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CN111801515A - 张紧器 - Google Patents

张紧器 Download PDF

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Publication number
CN111801515A
CN111801515A CN201980016910.XA CN201980016910A CN111801515A CN 111801515 A CN111801515 A CN 111801515A CN 201980016910 A CN201980016910 A CN 201980016910A CN 111801515 A CN111801515 A CN 111801515A
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China
Prior art keywords
tensioner
base
ptfe
damping shoe
pivot arm
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Pending
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CN201980016910.XA
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English (en)
Inventor
S·辛格
M·J·科佩希尔
A·K·巴拉
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Gates Corp
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Gates Corp
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Publication of CN111801515A publication Critical patent/CN111801515A/zh
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H7/0829—Means for varying tension of belts, ropes or chains  with vibration damping means
    • F16H7/0831—Means for varying tension of belts, ropes or chains  with vibration damping means of the dry friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H7/10—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1218—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley with vibration damping means of the dry friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0802—Actuators for final output members
    • F16H2007/081—Torsion springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0819—Rubber or other elastic materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H7/0829—Means for varying tension of belts, ropes or chains  with vibration damping means
    • F16H2007/084—Means for varying tension of belts, ropes or chains  with vibration damping means having vibration damping characteristics dependent on the moving direction of the tensioner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0865—Pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0893—Circular path

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

一种张紧器，所述张紧器包括：基部；枢转臂，所述枢转臂枢转地接合所述基部；带轮，所述带轮轴颈连接到所述枢转臂；推动所述枢转臂的扭力弹簧，所述扭力弹簧在退绕方向上加载，所述扭力弹簧与阻尼瓦接合，所述阻尼瓦与所述基部摩擦接合，并且所述阻尼瓦具有包括PTFE的阻尼瓦部分，所述PTFE混合在塑料基体材料内，所述PTFE按重量占所述塑料基体材料的2％至4％。

Description

张紧器
技术领域
本发明涉及一种张紧器，更具体地，本发明涉及一种具有阻尼瓦的张紧器，该阻尼瓦包括混合在塑料基体材料内的PTFE，该PTFE按重量占塑料基体材料的约2％至4％。
背景技术
用于柔性驱动系统，特别是用于在内燃机上的包括辅助驱动系统的柔性驱动系统的张紧器众所周知。这种张紧器包括向柔性驱动器偏压的带轮，所述柔性驱动器通常是橡胶带。带轮被安装到枢转臂，该枢转臂通过弹簧被偏压向柔性驱动器(张紧方向)，并且枢转臂还可以包括产生阻尼力的装置，以便抑制枢转臂和/或柔性驱动器的振荡。提供摩擦阻尼的现有技术的张紧器通常使用由诸如塑料或金属的材料制成的阻尼机构来提供摩擦力。
在现有技术的张紧器的枢转臂上使用的衬套可以使用PTFE来促进运动。
现有技术的代表是US 8,142,314，其公开了一种张紧器，该张紧器采用了主轴和张紧器臂，优选地，该主轴和张紧器臂通过诸如压铸的合适制造工艺来制造，而无需进行机加工操作。与类似的缠绕有圆形横截面的线的弹簧相比，该张紧器的偏压弹簧缠绕有非圆形横截面的线以增加弹簧的弹簧力，并且当张紧器臂运动远离柔性驱动器时，偏压弹簧的直径扩大并且线圈将阻尼瓦压紧成与张紧器臂的壁相接触，从而产生阻尼力。该张紧器易于组装，并且需要相对较小的封装体积以产生张紧力。
所需要的是这样一种张紧器，该张紧器具有阻尼瓦，该阻尼瓦包括混合在塑料基体材料内的PTFE，所述PTFE按重量占所述塑料基体材料的大约2％至4％。本发明满足了这一需求。
发明内容
本发明的主要方面是提供一种张紧器，所述张紧器具有阻尼瓦，该阻尼瓦包括混合在塑料基体材料中的PTFE，该PTFE按重量占所述塑料基体材料的2％至4％。
通过本发明的以下描述和附图，将指出本发明的其他方面或使本发明的其他方面变得显而易见。
本发明包括一种张紧器，该张紧器包括：基部；与所述基部枢转接合的枢转臂；轴颈连接到所述枢转臂的带轮；推动所述枢转臂的扭力弹簧，所述扭力弹簧在退绕方向上加载，所述扭力弹簧与所述阻尼瓦接合，所述阻尼瓦摩擦地接合所述基部，所述阻尼瓦具有包括PTFE的阻尼瓦部分，该PTFE混合在塑料基体材料内，该PTFE按重量占所述塑料基质材料的2％至4％。
附图说明
结合在说明书中并构成说明书一部分的附图示出了本发明的优选实施例，并且与说明书一起用于解释本发明的原理。
图1是分解视图；
图2是横截面视图；
图3是平面图；
图4是阻尼瓦的透视图；
图5是阻尼瓦的透视图；
图6是摩擦表面的示意图。
具体实施方式
图1是分解视图。张紧器包括基部10、枢转臂20、带轮30和扭力弹簧40。带轮30在轴承31上轴颈连接到枢转臂20。螺栓33将轴承31附接至接收部分21。轴13将枢转臂20附接至基部10。枢转臂20围绕轴13在衬套14上枢转。
扭力弹簧40的端部42接合基部10。扭力弹簧40的端部41接合阻尼瓦50。阻尼瓦50的摩擦表面垫53摩擦地接合基部10的内表面15。
图2是横截面视图。扭力弹簧40的端部41将阻尼瓦50压入表面15。摩擦力取决于垫53和表面15之间的摩擦系数以及弹簧40所施加的法向力。对枢转臂的振荡运动的阻尼通过产生的摩擦力来实现。扭力弹簧40沿退绕方向加载，从而使弹簧40的直径径向扩展。
图3是平面图。法向反作用力(NR)与弹簧接触(SC)反作用力相反。孔12接收用于将张紧器安装到安装表面(未示出)的螺栓(未示出)。
图4是阻尼瓦的透视图。阻尼瓦50包括摩擦表面垫53。垫53通过互锁部分54而锁定到主体51。接收部分52接合扭力弹簧40的端部41。垫53包括尼龙66基体。
图5是阻尼瓦的透视图。垫53具有拱形形状以接合基部10的表面15。主体51通常是塑料，但是也可以包括金属或陶瓷材料。
图6是摩擦表面的示意图。在瓦53的模制过程中，将PTFE 60与垫基体材料均匀混合。该基体材料可以包括尼龙66或其他类似的塑料材料。PTFE通常是惰性的并且与本领域已知的大多数形式的塑料相容。垫53中的PTFE含量处于按重量计约2％至4％的范围内。垫53中的PTFE 60增强了该阻尼机构的抗粘性能，例如，在存在像水这样的流体时。
在操作和磨合期间，垫53轻微磨损，然后其暴露出垫53的表面上的PTFE。暴露的PTFE层61磨损并发生剪切以形成润滑表面，以便增强在存在流体的条件下的抗粘性能。
抗粘性能与摩擦接合并不相似。垫53摩擦地接合表面15，从而抑制枢转臂20的运动。即使如此，层61也不会减弱接合的摩擦特性；其只是减少或防止了在操作过程中可能发生的粘滑(stick-slip)现象。
粘滑可被描述为在粘附到彼此与在彼此之上滑动之间发生交替的表面。通常，在两个表面之间的静摩擦系数大于动摩擦系数。如果所施加的力大到足以以克服静摩擦，则将摩擦减小到动摩擦会导致两个表面的相对运动速度发生突跳(sudden jump)。
随着张紧器运行，PTFE膜也沉积在表面15上。沉积的PTFE膜减少了表面15上的磨损，从而延长了张紧器的使用寿命。
尽管本文已经描述了本发明的形式，但是对于本领域技术人员而言将显而易见的是，在不脱离本文描述的本发明的精神和范围的情况下，可以对方法以及部件的构造和关系进行改变。

Claims (5)

1.一种张紧器，所述张紧器包括：
基部；
枢转臂，所述枢转臂与所述基部枢转地接合；
带轮，所述带轮轴颈连接到所述枢转臂；
推动所述枢转臂的扭力弹簧，所述扭力弹簧在退绕方向上加载；
所述扭力弹簧与阻尼瓦接合，所述阻尼瓦摩擦地接合所述基部；并且
所述阻尼瓦具有包括PTFE的阻尼瓦部分，所述PTFE混合在塑料基体材料内，所述PTFE按重量占所述塑料基体材料的2％至4％。
2.根据权利要求1所述的张紧器，其中，所述塑料基体材料包括尼龙66。
3.根据权利要求1所述的张紧器，其中，所述阻尼瓦接合所述基部的径向内表面，所述径向内表面从所述阻尼瓦接收PTFE的膜。
4.根据权利要求1所述的张紧器，其中，所述基部还包括安装孔。
5.根据权利要求1所述的张紧器，其中，所述阻尼瓦部分具有用于接合所述基部的拱形形状。
CN201980016910.XA 2018-02-14 2019-02-08 张紧器 Pending CN111801515A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US15/896,869 2018-02-14
US15/896,869 US10683914B2 (en) 2018-02-14 2018-02-14 Tensioner
PCT/US2019/017293 WO2019160764A1 (en) 2018-02-14 2019-02-08 Tensioner

Publications (1)

Publication Number Publication Date
CN111801515A true CN111801515A (zh) 2020-10-20

Family

ID=65520458

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Application Number Title Priority Date Filing Date
CN201980016910.XA Pending CN111801515A (zh) 2018-02-14 2019-02-08 张紧器

Country Status (9)

Country Link
US (1) US10683914B2 (zh)
EP (1) EP3752753A1 (zh)
JP (1) JP7096344B2 (zh)
KR (1) KR102449380B1 (zh)
CN (1) CN111801515A (zh)
CA (1) CA3091124C (zh)
MX (1) MX2020008514A (zh)
RU (1) RU2741974C1 (zh)
WO (1) WO2019160764A1 (zh)

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JP2021513635A (ja) 2021-05-27
BR112020016527A2 (pt) 2020-12-15
RU2741974C1 (ru) 2021-02-01
EP3752753A1 (en) 2020-12-23
MX2020008514A (es) 2020-11-11
CA3091124A1 (en) 2019-08-22
KR102449380B1 (ko) 2022-09-29
US10683914B2 (en) 2020-06-16
US20190249758A1 (en) 2019-08-15
WO2019160764A1 (en) 2019-08-22
KR20200116520A (ko) 2020-10-12
CA3091124C (en) 2023-09-19
JP7096344B2 (ja) 2022-07-05

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