JPH04339086A - Air exhaust pipe heat insulating device for motorcycle - Google Patents

Abstract

PURPOSE:To provide an air exhaust pipe heat insulating device for a motorcycle which has an excellent heat insulating property and also has a fender function. CONSTITUTION:In an air exhaust pipe heat insulating device for a motorcycle in the present invention, a heat insulating plate 13 which extends in the backward direction of a vehicle body is arranged in the upper position of an air exhaust manifold 10 to which the rear edge of an air exhaust pipe 9 is connected, and the heat insulating plate 13 is constituted as a part of a rear fender 14 by connecting the rear edge part 13c of the heat insulating plate 13 to the front edge part of the rear fender 14.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe heat shielding device for a motorcycle.

0002

[Prior Art] Conventionally, a kick-start motorcycle is equipped with a small battery 51 as shown in FIG. There is a relatively large gap between the battery 51 and the battery 51. Furthermore, in a motorcycle equipped with a small displacement engine, the amount of heat generated from the exhaust manifold 53 is also small, so there is no risk of heat damage to the battery 51 located above the exhaust manifold 53 or the resin rear fender 54. . In the figure, reference numeral 55 indicates a pair of left and right mufflers extending from the exhaust manifold 53 toward the rear of the vehicle body.

0003

[Problems to be Solved by the Invention] However, in a cell-start motorcycle, a large battery 51 is installed,
In addition, since the exhaust manifold 53 also becomes larger, the gap l between it and the battery 51 disposed above becomes narrower.
There is a problem in that the radiant heat from the exhaust manifold 53 is easily transmitted to the battery 51. Furthermore, in a motorcycle equipped with a large displacement engine, the amount of heat generated from the exhaust manifold 53 is also large, which has the disadvantage that the battery 51 and the resin rear fender 54 are subject to heat damage. .

The present invention has been made in view of the above-mentioned circumstances, and its object is to provide an exhaust pipe heat shielding device for a motorcycle that has excellent heat shielding properties and has a fender function.

[0005]

[Means for Solving the Problems] In order to solve the problems of the prior art described above, the present invention provides an exhaust pipe heat shield plate for a motorcycle equipped with an exhaust manifold to which the rear end of the exhaust pipe is connected. A heat shield plate extending toward the rear of the vehicle body is disposed above the exhaust manifold, and the rear end of the heat shield plate is connected to the front end of the rear fender, so that the heat shield plate is configured as a part of the rear fender. ing.

[0006]

[Operation] In the exhaust pipe heat shielding device for a motorcycle according to the present invention, since the heat shield plate having a fender function is disposed above the exhaust manifold, the battery mounted above the heat shield plate, The air cleaner, wiring, etc. will not suffer heat damage from the exhaust manifold, and will not suffer damage from muddy water, flying stones, etc.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on the illustrated embodiments.

FIGS. 1 to 7 show an embodiment of an exhaust pipe heat shielding device for a motorcycle according to the present invention. In the figure, 1 is a motorcycle, and the body frame 2 of this motorcycle 1 is
consists of an up frame 3, a lower frame 4, a connecting frame 5, etc., which are integrally connected to each other. A single-cylinder engine 6 is mounted in a space surrounded by the front part of the lower frame 4 and the connecting frame 5, and an air cleaner 7 and a battery 8 are installed between the rear part of the lower frame 4 and the connecting frame 5. It is arranged along the longitudinal direction of the vehicle body.

[0009] Exhaust port of the engine 6 (not shown)
The front end of an exhaust pipe 9 is connected to the exhaust pipe 9, and the rear end of the exhaust pipe 9 is connected to the front part of an exhaust manifold 10 disposed at the rear of the engine 6. The rear part of the exhaust manifold 10 branches left and right, and the front ends of the muffler 11 are respectively connected to the branched parts. Thus, the muffler 11 is fastened and fixed to the vehicle body frame 2 via the mounting bracket 12, and is disposed on both left and right sides of the vehicle body.

Further, a heat shield plate 13 integrally formed of a heat-resistant material such as metal is provided above the exhaust manifold 10.
is installed. As shown in FIGS. 2 to 4, this heat shield plate 13 is horizontally arranged with a front end 13a bent downward from an intermediate part 13b, and a rear end 13c is located at the intermediate part to form a part of a rear fender 14, which will be described later. It is bent obliquely upward from the portion 13b, and the front and rear ends 13a, 13c are formed in an upwardly curved semicircular arc shape. As shown in FIGS. 6 and 7, the heat shield plate 13 is formed in a shape that can cover the entire upper part of the exhaust manifold 10, and has front and rear ends 13a.
, 13c are provided with attachment pieces 13d bent downward or upward and attached to the vehicle body frame 2, respectively. Note that the heat shield plate 13 is plated with a high heat reflectance in order to increase the heat shield efficiency.

On the other hand, above the rear part of the vehicle body frame 2, as shown in FIG. 1, a rear fender 14 made of resin is disposed and extends along the longitudinal direction of the vehicle body. As shown in FIG. 5, this rear fender 14 is integrally molded in a shape in which an intermediate portion 14a in the width direction is curved upward, and a front end of the intermediate portion 14a has a rear end portion 13c disposed on the lower surface of the heat shield plate 13. A stepped portion 14b is provided for the purpose. That is, the rear end portion 13c of the heat shield plate 13 and the front end portion of the rear fender 14 are configured to be integrally connected. Furthermore, flange portions 14c are provided on both left and right sides of the intermediate portion 14a by bending the flanges outward at a substantially right angle, and a rising piece portion 14d is provided at the rear end of the intermediate portion 14a. Thus, the rear fender 14 is attached by tightening the flange portion 14c and the rising piece portion 14d to predetermined positions on the vehicle body frame 2.

In the exhaust pipe heat shielding device of this embodiment, the air cleaner 7, the battery 8, and the exhaust manifold 10
A heat shield plate 13 is interposed between the heat shield plate 13 and the entire upper part of the exhaust manifold 10 with this heat shield plate 13, so that the radiant heat from the exhaust manifold 10 is blocked without being transmitted above the heat shield plate 13. Therefore, the air cleaner 7, battery 8, etc. will not suffer from heat damage. Further, the rear end portion 13 of the heat shield plate 13
c rises diagonally upward and extends toward the rear of the vehicle body, and is connected to the stepped portion 14b of the rear fender 14, so that the front end of the rear fender 14 does not separate from the exhaust manifold 10 and suffer heat damage. Therefore, muddy water, flying stones, etc. do not enter between the exhaust manifold 10 and the rear fender 14 and cause damage to the battery 8 and the like. That is, in conventional motorcycles, the rear fender 14 is made of resin and it is necessary to avoid heat damage, so the front end of the rear fender 14 cannot be brought too close to the rear of the exhaust manifold 10, and as a result, the above-mentioned problems occur. was occurring.

Although one embodiment of the present invention has been described above,
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention.

For example, the heat shield plate 13 in the embodiment described above
The shape of the exhaust manifold 1 is not limited to that shown in the figure.
Needless to say, it can be selected as appropriate depending on the planar shape of 0, etc.

[0015]

As described above, the exhaust pipe heat shielding device for a motorcycle according to the present invention includes a heat shield plate extending toward the rear of the vehicle body above the exhaust manifold, and a heat shield plate extending toward the rear of the vehicle body. Since it is connected to the front end of the rear fender and configured as a part of the rear fender, heat damage of the exhaust manifold to the battery, air cleaner, etc. mounted above the heat shield plate and the rear fender arranged at the rear of the vehicle body is prevented. It can be prevented. Moreover, in the exhaust pipe heat shield device of the present invention, since the rear end of the heat shield plate is disposed as a fender between the exhaust manifold and the rear fender, muddy water, flying stones, etc. cannot penetrate above the heat shield plate. This prevents damage to batteries, etc. caused by muddy water, flying stones, etc.

[Brief explanation of drawings]

FIG. 1 is a side view showing a motorcycle to which an embodiment of the exhaust pipe heat shielding device according to the present invention is applied.

FIG. 2 is a perspective view of a heat shield plate constituting the heat shield device, viewed diagonally from the front left.

FIG. 3 is a perspective view of the heat shield plate as seen diagonally from the rear left.

FIG. 4 is a side view showing the heat shield plate.

FIG. 5 is a side view showing the rear fender.

FIG. 6 is a plan view showing a portion of the heat shield plate disposed above the exhaust manifold.

FIG. 7 is a side view showing the heat shield plate placed above the exhaust manifold.

FIG. 8 is a conceptual side view showing the vicinity of an exhaust manifold mounted on a conventional motorcycle.

[Explanation of symbols]

1　Motorcycle 9 Exhaust pipe 10 Exhaust manifold 13 Heat shield plate 13c Rear end of heat shield plate 14 Rear fender 14b Stepped section

Claims (1)

[Claims] [Claim 1] An exhaust pipe heat shield plate for a motorcycle equipped with an exhaust manifold to which the rear end of the exhaust pipe is connected,
A heat shield plate extending toward the rear of the vehicle body is disposed above the exhaust manifold, and the rear end of the heat shield plate is connected to the front end of the rear fender, so that the heat shield plate is configured as a part of the rear fender. A motorcycle exhaust pipe heat shielding device characterized by: