JPH0511111Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to motorcycles, and particularly to an air cleaner installed in motorcycles that filters the atmosphere and supplies clean air to the engine.

BACKGROUND OF THE INVENTION A frame of a motorcycle has a head pipe at the front upper part of the frame, which is connected to a front fork to receive the reaction force of the front wheel. A seat is provided above the rear part of the frame extending rearward from the head pipe, and the engine is normally mounted in the lower part of the frame between the seat and the head pipe.

The front of the frame, especially near the head pipe, is covered with a front cover, but in so-called step-through type or underbone type motorcycles in which the frame part in front of the seat is formed low in a U-shape, the rider's legs are covered with a front cover. A leg shield that covers the front of the section is provided in connection with the front cover.

As shown in Japanese Utility Model Application No. 57-89858, an air cleaner that supplies filtered and clean intake air to the engine is provided at the rear of the front fork inside a cover that covers the vehicle body.

Problems that the invention aims to solve However, in conventional motorcycles like this, when performing maintenance and inspection work on the air cleaner, the air cleaner is located at the bottom of the vehicle body, making it difficult to access or requiring the removal of a large cover. This tends to complicate maintenance and inspection work, and providing a separate cover increases the number of parts for the cover.

Means and Effects for Solving the Problems The present invention relates to an improvement of an air cleaner for a motorcycle that eliminates such inconveniences, and includes a front cover that covers the periphery of the head pipe, and a front cover that extends from the front cover to the left and right and extends downward. In the motorcycle equipped with an extending leg shield, the front cover has a space sufficient to accommodate an air cleaner case in front of the head pipe and is opened to the front, so that the front cover has a space sufficient to accommodate the air cleaner case in front of the head pipe. The front opening of the front cover and the opening of the air cleaner case are housed in the space inside the front cover from the front opening of the cover, and are located in front of the head pipe and integrally fixed to the head pipe. It is characterized by a cover that can be opened and closed.

Since the present invention is constructed as described above, the front cover can be opened by simply removing the front cover, and the inside of the air cleaner case inside the front cover can be opened toward the front of the vehicle body. Since the air cleaner case is stored in the inner space and removably fixed to the head pipe, the air cleaner case can be taken out independently without the need to attach or remove the leg shield.As a result, maintenance and inspection of the air cleaner and replacement of the leg shield can be done easily. and can be easily accomplished separately.

Further, according to the present invention, the air cleaner case can be configured separately from the front cover, and since the front cover also serves as a lid for the front cover and the air cleaner case, the air cleaner case can be configured separately from the front cover. In addition, since the front cover also serves as the front cover and the lid of the air cleaner case, the shape of the front cover can be simplified, and the number of parts of the motorcycle can be reduced, leading to significant cost reductions. .

Embodiments Hereinafter, the present invention will be described with reference to illustrated embodiments. FIG. 1 is a side view of a motorcycle to which the present invention is applied. The frame of this motorcycle consists of a head pipe 1 at the upper front part, and a main frame 2 whose front end is fixed to the head pipe 1 and extends rearward along the center line of the vehicle body, with the middle part of the main frame 2 extending downward as shown in the figure. A space is formed between the seat 3, which is curved in a U-shape and attached to the rear of the main frame 2, and the head pipe 1 to facilitate getting on and off. A front wheel 4 is supported by a head pipe 1 via a front fork 5. main frame 2
A frame plate 6 extending downward is fixedly installed in the middle of the frame plate 6, and a rear wheel 8 is pivotally supported at the rear end of a rear fork 7 which is pivotally supported by the frame plate 6 so as to be swingable in the vertical direction. A rear action 9 is inserted between the rear end of the rear fork 7 and the rear part of the main frame 2. main frame 2
An engine 10 is suspended from the frame plate 6 and the main frame 2 and mounted with the cylinder 10a facing forward.

The body of this motorcycle is continuously covered with various cover members made of resin or the like, as shown exploded in FIG. A leg shield 11 extends downward from both sides of the head pipe 1 and covers the front part of the vehicle body. The leg shield 11 is made of a resin material, and has a shielding plate portion 11a extending left and right along its front edge.
1a to shield it from the wind. The inner edge portions of both the left and right shielding plate portions 11a, 11a are connected to side wall portions 11b, 11b, respectively, and these side wall portions 11b, 11b sandwich the main frame 2 from both sides and extend backward from the bottom of the main frame 2. It extends to And the rear ends are left and right body covers 12, 12, respectively.
is connected to.

A center cover 13 is attached along the upper edges of the side wall portions 11b, 11b, and the main frame 2 is passed through the interior surrounded by the center cover 13 and the side wall portions 11b, 11b.
Therefore, the center cover 13 has a U-shaped side surface that corresponds to the main frame 2. The front portion 13a of the center cover 13 is formed into a concave shape that opens toward the front, and both side edges of the concave portion are fixed to the upper back surface of the leg shield 11. In addition,
The center of the upper part of the leg shield 11 is an opening 14, and this opening 14 is closed by a front cover 15 so as to be openable and closable.
The front part 13a of the head pipe 1, the upper part of the leg shield 11, and the front cover 15 constitute a front cover 16 that covers the periphery of the head pipe 1. 17
is the handle 1 installed above the head pipe 1.
This is a steering wheel cover that covers the steering part of the 8th class.

A fuel tank 19 and a battery 20 are arranged at the bottom of the seat 3, and an air cleaner 21 is installed at the bottom of the seat 3.
As shown in the figures and FIGS. 3 and below, according to the present invention, the head pipe 1 is provided adjacent to and in front of the head pipe 1. The air cleaner 21 is constructed by housing an air cleaner element 24, which is a filtering material, in an air cleaner case 23 having an opening 22 on one side. A semi-cylindrical recess 26 is formed in the bottom wall 25 of the air cleaner case 23 facing the opening 22.
6 is placed in front of the front cover 16 of the head pipe 1, with the opening 22 facing forward. At this time, the position of the opening 22 matches the opening 14 at the top of the leg shield 11, and when the front cover 15 is removed, the air cleaner case 23
The inside of the air cleaner case 23 is opened toward the front of the vehicle through the opening 22 of the air cleaner case 23 and the opening 14 of the leg shield 11.

A groove 27 is provided on the end surface of the air cleaner case 23 on the opening 22 side to surround the opening 22, and a projecting wall 28 that fits into the groove 27 is provided on the inner surface of the front cover 15. and the fourth
As shown in the figure, the opening 22 of the air cleaner case 23 is sealed by the front cover 15 by fitting the projecting wall 28 into the groove 27 via a sealing rubber. Air cleaner case 23
As shown in FIG. 6, brackets 29 are protruded from both sides of the lower part of the opening 22, and a cylindrical mounting piece 30 is further provided which protrudes from the inner surface of the bottom wall 25 to the front surface of the opening 22. ing. The mounting piece 30 is a bolt 3 protruding from the head pipe 1.
3, and the threaded portion of the bolt 33 is attached to the mounting piece 3.
It protrudes forward from the end of 0. Front cover 1
5 includes these brackets 29 and mounting pieces 30.
A bolt hole 31 and a bolt hole 32 are provided correspondingly, and the threaded portion of the bolt 33 is inserted into the bolt hole 3.
The front cover 15 is fixed to the air cleaner case 23 by passing the bolt 34 through the bolt hole 31 and tightening it with a nut 33a.

The left and right edges of the front cover 15 are bent rearward to form flange portions 35, as shown in FIG. Then, as described above, cover the front cover 15.
When the front cover 15 is fixed to the air cleaner case 23, the flange portion 35 fits into the groove 36 provided along both sides of the opening 14 of the leg shield 11, and the outer surface of the front cover 15 is fixed to the leg shield 11.
form a continuous surface on the outer surface of the That is, the front cover 15 is a lid member that seals the air cleaner case 23, and also constitutes a part of the front cover.

A presser piece 37 is protruded from the inner surface of the front cover 15, and the air cleaner element 24 is sandwiched between the presser piece 37 and a step 38 provided on the side wall of the air cleaner case 23. It is supported within the air cleaner case 23. A chamber A that penetrates the air cleaner element 24 and is located in front of it.
An air intake pipe 39 communicating with the hole 40 (FIG. 5) provided in the bottom wall 25 of the air cleaner case 23
and extends rearward through the rear end 39a in an airtight manner.
is open into the front cover 16. A hole 41 is inserted from the rear chamber B of the air cleaner element 24.
(Fig. 5), a suction pipe 42 extends through it in an airtight manner,
The intake pipe 42 is connected to the intake port of the engine 10 via a carburetor 43, as shown in FIGS. 1 and 3. Engine intake air is supplied from the rear end 39a of the air intake pipe 39 to the chamber A via the air intake pipe 39, and then filtered by the air cleaner element 24, and then to the chamber B, the intake pipe 42 and the carburetor 4.
3 and is sucked into the engine 10.

Since this embodiment is configured as described above,
When nuts 33a and bolts 34 are removed and front cover 15 is removed, the inside of air cleaner case 23 is opened toward the front of the vehicle body. Therefore, the inside of the air cleaner case 23 can be easily accessed from the front of the vehicle body without being obstructed by other vehicle body parts, making maintenance and inspection of the air cleaner extremely easy.

Further, the front cover 15 constitutes a part of the front cover 16, and the air cleaner case 23
Since it also serves as a lid, the number of parts of the air cleaner case 23 is reduced, and the air cleaner case 23 can be opened by simply removing the front cover 15. Furthermore, an air cleaner case 23 is installed at a high position adjacent to the head pipe 1,
In addition, since the air intake port 39a opens into the inside of the front cover 16, there is no fear that water splashed up from the road surface during driving will enter the air cleaner case 23 through the air intake pipe 39.

Furthermore, in this embodiment, the engine 1 is connected to the air cleaner 21 adjacent to the head pipe 1.
Suction pipe 4 leading to a vaporizer 43 located near 0
2 can be ensured sufficiently, thereby making it possible to improve the engine torque in the medium and low speed rotation range.

[Brief explanation of the drawing]

Fig. 1 is a side view of a motorcycle to which the present invention is applied, Fig. 2 is an exploded perspective view of the cover of the motorcycle, Fig. 3 is a longitudinal sectional view of the head pipe section, and Fig. 4 is a side view of a motorcycle to which the present invention is applied.
FIG. 5 is a perspective view of the air cleaner case viewed from the rear, and FIG. 6 is a perspective view of the air cleaner case and the front cover viewed from the front. 1... Head pipe, 2... Main frame,
3... Seat, 4... Front wheel, 5... Front fork, 6... Frame plate, 7... Rear fork, 8... Rear wheel, 9... Rear action, 10
...Engine, 11...Legshield, 12...
...Body cover, 13...Center cover, 14...
...Opening, 15...Front cover, 16...Front cover, 17...Handle cover, 18...Handle, 19...Fuel tank, 20...Battery, 21...Air cleaner, 22...Opening, 23
... Air cleaner case, 24 ... Air cleaner element, 25 ... Bottom wall, 26 ... Recess, 27
... Groove, 28 ... Projection wall, 29 ... Bracket, 3
0... Mounting piece, 31, 32... Bolt hole, 33,
34... Bolt, 35... Flange part, 36...
...groove, 37...presser piece, 38...step, 39...
...Air intake pipe, 40, 41...hole, 42...intake pipe, 43...carburizer.

Claims (1)

[Scope of utility model registration request] A front cover that covers the area around the head pipe,
In a motorcycle equipped with a leg shield that protrudes from the front cover to the left and right and extends downward, the front cover has a space sufficient to accommodate an air cleaner case in front of the head pipe, and is open to the front and extends downward. The opened air cleaner case is housed in the space inside the front cover from the front open part of the front cover, and is located in front of the head pipe and is integrally fixed to the head pipe. An air cleaner for a motorcycle, characterized in that the opening of the case is covered with a front cover that can be opened and closed.