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    • 40. 发明授权
    • Tensioning device for chain or belt drives
    • 用于链条或皮带传动的张紧装置
    • US4985009A
    • 1991-01-15
    • US528030
    • 1990-05-23
    • Dieter SchmidtBolko Schuseil
    • Dieter SchmidtBolko Schuseil
    • F16F9/52F16F9/50F16H7/08F16H7/12
    • F16H7/08F16F9/50F16H7/0848F16H7/1236F16H2007/0806F16H2007/0812F16H2007/0855F16H2007/0859F16H2007/0891
    • A tensioning device for chain or belt drives comprising a damping piston guided in a cylindrical housing and loaded in the chain tensioning direction by a compression spring located in the housing, wherein a high pressure chamber for hydraulic fluid is situated between the housing bottom and the damping piston and is open via a leakage gap formed by the guide bore of the housing and the damping piston and closed with respect to an oil reservoir by a non-return valve, the hydraulic pressure in the high pressure chamber during the operation of the tensioning device being higher in the cold state than in the heated state due to differences in viscosity, characterized in that the high pressure chamber is delimited by an additional piston acting as an overpressure piston on which a second compression spring acts in the direction of the high pressure chamber, the overpressure piston being able to bear against a fixed stop and the spring force of the second compression spring and the effective surface of the overpressure piston are so dimensioned that in the cold state, the overpressure piston is displaceable by the force applied to it by the hydraulic pressure and in the heated state, it is retained at the fixed stop by the second compression spring.
    • 一种用于链条或皮带驱动器的张紧装置,包括在圆柱形壳体中引导并通过位于壳体中的压缩弹簧沿链条张紧方向装载的阻尼活塞,其中用于液压流体的高压室位于壳体底部和阻尼 活塞,并且通过由壳体的导向孔和阻尼活塞形成的泄漏间隙打开,并且通过止回阀相对于储油器封闭,在张紧装置的操作期间高压室中的液压 由于粘度差异,在冷态下比在加热状态下高,其特征在于,高压室由作为过压活塞的附加活塞限定,第二压缩弹簧在其上沿高压室的方向 ,超压活塞能够抵靠固定止动件和第二压缩弹簧的弹簧力并且具有效果 超压活塞的表面的尺寸尺寸使得在冷态中,超压活塞可以通过液压和加热状态施加到其上的力来移动,它通过第二压缩弹簧保持在固定止动件上。