JPS6027820Y2 - Connection tube in motorcycles - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a connecting tube for a motorcycle.

This type of connecting tube is, for example, a connecting tube that connects an air cleaner and a resonance chamber, and as shown in the perspective view of FIG. 1, has a substantially truncated conical shape and is called a cone tube.

Both ends of the cone tube 26 fit into the air cleaner and resonance chamber, respectively, and are further tightened with a connecting band 27 and screws 28 to prevent them from coming off.

Here, the connecting band 27 has tightening portions 27A at both ends.
and a band portion 27B, but the tightening portion 27A requires a flange to provide bending strength, so the width of the tightening portion 27A becomes larger than the width of the band portion 27B. There is.

In order to maintain a constant tightening position by the connecting band 27, a guide groove 29 with a constant groove width is formed at both ends of the cone tube 26, and the width of this guide groove is d.
3 is the width d□ of the tightening portion 27A of the connecting band 27
Since it has to be approximately equal to and wider than that, it becomes considerably wider than the width of the band portion 27B.

For this reason, when tightening, the center of the band axis tends to slip more easily than the axis of the cone tube, so it takes time and effort to assemble it so that it is in a predetermined position.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a connecting tube in which a connecting band is always kept in a predetermined position.

The connecting tube according to the present invention has a guide groove consisting of a wide groove width portion corresponding to the width of the tightening portion of the connecting band.

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

FIG. 2 is a schematic side view showing a power generation device for a motorcycle according to the present invention.

In the figure, 1 is a head pipe, 2 is a left and right main pipe, 3 is a left and right lower main pipe, and 4 is a left and right rear pipe, and these pipes constitute the frame of the vehicle body.

The lower main pipe 3 has a rectangular shape, and both ends thereof are connected to the rear pipe 4 by a gusset 5.

At the bottom of the lower main pipe, an engine 8 with cylinders 6 and 7 arranged in a V-shape is mounted.

9.10 is a carburetor that supplies mixed gas to each cylinder 6.7, and is connected to a resonance chamber (expansion chamber) 11.

12 is an air cleaner for competitively supplying air to the resonance chamber 11, which includes the aforementioned head pipe 1, left and right upper main pipes 2, and left and right lower main pipes 3.
It is located in a space surrounded by

Fuel tank 1 carried on left and right upper main pipes 2
3 is rotatably supported by a support member 14 at its rear end with respect to the vehicle body.

An auxiliary tank 16 is attached to this fuel tank 13 via a flexible tube 15.

3 is a side sectional view showing a part of the air cleaner in FIG. 2, and FIG. 4 is a plan view thereof including a partial section.

In Figures 3 and 4, the left and right lower main pipes 3
A pair of cross pipes 17 and 18 are installed at a predetermined distance from each other, and the cross pipe 17 has a recess formed in the longitudinal direction on its upper surface.

The air cleaner 12 uses a pair of cross pipes 17 and 18 as stays for installation, and has a pair of hook members 19 and 20 at the bottom that can be secured to the cross bar and Eve 17 for installation. 18 is provided with a fixing part 21 to be fixed by fixing means such as a screw.

The intake pipe 23 of the air cleaner 12 is located behind the head pipe 1 and is bent as shown in the figure, with its intake port facing downward.

In the vicinity of the inlet of the air cleaner 12, a rectifying member 24, which is approximately square-shaped when viewed from the axial direction, is provided which forms a pair of slopes spaced apart from each other from the suction port toward the element 25. Air introduced through the intake pipe 23 is distributed almost evenly in order to effectively utilize the entirety of a circular element (filter paper) 25 provided near the rear of the flow regulating member 24.

The air that has passed through the element 25 is supplied from the outlet of the air cleaner 12 through the cone tube 2 to the resonance chamber 11 described above.

As shown in a perspective view in FIG. 5, the cone tube 26 has a substantially truncated cone shape, and both ends fit into the air cleaner 12 and the resonance chamber 11, respectively, and are connected to each other so as not to separate. Tightening is fixed by band 27 and screw 28.

Guide grooves 29 are formed at both ends of the cone tube 26 in order to keep the tightening position of the connecting band 27 constant.

This guide groove 29 has a groove width approximately equal to or wider than the width d of the tightening portion 27A of the connecting band 27.
9A and a portion 2 having a groove width approximately equal to the width of the band portion 27B.
9B, and the connecting band 27 is tightened with the axial center of the connecting band 27 always aligned with the axis of the cone tube.

In this way, by providing the guide groove that serves as a guide for the connecting band with a groove width that is approximately equal to the width of the band portion of the connecting band, the connecting band can always be held in a predetermined position and securely tightened. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example of a cone tube, Fig. 2 is a schematic side view showing a power generation device for a motorcycle according to the present invention, and Fig. 3 is a side sectional view showing a part of the air cleaner in Fig. 2. 4 is a plan view including a partial cross section thereof, and FIG. 5 is a perspective view showing the cone tube according to the present invention. Explanation of symbols of main parts, 1...Head pipe,
2... Upper main pipe, 3... Lower main pipe, 6.7... Cylinder 8...
Song engine, 11...Resonance chamber-1
2...Air cleaner, 13...Fuel tank, 17.18...Cross pipe, 19,
20... Hook member, 21... Fixing part, 24... Rectifying member, 25... Curved element,
26... Cone tube, 27... Connecting hand.

Claims (1)

[Scope of utility model registration request] The connecting tube is fastened and fixed by a connecting band consisting of a tightening part at both ends and a band part whose width is smaller than the tightening part, and the connecting band is fixed at the tightening position by the connecting band. A connecting tube for a motorcycle, characterized in that it has a guide groove consisting of a wide groove width portion corresponding to the width of a tightening portion and a narrow groove width portion approximately equal to the width of a band portion.