US3673651A - Crankshaft balance weights and method of assembly - Google Patents

Crankshaft balance weights and method of assembly Download PDF

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Publication number
US3673651A
US3673651A US26922A US3673651DA US3673651A US 3673651 A US3673651 A US 3673651A US 26922 A US26922 A US 26922A US 3673651D A US3673651D A US 3673651DA US 3673651 A US3673651 A US 3673651A
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Prior art keywords
balance weights
crankshaft
portions
primary
web
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Expired - Lifetime
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US26922A
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English (en)
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William F Stewart
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Perkins Ltd
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Perkins Engines Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/20—Shape of crankshafts or eccentric-shafts having regard to balancing
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
    • F16F15/283—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same for engine crankshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/005—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/901—Balancing method
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49286—Crankshaft making
    • 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
    • Y10T74/2173—Cranks and wrist pins
    • Y10T74/2183—Counterbalanced

Definitions

  • the present invention relates to crankshafts for engines and to a method of making erankshafts.
  • Balance weights may be formed as an integral part of the crankshaft or separate weights may be attached after forming the crankshaft.
  • Crankshafts for production engines for automotive and other applications usually undergo tests at rotational speeds well in excess of those they would encounter during normal running of the engine. Under the test conditions the balance weights must remain firmly attached to the crankshaft.
  • balance weights which can be attached to the crankshaft.
  • a major disadvantage of this approach is retention of the balance weights at high speed. Solutions to the retention problem have hitherto been costly in terms of time, machining accuracy, and the special standard of fixings necessary. Also a high standard of inspection is required during manufacture and final assembly.
  • Balance weights may be attached by welding, but hitherto proposed welding methods have the disadvantage that heating and coolingof the crankshaft causes distortion.
  • a method of attaching balance weights to web portions of a crankshaft comprising the steps of providing, on the balance weights and on the web portions respectively, mutually engageable surfaces each having at least one rectilinear dimension arranged so as to permit electron-beam welding throughout the locus of the said dimension in a direction which is transverse to the general plane of the associated web portion, and positioning and electron-beam welding the balance weights successively with the respective surfaces in mutual engagement.
  • a method of making a crankshaft comprising the steps of forming a crankshaft body with journal portions, crankpin portions and web portions, completing machining of the body, providing primary balance weights and attaching these to at least some of the web portions, balancing the body with the primary balance weights attached, subjecting parts of the body to surface hardening treatment, providing secondary balance weights or trimmer plates of predetermined weight and dimensions, and attaching the secondary balance weights or trimmer plates to the primary balance weights.
  • crankshaft body having web portions adapted for attachment thereto of balance weights by means of electronbeam welding, each such web portion having a surface thereon with a rectilinear dimension the locus of which is transverse to the general plane of the web portion for engagement with a complementary surface on a balance weight, such surfaces being disposed in relation to one another so as to permit access to each surface of an electron beam during successive welding operations.
  • crankshaft having web portions with primary balance weights attached thereto by means of electron-beam welding, the thickness of the primary balance weights being such as to permit radial access to adjacent journals or crankpins for the purpose of subjecting the journals and/or crankpins to surface hardening treatment and/or to superfinishing.
  • FIG. I is an elevation of one half of a crankshaft for a V-8 engine seen in the direction of arrow I in FIG. 2;
  • FIG. 2 is a plan of the crankshaft seen in the direction of arrow II in FIG. 1;
  • FIG. 3 is an end view of the crankshaft up to the mid-plane A-A as seen in the direction of arrow III in FIG. 2;
  • FIG. 4 is an elevation of the crankshaft as seen in the direction of arrow IV in FIG. 3 prior to attachment of the balance weights which are shown in section;
  • FIG. 5 is an enlarged partial section of line V-V in FIG. 3 on the crankshaft local to a balance weight
  • FIG. 6 is a similar view to FIG. 4 on a second embodiment
  • FIGS. 7 and 8 are similar views to FIGS. 3 and 4 of a third embodiment
  • FIG. 9 is a view on section [XIX in FIG. 10 of a balance weight with a trimmer plate attached.
  • FIG. 10 is a section on line XX in FIG. 9 showing how the trimmer plate is attached by one method
  • FIG. 11 is a similar section to FIG. 10 showing how the trimmer plate is attached by a second method.
  • FIGS. 1 to 6 there is shown one half of the length of a crankshaft for a V-8 engine.
  • the other half is asymmetrical to the half shown in all fundamental respects and for the sake of convenience is not illustrated.
  • a crankshaft 1 has journals constituted by from, intermediate and mid main bearings 2, 3 and 4 respectively, and crank pins 5 and 6 situated at displacement from each other.
  • Webs 7, 8 and 9 flanking the front and intermediate main bearings 2 and 3 carry primary balance weights 10, 11 and 12.
  • a web 13 flanking the mid main bearing 4 has no balance weight. The web 7 and the associated balance weight 10 are heavier than the others.
  • flat surfaces 17, I8 and 19 on webs 7, 8, 9 and flat surfaces 14, I5, 16 on balance weights 10, 11 and 12 are electron beam welded to each other across the contiguous flat surfaces respectively.
  • Each of the balance weights is carefully machined especially in relation to the distances between holes 10a and 10b and the placing of these holes in relation to the surface 14.
  • the distance between the holes 10a and 10b and the sizes of these holes is especially important because they have to match closely with corresponding holes in secondary balance weights or trimmer plates described later herein.
  • the reference numerals 10a and 10b are used in relation to balance weights 10 and it is to be understood that other balance weights have similar holes formed with equal care and accuracy of position.
  • Reference numeral 20 denotes the electron discharge head of electron beam welding apparatus.
  • the surfaces 14, 15 and 16 are stepped outwards from the crankshaft axis; likewise, the surfaces l7, l8 and 19.
  • the discharge head 20 is placed in the plane of surface 19 and aimed at it. Assembly proceeds as follows.
  • Balance weight 12 is placed in the desired position with its surface 16 abutting surface 19 and the welding apparatus is energized to direct a stream of electrons at the interface 16/19. This causes local melting and fusion of the metals of the crankshaft and balance weight. The electron beam is caused to traverse the interface so that the whole of the abutting surfaces become united.
  • the discharge head 20 is next aligned with abutting surfaces 18 and I5 and the electron beam welding apparatus is energized and traversed to unite balance weight 11 with web 8. Finally, balance weight is united with web 7 by the same procedure. The same attention is then given to the corresponding three balance weights (not shown) at the other end of the crankshaft.
  • Surface 18 is stepped inwards from surface 19 so that the former does not interfere with the beam to the latter. The beam must be placed on line-of-sight with the surface to be welded. Likewise, surface 17 must not mask the beam from surface 18.
  • the two abutting surfaces overhang each other by reason that the boundaries of the two surfaces are not the same shape or size. If this is not so then an undercut 23, as shown in FIG. 5, can be provided on the balance weight to ensure an overhang.
  • the overhang ensures that any welding flash produced remains in a recess and no time need be spent in fettling it.
  • FIG. 6 shows how the surfaces 170, 18a, 19a and 14a, 15a and 16a can be complementarily angled to allow the discharge head to be positioned so that the electron beam issuing therefrom will clear the other webs or other obstructions.
  • the relative traversing of the electron beam and the crankshaft is along a straight path which is a chord of a circle with the axis of the crankshaft as center.
  • the surfaces 17b, 18b, 19b and 14b, 15b, 16b are cylindrical surfaces. They are stepped slightly to allow unobstructed access of the electron beam as in the case of FIG. 4. If the cylindrical surfaces are angles as in FIG. 6 they necessarily become conical surfaces and the electron discharge head has to be moved accordingly.
  • FIGS. 9, 10 and 11 illustrate the secondary balance weights or trimmer plates 24 which are to be fitted to the balance weights to complete the crankshaft, shown in FIG. 1. These preferably have the same shape as the balance weights as seen in FIG. 3.
  • FIGS. 10 and 11 Two methods of attachment of the trimmer plates are illustrated in FIGS. 10 and 11. Both these methods provide that there will be a minimum of local distortion adjacent to the fastening means thereby minimizing the imposition of undesirable stresses on the fastening means.
  • FIG. 10 there is shown a relatively thin trimmer plate 24 which has a pair of holes 25 formed in it, at the same spacing within close tolerances as the holes 10a and 10b referred to previously.
  • a stepped insert 26 is fitted closely within hole 25 and is electron beam welded to the trimmer plate 24 around the periphery of the hole 25.
  • the insert 26 is threaded internally.
  • the hole 10a is a stepped hole the larger diameter portion 27 being such as to receive the socket head 28 of a set screw 29, the shank 30 of which passes through the smaller diameter portion 31 of hole 10a.
  • a recess 32 is provided to receive the insert 26 in closely fitting engagement in the manner of a dowel.
  • the insert thus constitutes an internally threaded dowel and two of them locate the trimmer plate 24 against lateral movement relative to the balance weight 10.
  • the electron beam welding of the insert 26 to the trimmer plate permits accuracy of alignment of the dowel to be maintained during the welding process, an advantage that cannot be guaranteed without expensive jigging with other forms of welding. Furthermore, the strength of the insert 26 in shear is relatively unchanged before and after welding, it being understood that the insert is a very highly stressed part.
  • FIG. 11 a relatively thicker trimmer plate 34 is shown attached to the balance weight 10.
  • the balance weight is drilled in exactly the same manner as in FIG. 10 and the same reference numerals identify the same parts.
  • the insert 36 has a portion 37 which fits closely in the recess 32 and in a hole 38 in the trimmer plate 34.
  • a recess 39 in the outer side of the trimmer plate 34 receives a flange 40 on the insert 36 which serves, with the set screw 29, to prevent separation of the trimmer plate from the balance weight 10.
  • the insert 36 in this case functions as a loose dowel.
  • dowel holes on the balance weights and trimmer plates can be formed prior to any welding and can be relied upon to be useable as dowel locations after welding.
  • the method of making a crankshaft calls for the first step of machining the forging.
  • the main bearings 2, 3, 4, etc. crankpin bearings 5, 6 etc. front and rear ends 46 etc., lightening holes 48, oilways 49 and the surface 17, 18, 19 etc. are all completed to their proper dimensions and finish so that the crankshaft does not have to return to any machine tool for subsequent metal removal.
  • the next step is to electron beam weld and balance weights in position. This does not involve widespread dispersal of heat in the crankshaft so that there is no distortion such as would cause a requirement for remachining.
  • the crankshaft is balanced.
  • This step involves the addition of temporary weights to the crankpins.
  • the temporary weights in this case compensate for part of the total out of balance.
  • the actual balancing is carried out in known manner by removing mass from appropriate parts of the crankshaft.
  • crankshaft After balancing, the crankshaft is in a state where the securing of a set of trimmer plates will place it in a desired state of balance for the engine. Before securing the trimmer plates however, the crankshaft bearing surfaces undergo heat treatment to harden them. Depending upon the type of heat treatment, the bearing surfaces may subsequently be cleaned and polished to remove any surface deposits on the bearing. Then the trimmer plates are fitted and the crankshaft is complete, ready for fitting to an engine.
  • crankshafts of such engines are of the same basic dimensions and are in all respects, except balance, identical.
  • the present invention enables a basic crankshaft with balance weights to be made and balanced so that all that is required subsequently is to fit the set of trimmer plates appropriate to the reciprocating mass of the engine in which the crankshaft is to be fitted.
  • Each trimmer plate is, of course, carefully weighed and tested as to the position of its center of gravity to ensure compatibility with its fellows in the set and with the crankshaft.
  • the present invention enables complete machining of the crankshaft at a time when no regard need be paid to the problem of balance weights which overhang the crankpins or main bearings; furthermore, no remachining is necessary following the welding of the balance weights.
  • the screwsecured weights are attached with the screw axes parallel with the crank axis and the screws are relieved of the shear loads which are carried by the dowels. This makes for greater safety than the use of radial screws which have been used hitherto.
  • the weight to be retained by screw means is a fraction of the total balance weight instead of the whole of it as has been proposed hitherto.
  • balance weights is particularly acute with a V-8 crankshaft in which each crank pin carries two connecting rods and the invention has been described with reference to such a crankshaft. It will be appreciated that the invention can be used to solve similar problems in connection with engines of different configuration.
  • a method of making a crankshaft comprising the steps of forming journal, crankpin and web portions providing balance weights, providing on the balance weights and on the web portions respectfully, mutually engageablc surfaces each having at least one rectilinear dimension arranged so as to permit local welding by beamed means aligned with the locus of the said dimension in a direction which is generally transverse to the general plane of the associated web portion, and positioning said locus and beamed means so as to space it away from any parts of the crankshaft other than the web portion to minimize interference with the beamed means to enable successive welding of each one of the balance weights while their respective surfaces are in mutual engagement.
  • a method of making a crankshaft comprising the steps of forming a crankshaft body with journal portions, crankpin portions and web portions, machining the journal portions, providing primary balance weights and welding these to at least some of the web-portions, balancing the body with the primary balance weights attached, subjecting parts of the body to surface hardening treatment, providing trimmer plates of predetermined weight and dimensions, and attaching the trimmer plates to the primary balance weights.
  • each primary balance weight is attached to its respective web portion by means of electron-beam welding, the direction of the electronbeam being transverse to the general plane of the web portion.
  • the method according to claim 3 including the steps of providing, on the primary and secondary balance weights respectively, complementary accommodation for means for attaching the trimmer plates to the primary balance weights.
  • trimmer plates are attached to the primary balance weights subsequent to subjecting parts of the body to surface hardening treatment.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
US26922A 1969-04-25 1970-04-09 Crankshaft balance weights and method of assembly Expired - Lifetime US3673651A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2114769 1969-04-25
NL7015572A NL7015572A (de) 1969-04-25 1970-10-23

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US3673651A true US3673651A (en) 1972-07-04

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US (1) US3673651A (de)
DE (1) DE2018273A1 (de)
FR (1) FR2040224A1 (de)
GB (1) GB1313491A (de)
NL (1) NL7015572A (de)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777340A (en) * 1971-06-15 1973-12-11 Renault Device for pre-balancing unbalanced masses on crankshafts
US3987859A (en) * 1973-10-24 1976-10-26 Dresser Industries, Inc. Unitized rotary rock bit
US4356741A (en) * 1977-02-12 1982-11-02 Daimler-Benz Aktiengesellschaft Cast crankshafts
US4445399A (en) * 1978-12-11 1984-05-01 Honda Giken Kogyo Kabushiki Kaisha Process for balancing a crankshaft
US4677948A (en) * 1986-05-29 1987-07-07 Chrysler Motors Corporation Lubricating system for an engine balancing device
US4703725A (en) * 1986-05-29 1987-11-03 Chrysler Motors Corporation Mounting of an engine balancing device
US4703724A (en) * 1986-05-29 1987-11-03 Chrysler Motors Corporation Engine balancing device with a lubricant side discharge
US4730512A (en) * 1984-10-23 1988-03-15 Toyota Jidosha Kabushiki Kaisha Engine crankshaft structure
US4768397A (en) * 1982-06-28 1988-09-06 Tecumseh Products Compny Lubrication scheme for pressure lubricated crankshafts with counterweight holes for crankshaft balance
US5131143A (en) * 1990-07-13 1992-07-21 Gfm Gesellschaft Fur Fertigungstechnik Und Maschinenbau Aktiengesellschaft Method of centering and thus balancing workpieces to be machined only in part
US5170547A (en) * 1988-06-28 1992-12-15 Valmet Paper Machinery Inc. Method and device for balancing a roll
US5463900A (en) * 1993-04-02 1995-11-07 Fichtel & Sachs Ag Balancing process and balanced component after this process
US5633093A (en) * 1991-06-25 1997-05-27 Dana Corporation Counterweight attachment technique
US5836218A (en) * 1995-12-20 1998-11-17 Hyundai Motor Company, Ltd. Crankshaft for cooling pistons
US6135727A (en) * 1999-02-16 2000-10-24 Tecumseh Products Company Detachably affixed counterweight and method of assembly
US6477916B2 (en) * 1999-08-18 2002-11-12 General Electric Company Methods of installing a balance weight for a rotary component in turbomachinery
US20090308343A1 (en) * 2006-04-18 2009-12-17 Ewald Herzog Balancing Shaft
US20100132652A1 (en) * 2007-06-14 2010-06-03 Ewald Herzog Balancing shaft
US20100192894A1 (en) * 2007-06-14 2010-08-05 Ewald Herzog Balancing shaft
US20140102248A1 (en) * 2012-10-17 2014-04-17 Ford Global Technologies, Llc Balancing a pendulum-absorber crankshaft
US8939123B2 (en) 2009-07-30 2015-01-27 Herzog Intertec Gmbh Countershaft
US10352352B2 (en) * 2017-10-05 2019-07-16 GM Global Technology Operations LLC Machining oval cores in crankshafts
CN110953239A (zh) * 2019-12-25 2020-04-03 潍柴动力股份有限公司 V20发动机曲轴、发动机及车辆
CN111136392A (zh) * 2018-11-05 2020-05-12 大族激光科技产业集团股份有限公司 一种曲轴激光焊接工作站及其方法
CN114055094A (zh) * 2021-12-03 2022-02-18 安徽福本机械制造有限公司 一种工程机械配重块制造方法

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DE3614227A1 (de) * 1986-04-26 1987-11-05 Porsche Ag Kurbelwelle aus einem eisenmetallischen werkstoff fuer hubkolbenmaschinen
DE102014225234A1 (de) 2014-12-09 2016-06-09 Bayerische Motoren Werke Aktiengesellschaft Kurbelwelle für eine Hubkolben-Brennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1255409A (en) * 1917-01-05 1918-02-05 Park Drop Forge Company Counterbalanced crank-shaft.
US1534411A (en) * 1924-01-03 1925-04-21 Lyman J Potter Method and means of counterbalancing crankshafts
US1705187A (en) * 1920-05-27 1929-03-12 Wickliffe Twyman B Counterweight means for crank shafts and process of forming and attaching
US2494569A (en) * 1947-11-19 1950-01-17 Mcmaster Edward Crankshaft balancer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1255409A (en) * 1917-01-05 1918-02-05 Park Drop Forge Company Counterbalanced crank-shaft.
US1705187A (en) * 1920-05-27 1929-03-12 Wickliffe Twyman B Counterweight means for crank shafts and process of forming and attaching
US1534411A (en) * 1924-01-03 1925-04-21 Lyman J Potter Method and means of counterbalancing crankshafts
US2494569A (en) * 1947-11-19 1950-01-17 Mcmaster Edward Crankshaft balancer

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777340A (en) * 1971-06-15 1973-12-11 Renault Device for pre-balancing unbalanced masses on crankshafts
US3987859A (en) * 1973-10-24 1976-10-26 Dresser Industries, Inc. Unitized rotary rock bit
US4356741A (en) * 1977-02-12 1982-11-02 Daimler-Benz Aktiengesellschaft Cast crankshafts
US4445399A (en) * 1978-12-11 1984-05-01 Honda Giken Kogyo Kabushiki Kaisha Process for balancing a crankshaft
US4768397A (en) * 1982-06-28 1988-09-06 Tecumseh Products Compny Lubrication scheme for pressure lubricated crankshafts with counterweight holes for crankshaft balance
US4730512A (en) * 1984-10-23 1988-03-15 Toyota Jidosha Kabushiki Kaisha Engine crankshaft structure
US4703724A (en) * 1986-05-29 1987-11-03 Chrysler Motors Corporation Engine balancing device with a lubricant side discharge
US4703725A (en) * 1986-05-29 1987-11-03 Chrysler Motors Corporation Mounting of an engine balancing device
US4677948A (en) * 1986-05-29 1987-07-07 Chrysler Motors Corporation Lubricating system for an engine balancing device
US5170547A (en) * 1988-06-28 1992-12-15 Valmet Paper Machinery Inc. Method and device for balancing a roll
US5131143A (en) * 1990-07-13 1992-07-21 Gfm Gesellschaft Fur Fertigungstechnik Und Maschinenbau Aktiengesellschaft Method of centering and thus balancing workpieces to be machined only in part
US5633093A (en) * 1991-06-25 1997-05-27 Dana Corporation Counterweight attachment technique
US5463900A (en) * 1993-04-02 1995-11-07 Fichtel & Sachs Ag Balancing process and balanced component after this process
US5836218A (en) * 1995-12-20 1998-11-17 Hyundai Motor Company, Ltd. Crankshaft for cooling pistons
US6135727A (en) * 1999-02-16 2000-10-24 Tecumseh Products Company Detachably affixed counterweight and method of assembly
US6477916B2 (en) * 1999-08-18 2002-11-12 General Electric Company Methods of installing a balance weight for a rotary component in turbomachinery
US20090308343A1 (en) * 2006-04-18 2009-12-17 Ewald Herzog Balancing Shaft
US8413629B2 (en) * 2006-04-18 2013-04-09 Herzog Intertec Gmbh Balancing shaft
US20100132652A1 (en) * 2007-06-14 2010-06-03 Ewald Herzog Balancing shaft
US20100192894A1 (en) * 2007-06-14 2010-08-05 Ewald Herzog Balancing shaft
US8413630B2 (en) * 2007-06-14 2013-04-09 Herzog Intertec Gmbh Balancing shaft
US8413631B2 (en) * 2007-06-14 2013-04-09 Herzog Intertec Gmbh Balancing shaft
US8939123B2 (en) 2009-07-30 2015-01-27 Herzog Intertec Gmbh Countershaft
US8918994B2 (en) * 2012-10-17 2014-12-30 Ford Global Technologies, Llc Balancing a pendulum-absorber crankshaft
US20140102248A1 (en) * 2012-10-17 2014-04-17 Ford Global Technologies, Llc Balancing a pendulum-absorber crankshaft
US10352352B2 (en) * 2017-10-05 2019-07-16 GM Global Technology Operations LLC Machining oval cores in crankshafts
CN111136392A (zh) * 2018-11-05 2020-05-12 大族激光科技产业集团股份有限公司 一种曲轴激光焊接工作站及其方法
CN110953239A (zh) * 2019-12-25 2020-04-03 潍柴动力股份有限公司 V20发动机曲轴、发动机及车辆
CN110953239B (zh) * 2019-12-25 2021-03-16 潍柴动力股份有限公司 V20发动机曲轴、发动机及车辆
CN114055094A (zh) * 2021-12-03 2022-02-18 安徽福本机械制造有限公司 一种工程机械配重块制造方法
CN114055094B (zh) * 2021-12-03 2023-10-03 安徽福本机械制造有限公司 一种工程机械配重块制造方法

Also Published As

Publication number Publication date
FR2040224A1 (de) 1971-01-22
DE2018273A1 (de) 1970-11-12
GB1313491A (en) 1973-04-11
NL7015572A (de) 1972-04-25

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