Shock absorbing construction for motorcycles

Details Shock absorbing construction for motorcycles Shock absorbing construction for motorcycles

2001-12-27

2003-04-15

Dayoan, D. Glenn (Department: 3612)

Vehicle fenders

Buffer or bumper type

For use on two or three wheel cycle

C293S102000, C296S182100, C296S182100

Reexamination Certificate

active

06547294

ABSTRACT:

CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims priority under 35 USC 119 to Japanese Patent Application No. 2000-396770 filed on Dec. 27, 2000 the entire contents thereof is hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a shock absorbing construction for motorcycles in which a shock absorbing member projecting from the vehicle body is provided so that the shock absorbing member absorbs the impact by collapsing.
2. Description of Background Art
FIG. 7
is a side view of a shock absorbing construction for a motorcycle according to related art. A shock absorbing member
105
is mounted above a front wheel
104
which is mounted on a fork
103
on the head pipe
102
provided on a vehicle body frame
101
of a motorcycle
100
. A deforming element (hereinafter referred to as “shock absorbing member”)
105
is mounted at the front end of the vehicle body frame
101
.
The shock absorbing member
105
is manufactured by filling foam material
108
in a hollow portion of a frame body
106
.
FIGS.
8
(
a
) and
8
(
b
) are explanatory drawings showing the operation of the shock absorbing construction for motorcycles of the related art.
In FIG.
8
(
a
), when a motorcycle
100
(shown in
FIG. 7
) comes into collision with an obstruction, the tip portion
105
a
of the shock absorbing member
105
hits the obstruction, and an impact force F
1
generated by collision acts on the tip portion
105
a
as shown by the arrow.
In FIG.
8
(
b
), when an impact force F
1
acts on the tip portion
108
a
of the foam material
108
, the tip portion
108
a
is collapsed. Accordingly, by collapsing the tip portion
105
a
of the shock absorbing material
105
as much as the amount of collapse L
1
, an impact force F
1
is absorbed to protect the occupant.
Incidentally, when the tip potion
108
a
of the foam material
108
is collapsed, the space in the foam material
108
is decreased, and thus it resists being collapsed. Therefore, when the foaming space is too small, it is difficult to ensure a sufficient amount of collapse of the shock absorbing member
105
, and thus an impact force cannot be absorbed sufficiently.
In order to absorb an impact force sufficiently, it is conceivable to increase the foaming space in the foam material
108
so that the amount of collapse of the foam material
108
is also increased.
However, when the forming space in the foam material
108
is too much, the foam material
108
can be collapsed easily. Therefore, in order to absorb an impact force by means of the foam material
108
with a large amount of foaming space, it is required to increase the size of the foam material
108
to ensure the increased amount of collapse of the foam material
108
. As a consequent, the dimensional standard of the shock absorbing member increases too much and thus it is difficult to put it into practical use.
SUMMARY AND OBJECTS OF THE INVENTION
Accordingly, it is an object of the present invention to provide a shock absorbing construction for motorcycles that has a dimensional standard suitable for practical use that can absorb the impact force sufficiently.
In order to achieve the object described above, the present invention provides a shock absorbing construction for motorcycles including a shock absorbing member projecting from the vehicle body that allows the shock absorbing member to absorb an impact force by collapsing. The shock absorbing member includes a plurality of cavities and a reinforcing rib for dividing the adjacent cavities. All or some of the reinforcing ribs are formed with a thinner portion.
By forming a thinner portion on all or some of the reinforcing ribs, the strength of the reinforcing ribs can be controlled. Therefore, the strength of the shock absorbing member can be adequately adjusted for the impact force.
In addition, providing a plurality of cavities helps to accommodate the reinforcing ribs in these cavities when the shock absorbing member is collapsed. Therefore, a sufficient amount of collapse of the shock absorbing member is ensured.


REFERENCES:
patent: 4311335 (1982-01-01), Winiecki
patent: 4413856 (1983-11-01), McMahan et al.
patent: 4427214 (1984-01-01), Haggkvist
patent: 5462144 (1995-10-01), Guardiola et al.
patent: 5636866 (1997-06-01), Suzuki et al.
patent: 5700545 (1997-12-01), Audi et al.
patent: 6062632 (2000-05-01), Brachos et al.
patent: 6247745 (2001-06-01), Carroll et al.
patent: 197809 (1978-09-01), None

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