WO2008138664A1 - Vis sans fin d'engrenage, engrenage à vis sans fin, courroie d'entraînement - Google Patents

Vis sans fin d'engrenage, engrenage à vis sans fin, courroie d'entraînement Download PDF

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Publication number
WO2008138664A1
WO2008138664A1 PCT/EP2008/053294 EP2008053294W WO2008138664A1 WO 2008138664 A1 WO2008138664 A1 WO 2008138664A1 EP 2008053294 W EP2008053294 W EP 2008053294W WO 2008138664 A1 WO2008138664 A1 WO 2008138664A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
worm
worm gear
threaded elements
threaded
Prior art date
Application number
PCT/EP2008/053294
Other languages
German (de)
English (en)
Inventor
Max Fiedler
Patrick Schroeder
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2008138664A1 publication Critical patent/WO2008138664A1/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
    • F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
    • F16H55/24—Special devices for taking up backlash

Definitions

  • the invention relates to a worm gear according to the preamble of claim 1, a worm gear according to claim 10 and a drive train, in particular a window lift drive train for motor vehicles according to claim 11.
  • the worm gear is to be manufactured, for example, by injection molding, there is the difficulty that the worm gear can only be demolded from a two-part injection mold if the boundary between the parts of the injection mold runs in the axial direction, ie substantially perpendicular to the threads.
  • this leads to a production-technically unavoidable plastic ridge extending transversely to the thread flank.
  • the tool-technical removal of such a ridge, especially by grinding, is costly and therefore economically uninteresting, especially since it must be ensured that the threads take no damage.
  • the invention is therefore based on the object to propose a gear worm with a globoid thread, the production technology as simple as possible and can be produced at low cost and with high precision.
  • the invention is based on the idea not to form the globoid thread in one piece, but from at least two separate threaded elements.
  • This multi-part design of the globoid thread ie a longitudinally-cut at least approximately double-concave contoured thread, it is possible to produce the individual, in particular made of plastic, threaded elements in a high-precision injection molding process. In this case, a separate injection mold is provided for each threaded element. It is within the scope of the invention, the threaded elements, for example in
  • Formulate multicomponent spray directly to a shaft or set after their manufacture on a shaft or put together to a globoid thread Another major advantage of the multi-part design of the globoid thread is that the threads can be detected better metrologically than in a one-piece globoid thread.
  • the core diameter and / or the threaded element diameter (outer diameter) of each threaded element increases only in one axial direction.
  • each threaded element tapers with advantage only in an axial direction, thus at least approximately has a frustoconical contour with a concavely curved lateral surface.
  • Such trained threaded elements can be optimally made of a multi-part, in particular two-part injection mold - about
  • the contact plane between the parts of the injection mold preferably extends transversely to the longitudinal extension of the threaded elements, so that no axially extending, only costly to remove burrs arise.
  • the globoid thread is formed from exactly two threaded elements.
  • both threaded elements - apart from the thread pitch - the same outer contour so both are the same size with an at least approximately frusto-conical outer contour formed with a concave curved surface.
  • Threaded element diameter opposite.
  • the threads of the two uniform thread elements viewed in opposite directions from the respective large thread element diameter in the direction of the respective small thread element diameter, are in opposite directions.
  • One of the threaded elements thus has a right-hand thread starting from the large thread diameter, whereas the other threaded element likewise has a left-hand thread starting from the large thread diameter.
  • the threaded elements are spaced apart in the axial direction.
  • the worm gear comprises a shaft, in particular an armature shaft of an electric drive motor, on which at least one of the threaded elements is fixed or is integrally formed with the at least one of the threaded elements.
  • At least one of the threaded elements preferably all threaded elements, in particular by encapsulation, advantageously in a Mehrkomponentenspritz- method, integral with the shaft, in particular the armature shaft is / are.
  • At least one of the threaded elements is designed as a component independent of the shaft, which can be secured against rotation on the shaft.
  • At least one further threaded element of the shaft which may be integrally formed with the shaft or fixed to the shaft, variable to thereby influence the self-locking of a gear formed with such a worm gear and the transmission synchronization and to be able to take on the noise.
  • the at least one threaded element in its angular position relative to the shaft or relative to at least one further threaded element adjustable and fixable in the desired position on the shaft.
  • the invention also relates to a worm gear with at least one gear wheel, which with a previously described Combining gear screw meshes.
  • worm gears are used in motor vehicles, since due to the separate design of the threaded elements of the worm gear in a simple way strict noise requirements can be met.
  • the invention relates to a drive train with a previously described worm gear.
  • an armature shaft of an electric drive motor is designed as a worm with at least two separate transmission elements.
  • FIG. 1 shows in the single FIGURE 1, a worm gear with a worm gear whose globoid thread is formed of two separate threaded elements.
  • a worm gear 1 as it can be used for example in a power window drive train in a motor vehicle, shown.
  • a shaft 2 of a worm gear 3 as an armature shaft of a not shown
  • the worm gear 3 is provided with a globoid thread 4, which has a symmetrical, substantially double-concave outer contour in a longitudinal section.
  • a gear 5 with an external toothing 6 in the torque-transmitting engagement.
  • the globoid thread 4 is formed in this embodiment of two separate threaded elements 7, 8.
  • the threaded elements 7, 8 are uniformly shaped in the form of a truncated cone with a concave curved surface. Looking at each threaded element 7, 8 from the direction of the respective larger diameter di in the direction of the respective smaller diameter d 2 , it can be seen that the threads 9, 10 are in opposite directions. This is necessary in order to achieve a uniform thread progression in the assembled globoid thread 4.
  • the threaded elements 7, 8 are retrofitted, i. after their separate production by injection molding on the shaft 2 has been established.
  • the threaded elements 7, 8, whose respective small diameter d 2 face each other, are arranged at an axial distance a from each other.
  • the distance a can influence on the self-locking of the worm gear 1 and the synchronization of the worm gear can be taken.
  • the threaded elements 7, 8 were fixed in this embodiment by means of an adhesive on the outer circumference of the shaft 2.
  • the core diameter d k for each threaded element 7, 8 only increases in an axial direction.
  • the core diameter d k of the threaded member 7 grows in the left axial direction in the plane of the drawing, whereas the core diameter d k of the threaded member 8 increases in the right axial direction in the plane of the drawing. This ensures that both threaded elements 7, 8 can be unscrewed out of their respective injection mold after they have hardened.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne une vis sans fin d'engrenage (3) présentant un filet globique (4), en particulier pour un engrenage à vis sans fin (1) dans un mécanisme de commande de véhicule automobile. L'invention prévoit que le filet globique (4) soit formé d'au moins deux éléments de filet séparés (7, 8).
PCT/EP2008/053294 2007-05-16 2008-03-19 Vis sans fin d'engrenage, engrenage à vis sans fin, courroie d'entraînement WO2008138664A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007023161.1 2007-05-16
DE200710023161 DE102007023161A1 (de) 2007-05-16 2007-05-16 Getriebeschnecke, Schneckengetriebe, Antriebsstrang

Publications (1)

Publication Number Publication Date
WO2008138664A1 true WO2008138664A1 (fr) 2008-11-20

Family

ID=39443558

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/053294 WO2008138664A1 (fr) 2007-05-16 2008-03-19 Vis sans fin d'engrenage, engrenage à vis sans fin, courroie d'entraînement

Country Status (2)

Country Link
DE (1) DE102007023161A1 (fr)
WO (1) WO2008138664A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015226770A1 (de) * 2015-12-29 2017-06-29 Robert Bosch Gmbh Getriebeantriebseinrichtung für ein Kraftfahrzeug sowie Komfortantrieb
CN106438849A (zh) * 2016-11-22 2017-02-22 中国空气动力研究与发展中心低速空气动力研究所 一种分体涡轮蜗杆机构
IT201700105691A1 (it) * 2017-09-21 2017-12-21 Franco Ferrini Riduttore iperboloidico ad attrito volvente
NL2025061B1 (en) 2020-03-05 2021-10-14 Mci Mirror Controls Int Netherlands B V Adjustment device, and method for assembling
CN111361032B (zh) * 2020-03-12 2021-08-24 嘉兴德基机械设计有限公司 用于高强度结构陶瓷再加工的放置型加工框架设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR905903A (fr) * 1943-09-25 1945-12-18 Engrenage à vis sans fin divisée en plusieurs parties
GB721930A (en) * 1952-09-18 1955-01-12 Nat Res Dev Worm gearing
GB1037129A (en) * 1963-04-20 1966-07-27 Zd Y V I Plzen Duplex globoid worm
DE8508681U1 (de) 1985-03-22 1985-07-04 Brose Fahrzeugteile GmbH & Co KG, 8630 Coburg Schneckenrad-Getriebe für einen Verstellantrieb in einem Kraftfahrzeug, insbesondere einer Sitzverstellung
EP0527121A1 (fr) * 1991-08-05 1993-02-10 IGM - ROBOTERSYSTEME Aktiengesellschaft Transmission pour entraînement d'une articulation notamment pour robot industriel
WO2005106284A1 (fr) * 2004-04-28 2005-11-10 Peiseler Gmbh & Co.Kg Engrenage a vis sans fin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR905903A (fr) * 1943-09-25 1945-12-18 Engrenage à vis sans fin divisée en plusieurs parties
GB721930A (en) * 1952-09-18 1955-01-12 Nat Res Dev Worm gearing
GB1037129A (en) * 1963-04-20 1966-07-27 Zd Y V I Plzen Duplex globoid worm
DE8508681U1 (de) 1985-03-22 1985-07-04 Brose Fahrzeugteile GmbH & Co KG, 8630 Coburg Schneckenrad-Getriebe für einen Verstellantrieb in einem Kraftfahrzeug, insbesondere einer Sitzverstellung
EP0527121A1 (fr) * 1991-08-05 1993-02-10 IGM - ROBOTERSYSTEME Aktiengesellschaft Transmission pour entraînement d'une articulation notamment pour robot industriel
WO2005106284A1 (fr) * 2004-04-28 2005-11-10 Peiseler Gmbh & Co.Kg Engrenage a vis sans fin

Also Published As

Publication number Publication date
DE102007023161A1 (de) 2008-11-20

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