CN110998090B - 用于泵、尤其燃料高压泵的凸轮轴和具有凸轮轴的泵 - Google Patents

用于泵、尤其燃料高压泵的凸轮轴和具有凸轮轴的泵 Download PDF

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CN110998090B
CN110998090B CN201880054473.6A CN201880054473A CN110998090B CN 110998090 B CN110998090 B CN 110998090B CN 201880054473 A CN201880054473 A CN 201880054473A CN 110998090 B CN110998090 B CN 110998090B
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camshaft
longitudinal axis
pump
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cams
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M·伊姆霍夫
R·迈尔
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • F04B1/0536—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders with two or more serially arranged radial piston-cylinder units
    • F04B1/0538—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders with two or more serially arranged radial piston-cylinder units located side-by-side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps 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
    • F02M59/10—Pumps 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
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
    • 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
    • F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
    • F16H53/025—Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/02—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps 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
    • F02M59/04—Pumps 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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps 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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0413—Cams
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/18—Camshafts
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

本发明提出一种尤其用于泵的凸轮轴。该凸轮轴具有至少两个沿所述凸轮轴的纵轴线方向彼此相继布置的凸轮，所述凸轮的凸轮凸起绕着凸轮轴的纵轴线相对彼此错开地布置，其中，在两个相邻的凸轮之间设置有中间区域，并且凸轮轴具有至少一个沿凸轮轴的纵轴线的方向布置在凸轮旁的轴承区域。所述中间区域在包含凸轮轴的纵轴线(25)的轴向纵截面中与凸轮轴的纵轴线隔开径向距离地延伸，所述径向距离从邻接的、在对应的轴向纵截面中具有较小的凸轮凸起的凸轮出发朝向邻接的、在对应的轴向纵截面中具有较大的凸轮凸起的凸轮增大。

Description

用于泵、尤其燃料高压泵的凸轮轴和具有凸轮轴的泵
技术领域
本发明从一种用于泵、尤其燃料高压泵的凸轮轴出发并且从一种具有凸轮轴的泵出发。
背景技术
由DE 10 2009 002 014 Al已知这样的凸轮轴和这样的呈燃料高压泵形式的泵。该泵具有两个泵元件和一个凸轮轴，所述泵元件分别具有一个泵活塞，通过所述凸轮轴，泵活塞分别通过一个滚子挺杆以升降运动的方式被驱动。凸轮轴具有两个沿其纵轴线的方向彼此相继布置的凸轮，所述凸轮的凸轮凸起绕着凸轮轴的纵轴线相对彼此错开地布置。凸轮例如可以是180°双凸轮，并且其凸轮凸起绕着凸轮轴的纵轴线相对彼此错开或扭转90°地布置。除凸轮外，凸轮轴具有至少一个轴承区域，凸轮轴通过该轴承区域例如绕着该凸轮轴的纵轴线可旋转地支承在泵的壳体中。凸轮沿凸轮轴的纵轴线方向的间距是需要的，以便能够彼此相继地放置两个泵元件。由此，在两个凸轮之间存在中间区域，该中间区域在已知的凸轮轴中通过外圆车削制造出与轴承区域的直径大致相等的直径。在泵运行期间，由于驱动泵活塞而出现凸轮轴的凸轮的负载，该负载导致凸轮轴的中间区域的弯曲负载。由于凸轮轴的中间区域的弯曲，凸轮相对于泵活塞的取向通过该凸轮倾斜的方式也改变。由此，在驱动泵活塞时出现大的负载，例如滚子挺杆和凸轮之间的倾斜位态，这能够导致凸轮以及滚子挺杆和滚子的增加的磨损。此外，由于凸轮轴的中间区域的弯曲，所述至少一个轴承区域也倾斜，由此在凸轮轴的轴承区域的棱边上产生高负载、尤其是单侧负载。
发明内容
与此相对地，本发明提出一种凸轮轴，尤其用于泵，所述凸轮轴具有至少两个沿所述凸轮轴的纵轴线的方向彼此相继布置的凸轮，所述凸轮的凸轮凸起绕着所述凸轮轴的纵轴线相对彼此错开地布置，其中，在两个相邻的凸轮之间设置有中间区域，并且所述凸轮轴具有至少一个沿所述凸轮轴的纵轴线的方向布置在所述凸轮旁的轴承区域，其中，所述中间区域在包含所述凸轮轴的纵轴线的轴向纵截面中与所述凸轮轴的纵轴线隔开径向距离地延伸，所述径向距离从邻接的、在对应的轴向纵截面中具有较小的凸轮凸起的凸轮出发朝向邻接的、在对应的轴向纵截面中具有较大的凸轮凸起的凸轮增大。
根据本发明的凸轮轴具有以下优点：能够将凸轮轴在中间区域中的弯曲保持得小，使得凸轮和至少一个轴承区域在凸轮轴在运行期间受负载的情况下不倾斜或仅轻微地倾斜并且在很大程度上保持其定向并且由此能够将凸轮以及滚子挺杆和滚子的磨损保持得小。
在下面给出根据本发明的凸轮轴的有利构型和扩展方案。
根据一个扩展方案，所述中间区域在包含所述凸轮轴的纵轴线的轴向纵截面中在所述中间区域的面向邻接的凸轮的边缘区域中分别与所述凸轮轴的纵轴线隔开径向距离地延伸，所述径向距离等于或仅略小于相应邻接的凸轮的凸轮凸起与所述凸轮轴的纵轴线的径向距离。通过这种构造方式保证，凸轮的加工不会被中间区域妨碍。
根据一个扩展方案，所述中间区域在相应邻接的凸轮之间具有无阶梯的走势。根据这种构造方式能够实现简单地制造中间区域并且避免由于切口作用而引起的应力增加。
根据一个扩展方案，所述中间区域在其面向邻接的凸轮的边缘区域中在包含所述凸轮轴的纵轴线的轴向纵截面中分别至少近似平行于所述凸轮轴的纵轴线地延伸。
根据一个扩展方案，所述中间区域在位于在其面向邻接的凸轮的边缘区域之间的中部区域中在包含所述凸轮轴的纵轴线的轴向纵截面中具有弯曲的走势。
根据一个扩展方案，所述中间区域在位于在其面向邻接的凸轮(的边缘区域之间的中部区域中在包含所述凸轮轴的纵轴线的轴向纵截面中具有相对于所述凸轮轴的纵轴线倾斜的、直的走势。
此外，本发明还提出一种泵、尤其是燃料高压泵，所述泵具有至少两个泵元件，所述泵元件分别具有一个泵活塞，并且所述泵具有根据本发明的凸轮轴，通过该凸轮轴，所述泵活塞至少间接地以升降运动的方式被驱动。
附图说明
在附图中示出并且在下面的说明中详细阐述本发明的多个实施例。附图示出了：图1具有泵元件和凸轮轴的泵的局部纵截面，图2根据第一实施例的在图1中用II标明的凸轮轴的放大的局部视图，图3根据第一实施例的凸轮轴的立体视图，图4根据第二实施例的凸轮轴的局部II，图5在负载下弯曲的根据现有技术的凸轮轴，以及图6在负载下弯曲的根据本发明的凸轮轴。
具体实施方式
在图1至图6中以简化的示图示出泵10，该泵尤其设置为用于在内燃机的燃料喷射装置中的燃料高压输送。泵10具有至少两个泵元件12，所述泵元件分别具有一个壳体部分14，在所述壳体部分中，泵活塞18分别在一个缸孔16中可运动地被引导，所述泵活塞在相应的缸孔16中限界泵工作室20。泵活塞18分别通过一个挺杆22被凸轮轴24以升降运动的方式沿相对于凸轮轴24的旋转轴线25至少近似的径向方向驱动。凸轮轴24的旋转轴线25与其纵轴线是同轴的。凸轮轴24可以是泵10的一部分，或替代地也可以设置，泵10不具有自身的凸轮轴，而凸轮轴24是内燃机的一部分。
凸轮轴24具有两个沿其纵轴线25的方向彼此相继布置的凸轮26、28，用于驱动泵活塞18，所述凸轮可以分别构造为单凸轮或多凸轮，例如构造为180°双凸轮。凸轮26、28绕着凸轮轴24的纵轴线25相对彼此错开或扭转地布置，例如绕着纵轴线25错开约90°。沿凸轮轴24的纵轴线25的方向，在两个凸轮26和28之间存在中间区域30，下面详细地阐述该中间区域。沿凸轮轴24的纵轴线25的方向，在至少一个凸轮26或28旁，优选在两个凸轮26和28旁，在背离中间区域30的一侧上分别设置有凸轮轴24的轴承区域32。
轴承区域32分别构造为圆柱形，并且凸轮轴24通过该轴承区域例如可旋转地支承在相应的滑动轴承中。挺杆22分别构造为滚子挺杆并且在所述滚子挺杆中分别可旋转地支承有滚子34，所述滚子在凸轮26或28上滚动。挺杆22可以分别具有挺杆体36，其中，滚子34在挺杆体36中或在布置在挺杆体36中的滚子靴38中在凹槽中通过所述滚子的外周面按照滑动轴承的类型可旋转地支承。替代地，滚子34也可以实施为空心的并且可转动地支承在保持在挺杆体36中的支承销40上。挺杆22和泵活塞18被挺杆弹簧42向凸轮26或28加载。挺杆22在接收部44中可移动地被引导，其中，接收部44构造在泵10的壳体部分46中或构造在内燃机的壳体部分中。两个泵元件12的壳体部分14可以构造为一体式或者构造为单独的构件并且与壳体部分46连接。
下面详细地阐述凸轮轴24的中间区域30的构造方式。由于凸轮26和28的凸轮凸起绕着凸轮轴24的纵轴线25的相对彼此错开的布置，所述凸轮在包含凸轮轴24的纵轴线25的轴向纵截面中具有与纵轴线25的不同径向距离h1和h2。在轴向纵截面中，凸轮26具有其最大的凸轮凸起，该凸轮凸起具有所述凸轮的上止点，而另一凸轮28具有其最小的凸轮凸起，该凸轮凸起具有所述另一凸轮的下止点。在绕着纵轴线25旋转90°或270°的轴向纵截面中，凸轮26具有其最小的凸轮凸起，该凸轮凸起具有所述凸轮的下止点，而另一凸轮28具有其最大的凸轮凸起，该凸轮凸起具有所述另一凸轮的上止点。在每个轴向纵截面中，根据相应的轴向纵截面的位置得到两个凸轮26、28的不同的凸轮凸起。
中间区域30这样地构造，使得该中间区域在包含凸轮轴24的纵轴线25的轴向纵截面中与纵轴线25隔开径向距离r地延伸，该径向距离从邻接的、在对应的轴纵向截面中具有较小的凸轮凸起h1的凸轮26出发朝向邻接的、在对应的轴向纵截面中具有较大的凸轮凸起h2的凸轮28增大。中间区域30在两个邻接的凸轮26、28之间的走势优选是无阶梯的。由此简化了中间区域30的制造并且不产生能够导致应力增加的切口效应。
在中间区域30的面向邻接的凸轮26、28的边缘区域30a中，该边缘区域在包含纵轴线25的轴向纵截面中与纵轴线25隔开径向距离rl或r2地延伸，所述径向距离等于或略小于相应邻接的凸轮26或28的凸轮凸起的径向距离hl或h2。因此，中间区域30的边缘区域30a在包含纵向轴线25的轴向纵截面中在相对于纵轴线25的径向方向上不超过相应邻接的凸轮26或28的凸轮凸起突出。由此保证，在借助工具、例如磨削工具加工凸轮26、28的凸轮凸起时，沿凸轮轴24的纵轴线25的方向存在足够的空间用于工具的惯性运动(Auslauf)。优选地，中间区域30的边缘区域30a的径向距离rl或r2比邻接的凸轮26或28的凸轮凸起h1或h2小几毫米。中间区域30的边缘区域30a在包含凸轮轴24的纵轴线25的轴向纵截面中例如近似平行于纵轴线25地延伸。因此，在凸轮26、28到中间区域30的边缘区域30a的过渡部上分别存在一个阶梯。
在附图2和3所示的第一实施例中，中间区域30在其在边缘区域30a之间的中部区域30b中在包含凸轮轴24的纵轴线25的轴向纵截面中具有弯曲的走势，该走势优选是连续的并且不具有阶梯和弯折部。在此，在图3中可看到，中间区域30的走势如何在凸轮轴24的周边上相应于邻接的凸轮26、28的凸轮凸起的走势而变化。
在图4所示的第二实施例中，中间区域30在其在边缘区域30a之间的中部区域30b中在包含凸轮轴24的纵轴线25的轴向纵截面中具有直的、相对于纵轴线25倾斜的走势。从中部区域30b到中间区域30的边缘区域30a的过渡部可以如在图4中上方所示的那样构造为具有一个弯折部或者如在图4中下方所示的那样构造为倒圆的。
凸轮轴24例如能够以锻造方法制造，其中，中间区域30的轮廓已经能够很大程度上在锻造工具中产生。如果需要，中间区域30的后续加工例如可以借助切削方法实现。替代地，凸轮轴24也能够以铸造方法或3D打印方法制造，中间区域30的轮廓能够很大程度上在所述铸造方法或3D打印方法中产生。通过之前阐述的中间区域30的构造方式，不会妨碍凸轮26、28的加工。
根据示出凸轮轴的极其简化的原理简图的图5和6，阐明根据本发明的凸轮轴24在负载下相对于根据现有技术的凸轮轴240的减小的弯曲。在图5中示出根据现有技术的凸轮轴240，其中，两个凸轮260和280的负载通过力箭头F表示并且示出凸轮轴的轴承区域232。凸轮轴240的尤其在凸轮260和280之间的中间区域230中的弯曲能够在凸轮轴240的纵轴线250的走势上看出。该弯曲导致凸轮260、280的倾斜，由此，损害滚子挺杆的滚子的贴靠并且导致磨损。在根据图6的凸轮轴24的根据本发明的构造方式中，在纵轴线25的走势上可看出，尤其在中间区域30中存在凸轮轴24的基本上较小的弯曲，使得不出现凸轮26、28的倾斜或仅出现凸轮26、28的轻微倾斜，并且很大程度上保持挺杆22的滚子34的正确贴靠并且因此避免了磨损。

Claims (9)

1.一种凸轮轴，所述凸轮轴具有至少两个沿所述凸轮轴(24)的纵轴线(25)的方向彼此相继布置的凸轮(26、28)，所述凸轮的凸轮凸起绕着所述凸轮轴(24)的纵轴线(25)相对彼此错开地布置，其中，在两个相邻的凸轮(26、28)之间设置有中间区域(30)，并且所述凸轮轴具有至少一个沿所述凸轮轴(24)的纵轴线(25)的方向布置在所述凸轮(26、28)旁的轴承区域(32)，其特征在于，所述中间区域(30)在包含所述凸轮轴(24)的纵轴线(25)的轴向纵截面中与所述凸轮轴(24)的纵轴线(25)隔开径向距离(r1、r2)地延伸，所述径向距离从邻接的、在对应的轴向纵截面中具有较小的凸轮凸起(h1)的凸轮(26)出发朝向邻接的、在对应的轴向纵截面中具有较大的凸轮凸起(h2)的凸轮(28)增大。
2.根据权利要求1所述的凸轮轴，其特征在于，所述中间区域(30)在包含所述凸轮轴(24)的纵轴线(25)的轴向纵截面中在所述中间区域的面向邻接的凸轮(26、28)的边缘区域(30a)中分别与所述凸轮轴(24)的纵轴线(25)隔开径向距离(r1、r2)地延伸，所述径向距离等于或仅略小于相应邻接的凸轮(24)的凸轮凸起与所述凸轮轴(24)的纵轴线(25)的径向距离(h1、h2)。
3.根据权利要求1或2所述的凸轮轴，其特征在于，所述中间区域(30)在相应邻接的凸轮(26、28)之间具有无阶梯的走势。
4.根据权利要求1或2所述的凸轮轴，其特征在于，所述中间区域(30)在其面向邻接的凸轮(26、28)的边缘区域(30a)中在包含所述凸轮轴(24)的纵轴线(25)的轴向纵截面中分别至少近似平行于所述凸轮轴(24)的纵轴线(25)地延伸。
5.根据权利要求1或2所述的凸轮轴，其特征在于，所述中间区域(30)在位于在其面向邻接的凸轮(26、28)的边缘区域(30a)之间的中部区域(30b)中在包含所述凸轮轴(24)的纵轴线(25)的轴向纵截面中具有弯曲的走势。
6.根据权利要求1或2所述的凸轮轴，其特征在于，所述中间区域(30)在位于在其面向邻接的凸轮(26、28)的边缘区域(30a)之间的中部区域(30b)中在包含所述凸轮轴(24)的纵轴线(25)的轴向纵截面中具有相对于所述凸轮轴(24)的纵轴线(25)倾斜的、直的走势。
7.根据权利要求1所述的凸轮轴，其特征在于，所述凸轮轴设置为用于泵。
8.一种泵，所述泵具有至少两个泵元件(12)，所述泵元件分别具有一个泵活塞(18)，并且所述泵具有凸轮轴(24)，通过所述凸轮轴，所述泵活塞(18)至少间接地以升降运动的方式被驱动，其特征在于，所述凸轮轴(24)是根据前述权利要求中任一项所述的凸轮轴。
9.根据权利要求8所述的泵，其特征在于，所述泵是燃料高压泵。
CN201880054473.6A 2017-08-23 2018-07-27 用于泵、尤其燃料高压泵的凸轮轴和具有凸轮轴的泵 Active CN110998090B (zh)

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