JPH08332982A - Front fork protector for motorcycle - Google Patents

Abstract

PURPOSE: To provide a front fork protector for a motorcycle that can cool liquid coolant well by making travel wind sufficiently reach a cooling device and can fit and remove the protector easily. CONSTITUTION: In a motorcycle 1 provided with a cooling device 14 for cooling an engine 13, behind a front fork 4, the cross-sectional form of protectors 29l, 29r for covering the peripheral surface of the front fork 4 for protection is formed into streamline shape, and the rear half part 30r of each protector is fitted removably from the front half part 30f of the protector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front fork protector for a motorcycle. More specifically, the present invention relates to a front fork protector for a motorcycle in which a cooling device such as a radiator or an oil cooler is arranged behind the front fork.

[0002]

2. Description of the Related Art A dedicated motorcycle designed or manufactured or modified for a motorcycle competition is called a racing machine, and road races, motocross and trials are famous as competitions currently being conducted. Among the machines used for these competitions, the motocrosser and trialer machines are equipped with a number plate instead of the headlight at the headlight mounting part of the on-road bike.

Further, as shown in FIGS. 9 and 10, in a recent number plate a, a protector b for integrally protecting a front fork from gravel, pebbles, etc. by extending both ends of a lower edge thereof downward is integrally formed. Those which are formed are proposed. Normally, the shape of such a protector b is a semi-cylindrical shape so as to cover the front half of the front fork c, so that the traveling wind that hits the protector b while the machine is traveling is the front fork c and the cooling device d such as a radiator. It is conceivable that a turbulent turbulent flow e · e ··· as shown in FIG. 11 is generated between them, and the cooling liquid d does not reach the cooling device d, so that the cooling liquid (not shown) in the cooling device d is not sufficiently cooled.

In addition, in order to have a good time in the race,
Since it is desired to process the protector promptly when the protector needs to be replaced, it has been desired to provide a technique capable of easily attaching and detaching the protector.

[0005]

SUMMARY OF THE INVENTION The present invention has been invented in view of the above-mentioned circumstances, and the problem to be solved is to cool a cooling device such as a radiator so that traveling wind can sufficiently cool it. It is an object of the present invention to provide a front fork protector for a motorcycle, which can cool the liquid sufficiently and can easily attach and detach the protector.

[0006]

The present invention is to solve the above problems and is as follows.
That is, the front fork protector of the motorcycle of the present invention is a motorcycle having a cooling device such as a radiator or an oil cooler behind the front fork, and the cross-sectional shape of the protector that covers and protects the outer peripheral surface of the front fork flows. The protector has a linear shape, and the latter half of the protector is detachably attached to the former half of the protector.

[0007]

Therefore, according to the present invention, the protector for covering and protecting the outer peripheral surface of the front fork is made to have a streamline cross-sectional shape, so that the flow of the traveling wind which hits the protector while the machine is traveling becomes smooth. Eddy will not occur. Further, since the air resistance can be reduced, the flow of the traveling wind toward the cooling device becomes quick.
Therefore, the traveling wind can be sufficiently supplied to the cooling device such as the radiator in a short time. Further, since the protector rear half is detachably attached to the protector front half, the front fork to which the protector is attached is sandwiched between the front half and the rear half of the protector.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings with reference to the accompanying drawings. FIG. 1 is a partially cutaway perspective view of a motorcycle 1 adopting a front fork protector for a motorcycle according to the present invention, and FIG. 2 shows a number plate 26 provided with front fork protectors 29l, 29r for a motorcycle according to the present invention. Enlarged perspective view, FIG. 3 is FIG.
5 is an enlarged cross-sectional view taken along a plane including the III-III line of FIG. 5 and viewed in the direction of the arrow, and is a view showing a state in which traveling wind is directed to the radiator 14, FIG. 4 is an enlarged cross-sectional view of a region VI portion of FIG. 3 is an enlarged exploded perspective view of a main part of FIG. 3, FIG. 6 is a view seen from an arrow VI direction of FIG. 5, and FIG. 7 is a view showing a first modified example of the front fork protectors 29l and 29r of the motorcycle according to the present invention. FIG. 8 is a diagram showing the second modification.

As shown in FIG. 1, the motorcycle 1 has a lower end portion of an upright front fork 4 (hereinafter, simply referred to as "fork 4") steered by a bar handle 3 on a front portion of a vehicle body frame 2. A front wheel 6 covered with a front fender (not shown) is rotatably supported.

A fuel tank 11 is arranged above the vehicle body frame 2. An engine 13 is mounted in the central internal space of the body frame 2, and a radiator (oil cooler) 14 as a cooling device for cooling the engine 13 is disposed diagonally above and in front of the engine 13.

The fork 4 is fitted in a head pipe 19 in the front part of the vehicle body frame 2 and is rotatably provided with respect to the head pipe 19 via a steering stem which is not visible, and both upper and lower brackets 21 are provided. , 22 a pair of left and right steel inner tubes 23l and 23r fixed to the left and right sides of the inner tube 23 and the inner tubes 23l and 23r below the pair of inner tubes 23l and 23r. The left and right outer tubes 24l and 24r are made of aluminum alloy or other light alloy or steel that allows the inner tubes 23l and 23r to expand and contract in a given state.

Also, both the upper and lower brackets 2
The rectangular number plate 26 covers the area surrounded by the upper half of the inner tubes 23l and 23r of the left and right inner tubes 23l and 23r between the upper and lower brackets 21 and 22 from the front surface. And lower bracket 22 with screws 28.2.
It is fixed by 8 (see FIG. 2).

Left and right protectors 29l and 29r for protecting lower half portions of the left and right inner tubes 23l and 23r, which are mainly components of the fork 4, from the lower edges of the number plate 26 and below the protectors 29l and 29r. The protector front halves 30f and 30f, which are a part of the protector, are integrally extended, and protector front halves 30f and 30f are provided with protector rear halves 30r and 30r that are detachable from the protector front halves 30f and 30f. There is. However, the protectors 29l and 29r may be extended further downward so as to cover the entire outer tubes 24l and 24r or a range close thereto.

The cross sections of the protectors 29l and 29r, which consist of the front half 30f and the rear half 30r of the protector, are streamlined. The streamline shape here means
The flow around the above-mentioned shape when the fluid flows through those surfaces, such as the longitudinal section of raindrops or teardrops that gradually narrows toward the rear of the vehicle or the transverse section of the wing of an airplane, and the elongated elliptical shape such as a rugby ball. Is smooth and does not generate vortices.

In this embodiment, as shown in FIG. 3, the protectors 29l and 29r are formed so that the protectors 29l and 29r have a cross section such as raindrops which gradually narrows toward the rear of the vehicle. The front half portion 30f is a semi-cylindrical body having a semicircular cross section, and the protector rear half portion 30r has a shape such that it converges gently to the buttocks.

Further, in order to integrate the both, both edge portions 32, 32 of the protector front half portion 30f are shown in FIGS.
As can be seen from the above, it is formed stepwise with respect to the main body 34,
.. for attaching the protector rear half portion 30r to the protector front half portion 30f are provided at the boundary portion between the both edge portions 32, 32 and the main body 34.
-It is formed at regular intervals in the longitudinal direction of 30f.

On the other hand, in the latter half portion 30r of the protector, engaging claws 40, 40, 40 are formed on both edge portions 38, 38 of the protector front half portion 30f in correspondence with the engaging holes 36 ,.
... are formed.

When the protector front half portion 30f and the protector rear half portion 30r are integrated, both are shown in FIG.
As shown in FIG. 6, the fitting width B of the front half 30f of the protector is larger than the fitting width A of the rear half 30r of the protector.
Both edge portions 38 of the protector rear half portion 30r may be widened in the direction indicated by the middle arrow C. In addition, when removing, the protector front half portion 30f may be pressed by the two-dot chain line so as to reduce the diameter.

The front half 30f of the protector and the rear half 30r of the protector are attached to the front half 30f of the protector and the rear half 30r of the protector as described above.
Instead of providing 40, the first and second modifications shown in FIGS. 7 and 8 may be performed.

More specifically, in the first modified example of FIG. 7, the edge portions 32, 32 of the protector front half portion 30f are formed.
And one edge 38 of the protector rear half 30r.
38 is integrally formed via a hinge 39, and the other edge 32 of the protector front half portion 30f and the other edge 38 of the protector rear half portion 30r are engaged via the engaging means as described above. It is supposed to do. By using the hinge 39, the protector front half portion 30f and the protector rear half portion 30r can be managed together, and the protector rear half portion 30r is disengaged from the protector front half portion 30f even if something hits. You can turn it off.

Further, in the second modification, the protector front half portion 30f is replaced by a screw 40 instead of the engaging means.
And the latter half 30r of the protector are integrated.

Thus, in the front fork protector 29l, 29r of the motorcycle thus constructed, the cross-sectional shape of the protector 29l, 29r for covering and protecting the outer peripheral surface of the fork 4 becomes closer to the rear of the vehicle. Since it has a streamlined cross-sectional shape such as raindrops that gradually narrowed,
While the motorcycle is traveling, the flow of the traveling wind hitting the protectors 29l and 29r is rectified and smoothed as shown by the arrows in FIGS. 3, 7, and 8, so that no eddy turbulence occurs.

Further, since the air resistance can be reduced, the flow of traveling wind toward the radiator 14 which is a cooling device becomes quick. Therefore, since the traveling wind can be sufficiently supplied to the radiator 14 in a short time, the cooling liquid can be sufficiently cooled.

Since the protector rear half 30r is detachably attached to the protector front half 30f, the protector 29l can be easily attached to and removed from the vehicle body.

[0025]

According to the front fork protector of the motorcycle of the present invention, since the traveling wind can be sufficiently supplied to the cooling device such as the radiator in a short time, the cooling liquid can be sufficiently cooled. Further, since the protector rear half is detachably attached to the protector front half, the protector can be easily attached and detached.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a motorcycle adopting a front fork protector of the motorcycle according to the present invention.

FIG. 2 is an enlarged perspective view of a number plate including a front fork protector of the motorcycle according to the present invention.

FIG. 3 is an enlarged cross-sectional view taken along a plane including a line III-III in FIG. 1 and viewed in a direction of an arrow, and is a diagram showing a state in which traveling wind is directed to a radiator.

FIG. 4 is an enlarged sectional view of a region IV portion of FIG.

5 is an enlarged exploded perspective view of a main part of FIG.

6 is a view as seen from the direction of arrow VI in FIG.

FIG. 7 is a diagram showing a first modification of the front fork protector of the motorcycle according to the present invention.

FIG. 8 is a diagram showing a second modification of the same.

FIG. 9 is a diagram for explaining a conventional technique.

10 is an enlarged perspective view of a main part of FIG.

FIG. 11 is a diagram showing a problem of the conventional technique.

[Explanation of symbols]

 1 Motorcycle 4 Front Fork 13 Engine 14 Cooling Device 29l Protector 29r Protector 30f Protector First Half 30r Protector Second Half

Claims (1)

[Claims] 1. A motorcycle having a cooling device for cooling an engine behind a front fork, wherein a protector for covering and protecting an outer peripheral surface of the front fork has a streamline cross-sectional shape, and A front fork protector for a motorcycle, characterized in that the rear half of the protector is detachably attached to the front half of the protector.