WO1999013241A1 - Rolling mechanism - Google Patents

Rolling mechanism Download PDF

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Publication number
WO1999013241A1
WO1999013241A1 PCT/EP1998/005660 EP9805660W WO9913241A1 WO 1999013241 A1 WO1999013241 A1 WO 1999013241A1 EP 9805660 W EP9805660 W EP 9805660W WO 9913241 A1 WO9913241 A1 WO 9913241A1
Authority
WO
WIPO (PCT)
Prior art keywords
cage
transmission according
gear
ujälzkörper
axis
Prior art date
Application number
PCT/EP1998/005660
Other languages
German (de)
French (fr)
Inventor
Ulrich Stahl
Original Assignee
Ulrich Stahl
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 Ulrich Stahl filed Critical Ulrich Stahl
Publication of WO1999013241A1 publication Critical patent/WO1999013241A1/en

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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
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear

Definitions

  • the invention relates to a planetary gear with gears according to the preamble of claim 1.
  • a gear in which the power transmission on the tooth flanks without sliding, only by rolling, can be referred to as a rolling or rolling gear.
  • It has the advantage that a much better transmission efficiency is achieved by replacing the sliding friction with the smaller rolling friction. This is particularly important for high-ratio gears. They are often built in the form of so-called eccentric or open epicyclic gears, in which the axis of a relatively large planet gear rotates in a slightly larger ring gear, or the "planet gear" is deformed in a rotating manner.
  • the invention guides the UJälz analyses in the cage so that they can only rotate about their axis, separates the cage from the movement of the gears and makes the pitch circle r ⁇ of the cage for the UJälzores the rolling circle for generating the tooth flanks from the outside - and internal toothing.
  • it rotates around a gear-fixed axis, while the axes of the gearwheels are shifted in different directions, but both rotate in the same direction, opposite the cage.
  • FIG. 1 shows a top view of an exemplary embodiment of such a roller drive with an driving torque acting only in one direction on the drive axis (9) (teeth and enlarged to a larger scale).
  • the internally toothed ring gear (3) is connected to the gear housing (10) via elastic tension elements (5) and transmission struts (11) that are bent at right angles so that it is torsionally rigid but remains freely adjustable radially (the opposite pair of springs has been omitted for simplification) .
  • the externally toothed wheel (4) with corresponding spring elements (7) and struts (12) with the drive axle (8) is torsionally rigid but slidably connected.
  • the cage (2) with the U-shaped bodies (1) can rotate about a gear-fixed axis.
  • Figure 2 shows the gearbox according to Figure 1 in section, the roller bearings (13) being represented by symbols.
  • the opposite eccentricity of input (3) and output gear (4) on the drive axle can be seen here.
  • Figure 3 shows some consecutive phases of the movement of the gear wheels (3, 4) and UJälz stresses (1).
  • the drive axis is rotated by approx. 42, the cage moves by 1.66.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)

Abstract

A planetary gear with a high transmission ratio and power transmission by means of roll bodies, which are guided in a cage in such a way that they can only rotate around their axis. Upon opposite eccentricity and synchronous rotation of the central points of both gearwheels, the cage rotates slowly in an inverse direction around a central point on the transmission. The moments of the planetary gears are transmitted via elastic couplings, preferably via parallel flexional bar systems.

Description

ROLLGETRIEBE ROLLER GEARBOX
Die Erfindung betrifft ein Planetengetriebe mit Zahnrädern nach dem Oberbegriff won Anspruch 1. Man kann solch ein Getriebe, bei dem die Kraftübertragung an den Zahnflanken ohne Gleiten, nur über Abwälzen erfolgt, als Wälz- oder Rollgetriebe bezeichnen. Es hat den V/orteil, daß über den Ersatz der Gleitreibung durch die kleinere Rollreibung ein wesentlich besserer Getriebewirkungsgrad erreicht wird. Besonders wichtig ist dies bei hochübersetzenden Getrieben. Sie sind oft in der Form sog. Exzenter- oder offener Umlaufgetriebe gebaut, bei denen die Achse eines relatiυ großen Planetenrades in einem nur wenig größeren Hohlrad rotiert, oder das "Planetenrad" rotierend υerformt wird.The invention relates to a planetary gear with gears according to the preamble of claim 1. Such a gear, in which the power transmission on the tooth flanks without sliding, only by rolling, can be referred to as a rolling or rolling gear. It has the advantage that a much better transmission efficiency is achieved by replacing the sliding friction with the smaller rolling friction. This is particularly important for high-ratio gears. They are often built in the form of so-called eccentric or open epicyclic gears, in which the axis of a relatively large planet gear rotates in a slightly larger ring gear, or the "planet gear" is deformed in a rotating manner.
Die Verwendung υon UJälzkörpern in einem Zahnradgetriebe wurde zwar schon in der DPS 2235554 vorgeschlagen, doch konnten dort die UJälzkörper in einem mit dem Planetenrad umlaufenden Käfig nur in Umfangsrichtung und nicht radial geführt werden. Dadurch fehlte die Zwangsführung, die eine präzise, wiederkehrende Rollbeωegung mit achsparallelen lilälzkörpern garantieren kann. Die Verwendung υon geführten UJälzkörpern wurde schon in CH-PS 142829, DE-PS 512604, DE-PS 542206, EP 77490, dort aber nur für geschlossene Kurvengetriebe, gezeigt.The use of U-shaped bodies in a gear transmission was already proposed in DPS 2235554, but the U-shaped bodies could only be guided there in a circumferential direction and not radially in a cage rotating with the planet gear. As a result, there was no positive guidance, which can guarantee a precise, recurring rolling motion with axially parallel anti-friction bodies. The use of guided UJälzkörper was already shown in CH-PS 142829, DE-PS 512604, DE-PS 542206, EP 77490, but only there for closed cam gears.
Die Erfindung führt die UJälzkörper so im Käfig, daß sie nur noch um ihre Achse rotieren können, trennt den Käfig dabei v/on der Bewegung der Zahnräder und macht den Teilkreis r^ des Käfigs für die UJälzkörper zum Rollkreis für die Erzeugung der Zahnflanken υon Außen- und Innenυerzahnung . In einer υorteilhaf ten Ausführung rotiert er um eine getriebefeste Achse, während die Achsen der Zahnräder dagegen in unterschiedlicher Richtung verschoben, aber beide in gleichem, dem Käfig entgegengesetzten Dr.ehsinn rotieren.The invention guides the UJälzkörper in the cage so that they can only rotate about their axis, separates the cage from the movement of the gears and makes the pitch circle r ^ of the cage for the UJälzkörper the rolling circle for generating the tooth flanks from the outside - and internal toothing. In an advantageous embodiment, it rotates around a gear-fixed axis, while the axes of the gearwheels are shifted in different directions, but both rotate in the same direction, opposite the cage.
Um das Drehmoment υon der(n) rotierenden Achse(n) auf Gehäuse oder An- oder Abtriebsachse zu leiten bedarf es eines Ausglelchselements. Zur Verringerung der Reibungsυerluste und der Baulänge sind hier elestische Kupplungen senkrecht zur Getriebeachse υon Vorteil, wie nach DE-P5 19501224 oder 4307662. Bild 1 zeigt in Draufsicht eine beispielhafte Ausführung solch eines Rollgetriebes mit einem nur in einer Richtung auf der Antriebsachse (9) wirkenden Aπtriebsmoment (Zähne u. . unmaßstäblich υergrößert). Das innenυerzahnte Hohlrad (3) ist über rechtwinklig gebogene, elastische Zugelemente (5) und Übertragungsstreben (11) so mit dem Getriebegehäuse (10) verbunden, daß es zwar drehsteif gehalten, aber radial frei einstellbar bleibt (das entgegengesetzte Federnpaar wurde zur Vereinfachung weggelassen). Ähnlich ist das außenverzahnte Rad (4) mit entsprechenden Federelementen (7) und Streben (12) mit der Antriebsachse (8) drehsteif aber υerschieblich υerbunden. Der Käfig (2) mit den UJälzkörpern (1) kann um eine getriebefeste Achse rotieren.In order to direct the torque υ from the rotating axis (s) to the housing or input or output axis, a compensation element is required. In order to reduce the friction losses and the overall length, elastic couplings perpendicular to the gear axis are advantageous, as described in DE-P5 19501224 or 4307662. Figure 1 shows a top view of an exemplary embodiment of such a roller drive with an driving torque acting only in one direction on the drive axis (9) (teeth and enlarged to a larger scale). The internally toothed ring gear (3) is connected to the gear housing (10) via elastic tension elements (5) and transmission struts (11) that are bent at right angles so that it is torsionally rigid but remains freely adjustable radially (the opposite pair of springs has been omitted for simplification) . Similarly, the externally toothed wheel (4) with corresponding spring elements (7) and struts (12) with the drive axle (8) is torsionally rigid but slidably connected. The cage (2) with the U-shaped bodies (1) can rotate about a gear-fixed axis.
Bild 2 zeigt das Getriebe nach Bild 1 im Schnitt, wobei die Wälzlager (13) durch Symbole dargestellt werden. Die gegensätzliche Exzentrizität υon An- (3) und Abtriebsrad (4) auf der Antriebsachse ist hier zu erkennen.Figure 2 shows the gearbox according to Figure 1 in section, the roller bearings (13) being represented by symbols. The opposite eccentricity of input (3) and output gear (4) on the drive axle can be seen here.
Bild 3 zeigt einige hintereinanderfolgende Phasen der Bewegung der Zahnräder (3, 4) und UJälzkörper (1). Bei einer Drehung der Antriebsachse um ca. 42 bewegt sich hier der Käfig um 1.66 . Figure 3 shows some consecutive phases of the movement of the gear wheels (3, 4) and UJälzkörper (1). When the drive axis is rotated by approx. 42, the cage moves by 1.66.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Planetengetriebe mit einem inπenverzahnten Hohlrad, einem darin umlaufenden außenverzahnten Rad und Übertragung der Kräfte auf die Zahnflanken durch UJälzkörper, dadurch gekennzeichnet, daß die UJälzkörper (1) so in einem Käfig (2) aufgenommem werden, daß sie innerhalb des Käfigs nur um Ihre Achse rotieren können und ihr Teilkreis gleichzeitig Rollkrεis für die Zahnflanken von Innen- und Außenυerzahnung ist.1. Planetary gear with an internally toothed ring gear, an external toothed wheel rotating therein and transmission of the forces to the tooth flanks by UJälzkörper, characterized in that the UJälzkörper (1) are received in a cage (2) that they are only within the cage for yours Axis can rotate and its pitch circle is at the same time rolling crisscross for the tooth flanks of the internal and external teeth.
2. Getriebe nach Anspruch 1, dadurch gekennzeichnet, daß der Käfig (2) mit den UJälzkörpern (1) nur um seinen Mittelpunkt kreist.2. Transmission according to claim 1, characterized in that the cage (2) with the UJälzkörper (1) circles only around its center.
3. Getriebe nach Anspruch 2, dadurch gekennzeichnet, daß die Achsen der An- (3) und Abtriebsräder (4) synchron, aber auf entgegengesetzten Seiten um den Mittelpunkt des Käfigs (2) kreisen .3. Transmission according to claim 2, characterized in that the axes of the drive (3) and driven wheels (4) synchronously, but on opposite sides orbit around the center of the cage (2).
4. Getriebe nach einem der Ansprüche 1 oder 3, dadurch gekennzeichnet, daß4. Transmission according to one of claims 1 or 3, characterized in that
UJälzkörper (1) nur in einer Drehrichtung υorgesehen sind.UJälzkörper (1) are intended only in one direction of rotation.
5. Getriebe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als UJellenkupplungen Systeme paralleler Biegebalken in einer zur Getr iebeachse senkrechten Ebene dienen.5. Transmission according to one of claims 1 to 4, characterized in that systems of parallel bending beams are used as UJellenkupplungen in a plane perpendicular to the gear axis.
6. Getriebe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Flanken der Verzahnungen der Zahnräder (3) und (4) aus Äquidistanten zu verlängerten Zykloiden des Käfigteilkreises gebildet werden, der um bzw. im UJälzkreis des jeweiligen Zahnrads abroll .6. Transmission according to one of claims 1 to 5, characterized in that the flanks of the toothing of the gears (3) and (4) from equidistant to elongated cycloids of the cage pitch circle are formed, which roll around or in the U-pitch circle of the respective gear.
7. Getriebe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Zahnflanken im Wesentlichen aus Eυolυeπten bestehen. 7. Transmission according to one of claims 1 to 6, characterized in that the tooth flanks consist essentially of Eυolυeπten.
8. Getriebe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Durchmesser der Wälzkörper in den Lagern (13) größer als die Exzentrizität des jeweiligen Zahnrads (3 oder 4) sind . 8. Transmission according to one of claims 1 to 7, characterized in that the diameter of the rolling elements in the bearings (13) are greater than the eccentricity of the respective gear (3 or 4).
PCT/EP1998/005660 1997-09-08 1998-09-07 Rolling mechanism WO1999013241A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19739222.9 1997-09-08
DE1997139222 DE19739222A1 (en) 1997-09-08 1997-09-08 Rolling gear

Publications (1)

Publication Number Publication Date
WO1999013241A1 true WO1999013241A1 (en) 1999-03-18

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WO (1) WO1999013241A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375214A (en) * 2001-05-02 2002-11-06 Virtual Access Ltd Secure payment method and system

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH142829A (en) 1928-12-03 1930-10-15 Deckel Fa Friedrich transmission gear.
DE512604C (en) 1927-06-14 1930-11-15 Friedr Deckel Praez Smechanik Over or reduction gear
DE542206C (en) 1932-01-21 Friedr Deckel Praez Smechanik Over and reduction gears
US2750807A (en) * 1952-03-06 1956-06-19 Miyazaki Kazushige Special internal engaging gear set
DE2235554A1 (en) 1971-07-30 1973-02-22 Soudure Autogene Elect FRICTION-FREE SPUR GEAR REVERSING GEAR FOR LARGE REDUCTION RATIO
EP0077490A2 (en) 1981-10-20 1983-04-27 Advanced Energy Concepts '81 Ltd. Gearing mechanism
EP0090214A1 (en) * 1982-03-26 1983-10-05 Advanced Energy Concepts '81 Ltd. Epicyclic transmission having free rolling roller driving elements
JPS61140653A (en) * 1984-12-11 1986-06-27 Ntn Toyo Bearing Co Ltd Trochoid reducer
DE3819756A1 (en) * 1988-06-10 1989-12-14 Yonggang Prof Shi HIGH-REDUCING GEARBOX WITH AN INTERLOCKING CYCLOID IN THE GEAR
DE4307662A1 (en) 1992-04-21 1993-08-12 Ulrich Dr Ing Stahl Compensating element for rotationally rigid transfer of rotary motion - has bending connecting springs guided over compensator straps to form closed, square outline
DE19501224A1 (en) 1995-01-17 1995-06-22 Ulrich Dr Stahl Compensating device esp. for radial axle stagger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2151340A1 (en) * 1971-10-15 1973-04-19 Jens Dr Rer Nat Geerks ECCENTRIC GEAR

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE542206C (en) 1932-01-21 Friedr Deckel Praez Smechanik Over and reduction gears
DE512604C (en) 1927-06-14 1930-11-15 Friedr Deckel Praez Smechanik Over or reduction gear
CH142829A (en) 1928-12-03 1930-10-15 Deckel Fa Friedrich transmission gear.
US2750807A (en) * 1952-03-06 1956-06-19 Miyazaki Kazushige Special internal engaging gear set
DE2235554A1 (en) 1971-07-30 1973-02-22 Soudure Autogene Elect FRICTION-FREE SPUR GEAR REVERSING GEAR FOR LARGE REDUCTION RATIO
EP0077490A2 (en) 1981-10-20 1983-04-27 Advanced Energy Concepts '81 Ltd. Gearing mechanism
EP0090214A1 (en) * 1982-03-26 1983-10-05 Advanced Energy Concepts '81 Ltd. Epicyclic transmission having free rolling roller driving elements
JPS61140653A (en) * 1984-12-11 1986-06-27 Ntn Toyo Bearing Co Ltd Trochoid reducer
DE3819756A1 (en) * 1988-06-10 1989-12-14 Yonggang Prof Shi HIGH-REDUCING GEARBOX WITH AN INTERLOCKING CYCLOID IN THE GEAR
DE4307662A1 (en) 1992-04-21 1993-08-12 Ulrich Dr Ing Stahl Compensating element for rotationally rigid transfer of rotary motion - has bending connecting springs guided over compensator straps to form closed, square outline
DE19501224A1 (en) 1995-01-17 1995-06-22 Ulrich Dr Stahl Compensating device esp. for radial axle stagger

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 336 (M - 535)<2392> 14 November 1986 (1986-11-14) *
PT WERKTUIGBOUW, vol. 33, no. 9, September 1978 (1978-09-01), pages 502 - 507, XP002090232 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375214A (en) * 2001-05-02 2002-11-06 Virtual Access Ltd Secure payment method and system

Also Published As

Publication number Publication date
DE19739222A1 (en) 1999-05-20

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