CN107835907A - 具有二次阻尼的张紧器 - Google Patents
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- 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
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- 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
- F16H7/0838—Means for varying tension of belts, ropes, or chains with vibration damping means of the dissipating material type, e.g. elastomeric spring
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- 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
- F16H7/1245—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 dissipating material type, e.g. elastomeric spring
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- F16H7/08—Means for varying tension of belts, ropes, or chains
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- 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
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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
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0865—Pulleys
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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
- F16H2007/0889—Path of movement of the finally actuated member
- F16H2007/0893—Circular path
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Abstract
一种张紧器,包括:轴(2);基部(4);与所述基部枢转接合的枢转臂(11);轴颈安装到枢转臂上的带轮(12);第一弹簧(5),其迫使第一阻尼部件(6)与所述枢转臂摩擦接合,所述第一弹簧与所述基部接合,所述第一阻尼部件施加在第一枢转臂方向大于在第二枢转臂方向的阻尼力;以及第二弹簧(9),其布置在所述枢转臂中,并迫使第二阻尼部件(10)与基部表面(42)摩擦接合,所述基部表面包括弓形形状,该弓形形状的半径从最小值变化到最大值。
Description
技术领域
本发明涉及一种张紧器,更特别地涉及一种具有接合枢转臂的第一阻尼部件和接合基部的第二阻尼部件的张紧器。
背景技术
用于汽车等的大部分发动机包括多个皮带传动附件系统,其对于车辆的正常操作是必不可少的。附件系统可包括交流发电机、空调压缩机和动力转向泵。
附件系统通常安装在发动机的前表面上。每个附件具有安装到轴上的皮带轮,用于从某种形式的皮带传动装置接收动力。在早先的系统中,每个附件由单独的皮带驱动,所述皮带在附件和曲轴之间运行。由于皮带技术的改进,现在在大多数应用中基本使用单个蛇形皮带。单个蛇形皮带在驱动附件的各个附件部件中按路线设置。发动机曲轴驱动蛇形皮带。
由于蛇形皮带必须按路线经过所有附件,因此其通常比其前身(predecessor)要长。为正确操作,以预定的张紧力安装皮带。在皮带工作时,在其整个长度略微拉伸。这导致皮带张力减小,其可能引起皮带打滑。因此,皮带张紧器用于在皮带期间拉伸时维持正常的皮带张力。
在皮带张紧器工作时,运行的皮带可引起张紧器弹簧中的摆动。这些摆动是不期望的,因为其引起皮带和张机器的过早磨损。因此,在张紧器中增加阻尼机构以阻尼工作摆动。
已经开发出各种阻尼机构。它们包括粘性流体阻尼器、基于相对滑动或相互作用的摩擦表面的机构,和使用一系列相互作用弹簧的阻尼器。这些阻尼机构大部分通过抵抗皮带沿一个方向的运动而沿单个方向工作。这通常导致工作期间存在于皮带中的无阻尼的振动,这是因为张紧器臂在加载位置和卸载位置之间摆动。
现有技术的代表是US专利No.6,609,988,其公开了用于发动机上的皮带传动装置的不对称的阻尼张紧器系统。皮带连接在曲轴上的驱动皮带轮与任意数目的从动皮带轮之间。每个从动皮带轮连接到附件,例如交流发电机、动力转向泵、压缩机或类似物。张紧器沿皮带运动方向在起显著作用的惯量的第一分量之前设置在任何位置。张紧器中的偏压部件用于位置皮带中的张力。张紧器还包括阻尼机构,用于阻尼由发动机的操作引起的皮带的振动。张紧器阻尼摩擦是不等的或不对称的,取决于张紧器比的运动方向。在加速期间,张紧器在卸载方向上的阻尼摩擦显著低于在相反的方向或加载方向上的阻尼摩擦,在减速期间也是这种情况。加速期间较低的阻尼摩擦使得张紧器臂能够根据加速引起的皮带长度增加而快速调节。在减速期间,较高的阻尼摩擦防止张紧器臂沿加载方向移动太远从而引起打滑和噪音。不对称阻尼还在工作的所有阶段期间显著减小皮带中的整体振动。
需要一种张紧器,其具有接合枢转臂的第一阻尼部件和接合基部的第二阻尼部件。本发明满足该要求。
发明内容
本发明的主要方面是一种张紧器,其具有接合枢转臂的第一阻尼部件和接合基部的第二阻尼部件。
将通过对本发明的以下描述以及附图指出本发明的其它方面或者使本发明的其它方面显而易见。
本发明包括一种张紧器,包括:轴,基部,与所述基部枢转接合的枢转臂,轴颈安装到枢转臂上的带轮,第一弹簧,其迫使第一阻尼部件与所述枢转臂摩擦接合,所述第一弹簧与所述基部接合,所述第一阻尼部件施加在第一枢转臂方向大于在第二枢转臂方向的阻尼力,以及第二弹簧,其布置在所述枢转臂中,并迫使第二阻尼部件与基部表面摩擦接合,所述基部表面包括弓形形状,该弓形形状的半径从最小值变化到最大值。
附图说明
被并入本说明书并构成本说明书的一部分的附图示例说明了本发明的优选实施例,并且连同以下描述共同用来解释说明本发明的原理。
图1为张紧器的前立体图。
图2为张紧器的后立体图。
图3为张紧器的后平面图。
图4为张紧器的前分解视图。
图5为张紧器的后分解视图。
图6为阻尼扭矩和弹簧力的图表。
图7为阻尼扭矩与臂角度的图表。
图8为弹簧罩的细节图。
图9为基部的平面图。
图10为表面42的轮廓。
图11为第一阻尼部件的平面图。
具体实施方式
图1是张紧器的前立体图。张紧器100包括枢转安装到基部4上的枢转臂11。皮带轮12轴颈安装到枢转臂11。皮带轮12可接合多肋皮带或V型带。凸杆41用于将张紧器基部附接到例如车辆发动机(未示出)的安装表面上。凸杆41接收例如螺栓(未示出)的紧固件。
图2是张紧器的后立体图。折叠弹簧(accordion spring)9布置在腔110中。腔110在枢转臂11内。弹簧9支承在阻尼部件10上。弹簧9是压缩型弹簧,弹簧刚度例如为177N/mm。阻尼部件10布置在腔110中。阻尼部件10完全包含在枢转臂4中。
阻尼部件10的弓形表面101摩擦接合基部4的表面42。表面42与表面101之间的摩擦接合阻尼枢转臂11相对于基部4的摆动运动。罩8通过螺钉7附接到枢转臂11上。螺钉7接合孔111。插塞1用于防止杂质进入张紧器。枢转轴2用作枢转臂11的枢轴。
图3是张紧器的后平面图。枢转臂11接合止动件44,该止动件限定臂11行进的极限。阻尼部件10的弓形表面101摩擦接合基部4的表面42。参见图9和10,表面42具有凸轮轮廓,这意味着表面42的半径R1沿围绕基部的圆周方向从较小值平滑变化到较大值。表面42的凸轮轮廓具有的作用是,根据枢转臂11在其枢转运动的弧上的位置增加或减小由阻尼部件10产生的阻尼力。
图4是张紧器的前分解视图。枢转臂11压配合到轴2。枢转套筒3容纳在基部4中。套筒3允许轴2在基部4中枢转。弹簧5的一端52接合基部4。弹簧5的另一端51接合阻尼机构6。弹簧5是扭力弹簧。
基部4包括由阻尼部件10接合的弓形表面42。在枢转臂11运动远离皮带时,通过使得弹簧9压缩增加来自折叠弹簧9的载荷,表面42增加阻尼部件10施加的阻尼的量。通过使得部件10的侧部与枢转臂腔110接合,阻尼部件10阻尼枢转臂的运动。
阻尼部件10的摩擦表面101接合基部4的表面42。可通过改变弹簧9的弹簧刚度调节阻尼部件10产生的阻尼力。摩擦力(阻尼)是法力(N)和摩擦系数(μ)的乘积。
图5是张紧器的后分解视图。阻尼部件6的摩擦表面61接合臂11的内表面112。阻尼部件6在臂11上施加的阻尼力在第一枢转臂方向上(加载)大于在第二枢转臂方向上(卸载),即阻尼不对称。
参考图11,阻尼部件6在端部51接合扭力弹簧5。图11是第一阻尼部件的平面图。阻尼部件6还包括用于与枢转臂表面112接合的外弓形摩擦表面61。阻尼部件6包括可操作地连接到弹簧端51的第一弹簧触点80和第二弹簧触点82。阻尼部件6包括用于接收弹簧端51的槽道62。阻尼部件6如图所示具有弓形形状。
还示出作用于阻尼部件的力。第一阻尼力TL沿离开皮带的第一方向作用于枢转臂11的运动,第二阻尼力TUN沿朝向环形部件的第二方向作用于枢转臂的运动,第一阻尼力大于第二阻尼力。
在静止位置,扭力弹簧5的弹簧扭矩Tspr在第一和第二触点80、82上产生反作用力N1和N2。弹簧的另一端接合受约束不能旋转的基部4,产生扭矩。阻尼机构6通过端部51基本上约束在相对于枢转臂的预定位置中。
μTL大于μTun。μ是表面61和表面112之间的摩擦系数。TL是加载方向上的扭矩。TUN是卸载方向上的扭矩。
图6是阻尼扭矩和弹簧力的图表。随着臂11从初始开始位置旋转到与皮带(未示出)接合,示出第一阻尼部件6和第二阻尼部件10的效果。
图7是在有和没有二次阻尼机构的情况下,阻尼扭矩与臂角度的图表。可见当与由于与第二阻尼部件(B)结合而形成的滞后比较时,对于单个阻尼部件(A)来说,扭矩显著较小。
图8是弹簧罩的细节图。罩8包括刷部分81。刷部分81起到密封件的作用,用于防止杂质进入腔110和阻尼部件10中。部分81接合基部4外部。螺钉7接合孔82。
图9是基部的平面图。表面42是在外部布置在基部4上的弓形表面。半径R1沿圆周方向从止动件44处的最小值逐渐增加到如箭头所示的最大值。如果需要,表面42的斜度也可以从箭头处的最小值变化到止动件44处的最大值。止动件44的位置对于表面42的位置并不是重要的,其在这里仅仅被作为方便参考。接收部分45接合弹簧5的端部52,从而防止弹簧5围绕轴2旋转。
图10是表面42的轮廓。例如,在本实施例中,表面42的半径R1在约180°上具有4mm增量。该轮廓仅仅是个例子,用于表面42的其它轮廓也可以符合使用者要求。每个轮廓将决定阻尼部件10所表现出的阻尼特性。半径R1是相对于枢转臂的枢转轴线。该枢转轴线是轴2的中心。
虽然已经在本文中描述了本发明的一种形式,但是对于本发明所属领域的技术人员而言,将是显而易见的是,可在部件和方法的构造以及关系方面进行变化而不脱离在本文中所描述的本发明的精神和范围。
Claims (6)
1.一种张紧器,包括:
轴(2);
基部(4);
与所述基部枢转接合的枢转臂(11);
轴颈安装到枢转臂上的带轮(12);
第一弹簧(5),其迫使第一阻尼部件(6)与所述枢转臂摩擦接合,所述第一弹簧与所述基部接合,所述第一阻尼部件施加在第一枢转臂方向大于在第二枢转臂方向的阻尼力;以及
第二弹簧(9),其布置在所述枢转臂中,并迫使第二阻尼部件(10)与基部的表面(42)摩擦接合,所述基部的表面包括弓形形状,该弓形形状的半径(R1)从最小值变化到最大值。
2.根据权利要求1所述的张紧器,其特征在于,所述第一弹簧是扭力弹簧。
3.根据权利要求1所述的张紧器,其特征在于,所述第二弹簧是压缩弹簧。
4.根据权利要求1所述的张紧器,其特征在于,所述第二阻尼部件和第二弹簧布置在所述枢转臂中。
5.根据权利要求4所述的张紧器,还包括在所述第二阻尼部件上的罩。
6.根据权利要求5所述的张紧器,其特征在于,所述罩还包括刷部分。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US14/797,559 US9618099B2 (en) | 2015-07-13 | 2015-07-13 | Tensioner with secondary damping |
US14/797,559 | 2015-07-13 | ||
PCT/US2016/041273 WO2017011259A1 (en) | 2015-07-13 | 2016-07-07 | Tensioner with secondary damping |
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CN107835907A true CN107835907A (zh) | 2018-03-23 |
CN107835907B CN107835907B (zh) | 2020-07-17 |
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US (1) | US9618099B2 (zh) |
EP (1) | EP3322918B1 (zh) |
JP (1) | JP6532592B2 (zh) |
KR (1) | KR101979555B1 (zh) |
CN (1) | CN107835907B (zh) |
AU (1) | AU2016294331B2 (zh) |
BR (1) | BR112018000790B1 (zh) |
CA (1) | CA2992308C (zh) |
MX (1) | MX2018000481A (zh) |
RU (1) | RU2018105104A (zh) |
WO (1) | WO2017011259A1 (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111120598A (zh) * | 2018-11-01 | 2020-05-08 | 上海汽车集团股份有限公司 | 一种发动机及其皮带张紧器 |
CN112204272A (zh) * | 2018-03-27 | 2021-01-08 | 盖茨公司 | 张紧器 |
CN112888877A (zh) * | 2018-10-23 | 2021-06-01 | 盖茨公司 | 张紧器 |
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US10995829B2 (en) | 2017-06-16 | 2021-05-04 | Gates Corporation | Tensioner |
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KR102385252B1 (ko) * | 2018-12-03 | 2022-04-08 | 게이츠 코포레이션 | 텐셔너 |
US11499607B2 (en) * | 2019-04-25 | 2022-11-15 | Johnson Controls Tyco IP Holdings LLP | Drive belt tensioner systems and methods |
DE102020004335A1 (de) * | 2020-07-20 | 2022-01-20 | Muhr Und Bender Kg | Riemenspannvorrichtung und Riementrieb mit einer solchen Riemenspannvorrichtung |
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CN112204272A (zh) * | 2018-03-27 | 2021-01-08 | 盖茨公司 | 张紧器 |
CN112888877A (zh) * | 2018-10-23 | 2021-06-01 | 盖茨公司 | 张紧器 |
CN111120598A (zh) * | 2018-11-01 | 2020-05-08 | 上海汽车集团股份有限公司 | 一种发动机及其皮带张紧器 |
Also Published As
Publication number | Publication date |
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CA2992308A1 (en) | 2017-01-19 |
JP6532592B2 (ja) | 2019-06-19 |
BR112018000790A2 (pt) | 2018-09-04 |
JP2018520323A (ja) | 2018-07-26 |
KR20180028501A (ko) | 2018-03-16 |
RU2018105104A3 (zh) | 2019-08-13 |
AU2016294331B2 (en) | 2019-03-28 |
WO2017011259A1 (en) | 2017-01-19 |
US20170016517A1 (en) | 2017-01-19 |
BR112018000790B1 (pt) | 2023-03-28 |
RU2018105104A (ru) | 2019-08-13 |
CA2992308C (en) | 2019-03-26 |
EP3322918B1 (en) | 2019-09-04 |
US9618099B2 (en) | 2017-04-11 |
CN107835907B (zh) | 2020-07-17 |
EP3322918A1 (en) | 2018-05-23 |
KR101979555B1 (ko) | 2019-05-16 |
MX2018000481A (es) | 2018-05-07 |
AU2016294331A1 (en) | 2018-02-01 |
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