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Dust cover

A technology of dust cover and inclined wall, applied in the field of dust cover, can solve the problems of large shear component, hindering the shrinkage of the corrugated cylinder, etc.

Active Publication Date: 2015-11-25
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, if the inclination angle of the inclined wall portion of the main valley portion is increased, when a force in the axial direction acts on the corrugated tube portion to shrink the corrugated tube portion, the compression component acting on the inclined wall portion is larger than the shear component. Relatively becomes larger, therefore, the inclined wall part is prone to longitudinal bending (Japanese: sitting flexion) which may hinder the smooth contraction of the corrugated tube part

Method used

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Embodiment Construction

[0034] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0035] figure 1 , figure 2A dust cover 10 according to an embodiment of the present invention is shown. The dust cover 10 has a thin cylindrical shape as a whole, and is formed of synthetic resin or rubber elastic body. The dust cover 10 of the present embodiment is formed of synthetic resin, and its material is not particularly limited. However, for example, a material obtained by mixing and dispersing ethylene propylene rubber (EPDM) in polypropylene (PP), which is a thermoplastic resin, has a good weather resistance. , formability, etc. are excellent, so it is preferably used. In particular, when the dust cover 10 is formed of thermoplastic resin, for example, polyolefin-based resin, polyamide-based resin, polyvinyl chloride-based resin, polyester-based resin, polyurethane-based resin, styrene-based resin, olefin-based resin Various thermoplastic e...

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Abstract

Provided is a dust cover having a novel structure in which smooth contractile deformation of a bellows tube is achieved while the number of main troughs is reduced and the length during contraction is reduced. A dust cover (10) having a bellows tube (12) in which a plurality of main troughs (14) as concavities are provided in joined fashion in an outer peripheral side, wherein the main troughs (14) are provided with one group of inclined walls (16, 16) that are inclined axially outward as the walls progress to the outer periphery, and the angles of inclination (β) of outer peripheral portions (60) of the inclined walls (16) are less than the angles of inclination (α) of inner peripheral portions (58) (α > β).

Description

technical field [0001] The present invention relates to a dust cover which covers, for example, a piston rod and the like of a shock absorber constituting an automobile suspension mechanism to prevent adhesion of sand, water, and the like. Background technique [0002] Conventionally, there is known a dust cover for preventing the adhesion of foreign substances such as sand, dust and water. For example, the dust cover is used for the following purpose. , thereby preventing foreign matter from adhering to the piston rod. The dust cover is formed as a whole in a thin-walled cylindrical shape made of a rubber elastic body, synthetic resin, etc., and the dust cover has a bellows cylinder portion that is continuously provided with a plurality of main valley portions that become depressions on the outer peripheral side, so that the dust cover can be It expands and contracts in the axial direction according to the amount of protrusion of the piston rod from the cylinder. For exam...

Claims

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Application Information

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IPC IPC(8): F16J3/04F16F9/38
CPCF16J3/041F16F9/38F16J3/042F16J3/043
Inventor 松村浩幸
Owner SUMITOMO RIKO CO LTD