JPH0434156Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a frame member for a two-wheeled motor vehicle, for example, for constructing a frame body of a motorcycle.

(Prior Art) A frame member for a two-wheeled motor vehicle is conventionally known in which a partition wall for partitioning an internal space is provided inside a frame member main body having a closed hollow cross-sectional shape.

(Problem to be solved by the invention) However, in such frame members,
When the bending process is performed, the bending stress of the inner wall is transmitted to the outer wall through the partition wall, and as a result, the outer wall near the partition wall is abnormally bulged and deformed, resulting in poor appearance. There was a problem with the damage.

The present invention was developed in view of the above circumstances, and although a partition wall is provided inside the frame member body with a closed hollow cross-sectional shape to partition the internal space, abnormal deformation of the wall during bending is prevented. It is an object of the present invention to provide a frame member for a two-wheeled motor vehicle that does not impair its appearance.

(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, each front end is fixed to a head pipe that holds the steering wheel shaft of the front wheel, each intermediate part is spaced at a constant interval, and, Each rear end is a pair of frame member bodies configured to extend in an inclined downward direction,
The frame member main body has a rectangular cross section,
Its cross section is longer in the vertical direction than in the horizontal direction, and is formed into a closed hollow cross section with a ceiling wall, a bottom wall, and both side walls, and the frame member main body includes:
At least one partition wall is provided to partition the internal space into upper and lower sections, and each of the frame member main bodies is provided at a portion of the outer surface of the side wall where the outer wall and the partition wall are connected. It is characterized in that a corresponding recess is formed.

(Function) According to the above configuration, when bending the frame member main body in order to fix the front end of the frame member main body to the head pipe, the bending stress of the inner side wall is transferred to the outer side through the partition wall. Even if it is transmitted to the outer side wall, it is absorbed into the recess near the partition wall of the outer side wall, thereby avoiding abnormal deformation.

(Example) Examples of the present invention will be described below based on the drawings.
First, one embodiment of the present invention will be described based on FIGS. 1 to 4. Fig. 1 is a side view of a motorcycle to which the present invention is applied, in which 1 indicates the entire motorcycle, 2 its frame body, 3 the fuel tank,
4 is the cowling, 5 and 6 are the front and rear wheels, and 7
is a rear fork. As shown in FIGS. 2 and 3, the frame body 2 has left and right (only one side is shown) main frames 9, one end of which is welded and fixed to a head pipe 8. The main frame 9 is constituted by a frame member 10 for a two-wheeled motor vehicle according to the present invention. The frame member 1
As shown in FIG. 4, 0 is a metal frame member main body 10a having a closed rectangular (or circular) hollow cross-sectional shape, and partition walls 10b and 10c that divide the internal space into three equal parts, for example, are longitudinally arranged. Two narrow slit-shaped recesses 10d are provided throughout the longitudinal direction near the partition walls 10b and 10c on the outer surface of both side walls of the frame member main body 10a. There is. (still,
This recessed portion 10d may be provided only on the outer wall surface of the side that is on the outside during bending. ) These recesses 10d allow
The frame member 10 is indicated by arrow A as shown in FIG.
This prevents abnormal deformation of the outer surface of the wall when bending is performed, such as in a section. That is, when the bending process is performed as shown by the arrow A, the frame member body 10 is bent through the partition walls 10b and 10c.
Stress due to bending of the inner wall is transmitted to the outer wall of the recess 10d.
As a result, abnormal bulging deformation can be prevented and the deformation can be kept to an almost inconspicuous level, without damaging the appearance.

In addition, 11 in FIGS. 1 to 3 is a left and right circular pipe (only one side is shown), which is a circular pipe whose one end is welded and fixed to approximately the middle part in the length direction of the left and right main frames 9 and the other end extends rearward. ), and their extending ends are connected to each other by a connecting frame 12. Also, 13a in Figures 2 and 3,
Reference numerals 13b and 13c are cross members interposed between the left and right main frames 9 at one end, an intermediate portion, and the other end, respectively.

(Effects of the invention) As detailed above, the frame member for a two-wheeled motor vehicle of the present invention has each front end fixed to the head pipe that holds the steering handle shaft of the front wheel, and each middle part is spaced at a constant interval, and Each rear end is a pair of frame member bodies configured to extend in an inclined downward direction, the frame member bodies having a rectangular cross section, the cross section being longer in the vertical direction than in the horizontal direction;
The frame member body is formed into a closed hollow cross-sectional shape with a ceiling wall, a bottom wall, and both side walls, and the frame member main body has at least a
One partition wall is provided, and each of the frame member main bodies has a recess formed in the outer surface of the side wall corresponding to a portion where the outer wall and the partition wall are connected. Because of the characteristics, although a partition wall is provided inside the frame member main body having a closed hollow cross-sectional shape to partition the internal space,
The bending stress transmitted from the partition wall to the outer wall during bending is absorbed by the recesses on the outer surface of the outer wall, preventing abnormal deformation of the outer wall and causing no damage to the external appearance. It can be played.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Figure 1 is a side view of a motorcycle to which the present invention is applied;
Figure 2 is a side view of the same frame body, Figure 3 is a partially omitted plan view, and Figure 4 is the -
It is a sectional view along a line. 10... Frame member for two-wheeled motor vehicle, 10a...
...Inner frame member, 10b, 10c...Dividing wall, 10d...Recess.

Claims (1)

[Scope of utility model registration request] A pair of frame member bodies, each of which has its front end fixed to a head pipe that holds a steering handle shaft of the front wheel, whose intermediate portions are spaced apart from each other by a certain distance, and whose rear ends extend in a downwardly inclined direction. , the frame member main body has a rectangular cross section, the vertical direction of the cross section is longer than the horizontal direction, and the ceiling wall, the bottom wall, and both side walls are formed into a closed hollow cross section, and The frame member main body includes
At least one partition wall is provided to partition the internal space into upper and lower sections, and each of the frame member main bodies is provided at a portion of the outer surface of the side wall where the outer wall and the partition wall are connected. A frame member for a two-wheeled motor vehicle, characterized in that a corresponding recess is formed.