WO2021223845A1 - Engrenage ayant au moins deux rangées de dents décalées axialement et dans le sens de rotation - Google Patents

Engrenage ayant au moins deux rangées de dents décalées axialement et dans le sens de rotation Download PDF

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Publication number
WO2021223845A1
WO2021223845A1 PCT/EP2020/062407 EP2020062407W WO2021223845A1 WO 2021223845 A1 WO2021223845 A1 WO 2021223845A1 EP 2020062407 W EP2020062407 W EP 2020062407W WO 2021223845 A1 WO2021223845 A1 WO 2021223845A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
toothed
toothed disks
rotation
teeth
Prior art date
Application number
PCT/EP2020/062407
Other languages
German (de)
English (en)
Inventor
Harald KÖNIG
Original Assignee
X-Invent 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 X-Invent Gmbh filed Critical X-Invent Gmbh
Priority to EP20724077.1A priority Critical patent/EP4146957A1/fr
Priority to PCT/EP2020/062407 priority patent/WO2021223845A1/fr
Publication of WO2021223845A1 publication Critical patent/WO2021223845A1/fr

Links

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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F16H55/18—Special devices for taking up backlash
    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F16H2055/0893—Profiling for parallel shaft arrangement of toothed members

Definitions

  • Gear with at least two rows of teeth offset axially and in the direction of rotation
  • the invention relates to a gearwheel with at least two rows of circumferential teeth that are axially offset and in the direction of rotation, the gearwheel being provided with toothed disks bauglei one below the other, according to the preamble of claim 1.
  • Gears with several rows of teeth offset in the direction of rotation have the advantage over single-row gears that more pairs of teeth can be in mesh at the same time, so that both the transferable power and the smoothness can be improved.
  • gears of this type are also used in gear pumps or gear motors in order to make the delivery flow or the drive power as uniform as possible, as indicated in EP 0004 119 A2.
  • gear wheels or a generic gear wheel that can be manufactured with simple, structurally identical parts, enables a high profile overlap even without helical gearing, ensures low-friction and low-noise tooth engagement at high loads, and can maintain optimal tooth flank backlash better than that is the case with previous gears, including helical gears.
  • a plurality of toothed disks which are axially and movably in the direction of rotation, precisely fitted onto a shaft and preferably have positioning elements on the mutually facing side surfaces that can lead to a form fit, are fastened to a sleeve by means of tension element (s), which is connected to this shaft is positively connected, the toothed washers position themselves axially and in the direction of rotation, as well as on the sleeve, when the tensile force is exerted, in such a way that the desired offset in the direction of rotation is achieved, and the tooth flank play is finely regulated in relation to a toothed complementary part can.
  • tension element s
  • Tooth module in multi-row gears Due to the split into several toothed disks Tooth module in multi-row gears, larger tooth thicknesses and gaps can be used, and the start of engagement of the teeth for both directions of rotation of the respective tooth flank pairs under load can thus be relocated to the area of the ideal pitch point. This results in a smooth and low-noise start of engagement that exceeds the smoothness of previous gears.
  • an adjustable gap can also be provided between the tooth flanks of the Hirth gears involved, which allows fine adjustment of the backlash of the circumferential gears of the gears.
  • gears according to the invention due to their construction from toothed disks of identical construction, can be manufactured inexpensively in the casting and hobbing process, or in any other manufacturing process for large-scale production according to the given state of the art.
  • the Hirth serration can also be manufactured with sufficient precision for this purpose in the casting process without mandatory subsequent machining will.
  • a toothed pulley combination which consists of two toothed pulleys for both directions of rotation, is referred to below as a “double toothed pulley”.
  • Hirth toothing is always used in the description and in the claims, but in the basic idea of the invention, all form-fitting elements can be used that can be attached to the side surfaces of the toothed pulleys 3 with sufficient accuracy and mechanical stress, to produce the desired offset between adjacent toothed pulleys. All such positive-locking elements fall under the term “Hirth coupling” in the description and claims.
  • the invention is not limited to the illustrated and described exemplary embodiments, but can be modified in various ways.
  • the Hirth toothing in meshing packages can be made the same for both toothed pulley packages if this is possible in terms of the tolerance and load, which lowers manufacturing costs and simplifies storage. If different load peaks reliably occur in the different directions, the thickness of the toothed washers can be adapted, or a conventional gear pair is combined with the package according to the invention for the “heavy” direction for the “easy” direction.
  • the self-positioning properties of the toothed pulleys according to the invention can be used not only for the novel, asymmetrical tooth geometries described in more detail below, but also for conventional, symmetrical involute gears.
  • the described toothed disks which are movable on the shaft and to be fastened to a sleeve, can also be used in the manner according to the invention without self-positioning lateral formations, in order to easily fit toothed disks with mass production tolerances with optimal play:
  • Each individual toothed disk is pulled onto the intended shaft during assembly, then preassembled “with a stop” on the tooth flanks of the complementary toothing, and then connected to the sleeve using the appropriate screws, bolts, etc. that pierce all toothed disks.
  • all industrial processes glue, welding, honing, etc.
  • toothed disks according to the invention is also used to reduce the torsional vibrations excited by the toothing one-and-the-same shaft, which add up to tooth combinations with different overall modules, can be used.
  • FIG. 3 shows a gear wheel according to the invention, meshing with a counter gear, in plan view and the mode of operation of the backlash regulation.
  • gear 1 meshing with a second gear 2, also according to the invention, both attached to their shafts 3 with so-called “cuffs” 4, as well as a section through four so-called “toothed disks” 5, 6, along one in front of the axes 3 Plane intersecting the Hirth serrations 7, 8, graphically indicated by the line A.
  • the sleeve 4 is arranged in a rotationally fixed manner, if necessary formed in one piece with it.
  • three double toothed disks 9, 10 per gear 1, 2 are freely movable on the shaft 3, and are arranged axially one behind the other.
  • the toothed disks 5, 6 have Hirth serrations 7, 8 on both flanks, as does the sleeve 4 on its side facing the toothed disks 5, 6.
  • the toothed disks have 5, 6 teeth in their circumference, which are called “circumferential teeth” to distinguish them from those of the Hirth tooth system.
  • the Hirth serration is attached to the toothed disks in such a way that, after the corresponding prepositioning according to the invention and subsequent axial contraction of the lined up toothed disks up to the form fit, it shifts the circumferential toothing of all toothed disks by that part of the gear wheel module in the direction of rotation that is required by to achieve an even distribution of all circumferential teeth and thus also tooth gaps of the same size between all circumferential teeth engaging one after the other.
  • the required partial module offset 12, 13, 14 is a third of the amount of the circumferential tooth pitch.
  • four tooth tip areas of the double toothed pulleys 9, 10 are shown graphically as bars in the three-dimensional representation
  • the contraction of the toothed disks 5, 6 movable on the shafts 3 can take place according to the invention with one or more tension elements, e.g. with a counter-collar 15 that can be screwed continuously onto the shaft 3 from the side opposite the collar 4, and can take place in such a way , that all Toothed pulleys are so firmly connected to the sleeve 4 that the torque to be transmitted by the peripheral teeth is completely introduced into the shaft.
  • one or more tension elements e.g. with a counter-collar 15 that can be screwed continuously onto the shaft 3 from the side opposite the collar 4, and can take place in such a way , that all Toothed pulleys are so firmly connected to the sleeve 4 that the torque to be transmitted by the peripheral teeth is completely introduced into the shaft.
  • a spring element (or a corresponding servomotor to be controlled via sensors, or a hydraulic system) 16 can be provided for regulating the backlash when combing the circumferential toothing shown in FIG A degressive force act on the pulleys in the axial direction. As shown in FIG. 3, this axially acting force can then be translated into a torque acting in the direction of rotation for regulating the backlash of the circumferential toothing with the aid of an additional positioning of the Hirth toothing offset by a gap.
  • the toothed disks of gear 1, with which the tooth flank backlash is regulated, are dimensioned slightly wider than the toothed disks of the permanently configured gear 2 due to the axially absorbable spring deflection has, so it is also equipped with a spring element, or in the complementary meshing gear 2 a simpler (working without adjustment in the direction of rotation) axial entrainment mechanism is installed.
  • the part of the involute toothing located in front of the pitch point can be dispensed with because at the same time further tooth flanks, offset according to the invention, ensure permanent contact of tooth flanks on the same shaft: these tooth flanks are indicated by dashed lines in the area of points 22, 24, 25.
  • Rotation counterclockwise results in a kinematical profile coverage factor of at least two with three toothed pulleys.
  • the toothed pulleys which run without a load, therefore produce neither increased abrasion nor noise, despite the tooth flank movement being carried out in one of the two directions of rotation.
  • Other combinations of the directions of rotation than is provided with the double toothed disks are possible in the manner according to the invention, provided that the required distribution of the forces and moments does not conflict with this.
  • FIG. 3 is used to illustrate the regulation of backlash between the tooth flanks of the circumferential toothing of meshing gears according to the invention.
  • Shown in plan view is a gearwheel with toothed disks 31 firmly interlocked with one another, as well as a somewhat differently composed gearwheel 32 for backlash regulation, both gearwheels meshing with one another in the area of the circumferential teeth 33, 34, 35, 36.
  • the permanently toothed gear 31 has toothed disks with the circumferential toothing according to the invention with asymmetrical teeth, as well as Hirth gears 37 attached to both sides of the toothed disks, which are also shown in enlarged detail and which are positively connected to one another.
  • the gear wheel 31 has toothed disks in which the Hirth teeth are attached offset by an additional gap in the circumferential direction, so that, for example: the tooth flanks 33 and 34 already rest on the tooth flanks of the teeth 35, 36 before the form fit of the Hirth teeth 38 has taken place completely, with one flank of the associated teeth resting on the counter-toothing in each case with the Hirth toothing, and a gap remains open on the other side of the counter-toothing.
  • the axially acting force 39 translated by the pitch of the teeth of the Hirth toothing, is converted into the forces 40 and 41 acting in the direction of rotation. This would "in principle" have to close the remaining one
  • the pitch of the Hirth toothing and the preferably degressive axial force 39 can be designed in such a way that on the one hand: the moment with which the peripheral teeth are pretensioned tends to practically zero, but at the same time ensures a sufficient tracking effect for permanent tooth flank contact when the thrust is reversed, and on the other hand: every moment that the Circumferential toothing acts back on the toothed disks and exceeds a dangerous maximum value, leads to the toothed disks dodging, and thus can be cushioned and damped - a task that is taken over in the design example with spring element 16 by targeted layered disc springs.
  • a combination of toothed disks 5, 6 with different overall modules can also be used to reduce or partially smooth the torsional vibrations excited by the toothing.
  • the invention is not limited to the illustrated and described exemplary embodiment, but can be modified in various ways. So other basic shapes of teeth can be used to form the teeth according to the invention, if only small torques are reliably transmitted in one direction of rotation, the toothed disks for this direction of rotation can be made thinner than those for the other direction of rotation, and the like.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

L'invention concerne un engrenage (1) présentant au moins deux rangées de dents circonférentielles décalées axialement et dans le sens de rotation. Dans le but d'obtenir une production précise et économique, selon l'invention, l'engrenage (1) présente des roues dentées (5, 6) structurellement identiques les unes aux autres. Des éléments de réglage (7, 8) servant à régler le décalage des roues dentées (5, 6) dans le sens de rotation et des dents asymétriques servant à transmettre des charges particulièrement élevées sont décrits dans des modes de réalisation.
PCT/EP2020/062407 2020-05-05 2020-05-05 Engrenage ayant au moins deux rangées de dents décalées axialement et dans le sens de rotation WO2021223845A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20724077.1A EP4146957A1 (fr) 2020-05-05 2020-05-05 Engrenage ayant au moins deux rangées de dents décalées axialement et dans le sens de rotation
PCT/EP2020/062407 WO2021223845A1 (fr) 2020-05-05 2020-05-05 Engrenage ayant au moins deux rangées de dents décalées axialement et dans le sens de rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/062407 WO2021223845A1 (fr) 2020-05-05 2020-05-05 Engrenage ayant au moins deux rangées de dents décalées axialement et dans le sens de rotation

Publications (1)

Publication Number Publication Date
WO2021223845A1 true WO2021223845A1 (fr) 2021-11-11

Family

ID=70554069

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/062407 WO2021223845A1 (fr) 2020-05-05 2020-05-05 Engrenage ayant au moins deux rangées de dents décalées axialement et dans le sens de rotation

Country Status (2)

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EP (1) EP4146957A1 (fr)
WO (1) WO2021223845A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004119A2 (fr) 1978-03-10 1979-09-19 Theodorus Henricus Korse Machine à engrenages avec des roues dentées décalées l'une par rapport à l'autre en direction circonférentielle
US4612816A (en) * 1983-10-28 1986-09-23 Lazar Chalik Gear assembly
EP0476802A1 (fr) * 1990-09-20 1992-03-25 Chiba Dies Co., Ltd. Pair d'engrenages
DE102004058178A1 (de) * 2004-12-02 2006-06-08 Man Nutzfahrzeuge Ag Zahnrad
KR20110112652A (ko) * 2010-04-07 2011-10-13 삼성테크윈 주식회사 기어 장치
DE102010027300A1 (de) * 2010-07-16 2012-01-19 Neumayer Tekfor Holding Gmbh Stirnrad, Fertigung eines Systems zur Drehmomentübertragung und entsprechendes System
DE102014222771A1 (de) * 2014-11-07 2016-05-12 Schaeffler Technologies AG & Co. KG Zahnrad sowie Zahnradpaarung mit dem Zahnrad
US9618108B2 (en) * 2013-07-17 2017-04-11 Achates Power, Inc. Gear noise reduction in opposed-piston engines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004119A2 (fr) 1978-03-10 1979-09-19 Theodorus Henricus Korse Machine à engrenages avec des roues dentées décalées l'une par rapport à l'autre en direction circonférentielle
US4612816A (en) * 1983-10-28 1986-09-23 Lazar Chalik Gear assembly
EP0476802A1 (fr) * 1990-09-20 1992-03-25 Chiba Dies Co., Ltd. Pair d'engrenages
DE102004058178A1 (de) * 2004-12-02 2006-06-08 Man Nutzfahrzeuge Ag Zahnrad
KR20110112652A (ko) * 2010-04-07 2011-10-13 삼성테크윈 주식회사 기어 장치
DE102010027300A1 (de) * 2010-07-16 2012-01-19 Neumayer Tekfor Holding Gmbh Stirnrad, Fertigung eines Systems zur Drehmomentübertragung und entsprechendes System
US9618108B2 (en) * 2013-07-17 2017-04-11 Achates Power, Inc. Gear noise reduction in opposed-piston engines
DE102014222771A1 (de) * 2014-11-07 2016-05-12 Schaeffler Technologies AG & Co. KG Zahnrad sowie Zahnradpaarung mit dem Zahnrad

Also Published As

Publication number Publication date
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