small vehicle shown in FIG.

FIG. 15 is a sectional view taken along line XV-XV of the small vehicle shown in FIG.

16 is a perspective view showing a rear side of a body frame of the small vehicle shown in FIG.

FIG. 17 is an overall schematic side view showing a sixth embodiment of a small vehicle according to the present invention.

18 is a perspective view showing the rear side of the body frame of the small vehicle shown in FIG.

FIG. 19 is an overall schematic side view showing a seventh embodiment of a small vehicle according to the present invention.

20 is a perspective view showing the rear side of the vehicle body frame of the small vehicle shown in FIG.

FIG. 21 is an overall schematic side view showing an eighth embodiment of a small vehicle according to the present invention.

22 is a sectional view taken along the line XXII-XXII in FIG. 21.

23 is a cross-sectional view taken along line XXIII-XXIII of the small vehicle shown in FIG.

FIG. 24 is an overall schematic side view showing a ninth embodiment of a small vehicle according to the present invention.

25 is a perspective view showing an engine intake system of the small vehicle shown in FIG. 24. FIG.

[Explanation of symbols]

 10 Body Frame 11 Head Pipe 12 Down Frame 13 Rear Frame 13a to 13d Rear Frame Member 14 Lamp Unit 15 Frame Coupling (Joint Member) 16 Mounting Bracket 17,86 Battery 18 Step 20 Front Fork 21 Handle 22 Front Wheel 25 Front Cover 30 Power Unit Reference Signs List 31 engine (horizontal engine) 32 power transmission mechanism 33 rear wheel 35 engine intake system 36 air cleaner 37 carburetor 38 exhaust muffler 45 seat 48 rear fender 49 recess 52,84 fuel tank 54 article storage chamber 55, 73, 85 oil tank 60, 66 Suspension member 61 Step board

Claims (2)

[Claims] 1. A body frame is formed by extending a down frame from a head pipe rearward and downward, and a rear frame extending rearward and upward from a lower center portion of the body frame is provided, and the rear frame is branched into two left and right parts. A small vehicle that is characterized by 2. A rear frame extending from a lower center part of a vehicle body frame to a rear upper side, while the rear frame is composed of a pair of left and right rear frame members, and the rear frame member includes a seat and a rear wheel which can be opened and closed. A small vehicle characterized in that an article storage chamber is formed between the pair of rear frame members by a seat and the rear fender.