JPH07156852A - Motor scooter type vehicle - Google Patents

Abstract

PURPOSE:To provide a motor scooter type vehicle which is light and has high rigidity and has a car body frame whose productivity is high. CONSTITUTION:In a motor scooter type vehicle 11 having a car body frame 12 composed of a front frame 13 and a rear frame 14, the front frame 13 has a head pipe 15, a down member 16 and a step bracket 41, on the one hand, at least one of the front frame 13 and the rear frame 14 is integrally molded by a resin material reinforced by a long fiber reinforcing member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scooter type vehicle,
In particular, it relates to a scooter type vehicle having a characteristic body frame.

[0002]

2. Description of the Related Art A scooter type vehicle has a vehicle body frame to which various devices such as an engine, a power transmission device, a suspension and a steering device are mounted. Further, the vehicle body frame is required to have sufficient mechanical and physical strength to support the loads of the above-mentioned devices and occupants and cargo, and to withstand the severe vibration and impact caused by the unevenness of the road surface during traveling.

On the other hand, as a characteristic of the scooter type vehicle, a large U-shaped curve is formed between the handlebar and the driver's seat, and a step board on which the rider puts his / her feet is provided. Further, in recent years, it is becoming common sense that a scooter type vehicle is provided with an article storage room under which a helmet or the like can be stored under a driving seat.

As an example of the structure of the vehicle body frame 1a, as shown in FIG. 8 (a), a head pipe 2 made of steel pipe is used.
Down tube 3 made of steel and curved downward from a
There is one in which a rear frame 4a of a monocoque structure formed by press-forming a steel plate is provided at the rear end of a, and the inside thereof is used as an article storage chamber 5a such as a helmet.

Behind the rear frame 4a, there are provided a bracket 6a for mounting a rear shock absorber and a reinforcing member 7a made of steel also serving as a bracket for mounting other accessory equipment. Further, a step bracket 8a made of steel for supporting a step board (not shown) is horizontally installed on a horizontal portion of the down tube 3a.

As another example of the structure of the vehicle body frame 1b, as shown in FIG. 8 (b), for example, as shown in FIG. 8 (b), the left and right sides of the down tube 3b made of steel pipe extend downward from the head pipe 2b made of steel pipe. A pair of steel pipe rear frames 4b
There is also one in which the tip end of the is fixed and extended upward and rearward.

At the rear of the rear frame 4b, there are provided a bracket 6b for mounting a rear shock absorber and a reinforcing member 7b made of steel which also serves as a bracket for mounting other accessory equipment. Also, an article storage chamber 5b molded of resin or the like
Are provided on the rear frame 4b. Further, a step bracket 8b made of steel for supporting a step board (not shown) is horizontally installed on the horizontal portion of the down tube 3b.

[0008]

However, the vehicle body frame constructed by combining steel members such as steel pipes and steel plates inevitably becomes heavy, which is disadvantageous for small vehicles such as scooters.

Further, welding work is required to combine the steel members, but since there are many brackets for attaching accessory devices and many reinforcing members for obtaining the required strength of the vehicle body frame, there are many welding points. . If there are many welding points, productivity may be reduced and dimensional accuracy may be reduced.
Moreover, welding equipment and skilled workers are also required.

Further, since the brackets and the reinforcing member are provided separately, the number of parts increases, resulting in an increase in cost and a decrease in productivity.

Furthermore, when the rear frame is formed by press-forming a steel plate, the degree of freedom of the shape is small due to the restriction of the drawing depth.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a scooter type vehicle having a body frame which is lightweight, highly rigid and highly productive.

[0013]

In order to solve the above-mentioned problems, a scooter type vehicle according to the present invention has a body frame composed of a front frame and a rear frame, as described in claim 1. In the equipped scooter type vehicle,
The front frame includes a head pipe, a down member,
While including a step bracket, at least one of the front frame and the rear frame is integrally molded with a resin material reinforced by a long fiber reinforcing member.

In order to solve the above-mentioned problems, as described in claim 2, the front frame is made of a resin material in which the head pipe, the down member, and the step bracket are reinforced by a long fiber reinforcing member. It is integrally molded by press molding to obtain a strength member.

Further, in order to solve the above-mentioned problems,
As described in claim 3, the rear frame includes an article storage chamber and a mounting bracket for an accessory such as a rear shock absorber and a rear fender, while the article storage chamber and the attachment bracket for the accessory are provided with long fibers. A resin material reinforced with a reinforcing member is integrally molded by press molding,
It is a strength member.

Further, in order to solve the above-mentioned problems, as described in claim 4, the long fiber reinforcing member is glass long fiber or carbon long fiber, and the resin material is a thermoplastic resin. is there.

In order to solve the above-mentioned problems,
As described in claim 5, the front frame and the rear frame are configured by combining the long fiber reinforcing members in a mat shape or a matrix shape and stacking and press-molding them on the resin member.

[0018]

According to the present invention having the above-mentioned structure, in the scooter type vehicle having the vehicle body frame composed of the front frame and the rear frame, the front frame includes the head pipe, the down member, and the step bracket. On the other hand, since at least one of the front frame and the rear frame is integrally molded with a resin material reinforced by a long fiber reinforcing member, a scooter type vehicle having a body frame that is lightweight and highly rigid and has high productivity is provided. Can be provided.

In the front frame, the head pipe, the down member, and the step bracket are integrally formed by press molding with a resin material reinforced by a long fiber reinforcing member to form a strength member, and the rear frame is also provided. Includes an article storage chamber and a mounting bracket for accessory devices such as rear shock absorbers and rear fenders, while the article storage chamber and the accessory device mounting bracket are integrally formed by press molding with a resin material reinforced with a long fiber reinforcing member. Since it is molded into a strong member, it is possible to provide a scooter type vehicle having a body frame that is lightweight and highly rigid and has high productivity.

Further, the long-fiber reinforcing member is glass long fiber or carbon long fiber, the resin material is thermoplastic resin, and the long-fiber reinforcing member is combined in a mat shape or a matrix shape and laminated on the resin member. Since the front frame and the rear frame are formed by press molding, it is possible to provide a scooter type vehicle including a body frame with higher rigidity.

[0021]

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

FIG. 1 is a left side view showing an example of a scooter type vehicle to which the present invention is applied.

In FIG. 1, the scooter type vehicle 11 has a vehicle body frame 12, which is composed of a front frame 13 and a rear frame 14.

A head pipe 15 is provided in front of the front frame 13, and a down member 16 extends downward from the head pipe 15. A front fork 18 that rotatably supports a front wheel 17 is attached to the head pipe 15.
A handlebar 19 and the like are provided, and the handlebar 19 steers the front wheels 17 so as to be rotatable left and right.

A pivot shaft 21 extending in the vehicle width direction is installed on an engine suspension stay 20 provided in the lower rear portion of the front frame 13, and a power unit 23 is swingably provided on the pivot shaft 21 via a link 22. . The power unit 23 includes an engine 24 and a conduction case 25 extending rearward from one side of the engine 24, or integrally. A carburetor 26 and an air cleaner 27 that form an engine intake system, and a muffler 28 that forms an engine exhaust system are connected to the engine 24.

A rear wheel 29, which is a driving wheel, is held at the rear end of the conductive case 25. The conductive case 25 also serves as a swing arm, and is elastically supported by the rear frame 14 by the rear shock absorber 30. A rear fender 31 is attached to the rear frame 14 above the rear wheel 29.

Around the rear frame 14, an upper frame cover 32, which forms a part of the vehicle body cover and is integrally formed on the left and right sides or separately, is provided so as to surround the upper portion of the rear frame 14, and this upper frame is provided. A lower side cover 33 is provided below the cover 32, for example, divided into right and left.

A rear combination lamp 34 is provided at the rear end of the joint between the upper frame cover 32 and the lower side cover 33, and a rear carrier is provided above the rear combination lamp 34 and at the rear end of the upper frame cover 32. 35 are provided.

An operating seat 36 is provided above the upper frame cover 32 so as to be openable and closable in the forward direction, for example, and an article storage chamber 38 for accommodating a helmet 37 and the like is provided below the operating seat 36. Also, driving seat 3
A seat lock device 39 is provided in the rear upper frame cover 32.

A large U-shaped curve is formed between the handlebar and the driving seat 36, and a step board 40 on which the rider rests his foot is provided.

FIG. 2 is a plan view of the front frame 13,
FIG. 3 is a left side view of the front frame 13.

2 and 3, the front frame 1 is shown.
3 includes a head pipe 15, a down member 16, a step bracket portion 41 that supports the step board 40 from below, and a rear frame support portion 42.

A plurality of reinforcing ribs 43 are formed on the down member 16, the step bracket portion 41, and the rear frame support portion 42. Further, a mounting hole 44 of the engine suspension stay 20 is formed at the lower end of the rear frame support portion 42, while a plurality of bolt holes 45 for mounting the rear frame 14 are provided on the upper surface and the rear end side surface of the rear frame support portion 42. Drilled.

FIG. 4 is a plan view of the rear frame 14,
FIG. 5 is a left side view of the rear frame 14.

4 and 5, the rear frame 1
Reference numeral 4 includes an article storage chamber 38 and an accessory mounting bracket 46 extending rearward of the article storage chamber 38. The accessory mounting bracket 46 includes a rear carrier mounting portion 47, a rear fender mounting portion 48, a seat lock device mounting portion 49, and a rear shock absorber mounting portion 5.
It consists of 0 and.

The rear carrier mounting portion 47 is provided at the rear end portion of the accessory mounting bracket 46, and a plurality of screw holes 47a for mounting the rear carrier 35 are formed.

Further, the rear fender mounting portion 48 extends below the rear carrier mounting portion 47, and a plurality of screw holes 48a for mounting the rear fender 31 are bored. In addition, screw holes 48b for attaching the rear fender 31 are also formed on both rear side surfaces of the article storage chamber 38.

Further, a seat lock device attachment portion 49 is provided between the article storage chamber 38 and the rear carrier attachment portion 47, and a plurality of screw holes 49a for attaching the seat lock device 39 are provided.

Furthermore, a rear shock absorber mounting portion 50 is provided behind the article storage chamber 38 and below the seat lock device mounting portion 49, and the rear shock absorber 30 is provided.
A bolt hole 50a for attaching the upper end is formed. In addition to these accessory mounting parts 47, 48, 49, 50,
For example, a mounting portion for a fuel tank or an oil tank (not shown) may be provided.

Bolt holes 4 formed in the rear frame support portion 42 of the front frame 13 on the bottom of the article storage chamber 38.
A bolt hole 51 is formed in a portion corresponding to 5. Further, a rear frame mounting bracket 52 is formed on the bottom surface of the article storage chamber 38 behind the bolt holes 51.
Further, a screw hole 53 for mounting an unillustrated hinge for opening and closing the operation seat 36 is formed at the tip of the article storage chamber 38.

The front frame 13 including the head pipe 15, the down member 16, the step bracket portion 41, and the rear frame supporting portion 42, and the rear frame 13 including the article storage chamber 38 and the accessory mounting bracket 46. Are integrally press-molded from a long-fiber reinforcing member, for example, a thermoplastic resin which is a resin material reinforced with long glass fibers or long carbon fibers. In particular,
A long-fiber reinforcing member combined in a matte or matrix form is superposed on a block-shaped resin material softened by heat, and then press-molded. Typical thermoplastic resins include polyethylene, polypropylene, polystyrene,
Examples thereof include vinyl chloride resin and ABS resin.

As shown in FIGS. 6 and 7, the rear frame 14 has a rear frame support portion 42 formed on the front frame 13 by, for example, bolts 54a and nuts 54b.
Is fixed to and is integrally connected. 6 is a plan view of the entire body frame 12, and FIG. 7 is a body frame 1.
FIG. 2 is a left side view of the whole 2 and includes auxiliary devices 30, 31, 35,
The state in which 39 is attached is shown.

Next, the operation of this embodiment will be described.

As described above, since the front frame 13 and the rear frame 14 are formed of the resin material, the weight of the vehicle body frame 12 is reduced as compared with the conventional vehicle body frame which is entirely made of a steel member, so that the scooter and the like can be used. It is advantageous for small vehicles.

Further, the head pipe 15 and the down member 1
6, the step bracket portion 41, and the rear frame support portion 4
2 and a front frame 13 and an article storage chamber 3
8 and the rear frame 14 including the accessory mounting bracket 46 are integrally formed by press molding with a resin material, and are integrally coupled to each other to form the vehicle body frame 12, so that there are no welding points. The number of parts is reduced. As a result, cost can be reduced, productivity can be improved, and dimensional accuracy can be improved. Further, there is no need for welding equipment and skilled workers, and the front frame 13 and the rear frame 14 are integrally pressed with a thermoplastic resin reinforced with glass long fibers or carbon long fibers combined in a mat or matrix form. By molding by molding, rigidity can be increased and it can become a strength member,
The degree of freedom in shape is greater than in press forming of steel sheets.

[0046]

As described above, according to the scooter type vehicle according to the present invention, in the scooter type vehicle including the vehicle body frame including the front frame and the rear frame, the front frame is a head pipe. While having a down member and a step bracket, at least one of the front frame and the rear frame is integrally molded with a resin material reinforced with a long fiber reinforcing member, which is lightweight and highly rigid, and has high productivity. A scooter type vehicle including a body frame can be provided.

In the front frame, the head pipe, the down member, and the step bracket are integrally molded by press molding with a resin material reinforced with a long fiber reinforcing member to form a strength member, and the rear frame is While having an article storage chamber and a mounting bracket for accessories such as a rear shock absorber and a rear fender, the article storage chamber and the attachment bracket for the accessories are integrally formed by press molding with a resin material reinforced by a long fiber reinforcing member. Since it is molded and used as a strength member, it is possible to provide a scooter type vehicle having a body frame that is lightweight and highly rigid and has high productivity.

Further, the long fiber reinforcing member is glass long fiber or carbon long fiber, the resin material is thermoplastic resin, and the long fiber reinforcing member is combined in a mat shape or a matrix shape and is laminated on the resin member. Since the front frame and the rear frame are formed by press molding, it is possible to provide a scooter type vehicle including a body frame with higher rigidity.

[Brief description of drawings]

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

FIG. 2 is a plan view of a front frame.

FIG. 3 is a left side view of the front frame.

FIG. 4 is a plan view of a rear frame.

FIG. 5 is a left side view of the rear frame.

FIG. 6 is a plan view of the entire body frame.

FIG. 7 is a left side view of the entire body frame.

8A and 8B are diagrams showing a structure of a conventional vehicle body frame.

[Explanation of symbols]

 11 scooter type vehicle 12 vehicle body frame 13 front frame 14 rear frame 15 head pipe 16 down member 30 rear shock absorber (accessory device) 31 rear fender (accessory device) 35 rear carrier (accessory device) 38 article storage room 39 seat lock device ( Auxiliary equipment) 40 Step board 41 Step bracket portion 42 Rear frame support portion 46 Attached equipment mounting bracket 47 Rear carrier mounting portion 48 Rear fender mounting portion 49 Seat lock device mounting portion 50 Rear shock absorber mounting portion

Claims (5)

[Claims] 1. A scooter-type vehicle including a vehicle body frame including a front frame and a rear frame,
The front frame includes a head pipe, a down member,
A scooter type vehicle comprising a step bracket and at least one of the front frame and the rear frame integrally molded with a resin material reinforced by a long fiber reinforcing member. 2. The strength member according to claim 1, wherein the front frame is formed by press-molding the head pipe, the down member, and the step bracket integrally with a resin material reinforced by a long fiber reinforcing member to form a strength member. Scooter type vehicle. 3. The rear frame includes an article storage chamber and a mounting bracket for an accessory such as a rear shock absorber or a rear fender, while the article storage chamber and the attachment bracket for the accessory are reinforced with a long fiber reinforcing member. 2. The scooter type vehicle according to claim 1, wherein the strength material is integrally formed by press molding with the above resin material. 4. The scooter-type vehicle according to claim 1, 2 or 3, wherein the long fiber reinforcing member is a glass long fiber or a carbon long fiber, and the resin material is a thermoplastic resin. 5. The front frame and the rear frame are formed by combining the long fiber reinforcing members in a mat shape or a matrix shape and press-molding them on the resin member to form the front frame and the rear frame. Scooter type vehicle.