US20110253088A1 - Structural unit for a gas exchange valve train of an internal combustion engine - Google Patents

Structural unit for a gas exchange valve train of an internal combustion engine Download PDF

Info

Publication number
US20110253088A1
US20110253088A1 US13/079,186 US201113079186A US2011253088A1 US 20110253088 A1 US20110253088 A1 US 20110253088A1 US 201113079186 A US201113079186 A US 201113079186A US 2011253088 A1 US2011253088 A1 US 2011253088A1
Authority
US
United States
Prior art keywords
projections
joint
structural unit
joint head
support element
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.)
Abandoned
Application number
US13/079,186
Other languages
English (en)
Inventor
Matthew Evans
Michael KANDOLF
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to US13/079,186 priority Critical patent/US20110253088A1/en
Assigned to SCHAEFFLER TECHNOLOGIES GMBH & CO. KG reassignment SCHAEFFLER TECHNOLOGIES GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EVANS, MATTHEW, KANDOLF, MICHAEL
Publication of US20110253088A1 publication Critical patent/US20110253088A1/en
Assigned to Schaeffler Technologies AG & Co. KG reassignment Schaeffler Technologies AG & Co. KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
Abandoned legal-status Critical Current

Links

Images

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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-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
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head 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
    • 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
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
    • 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

Definitions

  • the invention concerns a structural unit for a gas exchange valve train of an internal combustion engine.
  • the structural unit comprises a support element comprising a joint head and a valve lever comprising a joint socket which, together with the joint head, forms a joint for a pivotal mounting of the valve lever on the support element, said structural unit further comprising an anti-loss device arranged on the joint, said anti-loss device comprising one or more projections extending on the opening of the joint socket while being directed toward the center of the joint socket, which projections retain the valve lever secure against loss on the support element through a positive-engagement behind a recess situated axially adjacent to the joint head.
  • Structural assemblies of the pre-cited type made up of a valve lever and a support element serve to minimize the risk of a possible mounting error of the valve lever in the internal combustion engine.
  • the mounting error could particularly consist in that the valve lever is mounted twisted through 180° in the gas exchange valve train.
  • the contact partners, joint head of the support element and joint socket of the valve lever could switch positions with the associated contact surface on the valve lever. This would lead at least to a malfunctioning of the valve train, and in the worst case, to serious damage to the engine.
  • the anti-loss device thus has the function of reliably excluding a falling-apart of the structural unit due to transportation movements before it is mounted in the internal combustion engine.
  • the anti-loss device is usually a retention clip made as a separate part and mounted on the valve lever.
  • Prior art retention clips are made of flat or round stock as disclosed, for instance in DE 196 17 523 A1.
  • the positive-engagement connection between the valve lever and the support element is realized by the fact that during insertion of the joint head into the joint socket, the projections of the retention clip are elastically spread away from the center of the joint socket to subsequently snap into the recess under the joint head.
  • positive-engagement anti-loss devices provide an unobstructed pivotal moving ability of the valve lever on the support element.
  • the object of the present invention is to provide a structural unit of the aforesaid type with less complexity and/or lower manufacturing costs.
  • the projections are configured in one piece with the joint socket.
  • the invention omits the hitherto used retention clip which is made as a separate component from the valve lever and the support element and has to be mounted in a separate assembly step and replaces its function through the projection or projections integrated in the valve lever.
  • the valve lever comprises a lever body that is shaped out of sheet metal and is therefore less expensive, each of the projections being integrally formed on the lever body by an embossing or a stamping of the material delimiting the joint socket and said projections being directed toward the opening of the joint socket.
  • the valve lever can be a finger lever which is centrally loaded through the lift of a cam, one end section of the lever body being mounted on the support element and the other end section of the lever body serving to actuate the gas exchange valve. It is further also possible to use a rocker arm centrally mounted on the support element, wherein the one end section of the lever body is loaded by the lift of a cam and the other end of the lever body serves to actuate the gas exchange valve.
  • lever body shaped out of sheet metal it may be required in specific fields of use to provide a lever body shaped by forming by casting, forging or sintering, in which case the projections are integrally formed by a corresponding shaping of the creative forming tool.
  • two projections offset from each other by 180° are provided.
  • these projections are oriented relative to the joint socket such that, a connecting line of the projections extends at right angles to the plane of pivoting of the valve lever.
  • the projections extend in the relatively weakly loaded region of the joint socket, so that the size of the highly loaded contact surfaces of the joint socket extending in the plane of pivoting remains unprejudiced as compared to prior art anti-loss devices using retention clips.
  • the joint head is completely circular in shape.
  • the inner spacing of the projections is smaller than the largest diameter of the joint head and is dimensioned such that the projections are elastically resilient relative to the joint head at the largest diameter of the joint head.
  • the joint head is completely spherical and an adjoining annular groove is provided under the joint head as is the case in prior art support elements.
  • the otherwise usual retention clip is replaced by the fact that, during the assembly of the structural unit, the projections deflect elastically relative to the joint head when this is pressed into the joint socket during assembly and then snap into the annular groove thus forming a positive-engagement anti-loss device.
  • the joint head is circular in shape and comprises flattened regions complementary in shape to the projections.
  • the inner spacing of the projections is smaller than the largest diameter of the joint head and substantially equal to or larger than the outer spacing of the flattened regions.
  • the assembly of this structural unit is performed in that the projections and the flattened regions are oriented radially aligned to each other during the then low-force insertion of the joint head into the joint socket to be twisted subsequently relative to each other to form the positive-engagement anti-loss device.
  • FIG. 1 a valve lever according to the invention in a perspective underside view of the joint socket
  • FIG. 2 a support element according to the invention in a perspective side view of the joint head
  • FIG. 3 a structural unit made up of the valve lever of FIG. 1 and the support element of FIG. 2 ;
  • FIG. 4 a prior art support element in a perspective side view for forming a structural unit according to the invention comprising the valve lever of FIG. 1 ;
  • FIG. 5 the valve lever of FIG. 1 in a perspective top view of the joint socket
  • FIG. 6 the structural unit of FIG. 3 in a cross-sectional view
  • FIG. 7 a partial view of a prior art gas exchange valve train.
  • a valve lever configured as a finger lever 1 comprises a lever body 2 which is made by cold shaping out of a sheet metal and possesses on a first end section a contact surface for actuating the gas exchange valve 3 and carries in its center section a rolling bearing-mounted roller 4 which serves as a low-friction contact surface for the cam 5 of a camshaft.
  • a cup-shaped joint socket 6 ′ which forms a joint with a spherical joint head 7 ′ of a, in the present case, hydraulic valve lash adjusting support element 8 mounted statically in the internal combustion engine.
  • the finger lever 1 is mounted for pivoting on the support element 8 .
  • a retention clip 9 arranged on the joint the finger lever 1 and the support element 8 are assembled together into a structural unit secured against loss by the fact that the retention clip 9 engages into a recess in the form of an annular groove 10 extending under the joint head 7 ′ and axially adjoining the joint head 7 ′, and that the retention clip 9 engages positively behind the joint head 7 ′.
  • a finger lever 1 according to the invention for forming a structural unit secured against loss in which a separate component as an anti-loss device is neither necessary nor provided, is disclosed in FIG. 1 .
  • the anti-loss feature is created through projections 11 which are formed integrally with the joint socket 6 and extend on the opening of the joint socket 6 while being directed toward the center of the joint socket 6 .
  • the two identically configured projections 11 are arranged offset at 180° from each other and oriented such that a connecting line of the projections 11 extends at right angles to the plane of pivoting of the finger lever 1 .
  • the structural unit illustrated in FIG. 3 can be formed out of the finger lever 1 of FIG. 1 and the support element 8 of FIG. 2 .
  • the joint head 7 of the support element 8 is circular in shape and comprises two flattened regions 12 , only one being visible in the figure, and have a shape complementary to that of the projections 11 .
  • the inner spacing of the projections 11 identified at S 1 and the outer spacing of the flattened regions 12 identified at S 3 are substantially equal in size, while the inner spacing S 1 of the projections 11 is clearly smaller than the largest diameter S 2 of the joint head 7 at the transition to the annular groove 10 and—for the purpose of an unobstructed pivoting ability of the finger lever 1 —obviously, somewhat larger than the diameter of the annular groove 10 .
  • the assembly of the structural unit is performed in that the projections 11 and the flattened regions 12 are oriented radially aligned to one another to enable a low-force insertion of the joint head 7 into the joint socket 6 .
  • the projections 11 and the flattened regions 12 are then twisted through about 90° relative to each other, as illustrated in FIG. 3 .
  • a structural unit (not illustrated) according to the invention can also be formed by the finger lever 1 of FIG. 1 and a prior art support element 8 of FIG. 4 whose joint head 7 likewise has a spherical shape but is completely circular in shape at the transition to the adjoining annular groove 10 .
  • the projections 11 are configured to be elastically yielding relative to the joint head 7 at the largest diameter S 2 of the joint head 7 at the transition to the annular groove 10 .
  • the projections 11 can deflect in radial direction and form the positive-engagement anti-loss device behind the joint head 7 by snapping into the annular groove 10 .
  • the elastic yielding character of the projections 11 is achieved through their appropriate shaping and dimensioning, the inner spacing S 1 of the projections 11 being somewhat smaller than the largest diameter S 2 of the joint head 7 .
  • FIGS. 5 and 6 show the result of this shaping step.
  • FIG. 5 shows a view of the closed side of the joint socket 6 with two stampings 13 directed toward the opening of the joint socket 6 and made in the material delimiting the joint socket 6 .
  • FIG. 6 shows in a cross-sectional view through the joint socket 6 , the projections 11 generated on the joint socket 6 through the stampings 13 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US13/079,186 2010-04-15 2011-04-04 Structural unit for a gas exchange valve train of an internal combustion engine Abandoned US20110253088A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/079,186 US20110253088A1 (en) 2010-04-15 2011-04-04 Structural unit for a gas exchange valve train of an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32443110P 2010-04-15 2010-04-15
US13/079,186 US20110253088A1 (en) 2010-04-15 2011-04-04 Structural unit for a gas exchange valve train of an internal combustion engine

Publications (1)

Publication Number Publication Date
US20110253088A1 true US20110253088A1 (en) 2011-10-20

Family

ID=44730888

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/079,186 Abandoned US20110253088A1 (en) 2010-04-15 2011-04-04 Structural unit for a gas exchange valve train of an internal combustion engine

Country Status (2)

Country Link
US (1) US20110253088A1 (de)
DE (1) DE102011006694A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130306009A1 (en) * 2012-05-16 2013-11-21 Schaeffler Technologies AG & Co. KG Valve train actuating device for an internal combustion engine
CN103670561A (zh) * 2012-09-04 2014-03-26 谢夫勒科技股份两合公司 杆状凸轮随动件
US20140366826A1 (en) * 2013-06-18 2014-12-18 GT Technologies Retention device for valve actuating mechanism

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2036936A (en) * 1932-04-04 1936-04-07 Halford Frank Bernard Valve gear for internal combustion engines
US2051313A (en) * 1933-08-14 1936-08-18 Boyle Motor Products Company Valve attachment
US2733619A (en) * 1956-02-07 smith
US5542315A (en) * 1994-06-21 1996-08-06 Cummins Engine Company, Inc. Elephant's foot adjusting screw assembly for internal combustion engine
US6047675A (en) * 1998-11-10 2000-04-11 General Motors Corporation Retainer clip and valve actuator subassembly
US6199526B1 (en) * 1999-06-28 2001-03-13 Michael G. Knickerbocker Retainer for rocker arm coupling in an internal combustion engine
US6273044B1 (en) * 1997-12-02 2001-08-14 Bayerische Motoren Werke Ag Valve actuating lever
US20010035144A1 (en) * 2000-04-12 2001-11-01 Burns John J. Load biasing retainer clip and valve actuator subassembly
US6397805B1 (en) * 1999-06-28 2002-06-04 Michael G. Knickerbocker Retainer for rocker arm coupling in an internal combustion engine
US7146950B2 (en) * 2004-07-14 2006-12-12 Ina-Schaeffler Kg Connecting element for inseparable retention of a lever-type cam follower
US7219639B2 (en) * 2002-10-24 2007-05-22 Ina-Schaeffler Kg Drag lever of a valve mechanism in an internal combustion engine
US20080041326A1 (en) * 2002-10-24 2008-02-21 Helmut Engelhardt Finger lever of a valve train of an internal combustion engine
US7350490B2 (en) * 2004-08-26 2008-04-01 Schaeffler Kg Connection element for the captive mounting of a lever-like cam follower
US20080196682A1 (en) * 2005-08-05 2008-08-21 Schaeffler Kg Connection Element For The Secure Fixing Of A Lever-Type Cam Follower
US20090145388A1 (en) * 2007-12-07 2009-06-11 Naoki Hiramatsu Valve gear and rocker ARM unit
US20100192889A1 (en) * 2009-01-30 2010-08-05 Radulescu Andrei D Rocker arm retention
US20110011361A1 (en) * 2008-06-18 2011-01-20 Koyo Bearings Usa Llc Coupling device
US7975664B2 (en) * 2005-08-27 2011-07-12 Schaeffler Kg Valve drive having a mechanical valve play position and method for the mounting thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617523C2 (de) 1996-05-02 2001-11-08 Schaeffler Waelzlager Ohg Sicherung für Betätigungshebel von Ventilsteuerungen für Brennkraftmaschinen

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733619A (en) * 1956-02-07 smith
US2036936A (en) * 1932-04-04 1936-04-07 Halford Frank Bernard Valve gear for internal combustion engines
US2051313A (en) * 1933-08-14 1936-08-18 Boyle Motor Products Company Valve attachment
US5542315A (en) * 1994-06-21 1996-08-06 Cummins Engine Company, Inc. Elephant's foot adjusting screw assembly for internal combustion engine
US6273044B1 (en) * 1997-12-02 2001-08-14 Bayerische Motoren Werke Ag Valve actuating lever
US6047675A (en) * 1998-11-10 2000-04-11 General Motors Corporation Retainer clip and valve actuator subassembly
US6199526B1 (en) * 1999-06-28 2001-03-13 Michael G. Knickerbocker Retainer for rocker arm coupling in an internal combustion engine
US6397805B1 (en) * 1999-06-28 2002-06-04 Michael G. Knickerbocker Retainer for rocker arm coupling in an internal combustion engine
US20010035144A1 (en) * 2000-04-12 2001-11-01 Burns John J. Load biasing retainer clip and valve actuator subassembly
US6543402B2 (en) * 2000-04-12 2003-04-08 Delphi Technologies, Inc. Load biasing retainer clip and valve actuator subassembly
US7350489B2 (en) * 2002-10-24 2008-04-01 Ina-Schaeffler Kg Finger lever of a valve train of an internal combustion engine
US7219639B2 (en) * 2002-10-24 2007-05-22 Ina-Schaeffler Kg Drag lever of a valve mechanism in an internal combustion engine
US20080041326A1 (en) * 2002-10-24 2008-02-21 Helmut Engelhardt Finger lever of a valve train of an internal combustion engine
US7146950B2 (en) * 2004-07-14 2006-12-12 Ina-Schaeffler Kg Connecting element for inseparable retention of a lever-type cam follower
US7350490B2 (en) * 2004-08-26 2008-04-01 Schaeffler Kg Connection element for the captive mounting of a lever-like cam follower
US20080196682A1 (en) * 2005-08-05 2008-08-21 Schaeffler Kg Connection Element For The Secure Fixing Of A Lever-Type Cam Follower
US7721695B2 (en) * 2005-08-05 2010-05-25 Schaeffler Kg Connection element for the secure fixing of a lever-type cam follower
US7975664B2 (en) * 2005-08-27 2011-07-12 Schaeffler Kg Valve drive having a mechanical valve play position and method for the mounting thereof
US20090145388A1 (en) * 2007-12-07 2009-06-11 Naoki Hiramatsu Valve gear and rocker ARM unit
US8025037B2 (en) * 2007-12-07 2011-09-27 Otics Corporation Valve gear and rocker ARM unit
US20110011361A1 (en) * 2008-06-18 2011-01-20 Koyo Bearings Usa Llc Coupling device
US20100192889A1 (en) * 2009-01-30 2010-08-05 Radulescu Andrei D Rocker arm retention
US8375909B2 (en) * 2009-01-30 2013-02-19 Eaton Corporation Rocker arm retention

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130306009A1 (en) * 2012-05-16 2013-11-21 Schaeffler Technologies AG & Co. KG Valve train actuating device for an internal combustion engine
CN103670561A (zh) * 2012-09-04 2014-03-26 谢夫勒科技股份两合公司 杆状凸轮随动件
US20140366826A1 (en) * 2013-06-18 2014-12-18 GT Technologies Retention device for valve actuating mechanism

Also Published As

Publication number Publication date
DE102011006694A1 (de) 2011-10-20

Similar Documents

Publication Publication Date Title
US8863716B2 (en) Tappet
US8627796B2 (en) Pivot foot for deactivating rocker arm
JP5137627B2 (ja) ロッカアームユニット及びロッカアームユニットの組立方法
US20110000451A1 (en) Coupling device
US20110011361A1 (en) Coupling device
US6138626A (en) Operating lever for a valve train of an internal combustion engine
US9512744B2 (en) Rocker arm clip retention feature
US8561585B2 (en) Rocker arm unit
US20110253088A1 (en) Structural unit for a gas exchange valve train of an internal combustion engine
US20120097123A1 (en) Finger lever
US20090056659A1 (en) Direct-acting type valve lifter for internal-combustion engines
US6758180B2 (en) Pinless roller finger follower
US9482120B2 (en) Retention device for valve actuating mechanism
EP2236776A1 (de) Joint de tige de soupape
US10428699B2 (en) Pivot bearing of a hydraulic clearance compensation element
US20140366826A1 (en) Retention device for valve actuating mechanism
US20170211429A1 (en) Lever for the valve actuation of an internal combustion engine
WO2008002746A2 (en) Coupling device
US7134410B2 (en) Detachable connection for coupling a gas exchange valve of an internal combustion engine to an actuator
CN110319270B (zh) 用于将操作杆与控制阀的控制滑块连接起来的装置
CN212389404U (zh) 气门摇臂
JP4133718B2 (ja) ロッカーアームフリクションプレート
JP3129977U (ja) ロッカーアーム
JP2018062861A (ja) シリンダヘッドの動弁機構
JP2016160821A (ja) シムの取付方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:EVANS, MATTHEW;KANDOLF, MICHAEL;REEL/FRAME:026069/0580

Effective date: 20110331

AS Assignment

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SCHAEFFLER TECHNOLOGIES GMBH & CO. KG;REEL/FRAME:027855/0525

Effective date: 20120119

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION