WO2020005244A1 - Retenue de rattrapeur de jeu hydraulique dans un ensemble levier oscillant - Google Patents

Retenue de rattrapeur de jeu hydraulique dans un ensemble levier oscillant Download PDF

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Publication number
WO2020005244A1
WO2020005244A1 PCT/US2018/039915 US2018039915W WO2020005244A1 WO 2020005244 A1 WO2020005244 A1 WO 2020005244A1 US 2018039915 W US2018039915 W US 2018039915W WO 2020005244 A1 WO2020005244 A1 WO 2020005244A1
Authority
WO
WIPO (PCT)
Prior art keywords
bore
rocker lever
lash adjuster
hydraulic lash
retention device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2018/039915
Other languages
English (en)
Inventor
Jason W. MACKEY
Darren Yaoshun Ting
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cummins Inc
Original Assignee
Cummins Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cummins Inc filed Critical Cummins Inc
Priority to PCT/US2018/039915 priority Critical patent/WO2020005244A1/fr
Publication of WO2020005244A1 publication Critical patent/WO2020005244A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L1/18—Rocking arms or levers
    • 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
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
    • 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

Definitions

  • the present disclosure relates generally to a rocker lever arm assembly, and more particularly but not exclusively to retention of a hydraulic lash adjuster with a rocker lever arm.
  • An internal combustion engine can include a hydraulic lash adjuster assembled with a rocker lever arm.
  • Hydraulic lash adjusters are very small items in size compared to the rocker lever arm with which they are assembled and even smaller in size when compared to the engine.
  • engines are built in a mass production and assembly line format wherein a worker manipulates and handles the hydraulic lash adjuster to assemble it with the rocker lever arm. Assembly of these parts is time consuming and often difficult given the relative difference in size of parts.
  • a second type of clip is a load biasing clip that includes legs to resiliently engage opposite sides of a wall of a rockable actuator member. The legs frictionally grip the lash adjuster that is engaged with the actuator member. In this technique, the legs may become distorted during use and decrease the grip on the lash adjuster decreasing performance of the device.
  • the present application incorporates a retention device with a hydraulic lash adjuster (HLA) in a rocker lever arm to form a rocker lever arm assembly for the primary benefit of retaining the HLA with the rocker lever arm.
  • HLA hydraulic lash adjuster
  • the HLA can be easily and quickly disassembled or removed from the rocker lever arm since the retention device is easily accessible on the exterior of the rocker lever arm.
  • the retention device is also easily dis-assembled and can be quickly re-assembled in the event the HLA needs to be replaced.
  • the retention device helps contain and retain the HLA within the rocker lever arm during engine operation. Moreover the engagement of the annular groove of the HLA with the retention device retains the HLA in the rocker lever arm during engine operation. The engagement of the retention device with the annular groove does not impede movement of the HLA during operation of the HLA. [00010]
  • the HLA, retention device, and rocker lever arm are assembled together such that when the rocker lever arm assembly is removed from the engine, the HLA is removed with it. There is no chance that the HLA will be lost in some part of the engine wherein the HLA cannot be easily and quickly retrieved.
  • the HLA remains securely assembled with the rocker lever arm until the retention device is removed.
  • the complete rocker lever assembly including the retention device, HLA, and rocker lever arm reduces servicing costs.
  • FIG. 1 is a perspective view of a rocker lever arm, a retention device, and hydraulic lash adjuster in a dis-assembled configuration of the present disclosure
  • FIG. 2 is a bottom view of the rocker lever arm shown in FIG. 1 ;
  • FIG. 3 is a partial view of the rocker lever arm shown in FIG. 2;
  • FIG. 4 is a perspective view of the rocker lever arm, retention device, and hydraulic lash adjuster shown in FIG. 1 in a pre-assembly state;
  • FIG. 5 is a perspective view of the rocker lever arm, retention device, and hydraulic lash adjuster shown in FIG. 1 in an assembled state;
  • FIG. 6 is a side view of the rocker lever arm, retention device, and hydraulic lash adjuster shown in FIG. 5;
  • FIG. 7A is a side view of A-A cross section of the rocker lever arm, retention device, and hydraulic lash adjuster shown in FIG. 6 wherein the hydraulic lash adjuster is fully collapsed;
  • FIG. 7B is a side view of A-A cross section of the rocker lever arm, retention device, and hydraulic lash adjuster shown in FIG. 6 wherein the hydraulic lash adjuster is fully extended.
  • the present invention is premised on a combination of a retention device for a hydraulic lash adjuster (HLA) assembled with a rocker lever arm.
  • the retention device is easily accessible relative to the HLA and the rocker lever arm.
  • the retention device can quickly assemble the HLA with the rocker lever arm to thereby retain the HLA in the rocker lever arm.
  • the retention device can also be quickly removed from the HLA and the rocker lever arm to thereby dis-assemble the HLA from the rocker lever arm.
  • FIG. 1 depicts a rocker lever sub-assembly 10 that includes a rocker lever arm 12 and a retention device 14.
  • the rocker lever sub-assembly 10 can also include an HLA 16.
  • FIGS. 1-3 depict the rocker lever arm 12 having a bore wall 20 that surrounds a first bore 22 that is configured to receive at least part of the HLA 16 therein.
  • the bore wall 20 has a second bore 24 configured to intersect the first bore 22.
  • the bore wall 20 defines a retention bore 26 at the location of the intersection of the first bore 22 and the second bore 24.
  • the second bore 24 is perpendicular to the first bore 22.
  • the second bore 24 is not perpendicular to the first bore 22.
  • the first bore 22 is sized to receive the HLA 16 and has a diameter that corresponds to a diameter of the HLA 16.
  • the first bore 22 has a length sufficient to receive a portion or all of the HLA 16 therein.
  • the second bore 24 is sized and configured to receive the retention device 14 therein.
  • the second bore 24 is cylindrical.
  • the second bore 24 can have a different cross-sectional shape such as square, rectangular, or oval to name a few.
  • the bore wall 20 includes an outer wall 25 configured to house the second bore 24 therein.
  • the outer wall 25 has a length and thickness sufficient to receive the second bore 24.
  • the second bore 24 is positioned along the bore wall 20 such that when the HLA 16 is assembled with the first bore 22, the second bore 24 is adjacent to an annular groove of the HLA 16 as illustrated in FIGS. 7A and 7B.
  • the retention bore 26 is sized to receive and retain a portion of the retention device 14 therein.
  • the retention bore 26 spans from the intersection of the second bore 24 to the first bore 22.
  • the retention bore 26 is positioned along the bore wall 20 such that when the HLA 16 is assembled with the first bore 22, the retention bore 26 is adjacent to the annular groove of the HLA 16 as illustrated in FIGS. 7 A and 7B.
  • the retention device 14 is configured for insertion into the second bore 24 and the first bore 22 to retain the HLA 16 assembled with the first bore 22.
  • the retention device 14 is configured to assemble with the retention bore 26.
  • the retention device 14 is a pin, roll pin, or a dowel pin.
  • the retention device 14 is a clip fastening mechanism that is configured to interact with the second bore 24, the retention bore 26, and the HLA 16 to secure the HLA 16 with the first bore 22.
  • the retention device 14 is configured for removal from the second bore 24 and the first bore 22 to disassemble the HLA 16 from the first bore 22.
  • the HLA 16 includes a cylindrical body 30 from which projects the lash adjusting cylindrical plunger 32 having a semi-spherical end 34 including a central oil hole 36.
  • the body 30 includes an annular groove 40 on an outer surface through which oil is received into the HLA 16 for actuating the lash adjusting functions and supplying oil through the hole 36 of the plunger 32.
  • the annular groove 40 is sized to receive a portion of the retention device 14 when the retention device 14 is inserted in the annular groove 40.
  • the retention device 14 is configured to engage the annular groove 40 to retain the HLA 16 in the first bore 22.
  • the rocker lever arm 12 is pivoted on an axle 50 in a cylinder head, not shown.
  • FIG. 1 depicts the rocker lever arm 12, retention device 14, and HLA 16 in a dis-assembled configuration.
  • the rocker lever arm 12, retention device 14, and HLA 16 are shown in FIG. 4 in a pre-assembly state wherein the HLA 16 is inserted into the first bore 22 however the HLA 16 is not retained in the first bore 22 by the retention device 14.
  • FIG. 5 the rocker lever arm 12, the retention device 14, and HLA 16 are shown in an assembled state, wherein the HLA 16 is inserted in the first bore 22 and the retention device 14 is inserted in the second bore 24 and the retention bore 26 to retain the HLA 16 in the first bore 22.
  • FIGS. 6, 7A, and 7B illustrate actuation of the HLA 16 from a fully collapsed position illustrated in FIG. 7A to a fully extended position illustrated in FIG. 7B.
  • the HLA 16 moves in the first bore 22 relative to the retention device 14 retained in the retention bore 26.
  • the annular groove 40 of the HLA 16 engages the retention device 14 when the lash adjusting cylindrical plunger 32 actuates.
  • the retention device 14 ca be removed from the second bore 24 and the retention bore 26 to dis-assemble the HLA 16 from the rocker lever arm 12.
  • a rocker lever sub-assembly for use with a hydraulic lash adjuster, the rocker lever sub-assembly includes a rocker lever arm having a bore wall that surrounds a first bore configured to receive at least part of the hydraulic lash adjuster therein, the bore wall having a second bore that intersects the first bore; and a retention device configured for insertion into the second bore and the first bore to retain the hydraulic lash adjuster assembled with the first bore.
  • the rocker lever sub-assembly further includes a hydraulic lash adjuster having an annular groove; and wherein the retention device is inserted in the annular groove.
  • the rocker lever sub-assembly includes the second bore is positioned along the bore wall adjacent the annular groove of the hydraulic lash adjuster.
  • the retention device is a clip.
  • the retention device is a pin.
  • the bore wall includes an outer wall configured to house the second bore therein.
  • the bore wall defines a retention bore at the location of intersection of the first bore and the second bore.
  • a rocker lever sub-assembly for use with a hydraulic lash adjuster includes a rocker lever arm having a first bore that intersects a second bore at an retention bore, the first bore configured to receive at least part of the hydraulic lash adjuster, the second bore configured to receive a retention device; and a retention device configured to retain the hydraulic lash adjuster with the first bore when the retention device is assembled with the second bore and the retention bore.
  • a hydraulic lash adjuster has an annular groove, and the retention device is configured to engage the annular groove to retain the hydraulic lash adjuster in the first bore.
  • the second bore is adjacent to the annular groove of the hydraulic lash adjuster when the hydraulic lash adjuster is assembled with the first bore.
  • the retention device is a clip.
  • the retention device is a pin.
  • the bore wall includes an outer wall configured to house the second bore therein.
  • the retention device is configured for removal from the second bore and the first bore to disassemble the hydraulic lash adjuster from the first bore.
  • a method includes inserting a hydraulic lash adjuster in a first bore of a rocker lever arm, the rocker lever arm defining a second bore that intersects the first bore at a retention bore; and inserting a retention device in the second bore and the retention bore to retain the hydraulic lash adjuster with the rocker lever arm.
  • the hydraulic lash adjuster has an annular groove; and the method includes inserting the retention device in the annular groove.
  • the method includes actuating the hydraulic lash adjuster relative to the retention device within the first bore.
  • the method further includes after the inserting the retention device, removing the retention device from the second bore and the retention bore to dis-assemble the hydraulic lash adjuster from the rocker lever arm.
  • implementation may be associated with one or more embodiments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Un sous-ensemble de levier oscillant destiné à être utilisé avec un rattrapeur de jeu hydraulique comprend un bras de levier oscillant ayant une paroi d'alésage qui entoure un premier alésage configuré pour recevoir au moins une partie du rattrapeur de jeu hydraulique à l'intérieur de celui-ci, la paroi d'alésage ayant un second alésage qui coupe le premier alésage, et un dispositif de retenue destiné à être inséré dans les premier et second alésages pour retenir le rattrapeur de jeu hydraulique assemblé avec le premier alésage. La paroi d'alésage définit un alésage de retenue à l'intersection des premier et second alésages. Le second alésage est positionné le long de la paroi d'alésage pour positionner le dispositif de retenue dans la rainure annulaire du rattrapeur de jeu hydraulique de telle sorte que le rattrapeur de jeu hydraulique peut actionner le dispositif de retenue. Le dispositif de retenue peut être retiré du second alésage pour désassembler le rattrapeur de jeu hydraulique du premier alésage.
PCT/US2018/039915 2018-06-28 2018-06-28 Retenue de rattrapeur de jeu hydraulique dans un ensemble levier oscillant Ceased WO2020005244A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2018/039915 WO2020005244A1 (fr) 2018-06-28 2018-06-28 Retenue de rattrapeur de jeu hydraulique dans un ensemble levier oscillant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2018/039915 WO2020005244A1 (fr) 2018-06-28 2018-06-28 Retenue de rattrapeur de jeu hydraulique dans un ensemble levier oscillant

Publications (1)

Publication Number Publication Date
WO2020005244A1 true WO2020005244A1 (fr) 2020-01-02

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PCT/US2018/039915 Ceased WO2020005244A1 (fr) 2018-06-28 2018-06-28 Retenue de rattrapeur de jeu hydraulique dans un ensemble levier oscillant

Country Status (1)

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WO (1) WO2020005244A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080041326A1 (en) * 2002-10-24 2008-02-21 Helmut Engelhardt Finger lever of a valve train of an internal combustion engine
US20080245327A1 (en) * 2007-04-07 2008-10-09 Wolfgang Christgen Valve train of an internal combustion engine
US20090145388A1 (en) * 2007-12-07 2009-06-11 Naoki Hiramatsu Valve gear and rocker ARM unit
US20110000451A1 (en) * 2007-09-18 2011-01-06 Koyo Bearings Usa Llc Coupling device
US20110017160A1 (en) * 2008-03-07 2011-01-27 Otics Corporation Rocker arm unit and method of assembling rocker arm unit
US20110041791A1 (en) * 2009-08-18 2011-02-24 Otics Corporation Rocker arm unit
US20130306015A1 (en) * 2012-05-18 2013-11-21 Otics Corporation Lubrication structure for rocker arm
US20150308300A1 (en) * 2014-04-28 2015-10-29 Schaeffler Technologies AG & Co. KG Rocker arm clip retention feature
US20160265394A1 (en) * 2015-03-10 2016-09-15 GT Technologies Rocker arm assembly for use in a valvetrain of a cylinder head of an internal combustion engine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080041326A1 (en) * 2002-10-24 2008-02-21 Helmut Engelhardt Finger lever of a valve train of an internal combustion engine
US20080245327A1 (en) * 2007-04-07 2008-10-09 Wolfgang Christgen Valve train of an internal combustion engine
US20110000451A1 (en) * 2007-09-18 2011-01-06 Koyo Bearings Usa Llc Coupling device
US20090145388A1 (en) * 2007-12-07 2009-06-11 Naoki Hiramatsu Valve gear and rocker ARM unit
US20110017160A1 (en) * 2008-03-07 2011-01-27 Otics Corporation Rocker arm unit and method of assembling rocker arm unit
US20110041791A1 (en) * 2009-08-18 2011-02-24 Otics Corporation Rocker arm unit
US20130306015A1 (en) * 2012-05-18 2013-11-21 Otics Corporation Lubrication structure for rocker arm
US20150308300A1 (en) * 2014-04-28 2015-10-29 Schaeffler Technologies AG & Co. KG Rocker arm clip retention feature
US20160265394A1 (en) * 2015-03-10 2016-09-15 GT Technologies Rocker arm assembly for use in a valvetrain of a cylinder head of an internal combustion engine

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