CN113882985A - 用于高压燃料泵的挺杆 - Google Patents

用于高压燃料泵的挺杆 Download PDF

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CN113882985A
CN113882985A CN202110672266.0A CN202110672266A CN113882985A CN 113882985 A CN113882985 A CN 113882985A CN 202110672266 A CN202110672266 A CN 202110672266A CN 113882985 A CN113882985 A CN 113882985A
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housing
pin
tappet
intermediate ring
cam roller
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诺伯特·盖尔
马可·容克
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Schaeffler Holding China Co Ltd
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Schaeffler Technologies AG and Co KG
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    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
    • F01L3/04—Coated valve members or valve-seats
    • 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
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • 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
    • F04B1/0408—Pistons
    • 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
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • 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
    • F04B1/0439—Supporting or guiding means for the pistons
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • F16H53/06—Cam-followers
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • F01L2305/02—Mounting of rollers
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9038—Coatings
    • 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

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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)

Abstract

提出一种高压燃料泵的挺杆(1)，挺杆(1)具有壳体(2)，在壳体的驱动侧的端部(3)中布置有两个在直径上对置的孔(4)，在孔的里面具有销栓(5)，凸轮滚子(7)经由中间环(6)在销栓上运动，其中，沿轴向在凸轮滚子(7)下方，桥形件(8)位于挺杆(1)内，桥形件的朝向壳体(2)的从动侧的端部(9)的下侧(10)具有用于随动件的贴靠部(11)，其中，在外表面(12)上未涂覆的所述销栓(5)以及在其孔(13)上未涂覆的所述中间环(6)通过压配合彼此接合，并且其中，销栓(5)能够相对于壳体(2)的孔(4)自由旋转运动，以及滚子组件的轴向固定仅通过中间环(6)以其外端面(14)在壳体(2)的内壁(15)上的止推来进行。

Description

用于高压燃料泵的挺杆
技术领域
本发明涉及一种具有滑动支承的凸轮滚子的挺杆，所述挺杆设置用于内燃机的高压燃料泵并且具有壳体，在壳体的驱动侧的端部中布置有两个在直径上对置的孔，在孔里面具有销栓，凸轮滚子经由中间环在销栓上运动，其中，沿轴向在凸轮滚子下方，桥形件位于挺杆内，桥形件的朝向壳体的从动侧的端部的下侧具有用于随动件的贴靠部。
背景技术
由DE 10 2018 120 265A1的图2和第[0013]段中得知一种具有滑动支承的滚子组件的所述类型的挺杆，所述滚子组件具有在销栓和凸轮滚子之间的中间环。上述构件可彼此相对旋转运动，其中，分别在a)所述销栓和所述中间环之间的环形间隙上以及在b)所述中间环和所述凸轮滚子之间的环形间隙上在运行中存在液力滑动轴承。在两个环形缝隙处涉及的配对表面设有降低摩擦和磨损的硬质材料层(DLC层)，所述硬质材料层在涂覆后还要经受刷涂过程。通过经由径向点铆接或敛缝扩大其端部实现销栓的轴向固定，其中，也已知卡环固定装置。
DE 10 2009 013 130A1公开了一种如上所述的然而具有滚针支承的凸轮滚子的挺杆。
发明内容
任务是设计一种挺杆，所述挺杆适合于泵传动装置中的非常高的负载和高的转速并且同时可以廉价地制造。
根据本发明，所述任务通过以下方式解决，即，在外表面上未涂覆的销栓以及在其孔上未涂覆的中间环彼此通过压配合接合，其中，销栓能够相对于壳体的孔自由旋转运动，并且滚子组件的轴向固定仅通过中间环以其外端面在壳体的内壁上的止推(Anlauf)来进行。
因此，液力滑动轴承仅在中间环和凸轮滚子之间的处于径向外部的环形间隙上移动，而在径向内部的环形间隙上，在销栓和中间环之间现在实现持久的压配合复合结构并且因此不再发生相对旋转。
纯粹在功能上，上述具有的优点是，通过仅在较大直径上形成的滑动轴承而存在较高的圆周速度，并且因此显著改善了弹性液力润滑。固体摩擦和混合摩擦的份额减小。这种支承能出色地承受驱动机构(凸轮轴、曲轴、平衡轴或辅助轴)的持续上升的泵压力和转速。
同时，在表面质量方面仅作为“标准滚动轴承复合结构”存在的压配合复合结构中，可以安装具有较小直径的销栓，从而例如壳体的两个销栓孔可以相对靠近壳体的上侧环形端部。同时，现在可以使用较薄构造的环形凸轮滚子，从而所述凸轮滚子由于其质量小而相对“容易旋转”，并且在运行中，例如在起动/加速运转时，由于已知的磨损标记而出现很少的滑移。可以省去从背景技术中已知的具有薄凸轮环的阶梯式的销栓，销栓仅能毫无问题地安装到壳体的U形袋状部中。
此外，通过取消在销栓的外表面与中间环的孔之间迄今为止主要的硬质材料覆层以及接着的对表面的涂刷，降低了制造成本。虽然组装过程在涂覆腔上是可自动化的，然而，主要是复杂的手动供送(穿引)和移除。
要与中间环压紧的销栓在此在侧面引导到壳体的孔中的一个孔上，其中，中间环与装配在其上的滚子一起被保持在壳体的内部空间中。然后，通过冲头或类似物将销栓与中间环压紧。
本发明还具有的优点是，可以放弃目前主要的通过在完全硬化的销栓上的敛缝/径向点铆接等进行的耗费力的固定，其这种固定伴随例如影响壳体或甚至其经磨削的滚道(外表面)或松开所述连接的风险。因此，滚子组件和销栓的轴向固定仅通过中间环经由其外端面在壳体的内表面上的止推实现。凸轮滚子的外端面相对于中间环的外端面稍微拉入。
为了提高滚子组件的耐载荷性和耐磨性，在本发明的特别优选的改进方案中提出，给“剩余的”滑动轴承的环形间隙配合部中的至少一个环形间隙配合部设置硬质材料层如DLC层。
同样地或与此无关地，在壳体的孔区域中延伸的销栓的环形区段也可以被涂覆硬质材料，从而在能旋转运动的销栓的区域中的摩擦和磨损被最小化。必要时，销栓也可以在孔中的衬套上移动。
同样地，单独地或与最后提到的设计措施一起，中间环的在壳体的内表面上止推的外端面可以构造有涂覆的硬质材料层或者内表面也可以构造有涂覆的硬质材料层。
附图说明
对于附图：
图1以整体立体图示出挺杆；
图2示出挺杆沿滚子轴线的纵截面，和
图3示出挺杆相对于图2旋转90°的截面图。
具体实施方式
图1从挺杆的基本已知的结构示出挺杆1，也称为滚子挺杆或泵挺杆。挺杆1具有空心柱体形的壳体2，在壳体的驱动侧的端部3中，两个沿直径对置的孔4处于缩进的展平部24中。在孔4中放置有相对于所述孔可旋转且可略微轴向运动的销栓5，销栓通过中间环6承载凸轮滚子7。沿轴向在凸轮滚子7的下方安装有薄壁的桥形件8(参见图2、图3)，所述桥形件的朝向壳体2的从动侧的端部9的下侧10具有用于随动件(泵活塞)的贴靠部11。
在此优选完全硬化的销栓5通过其外表面12与中间环6的孔13持久地压紧。就此而言，在该径向内部的环形区域上不存在滑动轴承。上述接触区域的表面质量被降低到“标准滚动轴承”的程度。
仅使得薄壁的凸轮滚子7相对于现在固定的中间环6保持可旋转运动，其中，不必解释的是，液力滑动轴承仅在中间环6的外表面23与凸轮滚子7的内表面16之间形成。外表面23和内表面16设置有DLC层。
滚子组件通过中间环6以其外端面14在壳体2的内壁15上的止推而受到轴向固定。
附图标记列表
1 挺杆
2 壳体
3 端部
4 孔
5 销栓
6 中间环
7 凸轮滚子
8 桥形件
9 端部
10 下侧
11 贴靠部
12 外表面
13 孔
14 外端面
15 内壁
16 内表面
17 硬质材料层
18 硬质材料层
19 环形区段
20 硬质材料层
22 硬质材料层
23 外表面
24 展平部

Claims (4)

1.一种具有滑动支承的凸轮滚子(7)的挺杆(1)，所述挺杆(1)设置用于内燃机的高压燃料泵并且具有壳体(2)，在所述壳体的驱动侧的端部(3)中布置有两个在直径上对置的孔(4)，在所述孔的里面具有销栓(5)，所述凸轮滚子(7)经由中间环(6)在所述销栓上运动，其中，沿轴向在所述凸轮滚子(7)下方，桥形件(8)位于所述挺杆(1)内，所述桥形件的朝向所述壳体(2)的从动侧的端部(9)的下侧(10)具有用于随动件的贴靠部(11)，其特征在于，在外表面(12)上未涂覆的所述销栓(5)以及在其孔(13)上未涂覆的所述中间环(6)通过压配合彼此接合，其中，所述销栓(5)能够相对于所述壳体(2)的孔(4)自由旋转运动，并且包括所述销栓(5)、所述中间环(6)以及所述凸轮滚子(7)的滚子组件的轴向固定仅仅通过所述中间环(6)以其外端面(14)在所述壳体(2)的内壁(15)上的止推来进行。
2.根据权利要求1所述的挺杆，其特征在于，所述中间环(6)的外表面(23)和/或所述凸轮滚子(7)的内表面(16)具有涂覆的硬质材料层(17、18)。
3.根据权利要求1所述的挺杆，其特征在于，所述销栓(5)完全硬化并且仅仅在所述销栓的、外表面(12)处在所述壳体(2)的孔(4)中的环形区段(19)设有涂覆的硬质材料层(20)。
4.根据权利要求1所述的挺杆，其特征在于，在所述中间环(6)的外端面(14)上施加硬质材料层(22)。
CN202110672266.0A 2020-07-01 2021-06-17 用于高压燃料泵的挺杆 Pending CN113882985A (zh)

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Application Number Priority Date Filing Date Title
DE102020117258.3 2020-07-01
DE102020117258.3A DE102020117258A1 (de) 2020-07-01 2020-07-01 Stößel für eine Kraftstoffhochdruckpumpe

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CN113882985A true CN113882985A (zh) 2022-01-04

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Publication number Priority date Publication date Assignee Title
DE102009013130A1 (de) 2009-03-13 2010-09-16 Schaeffler Technologies Gmbh & Co. Kg Stössel
DE102018120265A1 (de) 2018-08-21 2020-02-27 Schaeffler Technologies AG & Co. KG Stößel für eine Kraftstoffpumpe oder für einen Ventiltrieb

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