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    • 2. 发明公开
    • CHAIN TENSIONER
    • 链条张紧器
    • EP3173664A1
    • 2017-05-31
    • EP15824920.1
    • 2015-07-13
    • NTN Corporation
    • ONIMARU, KouichiFURUKAWA, Tasuku
    • F16H7/08
    • F16H7/0848F15B21/044F16H7/08F16H7/0834F16H2007/0808F16H2007/0817F16H2007/0859F16H2007/0891
    • A chain tensioner is provided which is configured such that the air remaining in a pressure chamber can be discharged to the outside of the chain tensioner through a helical gap (22) defined between the threadedly engaged portions of a screw (20) and a threaded hole (18), and through between circumferentially separate radial ends (24) of a spring washer (21) mounted between the screw (20) and a housing (10). The chain tensioner includes an air discharge groove or grooves (25) formed in the seat surface (20b) of the head (20a) of the screw (20) such that an annular space (23) defined between the outer diameter surface of the neck (20c) of the screw (20) and the inner diameter surface of the spring washer (21) communicates with the outside through the air discharge groove or grooves (25). Even if foreign objects clog the space between the separate radial ends (24) of the spring washer (21) so as to hinder air from being discharged through between the separate radial ends (24), the air remaining in the pressure chamber can be discharged to the outside through the air discharge groove or grooves (25).
    • 提供一种链条张紧器,该链条张紧器构造成使得留在压力室中的空气能够通过在螺钉(20)的螺纹接合部分和螺纹孔(22)之间限定的螺旋间隙(22)排出到链条张紧器的外部 (18),并穿过安装在螺钉(20)和壳体(10)之间的弹簧垫圈(21)的圆周分离的径向端部(24)之间。 链条张紧器包括形成在螺钉(20)的头部(20a)的座表面(20b)中的排气槽(25),使得限定在颈部的外径表面之间的环形空间(23) (20)的内表面(20c)和弹簧垫圈(21)的内径表面通过排气槽(25)与外部连通。 即使异物堵塞弹簧垫圈(21)的各径向端部(24)之间的空间以阻碍空气通过分开的径向端部(24)之间排出,仍可将残留在压力室中的空气排出 通过一个或多个排气槽(25)排出到外部。