JP2000118469A - Body frame structure of scooter type motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify constitution of the body frame of a motorcycle, improve the strength of a horizontal part frame, of which a body frame consists, through simple constitution, and excellently hold the degree of freedom of arrangement of a vehicle constitution part. SOLUTION: A foot rest floor 39 is placed on a horizontal part frame 5, of which a carbody frame 2 consists, for fastening. A head pipe 3, a front frame 4, and the horizontal frame part 5 are integrally molded. The horizontal frame 5 comprises a pair of right and left vertical walls of which respective outside parts consist and which are vertically extended, a bottom member integrally extended internally thereof from the lower end part of each vertical wall, and out flanges extended integrally and externally thereof from the upper end part of each vertical wall. The foot rest floor 39 is placed on each out flange for fastening. A battery 40 is disposed in a space between the right and left vertical walls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body frame structure for a scooter type motorcycle.

[0002]

2. Description of the Related Art There is a scooter-type motorcycle conventionally constructed as follows.

[0003] That is, a vehicle body frame comprises a head pipe constituting the front upper end portion thereof, a front frame extending rearward and downward from the head pipe, and a substantially horizontal rearward portion extending from the extending end of the front frame. And a footrest floor is mounted and fastened on the horizontal portion frame.

[0004] Further, an undercover is provided to cover the horizontal frame from below, and in order to attach the undercover to the horizontal frame, the vehicle body frame includes a bracket separately fixed to the horizontal frame. I have.

[0005]

By the way, according to the above-mentioned prior art, the body frame of the motorcycle has a head pipe, a front frame, and a horizontal frame which are individually formed and are welded to each other. Therefore, the configuration of the body frame is complicated because the number of parts of the body frame is large.

On the other hand, a greater load is applied to the occupant and the like from the footrest floor side on the horizontal frame. Therefore, it is conceivable to ensure that the horizontal portion frame has a higher strength. However, simply doing so increases the size of the horizontal portion frame, narrows the excess space in the vehicle body, and thus reduces the vehicle component parts. There is a possibility that the degree of freedom of arrangement is reduced.

Conventionally, the vehicle body frame is provided with a separate bracket for attaching the undercover to the horizontal frame, so that the number of parts of the vehicle body frame is increased and the structure is further complicated. ing.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to simplify the structure of a vehicle body frame in a motorcycle and to improve the strength of a horizontal frame constituting the vehicle body frame. It is an object of the present invention to improve the vehicle configuration with a simple configuration, and to maintain the degree of freedom in arranging vehicle components even in such a case.

Another object of the present invention is to provide a vehicle body frame having a simple structure when an under cover is attached to the horizontal frame.

[0010]

The features of the present invention for achieving the above object are as follows.

According to the first aspect of the present invention, the vehicle body frame 2 includes a head pipe 3 constituting a front upper end thereof, a front frame 4 extending rearward and downward from the head pipe 3,
A horizontal frame 5 extending substantially horizontally rearward from the extending end of the front frame 4;
In the scooter type motorcycle where the footrest floor 39 is mounted and fastened,

The head pipe 3, the front frame 4, and the horizontal frame 5 are integrally formed with each other,

The horizontal portion frame 5 comprises a pair of left and right vertical walls 5a, 5a constituting the outer portions thereof and extending vertically, and integrally extends inward from lower ends of the respective vertical walls 5a. A bottom member 5b, and outward flanges 5c integrally extending outward from upper ends of the vertical walls 5a, respectively, and the footrest floor 39 is placed on each of the outward flanges 5c, 5c. Conclude,

A battery (vehicle component) 40 is disposed in a space between the left and right vertical walls 5a, 5a.

According to a second aspect of the present invention, in addition to the first aspect, a reinforcing member 5d integrally protruding from the bottom member 5b in at least one of the vertical direction is provided.

[0016]

The operation according to each of the above-mentioned inventions is as follows.

According to the first aspect of the present invention, the vehicle body frame 2 includes a head pipe 3 forming a front upper end thereof, a front frame 4 extending rearward and downward from the head pipe 3,
A horizontal frame 5 extending substantially horizontally rearward from the extending end of the front frame 4;
In the scooter type motorcycle where the footrest floor 39 is mounted and fastened,

The head pipe 3, the front frame 4, and the horizontal frame 5 are integrally formed with each other.

Therefore, the number of parts of the vehicle body frame 2 can be reduced as compared with the prior art in which the vehicle body frame is assembled with the head pipe, the front frame, and the horizontal frame separately from each other.

The horizontal frame 5 has a pair of left and right vertical walls 5a, 5a, which constitute the outer portions thereof and extend vertically.
A bottom member 5b integrally extending inward from a lower end of each of the vertical walls 5a; and an outward flange 5c integrally extending outward from an upper end of each of the vertical walls 5a. The footrest floor 39 is mounted and fastened on each of the outward flanges 5c, 5c.

Therefore, the vertical load on the horizontal frame 5 from the footrest floor 39 or the like is mainly supported by the vertically extending vertical walls 5a, 5a. Is mainly supported by a bottom member 5b and an outward flange 5c which extend integrally and inwardly and outwardly from an upper end portion under each of the vertical walls 5a.

Therefore, the horizontal portion frame 5 can resist the load in each direction against the horizontal portion frame 5, and its strength is improved.

A battery (vehicle component) 40 is disposed in a space between the left and right vertical walls 5a, 5a.

For this reason, in order to improve the strength of the horizontal portion frame 5 against a large load in the vertical direction, the vertical size of each of the vertical walls 5a is increased, so that the outer shape of the horizontal portion frame 5 is entirely reduced. Even if the space becomes larger, the space between the left and right vertical walls 5a, 5a is effectively used for disposing the battery (vehicle component) 40 as described above.

According to a second aspect of the present invention, there is provided a reinforcing member 5d integrally projecting from the bottom member 5b in at least one of the vertical direction.

For this reason, the strength of the horizontal frame 5 is further improved by the reinforcing member 5d.

In the above case, the reinforcing member 5d is connected to the vertical wall 5a.
Since the reinforcing member 5d is formed integrally with the bottom member 5b projecting inward from the inside, the reinforcing member 5d is located at a position inwardly away from the vertical wall 5a.

Thus, the outer dimensions of the horizontal frame 5 in the vehicle width direction are not increased by the reinforcing member 5d.

[0029]

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

In the figure, reference numeral 1 denotes a scooter-type electric motorcycle, and an arrow Fr in the figure indicates the front thereof.

The body frame 2 of the motorcycle 1 has an underbone shape.
A head pipe 3 forming the front upper end thereof; and a front frame 4 extending rearward and downward from the head pipe 3.
And a horizontal frame 5 extending substantially horizontally rearward from the extended end of the front frame 4, and once extending rearward and upward from the extended end of the horizontal frame 5, and then extending rearward. A rear frame 6 extends substantially horizontally, and these are integrally formed of a resin material.

In addition, the front frame 4 is, in particular, shown in FIGS.
As shown by 2, at least one of the side view and the plan view, the width dimension is formed to increase from the head pipe 3 side to the horizontal frame 5 side.

A steering shaft 8 is supported on the head pipe 3 so as to be steerable, and a steering knuckle 9 is attached to a lower end of the steering shaft 8. A link 10 connected to the lower end of the steering knuckle 9 is connected to the lower end of the steering knuckle 9.
The front wheel 12 is supported via the and the shock absorber 11. A handle 13 is attached to the upper end of the steering shaft 8.

A power unit 17 includes an AC traveling drive motor 20 and a power transmission device 21.
The transmission case 22 of the power transmission device 21
The casing 23 of the electric motor 20 is attached to the front left side of the motor.

On the other hand, a bracket 25 made of sheet metal is screwed to the lower surface of the rear frame 6 in the front-rear direction with a bolt 26. And this bracket 25
On the other hand, support pieces 27, 27 projecting from the front portion of the transmission case 22 and the upper surfaces of the casing 23 are pivotally supported by a pivot shaft 28, and around the pivot shaft 28, the transmission case 22 is rotated.
The rear part is vertically swingable. The rear part of the transmission case 22 is provided at the rear part of the rear frame 6 with the shock absorber 2.
9 and a rear wheel 30 is supported on the rear left side of the transmission case 22.

The power of the electric motor 20 is transmitted to the rear wheels 30 by a belt transmission means (not shown) provided in the transmission case 22 so that the electric motorcycle 1 can travel. At this time, the shock that the vehicle body receives from the road surface 31 is absorbed by the shock absorbers 11 and 29. Also,
Reference numeral 32 denotes a rear fender, which is integrally formed on the lower surface of the rear frame 6 to prevent mud and the like jumped up by the rear wheel 30 from being directed to the electric motor 20.

A storage box 33 is provided on the rear frame 6. The storage box 33 is also integrally formed with the rear frame 6 with a resin material, thereby suppressing an increase in the number of parts. The storage box 33 has an opening 34 at its upper part, and a sheet 35 is supported on the storage box 33. The front end of the sheet 35 is pivotally supported by a pivot pin 36 at the upper front end of the storage box 33.
5 has a rear portion which is vertically rotatable.

When the seat 35 is pivoted downward as shown, the rider can sit down.
By rotating upward, the opening 34 is opened, and articles such as a helmet can be put in and out of the storage box 33. Further, when the seat 35 is rotated downward as described above, the opening 34 is closed by the seat 35. In this state, the seat 35 is closed.
Is provided on the storage box 33 side.

The horizontal frame 5 has a pair of left and right vertical walls 5a, 5a constituting the outer portions thereof and extending vertically, and integrally extends inward from the lower ends of the respective vertical walls 5a. Also provided are a bottom member 5b whose extending ends are integrally connected to each other, and an outward flange 5c integrally extending outward from the upper end of each of the vertical walls 5a.

The sheet 35 is placed on the horizontal frame 5.
A footrest floor 39 made of resin for a rider who sits on the floor to put his / her feet thereon is placed. More specifically,
The footrest floor 39 is connected to the horizontal frame 5.
Are mounted so as to straddle the outward flanges 5c, 5c, and are fastened by bolts 56.

In a space between the left and right vertical walls 5a, 5a and along the lower surface of the footrest floor 39, a battery 40, which is a vehicle component and serves as a power source for the electric motor 20, is disposed. I have.

A controller 38 is attached to the rear end of the rear frame 6. The controller 38 controls the current supplied from the battery 40 to the electric motor 20 to control the rotation speed and the like of the electric motor 20. .

The battery 40 is supported on the horizontal frame 5 as follows.

That is, the bottom member 5b of the horizontal frame 5
The reinforcing member 5d is integrally protruded upward from the upper side. A recess 42 having an opening 43 that opens upward is formed between each vertical wall 5a of the horizontal frame 5 and the reinforcing member 5d. The battery 40 is composed of a plurality of single units 40a, and each of the single units 40a is housed in each of the recesses 42 so as to be freely inserted and removed.
Styrofoam insulation and cushioning material 45 are interposed between Oa and the inner surface of each recess 42, respectively. Each opening 43 of each recess 42 is closed by the footrest floor 39.

The width B of the battery 40 is slightly smaller than the width A of the footrest floor 39 in the vehicle width direction, and is substantially the same.

In the above case, the footrest floor 39 has a large area in plan view due to its function. For this reason, even if the battery 40 is large, it is easily disposed along the lower surface of the footrest floor 39.

Further, since the footrest floor 39 has a large area in plan view as described above, in this embodiment, the battery 40 is disposed by effectively utilizing the space on the lower surface side of the footrest floor 39. , Large battery 4
0 is flattened.

The width A of the footrest floor 39 in the vehicle width direction is substantially the same as the width B of the battery 40, so that the battery 40 is prevented from protruding outward in the vehicle width direction. Also, the narrowing of the bank angle is suppressed.

In the above case, the combined bodies 5, 39 of the horizontal frame 5 and the footrest floor 39 are box-shaped in cross section, and thus have a structure having sufficient strength. On the other hand, the front frame 4 and the rear frame 6 are formed with ribs 46 on each side surface thereof, thereby improving the strength. In this way, a light and highly rigid body frame 2 is obtained as a whole. Further, by integrating the storage box 33 with the rear frame 6 as described above, the strength of the body frame 2 is improved.

In FIG. 1, the footrest floor 3
A leg shield 49 is provided to cover the rider's feet placed on the front 9 from the front. Also, this leg shield 49
Covers the head pipe 3, the front frame 4, and the steering shaft 8.

In FIGS. 1 and 4, a boss 5e is integrally protruded downward from each bottom member 5b of the horizontal frame 5. An under cover 50 that covers the horizontal frame 5 from below is provided. The under cover 50 is detachably fastened to the bosses 5e by bolts 58 and supported by the horizontal frame 5. Therefore, there is no need to provide the vehicle body frame 2 with a separate bracket for mounting the under cover 50 to the horizontal frame 5, and the mounting is achieved by the vehicle frame 2 having a simple configuration. Each side edge of the undercover 50 extends upward along the side surface of the horizontal frame 5 and fits into a concave groove 59 formed on a side edge of the footrest floor 39. In FIG. 4, reference numeral 51 denotes a drain hole.

Referring to FIGS. 1 and 2, the rear frame 6 shown in FIG.
A main stand 52 is provided on the lower surface of the front end of the main stand. The main stand 52 is urged by a spring so as to be able to select one of an upward rotation posture shown by a solid line in the figure and a downward rotation posture shown by an imaginary line. When the vehicle is in the upward rotation posture, the electric motorcycle 1 can travel, and when the vehicle is in the downward rotation posture, the electric motorcycle 1 can be held in an independent state.

[0053]

The effects of the present invention are as follows.

According to the first aspect of the present invention, the vehicle body frame includes a head pipe constituting the front upper end, a front frame extending rearward and downward from the head pipe, and an extension end of the front frame. And a horizontal frame extending substantially horizontally rearward from a scooter-type motorcycle which is fastened by mounting a footrest floor on the horizontal frame.

The head pipe, front frame, and horizontal frame are integrally formed with each other.

Therefore, the number of parts of the vehicle body frame can be reduced as compared with the prior art in which the vehicle body frame is assembled with the head pipe, the front frame, and the horizontal frame separately from each other. The configuration of the body frame can be simplified.

The horizontal frame includes a pair of left and right vertical walls which form the outer portions thereof and extend vertically, and a bottom member integrally extending inward from the lower end of each of the vertical walls. And outward flanges integrally extending outward from the upper ends of the vertical walls, respectively, and the footrest floor is placed and fastened to each of the outward flanges.

Therefore, the vertical load on the horizontal frame from the footrest floor or the like is mainly supported by the vertical walls extending vertically, and the horizontal load on the horizontal frame is limited by the vertical load. It is mainly supported by a bottom member and an outward flange which extend inward and outward integrally from the upper end portion under the vertical wall.

Accordingly, the horizontal frame can withstand loads in each direction, and the strength of the horizontal frame can be improved. In this case, since the vertical walls, the bottom member, and the outward flange are integrally formed with each other, the strength of the horizontal frame can be improved with a simple configuration.

Further, vehicle components are arranged in the space between the left and right vertical walls.

For this reason, in order to improve the strength of the horizontal frame with respect to a large load in the vertical direction, the vertical dimension of each of the vertical walls is increased, so that the external shape of the horizontal frame is entirely large. Even so, the space between the left and right vertical walls is effectively used for arranging vehicle components as described above.

Therefore, as described above, by improving the strength of the horizontal portion frame with a simple configuration, even when the horizontal portion frame becomes large, the degree of freedom in arranging the vehicle components can be maintained well. Dripping.

According to a second aspect of the present invention, there is provided a reinforcing member integrally projecting from the bottom member in at least one of the vertical direction.

Therefore, the strength of the horizontal frame is further improved by the reinforcing member.

In the above case, since the reinforcing member is formed integrally with the bottom member projecting inward from the vertical wall,
The reinforcing member is located at a position inwardly away from the vertical wall.

Accordingly, since the outer dimensions of the horizontal portion frame in the vehicle width direction are not increased by the reinforcing member, the horizontal portion frame is prevented from being enlarged by the reinforcing member while preventing the horizontal portion frame from becoming large. The strength of the frame can be further improved.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is an overall plan view.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 1;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Body frame 3 Head pipe 4 Front frame 5 Horizontal part frame 5a Vertical wall 5b Bottom member 5c Outward flange 5d Reinforcement member 5e Boss part 20 Electric motor 39 Footrest floor 40 Battery (vehicle component parts)

Claims (2)

[Claims] 1. A vehicle body frame comprising a head pipe constituting a front upper end portion thereof, a front frame extending rearward and downward from the head pipe, and a substantially horizontal rearward portion extending from an extension end of the front frame. A scooter-type motorcycle which is mounted and fastened with a footrest floor mounted on the horizontal frame, the head pipe, the front frame, and the horizontal frame being integrally formed with each other, The horizontal frame includes a pair of left and right vertical walls forming the outer portions thereof and extending vertically, a bottom member integrally extending inward from a lower end of each of the vertical walls, and the respective vertical walls. And outwardly extending flanges extending integrally outward from the upper end of the footrest floor. The footrest floor is placed and fastened on each of the outwardly facing flanges, and the space between the left and right vertical walls is provided. Body frame structure for scooter-type motorcycles with vehicle components arranged between them. 2. The vehicle body frame structure for a scooter-type motorcycle according to claim 1, further comprising a reinforcing member integrally projecting from the bottom member toward at least one of the vertical direction.