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1.发明公开公开(公告)号：US20240102523A1
公开(公告)日：2024-03-28
申请号：US18266415
申请日：2021-12-09
申请人： HITACHI ASTEMO, LTD.
发明人： Takahito OSADA , Kimiyasu KONO
CPC分类号： F16D65/0068 , F16D65/02 , F16D2065/13 , F16D2250/0007
摘要： Provided is a disc brake including a brake caliper. The brake caliper has a first bridge part positioned on a first pin disposition part side and on which a sprue mark formed at the time of casting a caliper main body part is provided, and a second bridge part positioned on a second pin disposition part side. The brake caliper has a shape in which a moment of inertia of area of the caliper main body part on the first bridge part side is larger than a moment of inertia of area of the caliper main body part on the second bridge part side when the caliper main body part is divided by a straight line that bisects a line segment connecting a center of the first pin disposition part and a center of the second pin disposition part when viewed from an axial direction of a disc.
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公开(公告)号：US20220056972A1
公开(公告)日：2022-02-24
申请号：US17416896
申请日：2019-12-02
申请人： Hitachi Astemo, Ltd.
发明人： Takahito OSADA , Shigeru HAYASHI , Shinya WATANABE
摘要： A disc brake including: a piston; a cylinder including a bore portion, which movably accommodates the piston, and a step portion formed on an opening end side of the bore portion; and a piston boot arranged between a tip side of the piston and a small diameter step portion of the cylinder. The piston boot includes: a large diameter annular fitting portion containing an annular metal member so as to be fitted to the small diameter step portion; a bellows portion, which extends from the large diameter fitting portion, is increased in its diameter from the large diameter fitting portion to an outer peripheral side, and is also deformed and extended from the large diameter fitting portion toward an inner peripheral side; and a small diameter fitting portion formed at an end portion of the bellows portion so as to fit to an outer periphery of the piston.
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