JP2739466B2 - Front fender support structure for motorcycles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front fender support structure for a motorcycle.

[0002]

2. Description of the Related Art In a motorcycle, a front fork having a cushioning function is supported on a head pipe of a body frame so as to be steerable, a front wheel is supported on a lower end of the front fork, and an upper outer peripheral surface of the front wheel is provided. Many have a front fender to cover. In this case, the front fork usually includes a pair of left and right outer tubes and an inner tube that are slidably fitted to each other in the axial direction, and the two tubes mutually receive an impact that is transmitted from the front wheel to the head pipe side. It absorbs by sliding.

There is a so-called inverted type of front fork, that is, an outer tube having a larger diameter than the inner tube is supported on the head pipe side for strength reasons, and a small diameter is provided at the lower end side of each outer tube. The left and right inner tubes have front wheels supported at both lower ends thereof.

[0004] Further, there is a structure in which the relative position between the front wheel and the front fender does not change when the outer tube and the inner tube slide with respect to each other. Support plates protrude downward from both left and right sides, respectively, and the protruding ends of the respective support plates are attached to the lower ends of the corresponding inner tubes by fasteners . That is, the front wheel and the front fender are integrated via the lower end of the inner tube, so that the relative positions of the two do not change.

[0005]

The above arrangement has the following problems.

That is, first, in order for the front fender to sufficiently withstand the impact during traveling, sufficient strength is secured in the support plate. In this case, if the support plate is simply reinforced, this The support plate may become heavy and affect the controllability.

Second, during traveling on a flat road surface, the lower end of the inner tube is elastically protruded downward from the lower end of the outer tube, and the lower end of the inner tube is exposed to the outside. When the front wheel receives an impact from the road surface, the lower end of the inner tube slides into the outer tube and fits. For this reason, for example, in order not to damage the sealing material between the two tubes, it is necessary to keep the outer peripheral surface of the inner tube smooth so as not to be damaged.

However, since the inner tube is located at the lower part of the front fork and is close to the road surface, there is a possibility that a rock or the like collides and the outer peripheral surface of the inner tube is easily damaged.

Third, each inner tube is fastened to the inner tube.
The fasteners are located outside the front wheels, that is, these inner tubes and fasteners are located where they are easily hit by the traveling wind. For this reason, there is an inconvenience that the air resistance increases and the aerodynamic characteristics decrease.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. First, it is possible to achieve a solid support of a front fender with a light weight. The third object of the present invention is to prevent the outer peripheral surface of the inner tube from being damaged by a collision of a flipped stone or the like, and thirdly, to suppress an increase in air resistance due to the inner tube or the fastener .

[0011]

A feature of the present invention to achieve the above object is that a protruding end of a support plate protruding downward from both left and right sides of a front fender is attached to an inner corresponding to the same. Tighten to lower end of tube
When attached via imaging instrument, it folded so that the support plate is a sectional plan view a Hoboku-shape, supra support plate, which is a fastener and the inner tube thereof
Provided so as to cover from the front, so that the convex side of the bent portion of the support plate faces outward of the vehicle body, and the front outer surface of the support plate is inclined so as to face outward as it faces backward , and Protruding end of the support plate
Recessed inward in the vehicle width direction behind the front outer surface at
A recess is formed, and the center of the bottom plate of this recess extends in the vehicle width direction.
The inner tube is fastened to the lower end of the inner tube .

[0012]

[Operation] The operation of the above configuration is as follows.

The support plate 25 is bent so that its plane cross section is substantially in a U shape. Therefore, the section modulus of the support plate 25 is increased, that is, the strength and rigidity of the support plate 25 itself are improved. Therefore, the front fender 9 is firmly supported by the inner tube 21 by the support plate 25.

In the above case, the strength of the support plate 25 can be improved by simply bending the support plate 25. Therefore, no additional reinforcing material is required. Is achieved by preventing the support plate 25 from becoming heavy.

Further, the support plate 25 is
The inner tube 21 and the fastener 27 are covered from the front.
Migihitsuji Ah Ri provided, that the reason, when splashed stones during traveling came flying from the front, the stone intercepted by the support plate 25 to collide with the inner tube 21 and the fastener 27 Becomes

Further, since the front outer surface 34 of the support plate 25 is inclined so as to face outward as it goes rearward, the traveling wind A is smoothly guided outward and rearward by the front outer surface 34, That is, it is possible to prevent the traveling wind A from directly hitting the inner tube 21 and the fastener 27 located behind the support plate 25.

Further , the projecting end of the support plate 25 is
Recessed in the vehicle width direction behind the front outer surface 34
A recess 36 is formed, and the center of the bottom plate of the recess 36 is
Of the inner tube 21 with the fastener 27 extending in the
Fastened to the lower end.

For this reason, as described above, the fastener 27 is
Since the bottom plate of the recess 36 is fastened, the fastening
The tool 27 enters the concave portion 36 and
25, it is more reliably covered from the front, and
The rock flipped up hits the fastener 27 as described
Is more reliably blocked. Also as mentioned above
The fastener 27 fastens the bottom plate of the recess 36.
Therefore, the fastener 27 tends to enter the recess 36.
This makes it difficult to operate the fastener 27.
However, the fastener 27 has an axis extending in the vehicle width direction.
The fastener 27 is operated from the outside of the vehicle body.
Because it is easy to get into the recess 36,
Nevertheless, good operability for the fastener 27 is ensured.
Is preserved.

[0019]

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

In FIG. 2, reference numeral 1 denotes a motorcycle, and a body frame 2 of the motorcycle 1 has a head pipe 3 at a front portion thereof.

A front fork 5 is supported on the head pipe 3 so as to be steerable. The front fork 5 supports a front wheel 6 at a lower end thereof, and a handle 7 is attached to an upper end thereof. Further, a front fender 9 that covers the upper outer peripheral surface of the front wheel 6 is provided, and a disc brake 10 for the front wheel 6 is provided.

In addition, 12 is an engine, 13 is a fuel tank, and 14 is a radiator. A cowling 15 covers the front surface of the front fork 5 above the front fender 9 and the outer surfaces of the body frame 2, the engine 12, and the like. Reference numeral 16 denotes a road surface.

The front fork 5 will be described with reference to FIGS.

The front fork 5 has a steering shaft (not shown) which is rotatably fitted around the axis of the head pipe 3. The upper and lower ends of the steering shaft protrude from the head pipe 3. An upper bracket 18 is attached to the upper end of the steering shaft, and a lower bracket 19 is attached to the lower end. Then, the upper bracket 18 and the lower bracket 19 are
A pair of left and right outer tubes 20, 20 made of aluminum are fixed, that is, the outer tubes 20, 20 are rotatably supported on the head pipe 3 side around the axis of the head pipe 3.

At the lower end of each of the outer tubes 20, a pair of left and right inner tubes 21 and 2 made of steel is provided.
1 is fitted slidably in the axial direction. Each inner tube 21 has an axle bracket 22 made of aluminum at its lower end.
The front wheel 6 is supported on the axle bracket 22 via an axle 23.

During traveling when the road surface 16 is flat,
The lower end of each inner tube 21 is elastically protruded downward from the lower end of the outer tube 20. When the front wheel 6 receives an impact from the road surface 16, the inner tube 21 slides on the outer tube 20. 1 (indicated by a phantom line in FIG. 1), and at this time, the impact is absorbed.

1 to 4, the front fender 9 is made of carbon FRP, which is provided between the left and right outer tubes 20, 20, and is supported downward from both left and right sides of the front fender 9, respectively. A plate 25 is integrally provided. On the other hand, a support arm 26 protrudes upward from a front portion of the axle bracket 22, and a pair of upper and lower bolts is attached to the support arm 26.
Each of the support plates 25 is fastened by the fastener 27 composed of
Is screwed at its protruding end (lower end) . Then, by this, the front fender 9 is moved to the inner tube 21,
21 supported.

The disc brake 10 is mounted on the front wheel 6.
Caliper 30 that has a brake disc 29 that rotates with the
Is screwed by a pair of bolts 32, 32 to a support arm 31 protruding from a rear portion of the axle bracket 22.

The support plate 25 will be described in detail below with reference to all drawings.

The support plate 25 is bent so that its plane cross section is substantially U-shaped.
The support plate 25 is provided with sufficient strength and rigidity to support the front fender 9.
Further, the support plate 25, which is provided so as to cover from the front and a fastener 27 and the inner tube 21
For this reason, when a stone or the like jumped up during traveling travels from the front, the stone is removed from the inner tube 21.
The collision with the fasteners 27 causes the support plate 25 to block.

Further, the support plate 25, the convex side of the bent portion of that has been made form the Hare by toward the outer side of the vehicle body, outer side 34 before located in front half of the support plate 25 at the rear The rear outer surface 35 located in the rear half of the support plate 25 extends in the vehicle width direction so as to face the lower portion of the outer tube 20 and each front surface of the inner tube 21. I have.

Therefore, the traveling wind A is smoothly guided outward and rearward by the front outer surface 34, that is, the traveling wind A is transmitted to the lower end of the outer tube 20 , the inner tube 21 and
Direct hitting of the fastener 27 is prevented.

At the protruding end (lower end) of the support plate 25 ,
Concave inward in the vehicle width direction definitive rear side of the front outer side surface 34
Recess 36 is formed, and the bottom plate of the recess 36
It is fastened to the lower end of the inner tube 21 via the support arm 26 by the fastener 27 extending in the vehicle width direction .

The lower end of the support plate 25 is closed by a bottom plate 37 integrally formed with the support plate 25. That is, the bottom plate 37 also improves the strength of the lower end of the support plate 25. .

Further, the support plate 25 is reinforced in the following manner.

That is, as shown in FIG. 1, FIG. 6, FIG. 8, and FIG. 9, a hard foam material 39 is firmly attached to the front inner side surface of the support plate 25. This hard foam material 3
The upper part of 9 is adhered to the upper surface of the front fender 9, and the lower part is firmly adhered to the inner surface of the concave portion 36 and the upper surface of the bottom plate 37.

Further, another hard foam material 40 is firmly attached also to the rear inner side surface of the support plate 25.
Each of the hard foam materials 39 and 40 is further covered with a carbon kepler cloth 41, which is an aramid fiber, and thereby is firmly fixed to the support plate 25.

Although the above description is based on the illustrated example, the front fender 9 and the support plate 25 may be separate bodies. Further, the front outer surface 34 may be an arc convex surface or an arc concave surface.

[0039]

According to the present invention, the following effects can be obtained.

That is, first, since the support plate is bent so that its plane cross section is substantially in a U shape,
The section modulus of the support plate is increased, that is, the strength and rigidity of the support plate itself are improved. Therefore, the front fender will be firmly supported more inner tubes on the support plate.

In the above case, the strength of the support plate can be improved by simply bending the support plate. Therefore, no additional reinforcing material is required. This is achieved by preventing the plate from becoming heavy. Therefore, even when the front fender is firmly supported, occurrence of inconvenience that affects the maneuverability is prevented.

Second, the support plate is
But covering the fastener and the inner tube from the front
With this arrangement, when a stone that is flipped up during traveling travels from the front, the stone collides with the inner tube or the fastener and is blocked by the support plate. Therefore, damage to the inner tube and the fastener is prevented.

Further, since the strength of the support plate is improved as described above, the support plate can sufficiently withstand the collision of the stone, and therefore, the inner tube and the tightening member can be tightened.
It is this support plate that the stone collides with the fixture ,
More reliably prevented.

Third, since the front outer surface of the support plate is inclined so as to face outward as it goes rearward, traveling wind is smoothly guided to the outside and rear by the front outer surface, That is, it is possible to prevent the traveling wind from directly hitting the inner tube or the fastener located behind the support plate. Therefore, an increase in aerodynamic resistance is suppressed accordingly, which is beneficial in aerodynamic characteristics.

Fourth, the projecting end of the support plate
Recessed inward in the vehicle width direction behind the front outer surface at
A recess is formed, and the center of the bottom plate of this recess extends in the vehicle width direction.
To the lower end of the inner tube.
You.

Therefore, as described above, the fastener is
Because the bottom plate of the recess is fastened, the fastener is
Enter the recess and use the support plate to
Indeed, it is covered from the front, so it jumps up as described above
The impact of the set stones on the fasteners is more reliably blocked.
Can be In addition, as described above, the fastener is formed by fixing the bottom plate of the concave portion.
To be fastened, the fastener is inserted into the recess.
It is difficult to operate this fastener
However, the above-mentioned fastener has an axis extending in the vehicle width direction.
The above fasteners are easy to operate from the outside of the vehicle body
Therefore, it is easy to get into the recess
Nevertheless, good operability is ensured for the fastener.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of FIG. 2;

FIG. 2 is an overall side view of the motorcycle.

FIG. 3 is a perspective view of a front portion of a vehicle body.

FIG. 4 is a partial front view of a front fender and a support plate.

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

FIG. 6 is an enlarged view taken along line 6-6 of FIG. 1;

FIG. 7 is a sectional view taken along line 7-7 in FIG. 1;

FIG. 8 is a partially enlarged view of FIG. 7;

FIG. 9 is a sectional view taken along line 9-9 of FIG. 1;

[Explanation of symbols]

Reference Signs List 1 motorcycle 2 body frame 3 head pipe 5 front fork 6 front wheel 9 front fender 20 outer tube 21 inner tube 25 support plate 27 fastener 34 front outer surface 36 recess

Claims (1)

(57) [Claims] A pair of left and right outer tubes in which a front fork is supported on a head pipe side of a vehicle body frame;
A pair of left and right inner tubes fitted slidably in the axial direction is provided at the lower end side of each of these outer tubes. In a motorcycle in which support plates protrude downward from both left and right sides of the front fender, and the protruding ends of the respective support plates are attached to the lower ends of the corresponding inner tubes by fasteners . , bent to the support plate plane cross section a Hoboku-shape, supra support plate, which is provided so as to cover the fastener and the inner tube from its front, bent above <br/> support plate So that the convex side of the part faces the outside of the vehicle body, and turns outward as the front outside surface of the support plate faces rearward. Cormorant is inclined, and, above
The rear side of the front outer surface at the protruding end of the support plate
A concave portion which is concave inward in the vehicle width direction, and a bottom plate of this concave portion
With the above fasteners whose axis extends in the vehicle width direction.
Front fender support structure for motorcycles fastened to the lower end of the drive.