dust cover
A technology of dust cover and area, which is applied in the field of dust cover, can solve the problems of increased quantity, bending of corrugated part, insufficient, etc., and achieve the effect of suppressing preferential shrinkage
Active Publication Date: 2018-12-25
SUMITOMO RIKO CO LTD
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Problems solved by technology
[0008] However, it is not sufficient to merely provide large pitch portions and small pitch portions with different pitch sizes on the corrugated portion as in Patent Document 1, and deform the large pitch portions and small pitch portions in stages.
That is, when the small-pitch portion is provided with a small axial dimension relative to the entire bellows portion, the large-pitch portion becomes too long, and there is a possibility that the body of the bellows may easily bend when the large-pitch portion is deformed.
On the other hand, when the small-pitch portion is provided with a large axial dimension relative to the entire corrugated portion, the number of crests required to achieve the desired maximum axial length of the corrugated portion increases, and the axial direction of the corrugated portion increases. The undesired case of the longer minimum length
Method used
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Embodiment Construction
[0045] Embodiments of the present invention will be described below with reference to the drawings.
[0046] figure 1 In the figure, the dust cover 10 which is 1st Embodiment of this invention is shown. In the following descriptions, the up and down directions refer to the axial direction in principle, that is, figure 1 in the up and down direction.
[0047] The dust cover 10 has a thin cylindrical shape as a whole, and is made of resin in this embodiment. As a material for forming the dust cover 10 , for example, a material obtained by mixing and dispersing ethylene-propylene rubber (EPDM) in polypropylene (PP), which is a thermoplastic resin, is preferably used because of its excellent weather resistance and moldability. In particular, in the case of thermoplastic resins, polyolefin resins such as polypropylene and polyethylene, polyamide resins, polyvinyl chloride resins, polyester resins, polyurethane resins, styrene resins, olefin resins, etc. Any of resin-like resi...
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The invention provides a dust cover which has a novel structure and is capable of preventing the bending of a bellows portion. A bellows portion 12 is structured such that an upper portion 12a and a lower portion 12b are provided adjacent to each other on both axial sides of an intermediate portion 12c. An inclination angle of inclined wall portions 16c constituting an apex portion 14c of the intermediate portion 12c is less than that of inclined wall portions 16a forming crest portions 14a of the upper portion 12a and that of inclined wall portions 16b having crest portions 14b of the lower, Section 12b, and the intermediate portion 12 is preferably contracted in an axial direction across the upper and lower portions 12a, 12b when axial compression is applied to the bellows portion 12.
Description
[0001] Cross References to Related Applications [0002] This application claims priority to Japanese Patent Application JP2016-012114, filed Jan. 26, 2016, entitled "Dust Kaber" (dust cover), the entire contents of which are incorporated herein by reference. technical field [0003] 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 [0004] Conventionally, there are known dust covers that prevent foreign matter such as sand and / or water from adhering, for example, the dust cover is adopted for the following purpose: by mounting on the shock absorber and protruding the piston rod from the cylinder Cover the part to prevent foreign matter from adhering to the piston rod. For example, as disclosed in Japanese Patent Application Laid-Open No. 10-331897 (Patent Document 1), the dust cover has a thin-w...
Claims
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IPC IPC(8): F16F9/38
CPCF16F9/38F16F2226/00F16J3/043
Inventor 松村浩幸永井广明
Owner SUMITOMO RIKO CO LTD