JP3836224B2 - Motorcycle cowling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cowling device for a motorcycle that advantageously forms an intake passage leading to an intake system of an engine. Here, the intake system of the engine refers to a path including an engine, a carburetor, and, if necessary, an air cleaner.
[0002]
[Prior art]
The Hei 9-8 6 463, intake passage openings for headlight provided forward to the front center of the upper cowl for covering, and further separate opening air guide port thereunder, running wind from the air guide port A motorcycle cowling device is disclosed that guides the air to an air cleaner.
[0003]
[Problems to be solved by the invention]
By the way, the air guide port requires an air guide member for forming an intake passage toward the air cleaner. The air guide member is formed separately from the upper cowl, and is attached to the inside of the upper cowl. I had to. Therefore, the structure is complicated, and the number of parts and the number of assembly steps are increased.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, a cowling device for a motorcycle according to the present invention includes a head pipe that pivotally supports a front wheel in a steerable manner, a main frame that extends rearward from the head pipe and supports an engine, an upper cowl covering the front of the head pipe, automatic two-wheeled vehicle of the cowling device and a headlight which are disposed inside the upper cowl to face the front in the opening provided on the front surface of the upper cowl The upper cowl is integrally provided with a partition portion that extends rearwardly from the lower side of the opening portion of the upper cowl, and the partition portion and the lower surface of the headlight form an intake passage that communicates with the intake system of the engine. In addition, the lower surface of the headlight facing the intake passage is formed by a concave portion that is concave upward .
[0005]
【The invention's effect】
Running wind enters from the opening portion of the headlight provided on the front surface of the upper cowl to an upper cowl inner, is constituted by a partition portion of the lower surface and the upper cowl of the headlight, and a recess which is concave upward is formed The air flows through the intake passage facing the lower surface of the headlight toward the rear head pipe, and is sucked into the engine from the tip of the intake system of the engine. Therefore, a conventional air guide member separate from the upper cowl is not required, so that the structure of the intake passage can be simplified, and the number of parts and the number of assembly steps can be reduced.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a side view of a front cowl according to this embodiment shown with a headlight attached, FIG. 2 is a front view thereof, FIG. 3 is a plan view of the same (with no headlight attached), and FIG. FIG. 5 is a partial cutaway view of the front side of the vehicle body.
[0007]
As shown in FIG. 4, in this motorcycle, an in-line multi-cylinder engine 3 is disposed between a front wheel 1 and a rear wheel 2, and the in-line multi-cylinder engine 3 includes a pair of left and right main frames 4 passing above. And a pair of left and right pivot frames 5 extending in the vertical direction.
[0008]
The front end of the main frame 4 is connected to the head pipe 6, and a front fork 7 is attached to be rotatable by a handle 8. The front fork 7 extends in the vertical direction in a pair of left and right sides, and has a front wheel at the lower end. 1 so that the front wheel 1 is supported by the head pipe 6 so as to be steerable.
[0009]
The front part of the vehicle body is covered with a front cowl 10, and the front cowl 10 is composed of an upper cowl 11, a side cowl 12, and an under cowl 13. A screen 14 is attached, and a headlight opening 16 facing the front portion of the headlight 15 is formed at the front center below the screen 14.
[0010]
The side cowl 12 covers the upper left and right including the cylinder portion of the engine 3 and the radiator 17 disposed in front of the engine 3, and the under cowl 13 covers the lower left and right of the engine 3 and the exhaust pipe 18 from the rear of the front wheel 1. Covering.
[0011]
A fuel tank 20 is supported on the main frame 4, an air cleaner 22 is accommodated in a concave portion 21 that protrudes upward on the lower surface side thereof, and the tip of an intake duct 23 that extends forward from the upper front surface thereof is Further, it protrudes downward into a space behind the head pipe 6 and surrounded by the left and right main frames 4 (FIG. 5).
[0012]
The path from the front end of the intake duct 23 to the air cleaner 22 and the carburetor 24 connected to the lower clean side and the intake port (not shown) of the engine 3 forms the intake system in the present application, and is taken in from the front end of the intake duct 23. The traveled wind is supplied from the air cleaner 22 to the engine 3 via the carburetor 24.
[0013]
A rear cowl 26 supported by a seat rail 25 extending rearward from the upper part of the pivot frame 5 and a seat 27 provided thereon are disposed behind the fuel tank 20.
[0014]
A front end portion of the rear swing arm 28 is rotatably supported at an intermediate portion in the vertical direction of the pivot frame 5. An intermediate portion of the rear swing arm 28 is connected to the pivot frame 5 side via a shock absorber 29, and the rear wheel 2 is rotatably supported at the rear end portion.
[0015]
FIG. 5 is a view showing the front part of the vehicle body in more detail. The headlight 15 is supported by a stay 30 extending forward from the head pipe 6 and is connected to the inside of the upper cowl 11 as described later on the left and right sides. Has been.
[0016]
The tip of the stay 30 is fastened together with the front central portion of the upper cowl 11 at a position above the headlight 15 by a decorative screw 31. A plurality of air holes 32 are formed in the curved surface portion facing forward near the periphery of the headlight opening 16.
[0017]
A thin instrument panel 34 is supported by a middle portion of the stay 30 via a stay 33. The upper left and right sides of the upper cowl 11 are fastened together with the rearview mirror 36 to upper ends of stays 35 that extend from the main frame 4 side to the left and right. The space behind the headlight 15 and the front of the head pipe 6 is surrounded by the upper cowl 11.
[0018]
As apparent from FIGS. 1 to 3, the central portion of the lower side of the headlight opening 16 is a concave portion 40 that curves downward and inward, and corresponds to the concave portion 40 on the lower surface 41 of the headlight 15. The portion has a concave portion 42 that is concave upward (FIG. 1), and the concave portion 40 and the concave portion 42 allow the air guide opening 43 to open at the center of the lower portion of the headlight 15 when viewed from the front (FIG. 1). 2).
[0019]
A plate-like partitioning portion 45 is integrally extended and formed in the portion of the air guide opening 43 that is continuous with the recess 40, which is the lower side of the headlight opening 16, facing the inner side of the upper cowl 11 (FIG. 3). ), An intake passage 46 is formed between the partition 45 and the lower surface 41 of the headlight 15 (FIG. 1).
[0020]
The partition 45 extends rearward slightly longer than the headlight 15, and the head pipe 6 and the tip of the intake duct 23 are positioned in the vicinity of the upper extension of the intake passage 46.
[0021]
Reference numeral 47 in the drawing denotes a seal, which is interposed in an overlapping portion between the upper part of the headlight 15 and the upper cowl 11 above the headlight opening 16 (FIG. 1). Reference numeral 48 denotes a boss for screwing a mounting portion 49 formed on each of the left and right sides of the headlight 15. Reference numeral 50 denotes a mounting hole for the decorative screw 31, 51 denotes a receiving recess for the position lamp 52, and 53 denotes a rearview mirror. 36 mounting seats.
[0022]
Next, the operation of this embodiment will be described. In FIG. 1, the traveling wind W enters the inside of the upper cowl 11 from the air guide opening 43 formed by the headlight 15 and the upper cowl 11, and passes through the intake passage 46 formed by the lower surface 41 of the headlight 15 and the partition portion 45. Then, the air flows backward, and eventually reaches the vicinity of the head pipe 6 and is taken into the intake system of the engine from the intake duct 23 of the air cleaner 22.
[0023]
Therefore, the intake passage 46 can be reliably formed with respect to the air cleaner 22 and the intake passage 46 is formed using the partitioning portion 45 integral with the lower surface 41 of the headlight 15 and the upper cowl 11, so that it is separate from the conventional case. This eliminates the need to prepare the air inlet member, simplifies the structure of the intake passage 46, and reduces the number of parts and the number of assembly steps.
[0024]
The present invention is not limited to the above-described embodiment, and can be variously modified. For example, the partition 45 is not provided exclusively for forming the intake passage 46, and is a wall for forming an air guide path to the radiator. A part configured with other functions, such as a part, can also be used. Furthermore, the air intake system of the engine can be omitted.
[Brief description of the drawings]
FIG. 1 is a side view of a front cowl of an embodiment. FIG. 2 is a front view of the front cowl. FIG. 3 is a plan view of the motorcycle. Figure showing a partial cutout of the part side [Explanation of symbols]
6: head pipe, 10: front cowl, 11: upper cowl, 15: headlight, 16: opening for headlight, 22: air cleaner, 23: air intake duct, 40: recess, 41: lower surface of headlight, 42: Concave portion on the lower surface of the headlight, 43: air inlet, 45: partition, 46: intake passage,

Claims (1)

A head pipe that pivotally supports the front wheels, a main frame that extends rearward from the head pipe to support the engine, an upper cowl that covers the front of the head pipe, and an opening provided in front of the upper cowl in cowling device automatic two-wheeled vehicle equipped with a headlight disposed inside the upper cowl to face the front surface section, extending inside the upper cowl to the rear from the opening subordinates sides on the upper cowl A partition portion is provided integrally, and the partition portion and the lower surface of the headlight form an intake passage that leads to the intake system of the engine, and a concave portion in which the lower surface of the headlight facing the intake passage is recessed upward A cowling device for a motorcycle, characterized in that it is formed by:

Images