公开(公告)号：US07040468B2

公开(公告)日：2006-05-09

申请号：US10646780

申请日：2003-08-25

Applicant: Ryo Shinata

Inventor： Ryo Shinata

IPC: F16F9/348

CPC classification number: F16F9/3405 ,  F16F9/348

Abstract: A hydraulic shock absorber includes a cylindrical housing within which a piston assembly is slidably received. The piston assembly includes a piston element connected to a piston rod and adapted to divide an interior of the housing into compression and rebound chambers. The piston element has compression and rebound passages to provide fluid communication between the compression and rebound chambers. A valve assembly includes a first valve disc positioned on a lower side of the piston element, and a second valve disc retained on the first valve disc. The second valve disc includes apertures arranged in a circumferentially spaced relationship and are selectively openable and closeable by the first valve disc. A third valve disc is retained on the second valve disc and has notches arranged in a circumferentially spaced relationship. The notches cooperate with the apertures to collectively form ports. The ports are communicated with the compression chamber. A fourth valve disc cooperates with the second valve disc to sandwich the third valve disc so that restrictive orifices are defined in an outer end of the notches. Each of the ports has a cross sectional area greater than that of the restrictive orifices regardless of a relative angular position between the second and third valve discs.

Abstract translation: 液压减震器包括圆柱形壳体，活塞组件可滑动地容纳在该圆柱形壳体内。 活塞组件包括连接到活塞杆并适于将壳体的内部分成压缩和回弹室的活塞元件。 活塞元件具有压缩和回弹通道，以在压缩室和回弹室之间提供流体连通。 阀组件包括位于活塞元件下侧的第一阀盘和保持在第一阀盘上的第二阀盘。 第二阀盘包括以周向间隔开的关系布置的孔，并且可由第一阀盘选择性地打开和关闭。 第三阀盘被保持在第二阀盘上并且具有以周向间隔开的关系布置的凹口。 凹口与孔组合以共同形成端口。 端口与压缩室连通。 第四阀盘与第二阀盘配合以夹住第三阀盘，使得限制孔限定在凹口的外端。 每个端口的横截面面积大于限制孔口的横截面积，而与第二和第三阀盘之间的相对角位置无关。