JPH0658153U - Air cleaner device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to provide an air cleaner device for preventing muffled noise in a cab. In an air cleaner device in which an intake pipe 11 is attached to an outlet pipe 2 of an air cleaner 1 via a rubber hose 4, the outlet pipe 2 extends integrally with the air cleaner 1 through a resonator 3 formed downstream of the element. . A resonance passage 3b is formed inside the outlet pipe 2 and has a communication hole 3a for communicating with the resonator in its penetrating portion, and a communication passage 3b for communicating the communication hole 3a and the connection portion of the outlet pipe 2 with the rubber hose 4. ing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air cleaner device in which an intake pipe is attached to an outlet pipe of an air cleaner via a rubber hose.

[0002]

[Prior art]

 A technique in which a resonator is provided on the upstream side of an air cleaner is known (see, for example, Japanese Utility Model Publication No. 4-59363).

[0003]

[Problems to be solved by the device]

 However, in the above technology, a noise occurs from the downstream side of the air cleaner, for example, a structurally transmitted sound that is mechanically transmitted, a radiated sound from a rubber hose, and the like has a frequency band having a plurality of peaks, which is a problem as a cab's muffled noise. There is a problem that the intake noise cannot be prevented.

Further, Japanese Utility Model Application Laid-Open No. 2-100858 by the applicant of the present invention is a technique for integrally forming parts such as an intake duct and a resonator on a sound insulating cover, and is disclosed in Japanese Utility Model Application Laid-Open Nos. 63-141870 and 58-58. No. 1,930,16 and Japanese Utility Model Laid-Open No. 58-193,018 are techniques for improving noise reduction in a wide engine speed range, and are not related to the above problems.

Therefore, the present invention aims to provide an air cleaner device for preventing muffled noise in the cab.

[0006]

[Means for Solving the Problems]

 According to the present invention, in the air cleaner device in which the intake pipe is attached to the outlet pipe of the air cleaner via the rubber hose, the outlet pipe extends integrally with the air cleaner through the resonator formed on the downstream side of the element. The through hole has a communication hole with the resonator, and a resonance passage is formed inside the outlet pipe, which connects the communication hole and the connection portion with the rubber hose at the outlet of the outlet pipe.

[0007]

[Action]

 In the air cleaner device configured as described above, the intake vibration inside the rubber hose on the downstream side of the air cleaner is provided on the outlet side of the air cleaner through the resonance passage and the communication port by the separation wall provided on the outlet pipe. The noise on the downstream side of the air cleaner and the noise emitted from the rubber hose are prevented, and the muffled sound in the cab can be prevented.

[0008]

[Preferred Embodiment]

 The resonator can be divided and multiple resonance passages can be provided.For resonance on the upstream side of the air cleaner, the resonator can be divided into two chambers and a resonance pipe that connects the upstream inlet pipe and the outlet pipe can be provided. Good.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a cleaner element 6 is mounted inside a cylindrical air cleaner body 1, a cap 7 is attached to one end of the air cleaner body 1 with a wing nut 8, and an inlet pipe 1a is provided on the outer periphery thereof. Is attached and is connected to the duct 10 by a rubber hose 6.

Further, a resonator 3 is integrally provided concentrically at the other end of the air cleaner body 1, and an outlet pipe 2 extends through the air cleaner body 1 at the center thereof.

The outlet pipe 2 is connected to the intake pipe 11 of the engine by a rubber hose 4.

Further, a resonance passage 3b is fixed inside the outlet pipe 2 so as to form a resonance pipe by the resonator 3 and the communication passage 3a.

Therefore, since sound is absorbed by the resonator 3 at the downstream side of the air cleaner body 1, that is, at a position near the outlet pipe 2, in addition to the sound radiated from the upstream end of the air cleaner, mechanical noise from the duct support portion or the like is generated. Vibration noise is also reduced, and noise at the rubber hose 4 where the resonance passage 3b is open is also reduced.

Further, since the resonance is determined by the length and cross-sectional area of the resonance passage and the volume of the resonator, it is easy to adjust the frequency.

FIG. 2 shows a second embodiment, in which the resonator 3 of the first embodiment is divided by a partition wall 9a, and a resonance passage 9b is also provided on the second resonator 9 side. Same as the example.

Therefore, noises at a plurality of frequencies f1 and f2 can be reduced.

FIG. 3 shows a third embodiment, in which the resonator 3 of the first embodiment is divided by a partition wall 9a, and the second resonator 9 side is connected to the inlet pipe 1a by a resonance pipe 5 (see also FIG. 1). Since they are in communication, the sound emitted from the rubber hose 6 can be reduced.

[0018]

[Effect of device]

 Since the present invention is configured as described above, the muffled sound of the cab can be effectively reduced by combining the first to third embodiments.

[Brief description of drawings]

FIG. 1 is a side sectional view of an air cleaner showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a second embodiment by the AA cross section of FIG.

FIG. 3 is a cross-sectional view showing a third embodiment taken along the line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Air cleaner main body 2 ... Outlet pipe 3 ... Resonator 3b ... Resonance passage 4, 6 ... Rubber hose 5 ... Resonance pipe 9 ... Second resonator 10 ... Duct 11 ... Intake pipe

Claims (1)

[Scope of utility model registration request] 1. In an air cleaner device in which an intake pipe is attached to an outlet pipe of an air cleaner via a rubber hose, the outlet pipe extends integrally with the air cleaner through a resonator formed downstream of the element. An air cleaner characterized in that a through hole is provided with a communication hole with a resonator, and a resonance passage that connects the communication hole and a connection portion with a rubber hose at the outlet of the outlet pipe is formed inside the outlet pipe. apparatus.