JPH0745416Y2 - Front fork cover for motorcycles - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a so-called inverted suspension type motorcycle in which an outer tube of a front fork is attached to a vehicle body frame side and an inner tube is attached to an axle side of a front wheel. The present invention relates to a front fork cover for protecting the inner tube.

(Prior Art) Conventionally, in a motorcycle in which an inverted suspension system is adopted for a front fork, for example, as shown in FIG.
The lower end of the cover 52 that covers the front side of the inner tube 51,
The bolts 55 are used to fix the holder 54, which is attached to the axle 53 of the front wheels and supports the inner tube 51. Then, the cover guide 59 is fixed to the lower end portion of the outer tube 58 connected to the steering shaft 56 via the bracket 57 with a bolt 60, and the upper end portion of the cover 52 is loosely fitted to the cover guide 59, so that the cover 52 is secured. I was informed (see Japanese Utility Model Publication No. 59-47587).

(Problems to be Solved by the Invention) In recent years, as shown in FIG. 12, a front fender 62 having left and right overhanging portions 62a is being adopted. That is, the shape of the front fender 62 was normally not provided with the overhanging portion 62a unlike the imaginary line in the past, but recently, in order to prevent the generation of a vortex and reduce the air resistance, it is necessary to consider the hydrodynamics. It has been proposed to provide the overhanging portion 62a as indicated by the solid line. In FIG. 12, 63 is a front wheel hub, and 64 is a disc brake disk for the front wheels. However, in this case, the cover 52 is held in the holder
In the structure attached to 54, it is necessary to provide a gap to some extent so that the upper end of the cover 52 does not come into contact with the front fender 62 when the inner tube 51 enters the outer tube 58 due to the cushioning action of the front fork. In some cases, eddies were generated. . In the conventional structure, the lower end of the cover 52 is the holder.
Since it is fixed to 54, the lower end of the cover 52 and the holder
Mud, dust, etc. may accumulate in the space between the inner tube 51 and 54, and gradually grow to eventually damage the inner tube 51. In addition, the cover 52 increases unsprung weight.

(Means for Solving the Problem) In the present invention, in a motorcycle in which the outer tube 2 of the front fork 1 is attached to the vehicle body frame side and the inner tube 3 is attached to the axle side of the front wheel, the front side of the inner tube 3 is covered. A cover 10 is provided, an upper end portion of the cover 10 is fixed to a lower end portion of the outer tube 2 by a clamp 11, a cover guide 13 is fixed to a holder 6 at a lower end portion of the inner tube 3, and the cover guide 13 is fixed to A front fork cover for a motorcycle characterized in that a free end of a cover (10) is loosely fitted and a cable guide (12) is provided on the clamp (11).

(Operation) Even if the outer tube 2 moves up and down due to the cushioning action of the front fork 1, the cover 10 is fixed to the outer tube 2, so that the upper end of the cover 10 may come into contact with the overhanging portion of the front fender. There is no.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

FIG. 1 is an enlarged side view of an essential part of a motorcycle using a front fork cover according to an embodiment of the present invention, and FIG. 2 is a schematic side view of an essential part of the motorcycle.
As is well known, the outer tube 2 and the inner tube 3 made of, for example, iron that can be inserted into the outer tube 2 for a predetermined length are known. Outer tube 2
Is connected to a steering shaft 4 via a bracket (not shown), and a front fender 5 is attached to the outer tube 2. A holder 6 made of, for example, an aluminum alloy is fitted and fixed to the outer periphery of the lower end portion of the inner tube 3, and the lower end portion of the holder 6 is mounted on an axle 8 that rotatably supports a front wheel 7. A cover 10 made of, for example, a synthetic resin is arranged in front of the inner tube 3, and the cover 10 covers the front side of the inner tube 3 over the entire length in the vertical direction. The upper end of the cover 10 is fixed to the lower end of the outer tube 2 by a metal clamp 11, for example, and a cable guide 12 made of, for example, a metal rod is fixed to the clamp 11 by welding, for example. A boss 6a is integrally formed on the upper end of the holder 6, and a lower end of a protrusion 13a of a cover guide 13 (not shown in FIG. 2) made of, for example, a synthetic resin is bolted to the boss 6a. It is fixed by 14. Cover guide 13
The main body portion 13b (Fig. 10) is cylindrical and the lower end portion of the cover 10 is loosely fitted.

As shown in detail in FIGS. 3 and 4, the cover 10 is composed of a main body portion 10a and a flange portion 10b. The main body portion 10a is a plate-like member having a slightly uneven surface as shown in FIG. The part is bent diagonally forward. The collar portion 10b has an arc shape as shown in FIG. 6, and a protrusion portion 10c protruding outward in the radial direction is formed at the upper end portion.

As shown in detail in FIG. 7, the cover 10 has a band-shaped clamp 11 fitted on the outer periphery of the collar portion 10b with the inner periphery of the collar portion 10b abutting against the front portion of the outer periphery of the lower end portion of the outer tube 2. Both ends of the clamp 11 are fastened by bolts 15. That is, the collar portion 10b is clamped and fixed to the outer tube 2 by the clamp 11, and the lower surface of the protruding portion 10c closely faces the upper end surface of the clamp 11.

As shown in detail in FIGS. 8 and 9, the cable guide 12 is bent into a substantially loop shape, and one end 12a bent downward is fixed to the clamp 11. The cable guide 12 guides a plurality of cables 16 (only one is shown) passing near the front fork 1.

As shown in detail in FIG. 10, the main body portion 13b of the cover guide 13 has a substantially rectangular cross-sectional shape, and the main body portion 10a of the cover 10 is
Penetrates the main body portion 13b of the cover guide 13 in the vertical direction. A predetermined clearance is provided between the main body 13b and the main body 10a.

Next, the operation will be described. Even if the preceding vehicle jumps up gravel or mud during traveling, the front side of the inner tube 3 is covered by the cover 10, so the gravel and mud do not collide with the inner tube 3 and the inner tube 3 does not collide. Is well protected by the cover 10. Front fork 1
Even if the outer tube 2 moves up and down due to the cushioning action, the cover 10 is fixed to the outer tube 2, so that the upper end of the cover 10 does not come into contact with the overhanging portion 5a of the front fender 5. Further, since the cover 10 is fixed to the outer tube 2, it is possible that the inner tube 3 is damaged by the accumulation of mud and dust between the lower end of the cover 10 and the holder 6 and the growth thereof. Absent. Further, since the cover 10 is fixed to the outer tube 2, the unsprung weight can be reduced as compared with the case where the cover 10 is fixed to the holder 6. Further, as in the present embodiment, if the protrusion 10c is provided on the collar 10b of the cover 10,
It is possible to favorably prevent the clamp 11 from coming off. If the cover guide 13 is provided as in the present embodiment, when the cover 10 moves up and down together with the outer tube 2 due to the cushioning action of the front fork 1, the cover 10 is guided by the cover guide 13 and satisfactorily. The rotation is stopped. If the cable guide 12 is attached to the clamp 11 as in the present embodiment, a space for installing the cable guide 12 can be secured separately, or a device for attaching the cable guide 12 to a place where the attachment is difficult is required. There is no, and it is rational. Even if the outer tube 2 is sunk as shown by the phantom line in FIG. 1 due to the cushioning action of the front fork 1, the lower end of the cover 10 is almost at the same height as the axle 8 and the cover 10 contacts the road surface. There is no such thing.

(Other Embodiment) In the above embodiment, the cover guide 13 for guiding the cover 10 is provided, but the present invention is not necessarily limited to such a configuration, and the rigidity of the cover 10 is ensured. The cover guide 13 may be omitted.

Further, in the above embodiment, the cover 10 is fixed to the outer tube 2 by using the band-shaped clamp 11, but the present invention is not necessarily limited to such a configuration, and the cover 10 is fixed to the outer tube 2. Various other means may be used to do this.

(Effect of the Invention) According to the present invention as described above, since the upper end of the cover 10 is fixed to the lower end of the outer tube 2, the cushion effect of the front fork 1 causes the outer tube 2 to move up and down. The upper end of the cover 10 does not come into contact with the overhanging portion 5a of the front fender 5. Since the cover 10 is fixed to the outer tube 2, the cover 10
There is no possibility that mud, dust, or the like will be accumulated between the lower end of the inner tube 3 and the holder 6 of the inner tube 3. Also cover 10
Is fixed to the outer tube, so compared to the case where the cover 10 is fixed to the holder 6 of the inner tube 3,
The unsprung weight can be reduced.

Further, since the cover 10 is provided downward, there is no obstruction below the cover 10, the required stroke amount of the front fork 1 can be secured, and there is no risk of interference with other members. Further, it is not necessary to separately secure a space for installing the cable guide or to install the cable guide in a place where it is difficult to install, and further, there is an effect of reducing the number of parts.

[Brief description of drawings]

FIG. 1 is an enlarged side view of an essential part of a motorcycle using a front fork cover according to an embodiment of the present invention, FIG. 2 is a schematic side view of an essential part of the motorcycle, and FIG. 3 is a plan view of the cover. 4 is the same side view, and FIG. 5 is VV in FIG.
6 is a sectional view taken along line VI-VI in FIG. 4, FIG. 7 is a sectional view taken along line VII-VII in FIG. 1, and FIG.
Figure is a side view near the cable guide, Figure 9 is a sectional view taken along the line IX-IX in Figure 8, and Figure 10 is XX in Figure 1.
FIG. 11 is a sectional view taken in the direction of the arrow, FIG. 11 is an enlarged side view of a main part of a motorcycle which employs a conventional front fork cover, and FIG. 12 is an explanatory view of a recent positional relationship between a front fender and a cover. 1 ... Front fork, 2 ... Outer tube, 3
…… Inner tube, 10 …… Cover

Claims (1)

[Scope of utility model registration request] 1. A motorcycle in which an outer tube (2) of a front fork (1) is attached to a vehicle body frame side and an inner tube (3) is attached to an axle side of a front wheel,
Cover (10) for covering the front side of the inner tube (3)
The upper end of the cover (10) is fixed to the lower end of the outer tube (2) by a clamp (11), and the cover guide (13) is attached to the holder (6) at the lower end of the inner tube (3). And the free end of the cover (10) is loosely fitted to the cover guide (13), and the clamp (1
A front fork cover for a motorcycle, characterized in that a cable guide (12) is provided in 1).