WO2012013339A1 - Agencement d'un poids d'équilibrage sur un arbre d'équilibrage - Google Patents

Agencement d'un poids d'équilibrage sur un arbre d'équilibrage Download PDF

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Publication number
WO2012013339A1
WO2012013339A1 PCT/EP2011/003758 EP2011003758W WO2012013339A1 WO 2012013339 A1 WO2012013339 A1 WO 2012013339A1 EP 2011003758 W EP2011003758 W EP 2011003758W WO 2012013339 A1 WO2012013339 A1 WO 2012013339A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive wheel
balance
shaft
balance shaft
weight
Prior art date
Application number
PCT/EP2011/003758
Other languages
German (de)
English (en)
Inventor
Andreas Zeller
Winfried JÄGER
Manfred Kohlhepp
Marc HÖFNER
Original Assignee
Gkn Sinter Metals Holding 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 Gkn Sinter Metals Holding Gmbh filed Critical Gkn Sinter Metals Holding Gmbh
Publication of WO2012013339A1 publication Critical patent/WO2012013339A1/fr

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Classifications

    • 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
    • F16F15/22—Compensation of inertia forces
    • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
    • F16F15/264—Rotating balancer shafts

Definitions

  • the invention relates to a balance shaft, in particular for an internal combustion engine, with at least one releasably secured to the balance shaft or a drive wheel balancing weight and releasably attached to the drive shaft for transmitting a drive torque drive wheel, wherein the drive wheel on the balancer front side with at least one axial connecting element is attached and the drive wheel and the balance weight abut each other directly.
  • balance shafts are used to reduce or eliminate the free mass forces.
  • Balance shafts also serve to reduce the operating noise and vibrations of the engines.
  • imbalances in the form of eccentric weights are attached to the balance shaft. The mass forces generated thereby in the movement of the balancing shaft counteract those of the crank mechanism.
  • the balance shafts are driven by gears, chains or timing belts from the crankshaft and in synchronism with the crankshaft. Depending on the engine type, one usually uses one or two balance shafts which run at single or double crankshaft speed.
  • the balance shafts must be arranged so that the centers of gravity of the pistons and the eccentric weights lie on a line parallel to the cylinder axes, so that the common center of gravity of the pistons and the eccentric weights no longer moves.
  • EP 0 922 883 B1 describes a balance shaft with a drive wheel mounted on the front side on the balancing shaft and with a balancing weight.
  • a specific embodiment of a drive wheel and extending into the drive wheel projection whereby a compact design of a balance shaft to be achieved.
  • the drive wheel can be formed as a sintered part.
  • a flattening is attached to the basic shaft, to which the drive wheel is pushed in a form-fitting manner.
  • a corresponding flattening is also attached to the projection of the balance weight, so that the torque from the drive wheel is transferable on the one hand to the fundamental and on the other hand to the balance weight.
  • DE 103 20 747 A1 describes a balancing shaft for an internal combustion engine, wherein at least the balancing shaft consists of a hollow shaft and a hollow shaft attached to the hollow shaft.
  • CONFIRMATION COPY welded connection component is made as a sintered part.
  • the attachment component as a sintered component is connected to the hollow shaft by friction welding.
  • the balance weight is first pushed positively over the hollow body and then connected by means of high pressure forming the hollow shaft undetachably connected to the shaft.
  • DE 41 17 876 C1 discloses a hollow drive shaft with a balancing mass, wherein the balancing mass may be formed of a sintered material.
  • the balance weights can be designed as sintered components, but can not be described as separate components since they are connected to the drive or control shaft.
  • the invention is therefore based on the object to provide a balance shaft, which allows easy installation and a space-and position-optimized arrangement of a balance weight.
  • a balance shaft which solves the problem, is a balance shaft, in particular for an internal combustion engine, with at least one releasably secured to the balance shaft balance weight and releasably attached to the drive shaft for transmitting a drive torque drive wheel, wherein the drive wheel on the balance shaft frontally with at least one axially acting connecting element is fixed and the drive wheel and the balance weight lie directly against each other, wherein the balance weight is a powder metallurgy produced component, in particular a sintered component, is.
  • the balance weight and / or the drive wheel is a component produced by powder metallurgy, in particular a sintered component
  • the balance weight and the drive wheel are a component produced by powder metallurgy, in particular a sintered component. Due to the design of the counterweight as a powder metallurgy produced component, the possibility is now created to use powder metallurgical manufacturing options for training the balance weight. An advantage which results in this case is that it is largely possible to dispense with conventional mechanical processing since very precise tolerances can be maintained with powder metallurgical production possibilities.
  • the powder metallurgy production allows a high weight accuracy over a variety of components without or only with very little effort in the mechanical processing. It is particularly advantageous if the drive wheel and the balance weight are a component produced by powder metallurgy, in particular a sintered part, since then the advantages described above can best be utilized.
  • a further advantage results when the drive wheel has at least one depression, at least in the direction of the counterbalance weight, and the balance weight has at least one elevation which extends into the depression.
  • the drive wheel has at least one opening and the balance weight has at least one elevation that extends into the opening, this results in a further advantage of the invention.
  • the compensating weight may be sufficient, for example, by means of an increase in the opening.
  • the balance weight can extend through at least one, preferably two, and more preferably more than two openings of the drive. It is thus possible to partially position the balance weight into the gear.
  • the openings in the drive wheel are formed symmetrically.
  • an advantage is achieved when the balance weight is positively connected to the drive wheel, in particular screwed. Screwing the balance weight with the drive wheel has the advantage that an easy mounting of the balance weight on the drive wheel is made possible.
  • the screw as a possible alternative of a non-positive connection also offers the advantage of a cost-effective design of the connection between the balance weight, drive wheel and balance shaft.
  • Another advantage arises when the drive wheel has at least two preferably diametrically arranged holes and the balance weight through the bores. gene is screwed through to the drive wheel. Through the formation of holes in the drive wheel, which cooperate, for example, with threaded holes in the counterweights, a simple and thus cost-effective attachment of the counterweight on the drive wheel is possible.
  • a diametrical arrangement of the bores or threaded holes enables a balanced weight distribution of the masses on the balancing shaft.
  • two diametrically arranged holes are introduced into the drive wheel, which cooperate with two threaded holes in the balance weight, and thus enable a positionally accurate fastening of the balance weight on the drive wheel or on the balance shaft.
  • the drive wheel has at least two openings symmetrically distributed over the circumference and the balance weight has at least one elevation which extends into the opening, wherein the elevation terminates flush with a surface of the drive wheel.
  • two elevations are formed on the balance weight, which cooperate with two symmetrically distributed over the circumference openings on the drive wheel.
  • the powder-metallurgical production possibilities make it possible to adapt the elevations very precisely to the openings in the drive wheel, so that joining of the drive wheel and balance weight can take place without or almost without machining of the balance weight. Closes the survey flush with a surface of the drive wheel, so there is the advantage that a flush, flat surface is formed, which can serve as a mounting aid when mounting, for example. If the elevations and an outer surface of the drive wheel form a plane, this may also facilitate quality control, so that it is easy for an installer to see whether the drive wheel has been properly joined to the counterweight. A further advantage results when the balance weight extends around the balancing shaft in the form of a partial circle and cylinder section.
  • the balancing weight is designed to be part-circular and cylinder-segment-shaped, then the balancing weight is in a design that can be described as a C-shape.
  • a C-shaped design makes it possible to position a high mass fraction on or on the balance shaft and / or on the drive wheel.
  • the balance weight may be attached to the drive wheel so that it rests exclusively on the drive wheel. This gives the advantage that the shaft in the region of the position of the drive wheel and the compensating element requires no special processing to position the balance weight on the balance shaft, which in turn represents a cost advantage.
  • the balance weight and / or the drive wheel is positively connected to the balance shaft.
  • a positive connection of balance weight and / or drive wheel on the balance shaft has the advantage that a very accurate positioning of the balance weight and / or the drive wheel on the shaft is made possible. In addition, it is possible to allow additional positioning or fixing of the compensation element or the drive wheel on the shaft.
  • the balance shaft comprises at least a shaft, a balance weight and a drive wheel.
  • a positive connection for example in the form of a groove or a flattening or a toothing between shaft and balance weight and / or drive wheel has the advantage that an easy mounting of the balance weight and / or the drive wheel is made possible.
  • a positive connection offers the possibility of a high power transmission, for example, between the drive wheel and shaft.
  • the balance weight is positively connected to the balancer shaft and frictionally held between an end face of the balancer shaft and the drive wheel.
  • Such a combination of balance weight and balance shaft offers the possibility of easy and safe mounting of the balance weight and the drive wheel. If, for example, the balance weight is provided with a conical bore and at the same time the shaft end of the balance shaft is provided with a conical end, fixing and secure positioning of the balance weight on the drive shaft can be achieved by means of a non-positive connection of the drive wheel to the balance shaft.
  • a frictional connection of the drive wheel on the balance shaft has the advantage that the balance weight and the drive wheel are easy to assemble. In the case of a screw connection, compliance with a predefinable installation force is easily possible.
  • balance weight is exclusively connected to the drive wheel and rests on the drive wheel.
  • the drive wheel and the balance weight are pre-assembled and can be fastened as a module to the balance shaft.
  • the advantage that only the mounting surface for the drive wheel is to be machined on the balance shaft which in turn represents a cost advantage in relation to the mechanical processing of the balance shaft.
  • Preferred materials for the powder metallurgical component are iron-based materials, in particular those iron-based materials with a carbon content of 0.2 wt .-% to 0.8 wt .-%.
  • Iron-base materials have the advantage that they are available on the one hand as powder metallurgical materials at low cost and on the other hand have high strength values as finished components.
  • individual base materials have high specific weights, which generate high mass forces, in particular with regard to use as eccentric weights.
  • alloys based on iron and copper and / or molybdenum and / or nickel and / or chromium and / or manganese are used for the powder metallurgical component. By using different alloys, it is possible to adapt the powder-metallurgical component, in particular the balance weight and the drive wheel, to the requirements in the internal combustion engine or the material pairings of the balance shaft.
  • the object is achieved in that a method for producing a balance shaft is provided, in which for forming a flywheel balance unit first a balance weight is attached to a drive wheel and that subsequently the compensation unit is attached to the balance shaft.
  • the inventive method has the advantage that the assembly of drive wheel and balance weight is pre-assembled. On the one hand, this facilitates assembly on the balance shaft and, on the other hand, position-accurate and position-optimized arrangement between the drive wheel and the balance weight. Position inaccuracies or tolerance inaccuracies can thus be detected and remedied at an early stage.
  • FIG. 1 shows a sectional view through a balance shaft with a positive connection between the balance weight and the drive shaft;
  • FIG. 2 shows a three-dimensional view of a drive wheel with a balance weight partially positioned in the drive wheel
  • FIG. 3 shows a three-dimensional view of a further embodiment of a connection between a drive wheel and a balance weight; 4 shows a balance weight according to FIGS. 3 and
  • FIG. 1 shows a section through a balancing shaft 1, a balancing weight 2 and a driving wheel 3.
  • the drive wheel 3 is held on the balance shaft 1 by means of an axial connection element 4.
  • the axial connecting element 4 is drawn as a screw connection, wherein the axial connecting element 4 is a screw which cooperates with a threaded bore 6 in the balancing shaft 1.
  • the balancing shaft is, for example, a balance shaft 1 for an internal combustion engine and, for example, received and stored in a cylinder crankcase.
  • the balance weight 2 is positively connected to the balance shaft 1.
  • An elevation 7 is formed on the balance weight, which firstly extends into a recess 8 of the drive wheel 3 and extends through an opening 9 to a surface 10 of the drive wheel 3.
  • the drive wheel may have recesses 8 and / or openings 9, which are preferably arranged symmetrically on the circumference of the drive wheel 3.
  • a symmetrical arrangement of recesses 8 and 9 openings in the drive wheel 3 is included.
  • the drive wheel 3 is, for example, a gear, a sprocket, a toothed belt, a toothed pulley or a V-belt pulley, which indirectly or directly by a crankshaft of an internal combustion engine is drivable.
  • the drive wheel 3 is provided with a toothing 11.
  • FIG. 2 shows a three-dimensional view of a drive wheel 12 and a compensation weight 13, wherein a frictional connection with the balance shaft is possible.
  • the drive wheel 12 has a central bore 14 for connecting the drive wheel 12 with the balance shaft, as shown by way of example in FIG. 1.
  • the compensating element 13 has two elevations 15, 16 which extend through symmetrical openings 17, 18, 19, 20 of the drive wheel 12.
  • On the balance weight 13, two elevations 15, 16 are arranged, which terminate flush with a surface 21 of the drive wheel 12.
  • the elevations 15, 16 point through the openings 19, 20 and thus shift the center of gravity of the balance weight 13 in the direction of the drive wheel 12.
  • the center of gravity of the balance weight 13 and thus the entire balance shaft can thus be varied within wide ranges and as far as possible to one end of the Balancing shaft to be shifted.
  • the powder metallurgical production of the compensation element 13 in the form of a sintered component makes it possible here to move the balancing weight 13 and in particular the balancing mass center of gravity purposefully in the direction of the drive wheel 12.
  • An advantage here is that sintered components 13 can be manufactured with high accuracy, so that a reworking for fitting the sintered components 13 in the drive wheel 12 can be almost dispensed with.
  • FIG. 3 shows a further connection between a drive wheel 22 and a compensation element 23 in a three-dimensional representation.
  • the drive wheel 22 basically has a drive wheel 12 corresponding to the structure of FIG. 2, wherein the drive wheel 22 is provided with two diametrical bores. Through the diametrical holes in the drive wheel 22 axial screw 24, 25 are guided, which connect the balance weight 23 to the drive wheel 22 frictionally. In such an embodiment, it is possible that the balance weight 23 rests exclusively on the drive wheel 22. As a result, the advantage is achieved that a balance shaft is to be processed exclusively on the contact surface for the drive wheel 22.
  • the drive wheel 22 has a central bore 26, by means of which the drive wheel 22 with the balance shaft 27 is connectable.
  • the balancing shaft 27 is visible in regions through the symmetrical openings 28, 29 of the drive wheel 22.
  • a thread 30 is introduced, so that the drive wheel 22 with the balancer shaft 27 is non-positively connected.
  • Fig. 4 is a balance weight 31 shown in FIG. 3 in a three-dimensional representation and detached from the drive wheel.
  • the balancing weight 31 is formed teilnik- and cylinder-section-shaped and also described as C-shaped beschreibbar.
  • At the part-circular and cylindrical section-shaped base body 32 which surrounds the balance shaft part-circular and cylindrical section-shaped elevations 33, 34 integrally formed.
  • the balance weight 31 has threaded bores 35, 36 which are introduced diametrically into the balance weight 31, so that the balance weight 31 can be mounted non-positively, in particular by means of a screw connection to a drive wheel.
  • phases 37 and bevels 38 are mounted, which are also introduced during the powder metallurgical production of the sintered component 31, wherein the phases 37 and / or the slopes 38 can serve as mating aids.
  • the elevations 33, 34 have a continuously constant width B, but may also be provided with shoulders, as shown for example in the elevations 15, 16 of FIG. 1 in section, the elevations 15, 16 have thereby within the drive wheel. 3 different widths B, so that a paragraph is formed.
  • FIG. 5 shows a three-dimensional view of a drive wheel 39, a balance weight 40 and a balance shaft 41.
  • the balancing shaft 41 is shown tapering in the region of the balancing weight 40, so that only the drive wheel 39 bears against the balancing shaft 41 with a contact surface 42.
  • the balance weight 40 has an inner diameter that is greater than the diameter of the balance shaft 41, so that the balance weight 40 comes to rest on the drive wheel 39 only.
  • the balance weight 40 encloses the balancer shaft 41 part-circle and cylindrical section-shaped.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Balance (AREA)

Abstract

L'invention concerne un arbre d'équilibrage (1, 27), en particulier pour un moteur à combustion interne, comprenant au moins un poids d'équilibrage (2, 13, 23, 31, 40) fixé de manière amovible sur l'arbre d'équilibrage (1, 27) et une roue d'entraînement (3, 12, 22, 39) fixée de manière amovible sur l'arbre d'équilibrage (1, 27) pour le transfert d'un couple. La roue d'entraînement (3, 12, 22, 39) est fixée sur l'arbre d'équilibrage (1, 27) du côté frontal par au moins un élément de liaison axial (4, 24, 25) et la roue d'entraînement (3, 12, 22, 39) et le poids d'équilibrage (2, 13, 23, 31, 40) s'appliquent directement l'un contre l'autre, le poids d'équilibrage (2, 13, 23, 31, 40) étant un composant (2, 13, 23, 31, 40) fabriqué par une métallurgie des poudres, en particulier un composant fritté.
PCT/EP2011/003758 2010-07-28 2011-07-27 Agencement d'un poids d'équilibrage sur un arbre d'équilibrage WO2012013339A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010032530 DE102010032530A1 (de) 2010-07-28 2010-07-28 Anordnung eines Ausgleichsgewichts an einer Ausgleichswelle
DE102010032530.9 2010-07-28

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WO2012013339A1 true WO2012013339A1 (fr) 2012-02-02

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WO (1) WO2012013339A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN104832593B (zh) * 2014-11-28 2017-01-18 北汽福田汽车股份有限公司 平衡轴总成和发动机
CN111720518A (zh) * 2019-03-19 2020-09-29 米巴精密零部件（中国）有限公司 齿轮

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117876C1 (en) 1991-05-31 1992-08-13 Bayerische Motoren Werke Ag, 8000 Muenchen, De Hollow IC engine camshaft with equalising mass - has extra weight of fluidic material in cavity widening bounded by eccentric peripheral sectionc
DE4309245A1 (de) * 1993-03-23 1994-09-29 Bayerische Motoren Werke Ag Kurbelwelle, insbesondere für Brennkraftmaschinen
DE4319333A1 (de) * 1993-06-11 1994-12-22 Toan Dat Dipl Ing Tran Kurbelwelle mit Massenausgleich zweiter Ordnung
US5476369A (en) * 1994-07-25 1995-12-19 Tecumseh Products Company Rotor counterweight insert apparatus
DE19723378A1 (de) * 1996-06-13 1998-01-02 Volkswagen Ag Ausgleichswelle für eine Hubkolben-Brennkraftmaschine
EP0922883A1 (fr) * 1997-12-10 1999-06-16 Volkswagen Aktiengesellschaft Arbre d'équilibrage en particulier pour un moteur à combustion interne
EP1113188A1 (fr) * 1999-12-31 2001-07-04 Peugeot Citroen Automobiles Masselotte d'équilibrage en particulier pour roue de véhicule
US6291920B1 (en) * 2000-06-15 2001-09-18 A. O. Smith Corporation Motor counter weight attachment
WO2004099648A1 (fr) * 2003-05-09 2004-11-18 Daimlerchrysler Ag Arbre d'equilibrage pour un moteur a combustion interne et procede de production dudit arbre

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117876C1 (en) 1991-05-31 1992-08-13 Bayerische Motoren Werke Ag, 8000 Muenchen, De Hollow IC engine camshaft with equalising mass - has extra weight of fluidic material in cavity widening bounded by eccentric peripheral sectionc
DE4309245A1 (de) * 1993-03-23 1994-09-29 Bayerische Motoren Werke Ag Kurbelwelle, insbesondere für Brennkraftmaschinen
DE4319333A1 (de) * 1993-06-11 1994-12-22 Toan Dat Dipl Ing Tran Kurbelwelle mit Massenausgleich zweiter Ordnung
US5476369A (en) * 1994-07-25 1995-12-19 Tecumseh Products Company Rotor counterweight insert apparatus
DE19723378A1 (de) * 1996-06-13 1998-01-02 Volkswagen Ag Ausgleichswelle für eine Hubkolben-Brennkraftmaschine
EP0922883A1 (fr) * 1997-12-10 1999-06-16 Volkswagen Aktiengesellschaft Arbre d'équilibrage en particulier pour un moteur à combustion interne
EP0922883B1 (fr) 1997-12-10 2003-06-25 Volkswagen Aktiengesellschaft Arbre d'équilibrage en particulier pour un moteur à combustion interne
EP1113188A1 (fr) * 1999-12-31 2001-07-04 Peugeot Citroen Automobiles Masselotte d'équilibrage en particulier pour roue de véhicule
US6291920B1 (en) * 2000-06-15 2001-09-18 A. O. Smith Corporation Motor counter weight attachment
WO2004099648A1 (fr) * 2003-05-09 2004-11-18 Daimlerchrysler Ag Arbre d'equilibrage pour un moteur a combustion interne et procede de production dudit arbre
DE10320747A1 (de) 2003-05-09 2004-12-09 Daimlerchrysler Ag Ausgleichswelle für eine Brennkraftmaschine und ein Verfahren zur Herstellung derselben

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