JPH04224484A - Duct structure of air cleaner - Google Patents

Abstract

PURPOSE:To construct an air cleaner duct in such a structure as easy to insert in the air cleaner body and easy to remove a die at the time of single piece molding, with which the air suction amount and the rigidity are well secured. CONSTITUTION:The air suction duct 3 of an air cleaner of such a type as inserting the duct 3 in an opening of a cleaner case is composed of a duct member 9, which is made of a flexible material and shaped in bends, and a reinforcing rib member 12 having the same configuration as the axial direction section of the duct member 9. It shall be possible to fit by pressure the rib member 12 into the duct member.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct structure for an air cleaner suitable for motorcycles.

0002

[Prior Art] Conventionally, in motorcycles, the duct for air intake of the air cleaner was manufactured separately from the air cleaner body, and the duct was inserted into the air cleaner body, but the duct was bent in shape and the intake air was reversed. type is known. This type of duct is required to ensure sufficient air intake and rigidity, be easy to insert into the air cleaner body, and have a structure that allows for easy removal from the mold during integral molding.

0003

[Problems to be Solved by the Invention] However, if the cross-sectional area of the duct is maintained to ensure the amount of air intake, and reinforcing ribs are provided inside the duct to ensure the rigidity of the duct, the duct will be bent. In addition, if you try to increase the rigidity with a rubber duct, it will be necessary to increase the wall thickness, resulting in an increase in weight, or if you insert it into the air cleaner body. It has the problem of being difficult.

The present invention solves the above-mentioned problems, and provides an air cleaner duct structure that secures the air suction amount and rigidity, is easy to insert into the air cleaner body, and is easy to remove from the mold when integrally molded. With the goal.

[0005]

[Means for Solving the Problems] Therefore, the duct structure of the air cleaner of the present invention is such that the air suction duct 3 is inserted into the opening of the cleaner case 2, and the air suction duct 3 is made of a flexible material. It consists of a duct member 9 formed into a bent shape, and a reinforcing rib member 12 having the same shape as the axial cross section of the duct member 9, and is characterized in that the reinforcing rib member 12 can be press-fitted into the duct member. do.

[0006] The numbers added to the above configurations are for comparison with the drawings, and the configurations of the present invention are not limited thereby.

[0007]

[Operation] In the present invention, for example, as shown in FIGS. 1 to 3, when the air suction duct 3 is attached to the opening of the cleaner case 2, one end of the duct member 9 is attached to the opening of the cleaner case 2. After the duct member 9 is inserted and fixed, the reinforcing rib member 12 is forcibly press-fitted from the other end opening of the duct member 9 and fixed. Since the duct member 9 is made of a flexible material, the reinforcing rib member 12 can be easily press-fitted into the duct member 9.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. 1 and 2 show one of the air cleaners according to the present invention.
1 is a plan view showing a partial cross section of a filter, and FIG. 2 is a side view showing a partial cross section of a duct.

The air cleaner has a cleaner case 2 that houses a filter element 1 therein, an air suction duct 3, an elastic carburetor connecting pipe 4, and a side cover 5. , a partition wall 6 is provided to form a resonator chamber 7, and the resonator chamber 7 is communicated with the inside of the cleaner case 2 through an opening 8.

FIG. 3 shows a perspective view of the air suction duct 3 of the present invention, which includes a duct member 9 formed in a bent shape as a whole, and a reinforcing rib member 12 having the same shape as the axial cross section of the duct member 9. The duct member 9 is integrally molded from a flexible material such as rubber or resin, and the reinforcing rib 12 is integrally molded from hard resin. The duct member 9 has a flange 10 formed at the bent portion thereof, and grooves 11 formed above and below in the axial direction of the duct member 9, and the reinforcing rib member 12 has a rib portion 13 and a latching 14. Incidentally, the rib portion 13 may be provided with a hole or formed with unevenness to reduce noise.

When the air suction duct 3 is attached to the opening of the cleaner case 2, one end of the duct member 9 is inserted into the opening of the cleaner case 2, fixed to the opening by the flange 10, and then a reinforcement The rib member 12 is forcibly press-fitted from the other end opening of the duct member 9 along the groove portion 11 and fixed by the locking portion 14 . Since the duct member 9 is made of a flexible material, the reinforcing rib member 12 can be easily press-fitted into the duct member 9.

FIG. 4 is a perspective view showing the structure of the resonator chamber 7 explained in FIG. 1. By providing a partition wall 6 inside the side cover 5, forming an opening 8 in the lid member 15, and fixing the side cover 5 to the cleaner case 2 via the lid member 15, a resonator chamber 7 is formed. It reduces the generation of noise. Note that 16 is a clean room. In the conventional case, the resonator was installed on the carburetor connection pipe side, and the resonator and the suction duct were connected with a tube, but in this example, the side cover also serves as the resonator, so a special resonator and connection are required. This eliminates the need for tubes and tube fixing devices, and allows effective use of space.

FIG. 5 is a perspective view showing the structure of another example of the resonator chamber. The suction duct 20 includes upper and lower cases 21,
22, an intake section 23 and a resonator chamber 24 are formed inside, and an intake section 23 is formed on the lower surface of the lower case 22.
A discharge portion 25 is formed to communicate with the air, and the air is configured to flow as shown by the arrow in the figure.

[0014]

As explained above, according to the present invention, in the air cleaner of the type in which the air suction duct is inserted into the opening of the cleaner case, the air suction duct is formed of a flexible material into a bent shape. The reinforcing rib member has the same shape as the axial cross section of the duct member, and the reinforcing rib member can be press-fitted into the duct member, thereby reducing the air intake amount and rigidity. It is easy to insert into the air cleaner body, and
It is possible to provide an air cleaner duct structure that allows the mold to be easily removed during integral molding.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional plan view of an embodiment of an air cleaner according to the present invention.

[Fig. 2] Side view showing a partial cross section of Fig. 1

[Fig. 3] A perspective view showing one embodiment of the duct structure of the air cleaner of the present invention.

[Fig. 4] A perspective view showing an example of a resonator chamber.

[Fig. 5] A perspective view showing another example of the resonator chamber.

[Explanation of symbols]

2...Cleaner case, 3...Air suction duct, 9...Duct member, 12...Reinforcement rib member.

Claims (1)

[Claims] 1. An air cleaner of a type in which an air suction duct is inserted into an opening of a cleaner case, wherein the air suction duct includes a duct member formed of a flexible material into a bent shape, and A duct structure for an air cleaner, comprising a reinforcing rib member having the same shape as the cross section, and the reinforcing rib member can be press-fitted into the duct member.