JPH04201790A - Motor scooter type motorcycle - Google Patents

Abstract

PURPOSE:To disperse a load from a handle and a shock from a front wheel to frame each part by multi-point supporting right/left frames for supporting the handle by a main frame and a head pipe while the head pipe for supporting a front fork by the main frame and a connecting pipe. CONSTITUTION:A head pipe 21 for steerably supporting a front fork 8 is supported to right/left frames 9a, 9b through a main frame 22, which constitutes a scooter frame 9 with the right/left frames 9a, 9b, and a connecting pipe 23. A steering bar 28, which connects the front fork 8 to a handle shaft 2a to steer a front wheel 6 in accordance with handle operation, is provided, and this bar connects respectively its upper end to the handle shaft 2a and lower end to the front fork 8. Further, a front side storage box 30, set up in a front side car body cover 29, is arranged in space surrounded by the left side frame 9a, right side frame 9b, head pipe 21 and the steering bar 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a scooter type motorcycle, and particularly to a vehicle body structure for providing a storage space in the front portion of the vehicle body.

[Conventional technology]

2. Description of the Related Art Conventionally, a scooter-type motorcycle having a storage space at the front of the vehicle body is disclosed in Japanese Patent Application Laid-Open No. 64-28087. This motorcycle is equipped with a bearing member that supports a front fork at the front end of a front frame made of a single tube, and a pair of left and right supports that are curved laterally and extended upward from the front end of the front frame. The handle shaft was pivotally supported at the upper end of the member, and the handle shaft and the front fork were connected via a steering bar that was curved so as to go around the rear of the steering axis. That is, this motorcycle was provided with a storage space below the handlebar and surrounded by the left and right support members, the steering bar, the front frame, and the like.

[Problem to be solved by the invention]

However, in a conventional motorcycle configured in this way, the front end portion of the front frame supports all related members such as the front fork and the handle.
The impact from the front wheel is concentrated at the joint between the front end of the front frame and the front fork bearing member, and the force transmitted from the rider to the steering wheel is concentrated at the joint between the front frame and the support member. Concentrate and participate. For this reason, it is necessary to make the front frame, front fork bearing member, handlebar support member, etc. thicker, or to reinforce them with gussets, etc., which increases the weight of the vehicle and reduces the storage space. there were.

[Means to solve the problem]

A scooter-type motorcycle according to the present invention includes a main frame extending downward from a head pipe that pivotally supports a front fork, and left and right frames connected to the main frame and extending upward, wherein A shaft support for pivotally supporting the handle shaft is provided at a distance from the head pipe, and the midway portions of the left and right frames are connected to the head pipe by a connecting pipe, and the handle shaft and the front fork are connected to a curved steering shaft. They are connected by a bar, and the space surrounded by the left and right frames, head pipe, and steering bar is used as a storage space.

[For production]

The hend pipe that supports the front fork is supported at multiple points by the main frame extending downward from the hend pipe and connecting pipes extending from the left and right frames, and the left and right frames that support the handlebar are supported at multiple points by the main frame and the head pipe. Therefore, the load from the handlebars and the impact from the front wheels are distributed to each part of the frame.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

FIG. 1 is a side view of a scooter type motorcycle according to the present invention;
FIG. 2 is an enlarged side view showing the main parts of the scooter type motorcycle according to the present invention, with the head pipe section being cut away in this figure. FIG. 3 is a plan view of the frame, and FIG. 4 is a front view of the frame. In these figures,
Reference numeral 1 denotes a scooter, and the scooter 1 is provided with a low-floor footrest 4 between a handle 2 and a seat 3, and a vehicle body cover 5 that covers the lower part of the seat 3 at the rear.

Reference numeral 6 indicates a front wheel of this scooter l, and reference numeral 7 indicates a rear wheel. The front wheel 6 is supported via a front fork 8 to a head pipe of a frame 9, which will be described later, in a freely steerable manner, and the rear wheel 7 is connected to the frame via a unit swing type engine 10. It is swingably supported at the rear of 9. In addition, 11 is a carburetor of the unit swing type engine 10, 12 is a fuel tank, 13 is a cushion unit interposed between the unit swing type engine 10 and the frame 9, and 14 is a carburetor installed in the vehicle body cover 5. It is a storage box.

The storage box 14 is configured such that its upper opening can be opened and closed by the seat 3, and is supported at the rear of the frame 9. Further, 15 indicates a helmet stored in this storage box 14.

The frame 9 is formed symmetrically by bending a tube material, and is provided between a left frame 9a and a right frame 9b extending in the front and back direction on the left and right sides of the vehicle body, and between these left and right frames 9a and 9b. The main frame 22, which will be described later, is located therein. Further, the front part of the frame 9 located in front of the footrest part 4 extends upward from the footrest part 4 and is bent in a dogleg shape when viewed from the side, and at its upper end, the left side frame 9a and the right side The frame 9b is connected to the frame 9b. That is, the front part of this frame 9 is formed in the shape of a gate when viewed from the front, as shown in FIG. and,
An upper pipe 16 for supporting the handle 2 in a freely steerable manner is fixed to the upper end of the frame 9.

In this embodiment, the upper pipe 16 is disposed on the same axis as a steering axis A passing through the fine details of a head pipe for supporting the front forks 8, which will be described later. It is rotatably supported via a synthetic resin bushing 17 as a bearing.

Reference numeral 21 denotes a head pipe that supports the front fork 8 in a steerable manner. It is supported by frames 9a and 9b, and is disposed on the steering axis wAA at a position spaced apart from the upper pipe 16 by a predetermined distance below the upper pipe 16. The main frame 22 is located at the center in the vehicle width direction, and its rear end is connected to a cross member 24 that connects the left frame 9a and right frame 9b at the footrest 4, and its front end is connected to the rear part of the hend pipe 21. has been done. Further, the connecting pipe 23 extends toward the steering axis A from near the bent portions of the left frame 9a and the right frame 9b in a dogleg shape when viewed from the side, and is coupled to a side portion of the hend pipe 21. That is, the head pipe 21 is supported on the frame 9 at three points. The front fork 8 is of a leading link type in which a cushion unit 25 is built into a pair of left and right fork bodies, and the steering shaft 8a is connected to the head pipe 21 via bearings 26 and 27.
It is pivoted on.

In this embodiment, tapered roller bearings are used as the bearings 26 and 27.

A steering bar 28 connects the front fork 8 and the handle shaft 2a to steer the front wheels 6 in response to handle operation. The steering bar 28 has an upper end connected to the handle shaft 2a and a lower end connected to the front fork 8, and is curved in a direction perpendicular to the steering axis A.

In this embodiment, the direction of curvature is determined by the steering bar 28 when traveling straight.
is positioned in front of the head pipe 21. Note that the direction of curvature of this steering bar 28 is as follows:
It can also be directed backwards, contrary to what has been described above.

29 is the front body cover, 30 is this front body cover 29
This is the front storage box installed inside.

This front side storage box 30 is a left side frame 9a.

It is arranged in a space surrounded by the right side frame 9b, the head pipe 21, and the steering bar 28, and a hend pipe 21. A bottom plate 30a is provided to cover the upper side of the main frame 22 and the connecting pipe 23. Further, a baggage loading/unloading port is opened at the rear of the front storage box 30. This baggage inlet/outlet is configured to be opened and closed by a lid 31 swingably provided on the front vehicle body cover 29.

Note that 32 indicates luggage such as a notebook book stored in the front storage box.

In the scooter I configured in this manner, the steering bar 28 swings within the front body cover 29 and the front fork 8 is rotated when the steering wheel is operated. To store the luggage 32 in the front storage box 30, open the lid 31 of the front body cover 29 as shown by the dashed line in Figure 2, and insert the tip of the luggage 32 deep inside. bottom plate 30
Just lean it against a.

Therefore, as shown in this embodiment, the handle 2 and the head pipe 21 are supported at different parts of the frame 9, and the head pipe 21 is supported at three points on the frame 9 by the main frame 22 and the connecting pipe 23. Then, the load from the handlebar 2 and the impact from the front wheel 6 will be dispersed to each part of the frame 9. For this reason, each pipe for supporting the head pipe (left and right frames 9a, 9b)
, the main frame 22, the connecting pipe 23, etc.) can be formed to have low rigidity.

Note that in this embodiment, there are a notebook and a notebook in the front storage box 30.
Although an example is shown in which plate-shaped luggage such as books is stored, a helmet can also be stored as shown in FIGS. 5 and 6.

5 and 6 are views showing other examples in which the helmet is stored in the front storage box. FIG. 5 is a side view of the helmet storage section, and FIG. 6 is a front view of the same. In these figures, the same or equivalent members as those explained in FIGS. 1 to 4 are given the same reference numerals and detailed explanations will be omitted.

5 and 6, 41 is the front body cover 2
A helmet storage box 42 is installed in the helmet 9. This helmet storage box 41 has an upper front portion bulged out to the front compared to that of the previous embodiment in order to store a helmet 42 therein. The upper front portions of the steering bar 28 and the front body cover 29 are extended forward to avoid interference with the helmet storage box 41. Even with this configuration, effects similar to those of the above embodiment can be obtained.

〔Effect of the invention〕

As explained above, the scooter-type motorcycle according to the present invention includes a main frame extending downward from a head pipe that pivotally supports a front fork, and left and right frames connected to this main frame and extending upward, the left and right frames being connected to the main frame and extending upward. A shaft support for pivotally supporting the handle shaft is provided at the upper end of the head pipe at a distance from the head pipe, and the middle portions of the left and right frames are connected to the head pipe by a connecting pipe, and the handle shaft and the front fork are connected to each other. They are connected by a curved steering bar, and the space surrounded by the left and right frames, the head pipe, and the steering bar is used as a storage space, so that the head pipe that supports the front fork is connected to the main frame that extends downward from there. , is supported at multiple points by connecting pipes extending from the left and right frames, and the left and right frames supporting the handle are supported at multiple points by the main frame and the henode pipe. Therefore, the load from the handlebars and the impact from the front wheels are distributed to each part of the frame. Therefore, each pipe for supporting the head pipe can be formed with low rigidity, and the weight of the vehicle body can be reduced.

[Brief Description of the Drawings] Fig. 1 is a side view of a scooter type motorcycle according to the present invention;
FIG. 2 is an enlarged side view showing the main parts of the scooter-type motorcycle according to the present invention, and FIG. 3 is a plan view of the frame.
Figure 4 is a front view of the frame, Figures 5 and 6 are views showing other examples in which the helmet is stored in the front storage box, Figure 5 is a side view of the helmet storage area, and Figure 6 is the same. It is a front view. 2, --- Handle, 2a... Handle shaft, 8...
...Front fork, 9...Frame, 9a...
...Left frame, 9b...Right frame, 21.
... Head pipe, 22 ... Main frame, 23.
...Connection pipe, 24...Cross member, 28.
...Steering bar, 30...Front storage box, 4
1... Helmet storage box.

Claims (1)

[Claims] It includes a main frame extending downward from a head pipe that pivotally supports the front fork, and left and right frames connected to the main frame and extending upward, and a handlebar shaft is mounted on the upper ends of the left and right frames apart from the head pipe. In addition to providing a supporting shaft support, the middle part of the left and right frames is connected to the head pipe by a connecting pipe, and the handle shaft and the front fork are connected by a curved steering bar. , a scooter-type motorcycle characterized by having a storage space in a space surrounded by a head pipe and a steering bar.