WO2009020564A1 - Synchroniseur segmenté hydraulique pour mettre en prise et libérer une sélection de vitesse pour dct - Google Patents

Synchroniseur segmenté hydraulique pour mettre en prise et libérer une sélection de vitesse pour dct Download PDF

Info

Publication number
WO2009020564A1
WO2009020564A1 PCT/US2008/009323 US2008009323W WO2009020564A1 WO 2009020564 A1 WO2009020564 A1 WO 2009020564A1 US 2008009323 W US2008009323 W US 2008009323W WO 2009020564 A1 WO2009020564 A1 WO 2009020564A1
Authority
WO
WIPO (PCT)
Prior art keywords
cone
post
engagement surface
engagement
clutch arrangement
Prior art date
Application number
PCT/US2008/009323
Other languages
English (en)
Other versions
WO2009020564A9 (fr
Inventor
Thomas E. Braford, Jr.
Original Assignee
Borgwarner Inc.
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 Borgwarner Inc. filed Critical Borgwarner Inc.
Publication of WO2009020564A1 publication Critical patent/WO2009020564A1/fr
Publication of WO2009020564A9 publication Critical patent/WO2009020564A9/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
    • F16D1/091—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces and comprising a chamber including a tapered piston moved axially by fluid pressure to effect clamping
    • 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
    • F16D2023/0693—Clutches with hydraulic actuation

Definitions

  • the present invention relates to clutches for engaging a co-axially mounted gear on a rotating shaft.
  • the present invention is particularly useful in dual clutch transmissions.
  • the clutch includes a post mounted shaft providing a fluid boundary, the post having a fluid delivery passage in fluid communication with a passage in the shaft.
  • An apply piston is provided slideably forming a sealed control volume with the post wherein the control volume is exposed to the post fluid delivery passage, the apply piston having a conical engagement surface.
  • a circumferentially segmented cone is provided. The cone has a first engagement surface for engagement with the apply piston conical engagement surface and a second engagement surface for engagement with the gear.
  • Figure 1 is a sectional view of a preferred embodiment clutch arrangement according to the present invention
  • Figure 2 is a sectional view taken along a different angle from that shown in Figure 1 ;
  • Figure 3 is still another sectional view taken from a different angle from that of Figures 1 and 2;
  • FIG 4 is an exploded view of the clutch shown in Figures 1 , 2 and 3;
  • Figure 5 is a sectional view similar to that of Figure 1 of an alternate preferred embodiment clutch arrangement according to the present invention.
  • Figure 6 is a sectional view of another alternate preferred embodiment of the present invention.
  • Figure 7 is a partial sectioned perspective view of the clutch shown in Figure 6 with portions removed for clarity of illustration;
  • Figure 8A is a perspective view of a cone segment of the clutch of
  • Figure 8B is a front view of a cone segment of the clutch of Figures 6 and 7;
  • Figure 8C is a top view of a cone segment of the clutch of Figures 6 and 7;
  • Figure 8D is a rear view of a cone segment of the clutch of Figures 6 and 7;
  • Figure 9 is a perspective view of a cone segment of the clutch of Figures 6 and 7; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • a fluid or hydraulic actuated clutch arrangement 7 of the current invention has a rotational shaft 10 with rotates about axis 12.
  • the shaft has rotatably therein a first co-axially mounted gear 14 and a second co-axially mounted gear 16.
  • the shaft 10 and gears 14 and 16 are typically part of a vehicle transmission particularly a dual clutch transmission identical or similar to those described in U.S. Patents 6,715,597, 6,832,978, 6,953,417 and 7,155,993.
  • the gears 14 and 16 are rotatably mounted upon the shaft 10 by needle bearings (not shown).
  • the gears 14 and 16 freely rotate upon the shaft 10.
  • a post 18 Splined to the shaft 10 is a post 18.
  • the post 18 has a lower body 20. Extending radially outward from the lower body 20 is a series of circumferentially spaced tabs 22. Above the tabs 22 is an upper rim 24.
  • the upper rim 24 has a sealing groove 26. Seated within the sealing groove 26 is an annular sealing member 28. Above the rim 24 there is a post extension 30. From the post extension 30, the post extends outward into a top T member 32. Between the sealing member 26 and the extension 30 is a supply passage 34.
  • the supply passage 34 intersects with a radial extension 36 and an axial passage 38 provided in the shaft 10.
  • the post 18 provides a fluid boundary.
  • the apply piston 40 Slidably mounted on the post 10 between the T 32 and the rim 24 is an apply piston 40.
  • the apply piston is sealed by the sealing member 28 and also has its own sealing groove 42 which mounts an annular sealing member 44.
  • the sealing piston 40 is biased to a non-actuated position by a plate spring 46 that is held in position by a snap ring 48.
  • the sealing members 28 and 44 cooperate to form between the apply piston 40 and the post 18 a control volume 49 which is exposed to the passage 34.
  • the arrangement 7 also has a cone 50.
  • the cone 50 is preferably segmented into 3 or more geometrically divided segments (as shown 4).
  • the cone is "C" shaped in an axial cross-section having a first engagement surface 52 and a second engagement surface 54 on its opposite sides.
  • the first engagement surface 52 has non-self locking engagement with engagement surface 58 of the piston. Both engagement surfaces 52 and 58 are non-parallel with the axis 12 of the shaft. The angle of engagement of the first engagement surface 52 and the piston engagement surface is non-self engaging typically in a general range of 6° to 8°.
  • the engagement surfaces 52 are formed on circumferentially spaced tabs 60 of the cone. The tabs 60 are circumferentially intermixed with tabs 22 of the post for torsional transference there between.
  • the second engagement surface 54 can be provided by a friction lining connected with the cone 50.
  • the second engagement surface 52 has self-locking engagement with an engagement surface 62 of the gear 14.
  • the engagement surfaces 52 and 62 will both be non-parallel with the shaft rotational axis 12.
  • the cone 50 engagement with the gear 14 is in the range of a 2° to 3° engagement angle. The cone 50 can be easily released from engagement with the gear 14 since it is segmented.
  • pressurized hydraulic fluid from the transmission is delivered to a radial fluid line 70 that passes between annular sealing members 72.
  • the fluid line 70 connects with the axial path 38.
  • the pressurized fluid enters the generally radial extension 36 into the supply passage 34 wherein it pressurizes a control volume that is bordered by the apply piston 40 and the post 18.
  • the apply piston 40 is slid outwardly causing its engagement surface 58 to engage the cone engagement surface 52.
  • the above noted action will be great enough to overcome the biasing of plate spring 46 and thereafter the cone 50 will be forced radially outward from the post 18 causing its second engagement surface 54 to engage with the gear engagement surface 62.
  • an embodiment 117 of the present invention illustrates a fluid or hydraulically actuated clutch arrangement wherein the cones second engagement surface 154 is radially outward from the cone 150 first engagement surface 152.
  • the gear 114 has an extension 115 to provide the engagement surface for the gear.
  • the gear 116 has an extension 119 to provide on its inner radial side an engagement surface.
  • the clutch 117 works in a manner generally similar to that described having a piston 140 which is bias to a retracted position by a spring 146. Pressurization of a control volume between the piston 140 and the post 118 causes the engagement surface of the piston 158 to engage the first engagement surface 152 of the cone 150 in a non-self locking fashion.
  • the cone 150 is segmented preferably into three or more segments.
  • a clutch arrangement 217 which in function is similar or almost identical to that previously described for clutch arrangement 117.
  • Clutch 217 has gears 216 and 214.
  • Clutch arrangement 217 has a post 218 and apply piston 240.
  • the post 218 has T members 232 having a central slot or groove 219.
  • the top of the T members have a circumferential groove 223.
  • Fixably pressed onto the grooves 223 are two annular rod members 225.
  • the rod members 225 provide a pivotal fulcrum for the cone segments 250.
  • the cone segments 250 have tabs 259 which are intermixed between the post's T members 232.
  • the cones 250 have on their tab members 259 a circumferential groove 263 that is fitted underneath the rods 225. Inserted within the groove 219 of the post T members 232 is a radially outwardly expanding spring 221 which engages with a radial underside 267 of the cone's tab to directly bias the cones to pivot against the rods 225 to prevent drag and inadvertent engagement of the cone second friction surface 254 with the gear friction surfaces provided by the underside of extensions 219 or 215 of the gears.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

L'invention concerne un embrayage actionné par fluide prévu pour relier un engrenage monté coaxialement sur un arbre rotatif. L'agencement d'embrayage comprend un montant monté sur l'arbre fournissant une limite de fluide. Le montant a un passage de fourniture de fluide en communication fluidique avec un passage situé dans l'arbre. Un piston appliqué est fourni qui est monté de manière coulissante sur l'arbre et qui forme un volume de commande étanchéifié avec le montant. Le volume de commande est exposé au passage de fourniture de fluide de montant. Le piston d'application a une surface de contact conique. Un cône segmenté circonférentiellement est aussi fourni. Le cône a une première surface de contact destinée à venir en contact avec la surface de contact conique et du piston d'application. Le montant a une seconde surface de contact pour venir en contact avec l'engrenage.
PCT/US2008/009323 2007-08-07 2008-08-01 Synchroniseur segmenté hydraulique pour mettre en prise et libérer une sélection de vitesse pour dct WO2009020564A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96370507P 2007-08-07 2007-08-07
US60/963,705 2007-08-07

Publications (2)

Publication Number Publication Date
WO2009020564A1 true WO2009020564A1 (fr) 2009-02-12
WO2009020564A9 WO2009020564A9 (fr) 2009-06-25

Family

ID=40341576

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/009323 WO2009020564A1 (fr) 2007-08-07 2008-08-01 Synchroniseur segmenté hydraulique pour mettre en prise et libérer une sélection de vitesse pour dct

Country Status (1)

Country Link
WO (1) WO2009020564A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161423A (en) * 1990-12-24 1992-11-10 Eaton Corporation Self-energizing synchronizer for equalizing shift time and effort of a multi-ratio transmission
JPH10103377A (ja) * 1996-09-16 1998-04-21 Eaton Corp ピン型同期装置
JPH10122361A (ja) * 1996-05-23 1998-05-15 Eaton Corp 変速機シフト装置およびそのジョークラッチ
JP2002213488A (ja) * 2000-12-26 2002-07-31 Eaton Corp 自己増力式同期装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161423A (en) * 1990-12-24 1992-11-10 Eaton Corporation Self-energizing synchronizer for equalizing shift time and effort of a multi-ratio transmission
JPH10122361A (ja) * 1996-05-23 1998-05-15 Eaton Corp 変速機シフト装置およびそのジョークラッチ
JPH10103377A (ja) * 1996-09-16 1998-04-21 Eaton Corp ピン型同期装置
JP2002213488A (ja) * 2000-12-26 2002-07-31 Eaton Corp 自己増力式同期装置

Also Published As

Publication number Publication date
WO2009020564A9 (fr) 2009-06-25

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