DE102019216345A1 - Worm for a worm gear and method for producing such worms - Google Patents
Worm for a worm gear and method for producing such worms Download PDFInfo
- Publication number
- DE102019216345A1 DE102019216345A1 DE102019216345.9A DE102019216345A DE102019216345A1 DE 102019216345 A1 DE102019216345 A1 DE 102019216345A1 DE 102019216345 A DE102019216345 A DE 102019216345A DE 102019216345 A1 DE102019216345 A1 DE 102019216345A1
- Authority
- DE
- Germany
- Prior art keywords
- worm
- facets
- feed
- varied
- toothing
- 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.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F19/00—Finishing gear teeth by other tools than those used for manufacturing gear teeth
- B23F19/002—Modifying the theoretical tooth flank form, e.g. crowning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F13/00—Making worms by methods essentially requiring the use of machines of the gear-cutting type
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- 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
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- 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
- F16H55/14—Construction providing resilience or vibration-damping
- F16H55/16—Construction providing resilience or vibration-damping relating to teeth only
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- 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
- F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
Abstract
Verfahren zur Herstellung der Verzahnung einer Schnecke für ein Schneckengetriebe, wobei die Schnecke mit einer Maschine spanend hergestellt wird, wobei an der Maschine durch einen Vorschub die Schnecke oder ein Werkzeug translatorisch bewegt wird, wobei die Geschwindigkeit des Vorschubs nicht konstant ist und gezielt variiert wird. Schnecke, die nach dem erfindungsgemäßen Verfahren hergestellt wurde und eine Verzahnungsoberfläche aufweist, bei der die Breite der Vorschubfacetten entlang der Verzahnungswendel der Schnecke nicht konstant istMethod for producing the toothing of a worm for a worm gear, the worm being machined with a machine, the worm or a tool being moved in translation on the machine by a feed, the speed of the feed being not constant and being varied in a targeted manner. Worm which was produced according to the method according to the invention and has a toothing surface in which the width of the feed facets along the toothing helix of the screw is not constant
Description
Die vorliegende Erfindung betrifft eine Schnecke zur Anwendung in Schneckengetrieben und ein Verfahren zur Herstellung der Verzahnung einer solchen Schnecke.The present invention relates to a worm for use in worm gears and a method for producing the toothing of such a worm.
Stand der TechnikState of the art
In elektrisch unterstützten Antrieben werden oft Schneckengetriebe verwendet, wie z.B. in Lenkgetrieben oder in E-Bikes. Bei Lenkgetrieben dient ein Elektromotor dazu, die Lenkbewegung zu unterstützen, wobei die Rotation des Motors durch ein Schneckengetriebe umgewandelt wird. Bei diesen Anwendungsfällen gibt es hohe Anforderungen hinsichtlich Akustik und Haptik.Worm gears are often used in electrically assisted drives, e.g. in steering gears or in e-bikes. In steering gears, an electric motor is used to support the steering movement, the rotation of the motor being converted by a worm gear. In these applications there are high requirements in terms of acoustics and haptics.
Schnecken-Verzahnungen werden üblicherweise in einem spanenden Prozess, beispielsweise durch Fräsen, Wirbeln, Schleifen oder Wälzschälen, hergestellt. An der Maschine wird dabei ein konstanter Vorschub eingestellt, wobei entweder das Werkzeug oder das Werkstück bewegt wird. Während des Prozesses bilden sich in regelmäßiger Abfolge Späne.Worm gears are usually produced in a machining process, for example by milling, whirling, grinding or skiving. A constant feed is set on the machine, with either the tool or the workpiece being moved. Chips form in regular succession during the process.
Nachteilig bei dem beschriebenen Zerspanprozess ist, dass die Zahnflanken der Schnecken-Verzahnung aus periodischen Vorschubfacetten aufgebaut werden. Facetten sind kleine, aneinander angrenzende Flächen auf der Verzahnung, welche mikroskopisch oder auch mit bloßem Auge zu erkennen sind. Im Betrieb des Schneckengetriebes können die Facetten beim Abwälzen Schwingungen anregen, die bei entsprechenden Resonanzen verstärkt werden und zu nicht tolerierbaren Geräuschen und/oder Haptik führen können.The disadvantage of the machining process described is that the tooth flanks of the worm gear teeth are built up from periodic feed facets. Facets are small, adjacent surfaces on the toothing, which can be seen microscopically or with the naked eye. During the operation of the worm gear, the facets can excite vibrations during rolling, which are amplified with corresponding resonances and can lead to intolerable noises and / or haptics.
Es ist damit Aufgabe der Erfindung, eine Schnecken-Verzahnung so auszubilden und ein Verfahren dafür bereitzustellen, bei dem die Facettenstruktur so verändert ist, dass beim Abwälzen im Schneckengetriebe möglichst nur geringe Geräusche entstehen.It is therefore the object of the invention to design a worm tooth system in such a way and to provide a method for this in which the facet structure is changed in such a way that as little noise as possible occurs when rolling in the worm gear.
Diese Aufgabe wird durch die Lehre von Anspruch 1 gelöst, indem die Vorschubgeschwindigkeit der Zerspanmaschine nicht konstant ist sondern gezielt variiert wird. Dadurch wird die Breite der Facetten in Vorschubrichtung fortlaufend oder abschnittsweise verändert. Die vorher regelmäßige Anordnung der Facetten wird damit gestört.This object is achieved by the teaching of claim 1 in that the feed speed of the cutting machine is not constant but is varied in a targeted manner. As a result, the width of the facets is changed continuously or in sections in the feed direction. The previously regular arrangement of the facets is thus disturbed.
Die Variation des Vorschubs kann unterschiedlich erfolgen, beispielsweise sägezahnförmig, blockweise oder sinusförmig. Auch Kombinationen dieser Varianten sind möglich.The feed can be varied in different ways, for example in a sawtooth, block or sinusoidal shape. Combinations of these variants are also possible.
Ein Ausführungsbeispiel wird anhand der Figuren beschrieben. Dabei zeigen:
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1a eine sägezahnförmige Variation des Vorschubs -
1b eine sinusförmige Variation des Vorschubs -
2 eine Getriebeschnecke für ein Lenkgetriebe -
3a schematisch ein Ausschnitt einer Verzahnungsflanke einer Getriebeschnecke mit dem Facettenbild nach dem Stand der Technik -
3b schematisch ein Ausschnitt einer Verzahnungsflanke einer Getriebeschnecke mit einem erfindungsgemäßen Facettenbild
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1a a sawtooth-shaped variation of the feed -
1b a sinusoidal variation of the feed -
2 a worm gear for a steering gear -
3a schematically a section of a tooth flank of a worm gear with the facet image according to the prior art -
3b schematically a section of a tooth flank of a worm gear with a facet image according to the invention
In der
In der
In der
In der
In der
In einer weiteren nicht dargestellten Ausführungsform kann sich entlang der Vorschubrichtung die Facettenbreite auch abschnittsweise ändern, so dass jeweils innerhalb eines Abschnitts gleiche Facettenbreiten vorliegen, diese Breite aber zwischen benachbarten Abschnitten unterschiedlich ist. Eine solche Ausprägung ergibt sich, wenn der Vorschub blockweise variiert wird.In a further embodiment, not shown, the facet width can also change in sections along the feed direction, so that the same facet widths are present within a section, but this width is different between adjacent sections. Such a characteristic results when the feed is varied in blocks.
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019216345.9A DE102019216345B4 (en) | 2019-10-23 | 2019-10-23 | Worm for a worm gear and method of making such worms |
FR2010288A FR3102380B1 (en) | 2019-10-23 | 2020-10-08 | Worm gear worm and method of producing it |
CN202011140816.6A CN112696480A (en) | 2019-10-23 | 2020-10-22 | Worm for a worm gear and method for producing such a worm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019216345.9A DE102019216345B4 (en) | 2019-10-23 | 2019-10-23 | Worm for a worm gear and method of making such worms |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102019216345A1 true DE102019216345A1 (en) | 2021-04-29 |
DE102019216345B4 DE102019216345B4 (en) | 2022-08-25 |
Family
ID=75378646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102019216345.9A Active DE102019216345B4 (en) | 2019-10-23 | 2019-10-23 | Worm for a worm gear and method of making such worms |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN112696480A (en) |
DE (1) | DE102019216345B4 (en) |
FR (1) | FR3102380B1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10350649B3 (en) * | 2003-10-29 | 2005-09-01 | Jörg Dipl.-Ing. Hermes | Process for milling worm wheels optimizing the contact pattern used in CNC milling machines comprises using an excessive worm wheel cutter having an outer diameter which is larger than in the nominal state |
DE102011115241A1 (en) * | 2011-01-18 | 2012-07-19 | Liebherr-Verzahntechnik Gmbh | Method for milling a worm wheel and device for this purpose |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653290A (en) * | 1970-06-29 | 1972-04-04 | Gleason Works | Gear generating method and apparatus |
US7682222B2 (en) * | 2004-05-26 | 2010-03-23 | The Gleason Works | Variable rate method of machining gears |
DE102014005274A1 (en) * | 2014-04-09 | 2015-10-29 | KAPP Werkzeugmaschinen GmbH | Process for hard finishing a workpiece with a worm-shaped machining tool |
CN107666980B (en) * | 2015-05-28 | 2019-12-03 | 格里森工场 | Bevel gear teeth outside of belly structural deflection |
EP3600744A1 (en) * | 2017-03-28 | 2020-02-05 | Klingelnberg AG | Process for machining a gear workpiece, and corresponding pair of gears |
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2019
- 2019-10-23 DE DE102019216345.9A patent/DE102019216345B4/en active Active
-
2020
- 2020-10-08 FR FR2010288A patent/FR3102380B1/en active Active
- 2020-10-22 CN CN202011140816.6A patent/CN112696480A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10350649B3 (en) * | 2003-10-29 | 2005-09-01 | Jörg Dipl.-Ing. Hermes | Process for milling worm wheels optimizing the contact pattern used in CNC milling machines comprises using an excessive worm wheel cutter having an outer diameter which is larger than in the nominal state |
DE102011115241A1 (en) * | 2011-01-18 | 2012-07-19 | Liebherr-Verzahntechnik Gmbh | Method for milling a worm wheel and device for this purpose |
Also Published As
Publication number | Publication date |
---|---|
CN112696480A (en) | 2021-04-23 |
DE102019216345B4 (en) | 2022-08-25 |
FR3102380A1 (en) | 2021-04-30 |
FR3102380B1 (en) | 2024-03-08 |
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R163 | Identified publications notified | ||
R012 | Request for examination validly filed | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |