JPH11208559A - Frame of motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily hold a flexible long-sized object such as an electric wiring and a hose in a motorcycle without using an exclusive clamp. SOLUTION: A main frame 9 extending to a body central part after passing the upper part of an engine from a steering head is formed of a hollow body consisting of two frame half bodies 20 and 21 split on a split surface extending in the longitudinal direction, and each flange 22 is formed in both side ends of at least one of the frame half bodies 20 and 21, a clamp 24 holding a flexible long-sized object 23 is attached to this flange 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called monocoque frame structure for a motorcycle.

[0002]

2. Description of the Related Art Conventionally, a main frame extending from a steering head of a motorcycle to a central portion of the vehicle through a position above an engine to a center portion of the vehicle includes electric meters such as a speedometer, ignition lamps and a fuel meter, and a radiator thermostat and reserve. A hose between the tanks, a hose between the breather of the fuel tank and the canister, and the like are provided. When a monocoque frame (see, for example, Japanese Utility Model Laid-Open No. 03-092280) formed of a single thin hollow body curved backward and downward is used as the main frame, as shown in FIG. Since the main frame 90 has no rectangular shape, a flexible long object (hereinafter, simply referred to as a flexible long object) such as the electric wiring and the hose is formed by using a special clamp (not shown) for exclusive use. Since the clamp is held, the operation of attaching the clamp is complicated.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such prior art, and has a special purpose by forming a holding portion for a flexible long object at the time of forming a main frame. An object of the present invention is to provide a motorcycle frame that can easily hold the flexible long object without using a clamp.

[0004]

A motorcycle frame according to the present invention comprises a main frame extending from a steering head to a central portion of a vehicle body above an engine and divided into two half-frames divided by a longitudinally extending dividing surface. A structure in which a hollow body made of a body is formed, a flange is formed at a side end of at least one frame half, and a clamp for holding a flexible elongated object such as an electric wiring or a hose is attached to the flange. And

[0005] With this configuration, since the flange is formed at the side end of at least one frame half, the flexible elongated object can be easily held on the flange without using a dedicated clamp. In addition, since the width of the main frame (up and down width or left and right width) is increased by the amount of the flange, the bending strength against the force applied in the direction in which the width is increased is increased.

In a preferred embodiment of the present invention, the two frame halves forming the main frame are made of plate members facing up and down, and both side ends of the lower frame half are joined to the inside of both sides of the upper frame half. Then, both sides of the upper frame half extend downward from the joint portion to form the flange. Therefore, the bending strength of the main frame with respect to the vertical force is increased, so that a frame suitable for a large motorcycle can be obtained.

[0007] In a preferred embodiment of the present invention, the flexible long object is held by the clamp on the inner surface of the downwardly extending flange. Therefore, the flexible long object is protected by the flange.

In another preferred embodiment of the present invention, a clamp hole is provided in the flange, and the clamp is attached to the clamp hole. With this configuration, the flexible long object can be supported using the existing clamp.

[0009] In another preferred embodiment of the present invention, there is further provided a decorative cover for covering an upper surface and side surfaces of the main frame, and the decorative cover is attached to the flange by a fixture. With this configuration, the flange that supports the flexible long object can be used for attaching the decorative cover.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the motorcycle has a front wheel 4 attached to a front fork 3 pivotally supported by a steering head 2 at a front end of a frame 1, and is pivotally supported by a swing arm bracket 5 at a lower center portion of the frame 1 by a pivot 6. A rear wheel 8 is mounted on a swing arm 7 and the rear wheel 8 is driven by an engine E mounted on a lower part of a main frame 9 connected to the steering head 2: a handle 10 fixed to an upper end of the front fork 3. It is configured to steer.

The swing arm 7 and the frame rear portion 19
Between them, a rear suspension 11 for supporting rear wheel load is mounted, and an operator's seat 12 is mounted on a rear portion 19 of the frame 1. The front part of the vehicle body is covered by a cowling 13, and the upper surface and side surfaces of the main frame 9 are covered by a decorative cover 14 attached via a cushion material 50 (FIG. 4). A fuel tank 15 is mounted on the frame 1 below the seat 12.

FIG. 2 is a perspective view showing the structure of the frame 1 in FIG. As shown in FIGS. 1 and 2, the frame 1 includes the steering head 2, the main frame 9 extending from the steering head 2 above the engine E to the center of the vehicle body, and the rear of the main frame 9. The box member 18 connected to the end, the frame rear portion 19 extending rearward from the center of the vehicle body, and the left and right swing arm brackets 5 fixed to the box member 18 are integrated by welding or the like. ing. The frame 1 can be configured by integrally assembling a press-formed product or a pipe material of an aluminum-based alloy or an iron-based alloy by welding or fastening with bolts or the like.

As shown in FIG. 1, the main frame 9 has a curved shape in which the rear half portion after passing above the engine E is bent downward, and as shown in FIG. The two frame halves 2 made of a plate material divided by a divided surface extending in the longitudinal direction along the front and rear are formed by a thin hollow body (monocoque structure) having
0 and 21 are joined together by welding.
These two frame halves 20 and 21 are made of a vertically opposed plate material, and are formed of a thin hollow body formed by joining both side ends of the lower frame half 21 to the inside of both sides of the upper frame half 20. Both sides of the upper frame half 20 extend downward from the joint J to form a flange 22. A plurality of clamp holes 25 and a plurality of mounting holes 27 are alternately formed in the flanges 22 on both sides at predetermined intervals, respectively, as shown in FIG. Attach the clamp 24 for holding,
An attachment 26 for fixing the decorative cover 14 is attached to the attachment hole 27.

As shown in FIG. 5, the clamp 24 is mounted on the flange 22 of the main frame 9 by the flexible elongated object 2.
The two legs 2 are made of an elastic material such as synthetic resin or metal, and have a bulge 28 at the tip.
9 are connected to the open end of the ring portion 30 in parallel with each other at a slight interval. Ring part 3 of this clamp 24
After the flexible long object 23 is inserted through the
Is inserted into the clamp hole 25 of the main frame 9, the leg portion 29 is elastically deformed, and the swelling portion 28 at the tip of the leg portion 29 passes through the clamp hole 25, returns by elastic force, and is locked in the clamp hole 25. The flexible long object 23 is held on the flange 22 of the main frame 9.

As shown in FIG. 6, the attachment 26 comprises a bolt 31, a rubber crimping member 32,
2 and a nut 33 fixed to the inner end. The crimping member 32 is inserted through the mounting hole 27 and the decorative cover 14 is
The bolt 31 is inserted from the outside of the decorative cover 14 into the mounting hole 34 provided in the
By tightening 1, the nut 33 advances outward to form a bulging portion 35, and the flange 22 is pressed between the large-diameter portion 36 at the outer end of the crimping member 32 and the bulging portion 35. Thereby, the decorative cover 14 is attached to the flange 22.

The main frame 9 made of a thin hollow body
2 is used as an air cleaner case for the intake air of the engine, as shown in FIG. 2, and a suction duct port 47 formed at the front thereof has a rear end of the suction duct 38 for introducing air shown in FIG. A cleaner element 39 is provided behind the suction duct port 47, and a down-draft type intake passage 42 is connected via a carburetor 41 to an outlet 40 formed further behind. The front end of the suction duct 38 is open to the front of the cowling 13 so that the ram pressure during traveling can be used for air suction.

The box member 18 is, as shown in FIG.
It is formed of a horizontally elongated rectangular parallelepiped hollow body, and its left and right end faces (end faces on the near side and on the other side in the drawing) are open. The internal space includes a battery, an antilock brake unit, an oil tank, and a cooling water tank. One or more in-vehicle equipment such as relatively heavy (not shown)
The cover member 43 is detachably fixed to the opening end faces on both sides thereof by fastening means such as bolts. The box member 18 and the swing arm bracket 5 fixed thereto are attached to the frame rear portion 19.
Has been fixed.

In the above configuration, the flexible long object 23 such as the battery housed in the box member 18 of FIG. 2, the electric wiring of the fuel gauge of the fuel tank 15, the hose of the radiator 46, etc.
After passing through the clamp 24 of FIG.
The flexible long object 23 is supported on the main frame 9 by being attached to the clamp hole 25 provided in the flange 22 of the above. Here, since the flanges 22 are formed by the side ends of the frame halves 20 and 21 forming the main frame 9, the flanges 22 project from the main frame 9.
In addition, the flexible elongated object 23 can be easily held by using the clamp 24 having a simple shape, and a dedicated clamp is not required.

Further, since the vertical width of the main frame 9 shown in FIG. 4 is increased by the width of the flange 22, the bending strength of the main frame 9 against the force applied in the direction in which the width is increased, that is, the vertical direction is increased. Therefore, it is particularly suitable for a large motorcycle having a large vertical load on the main frame 9 due to its large weight. Further, since the flexible long object 23 is held by the clamp 24 on the inner surface side of the flange 22 extending downward, it is not exposed to the outside and is protected.

Further, since a clamp hole 25 is provided in the flange 22 and the clamp 24 is inserted and attached to the clamp hole 25, an existing simple plug-in type structure can be used as the clamp 24. No special clamp is required. Further, since the decorative cover 14 is attached to the flange 22 by the fixture 26, the flange 22 supporting the flexible elongated object 23 is
4 is also used, and a dedicated flange for attaching the decorative cover is not required, and the structure is simplified.

In the above embodiment, the flange 22 formed on the main frame 9 has been described as an example in which both sides of the upper frame half 20 extend below the joint portion of the lower frame half 21. As shown in FIG. 7, both side portions of the upper frame half 20 are bent outward to protrude, and both side ends of the lower frame half 21 are joined to the protruding portion so that the flanges 22 are joined. It may be formed.

In the above-described embodiment, the example in which the two frame halves 20, 21 constituting the main frame 9 are vertically opposed has been described. However, as shown in FIG. A substantially F-shaped frame half 48, 49 may be a hollow body joined to each other. Further, the cross-sectional shape of the main frame 9 is not limited to a square, but may be various shapes such as a trapezoid, another polygon, and a semicircle.

In the above-described embodiment, an example has been described in which the flanges 22 formed on the main frame 9 are provided on both side ends of the upper frame half 20, but only one side end may be provided. Is provided over the entire length of the side end, but a flange may be formed only on a part of the side end.

[0024]

As described above, according to the present invention,
The main frame is composed of two frame halves divided by a dividing plane extending in the front-rear direction, and a flange is formed at a side end of at least one of the frame halves, so that the flange protrudes from the main frame. Therefore, it is possible to easily hold a flexible long object by using a clamp having a simple shape on this protruding flange,
No special clamp is required. Further, since the width of the main frame (upper / lower width or left / right width) is increased by the amount of the flange, the bending strength of the main frame with respect to the force applied in the direction in which the width is increased increases.

[Brief description of the drawings]

FIG. 1 is a left side view showing a motorcycle including a frame according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the frame of FIG. 1;

FIG. 3 is a sectional view of the main frame taken along line II in FIG. 2;

FIG. 4 is a cross-sectional view of the motorcycle shown in FIG. 1 in the vicinity of a main frame.

FIG. 5 is an enlarged sectional view of the vicinity of the clamp of FIG. 4;

FIG. 6 is an enlarged end view of the vicinity of the attachment shown in FIG. 4;

FIG. 7 is a cross-sectional view illustrating a main frame according to another embodiment of the present invention.

FIG. 8 is a sectional view showing a main frame according to still another embodiment of the present invention.

FIG. 9 is a sectional view showing a conventional main frame.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Steering head, 9 ... Main frame, 14 ... Makeup cover, 20 ... Upper frame half, 2
DESCRIPTION OF SYMBOLS 1 ... Lower frame half, 22 ... Flange, 23 ... Flexible long object, 24 ... Clamp, 25 ... Clamp hole, 26 ... Fixture, E ... Engine.

Claims (5)

[Claims] A main frame extending from a steering head to a center portion of a vehicle body above an engine is formed of a hollow body composed of two frame halves divided by a division surface extending in a longitudinal direction. A motorcycle frame in which a flange is formed at a side end portion of a frame half, and a clamp for holding a flexible long object is attached to the flange. 2. The two frame halves according to claim 1, wherein the two frame halves are made of plate members facing up and down, and both side ends of the lower frame half are joined to the inside of both sides of the upper frame half. A motorcycle frame in which both side portions of an upper frame half extend downward to form the flange. 3. The motorcycle frame according to claim 2, wherein the flexible long object is held on the inner side of the flange by the clamp. 4. The motorcycle frame according to claim 1, wherein a clamp hole is provided in the flange, and the clamp is attached to the clamp hole. 5. The motorcycle frame according to claim 1, further comprising a decorative cover for covering an upper surface and a side surface of the main frame, wherein the decorative cover is attached to the flange by a fixture. .