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    • 47. 发明授权
    • Tensioning device for traction systems such as belts and chains
    • 用于牵引系统的张紧装置,例如皮带和链条
    • US6039664A
    • 2000-03-21
    • US973978
    • 1997-12-15
    • Michael Schmid
    • Michael Schmid
    • F16H7/08F16H7/12
    • F16C33/74F16C11/04F16C17/10F16H7/1281F16H2007/0806F16H2007/0893
    • A tensioner for traction elements such as belts and chains comprises a tension lever (2) on which is arranged a tension roller (3) for the traction element. A mounting lug (5) of the tension lever (2) is pivoted by a radial bearing (13) on an axle (6) provided on an engine block (4), while axial stops (8) are arranged on both ends of the mounting lug (5). The tensioner further comprises a tension spring element (1) which acts at one end on the tension lever (2) and at a second end on the engine block. To prevent rattling noises which result from axial displacements of the tension lever (2), the invention provides the arrangement of sealing rings (12) on the two axial ends of the mounting lug (5), which sealing rings (12) seal the radial bearing (13) at its front ends while projecting axially beyond the end surfaces of the mounting lug (5), the axial distance between the axial stops (8) being larger than the axial distance between the end surfaces of the sealing rings (12).
    • PCT No.PCT / EP96 / 01050 Sec。 371 1997年12月15日第 102(e)1997年12月15日日期PCT 1996年3月12日PCT公布。 出版物WO97 / 01717 日期1997年1月16日用于诸如皮带和链条之类的牵引元件的张紧器包括张力杆(2),在该张力杆上布置有用于牵引元件的张紧辊(3)。 张力杆(2)的安装凸缘(5)由设置在发动机缸体(4)上的轴(6)上的径向轴承(13)枢转,而轴向止动件(8)设置在发动机缸体 安装凸耳(5)。 张紧器还包括拉伸弹簧元件(1),其在一端作用在张力杆(2)上,第二端作用在发动机缸体上。 为了防止由于张力杆(2)的轴向位移而产生的晃动噪声,本发明提供了在安装凸缘(5)的两个轴向端部上的密封环(12)的布置,该密封环(12)密封径向 轴承(13)在其前端轴向突出超过安装凸耳(5)的端面,轴向止动件(8)之间的轴向距离大于密封环(12)的端面之间的轴向距离, 。