JP2768958B2 - Motor cleaner air cleaner mounting structure - Google Patents

Description

The present invention relates to an air cleaner mounting structure for a motorcycle,
In particular, install a fuel tank etc. so as to straddle the tank rail,
The present invention relates to an improvement in an air cleaner mounting structure that facilitates replacement of an element when an air cleaner is arranged in a concave portion of the fuel tank or the like.

[Conventional technology]

In motorcycles, a concave fuel tank or tank cover may be installed so as to straddle a tank rail extending rearward from the head pipe, and an air cleaner may be arranged in a concave part of the tank or the like, and such an arrangement structure is employed. In such a case, replacement of the element in the air cleaner or cleaning work becomes a problem. Conventional air cleaners are generally constructed so that the element unit can be taken out upward, and the air cleaner is covered with a fuel tank (see, for example, JP-A-59-89226).

[Problems to be solved by the invention]

In the conventional air cleaner arrangement structure, when replacing or cleaning the element, it is necessary to first remove the fuel tank. Therefore, an extra operation of removing the fuel tank is required for element replacement and the like. Is large and heavy, so there is a problem that the replacement work of the element becomes large.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a motorcycle air cleaner mounting structure capable of performing element replacement without removing a fuel tank or the like and facilitating the replacement work. And

[Means for solving the problem]

The present invention comprises a tank rail 2b connected to the upper part of the head pipe 2a, and a pair of left and right down tubes 2b, 2b connected to the lower part, and a concave part 7a opening downward and forward. In a motorcycle in which a fuel tank or a tank cover (hereinafter referred to as a fuel tank 7 or the like) having a concave cross section having a cross section is mounted so as to straddle the tank rail 2b, an air cleaner 15 is mounted in the recess 7a of the fuel tank 7 or the like. A support pipe 28 having a structure along the inner surface of a concave portion 7a of the fuel tank 7 or the like is arranged so as to straddle the tank rail 2b in the concave portion 7a, and the upper side 28a of the support pipe 28 is The left and right side portions 28b and 28b are fixed to the tank rail 2b and the left and right down tubes 2b and 2b, respectively, and the left and right side portions 28b and 28b of the fuel tank 7 are fixed to the left and right side portions 28b and 28b. , Fix the right inner wall 7b, 7b The air cleaner case 16 of the cleaner is a saddle type having left and right case portions 16a, 16a. The air cleaner case 16 is disposed in the recess 7a of the fuel tank 7 or the like so as to straddle the tank rail 2b. The case 16 is fixed to the tank rail 2b, and element insertion openings 17a, 17a opening toward the front of the vehicle are formed in the front side walls of the left and right case portions 16a, 16a of the air cleaner case 16, and the insertion openings 17a, 17a are formed. 17a
Is closed by the cover 22 of the element unit 21 when the element unit 21 is inserted into the air cleaner case 16, and the element unit 21 is formed so as to face forward when the front fade 4 is rotated. It is characterized in that it can be moved in and out of the insertion opening 17a in the front-rear direction through the front opening of the tank.

[Action]

In the air cleaner arrangement structure of the present invention, when performing element replacement or the like, the front fork is rotated so that the insertion port side of the air cleaner case is opened, and in this state, the mounting bolt of the element unit is removed from the front opening of the fuel tank or the like. And remove the element unit forward. After replacing the element alone or the entire element unit with a new one, or removing dust and the like attached to the element, the element is inserted into the insertion opening from the front opening and fixed to the element case.

As described above, according to the present invention, the element can be attached and detached from the front of the vehicle only by rotating the front fork without removing the fuel tank and the like, and the element can be replaced or replaced.
Cleaning work can be performed very easily.

In addition, since the support pipe 28 is arranged in the recess 7a of the fuel tank 7 and fixed to the tank rail 2b and the down tubes 2b, 2b, and the fuel tank 7 is fixed to the support pipe 28, the fuel tank 7 can be simplified. It can be securely fixed to the body frame with a simple structure.

The air cleaner case 16 is connected to the left and right case sections 16a,
Since the saddle type 16a is arranged so as to straddle the tank rail 2b and is fixed to the tank rail 2b, the air cleaner capacity can be increased and the air cleaner case 16 can be securely fixed in the recess 7a.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 to 6 are views for explaining an air cleaner mounting structure for a motorcycle according to an embodiment of the present invention.

In the drawing, reference numeral 1 denotes a motorcycle employing the structure of the present embodiment. A body frame 2 of the motorcycle 1 has a tank pipe 2b connected to a head pipe 2a, and a pair of left and right arm brackets 2c at the rear end. And the two brackets 2c and the head pipe 2a are connected by a pair of left and right down tubes 2d. And the above head pipe 2a
As a result, a front fork 4 that supports the front wheel 3 at the lower end is supported to be steerable left and right. In front of this, fork 4 is on the left,
The right fork body 4a is connected by a pair of upper and lower brackets 4b, and a steering shaft 4c is disposed between the two brackets 4b. The steering shaft 4c is supported by the head pipe 2a. A rear arm 6 that pivotally supports the rear wheel 5 at the rear end is vertically pivotally supported by an arm bracket 2c of the body frame 2, and an engine unit is provided below a front portion of the body frame 2. 9 is suspended and supported.

The engine unit 9 is a water-cooled 4-cycle parallel 2
The cylinder type, the cylinder body 11, the cylinder head 12, and the head cover 13 are mounted on a crankcase 10 in a forwardly inclined state of approximately 45 degrees in a vehicle-mounted state.
A pair of left and right down-draft carburetors 14 are connected to the rear side of the cylinder head 12 via a joint 14a. A radiator 27 is provided between the left and right down tubes 2d.

A large fuel tank 7 is mounted on the upper part of the body frame 2, and a seat 8 is mounted behind the fuel tank. The fuel tank 7 has a concave cross section, and its lower edge and front edge are open. The left and right tank chambers 7c extend downward to near the lower end of the radiator 27. The fuel tank 7 is provided with a head pipe 2a of the body frame 2,
It straddles the tank rail 2b, and the inner wall 7 of the recess 7a
b, the ceiling wall 7d is supported by the support pipe 28. The support pipe 28 is formed by bending a pipe into a substantially U-shape, and a damper 29a mounted on an upper side 28a of the support pipe 28 is a top wall 7d of the fuel tank 7.
The side 28b is fixed to the inner wall 7b of the fuel tank 7 by bolts via grommets 29b. The upper side 28a of the support pipe 28 is fixed to the tank rail 2b, and the lower ends of both side parts 28b are fixed to the down tube 2d by bolts.

An air cleaner 15 is accommodated and arranged in the recess 7a of the fuel tank 7. The air cleaner case 16 of the air cleaner 15 is made of resin, has left and right case portions 16a, 16a, and is formed in a saddle shape straddling the tank rail 2b.
The back part connecting the left and right case parts is fixed to the tank rail 2b. Also, this air cleaner case 16
It has a two-part structure consisting of a front case 17 and a rear case 18, and is connected so as to be splittable by connecting bolts 19a. After this, an insertion hole formed in the bottom
An intake pipe 14b is inserted from 18a, the upper end of which is opened into the rear case 18, an engaging flange portion 14c formed in the middle thereof is fitted to the periphery of the insertion opening 18a, and the lower end is further inserted. It is connected to the vaporizer 14. In addition, 18b is a drain hose connection part.

A fixing bracket 17b is integrally formed at the center of the front case 17 in the vehicle width direction, and the bracket 17b is fixed to the tank rail 2b by fixing bolts 17c. An element insertion opening 17a is formed in a pair of left and right front side walls of the front case 17 so as to face the front of the vehicle. A guide pipe 20 made of resin is fixed to the front side wall below the insertion opening 17a with a fastening bolt 19b. The guide pipe 20 is for introducing outside air into the air cleaner 15. The lower end opening 20a faces the left and right inner side walls 7b of the fuel tank 7, and the upper end opening 20b.
Is located at the lower edge of the insertion opening 17a of the front case 17.

The element unit 21 is inserted into the front case 17 from the insertion opening 17a. The element unit 21 is formed by bonding and fixing an element 23 having an elliptical cylindrical shape and a tip closed by a bottom plate 23a to a resin lid portion 22, and the peripheral edge of the lid member 22 is fastened by fastening bolts 19c to the front case. It is detachably attached to 17. An introduction cylinder 22a is formed integrally with the lid 22, one end of which is opened in the element 23, and the other end is inserted into the guide pipe 20. The introduction cylinders 22a, 22a of the left and right element units 21 are communicated with each other by a communication pipe 24. The communication pipe 24 is for using the guide pipe 20 and the element unit 21 on the other side as a resonator for reducing noise by changing the resonance frequency.

Reference numeral 25 denotes a breather case, which is made of resin and has a structure in which a sub-chamber 25b communicating therewith is integrally formed in a main chamber 25a, and the sub-chamber 25b is fixed to the tank by a fixing bolt 25c. It is fixed to the rail 2b. The main room 25
a is connected to the head cover 13 by a connection hose 26a, and the sub-chamber 25b is connected to the air cleaner 15 by a connection hose 26b.
Is connected to the rear case 18.

Further, the front and the left and right sides from the head pipe 2a to the radiator 27 in front of the vehicle body frame 2 are surrounded by a vehicle body cover 30. The body cover 30 includes a front cover 31 surrounding the front of the vehicle and left and right sides surrounding the left and right sides.
It has a three-part structure consisting of the right side cover 32. The rear edge of the side cover 32 is in contact with the outer wall of the fuel tank 7, and an opening 32f for introducing outside air into the vehicle body cover 30 is formed at the front portion.

 Next, the operation and effect of this embodiment will be described.

In the present embodiment, the traveling wind flows from the opening 32f of the side cover 32 into the recess 7a of the fuel tank 7, and a part of the traveling wind is introduced into the air cleaner case 16 from the guide pipe 20 via the element 23, and at that time, the air is purified. Air is vaporized14
Through the cylinder. The remainder of the traveling wind is left between the left and right inner side walls 7b of the fuel tank 7 and the air cleaner.
It flows out to the rear of the vehicle through the air passage between the left and right walls of the vehicle.

When replacing or cleaning the element 23, the side cover 32 is removed, and the front fork 4 is rotated in any direction so that the vicinity of the front opening of the fuel tank 7 is opened. Then, the element unit 21 can be seen from the front through the front opening, and in this state, the communication pipe 24 is removed, the fastening bolt 19c is removed, the element unit 21 is pulled forward, and replaced with a new element unit, or the element is cleaned. After doing
This is inserted through the insertion opening 17a and fixed to the front case 17 with the fastening bolt 19c.

As described above, in the air cleaner arrangement structure of the present embodiment, since the element unit 21 is arranged so as to face the front from the front opening of the fuel tank 7 and is detachably bolted and fixed from the front side, the fuel tank 7 can be removed. The element unit 21 can be replaced, and the replacement operation can be greatly simplified.

Further, when the air cleaner 15 is disposed in the concave portion 7a of the fuel tank 7 as in this embodiment, the hot air or the like that has passed through the radiator 27 stays in the vicinity of the air cleaner 15 and the temperature of the air supplied to the cylinder increases, thereby increasing the charging efficiency. However, in the present embodiment, the traveling wind introduced from the opening 32f reliably discharges the hot air to the rear of the vehicle, so that the problem of the decrease in the charging efficiency can be solved.

According to the present embodiment, the support pipe 28 is disposed in the recess 7a of the fuel tank 7 so as to straddle the tank rail 2b and is fixed to the tank rail 2b and the down tubes 2b, 2b. Left and right sides 28b, 28b of 28
Since the left and right inner side walls 7b, 7b of the fuel tank 7 are fixed to the fuel tank 7, the vehicle body frame can be securely fixed with a simple structure.

The air cleaner case 16 is connected to the left and right case sections 16a,
Since the air cleaner case 16 is arranged so as to straddle the tank rail 2b and is fixed to the tank rail 2b, the capacity of the air cleaner can be increased, and the air cleaner case 16 can be securely fixed in the recess 7a.

〔The invention's effect〕

As described above, according to the motorcycle air cleaner mounting structure of the present invention, the element unit is inserted from the element insertion opening formed in the front wall of the air cleaner case, and the air cleaner case is detachably fixed, and the front fork is turned. When the fuel tank is moved, the element insertion opening faces forward from the front opening of the fuel tank, so that the element can be replaced while the fuel tank is mounted, and the replacement work can be greatly facilitated.

In addition, since the support pipe is arranged in the recess of the fuel tank and fixed to the tank rail and the down tube, and the fuel tank is fixed to the support pipe, the fuel tank can be securely fixed to the body frame with a simple structure. There is.

Furthermore, since the air cleaner case is arranged so as to straddle the tank rail as a saddle type having left and right case portions and fixed to the tank rail, the capacity of the air cleaner can be increased and the air cleaner case is securely fixed in the recess. There is an effect that can be done.

[Brief description of the drawings]

1 to 6 are views for explaining an air cleaner mounting structure according to an embodiment of the present invention. FIG. 1 is a partially sectional plan view, FIG. 2 is a partially sectional side view, and FIG. FIG. 4 is a front view, FIG. 4 is a rear view, FIG. 5 is a sectional front view showing a supported state of a fuel tank, and FIG. 6 is a left side view of a motorcycle employing the structure of the embodiment. In the figure, 1 is a motorcycle, 2 is a body frame, 2b is a tank rail, 7 is a fuel tank, 7a is a recess of the fuel tank, 15 is an air cleaner, 16 is an air cleaner case, 17a
Denotes an element insertion port, and 21 denotes an element unit.

Claims (1)

(57) [Claims] 1. A cross-sectional concave portion having one tank rail connected to an upper portion of a head pipe, a pair of left and right down tubes connected to a lower portion, and having a concave portion that opens downward and forward. In a motorcycle in which a fuel tank or a tank cover (hereinafter referred to as a fuel tank or the like) is mounted so as to straddle the tank rail, an air cleaner is mounted in the concave portion of the fuel tank or the like. A support pipe shaped along the inner surface of the recess,
The tank rail is disposed in the recess so as to straddle the tank rail, the upper side of the support pipe is fixed to the tank rail, and the left and right sides are fixed to the left and right down tubes, respectively. The left and right inner side walls of the fuel tank are fixed to the right side, and the air cleaner case of the air cleaner is a saddle type having left and right case parts, and the air cleaner case is inserted into the recess of the fuel tank or the like. The air cleaner case is fixed to the tank rail while being arranged so as to straddle the tank rail, and an element insertion opening that opens toward the front of the vehicle is formed on the front side wall of the left and right case portions of the air cleaner case. The insertion opening is closed by the lid of the element unit when the element unit is inserted into the air cleaner case. Cleaner attachment structure for a motorcycle characterized in that it enabled and out in the longitudinal direction from the insertion opening through said front opening of the fuel tank facing forward when rotates the click 4.