公开(公告)号：US20090131208A1

公开(公告)日：2009-05-21

申请号：US11910783

申请日：2006-04-06

申请人： Chris D. Hawryluck ,  Donavan R. Chambers ,  Gary J. Spicer ,  Larry J. Ferriman ,  Christiaan Vander Ploeg

发明人： Chris D. Hawryluck ,  Donavan R. Chambers ,  Gary J. Spicer ,  Larry J. Ferriman ,  Christiaan Vander Ploeg

IPC分类号： F16H7/12

CPC分类号： F16H7/1218 ,  F16H7/1281 ,  F16H2007/081

摘要： A tensioner for tensioning a flexible drive means is disclosed which has fewer components than comparable prior art tensioners. The tensioner is less expensive to manufacture and assemble and is easily installed. The tensioner includes a tensioner arm molded from a suitable plastic material and a pivot bushing formed from a different material, the pivot bushing preferably being over molded about the tensioner arm. The pivot bushing and tensioner arm include a series of longitudinal slots to form fingers from the tensioner arm and pivot bushing, the fingers engaging the pivot surface of the pivot shaft about which the arm pivots. A coil spring is used to bias a rotatable member on the tensioner arm into contact with the flexible drive means to be tensioned and a portion of the coil spring engages the fingers to squeeze them to increase the frictional force between the pivot bushing and the pivot surface to dampen the tensioner when the tensioner arm is moved in one direction. A unique thermal management system is also disclosed which employs thermal insulating coatings and thermal dispersant coatings to manage the temperature of the tensioner arm to enhance its expected operating lifetime.

摘要翻译： 公开了用于张紧柔性驱动装置的张紧器，其具有比可比现有技术张紧器更少的部件。 张紧器制造和组装成本较低，易于安装。 张紧器包括由合适的塑料材料模制的张紧器臂和由不同材料形成的枢轴衬套，枢转衬套优选地围绕张紧器臂模制。 枢轴衬套和张紧器臂包括一系列纵向狭槽，以从张紧器臂和枢转衬套形成指状物，手指接合臂枢转的枢转轴的枢转表面。 螺旋弹簧用于将张紧器臂上的可旋转构件偏置成与柔性驱动装置接触以被张紧，并且螺旋弹簧的一部分接合手指以挤压它们以增加枢转衬套和枢转表面之间的摩擦力 以便在张紧器臂沿一个方向移动时抑制张紧器。 还公开了独特的热管理系统，其采用绝热涂层和热分散剂涂层来管理张紧器臂的温度以增强其预期的使用寿命。