WO1994021935A1 - Engaging device in a vehicle gear box - Google Patents

Engaging device in a vehicle gear box Download PDF

Info

Publication number
WO1994021935A1
WO1994021935A1 PCT/SE1994/000231 SE9400231W WO9421935A1 WO 1994021935 A1 WO1994021935 A1 WO 1994021935A1 SE 9400231 W SE9400231 W SE 9400231W WO 9421935 A1 WO9421935 A1 WO 9421935A1
Authority
WO
WIPO (PCT)
Prior art keywords
engaging
gear
teeth
angle
surface portion
Prior art date
Application number
PCT/SE1994/000231
Other languages
English (en)
French (fr)
Inventor
Grzegorz Janiszewski
Original Assignee
Ab Volvo
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 Ab Volvo filed Critical Ab Volvo
Priority to AU63883/94A priority Critical patent/AU6388394A/en
Priority to DE4491682T priority patent/DE4491682T1/de
Priority to DE4491682A priority patent/DE4491682C2/de
Priority to US08/522,334 priority patent/US5626213A/en
Publication of WO1994021935A1 publication Critical patent/WO1994021935A1/en

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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0618—Details of blocking mechanism comprising a helical spring loaded element, e.g. ball
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0656—Details of the tooth structure; Arrangements of teeth
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0656—Details of the tooth structure; Arrangements of teeth
    • F16D2023/0668—Details relating to tooth end or tip geometry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19284—Meshing assisters

Definitions

  • the present invention relates to an engaging device for a gear freely rotatably mounted on a shaft in a transmission, for locking said gear to the shaft or releasing the gear from the shaft, comprising an engaging sleeve mounted non-rotatable but axially displaceable relative to the shaft, and provided with engaging teeth, and a toothed rim joined to said gear and provided with corresponding engaging teeth, said engaging teeth having pointed end portions and opposite flanks connected thereto, each of said flanks being provided with a step spaced from said end portion, so as to form first surface portions inclined from the pointed end portion towards the step, on the engaging teeth of the engaging sleeve and of said gear.
  • Engaging devices of this type are generally used in modern motor vehicle gearboxes.
  • the inwardly inclined surface portions of the tooth flanks are designed to increase the engaging force of the engaging sleeves, i.e. prevent an engaged gear from "popping out” due to the engaging sleeve being displaced from its engaged position under high torque load and during power shifting.
  • the inwardly inclined surface of the tooth flank causes the force acting on the flank in the rotational direction to have a force component acting in the engagement direction of the engaging sleeve, the magnitude of said force component depending on the angle of the inclined surface portion relative to the rest of the flank surface.
  • the purpose of the present invention is to provide an engaging device of the type described by way of introduction, which combines the two apparently non-compatible properties of small backlash and great security against gear pop-out.
  • tooth flanks of the engaging sleeve are provided with a second step spaced from said first step so that second surface portions are formed which are inclined from the first step towards the second step and which have a smaller angle of inclination relative to a plane parallel to the adjacent flank surfaces inside the second step than said first surface portions.
  • the second surface portion can have an angle of inclination of between 1 and 3°, which provides adequate security against gear disengagement in most cases.
  • the angle of inclination of this surface portion determines the required play, which will be small.
  • the first surface portion can have an angle of inclination of between 3 and 4°, which provides full security in the above described unfortunate cases, since the engaging sleeve, when it is displaced due to insufficient engaging force towards the disengaging position, is caught and blocked by the interaction between its first surface portion in ⁇ clined at a larger angle and the inclined surface portion of the engaging tooth of the free gear.
  • FIG. 1 shows a longitudinal section through one embodiment of an engaging device according to the invention in its disengagement position (upper half) and in an engaged position (lower half) and Figs. 2 and 3 are enlarged plan views of the teeth of the engaging device in different engagement posi ⁇ tions.
  • Fig. 1, 1 designates a shaft in a vehicle gearbox (not shown in more detail here).
  • a first gear 2 and a second gear 3 are rotatably mounted on the shaft.
  • Each gear 2, 3 is made in one piece with a toothed rim 4, having engaging teeth 5, and a synchronizing cone 6, which cooperates with a synchronizing ring 7.
  • An engaging sleeve 8 is, in a conventional manner, mounted to be non-rotatable but axially displaceable on an engaging hub 9, which is non-rotatably fixed to the shaft 1 and has external teeth 10 in engagement with internal teeth 11 on the engaging sleeve 8.
  • the hub 9 is made with a plurality of evenly distributed radial bores, each of which contains a spring 12 and a ball 13.
  • Certain engaging teeth 11 of the engaging sleeve 8 have a central depression 14 into which a ball 13 engages in the neutral position of the engaging sleeve 8 in order to centre the sleeve in a neutral position.
  • Other teeth 11 of the engaging sleeve have a pair of depressions 15 at their ends, into which balls 13 engage in either engagement position and which are designed to load the engaging sleeve 8 towards the engagement position.
  • Figs. 2 and 3 show in a larger scale an engaging tooth 5 of the toothed rim 4 of a gear 2, 3 and an engaging tooth 11 of the engaging sleeve 8.
  • the engaging teeth 5 have a pointed end portion 10 and opposing flanks 21, which are inclined inwards towards the longitudinal axis 19 of the tooth at an angle ⁇ which can be between and 3 and 4°.
  • the teeth 11 of the engaging sleeve 8 also have pointed end portions 22 and flank surface portions 23 adjacent to the end portion and having an inclination corresponding to the incliniation of the flank 21, i.e. they form an angle of between 3 and 4° with the longitudinal axis 24 of the tooth.
  • the teeth 11 of the engaging sleeve 8 have a step 25 between the surface portion 23 and an additional flank surface portion 26 which, via an additional step 27, is connected to tooth flanks 28, which are parallel to the longitudinal axis 24.
  • the surface portion 26 has a smaller inclination than the surface po ⁇ ion 23.
  • ⁇ can be between 1 and 3°.
  • Fig. 2 shows the tooth side of the gear 2, 3 and the teeth 5 and 11, respectively, of the engaging sleeve 8 in normal engagement.
  • the dashed line d-e indicates the line contact between the edge line d-e of the tooth 5 and the surface portion 26 of smaller inclination of the tooth 11. In this position a minimum of backlash is obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Mechanical Operated Clutches (AREA)
  • Arrangement Of Transmissions (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/SE1994/000231 1993-03-19 1994-03-16 Engaging device in a vehicle gear box WO1994021935A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU63883/94A AU6388394A (en) 1993-03-19 1994-03-16 Engaging device in a vehicle gear box
DE4491682T DE4491682T1 (de) 1993-03-19 1994-03-16 Eingriffsvorrichtung in einem Fahrzeuggetriebe
DE4491682A DE4491682C2 (de) 1993-03-19 1994-03-16 Eingriffsvorrichtung in einem Fahrzeuggetriebe
US08/522,334 US5626213A (en) 1993-03-19 1994-03-16 Engaging device in a vehicle gear box

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9300913-2 1993-03-19
SE9300913A SE501051C2 (sv) 1993-03-19 1993-03-19 Kopplingsanordning för ett på en axel i en transmission fritt roterbart lagrat löphjul för låsning av löphjulet på axeln respektive frikoppling av löphjulet från axeln

Publications (1)

Publication Number Publication Date
WO1994021935A1 true WO1994021935A1 (en) 1994-09-29

Family

ID=20389282

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1994/000231 WO1994021935A1 (en) 1993-03-19 1994-03-16 Engaging device in a vehicle gear box

Country Status (5)

Country Link
US (1) US5626213A (sv)
AU (1) AU6388394A (sv)
DE (2) DE4491682C2 (sv)
SE (1) SE501051C2 (sv)
WO (1) WO1994021935A1 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042995A1 (de) * 1997-03-21 1998-10-01 Blw Präzisionsschmiede Gmbh Morphologie-matrix einer kurzverzahnung

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE504648C2 (sv) * 1995-07-10 1997-03-24 Volvo Ab Transmission innefattande kugghjul med snedkugg
EP0846883A1 (de) * 1996-11-16 1998-06-10 GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie Synchronisationseinrichtung für Getriebe und Verfahren zum Anspitzen von Zähnen eines gesinterten Synchronisationskörpers
IT1296137B1 (it) * 1997-11-12 1999-06-09 Iveco Fiat Cambio di velocita' per un autoveicolo provvisto di un gruppo epicicloidale di tipo perfezionato.
DE10152185B4 (de) * 2001-10-23 2006-11-23 Daimlerchrysler Ag Wellenkupplung
DE10312867B3 (de) * 2003-03-19 2004-09-30 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Schaltkupplung
CN2835704Y (zh) * 2005-10-28 2006-11-08 陕西法士特齿轮有限责任公司 主副箱结构的双中间轴十二档汽车变速器
US7992698B1 (en) * 2005-11-11 2011-08-09 Volvo Lastvagnar Ab System for preventing gear hopout in a tooth clutch in a vehicle transmission
DE102014218497A1 (de) * 2014-09-16 2015-10-29 Schaeffler Technologies AG & Co. KG Schaltverzahnung eines Schaltpartners, Kopplungseinheit mit einem derartigen Schaltpartner sowie Fahrzeug mit der Kopplungseinheit
DE102022110034A1 (de) * 2022-04-26 2023-10-26 Audi Aktiengesellschaft Synchronisierungsvorrichtung für ein Gangwechselgetriebe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935965A (en) * 1931-07-16 1933-11-21 Nash Motors Company Clutch mechanism
US3334715A (en) * 1964-01-22 1967-08-08 William H Bibbens Interlocking toothed members
US4727968A (en) * 1986-10-14 1988-03-01 General Motors Corporation Synchronizer clutch assembly
US4848548A (en) * 1987-01-21 1989-07-18 Ford Motor Company Synchronizing clutch for automotive multiple speed transmission

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303915A (en) * 1964-12-11 1967-02-14 Borg Warner Axial locking clutch
US3620338A (en) * 1968-10-21 1971-11-16 Ohaza Ohbayashi Synchronizing speed change gears
DE2061621C3 (de) * 1970-12-15 1974-03-28 Daimler-Benz Ag, 7000 Stuttgart Sperr-Synchronisierung für Kupplungen in Kraftfahrzeug-Wechselgetrieben
JPS4916670U (sv) * 1972-05-19 1974-02-12

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935965A (en) * 1931-07-16 1933-11-21 Nash Motors Company Clutch mechanism
US3334715A (en) * 1964-01-22 1967-08-08 William H Bibbens Interlocking toothed members
US4727968A (en) * 1986-10-14 1988-03-01 General Motors Corporation Synchronizer clutch assembly
US4848548A (en) * 1987-01-21 1989-07-18 Ford Motor Company Synchronizing clutch for automotive multiple speed transmission

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042995A1 (de) * 1997-03-21 1998-10-01 Blw Präzisionsschmiede Gmbh Morphologie-matrix einer kurzverzahnung
US6244413B1 (en) 1997-03-21 2001-06-12 Blw Praezisionsschmiede Gmbh Gearing tooth form
CN1133022C (zh) * 1997-03-21 2003-12-31 Blw精密锻造有限责任公司 短啮合齿

Also Published As

Publication number Publication date
SE9300913L (sv) 1994-09-20
US5626213A (en) 1997-05-06
AU6388394A (en) 1994-10-11
SE501051C2 (sv) 1994-10-31
SE9300913D0 (sv) 1993-03-19
DE4491682C2 (de) 2003-04-30
DE4491682T1 (de) 1996-01-25

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