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dust cover

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

Active Publication Date: 2017-07-28
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 drawings.

[0035] figure 1 , figure 2A dust cover 10 according to one 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 this embodiment is formed of synthetic resin, and its forming material is not particularly limited, but, for example, a material obtained by mixing and dispersing ethylene-propylene rubber (EPDM) in polypropylene (PP), which is a thermoplastic resin, has excellent weather resistance. , formability, etc. are excellent, so it is preferably used. In particular, when the dust cover 10 is formed of a thermoplastic resin, such as polyolefin resin, polyamide resin, polyvinyl chloride resin, polyester resin, polyurethane resin, styrene resin, olefin resin, etc. Various thermoplastic elastomers such as polyolefin resins can be used, am...

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Abstract

The present invention provides a dustproof cover with a novel structure, which can reduce the length of shrinkage by reducing the number of main valleys, and can also realize smooth shrinkage deformation of the corrugated barrel. A dustproof cover (10), which has a corrugated tube portion (12), the corrugated tube portion (12) is continuously provided with a plurality of depressed main valleys (14) on the outer peripheral side, and the main valley portion (14) includes a A set of inclined wall parts (16, 16), the inclined wall part (16) is inclined to the outside in the axial direction as it goes to the outer periphery, and the inclination angle (β) of the outer peripheral part (60) of the inclined wall part (16) is set is smaller than the inclination angle (α) of the inner peripheral portion (58) (α>β).

Description

technical field [0001] The present invention relates to a dust cover that covers, for example, a piston rod of a shock absorber constituting a suspension mechanism of an automobile to prevent adhesion of dust, water, and the like. Background technique [0002] Conventionally, there is known a dustproof cover that prevents foreign matter such as sand, water, etc. from adhering. For example, the dustproof cover is used for the following purposes: , thereby preventing foreign matter from adhering to the piston rod. The dust cover is made into a thin-walled cylindrical shape made of rubber elastic body, synthetic resin, etc., and the dust cover has a corrugated tube part, and the corrugated tube part is continuously provided with a plurality of main valleys that become depressions on the outer peripheral side, so that it can Extends and contracts in the axial direction according to the protrusion amount of the piston rod from the cylinder. For example, such a dust cover is dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J3/04F16F9/38
CPCF16F9/38F16J3/041F16J3/042F16J3/043
Inventor 松村浩幸
Owner SUMITOMO RIKO CO LTD