CN210859008U - 用于燃料高压泵的泵挺杆 - Google Patents

用于燃料高压泵的泵挺杆 Download PDF

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CN210859008U
CN210859008U CN201920250750.2U CN201920250750U CN210859008U CN 210859008 U CN210859008 U CN 210859008U CN 201920250750 U CN201920250750 U CN 201920250750U CN 210859008 U CN210859008 U CN 210859008U
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pump tappet
pump
housing
tappet
casing
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马可·容克尔
诺伯特·盖耶
理查德·拜尔
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Schaeffler Holding China Co Ltd
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Schaeffler Technologies AG and Co KG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details or component parts
    • F04B1/0426Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102Mechanical drive, e.g. tappets or cams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

本实用新型涉及一种用于燃料高压泵的泵挺杆,所述泵挺杆包括空心柱体形的壳体(2),所述壳体的驱动侧(3)具有滚子(4)以用于周期性的行程发生器的逆向运行,并且所述壳体的从动侧(5)具有底部(6)以用于在所述壳体的外侧(7)上接触随动环节,其中,所述滚子(4)被安置在销栓(8)上,所述销栓插塞到从所述壳体(2)的外周侧(9)缩进的扁平部(10)中。所述泵挺杆(1)具有长套筒状的几何形状,其中,所述泵挺杆的从动侧的端面(11)由一件式地接合的形成所述底部(6)的底部封闭。

Description

用于燃料高压泵的泵挺杆
技术领域
本实用新型涉及一种泵挺杆,尤其是用于燃料高压泵的泵挺杆,其由空心柱体形的壳体构成,壳体的驱动侧具有滚子以用于周期性的行程发生器的逆向运行,并且其从动侧具有底部以用于在其外侧接触随动环节,其中,滚子被安置在销栓上,销栓被插塞到从壳体的外周侧缩进的扁平部中。
背景技术
EP 2 406 494 B1公开了一种泵挺杆,其具有单独的放入板作为用于被构造为泵活塞的随动环节的接触配合件。在此,板被扣合在泵挺杆的壳体上的在内壁的突出部的后面,并且在运行时被支撑在缩进的扁平部的下侧上。该板相对于壳体能略微运动,这可能会导致噪音排放和磨损。还可以看出,泵挺杆在其高度-直径比例方面具有近似方形的设计方案。
这种泵挺杆的结构高度由其与例如是在凸轮轴的末端端面上的行程发生器的凸轮止推部和泵传动装置中的泵活塞端面的接触点的位置来确定。如果在此动用迄今为止惯用的凸轮轴驱动装置,则仅需要结构相对短的泵挺杆。经由在此加厚的桥接件来截获提升的泵力。然而,为了截获更高的力而越来越厚的桥接件由于可制造性和可装配性产生了明显的限制。
上述接触点的相当窄的间距在内燃机上的泵凸轮或泵偏心轮的其他布置方案中被增大。在此,也越来越多地被设立到曲轴侧或平衡轴侧的行程发生器上。
实用新型内容
因此,本实用新型的任务是创建一种结构轻便且硬的泵挺杆,其适宜于更高的安装长度。
根据本实用新型,该任务通过如下方式来解决,即,泵挺杆具有长套筒状的几何形状,其中,泵挺杆的从动侧的端面由一件式地接合的形成底部封闭。
因此,该泵挺杆不存在上述缺点。设有一件式地接合的底部的泵挺杆最终被倒置装配,并且要么经深拉地存在要么经挤压地存在。必要时,底部的用于接触泵活塞的外侧也可以设有涂覆的硬质涂层 (PVD,CVD)。相对于壳体更厚的底部可以要么以板坯(深拉)提供,要么它在挤压中被一起产生。必要时,壳体的与底部邻接的初始的壁区域也可以比朝驱动侧的端面的方向的其余的壁区域“更厚”地存在。
由于底部接合是一体式的,使得不再面临上述的噪音形成(发出嘎嘎响声)的问题,并且取消了附加的拼接花费。
根据本实用新型的特别优选的变型方案,泵挺杆比其外直径至少高了1.5倍。在此,1.8至2.0或更高的比例也是能良好地设想且设置的。
在底部中的至少一个贯通开口,例如钻孔,防止了油或燃料被在内壁处积聚在壳体中或在运行时发生“鼓起(aufpumpen)”。
所提出的泵挺杆也可用于气门或压缩机传动装置中。它的滚子要么经由滑动轴承装置要么经由滚针轴承装置在销栓上延伸。
附图说明
·图1示出穿过横向通过泵挺杆的销栓轴向线的泵挺杆的壳体的纵剖面;
·图2示出相对于图1转动了90°的纵剖面;
·图3示出具有滚子的泵挺杆的俯视图;并且
·图4示出具有防扭转部的泵挺杆的仰视图。
附图标记列表
1) 泵挺杆
2) 壳体
3) 驱动侧
4) 滚子
5) 从动侧
6) 底部
7) 外侧
8) 销栓
9) 外周侧
10) 扁平部
11) 从动侧的端面
12) 贯通开口
13) 内侧
14) 外端面
15) 驱动侧的端面
16) 窗口
17) 销钉
18) 孔眼
19) 内侧
具体实施方式
由附图得知了用于燃料高压泵的泵挺杆1。泵挺杆1具有由板材制成的经长向拉伸的、空心柱体形的壳体2。在其驱动侧3中延伸有用于凸轮逆向运行的滚子4。滚子4被安置在销栓8上,销栓被插塞到扁平部10的孔眼18中,并且子段式地探伸超过壳体2的驱动侧的端面 15。在此,扁平部10从壳体2的驱动侧的端面15出发。如图2、3所示,扁平部相对于壳体2的外周侧9缩进。滚子4以其外端面14侧向地在扁平部10的内侧13上引导。
如图1、2所公开地,壳体2在其从动侧的端面11上,进而在其从动侧5,具有一件式地接合的底部6,该底部的外侧7用于与泵活塞或其他的随动环节贴靠。底部6的内侧19从其平坦的中心朝内侧13 的方向略微屋顶状地下降。底部6的壁厚SB在此通常大于壳体2的壁厚DG
最后还从图4得知,底部6具有四个均匀分布的用介质穿过(空气,油,燃料)的贯通开口12,并且在壳体2中紧固有销钉17作为防扭转部。

Claims (6)

1.泵挺杆(1),其用于燃料高压泵,所述泵挺杆包括空心柱体形的壳体(2),所述壳体的驱动侧(3)具有滚子(4)以用于周期性的行程发生器的逆向运行,并且所述壳体的从动侧(5)具有底部(6)以用于在所述壳体的外侧(7)上接触随动环节,其中,所述滚子(4)被安置在销栓(8)上,所述销栓插塞到从所述壳体(2)的外周侧(9)缩进的扁平部(10)中,
其特征在于,所述泵挺杆(1)具有长套筒状的几何形状,其中,所述泵挺杆的从动侧的端面(11)由一件式地接合的形成所述底部(6)封闭。
2.根据权利要求1所述的泵挺杆,其特征在于,所述泵挺杆(1)的长度使得对于所述泵挺杆的高度(H)与外周侧(9)上的泵挺杆的引导直径(DF)的比例是:H/DF≥1.5。
3.根据权利要求1所述的泵挺杆,其特征在于,所述底部(6)的壁厚(SB)大于所述壳体(2)的壁厚(DG)。
4.根据权利要求1所述的泵挺杆,其特征在于,所述壳体(2)要么由经深拉的钢板材制成,要么以挤压技术来制成。
5.根据权利要求1所述的泵挺杆,其特征在于,所述底部(6)具有至少一个贯通开口(12)。
6.根据权利要求1所述的泵挺杆,其特征在于,所述滚子(4)以其外端面(14)止推在所述扁平部(10)的内侧(13)上。
CN201920250750.2U 2018-10-04 2019-02-27 用于燃料高压泵的泵挺杆 Active CN210859008U (zh)

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DE202018004604.3 2018-10-04
DE202018004604.3U DE202018004604U1 (de) 2018-10-04 2018-10-04 Pumpenstößel für eine Kraftstoffhochdruckpumpe

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Patentee before: SCHAEFFLER TECHNOLOGIES AG & CO.KG

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