JPH03204384A - Front fender of motor-bicycle - Google Patents

Abstract

PURPOSE:To effectively lead a running wind from a front fender inside a motor- bicycle body by connecting a covering member to cover a front side of a headpipe to the front fender, and forming a guide hole to guide the running wind inside the bicycle body near a connecting part of the covering member. CONSTITUTION:A covering member 116 to cover the front side of a headpipe 2 is connected to an upper guide part 5e formed on a front part 5b of a front fender 5, and attached to an upper bracket 102 through bolts 117 at its upper middle portion, and engaged with the upper guide part 5e of the fender 5 at its lower portion. Guide holes 118 are formed on both sides near a connecting part between the guide part 5e and the member 116 to lead running wind flowing along an upper face of the front part 5b of the fender 5 inside a bicycle body. Thus the running wind flows between an upper face of the fender 5 and a lower bracket 103, and moreover above the bracket 103 and then toward a radiator 44 and an engine to cool those parts.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a front fender of a motorcycle, and more specifically, to a front fender of a motorcycle that can guide running wind from the front fender into the inside of the vehicle body. .

[Prior Art] Some motorcycles include a pair of left and right front forks attached to a steering shaft provided in a head pipe via an upper bracket and a lower bracket. A front fender extending in the front-rear direction is provided between the pair of left and right front forks below the lower bracket, and a radiator and an engine may be disposed at the rear of the front fender.

[Problems to be Solved by the Invention] For example, in a motor vehicle used for motocross competitions, a cover member that covers the front side of the head pipe is connected to the front fender, and the number holder is attached to this cover member, or This component protects the rider from wind, rain, and even mud.

By the way, when the cover member that covers the front side of the head pipe is connected to the front fender in this way, the running air is blocked from hitting the radiator, engine, etc. located behind the front fender, and the cooling efficiency of these items is reduced. .

For this reason, it is conceivable to form a hole in the front fender or cover member, for example, but in this case, it is necessary to prevent mud etc. from scattering to the radiator side due to the rotation of the front wheel.
Care must be taken to effectively guide the driving wind to the radiator and engine located behind the front fender.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a front fender for a motorcycle that can effectively guide running wind from the front fender into the inside of the vehicle body.

[Means for Solving the Problems] In order to solve the above problems, the front fender of the motorcycle of the present invention is provided with a pair of left and right front forks connected to a steering shaft provided in the head vibe via an upper bracket and a lower bracket. , in a motorcycle comprising a front fender extending in the front-rear direction between the pair of left and right front forks at a position below the lower bracket, a cover member that covers the front side of the head vibe is connected to the front fender; A feature is that a guide hole is formed near the connection part (-1) to guide the running wind into the inside of the vehicle.

[Operation] In this invention, a front fender extending in the front-rear direction is provided between a pair of left and right front forks, and a cover member that covers the opposite side of the head vibrator is connected to this front fender. For example, a bicycle holder or the like can be attached to this cover member, and the cover member protects the rider from wind, rain, mud, and the like.

In addition, a guide hole is formed near the connection between the front fender and the cover member, and the driving wind can be guided from this guide hole into the vehicle body along the upper and side surfaces of the front fender, allowing cooling air to flow through the guide hole. It is possible to effectively cool the radiator and engine.

[Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

Figure 1 is a side view of a motorcycle to which this invention can be applied;
The figure is a plan view, Figure 3 is a front view, Figure 4 is a side view of the front wheel, Figure 5 is a sectional view taken along the line V-V in Figure 4, Figure 6 is an enlarged side view of the main parts, Figure 7 is The figure is a sectional view taken along ■-■ in Fig. 6, Fig. 8 is a sectional view taken along ■-■ in Fig.
FIG.

This motorcycle is used for riding on rough terrain, for example, in motocross competitions, and an inverted front fork 3 is attached to a head vibrator 2 that constitutes a body frame 1. A front wheel 4 is provided at the bottom of the inverted front fork 3, and a fixed fender 5 is provided above the front wheel 4.

A box-shaped frame 7 is welded to the rear of the head vibe 2,
A pair of left and right tank rails 9 having a rectangular cross section are welded to both side surfaces of the box-shaped frame 7 via a connecting frame 8 that extends left and right to the rear. The box-shaped frame 7, the connecting frame 8, and the tank rail 9 constitute a pair of left and right main frames 10 with a rectangular cross section that connect the head vibe 2 and the upper part of the rear arm pivot downward from the head vibe 2 in a side view. There is. A pair of left and right sub-frames 11 are connected via bolts 81 to a mounting bracket 80 welded to the connecting portion of the connecting frame 8 and tank rail 9 that constitute the main frame 10, and a rear arm bracket 12 is connected to the rear side. The rear part of the subframe 11 is connected to this rear arm bracket 12 via a bolt 82. Furthermore, the box-shaped frame 7 welded to the head vibrator 2 is orthogonal to the axial direction L1 of the head vibrator 2, and the tank rail 9 is welded to the box-shaped frame 7 via a connecting frame 8. The axial direction L2 of the head vibrator 2 is inclined downward with respect to the axial direction L1 of the head vibrator 2, and is welded so as to form an acute angle of 90 degrees or less.

By welding the tank rail 9 to the box-shaped frame 7 welded to the head vibrator 2 via the connecting frame 8 so that the axial direction L2 of the tank rail 9 is at an acute angle with the axial direction L1 of the head vibrator 2, the tank rail 9 can be shaped into a straight line. The main frame 10 is lightweight and has improved rigidity.

A cross vibe 13 is connected between substantially central portions of the pair of left and right tank rails 9, and this cross vibe 13 improves the strength of the main frame 10 mainly in the torsional direction. An engine mounting bracket 14 is welded to the lower side of this cross vibe 13, a cylinder 16 of an engine 15 is supported by this engine mounting bracket 14, and mounting brackets 17 and 18 are attached to the subframe 11 on the lower and front sides of the engine 15. The rear side of the engine 15 is supported by a rear arm pivot 1 on a rear arm bracket 12.
9.

This rear arm pivot 19 is pivotally supported between a pair of left and right rear arm brackets 12.
A pair of left and right rear arms 20 are pivotally supported, and a rear wheel 21 is provided at the rear of the rear arms 20 via an axle 22. The link 2 is attached to the rear arm 20 via the support shaft 23.
4 is connected to the rear arm bracket 12, and a link 26 which is pivotally supported on the rear arm bracket 12 via a support shaft 25 is connected to this link 24. A lower end 27a of a reaction 27 is connected to this link 26, and an upper end 27b of the reaction 27 is connected to a support bracket 2 welded to the cross vibe 13.
It is pivoted on 8.

Seat rails 30 are connected to a pair of left and right support brackets 29 provided on the cross vibe 13, and each seat rail 30 is connected to a backstay 31, 32.
It is supported by the rear arm bracket 12 via.

Further, the rear portion of the seat rail 30 is connected by a cross vibe 91.

The front part 30a of the seat rail 30 is narrower than the width of the rear part 30b or the main frame 10 due to the riding position, but by providing the front part 30a of the pair of left and right seat rails 30 to the cross vibe 13 provided on the tank rail 9, , the front portion 30a of the seat rail 30 can be made narrower, making it possible to create a structure that is optimal for the riding position. Furthermore, it is possible to construct a lightweight vehicle body frame that is easy to connect to the seat rail 30, has high strength, and is lightweight.

An air cleaner 33 is arranged in a space surrounded by the seat rail 30, the tank rail 9, and the backstays 31 and 32. This air cleaner 33 is connected to a carburetor 34 connected to the cylinder 16 of the engine 15 via a duct 35, and this duct 35 is placed close to the left side of the vehicle body so as not to interfere with the reaction 27. Also, the air cleaner 33 is located behind the rear suspension 27 on the seat 5.
6 so as not to interfere with the reaction 27. This air cleaner 33 has an air suction port 33a formed in the upper part thereof, and air suction ports are formed in four parts (not shown) at the rear.

An exhaust pipe 36 is connected to the front side of the cylinder 16 of the engine 15, and the exhaust pipe 36 is bent from the left side to the right side of the vehicle body below the front side of the subframe 11, and extends from the right side to the rear. The exhaust pipe 36 extends obliquely upward and rearward from below the air cleaner 33 along a recess 33b formed in the air cleaner 33, and a silencer 37 is connected to the exhaust pipe 36. This silencer 37 is the backstay 3 on the right side.
1 to a shape along the seat rail 30, and is attached to the backstay 31 with a fitting 38 and to the seat rail 30 with fittings 39 and 40. The right back stay 31 is positioned in front of the left back stay 32 in order to secure a space for arranging the silencer 37.

A cross fender 41 is attached to the rear of the seat rail 30, and side covers 43 are attached to both sides of the seat rail 30.

A radiator 44 is arranged in front of the engine 15, and the lower part of this radiator 44 is attached to the subframe 11 with screws 70.
The upper part is attached to the mounting boss 80a of the mounting bracket 80 with screws 71.

The radiator 44 is connected to the engine 1 via pipes 45 and 46.
It is connected to cylinder 16 of engine 1 and circulates cooling water.
5.

Both sides of this radiator 44 are covered with a radiator cover 407, and the lower part of this radiator cover 47 is covered with screws 4.
8 is attached to the mounting boss 44m of the radiator 44, the front side of the upper part is attached to the box-shaped frame 7 with screws 49, and the rear side is attached to the attachment boss 51 welded to the lower part of the tank rail 9 with bolts 50, and the tank rail 9 and the connection are attached. It is flush with the outer surface of the rail 8. The seat surface of the portion of the radiator cover 47 to which the bolt 50 is attached is a recess 47e, so that the bolt 50 does not protrude.

In this way, the radiator cover 47 has the same continuous surface as the outer surface of the tank rail 9 and the connecting frame 8, and does not have a connection structure that overlaps with the main frame 10 side, so there is no unevenness and the rider can easily You can hold it to keep your posture smooth, and it won't get in the way when you put your foot forward when turning a corner.

Further, a pair of left and right radiator covers 47 are attached so as to open forward, and cool the radiator 44 by introducing running air. This radiator cover 47 is the tank rail 9
A ventilation window 47a is formed on the side so that the running wind that cools the radiator 44 flows smoothly rearward. Furthermore, radiator cover 4
A notch 47b is formed at the rear of the engine 7 at a position corresponding to the spark plug 90 of the engine 15.
The position of the spark plug 90 is opened by b, and maintenance of the spark plug 90 can be easily performed from the side of the vehicle body.

In addition, the radiator cover 47 on the right side includes a radiator 44.
A notch 47c is formed in a portion facing the cooling water supply section 52, and cooling water can be easily supplied by removing the cap of the supply section 52 from this notch 47c.

A fuel tank 53 straddles the cross vibe 13 above the engine 15 and is disposed between a pair of left and right tank rails 9 and the seat rail 30, and a fuel supply section 54 is provided in front of the fuel tank 53. The upper part of the fuel tank 53 protrudes slightly upward from the tank rail 9, the front side of the fuel tank 53 is close to the rear part of the box-shaped frame 7, and the rear side extends so as to be close to the upper position of the air cleaner 33.

The seat 5 is attached to the boss 55 provided at the top of the fuel tank 53.
6 and thereby seat 56 .
is attached to cover the entire upper part of the fuel tank 53. A notch 56a is formed in the front side of this seat 56, and the fuel supply portion 5 of the fuel tank 53 is formed in this notch 56a.
4, the front part 56b of the seat 56 extends above the rear part of the box-shaped frame 7, and the rear part 56b of the seat 56 extends above the rear part 5 of the box-shaped frame 7.
6c extends to the rear of the seat rail 30.

The outer surfaces of the seat 56 and the connecting frame 8 and tank rail 9 that constitute the main frame 10 are on the same plane, and the outer surfaces of the connecting frame 8 and tank rail 9 and the radiator cover 47 are in the same plane as described above. Connected by continuous planes. Therefore, since the area from the seat 56 to the radiator cover 47 is on the same plane, the rider can smoothly hold the seat with his/her feet to maintain his/her posture, and also has good foot contact when moving his/her feet forward when turning a corner. Become.

A pair of left and right outer vibes 100 of the inverted front fork 3 are attached to a steering shaft 101 rotatably inserted through the head vibe 2 via an upper bracket 102 and a lower bracket 103.
An inner vibe 104 is extendably inserted into the inner vibe 00. Inner vibe 104 of this inverted front fork 3
The front wheel 4 is rotatably provided on an axle 105 that is pivotally supported.

A disc brake 106 is provided at the lower end of the left inner vibe 104, and its brake caliper 107 straddles a brake disc 108 that rotates together with the front wheel 4.
4 is supported by a bracket 109 provided at the lower end. The brake hose 110 of the disc brake 106 is
It is guided downward from a mask cylinder (not shown) provided on the handle 111 along the front side of the outer vibe 100 and the inner vibe 104 of the inverted front fork 3, bent below the inner vibe 104, and connected to the brake caliper 107. There is. As shown in FIG. 5, this brake hose 110 is secured inside a cover 112.

The center part of this cover 112 is attached to the lower part of the inner vibe 104 with bolts 113, and the rear side is attached to the brake bracket 109 in parallel with bolts 114. The circular part 112a of this cover 112 covers the brake disc 108 from the front side to the outside, and the extension part 112b extending upward covers and protects the inner vibe 104 from the front side to the outside, so that mud adheres to the brake disc 108 and the inner vibe 104 when driving. This prevents scratches from being hit by small stones, etc. Further, a guide hole 112c is formed on the front side of the cover 112 to guide the running wind, so that the brake disc 108 is cooled by the running wind.

The inner vibe 104 on the right side is also provided with a cover 120, and this cover 120 covers the front and side parts of the inch vibe 104 to prevent dirt from adhering to the inner vibe 1054 or damage from hitting pebbles, etc. ing.

The front fender 5 is disposed between the pair of outer vibes 100 of the inverted front fork 3, and the lower bracket 1
03 and extends in the front-rear direction of the inverted front fork 3. As shown in FIGS. 8 and 9, recesses 5a are formed on both sides of the front fender 5, and the outer vibe 100 is attached to the lower bracket 103 with bolts 115 by abutting the recesses 5a. By forming the recess 5a, the front fender 5 extends to the outside of the outer vibe 100 at the front portion 5b of the front fender 5.
A side guide portion 5c is formed extending from the vehicle, and the side guide portion 5c rectifies the traveling wind and causes it to flow rearward along the side and upper portions of the rear portion 5d.

Further, the upper part of the front fender 5 is formed to be lower than the position shown by the dashed line A in FIG. This increases the flow of the traveling wind and improves the cooling efficiency of the radiator 44 and engine 15 disposed at the rear.

The front part 5b of the front fender 5 is formed with an upper guide part 5e that extends upwardly.
A cover member 116 that covers the front side of the head vibrator 2 is connected to the head vibrator 2 .

This cover member 116 has an upper central portion attached to the upper bracket 102 with a bolt 117, and a lower portion engaged with the upper guide portion 5e of the front fender 5. The upper guide portion 5e of the front fender 5 and the cover member 116
Guide holes 118 are formed on the left and right near the connecting portion. As shown in FIG. 6, this guide hole 118 is located above the front fender 5 and at a slightly higher position in front of the radiator 44 and the engine 15, but the guide hole 118 is located at a slightly higher position in front of the front fender 5 and along the upper surface of the front part 5b of the front fender 5. wind is,
It is guided into the vehicle body through the guide hole 118. This running wind is transmitted to the upper surface of the front fender 5 and the lower bracket 10.
3, flows above the lower bracket 103, and further flows toward the radiator 44 and engine 15 to cool them. This running wind exits to the outside of the vehicle body through the air vent window 47a and the notch 47b of the radiator cover 47, and further flows to the rear.

Further, the driving wind flows smoothly from the front portion 5b of the front fender 5 along the upper guide portion 5e, and further flows from the cover member 116 upward and to the left and right.

On this cover member 116, for example, a bib is attached or written. In addition, this cover member 11
6 protects the rider from wind, rain, and even mud. Further, since the upper guide portion 5e of the front fender 5 and the cover member 116 are connected by a continuous surface, it is possible to reduce the accumulation of mud and the like on the front fender 5.

[Effect of the Invention j As described above, the present invention includes a front fender extending in the front-rear direction between a pair of left and right front forks, a cover member that covers the front side of a head vibe is connected to this front fender, and a cover member that covers the front side of a head vibe is connected to this front fender. Since the guide hole is formed in the vicinity of the connecting portion of the members, it is possible to effectively guide the driving wind from the guide hole into the vehicle body along the upper side and side surface of the front fender. Therefore, the cooling air flowing inside the vehicle body increases, and the radiator and engine located behind the front fender can be effectively cooled.

[Brief explanation of drawings]

Figure 1 is a side view of a motorcycle to which this invention is applied;
The figure is a plan view, Figure 3 is a front view, Figure 4 is a side view of the front wheel, Figure 5 is a sectional view taken along the line V-V in Figure 4, Figure 6 is an enlarged side view of the main parts, Figure 7 is The figure is a sectional view taken along ■-■ in Fig. 6, Fig. 8 is a sectional view taken along ■-■ in Fig. 6, and Fig. 9 is a sectional view taken from IX-IX in Fig. 6.
FIG. In the figure, 2 is a head vibe, 3 is an inverted front fork, 4 is a front wheel, 5 is a front fender, 100 is an outer vibe, 102 is an upper bracket, 103 is a lower bracket, 104 is an inner vibe, 16 is a cover member, 18 is a guide It is a hole. 9 681 bC 9 ng

Claims (1)

[Claims] A steering shaft rotatably provided on the head pipe is provided with a pair of left and right front forks via an upper bracket and a lower bracket, and extends in the front-rear direction between the pair of left and right front forks at a position below the lower bracket. A motorcycle equipped with a front fender, characterized in that a cover member that covers the front side of the head pipe is connected to the front fender, and a guide hole is formed in the vicinity of the connection part of the cover member to guide running air inward of the vehicle body. The front fender of a motorcycle.