CN109383481B - 在电子滑动调节的车辆制动设备中设定和/或调节制动压力的压力介质单元和帽形过滤元件 - Google Patents
在电子滑动调节的车辆制动设备中设定和/或调节制动压力的压力介质单元和帽形过滤元件 Download PDFInfo
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Abstract
本发明涉及尤其是用于在能够电子滑动调节的车辆制动设备中设定和/或调节制动压力的压力介质单元(30)以及帽形的过滤元件(36)。已知的压力介质单元配备有壳体块(12)、构造在其上并且引导压力介质的通道(18)、控制机构(14)并且配备有过滤元件(16),所述控制机构控制通道(18)的横截面,所述过滤元件配属于控制机构(14)并且被固定在通道(18)的内部。根据本发明,过滤元件被构造为帽形,并且,在其外周处具有径向突出的固定部分(50),所述固定部分具有能够弹性变形的横截面。如此构造的固定部分(50)补偿了温度更替引起的、在构件之间的伸长差,阻止了在过滤元件(50)处的间隙并且取得了特别好的过滤效果。
Description
技术领域
本发明涉及用于在能够电子滑动调节的车辆制动设备中设定和/或调节制动压力的压力介质单元,以及帽形的过滤元件。
背景技术
在下文中,能够滑动调节的车辆制动设备被理解为液压制动设备,所述液压制动设备具有防抱死保护(ABS)-、驱动防滑(ASR)-和/或行驶动力(ESP)-调节,其中,根据在配属的车轮处的、相应的滑移率来设定车轮制动器的制动压力。在此,这种压力适配能够是自动地(即,无驾驶员参与)或者在驾驶员的参与下被执行。为此所使用的压力介质单元除其他外具有壳体块,所述壳体块配备有压力发生器、存储器和控制阀,在所述壳体块处构造有多个引导压力介质的通道,以便使所阐述的部件或者用于这些部件的接收部传导压力介质地彼此连接,所述接收部被构造在壳体块处。控制阀能够电子地被操控,并且,允许符合需要地改变配属的通道的横截面以用于压力控制。为此,存在电子的控制装置,所述控制装置根据待设置的制动压力执行对控制阀的、所适配的电子操控。此外,电子的控制装置也操控马达,所述马达被紧固在壳体块处,所述马达开动压力发生器。
压力介质的、可能的污物能够在控制压力介质的部件中(尤其是就控制阀而言)导致损坏并且导致不希望的不密封性。为了避免这些缺点,从现有技术中已知,为压力介质单元配备过滤元件。
图1示出了申请人从背景技术中已知的压力介质单元10,所述压力介质单元具有壳体块12、控制阀14和过滤元件16,所述控制阀被布置在壳体块12处,所述过滤元件被布置在引导压力介质的通道18的内部中,所述通道也被构造在壳体块12处。轴向过滤器20配属于控制阀14,以便将污物从压力介质中过滤处,在这种压力介质进入控制阀14中之前。为此,示例性地将轴向过滤器20锚固在下述位置处,在所述位置处,第二通道22汇入第一通道18中。轴向过滤器20由实施为空心柱形的过滤器支架构成,所述过滤器支架具有构造在其上的、周侧的开口。这些开口由压力介质穿流并且由过滤织物覆盖,所述过滤织物具有确定的网孔大小(Maschenweite)。压力介质从第二通道22中穿过过滤织物的网孔织物流入轴向过滤器20的、空心的内部中,在其中偏转并且在经过滤的状态下穿过轴向过滤器20的、敞开的端部流出,所述端部面向控制阀14。利用其背离控制阀14的第二端部,使轴向过滤器支撑在盲孔状构造的第一通道18的底部处。
所提到的过滤器支架通常由塑料制成,并且能够被注塑成型在过滤织物处。它为本身就是柔性的过滤织物赋予了稳定性,使得轴向过滤器20在径向的预紧下能够插入到引导压力介质的第一通道18中并且能够被布置在其中。据此,在轴向过滤器20和通道18的壁之间存在力传递,通过所述力传递使轴向过滤器20在周侧密封地安置在通道18中。在所示出的情况下,轴向过滤器20在第一通道18中的、轴向的固定通过将轴向过滤器20压紧在第一通道18的底部处的止挡部上以及通过控制阀14的、随后的组装来完成,所述控制阀在组装状态下以在组装方向上伸出的阀套管贴靠在轴向过滤器20的、流出侧的第一端部处。由于在阀套管的端面与第一通道18的底部之间的距离通常略小于轴向过滤器20的长度,附加地,在被安装的状态下轴向的预紧力作用在轴向过滤器20上。
众所周知,作为温度更替的结果,不同材料的构件不同强度地伸长或者在对应的冷却时不同强度地收缩。与此对应地,在温度升高时,轴向过滤器20比周围的壳体块12或者控制阀更强烈地伸长,所述轴向过滤器基本上由塑料制成,所述壳体块和控制阀二者主要由金属制成。在温度下降时,这能够例如导致:在轴向过滤器20处出现轴向的和/或径向的间隙,或者,轴向过滤器20能够在第一通道18的内部中进行轻微的运动。在极端情况下,甚至出现了通向轴向过滤器20的液压旁路,通过所述液压旁路能够将未过滤的压力介质向前挤到控制阀14并且能够在那里造成损坏或者不密封性。
因此,从这种所阐述的技术背景出发,本发明基于这个任务:提出具有过滤元件的压力介质单元,其中,有利地,在交替的温度条件下,这种过滤单元在其密封效果方面更得到进一步发展。
发明内容
发明优点
与此相对,根据本发明的压力介质单元具有这样的优点:补偿或者阻止在过滤元件处的温度变化时所出现的径向的和/或轴向的间隙。避免了出现围绕过滤元件的液压旁路,并且,相对于潜在的、由污染引起的损坏或者不密封性来更可靠地保护控制压力介质的部件,所述部件被布置在压力介质回路中的过滤元件的下游。
根据本发明,过滤元件为此具有沿着其外周径向向外突出的并且在其横截面中能够弹性变形的固定部分。
根据本发明的固定部分构造空心体,所述空心体具有沿着过滤体的外周环绕的环状间隙。优选地,具有这种固定部分的过滤元件由金属制成一体。一方面,这减小了在过滤元件和周围的构件之间的、温度更替引起的伸长差,并且,另一方面,这简化了过滤元件的制造过程。此外,过滤元件和控制阀一起形成了预组装的组件,所述组件具有在轴向方向上紧凑的尺寸,所述组件现在能够在唯一的工作流程中被锚固在壳体块处。通过根据本发明所构造的过滤元件在很大程度上排除了过滤元件的过滤织物的、不希望的变形或者损坏,并且,因此排除了过滤元件在运行条件下的流动阻力的恶化,所述变形或者损坏在组装压力介质单元时可能出现。除其他外,在所提出的过滤元件的径向和轴向方向上的、较小的支撑力也为此做出贡献。另外,较小的支撑力伴随着低的装配力,并且,因此在将控制阀组装到壳体块处时伴随着小的、潜在的碎屑生成危险。
附图说明
本发明的实施例在附图中被示出,并且,在以下描述中被详细地阐述。
图1示出了开头已经描述的、申请人已知的背景技术,以及,
图2参照根据图1的细节X以简化的视图示出了本发明所基于的压力介质单元的纵截面。
具体实施方式
在图2中示出了压力介质单元30,所述压力介质单元由壳体块32、控制阀34和根据本发明所构造的过滤元件36构成,所述控制阀被锚固在壳体块32处。在壳体块32处构造有用于控制阀34的接收部38。在此,涉及实施为盲孔状的钻孔,所述钻孔通向壳体块32的外侧,并且,所述钻孔的底部位于壳体块32的内部。从钻孔壁到钻孔的底部的过渡被实施为直角,所述钻孔壁包围钻孔。所阐述的接收部经由通道40与引导压力介质的回路(未进一步示出)连接,所述通道在钻孔的底部处汇入。
如所提及的,在接收部38中插入控制阀34,但是在附图中仅绘制了阀壳体42,所述阀壳体决定了控制阀的外轮廓。这个阀壳体42具有空心柱形的形状,所述形状在其外直径中成直角地收缩一次。在直径减小的位置处,阀壳体42构造水平的、环绕的肩部,利用所述肩部所述控制阀34与壳体块的外侧齐平地放置。控制阀34以套管44伸入接收部38的内部中,所述套管具有较小的外直径。在这个套管44的前端部处居中地设置有开口46,穿过所述开口完成为控制阀34供应压力介质,所述前端部在接收部38的内部中。在此,开口直径由阀壳体42的、环形的前端部包围。
在控制阀34的纵向轴线的方向上,在阀壳体42的前端部和接收部38的底部之间存在轴向的间隔,所述前端部设有开口46。在由此出现的安装空间中区段式地接收过滤元件36。这个过滤元件36被构造成帽形,并且,划分成过滤拱顶48以及固定部分50,所述过滤拱顶穿过在阀壳体42中的开口46伸入控制阀34的内部中,所述固定部分在控制阀34的外部被接收在安装空间中,所述安装空间在控制阀34的前端部和接收部38的底部之间。优选地,过滤拱顶48和固定部分50形成一件式的并且由过滤织物形成的结构元件。网孔织物用作过滤织物,所述网孔织物由金属、例如由钢板制成,所述网孔织物的网孔大小能够根据在压力介质中预期的污物以及在压力介质的温度更替时允许的节流特性而应用特定地来选择。过滤元件36的过滤拱顶48和阀壳体42的开口46在其相应的尺寸上如此彼此协调,使得能够将过滤元件36不可丢地、力传递地紧固在控制阀34处,在完成这个组件在壳体块32处的、所设置的组装之前。
过滤元件36的固定部分50被构造在过滤拱顶48的、敞开的端部处,并且,从这个过滤拱顶48处朝向径向外部地突出。它被成型为环绕的空心体,在所示出的应用情况中成型为环状凸缘(Ringwulst),所述环状凸缘具有圆形的横截面。这个空心体的横截面不是封闭的,而是通过环状间隙52朝向周围环境敞开。通过这种构造,固定部分50在径向的延伸方向上和在轴向的延伸方向上都具有相对较高的形状弹性。在此,过滤元件36的固定部分50的、外部的尺寸如此适配于壳体块32的接收部38的内直径以及适配于在阀壳体42的前端部和接收部38之间的底部之间的距离,使得固定部分50在压力介质单元30的组装状态下既在径向方向上也在轴向方向上预紧地被安装。这意味着,在压力介质单元30的组装状态下,固定部分50在预紧下密封地贴靠在接收部38的钻孔壁处、接收部38的底部处和控制阀34的前端部处,并且,因此不允许围绕过滤元件36产生液压旁路,所述前端部包围阀壳体42的开口46。固定部分50的预紧能够通过其尺寸以及通过其基于材料选择的形状弹性和构造来如此确定,使得温度更替引起的、构件的伸长或者收缩不会危害固定部分50的密封效果。
就所述实施例而言,固定部分50的、圆环形的横截面能够例如通过过滤元件36的、敞开的端部的卷绕来制造。这种制造方法导致,空心体的环状间隙52直接沿着过滤拱顶48的外周被布置。环状间隙52的这种布置具有这个优点:然后,在压力介质单元30的组装状态下,它由控制阀34的前端部覆盖,所述前端部包围开口46。
当然,在不偏离本发明基于的思想的情况下,对所描述的实施例的改变或者补充是能够设想的。在这种背景下,应当指出,仅是示例性地、与液压的车辆制动设备结合地阐述了本发明,然而本发明不应当限于此。本发明也能够很容易地被应用于压力介质单元,所述压力介质单元在气动的压力回路中控制压力或者压力介质量。
Claims (7)
1.压力介质单元,用于在能够电子滑动调节的车辆制动设备中设定和/或调节制动压力,
具有壳体块(32),在所述壳体块处构造有引导压力介质的通道(40),
具有控制部件(34),所述控制部件控制在所述通道(40)中的压力介质的通过量,并且
具有过滤元件(36),所述过滤元件配属于所述控制部件(34)并且被布置在所述通道(40)中,
所述过滤元件(36)被构造为帽形并且沿着其外周具有朝向径向外部突出的固定部分(50),所述固定部分具有能够弹性变形的横截面,
其特征在于,
所述过滤元件(36)具有过滤拱顶(48),它利用所述过滤拱顶穿过开口(46)伸入到所述控制部件(34)的内部中,所述开口为所述控制部件(34)供应压力介质,
将所述过滤元件(36)力传递地保持在阀壳体(42)的开口(46)中,并且,
所述过滤元件(36)的所述固定部分(50)被布置在所述控制部件(34)的外部,并且,贴靠在所述控制部件(34)的前端部处,所述前端部包围所述开口(46)。
2.根据权利要求1所述的压力介质单元,
其特征在于,
将所述固定部分(50)构造成敞开的空心体,所述空心体具有环绕的环状间隙(52)。
3.根据权利要求2所述的压力介质单元,
其特征在于,
所述固定部分(50)具有圆形的横截面,并且,将所述环状间隙(52)布置在这个横截面的、面向所述控制部件(34)的区域处。
4.根据权利要求1所述的压力介质单元,
其特征在于,
在所述压力介质单元与所述固定部分(50)的组装状态下,所述过滤元件(36)在轴向的预紧下被布置在止挡部和所述控制部件(34)之间,在所述壳体块(32)处构造所述止挡部,将所述控制部件锚固在所述壳体块(32)处,并且,
所述固定部分(50)径向密封地贴靠在所述壳体块(32)的、引导压力介质的通道(40)的壁处。
5.帽形的过滤元件(36),其用于根据权利要求1-4中任一项所述的压力介质单元,所述过滤元件具有固定部分(50),所述固定部分沿着所述过滤元件的外周朝向径向外部突出并且具有能够弹性变形的横截面。
6.根据权利要求5所述的帽形的过滤元件(36),
其特征在于,
将所述固定部分(50)构造成敞开的空心体,所述空心体具有环绕的环状间隙(52)。
7.根据权利要求5所述的帽形的过滤元件,
其特征在于,
所述过滤元件(36)一件式地被实施并且由结构元件构成,所述结构元件由金属的过滤织物形成,
除了所述固定部分(50),所述过滤元件还具有过滤拱顶(48),所述过滤拱顶具有闭合的第一端部以及敞开的第二端部,并且
在所述过滤拱顶(48)的所述敞开的第二端部处构造所述固定部分(50)。
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