US3668945A - Roller tappet guard - Google Patents

Roller tappet guard Download PDF

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Publication number
US3668945A
US3668945A US19165A US3668945DA US3668945A US 3668945 A US3668945 A US 3668945A US 19165 A US19165 A US 19165A US 3668945D A US3668945D A US 3668945DA US 3668945 A US3668945 A US 3668945A
Authority
US
United States
Prior art keywords
tappets
planar face
pin
roller
adjacent
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.)
Expired - Lifetime
Application number
US19165A
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English (en)
Inventor
Eberhard Hofmann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3668945A publication Critical patent/US3668945A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F01L2307/00—Preventing the rotation of tappets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • This invention relates to guard means which, in multicylinder pump structures, particular multicylinder fuel injection pumps, prevents the roller tappets from turning about their axes during operation.
  • two immediately adjacent tappets are flattened on facing sides and are secured against rotation by means of a pin inserted into the pump housing and extending in a direction perpendicular to the tappet axis.
  • the rotatably or fixedly inserted pin serves merely to prevent the roller tappet from rotation.
  • the roller pin of the tappet has to be secured against axial displacement by additional means such as forced fitting, rivetting, the provision of cotter pins, or the like.
  • a pin inserted in the pump housing between two adjacent roller tappets; said pin is provided with two diametrically opposed parallel flattened portions associated with the flattened portions of the tappet, said flattened portions on the securing pin also serve for preventing an axial displacement of the roller pin carrier by each tappet.
  • FIG. 1 is a fragmentary axial sectional view of a multicylinder serial fuel injection pump incorporating a first embodiment of the invention
  • FIG. 2 is a sectional view along line II-II of FIG. 1;
  • FIG. 3 is a perspective'view of a securing pin incorporated in the structure shown in FIGS. 1 and 2;
  • FIG. 4 is a fragmentary axial sectional view of a multicylinder serial fuel injection pump incorporating a second embodiment of the invention.
  • FIG. 5 is a section view along line V-V of FIG. 4.
  • FIG. 6 is a perspective view of a securing pin incorporated in the structure shown in FIGS. 4 and 5.
  • housing 1, 1' of the fuel injection pump there is rotatably held a cam shaft 2, 2, the cams 3, 3' of which are engaged by at least two adjacent roller tappets 6, 6' provided with flattened portions 4, 4 and guided in housing bores 5, 5'.
  • a roller 8, 8' To each tappet 6, 6' there is secured a roller 8, 8' by means of a roller pin 7, 7'.
  • the rollers 8, 8' are urged into contact with the work face of cam 3, 3' by means of a tappet spring 9, 9' supported in the housing 1, 1
  • the tappet spring 9, 9' exerts its force on the tappet 6, 6'
  • the spring seat disc l0, 10 is provided with a central opening through which extends a terminal portion of piston l2, l2. Said terminal portion carries an integral collar 11, 11 which is held captive with a small clearance between spring seat disc 10, 10' and the base l3, 13 of the respective cavity 6a, 6a.
  • a securing pin 14, 14 disposed perpendicularly to both the axes of the two adjacent tappets 6, 6 and those of roller pins 7, 7.
  • Each securing pin 14,14 has two cylindrical terminal portions 14a, 14a, and 14b, 14b and a mid-portion which has two diametrically opposed flattened parts 15, 15', extending normal to the axis of each roller pin.
  • planar faces 15, 15' are at least of such an area that the ends l6, 16 of the roller pins 7, 7' do not slide beyond the outline of said area during the strokes of the tappets 6, 6'.
  • the peripheral outline of a roller pin is orthogonally projected onto the immediately adjacent planar face of the securing pin at any momentary position of the associated tappet during its reciprocation, at least one part of such projection intersects the last-named planar face of the securing pin. This arrangement may be well observed in FIG. 1 in which the two tappets are shown in opposite extreme positions. Or, it may also be said that as it may be well observed in FIG.
  • each planar face of the securing pin lies in a plane that is parallel to the direction of reciprocation of the tappets and the dimension C of each planar face taken in the direction of reciprocation is at least as large as the amplitude B (indicated in FIG. 1 as the distance between the axes A of two adjacent roller pins depicted, as mentioned earlier, in the two opposite extreme positions).
  • each planar face of the securing pin is so arranged with respect to the adjacent reciprocating roller pin that the axis A of the latter, in both extreme positions of the roller pin and in any positions therebetween, passes through a point that is located on the adjacent planar face of the securing pin.
  • the other ends l7, 17 of roller pins 7, 7 glide along the wall of the housing bore 5, 5'. In this manner, the roller pins 7, 7' are prevented from displacement in either axial direction.
  • the frontal faces 16, 16' and 17, 17' are rounded in order to improve their gliding properties.
  • the securing pin 14, 14' has at the frontal face of the cylindrical terminal portion 14b, 14b a slot 22, 22', the edges of which extend parallel to the faces 15, 15', thus permitting an accurate positioning during the force-fitting thereof into the pump housing 1, l
  • the roller tappets 6' In the second embodiment for securing the tappets in a multicylinder fuel injection pump (FIGS. 4, 5), preferably of the V-configuration, the roller tappets 6' have lower terminal portions 18 of reduced diameter to prevent an engagement of the roller tappets 6' of one pump series with a cam 3" of the cam shaft 2 associated with the other pump series.
  • the roller pins 7' have a notched or cut-out lower portion 7a.
  • roller pins 7' In order to prevent rotation of the roller pins 7' during operation, they are provided with integral stubs 19 which glide in grooves 20 provided in the securing pin 14' and extend parallel with the tappet axis.
  • the securing pin 14' has in its mid-portion a planar face 21 confronting the cam 3" to permit a free passage thereof.
  • FIGS. 4-6 The embodiment described in connection with FIGS. 4-6 is particularly advantageous since it permits a substantial reduction of the overall dimensions of a V-type pump.
  • a guard means for tappets operating in a multicylinder fuel injection pump said tappets are of the reciprocating type that carry a roller mounted by a roller pin
  • said guard means is of the known type that includes a securing pin fixedly held in the housing of said multicylinder device between two adjacent tappets, said securing pin cooperates with flattened areas of said tappets to prevent rotation of the latter, the improvement comprising, two diametrically opposed planar face portions provided in said securing pin, each said planar face portion extending parallel to and cooperating with a flattened area of said two adjacent tappets, said planar face portions of said securing pin being disposed immediately adjacent a terminus of each roller pin of said two adjacent tappets, each planar face portion lying in a plane disposed parallel with the direction of reciprocation of said tappets, the dimension of each planar face portion measured parallel with said direction of reciprocation being at least as large as the amplitude of said reciprocation, each planar face portion being so disposed with respect to the adjacent reciprocating
  • a guard means for tappets operating in a multicylinder device, particularly a fuel injection pump said tappets are of the reciprocating type that carry a roller mounted by a roller pin
  • said guard means is of the known type that includes a securing pin fixedly held in the housing of said multicylinder device between two adjacent tappets, said securing pin cooperates with flattened face portions of said tappets to prevent rotation of the latter, the improvement comprising, two diametrically opposed planar face portions provided in said securing pin, each said planar face portion extending parallel to and cooperating with a flattened face portion of said two adjacent tappets, said planar face portions of said securing pin being disposed immediately adjacent a tenninus of each roller pin of said two adjacent tappets, each said roller pin remaining within the outline of said planar face portions at all times during the reciprocation of said tappets and a groove provided in each planar face portion of said securing pin, each groove extending parallel to the path of reciprocation of said tappets, each

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Reciprocating Pumps (AREA)
US19165A 1969-03-18 1970-03-13 Roller tappet guard Expired - Lifetime US3668945A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691913519 DE1913519A1 (de) 1969-03-18 1969-03-18 Vorrichtung zur Sicherling der Rollenscoessel von Mchfzylinder-Einspritzpumpen gegen Drehen

Publications (1)

Publication Number Publication Date
US3668945A true US3668945A (en) 1972-06-13

Family

ID=5728397

Family Applications (1)

Application Number Title Priority Date Filing Date
US19165A Expired - Lifetime US3668945A (en) 1969-03-18 1970-03-13 Roller tappet guard

Country Status (8)

Country Link
US (1) US3668945A (de)
AT (1) AT304173B (de)
DE (1) DE1913519A1 (de)
ES (1) ES185300Y (de)
FR (1) FR2039026A5 (de)
GB (1) GB1300258A (de)
RO (1) RO57108A (de)
YU (1) YU31898B (de)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779217A (en) * 1971-03-10 1973-12-18 K Kuhn Device for interlinking the upper spring-caps of two mutually adjacent internal-combustion-engine valves
US3998190A (en) * 1975-06-13 1976-12-21 Caterpillar Tractor Co. Roller follower with anti-rotation retainer
US4207775A (en) * 1977-06-17 1980-06-17 Lucas Industries Limited Fuel pumping apparatus
US4326484A (en) * 1979-10-26 1982-04-27 Cummins Engine Company, Inc. Floating tappet guide plate
US4339234A (en) * 1979-08-03 1982-07-13 Lucas Industries Limited Drive cam and follower for a liquid fuel injection pumping apparatus
US4628874A (en) * 1985-10-30 1986-12-16 Eaton Corporation Roller follower axle retention
US5022356A (en) * 1990-10-05 1991-06-11 Gear Company Of America, Inc. Roller valve lifter with anti-rotation member
US5088455A (en) * 1991-08-12 1992-02-18 Mid-American Products, Inc. Roller valve lifter anti-rotation guide
US5307769A (en) * 1993-06-07 1994-05-03 General Motors Corporation Low mass roller valve lifter assembly
US20030070636A1 (en) * 2001-06-25 2003-04-17 Ina-Schaeffler Kg Internal combustion engine with an anti-rotation guide for valve lifters
US20040074462A1 (en) * 2002-10-18 2004-04-22 Dhruva Mandal Lash adjuster body
US20040154571A1 (en) * 2002-10-18 2004-08-12 Dhruva Mandal Roller Follower assembly
US6871622B2 (en) 2002-10-18 2005-03-29 Maclean-Fogg Company Leakdown plunger
US20060048755A1 (en) * 2003-03-11 2006-03-09 Toshio Kamiyama Diesel engine
US20060110273A1 (en) * 2004-11-23 2006-05-25 Shaull Anthony A Fuel pump with a guided tappet assembly and methods for guiding and assembly
US7128034B2 (en) 2002-10-18 2006-10-31 Maclean-Fogg Company Valve lifter body
US7273026B2 (en) 2002-10-18 2007-09-25 Maclean-Fogg Company Roller follower body
US20090071446A1 (en) * 2005-06-08 2009-03-19 Sakae Sato Fuel supply pump and tappet structure body
WO2010048968A1 (en) * 2008-10-27 2010-05-06 Ab Skf Antirotation device
US8171906B2 (en) 2008-10-21 2012-05-08 Apq Development, Llc Valve lifter guide and method of using same
US20130195692A1 (en) * 2012-01-31 2013-08-01 Denso Corporation Supply pump
FR2998614A1 (fr) * 2012-11-29 2014-05-30 Skf Ab Suiveur de came avec dispositif anti-rotation
US20140170005A1 (en) * 2012-12-14 2014-06-19 Koganei Corporation Liquid supply apparatus
US8826874B2 (en) 2010-12-22 2014-09-09 Caterpillar Inc. Anti-rotation roller valve lifter
EP2853697A1 (de) * 2013-09-27 2015-04-01 Aktiebolaget SKF Mechanisches System, Einspritzpumpe und Ventilaktor mit einem solchen mechanischen System und Herstellungsverfahren
WO2016145133A1 (en) * 2015-03-10 2016-09-15 Cummins Inc. Guided tappet assembly method and apparatus
US20180135578A1 (en) * 2015-04-28 2018-05-17 Cummins Inc. Pinless tappet in a common rail high pressure fuel pump
US10247052B2 (en) 2017-07-31 2019-04-02 Caterpillar Inc. Guide assembly for valve lifters of engines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3725458A1 (de) * 1987-07-31 1989-02-09 Bayerische Motoren Werke Ag Steuervorrichtung fuer gaswechsel-ventile einer brennkraftmaschine
GB2617853A (en) * 2022-04-21 2023-10-25 Delphi Tech Ip Ltd Drive assembly for a fuel pump with roller tappet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1061700A (en) * 1912-02-21 1913-05-13 Gen Electric Means for transmitting motion.
US2935878A (en) * 1953-05-12 1960-05-10 Daimler Benz Ag Anti-rotation plunger arrangement for injection pumps
US3139076A (en) * 1961-08-21 1964-06-30 Victor M Flaherty Non-rotating tappet arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1061700A (en) * 1912-02-21 1913-05-13 Gen Electric Means for transmitting motion.
US2935878A (en) * 1953-05-12 1960-05-10 Daimler Benz Ag Anti-rotation plunger arrangement for injection pumps
US3139076A (en) * 1961-08-21 1964-06-30 Victor M Flaherty Non-rotating tappet arrangement

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779217A (en) * 1971-03-10 1973-12-18 K Kuhn Device for interlinking the upper spring-caps of two mutually adjacent internal-combustion-engine valves
US3998190A (en) * 1975-06-13 1976-12-21 Caterpillar Tractor Co. Roller follower with anti-rotation retainer
US4207775A (en) * 1977-06-17 1980-06-17 Lucas Industries Limited Fuel pumping apparatus
US4339234A (en) * 1979-08-03 1982-07-13 Lucas Industries Limited Drive cam and follower for a liquid fuel injection pumping apparatus
US4326484A (en) * 1979-10-26 1982-04-27 Cummins Engine Company, Inc. Floating tappet guide plate
US4628874A (en) * 1985-10-30 1986-12-16 Eaton Corporation Roller follower axle retention
US5022356A (en) * 1990-10-05 1991-06-11 Gear Company Of America, Inc. Roller valve lifter with anti-rotation member
US5088455A (en) * 1991-08-12 1992-02-18 Mid-American Products, Inc. Roller valve lifter anti-rotation guide
US5307769A (en) * 1993-06-07 1994-05-03 General Motors Corporation Low mass roller valve lifter assembly
US6745737B2 (en) * 2001-06-25 2004-06-08 Ina-Schaeffler-Kg Internal combustion engine with an anti-rotation guide for valve lifters
US20030070636A1 (en) * 2001-06-25 2003-04-17 Ina-Schaeffler Kg Internal combustion engine with an anti-rotation guide for valve lifters
US7284520B2 (en) 2002-10-18 2007-10-23 Maclean-Fogg Company Valve lifter body and method of manufacture
US20040074462A1 (en) * 2002-10-18 2004-04-22 Dhruva Mandal Lash adjuster body
US6871622B2 (en) 2002-10-18 2005-03-29 Maclean-Fogg Company Leakdown plunger
US7028654B2 (en) 2002-10-18 2006-04-18 The Maclean-Fogg Company Metering socket
US20040154571A1 (en) * 2002-10-18 2004-08-12 Dhruva Mandal Roller Follower assembly
US7128034B2 (en) 2002-10-18 2006-10-31 Maclean-Fogg Company Valve lifter body
US7191745B2 (en) 2002-10-18 2007-03-20 Maclean-Fogg Company Valve operating assembly
US7273026B2 (en) 2002-10-18 2007-09-25 Maclean-Fogg Company Roller follower body
US7281329B2 (en) 2002-10-18 2007-10-16 Maclean-Fogg Company Method for fabricating a roller follower assembly
US20060048755A1 (en) * 2003-03-11 2006-03-09 Toshio Kamiyama Diesel engine
US7156079B2 (en) * 2003-03-11 2007-01-02 Yanmar Co., Ltd. Diesel engine
CN101208511B (zh) * 2004-11-23 2010-09-01 卡明斯公司 具有被引导的挺杆组件的燃料泵以及引导和装配的方法
WO2006057979A3 (en) * 2004-11-23 2007-12-21 Cummins Inc Fuel pump with a guided tappet assembly and methods for guiding and assembly
US7311087B2 (en) * 2004-11-23 2007-12-25 Cummins Inc. Fuel pump with a guided tappet assembly and methods for guiding and assembly
US20060110273A1 (en) * 2004-11-23 2006-05-25 Shaull Anthony A Fuel pump with a guided tappet assembly and methods for guiding and assembly
US20090071446A1 (en) * 2005-06-08 2009-03-19 Sakae Sato Fuel supply pump and tappet structure body
US7661413B2 (en) * 2005-06-08 2010-02-16 Bosch Corporation Fuel supply pump and tappet structure body
US8171906B2 (en) 2008-10-21 2012-05-08 Apq Development, Llc Valve lifter guide and method of using same
WO2010048968A1 (en) * 2008-10-27 2010-05-06 Ab Skf Antirotation device
CN102203416A (zh) * 2008-10-27 2011-09-28 Skf公司 抗旋转装置
US8826874B2 (en) 2010-12-22 2014-09-09 Caterpillar Inc. Anti-rotation roller valve lifter
US20130195692A1 (en) * 2012-01-31 2013-08-01 Denso Corporation Supply pump
US9297376B2 (en) * 2012-01-31 2016-03-29 Denso Corporation Supply pump
US20150337939A1 (en) * 2012-11-29 2015-11-26 Aktiebolaget Ske Cam follower with anti-rotation device
CN104822908A (zh) * 2012-11-29 2015-08-05 Skf公司 具有抗旋转装置的凸轮随动件
FR2998614A1 (fr) * 2012-11-29 2014-05-30 Skf Ab Suiveur de came avec dispositif anti-rotation
WO2014083174A1 (fr) * 2012-11-29 2014-06-05 Aktiebolaget Skf Suiveur de came avec dispositif anti-rotation
CN104822908B (zh) * 2012-11-29 2018-05-08 Skf公司 具有抗旋转装置的凸轮随动件
US10260614B2 (en) * 2012-11-29 2019-04-16 Aktiebolaget Skf Cam follower with anti-rotation device
US20140170005A1 (en) * 2012-12-14 2014-06-19 Koganei Corporation Liquid supply apparatus
US9506458B2 (en) * 2012-12-14 2016-11-29 Koganei Corporation Liquid supply apparatus
EP2853697A1 (de) * 2013-09-27 2015-04-01 Aktiebolaget SKF Mechanisches System, Einspritzpumpe und Ventilaktor mit einem solchen mechanischen System und Herstellungsverfahren
WO2016145133A1 (en) * 2015-03-10 2016-09-15 Cummins Inc. Guided tappet assembly method and apparatus
US20180135578A1 (en) * 2015-04-28 2018-05-17 Cummins Inc. Pinless tappet in a common rail high pressure fuel pump
US10487785B2 (en) * 2015-04-28 2019-11-26 Cummins Inc. Pinless tappet in a common rail high pressure fuel pump
US10247052B2 (en) 2017-07-31 2019-04-02 Caterpillar Inc. Guide assembly for valve lifters of engines

Also Published As

Publication number Publication date
GB1300258A (en) 1972-12-20
YU31898B (en) 1973-12-31
YU68470A (en) 1973-06-30
ES185300Y (es) 1974-06-16
FR2039026A5 (de) 1971-01-08
AT304173B (de) 1972-12-27
DE1913519A1 (de) 1970-09-24
RO57108A (de) 1974-12-15
ES185300U (es) 1973-10-01

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