Soundproof structure

A technology of structure and cover member, applied in the direction of transmission box, motorcycle, belt/chain/gear, etc., can solve the problems of increasing the number of parts, occupying space, large cost, etc., achieving a small number of parts, strengthening functions, and high sound insulation effect of effect

Inactive Publication Date: 2008-03-19
HONDA MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the soundproof structure is formed not on the box constituting the moving part but on the cover covering the moving part, if the cover is unnecessary, a special cover is provided for sound insulation, and the cover takes up space, resulting in an increase in size and the number of parts. increase, high cost
[0006] If the cover itself has a double-layer structure, the volume of the hollow part is secured in order to obtain the effect as a resonator, and the thickness of the cover increases and the size becomes larger and larger.

Method used

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Embodiment Construction

[0019] Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 4 .

[0020] The soundproof structure of this embodiment is applied to the transmission case of the power unit P mounted on the motorcycle 1 .

[0021] FIG. 1 is an overall side view of the motorcycle 1 .

[0022] The vehicle frame F is covered with a body cover C to form a vehicle body, and the power unit P supported on the frame F is composed of a water-cooled single-cylinder 4-stroke internal combustion engine E and a belt-type continuously variable transmission T extending from the internal combustion engine E to the left and rearward. , the crankshaft 25 of the internal combustion engine E is mounted on the vehicle frame F in a prone position directed in the vehicle width direction.

[0023] In this embodiment, the two-wheeled motor vehicle 1 is used as a reference for up and down, front and rear, and left and right.

[0024] The frame F has a head pipe 2 at the front end,...

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Abstract

A compact, low cost soundproof structure having a small number of parts utilizing ribs protruding from an inner face of a case of a power source or a power transmission device. In the soundproof structure, the ribs protruding from the inner face of the case form a single or a plurality of tubular bodies. A lid member covers an opening facing an inside of the case of the single or plurality of tubular bodies formed by the ribs to form a single or a plurality of tubular body inside spaces. Also, the single or plurality of tubular body inside spaces and an internal space of the case communicate with each other through a hole or holes bored in the lid member.

Description

technical field [0001] The present invention relates to a sound insulation structure of a power source and its power transmission device. Background technique [0002] As such a soundproof structure, Patent Document 1 discloses a cover structure for covering a driving unit of a work machine. [0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 2002-317463 [0004] The lid structure of the embodiment disclosed in this patent document is a double-layered lid with a hollow portion formed between the inner wall and the outer wall. Holes are provided in the inner wall to form a resonator that attenuates operating sound through resonance. [0005] Since the soundproof structure is formed not on the box constituting the moving part but on the cover covering the moving part, if the cover is unnecessary, a special cover is provided for sound insulation, and the cover takes up space, resulting in an increase in size and the number of parts. increase, the cost is h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B77/13B62J13/00F16H57/00F16F15/02F16H57/02F16H57/028F16H57/029F16H57/03
CPCF16H2057/0203F16H57/035B62K2202/00F16H57/028F02B67/06F02B61/02F02B77/13F16H2057/02065B62K11/00B62K11/04
Inventor 若生宏日比谷纯成
Owner HONDA MOTOR CO LTD
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