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公开(公告)号：US20150275976A1
公开(公告)日：2015-10-01
申请号：US14438233
申请日：2013-10-23
Applicant: NTN CORPORATION
Inventor： Tadahisa Tanaka , Seiji Sato , Takehiro Takano
CPC classification number: F16C33/74 , F16C2361/63 , F16H7/12 , F16H7/1281 , F16H2007/0893
Abstract: In a fulcrum bearing device for a pulley arm, a sleeve is inserted in a shaft hole formed in a boss portion of a pulley arm, washers are fitted on the outer peripheries of small diameter tube portions formed at the respective end portions of the sleeve, and the sleeve is fixed to an engine block by means of a bolt inserted through the sleeve and tightened, so that the pulley arm is pivotally supported. The shaft hole is formed at its respective end portions with seal receiving recesses having large diameters. Each seal member includes a cylindrical portion provided on its outer peripheral portion and press-fitted in the seal receiving recess, and a radial lip extending obliquely inwardly and provided on the inner periphery of the seal member. The distal end portions of the radial lips are kept in elastic contact with the outer diameter surface of the sleeve.
Abstract translation: 在用于带轮臂的支点支承装置中，套筒插入形成在带轮臂的凸起部分的轴孔中，垫圈安装在形成在套筒的各个端部处的小直径管部分的外周， 并且通过插入穿过套筒的螺栓将套筒固定到发动机缸体上并被紧固，使得滑轮臂被枢转地支撑。 轴孔在其各自的端部处形成有具有大直径的密封接收凹部。 每个密封构件包括设置在其外周部分上并压配合在密封件容纳凹部中的圆柱形部分，以及倾斜向内延伸并设置在密封构件的内周上的径向唇缘。 径向唇缘的远端部分与套筒的外径表面保持弹性接触。
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公开(公告)号：US10550916B2
公开(公告)日：2020-02-04
申请号：US15514960
申请日：2015-09-28
Applicant: NTN CORPORATION
Inventor： Tasuku Furukawa , Seiji Sato
Abstract: A chain tensioner includes an oil supply passage for supplying hydraulic oil into a pressure chamber defined by a cylinder and a plunger, and a check valve provided at the end of the oil supply passage. A leak gap is defined between the sliding surfaces of the cylinder and the plunger. The plunger is biased by a return spring in the direction in which the plunger protrudes out of the cylinder. A plug is press-fitted in a cylindrical inner periphery of a through hole formed in the plunger to extend from a protruding end surface of the plunger to the pressure chamber to define an air vent passage. It is possible to change the hydraulic damper force simply by replacing the plug with another different type of plug to define a different air vent passage.
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