CN109715981B - 张紧器 - Google Patents

张紧器 Download PDF

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CN109715981B
CN109715981B CN201780056788.XA CN201780056788A CN109715981B CN 109715981 B CN109715981 B CN 109715981B CN 201780056788 A CN201780056788 A CN 201780056788A CN 109715981 B CN109715981 B CN 109715981B
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CN109715981A (zh
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A·马丁内兹
E·维克
V·洛伊希特
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H7/10Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1218Means 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H7/0829Means for varying tension of belts, ropes, or chains with vibration damping means
    • F16H7/0831Means for varying tension of belts, ropes, or chains with vibration damping means of the dry friction type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H7/10Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0802Actuators for final output members
    • F16H2007/0806Compression coil springs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0802Actuators for final output members
    • F16H2007/081Torsion springs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0863Finally actuated members, e.g. constructional details thereof
    • F16H2007/0865Pulleys
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0863Finally actuated members, e.g. constructional details thereof
    • F16H2007/0874Two or more finally actuated members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0889Path of movement of the finally actuated member
    • F16H2007/0893Circular path

Abstract

一种张紧器,包括:第一枢转臂,其具有与它进行轴颈连接的第一带轮;第二枢转臂,其有与它轴颈连接的第二带轮;截头锥形基部,其有基部顶点;截头锥形枢轴,其有枢轴顶点,基部顶点定向成在公共轴线上与枢轴顶点相对,第一枢转臂用于绕截头锥形枢轴进行枢转,第二枢转臂用于绕截头锥形基部进行枢转;第一衬套,该第一衬套用于阻尼第一枢转臂在截头锥形枢轴上的运动;第二衬套,该第二衬套用于阻尼第二枢转臂在截头锥形基部上的运动;以及弹簧,该弹簧在压缩时促使第一枢转臂与截头锥形枢轴接合并促使第二枢转臂与截头锥形基部接合。

Description

张紧器
技术领域
本发明涉及一种张紧器,更特别是涉及一种具有枢轴的张紧器,该枢轴有布置在共同轴线上的两个面对的截头锥形部分,第一枢转臂和第二枢轴各自与相应的面对的截头锥形部分接合。
背景技术
用于汽车等的大多数发动机包括多个皮带驱动的附件系统,这些附件系统是车辆正常操作所必需的。附件系统可以包括交流发电机、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。各附件有一个安装在轴上的带轮,用于从某种形式的皮带驱动器接收动力。在早期系统中,各附件由在附件和曲轴之间运转的单独皮带来驱动。由于皮带技术的改进,目前在大多数应用中通常使用单个蛇形皮带。在各种附件部件之间运行的单个蛇形皮带驱动该附件。发动机曲轴驱动蛇形皮带。
由于蛇形皮带的路线必须经由所有附件,因此它通常比以前更长。为了合适地操作,皮带以预定的张力来安装。在它操作时,它的长度稍微拉伸。这导致皮带张力降低,这可能导致皮带打滑。因此,皮带张紧器用于当皮带在使用过程中拉伸时保持合适的皮带张力。
当前的汽车制造商趋向于利用单个可逆的启动器发电机来代替传统的启动马达和发电机,其通过驱动皮带而与曲轴连接。在启动步骤中,启动器发电机用作马达并且驱动内燃机的曲轴;相反,当车辆运动时,启动器发电机由内燃机驱动并且产生电流,用于使电池再充电并运行辅助系统。
在使用启动器发电机的情况下,根据操作模式,皮带跨度将有不同的张力。该跨度在启动阶段较紧,其中,启动器发电机是驱动部件而内燃机是从动部件,且该跨度在正常运行阶段中变松弛,其中,内燃机是驱动的部件,启动器发电机是从动部件。
为了克服该问题,已知双向皮带张紧器或双臂皮带张紧器,即该双向皮带张紧器或双臂皮带张紧器包括两个设有带轮的臂,各壁作用在皮带的相应跨度上。两个臂能够安装在相同的枢轴点上,以便绕公共轴线枢转。臂通过弹簧而沿相互方向加载,以使得相应带轮将与带的相应跨距配合,从而保证它们的合适张力。
现有技术的代表是US2002/0039944,它公开了一种用于皮带驱动系统的改进的皮带张紧器,该皮带驱动系统有皮带张紧器、曲轴带轮、附件带轮和马达/发电机带轮。皮带驱动系统还包括动力传动皮带,该动力传动皮带绕曲轴带轮、附件带轮和马达/发电机带轮而拉动。皮带张紧器的类型包括:附接点,用于固定在相对于发动机气缸体的固定点上;第一皮带张紧器带轮;偏压部件;以及连接部分,用于通过第一皮带张紧器带轮而从偏压部件向动力传动皮带传递力。它的改进在于,皮带张紧器包括第二张紧器带轮,连接部分用于从偏压部件向第一张紧器带轮和向第二张紧器带轮传递力,从而相互不对称地偏压第一张紧器带轮和第二张紧器带轮(朝向趋向于增加动力传动带上的张力的运动)。
需要一种具有枢轴的张紧器,该枢轴有布置在共同轴线上的两个面对的截头锥形部分,第一枢转臂和第二枢转臂各自与相应的面对的截头锥形部分接合。本发明满足了这种需要。
发明内容
本发明的主要方面是提供一种具有枢轴的张紧器,该枢轴有布置在共同轴线上的两个面对的截头锥形部分,第一枢转臂和第二枢转臂各自与相应的面对的截头锥形部分接合。
通过下面对本发明的说明以及附图,将指出或清楚本发明的其它方面。
本发明包括一种张紧器,该张紧器包括:第一枢转臂,第一枢转臂有与它与它轴颈连接的第一带轮;第二枢转臂,该第二枢转臂有与它轴颈连接的第二带轮;截头锥形基部,该截头锥形基部有基部顶点;截头锥形枢轴,该截头锥形枢轴有枢轴顶点,基部顶点定向成在公共轴线上与枢轴顶点相对,第一枢转臂布置成用于绕截头锥形枢轴进行枢转,第二枢转臂布置成用于绕截头锥形基部进行枢转;第一衬套,该第一衬套用于阻尼第一枢转臂在截头锥形枢轴上的运动;第二衬套,该第二衬套用于阻尼第二枢转臂在截头锥形基部上的运动;以及弹簧,该弹簧在压缩时促使第一枢转臂与截头锥形枢轴接合和促使第二枢转臂与截头锥形基部接合。
附图说明
包含在说明书中并形成说明书一部分的附图表示了本发明的优选实施例,并与说明书一起用于解释本发明的原理。
图1是透视图。
图2是分解图。
图3是剖视图。
具体实施方式
图1是透视图。张紧器1000包括第一枢转臂100和第二枢转臂200。带轮101与枢转臂100轴颈连接。带轮201与枢转臂200轴颈连接。枢转臂100和枢转臂200独立地绕公共轴线A-A枢转。在操作中,所述枢转臂通过扭转弹簧而以类似剪刀的方式彼此相向偏压。
图2是分解图。紧固件800穿过枢轴400和基部700延伸,以便使得张紧器附接在安装表面上。衬套500布置在枢轴400和枢转臂100之间。衬套600布置在基部700和枢转臂200之间。枢转臂100和枢转臂200绕枢轴400进行枢转,该枢轴400与轴线A-A对齐。弹簧300扭转偏压枢转臂100和枢转臂200,以使得负载施加在与各带轮101和201接合的皮带(B)上。
衬套500和衬套600各自为截头锥形形状。枢轴400的截头锥形部分401与衬套500配合接合。基部700具有与衬套600配合接合的截头锥形形状。部分401表示了顶角α。基部700表示了顶角β。顶角α和顶角β可以由用户调节。根据设计要求,它们可能相等或不相等。它们通常各自在大约30度至大约120度的范围内。这些数字提供作为实例,并不限制本发明的范围。
衬套500的顶点的指向与衬套600的顶点相对。部分401的顶点402的指向与基部700的顶点702相对。这种方位将枢转臂100和枢转臂200捕获在部分401和基部700之间。
紧固件102将带轮101保持在枢转臂100上。紧固件202将带轮201保持在枢转臂200上。防尘罩103防止碎屑污染带轮轴承104。防尘罩203防止碎屑污染带轮轴承204。
图3是剖视图。枢轴400与基部700配合接合。基座顶点702的指向与枢轴顶点402相对。
枢转臂100和枢转臂200夹在枢轴截头锥形部分401和截头锥形基部700之间。扭转弹簧300在第一枢转臂和第二枢转臂上施加轴向弹簧力,从而将枢转臂100推压至枢轴部分401中,将枢转臂200推压至基部700中。
衬套500和衬套600各自作用而阻尼相应枢转臂100和200的运动。通过由弹簧300在各枢转臂上施加的轴向力而产生摩擦力。弹簧300在枢转臂100和枢转臂200之间沿轴向压缩。摩擦力是由弹簧的轴向压缩产生的弹簧力的函数。
基部700的表面701与安装表面接合,例如发动机(未示出)。紧固件800将张紧器固定在安装表面上。
在操作中,枢转臂100独立于枢转臂200而运动。在枢转臂之间的较小间隙“G”使得所述枢转臂能够独立运动。组合的部分401和基部700还可以包括枢轴,其具有在公共轴线A-A上的面对的截头锥形部分,枢转臂100、200被捕获在它们之间。部分401和基部700的面对的截头锥形状使其很容易定位从而能够在紧凑的张紧器组件中进行独立的枢转臂运动。枢轴和基座的截头锥形形状各自提供了枢转臂在操作过程中的自动对齐装置。当衬套磨损时还保持这种对齐。
一种张紧器,包括:第一枢转臂,第一枢转臂有与它进行轴颈连接的第一带轮;第二枢转臂,该第二枢转臂有与它轴颈连接的第二带轮;截头锥形基部,该截头锥形基部有基部顶点;截头锥形枢轴,该截头锥形枢轴有枢轴顶点,基部顶点的方位在公共轴线上与枢轴顶点相对,第一枢转臂布置成用于绕截头锥形枢轴进行枢转,第二枢转臂布置成用于绕截头锥形基部进行枢转;第一衬套,该第一衬套阻尼第一枢转臂在截头锥形枢轴上的运动;第二衬套,该第二衬套阻尼第二枢转臂在截头锥形基部上的运动;以及弹簧,该弹簧在压缩时促使第一枢转臂与截头锥形枢轴接合和促使第二枢转臂与截头锥形基部接合。
一种张紧器,包括:第一枢转臂,第一枢转臂有与它进行轴颈连接的第一带轮;第二枢转臂,该第二枢转臂有与它轴颈连接的第二带轮,第一枢转臂和第二枢转臂被捕获在相对的截头锥形表面之间;以及扭转弹簧,该扭转弹簧在第一枢转臂和第二个枢转臂之间压缩。
一种张紧器包括:第一枢转臂,第一枢转臂有与它进行轴颈连接的第一带轮;第二枢转臂,该第二枢转臂有与它轴颈连接的第二带轮;枢轴,该枢轴有布置在公共轴线上的两个面对的截头锥形部分,第一枢转臂和第二枢转臂各自与相应的面对的截头锥形部分接合;以及扭转弹簧,该扭转弹簧在第一枢转臂和第二枢转臂之间沿轴向压缩,扭转弹簧将第一枢转臂和第二枢转臂彼此相向推压。
尽管这里已经介绍了本发明的一种形式,但是本领域技术人员显然知道,在不脱离这里所述的本发明精神和范围的情况下可以对部件和方法的结构和关系进行变化。

Claims (5)

1.一种张紧器,包括:
第一枢转臂(100),第一枢转臂(100)有与其进行轴颈连接的第一带轮(101);
第二枢转臂(200),该第二枢转臂(200)有与其进行轴颈连接的第二带轮(201),所述第一枢转臂(100)和第二枢转臂(200)彼此独立地绕公共轴线(A-A)枢转;
截头锥形基部(700),该截头锥形基部(700)有基部顶点(702);
截头锥形枢轴(400),该截头锥形枢轴(400)有枢轴顶点(402),
所述基部顶点定位得在所述公共轴线(A-A)上与所述枢轴顶点相对,
所述第一枢转臂布置成用于绕所述截头锥形枢轴进行枢转运动,所述第二枢转臂布置成用于绕所述截头锥形基部进行枢转运动;
第一衬套(500),该第一衬套(500)用于阻尼所述第一枢转臂在所述截头锥形枢轴上的枢转运动;
第二衬套(600),该第二衬套(600)用于阻尼所述第二枢转臂在所述截头锥形基部上的枢转运动;以及
弹簧(300),该弹簧在压缩时促使所述第一枢转臂与所述截头锥形枢轴进行接合并促使所述第二枢转臂与所述截头锥形基部进行接合。
2.一种张紧器,包括:
第一枢转臂,第一枢转臂有与其进行轴颈连接的第一带轮;
第二枢转臂,该第二枢转臂有与其进行轴颈连接的第二带轮,
所述第一枢转臂和第二枢转臂被捕获在相对的截头锥形表面之间;以及
扭转弹簧,该扭转弹簧在所述第一枢转臂和第二枢转臂之间压缩。
3.一种张紧器,包括:
第一枢转臂,第一枢转臂有与其进行轴颈连接的第一带轮;
第二枢转臂,该第二枢转臂有与其进行轴颈连接的第二带轮,所述第一枢转臂(100)和第二枢转臂(200)彼此独立地绕公共轴线(A-A)枢转;
枢轴,该枢轴有布置在所述公共轴线上的两个面对的截头锥形部分,所述第一枢转臂和第二枢转臂各自与相应的面对的截头锥形部分接合;以及
扭转弹簧,该扭转弹簧在所述第一枢转臂和第二枢转臂之间沿轴向压缩,所述扭转弹簧将所述第一枢转臂和第二枢转臂彼此相向推压。
4.根据权利要求3所述的张紧器,还包括:在所述第一枢转臂和所述面对的截头锥形部分中的一个之间的摩擦衬套。
5.根据权利要求4所述的张紧器,还包括:在所述第二枢转臂和所述面对的截头锥形部分中的另一个之间的摩擦衬套。
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