JPH07121713B2 - Brake protection structure for motorcycles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a brake protection structure for a motorcycle, which protects a brake of a front wheel shaft center portion from muddy water by a protection member disposed on the side of the front wheel. Is.

[Conventional technology]

Conventionally, when a wheel or a member that supports the wheel in a motorcycle such as a scooter is protected from muddy water by a protective member disposed on the side of the wheel, the wheel is disclosed as Japanese Patent Application No. 59-20784. It is common to use a cap. In this, a wheel cap is formed in a shape that covers a support portion formed at the tip of a front fork and an end portion of an axle supported by the support portion from a side surface, and is attached to the support portion of the front fork.

[Problems to be Solved by the Invention]

However, in such a conventional wheel cap, the brake device provided on the wheel has a small shape and is exposed to the outside. Therefore, muddy water splashed up by the wheel may be applied to the brake device. As a result, there is a problem in that not only is mud attached to the invading places such as the connection between the wire and the cam lever and the gap between the cam lever and the brake side plate, which impairs the appearance, but also the removal thereof is troublesome. It was Therefore, in order to solve this, it is conceivable to enlarge the wheel cap to cover the entire brake device, but this makes it difficult for the friction heat of the brake device to be dissipated and the temperature of the brake device rises. Occurs.

[Means for Solving the Problems]

The present invention has been made in view of the above circumstances, and provides a protective structure for a brake that can protect the brake device without increasing the temperature.

A brake protection structure for a motorcycle according to the present invention includes a front wheel including a tire and a wheel having a circumferentially continuous surface rotatably supported by a front wheel support member, and a brake device is disposed near an axle of the front wheel. For motorcycles,
Protecting the front wheel support member, which is arranged on the left and right outside of the wheel and extends radially outward from the center portion corresponding to the axle in a side view of the vehicle body, and the outer edge of which is close to the circumferential connection surface of the wheel. The members are detachably attached from the outside, the protection members are provided in a pair on the left and right to cover the front wheel support member, the wheel, and the brake device from the outside, and the front of the center of the protection member is expanded toward the outside of the vehicle body. A convex portion having an opening for an air inlet is provided on the delivery front surface, and an air outlet is provided on the rear side of the protective member.

[Action]

In the present invention, the protective member prevents muddy water from splashing on the brake device and the like, and the traveling wind is efficiently circulated in the protective member through the air inlet and the air outlet, so that the traveling wind heats the brake device. Dissipate.

〔Example〕

 An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view showing a brake protection structure in a motorcycle according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 4 is a side view showing a scooter in which a brake protection structure according to the present invention is implemented, and FIG. 5 is a front view showing an axle.

In these figures, the reference numeral 1 indicates a scooter, which is provided between the steering handlebar 2 and the seat 3 with a low-floor, substantially plate-shaped footrest 4. Reference numeral 5 denotes a frame that extends in the front-rear direction, and includes a steering shaft tube 5a that rotatably supports the front fork 6, a front frame 5b that extends downward from the steering shaft tube 5a, and a front frame 5b. It is composed of a rear frame 5c which is branched left and right from the partial frame 5b and pivotally supports a unit swing type engine 8 supporting the rear wheels 7.

Reference numeral 10 is a front wheel which is supported via a link 11 and a damper 12 which are pivotally attached to the lower end of the front fork 6. Both ends of the front wheel 10 are rotatably supported on an axle 13 extending in the vehicle width direction. The axle 13 is fixed to the link 11 by nuts 18 which are threadedly attached to both ends of the axle 11 which are horizontally provided between the links 11. Where front fork 6, link 11,
A member such as the axle 13 constitutes a front wheel support member for supporting the front wheel 10.

The front wheel 10 is composed of a tire 14 and a wheel 15 for holding the tire 14, and the wheel 15 has an outer rim 15a, a central hub 15b supported on the axle 13 by a bearing 16, and a spoke 15c connecting them. It consists of The outer surface of the rim 15a is a circumferentially continuous surface of the wheel according to the present invention. A brake drum 17 is formed integrally with the hub 15b. Inside the brake drum 17, a shoe 22 having a lining 20 on the surface and rubbing the inner surface of the brake drum 17 when expanded by a brake cam 21 is arranged. Reference numeral 25 is a brake side plate provided on the open end side of the brake drum 17 and fixed on the axle 13. The shoe 22 and the brake cam 21 are mounted on the brake side plate 25. The shoe 22 is an anchor pin that supports this.
It is attached to the brake side plate 25 via 26. The brake cam 21 is connected to the brake lever of the steering handle 2 via a cam lever 27 and a wire (not shown).
Reference numeral 28 is a spacer for making the supporting position of the axle shaft 13 symmetrical.

Reference numeral 30 denotes a resin protective member that covers the side surface of the wheel 15 of the front wheel 10 from one side, and in the embodiment, covers the wheel side surface and the front fork tip portion from both outsides of the front fork 6. More specifically, the protection member 30 faces the rim 15a so that the wheel 15 and the brake device can be covered from the outside except for a part of the front fork 6 serving as a front wheel support member and the tire 14 that splashes muddy water. It is formed in a substantially hemispherical shell shape having a peripheral edge portion that bulges laterally toward the rim. In other words, the protection member 30 is disposed on the left and right outer sides of the wheel 15 and extends radially outward from the central portion corresponding to the axle 13 in the side view of the vehicle body shown in FIG. The structure is close to the outer surface as the circumferentially continuous surface.

The protection members 30 are formed in a pair of left and right, and the front wheels 10
Nuts 31, 31 are fixedly attached to the left and right ends of the axle 13 that serves as a support side of the shaft so as not to rotate. That is,
By loosening and removing the nut 31, the protective member 30 can be easily removed to the side of the vehicle body.

The front fork 6 is provided above the peripheral edge of the protection member 30.
The insertion part 32 through which is inserted is cut out, and the cam lever is
An insertion portion 33 through which a wire for operating the 27 is inserted is cut out.

Reference numeral 35 is an air inlet for allowing air to flow into the protective member 30. The air inlet port 35 of the protective member 30 is formed by projecting a portion extending in the horizontal direction and forward from the central portion of the protective member through which the axle 13 penetrates outwardly of the vehicle body and in a fan shape in side view. It is provided on the front side and opens toward the front. This protruding portion constitutes the convex portion according to the present invention. A plurality of guide plates 36 for guiding the air flow in the horizontal direction are provided at the air inlet 35 at equal intervals.

37 is an air outlet for letting out the air in the protective member 30. This air outlet 37 is provided on the rear side of the protective member 30 by projecting a portion extending in the horizontal direction and rearward from the central portion of the protective member through which the axle 13 penetrates toward the outer side of the vehicle body in a stepwise manner. It is provided and opened rearward. The step portion 37a extends in the circumferential direction of the protection member 30. Therefore, the flow of air that rotates with the rotation of the wheel 15 is not hindered, and the air is guided to the outside along the flow.

In the wheel protection structure configured as described above, the protection member 30 covers a part of the front fork 6, substantially the entire side surfaces of the wheel 15 excluding the tires 14 of the front wheels 10 and the braking device from the outside. Therefore, the muddy water splashed by the front wheel 10 can be prevented from being applied to the wheel 15 and the brake device. More specifically, the peripheral edge of the protective member 30 is the rim.
Since it extends so as to be close to the outer side surface of the tire 15a, a wall is formed between the periphery of the brake device and the outer peripheral side of the tire 14, so that muddy water splashed up by the tire 14 and the like can be prevented. It is difficult to reach the brake device side because it is blocked by this wall. Even if mud adheres to the outer surface of the protective member 30, it can be removed very easily because the surface has a smooth shape.

Further, since the protective member 30 is provided with the air inlet port 35 and the air outlet port 37, when the scooter 1 travels, traveling wind is introduced from the air inlet port 35 into the protective member 30, and the air outlet port 37.
Can be drained from. Therefore, traveling wind having a low temperature can be circulated in the protection member 30, and the traveling wind can dissipate and cool the heat of the brake device.

Here, since the protection member 30 is formed in a substantially hemispherical shell shape bulging laterally of the front wheel 10 and has a smooth surface inclined with respect to the traveling direction, the air inlet 35 is made to face the traveling wind. Therefore, the traveling wind can efficiently flow into the protection member 30.

On the other hand, since a negative pressure is generated near the air outlet 37 by the traveling wind that flows along the surface of the protective member, the heated air in the protective member can be efficiently sucked out. As a result, the above-described cooling of the braking device is performed well.

In the above embodiment, the example in which the protective member 30 is fixedly attached to the end of the axle 13 has been described, but the present invention is not limited to this, and the protective member 30 is attached to the tip of the front fork 6 or the link 11. May be.

〔The invention's effect〕

As described above, the brake protection structure in the motorcycle according to the present invention has a front wheel composed of a tire and a wheel having a circumferential continuous surface rotatably supported by a front wheel support member, and a brake device near the axle of the front wheel. In the motorcycle in which the front wheel supporting member is disposed on the left and right outer sides of the wheel and extends radially outward from the center portion corresponding to the axle in a side view of the vehicle body, the outer edge of the wheel is a peripheral portion of the wheel. A protective member having a structure close to the direction continuous surface is detachably attached from the outer side. The protective member is provided in a pair of left and right to cover the front wheel support member, the wheel and the brake device from the outer side, and the central portion of the protective member. The front of the vehicle has a convex part that bulges outward from the vehicle body and has an air inlet on the front side, and an air outlet on the rear side of the protective member. So that the wall is formed by the protective member in proximity to the circumferential direction continuous surface of the wheel between the periphery and the tire location.

Therefore, it is possible to prevent the muddy water splashed up by the tire from being blocked by the wall and applied to the brake device and the like.

Further, by adopting a configuration in which a convex portion that bulges toward the outside of the vehicle body in front of the central portion of the protective member and has an air inlet opening is provided on the front surface, and an air outlet is provided on the rear side,
Since a large amount of traveling wind can be made to flow into the inside of the protection member with a minimum opening, the brake device can be effectively cooled while suppressing intrusion of mud or the like as much as possible.

Further, by providing a pair of right and left protective members and detachably attaching to the front wheel support member from the outside, each of the protective members can be downsized and easily formed, and can be easily detached and required. It is very easy to clean because it can be attached and detached only on the free side.

[Brief description of drawings]

FIG. 1 is a side view showing a wheel protection structure in a motorcycle according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 4 is a side view showing a scooter in which a wheel protection structure according to the present invention is implemented,
FIG. 5 is a front view showing the axle. 6 ... front fork, 10 ... front wheel, 13 ... axle, 15
…… Wheels, 30 …… Protective members, 31 …… Nuts, 35 ……
Air inlet, 37 ... Air outlet.

Claims (1)

[Claims] 1. A motorcycle in which a front wheel composed of a tire and a wheel having a circumferential continuous surface is rotatably supported by a front wheel support member, and a brake device is arranged near the axle of the front wheel. A protection member that is arranged on the left and right outside of the wheel and extends radially outward from the center portion corresponding to the axle in a side view of the vehicle body, and the outer edge is close to the circumferential continuous surface of the wheel. From the outer side of the front wheel support member, the wheel and the brake device, a pair of left and right protection members are provided to cover the front wheel support member, the wheel and the brake device from the outside. A structure for protecting a brake in a motorcycle, wherein a convex portion having an open air inlet is provided, and an air outlet is provided on the rear side of the protective member.