JPS6021087B2 - Motorcycle air cleaner device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air cleaner device for a motorcycle, and in particular,
This invention relates to an air cleaner device for a motorcycle that has a simplified structure by reducing the number of parts by using an engine suspension stay.

Motorcycles have many space constraints due to their structure, so various design efforts are required to make effective use of space in terms of mounting positions of parts, shape, structure, etc.

In particular, air cleaner devices require a predetermined volume and must satisfy certain conditions regarding the mounting position, so various ideas have been made regarding the design thereof. The present invention has been made for the purpose of further simplifying the structure of this air cleaner device by making effective use of space and reducing the number of parts as described above. According to the present invention, an engine has a flat wall portion in which an opening is formed and side wall portions rising from both sides of the flat wall portion, and supports the engine by attaching the side wall portions to the vehicle body and the engine. A space is provided between the suspension stay, a plate-shaped cleaner element formed on the plane wall portion, and the cleaner element to cover the cleaner element and to surround the cleaner element with the engine. A fair cleaner device for a motorcycle is provided, comprising a cover held between a suspension stay and an air outlet provided in the cover.

In this case, a tubular member for air intake is fixed to the vehicle body frame, and the outer end of the tubular member is positioned between both side wall portions of the engine suspension stay, and a carburetor is attached to the cover. It is preferable to provide an air outlet leading to.

Furthermore, it is preferable that the engine suspension stay is connected to the tubular member, and the engine is suspended using the tubular member. Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a motorcycle equipped with the air cleaner device of the present invention, in which an engine 14 is suspended at the lower part of a press frame 12 that is generally T-shaped as a whole.

The engine has the cylinder 16 at the front and the crankcase 1.
8 is supported by attaching it to the vehicle body frame at two or three locations. According to the present invention, the engine suspension stay 24 connects the mounting portion of the crankcase and the mounting portion 22 on the vehicle body frame side, and the air cleaner is installed using the stay itself and the surrounding space. A device 26 is provided. The structure of the air cleaner device 26 will be explained below with reference to FIGS. 2 and 3.

A tubular member, for example, a steel pipe 28 with a circular cross section, is installed above the engine 16 in the vehicle body frame 12 and extends inside and outside the frame.
is fixed.

A boss portion 22 for mounting the engine is formed on the tubular member 28, and is connected to the mounting portion 20 of the crankcase by a stay 24 for suspending the engine. The engine suspension stay 24 is made as a steel plate press-formed part, and has a flat wall part 32 in which a closing part 30 is formed, and side wall parts 34 rising from both sides of the flat wall part and extending rearward. There is. Each mounting hole for the tubular member 28 on the vehicle body side is formed in the side wall portion as shown. A plate-shaped cleaner element 36 is provided on the front surface of the flat wall portion 32 of the engine suspension stay 24 over almost the entire surface.

Further, a cover 38 covering the cleaner element is attached to the engine suspension stay 24 by fastening screws 40 or the like. The cover 38 has a peripheral rising portion 42 for defining a sealed space 42 between the cover 38 and the cleaner element 36 and for sandwiching the peripheral portion of the cleaner element between the cover 38 and the planar wall portion. Further, on the outer periphery of the cover 38, there is an outer edge rising portion 43 that surrounds the outer periphery of the engine suspension stay and extends rearward.
is formed. The cover is preferably made of a synthetic resin molded product, but it can also be made of other materials such as metal. An air outlet 44 is provided on the side of the cover.
is formed and supplies purified air through conduit 46 to the carburetor in the crankcase.

On the other hand, the outlet end (outer end) of the tubular member 28 that sucks air from the interior space of the vehicle body frame is located between the side wall portions 34 of the engine suspension stay. Also, the closing portions 30, 3 of the flat wall portion 32 of the stay for suspending the engine are provided.
As shown in FIGS. 2 and 3, the sloped portions 48, 48, which are punched out with a zero, are bent rearward and formed to sandwich the outlet end of the tubular member 28 from both the upper and lower sides. therefore,
The outlet end of the tubular member 28 is connected to the side wall portions 34, 34,
Since it is surrounded by the above-mentioned bent slope portions 48, 48 and the blocking wall of the outer edge rising portion 43 of the cover 38, most of the intake air is introduced from the dust-free atmosphere inside the vehicle body frame as shown by the arrow X. It has become. As shown by arrow Y, some outside air is also sucked in from the gap around the outer end of the tubular member 28, but this is because dust is removed while it bypasses the cover 38 and the blocking wall of the engine suspension stay 24. and the amount is small, so that only sufficiently clean air can be inhaled as a whole.
The air sucked in in this way passes through the opening 30 of the plane wall portion 32,
30, the air is cleaned while passing through a cleaner element 36, and is supplied to a vaporizer (not shown) through the air outlet 44 and conduit 46. Since the air cleaner device for a motorcycle according to the present invention has the configuration described above, the following effects can be obtained. First, since the engine suspension stay 24 is used as a main component of the air cleaner device, such as as an intake air introduction part and for holding the cleaner element, an air cleaner device with a small number of parts and a simple structure can be obtained.

Also, in terms of space, since the structure directly utilizes the engine suspension stay, it can be accommodated in the minimum space.

Further, the cleaner element 36 can be held simply by being compressed between the engine suspension stay and the rising portion of the cover, and its sealing performance can also be ensured.

That is, since the cleaner element itself is used as a sealing member, there is no need to provide any other sealing member, and the structure can be simplified. Furthermore, as the cleaner element, a plate-like element with a simple structure is used, and since the cleaner element is pressed between the engine suspension stay and the cover, it is vibration-proof with respect to the engine suspension stay and the cover. It has an effect.

[Brief explanation of drawings]

Fig. 1 is a side view showing the whole of a mechanical two-wheeled vehicle equipped with an air cleaner device of the present invention, Fig. 2 is an enlarged vertical cross-sectional view of the air cleaner device of the present invention, and Fig. 3 is a view taken along one plate m in Fig. 2. FIG. In each figure, the same reference numbers indicate the same parts.
12... Body frame, 14... Engine, 24... Engine suspension stay, 26...
... Air cleaner device, 28 ... Tubular member, 30 ... Sekiguchi, 32 ... Plane wall portion, 34 ... Side wall portion, 36 ... Cleaner Element, 38...cover, 43...outer edge rising portion, 44...air outlet portion, respectively. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. An engine suspension having a flat wall portion in which an opening is formed and side wall portions rising from both sides of the flat wall portion, and supporting the engine by attaching the side wall portions to a vehicle body and the engine. a plate-shaped cleaner element placed on the plane wall portion, and a space is provided between the cleaner element to cover the cleaner element, and the periphery of the cleaner element is surrounded by the engine suspension stay. 1. An air cleaner device for a motorcycle, comprising: a cover held between the two, and an air outlet portion provided in the cover. 2. An engine suspension stay that has a flat wall portion in which an opening is formed and side wall portions rising from both sides of the flat wall portion, and supports the engine by attaching the side wall portion to the vehicle body and the engine; a plate-shaped cleaner element placed on a wall portion; and a cover that covers the cleaner element by providing a space between the cleaner element and the periphery of the cleaner element between the engine suspension stay. A tubular member communicating between the inside and outside of the body frame is fixed to the vehicle body frame, the outer end of the tubular member is positioned between both side wall portions of the engine suspension stay, and an air outlet leading to the carburetor is provided in the cover. An air cleaner device for a motorcycle, characterized in that an air cleaner device for a motorcycle is provided with a section. 3. The air cleaner device for a motorcycle according to item 2, wherein the engine suspension stay is connected to the tubular member, and the engine is suspended via the tubular member.