CN100587285C - 转矩受限式分离器 - Google Patents
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Abstract
本发明提供了一种分离器组件,其允许在机动车辆发动机中交流发电机由蛇形带以可转动的方式驱动,并且允许该带的速度相对于所述交流发电机振荡。一个毂由来自交流发电机的驱动轴稳固地承载并随其一起转动。一个带轮通过球轴承组件支撑在所述毂上。一个裸露的螺旋状离合器弹簧以可工作的方式联接在所述毂与带轮之间,用于在利用蛇形带使带轮相对于毂加速的过程中将来自带轮的旋转运动传递至毂,以及用于在带轮相对于毂减速的过程中允许毂超过带轮的速度运行。优选为弹簧或套筒的转矩限制器围在扭簧的周围,限制所述扭簧向外扩张,并且将所述扭簧与超过预定极限的转矩隔离开。
Description
技术领域
本发明涉及一种用于在机动车辆发动机中驱动带传动附件的带驱动组件,更具体而言,涉及一种分离机构,该分离机构用于容许带传动附件短暂地以不同于循环驱动组件的速度运行,并将扭簧从过量转矩隔离开。
背景技术
机动车辆发动机使用循环蛇形带将发动机的一部分输出传递给多个带传动附件。通常,每个部件包括输入驱动轴以及与该驱动轴的远端联接的、用于与带传动接合的带轮。这种带传动附件的一个示例是交流发电机。
分离器以可操作方式联接于带轮和交流发电机之间,以容许交流发电机驱动轴“过速运行”或以比带轮更快的速度转动,并容许带轮的速度因发动机速度的振荡而相对交流发电机驱动轴振荡。在2000年7月4日授予Mevissen等人的美国专利6,083,130、1992年8月18日授予Bytzek等人的美国专利5,139,463以及国际专利申请WO 2004/011818中公开了分离器的示例。
在PCT申请WO 2004/011818中,分离器减少循环驱动***中的转矩波动。然而,在发动机具有强起动方式(aggressive start profile)的某些应用中或在大开油门(wide open throttle shift)期间快速加速的情况下,所传递的转矩会使扭簧受力过度,从而缩短分离器的使用寿命。
发明内容
通过提供一种防止高于预定转矩值的转矩使扭簧受力过度的分离器可以克服现有技术中的缺点。
根据本发明的一个方面,提供一种用于在轴和驱动带之间传递转矩的分离器组件。所述分离器组件包括设置为固定至所述轴上的毂。一支架以可转动的方式安装在所述毂上。一扭簧在毂和支架之间延伸,以在所述毂和所述支架之间传递转矩。一带轮以可转动的方式联接至所述毂。所述带轮具有在其内部形成的内表面。一离合器弹簧固定至所述支架并具有与所述带轮的所述内表面摩擦接合的多个螺旋簧圈(helical coils),以选择性地联接所述毂和带轮。所述扭簧与所述离合器弹簧同轴安装并且绕向相反,从而使得在所述带轮相对于所述毂加速的过程中所述离合器弹簧扩张而与所述内表面紧紧接合,而在所述带轮相对于所述毂减速的过程中撤除所述离合器弹簧与所述内表面的紧紧接合;同时使得所述扭簧能够吸收较小的转矩波动,而不使带轮从毂上分离。一套筒形式的转矩限制器装配在所述扭簧的周围并且其尺寸设置为限制所述扭簧的扩张,使得在预定转矩时或超过预定转矩时所述扭簧能够完全联接毂与带轮。
根据本发明的另一方面,所述转矩限制器是金属丝线圈的形式,其装配在所述扭簧的周围并且其尺寸设置为限制所述扭簧的扩张,从而使得在预定转矩时或超过预定转矩时所述扭簧能够完全联接所述毂与带轮。
附图说明
通过参考以下详细说明并结合附图,将容易意识到本发明的优点,并更好地理解本发明的优点。
图1是带有根据本发明一个方面的分离器组件的机动车辆发动机的正视图;
图2是分离器组件的局部放大剖视图;
图3是图2中分离器组件中的离合器弹簧的立体分解图;
图4是与图2中的分离器组件的转矩限制器和扭簧相关的离合器弹簧与支架组件的分解立体图;
图5是图2中分离器组件的离合器弹簧的立体图;
图6是图2中分离器组件的支架的立体图;
图7是图2中的离合器弹簧与支架组件的立体图;
图8是图2中分离器组件的转矩限制器的第二实施方式的立体图;
图9a是图2中分离器组件的转矩限制器的第三实施方式的立体图;
图9b是图2中分离器组件的转矩限制器的替代第三实施方式的立体图;
图10是本发明的分离器组件的第四实施方式的分离器组件的分解立体图;
图11是与图10中的分离器组件的转矩限制器与扭簧相关的离合器弹簧与支架组件的分解立体图;
图12是图10中分离器组件的离合器弹簧的立体图;
图13是图10中分离器组件的支架的立体图;以及
图14是图10中离合器弹簧与支架组件的立体图。
具体实施方式
用于机动车辆的发动机在图1中总体上用标号10标出。如本领域普通技术人员所公知的,发动机10包括驱动循环蛇形带14的曲轴12。发动机10还包括由带14驱动的带传动附件16。如下文所更详细描述的,分离器组件20以可操作方式装配在带14与带传动附件16之间,用于在带14相对于带传动附件16减速时自动地使带传动附件16从带14分离,以及容许带14的速度相对于带传动附件16振荡。此外,对分离器组件的结构和功能的详细描述可参见2000年7月4日授予申请人的美国专利6,083,130以及PCT申请WO 2004/011818,在此以引用方式将二者的内容纳入本申请中。
参照图2和3,分离器组件20大致包括毂22、带轮50、离合器组件70、扭簧90以及转矩限制器110。在第一实施方式中,转矩限制器110优选为套筒。
毂22具有大致为圆柱形的本体28以及位于其一端处的凸缘26,该本体28具有轴向延伸的孔24。凸缘26在其内面上具有大致为螺旋状的第一狭槽46。由于该狭槽46为螺旋状,所以狭槽46会具有台阶。孔24设置为用于将毂22稳固地固定到从带传动附件16伸出的驱动轴。
带轮50以可转动的方式轴颈支撑于毂22上。当衬套轴颈(bushingjournal)102将带轮50安装在凸缘26的圆周面上时,球轴承组件57在远端处联接于带轮50与毂22之间。球轴承57常规地包括内座圈、外座圈以及滚动地接合在二者之间的多个滚珠。带轮50通常包括在外周上形成的多个V形槽68,用于接合并引导带14。如本领域中所公知的,也可使用其它带或链轮廓以用于其它传动结构。
单向离合器组件70以可操作方式联接于毂22以及带轮50之间。离合器组件70包括离合器弹簧71与支架75。离合器弹簧71包括多个螺旋簧圈72。优选地,离合器弹簧71由无涂层的弹簧钢材料形成,并具有非圆形的横截面,以改善摩擦接触。更优选地,离合器弹簧71的横截面为矩形或方形。离合器弹簧71被压配合至与带轮50的内表面56摩擦接合。优选地,可以施用与球轴承组件57中所使用的油脂相似或相适应的润滑剂,以使离合器弹簧71与带轮50的内表面56之间的磨损最小化。
支架75以可转动的方式安装在毂22上。支架75大致为环形,并且具有内面78、孔80以及外圆周表面82。在内面78上形成狭槽84,并且狭槽84设置为适于保持离合器弹簧71的端部。大致为螺旋状的第二狭槽86也形成在内表面78上并且位于狭槽84内侧,从而限定第二定位表面88以及台阶。
环状止推垫圈39抵靠支架75的端部设置,并抵靠轴承组件57的内轴承座圈。止推垫圈39的外周为圆形,该外周带有台阶41以与突起互补地配合。止推垫圈39具有一个或多个径向或周向的锯齿部43,以接合毂22并将止推垫圈39机械地锁合至毂22,从而防止二者之间发生相对运动。
螺旋状扭簧90在毂22与支架75之间受到轴向压缩。扭簧90与离合器弹簧71同轴并且通常绕向相反。在某些应用中,扭簧90与离合器弹簧71的绕向可相同,以产生所需的分离作用。扭簧90的一端保持在毂22的第一狭槽46中,另一端保持在支架75的狭槽86中。由扭簧90的压缩导致的轴向力使支架75保持与止推垫圈39抵靠接合。
通常,毂22的轴具有直径减小的区域23,以在扭簧90与毂22的轴28之间提供空隙,从而防止在轴28与扭簧90之间的界面处发生不受控制的接触与摩擦磨损。因此,扭簧90容许支架75与毂22之间的相对运动,以适应因发动机运转速度振荡所引起的带轮50速度的微小变化。这种振荡不足以触发离合器组件70。
转矩限制器110以围绕形式围在扭簧90周围。优选地,该转矩限制器110具有缺口或开口112以及周向延伸的台肩114。台肩114设置为使转矩限制器110与安装在毂22的凸缘26上的衬套102互补地配合。在第一优选实施方式中,转矩限制器110由带有或不带有诸如玻璃纤维等增强材料的有机树脂材料制成,优选由NylonTM材料制成。转矩限制器110的厚度选择为占据扭簧90、离合器弹簧71以及带轮50的内直径之间的游隙。当转矩增加时,扭簧90向外扩张,直至受到抵靠离合器弹簧71的转矩限制器110与孔56的内直径的物理限制。当扭簧90、转矩限制器110、离合器弹簧71以及带轮50的内孔56之间的径向间隙被消除时,阻止弹簧90进一步扩张,从而锁定分离器10,使毂22与带轮50联接。也就是说,转矩限制器110限制扭簧90向外扩张的量,从而防止扭簧90过载。可对扭簧90的径向扩张量进行计算,并且将转矩限制器110设计为保证通过扭簧90传递的转矩保持在预定转矩值以下。
套筒的第二实施方式示于图8中。转矩限制器110′为闭合金属环。该金属环仅仅会做相对小的扩张,从而直接限制扭簧90的向外扩张。
套筒的第三实施方式示于图9a中。转矩限制器110″具有多个轴向的长形开口116,所述长形开口116绕着转矩限制器110″在圆周方向上间隔开。开口116使得油脂润滑剂能够向外到达离合器弹簧71。
套筒的替代第三实施方式示于图9b中。转矩限制器110*具有一系列在圆周方向上间隔开的开口116*和117。优选地,开口116*为长形,开口117为圆形,并且二者以规则方式间隔开,类似于高尔夫球上的凹窝。另外,转矩限制器110*具有一体地延伸的径向凸缘119,该凸缘119用作止推轴承。
盖100联接至带轮50的端部,用于防止污染物进入分离器组件20并且用于将润滑剂保持在分离器组件20内。
运行时,发动机10起动,带轮50在发动机10驱动的带14的驱动下在驱动方向上加速并转动。带轮50相对于毂22在驱动方向上的加速和转动在带轮50的内表面56与离合器弹簧71的优选所有簧圈72之间产生摩擦。可以理解的是,即使在开始时该离合器弹簧71的至少一个簧圈72与带轮50的内表面56摩擦接合的情况下,离合器弹簧71也起作用。离合器弹簧71螺旋状盘绕,从而带轮50的内表面56与至少一个簧圈72之间的摩擦会引起离合器弹簧71径向向外扩张并紧紧接合带轮50的内表面56。带轮50相对于毂22在驱动方向上的继续转动会使得簧圈72向外施加的、作用于内表面56上的径向力大致指数地增长,直至离合器弹簧71的所有簧圈72都与带轮50制动接合。当离合器弹簧71与内表面56完全接合时,带轮50的转动被完全导向带传动附件16的驱动轴15的转动。另外,离心力有助于将离合器弹簧71保持为与带轮50的内表面56制动接合。
支架75在驱动方向上的转动通过扭簧90传递给毂22,从而支架75、止推垫圈39、毂22以及带传动附件16的驱动轴15同带轮50一起转动。另外,扭簧90弹性地容许支架75与毂22之间的相对运动,以适应由于发动机10运行速度的振荡而发生的带轮50的相应速度振荡。
当带轮50减速时,由与正在转动的驱动轴15以及带传动附件16内的转动质量相关的惯性所驱动的毂22将开始“过速”或者继续在驱动方向上以高于带轮50速度的速度转动。更具体而言,毂22的比带轮50更高的转速使得离合器弹簧71相对于带轮50的内表面56径向收缩。离合器弹簧71与带轮50之间的制动接合解除,从而允许毂22与带传动附件16的驱动轴15相对于带轮50过速运行。当带轮50相对于离合器组件70与毂22减速时,簧圈72可与内表面56保持摩擦接合。随着带轮50加速超过毂22的速度,离合器弹簧71的簧圈72开始以制动的方式重新接合内表面56。
在诸如快速的发动机起动方式和/或在大开油门期间快速加速的高负载情况下,由于毂22与带轮50之间的相对转动,所以扭簧90的簧圈会受到迫压而向外扩张。扭簧90扩张,从而与转矩限制器110摩擦接合,转矩限制器110再接合离合器弹簧71。通过选择转矩限制器110的厚度而将完全摩擦接合选择为发生在预定转矩值下。一旦完全接合,毂22锁定带轮50,并且高于预定转矩值的转矩将直接在二者之间传递。因此,较高的转矩不会使扭簧90受力过度,从而最终提高分离器组件10的寿命。
参照图10到14,示出了转矩限制器110的第四实施方式。与图2和3的实施方式相同的元件保留相同的参考标号。
在该实施方式中,转矩限制器110″′采取金属丝卷簧的形式。该转矩限制器110″′绕扭簧90定位。优选地,与具有方形或矩形横截面的扭簧90相比,转矩限制器110″′由小规格的金属丝制成。转矩限制器110″′的规格和尺寸选择为基本上消除在扭簧90、离合器弹簧71与带轮50的内表面56之间原本会存在的任何游隙,同时仍然允许扭簧90与离合器弹簧71之间作相对运动。此外,转矩限制器110″′的簧圈允许油脂或任何其它润滑剂向外到达离合器弹簧71。
目前优选的是,转矩限制器110″′的簧圈以与离合器弹簧71的簧圈相同的方向缠绕,但这对于分离器20正确运行并不是必须的。
当传至带轮50的转矩增加时,扭簧90向外扩张,直至受到转矩限制器110″′的物理限制。当扭簧90、转矩限制器110″′、离合器弹簧71以及带轮50的内表面56之间的径向间隙消除时,弹簧90的进一步扩张受到阻碍,从而锁定分离器20,使毂22与带轮50联接。也就是说,转矩限制器110″′限制扭簧90向外扩张的量,从而防止扭簧90过载。
可预先确定扭簧90的径向扩张量,并且转矩限制器110″′能够设计为保证通过扭簧90传递的转矩保持在预先选择的转矩值以下。
参照图12至14,示出了离合器组件70的第二种变型。所述离合器组件70包括离合器弹簧71′与支架75′,所述离合器弹簧71′包括螺旋状簧圈。优选地,离合器弹簧71′由无涂层的弹簧钢材料形成,并且形成螺旋状绕圈72的材料具有非圆形的横截面,以改善摩擦接触。更优选地,螺旋状绕圈材料的横截面为矩形或方形。离合器弹簧71′被压配合至与带轮50的内表面56摩擦接合。优选地,可以施用与球轴承组件57中所使用的油脂相似或相适应的润滑剂,以使离合器弹簧71′与带轮50的内表面56之间的磨损最小化。
支架75′以可转动的方式安装在毂22上,并且支架75′通常为环形,并且具有内面78、孔80以及外圆周表面82。狭槽84′形成在内面78上,并设置为保持离合器弹簧71′的端部。大致为螺旋状的第二狭槽86也形成在内表面78上并且位于狭槽84内侧,从而限定第二定位表面88以及台阶。
在这个变型中,离合器弹簧71′在73与77处弯曲。狭槽84′互补地设置为接收离合器弹簧71′的端部,并与弯曲部73和77摩擦接合。
支架75′的孔80具有键槽81及一系列轴向延伸的凹窝。
图10到14中所示出分离器的工作方式与参考图1到9中的分离器所描述的工作方式相同。
在诸如快速的发动机起动方式和/或大开油门期间快速加速的高负载情况下,由于毂22与带轮50之间的相对转动,所以扭簧90的簧圈会受到迫压而向外扩张。扭簧90将扩张,引起转矩限制器110″′扩张,然后转矩限制器110″′与离合器弹簧71摩擦接触。通过选择转矩限制器110″′的绕圈的厚度将完全摩擦接合选择为发生在预定转矩值下。
优选地,离合器20还包括适配器104,该适配器104压配合至轴承57的内座圈内,允许离合器20适应于具有各种尺寸驱动轴的带传动附件,并且/或者允许将离合器20定位在从动轴上,以保证槽66与蛇形带正确对准。然而,适配器104并不是必须的,如果驱动轴的直径能正确接合轴承57的内座圈表面并且/或者如果槽66会与蛇形带正确地对准,则分离器20能够直接安装在带传动附件的驱动轴上。
已经以示例方式对本发明进行了描述,但可以理解的是,所使用的术语是说明性质的,而不是限制性的。根据以上教导,本发明可能有许多改型和变型。因此,需要理解的是,本发明可以在所附权利要求书的范围内以不同于具体说明的方式实施。
Claims (19)
1.一种用于在轴和驱动带之间传递转矩的分离器组件,所述分离器组件包括:
毂,其设置为固定地装配至所述轴上;
支架,其以可转动的方式安装在所述毂上;
扭簧,其在毂端部和支架端部之间延伸,用于在所述毂和所述支架之间弹性地传递转矩;
带轮,其以可转动的方式联接至所述毂,所述带轮具有设置成与所述驱动带摩擦接合的外周,所述带轮具有形成在其内部的内表面;
离合器弹簧,其固定至所述支架并具有与所述带轮的所述内表面摩擦接合的多个螺旋簧圈,以选择性地联接所述毂和带轮,所述扭簧与所述离合器弹簧绕向相反,从而使得在所述带轮相对于所述毂加速的过程中所述离合器弹簧能够扩张而与所述内表面紧密接合,而在所述带轮相对于所述毂减速的过程中撤除所述离合器弹簧与所述内表面的紧密接合;以及
转矩限制器,其围在所述扭簧的周围并且其尺寸设置为在预定转矩时限制所述扭簧向外扩张,其中所述转矩限制器的厚度选择为占据所述扭簧、离合器弹簧以及带轮的内表面之间的游隙,当转矩增加时,所述扭簧向外扩张,直至受到抵靠所述离合器弹簧的转矩限制器与所述内表面的物理限制,当所述扭簧、转矩限制器、离合器弹簧以及带轮的内表面之间的径向间隙被消除时,阻止所述扭簧进一步扩张,从而锁定所述分离器组件,使所述毂与带轮联接。
2.根据权利要求1所述的分离器组件,其中所述转矩限制器的厚度选择为提供所述预定转矩。
3.根据权利要求2所述的分离器组件,其中所述转矩限制器为套筒。
4.根据权利要求3所述的分离器组件,其中所述套筒设有缺口。
5.根据权利要求4所述的分离器组件,其中所述套筒为有机树脂材料。
6.根据权利要求5所述的分离器组件,其中所述套筒为增强有机树脂材料。
7.根据权利要求4所述的分离器组件,其中所述套筒为NylonTM材料。
8.根据权利要求3所述的分离器组件,其中所述套筒具有使得润滑剂能够从中通过的一系列开口。
9.根据权利要求3所述的分离器组件,其中所述套筒为连续的。
10.根据权利要求9所述的分离器组件,其中所述套筒是金属的。
11.根据权利要求1所述的分离器组件,其中所述转矩限制器是金属丝线圈。
12.根据权利要求11所述的分离器组件,其中所述转矩限制器的厚度选择为提供所述预定转矩。
13.根据权利要求12所述的分离器组件,其中所述金属丝线圈具有正方形横截面的绕圈。
14.根据权利要求12所述的分离器组件,其中所述金属丝线圈具有矩形横截面的绕圈。
15.根据权利要求12所述的分离器组件,其中所述转矩限制器与所述离合器弹簧绕向相同。
16.根据权利要求12所述的分离器组件,其中润滑剂通过所述金属丝线圈以润滑所述离合器弹簧和/或所述扭簧。
17.根据权利要求12所述的分离器组件,其中所述带轮借助于滚动轴承以可转动的方式联接至所述毂。
18.根据权利要求17所述的分离器组件,其中所述滚动轴承压配合至所述带轮中。
19.根据权利要求17所述的分离器组件,还包括适配器,所述适配器适于接合所述滚动轴承的内座圈表面以及所述分离器组件拟安装于其上的带传动附件的外表面。
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- 2006-02-03 CN CN200680003584A patent/CN100587285C/zh active Active
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- 2006-02-03 PL PL06705094T patent/PL1844245T3/pl unknown
- 2006-02-03 EP EP06705094.8A patent/EP1844245B1/en active Active
- 2006-02-03 KR KR1020077017846A patent/KR101266602B1/ko active IP Right Grant
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Also Published As
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US7766774B2 (en) | 2010-08-03 |
CA2596734A1 (en) | 2006-08-10 |
EP1844245A4 (en) | 2011-01-26 |
WO2006081657A1 (en) | 2006-08-10 |
KR20070099011A (ko) | 2007-10-08 |
EP1844245A1 (en) | 2007-10-17 |
CN101111692A (zh) | 2008-01-23 |
KR101266602B1 (ko) | 2013-05-22 |
BRPI0606764A2 (pt) | 2010-02-09 |
US20110162938A1 (en) | 2011-07-07 |
US7975821B2 (en) | 2011-07-12 |
PL1844245T3 (pl) | 2013-09-30 |
BRPI0606764B1 (pt) | 2018-10-30 |
CA2596734C (en) | 2013-12-03 |
US20100252387A1 (en) | 2010-10-07 |
JP2008528906A (ja) | 2008-07-31 |
JP5057997B2 (ja) | 2012-10-24 |
US20080194339A1 (en) | 2008-08-14 |
US8132657B2 (en) | 2012-03-13 |
EP1844245B1 (en) | 2013-04-24 |
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