WO2006092249A1 - Fixierung eines lagerbolzens an rollenstösseln - Google Patents
Fixierung eines lagerbolzens an rollenstösseln Download PDFInfo
- Publication number
- WO2006092249A1 WO2006092249A1 PCT/EP2006/001743 EP2006001743W WO2006092249A1 WO 2006092249 A1 WO2006092249 A1 WO 2006092249A1 EP 2006001743 W EP2006001743 W EP 2006001743W WO 2006092249 A1 WO2006092249 A1 WO 2006092249A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing pin
- housing
- roller
- roller tappet
- fixation
- Prior art date
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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/146—Push-rods
-
- 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
Definitions
- the invention relates to a fixing of a bearing pin in a cylindrical housing of a roller tappet operated in the direction of a longitudinal axis, in particular for a push rod valve drive of an internal combustion engine.
- the bearing pin is mounted in bores in the housing, which extend in a direction perpendicular to the longitudinal axis transverse plane of the roller tappet, and by material deformation in consequence of end-side caulking of the bearing pin in the direction of the housing positively and / or non-positively connected to the housing.
- Verstemmre often has the shape of a continuous circumferential groove which is formed by the caulking die, which, for example, under the action of force around the axis of the bearing pin, in the end face.
- this material deformation can also from consist of numerous circular arc segments, which alternate with non-deformed, but relatively short sections.
- the bearing pin often serves as a bearing of a highly loaded cam roller of a roller tappet in internal combustion engines with a roller tappet valve train and bottom camshaft.
- the diameter of such a roller tappet usually depends directly on the diameter and width of the cam roller and is to keep as small as possible for reasons of moving valve train mass. This has the consequence that the cam roller is either included in a closed on the circumference, but locally very thin-walled roller pocket of the roller tappet or is disposed only between two axially extending webs of the housing for supporting the bearing pin.
- the invention is therefore an object of the invention to provide a fixation of a bearing pin on a roller tappet, which is made with the established assembly method of caulking, and increased security against loosening the fixation a lowest possible radial deformation of the bearing pin ensured receiving cylindrical housing.
- this object is achieved in that the material deformation is formed as one or more segments, of which at least one segment comprises a radial load zone of the bearing pin completely, wherein a running around the transverse plane portion of the bearing pin is free of material deformation.
- the radial load zone of the bearing pin is completely in a segment of material deformation, so that the security against loosening of the fixation is ensured by a uniform in the load zone interference fit between the bearing pin and the respective bore of the housing, characterized in that the material flow explained above Uneven pressure distribution with impermissibly high material stresses in the region of the load zone is effectively prevented.
- the radial load zone of the bearing pin comprehensive segment is formed circular arc. It is provided in a particularly preferred embodiment of the invention that the material deformation includes two symmetrical to the transverse plane segments. It is also proposed that these segments each enclose an angle of 120 ° in order to achieve the highest possible security against loosening of the fixation with at the same time a low deformation of the housing.
- roller tappet is designed to deactivate one or more gas exchange valves of the internal combustion engine switchable.
- roller tappets form deviations from the cylindricity of the housing of the roller tappet are to be kept within narrow limits, since this no longer in the deactivated state by the force of the gas exchange valve spring but by a considerably lower power, so-called lost-motion spring in the direction Camshaft of the internal combustion engine is reset.
- the concomitant increase in Verklemmne Trent the roller tappet in his leadership is at least compensated by the very low deformation of the housing.
- roller tappets in valve trains.
- roller tappets for example, as a cam follower in Fuel delivery devices are used to include in the scope of protection.
- fixation of the bearing pin according to the invention is shown by way of example with reference to a roller tappet for a roller tappet valve train of an internal combustion engine.
- the fixation of the bearing pin is symmetrical to a longitudinal axis of the roller tappet and, unless expressly stated otherwise, only described for one side of the bearing pin and provided with reference numbers. Show it:
- Figure 1 shows a longitudinal section through a housing of the roller tappet, wherein the bearing pin is shown in uncut top view on the end face and
- a cylindrical housing 1 of a subassembly of a roller tappet 2 for a push rod valve train of an internal combustion engine is shown.
- the housing 1 is actuated with an outer circumferential surface 3 in a hollow cylindrical guide of the internal combustion engine, not shown, in the direction of a longitudinal axis Z.
- the internal combustion engine is a roller bearing roller 4, which is arranged in a roller bag 5 of the housing 1.
- the bearing of the roller 4 via a bearing pin 6, which is received on both sides of a respective bore 7 between the outer circumferential surface 3 and the roller bag 5.
- the holes 7 each extend in a direction perpendicular to the longitudinal axis Z transverse plane XY of the roller tappet 2.
- FIG. 1 clearly shows a caulking pattern in the form of circular-arc-shaped segments 9 and 10.
- the bearing pin 6 is radially expanded due to the caulking in the areas of the segments 9 and 10, whereby in these areas a press fit between the bearing pin 6 and the bore 7 is made.
- Prerequisite for the material deformability of the end face 8 is an axial hardness profile, which starts from a comparatively soft and thus deformable material of the bearing pin 6 in the region of the end face 8 in a central, serving as a raceway 14 for the roller bearing roller 4 area with high hardness and wear resistance ,
- a portion 15 extending between the segments 9 and 10 as well as around the transverse plane XY is free from material deformation due to caulking. Consequently, neither the formation of the previously discussed press fit between the bearing pin 6 and the bore 7 nor the formation of this occurs in this portion 15 Therefore, a deformation of the cylindrical outer circumferential surface 3 of the housing 1 in the region of the roller pocket 5 can be minimized on the transverse plane XY.
- the interference fit produced only locally in the region of the segments 9 and 10 also acts form-fitting, to additionally support the security against loosening of the fixation as a result of a torque transmitted to the bearing pin 6.
- a load zone 16 is further shown, which acts on the bearing pin 6 due to a pendulum with respect to their force application force from the roller 4.
- the variable attack angle of the force follows a variable-angle point of contact between the roller 4 and the rotating cam.
- the prerequisite for a functionally reliable and permanent fixation of the bearing pin 6 on the housing 1 is therefore the most uniform radial expansion of the bearing pin 6 in the region of this load zone 16 in order to achieve the most homogeneous pressure distribution between the bearing pin 6 and bearing bore 7 in the region of the load zone 16.
- the load zone 16 is completely enclosed by the segment 9, which is remote from the cam, and is shown in FIG. 1 above the transverse plane XY.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002598748A CA2598748A1 (en) | 2005-02-28 | 2006-02-24 | Fixing a bearing bolt to roller tappets |
MX2007010110A MX2007010110A (es) | 2005-02-28 | 2006-02-24 | Sistema de fijacion de un bulon de cojinete en taques de rodillo. |
DE112006000338T DE112006000338B4 (de) | 2005-02-28 | 2006-02-24 | Fixierung eines Lagerbolzens an Rollenstösseln |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65704405P | 2005-02-28 | 2005-02-28 | |
US60/657,044 | 2005-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006092249A1 true WO2006092249A1 (de) | 2006-09-08 |
Family
ID=36593715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/001743 WO2006092249A1 (de) | 2005-02-28 | 2006-02-24 | Fixierung eines lagerbolzens an rollenstösseln |
Country Status (5)
Country | Link |
---|---|
US (1) | US7299777B2 (de) |
CA (1) | CA2598748A1 (de) |
DE (1) | DE112006000338B4 (de) |
MX (1) | MX2007010110A (de) |
WO (1) | WO2006092249A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7568461B1 (en) * | 2008-06-20 | 2009-08-04 | Gm Global Technology Operations, Inc. | Tappet roller end shape for improved lubrication and combination with fuel pump and engine |
EP2652273B1 (de) | 2010-12-13 | 2016-09-21 | Eaton Corporation | Pumpenbetätiger mit drehverhinderungsvorrichtung |
USD701243S1 (en) | 2011-12-13 | 2014-03-18 | Eaton Corporation | Pump actuator anti-rotation device |
EP2607636B1 (de) * | 2011-12-23 | 2015-10-14 | Aktiebolaget SKF | Mechanisches System, Einspritzpumpe mit solch einem mechanischen System und Verfahren zur Herstellung solch eines mechanischen Systems |
DE102017122090A1 (de) | 2017-09-25 | 2019-03-28 | Schaeffler Technologies AG & Co. KG | Übertragungsbauteil, insbesondere Hubübertragungsbauteil für einen Gaswechselventil- oder Kraftstoffpumpentrieb einer Brennkraftmaschine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4628874A (en) * | 1985-10-30 | 1986-12-16 | Eaton Corporation | Roller follower axle retention |
DE3933119A1 (de) * | 1989-10-04 | 1991-04-11 | Schaeffler Waelzlager Kg | Lagerbolzen fuer ein radialwaelzlager |
US5375323A (en) * | 1991-10-30 | 1994-12-27 | Nsk Ltd. | Method for securing shaft of cam follower device for valve action mechanism |
DE4337594A1 (de) * | 1993-11-04 | 1995-05-11 | Schaeffler Waelzlager Kg | Bolzenfixierung an Kipp- oder Schlepphebeln |
DE19612969A1 (de) * | 1996-04-01 | 1997-10-02 | Schaeffler Waelzlager Kg | Lagefixierung eines Bolzens an Kipp- oder Schlepphebeln |
DE19742778A1 (de) * | 1997-09-27 | 1999-04-01 | Schaeffler Waelzlager Ohg | Hebel für die Ventilsteuerung einer Brennkraftmaschine |
US6196175B1 (en) * | 1999-02-23 | 2001-03-06 | Eaton Corporation | Hydraulically actuated valve deactivating roller follower |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2743488B2 (ja) * | 1989-06-29 | 1998-04-22 | 日本精工株式会社 | エンジンの動弁機構用カムフォロア装置 |
DE4337952A1 (de) * | 1993-11-06 | 1995-05-11 | Schaeffler Waelzlager Kg | Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine |
DE19745051A1 (de) * | 1997-10-11 | 1999-04-15 | Schaeffler Waelzlager Ohg | Hebelartiger Nockenfolger |
US6382173B1 (en) * | 2000-05-02 | 2002-05-07 | Delphi Technologies, Inc. | Split body deactivation valve lifter |
-
2006
- 2006-02-23 US US11/360,259 patent/US7299777B2/en not_active Expired - Fee Related
- 2006-02-24 MX MX2007010110A patent/MX2007010110A/es active IP Right Grant
- 2006-02-24 CA CA002598748A patent/CA2598748A1/en not_active Abandoned
- 2006-02-24 WO PCT/EP2006/001743 patent/WO2006092249A1/de not_active Application Discontinuation
- 2006-02-24 DE DE112006000338T patent/DE112006000338B4/de not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4628874A (en) * | 1985-10-30 | 1986-12-16 | Eaton Corporation | Roller follower axle retention |
DE3933119A1 (de) * | 1989-10-04 | 1991-04-11 | Schaeffler Waelzlager Kg | Lagerbolzen fuer ein radialwaelzlager |
US5375323A (en) * | 1991-10-30 | 1994-12-27 | Nsk Ltd. | Method for securing shaft of cam follower device for valve action mechanism |
DE4337594A1 (de) * | 1993-11-04 | 1995-05-11 | Schaeffler Waelzlager Kg | Bolzenfixierung an Kipp- oder Schlepphebeln |
DE19612969A1 (de) * | 1996-04-01 | 1997-10-02 | Schaeffler Waelzlager Kg | Lagefixierung eines Bolzens an Kipp- oder Schlepphebeln |
DE19742778A1 (de) * | 1997-09-27 | 1999-04-01 | Schaeffler Waelzlager Ohg | Hebel für die Ventilsteuerung einer Brennkraftmaschine |
US6196175B1 (en) * | 1999-02-23 | 2001-03-06 | Eaton Corporation | Hydraulically actuated valve deactivating roller follower |
Also Published As
Publication number | Publication date |
---|---|
DE112006000338A5 (de) | 2007-12-27 |
DE112006000338B4 (de) | 2011-04-07 |
MX2007010110A (es) | 2007-11-15 |
CA2598748A1 (en) | 2006-09-08 |
US20060288974A1 (en) | 2006-12-28 |
US7299777B2 (en) | 2007-11-27 |
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