WO2014199214A2 - Dispositif d'embrayage - Google Patents

Dispositif d'embrayage Download PDF

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Publication number
WO2014199214A2
WO2014199214A2 PCT/IB2014/001014 IB2014001014W WO2014199214A2 WO 2014199214 A2 WO2014199214 A2 WO 2014199214A2 IB 2014001014 W IB2014001014 W IB 2014001014W WO 2014199214 A2 WO2014199214 A2 WO 2014199214A2
Authority
WO
WIPO (PCT)
Prior art keywords
ball head
clutch
resin sheet
housing portion
head housing
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.)
Ceased
Application number
PCT/IB2014/001014
Other languages
English (en)
Other versions
WO2014199214A8 (fr
WO2014199214A3 (fr
Inventor
Akihiro Fujii
Yukio Matsuno
Tsuyoshi Oyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of WO2014199214A2 publication Critical patent/WO2014199214A2/fr
Publication of WO2014199214A8 publication Critical patent/WO2014199214A8/fr
Publication of WO2014199214A3 publication Critical patent/WO2014199214A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
    • 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
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
    • F16D2023/141—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings characterised by using a fork; Details of forks
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/10—Surface characteristics; Details related to material surfaces

Definitions

  • the invention relates to a clutch device that establishes and interrupts a power transmission path of a vehicle. More particularly, the invention relates to the structure of a rotating portion of a clutch release fork.
  • a clutch device that is provided with a support on which a ball head is provided, and a clutch release fork on which a ball head housing portion that houses the ball head portion is provided, and in which a friction clutch is engaged and disengaged by the clutch release fork being rotated with the ball head portion as the fulcrum, is well known.
  • the clutch device described in Japanese . Patent Application Publication No. 2009-30759 JP 2009-30759 A is just such a clutch device.
  • JP 2009-30759 A describes a grease reservoir, an oil passage that extends from this grease reservoir to an abutting portion of the clutch release fork and the ball head, and a ball that abuts with the clutch release fork and is housed in a large diameter portion that extends to the grease reservoir.
  • JP 2009-30759 A describes technology in which the clutch release fork is able to rotate smoothly by having the grease reservoir, the oil passage, and the ball provided in a support, and supplying lubricating oil to the abutting portion.
  • sliding i.e., relative sliding
  • sliding may occur between either when the clutch release fork rotates. If this happens, sliding, which is advantageous for the durability of the resin sheet, may not occur between the resin sheet and one of the support or the clutch release fork. This kind of problem is not yet well known.
  • the invention provides a clutch device which, when a film lubricant is provided between a support and a clutch release fork, is able to inhibit relative sliding between the film lubricant and the clutch release fork when the clutch release fork rotates.
  • a first aspect of the invention relates to a clutch device that includes a support on which a ball head portion is provided; a ball head housing portion within which the ball head portion is housed; a film lubrication provided between the ball head portion and the ball head housing portion, an inner peripheral surface of the ball head housing portion abutting against the ball head portion via the film lubricant, the inner peripheral surface of the ball head housing portion having a recess; and a clutch release fork that is provided with the ball head housing portion, the clutch release fork being configured to rotate with the ball head portion as a fulcrum.
  • a portion of the surface on the ball head housing portion side, of the film lubricant that is pressed against by the ball head portion and the ball head housing portion deforms so as to enter the recess on the inner peripheral surfaceof the ball head housing portion. Therefore, when the clutch release fork rotates with the ball head portion as the fulcrum, the protruding portion that is in the recess becomes resistance that impedes sliding between the film lubricant and the ball head housing portion. Thus, when the clutch release fork rotates, relative sliding between the film lubricant and the clutch release fork (especially the ball head housing portion) is able to be inhibited. As a result, sliding occurs between the film lubricant and the ball head portion when the clutch release fork rotates.
  • a portion of the inner peripheral surface of the ball head housing portion other than the recess may have a hemisphere shape that matches a hemisphere shape of the ball head portion.
  • the recess is appropriately provided in the inner peripheral surface of the ball head housing portion that abuts against the ball head portion via the film lubricant.
  • the clutch device may also include a retaining member configured to retain the film lubricant, and the support may be fit into the retaining member such that sliding occurs between the film lubricant and the ball head portion.
  • the film lubricant is able to be held in the proper position by a simple structure. That is, relative sliding between the film lubricant and the ball head housing portion is inhibited by the recess. Therefore, machining or parts for fixing the retaining member to the clutch release fork so that the film lubricant will not be able to slide relative to the clutch release fork is not necessary.
  • the retaining member is able to seal between the film lubricant and the ball head portion, so foreign matter will not be able to get in between the film lubricant and the ball head portion, and grease or the like is kept between the film lubricant and the ball head portion. As a result, sliding is able to more appropriate occur between the film lubricant and the ball head portion when the clutch release fork rotates.
  • the film lubricant may be a plastic deformable resin sheet, and the film lubricant may have a hemisphere shape that matches a hemisphere shape of the ball head portion.
  • a portion of the surface of the film lubricant on the ball head housing portion side plastic deforms so as to enter the recessy-so-relative sliding between the film lubricant and the ball head housing portion when the clutch release fork rotates is appropriately inhibited.
  • sliding between the film lubricant and the ball head portion is able to appropriately occur when the clutch release fork rotates.
  • the hemisphere shape of the portion of the inner peripheral surface of the ball head housing portion other than the recess may be provided having multiple stages.
  • the recess may have a hemisphere shape, and a radius of the recess may be smaller than a radius of the hemisphere shape of the ball head portion.
  • an axial center of a hemisphere shape of the recess may be the same as an axial center of a hemisphere shape of the ball head portion.
  • FIG. 1 is a sectional view schematically showing the structure of a clutch device to which the invention is applied;
  • FIG. 2 is a partial enlarged view of the clutch device in FIG. 1 ;
  • FIG. 3 is a view showing a frame format of a resin sheet when it deforms.
  • FIG. 4 is a reference drawing illustrating one example of a clutch release fork to which the invention is not applied.
  • FIG. 1 is a partial sectional view schematically showing the structure of a clutch device 10 for a vehicle to which the invention is applied.
  • the clutch device 10 is provided in a power transmission path between an engine (not shown) and a transmission (also not shown) of the vehicle.
  • the clutch device 10 includes a friction clutch 12, a support 14, a clutch release fork 16, a well-known release bearing 18, and a well-known release cylinder 20.
  • FIG. 1 is not an overall view of the clutch device 10, but rather shows mainly half of the clutch device 10 on a side where the clutch release fork 16 and the like is arranged, with respect to an axial center C.
  • the friction clutch 12 is a dry-operating single disc clutch that connects and disconnects a power transmission path between the engine and the transmission.
  • the friction clutch 12 functions as a friction coupling that transmits power by friction.
  • the friction clutch 12 is provided in a cylindrical clutch housing 22 that is integrally connected to both the engine and a housing (not shown) of the transmission.
  • the friction clutch 12 is provided between a disk-shaped flywheel 24 that is fixed to a crankshaft of the engine, and a clutch shaft 26 that is concentrically and relatively rotatably provided with respect to the flywheel 24, within the clutch housing 22.
  • the clutch shaft 26 passes through a partition wall 28 between the transmission and the friction clutch 12.
  • the clutch shaft 26 is also an input shaft for the transmission, which is rotatably supported by the partition wall 28.
  • the friction clutch 12 is provided inside of a clutch cover 30 that is fixed to an outer peripheral portion of the flywheel 24.
  • the friction clutch 12. includes a disk-shaped clutch disc 32 that is spline-engaged with a tip. end portion of the clutch shaft 26, an annular plate-shaped pressure plate 34 that is arranged on the opposite side of the clutch disc 32 from the flywheel 24, and an annular plate-shaped diaphragm spring 36 that is arranged on the opposite side of the pressure plate 34 from the clutch disc 32.
  • the clutch disc 32 includes an annular plate-shaped disc plate 38 that opposes both the flywheel 24 and the pressure plate 34.
  • the clutch disc 32 includes annular plate-shaped friction elements (a facing and a lining) 40, 42 that are fixed one to each side surface of the disc plate 38.
  • the pressure plate 34 is arranged so as to be able to be moved closer to and away from the clutch disc 32.
  • the diaphragm spring 36 is attached to the clutch cover 30 via a pair of annular pivot rings 44.
  • the diaphragm spring 36 urges the pressure plate 34 toward the clutch disc 32 at an outer peripheral edge portion of the diaphragm spring 36, with the pivot rings 44 as the fulcrum.
  • the diaphragm spring 36 is such that when the center portion (an inner peripheral end portion) of the diaphragm spring 36 is pressed toward the clutch disc 32 side in a direction parallel to the axial center C, the outer peripheral edge portion of the diaphragm spring 36 bends backward away from the pressure plate 34, with the pivot rings 44 as the fulcrum. Then when the pressure on the center portion of the diaphragm spring 36 is released, the outer peripheral edge portion of the diaphragm spring 36 returns to the state in which it urges the pressure plate 34 toward the clutch disc 32.
  • the support 14 has a bolt portion 14b provided on one end of a circular cylindrical main body portion 14a.
  • the support 14 has a hemisphere-shaped ball head portion 14c provided on the other end of the circular cylindrical main body portion 14a.
  • the support 14 is attached to the partition wall 28 by being screwed into the partition wall 28.
  • the support 14 structured in this way functions as a fulcrum when the clutch release fork 16 rotates.
  • the clutch release fork 16 has a ball head housing portion 16a that houses the ball head portion 14c, formed near the center of the main body of the clutch release fork 16.
  • the ball head housing portion 16a has a hemisphere shape that matches the hemisphere shape of the ball head portion 14c.
  • the clutch release fork 16 is rotated with the ball head portion 14c as the fulcrum, in response to operation of the release cylinder 20, as shown by arrow A in FIG. 2.
  • FIG. 2 is a partial enlarged view of the clutch device 10 in which the area near the ball head housing portion 16a in FIG. 1 has been enlarged.
  • the release bearing 18 is attached by being press-fit into the bearing collar 46.
  • the bearing collar 46 is provided so as to be non-rotatable around the axial center C and able to move in a direction parallel to the axial center C.
  • the clutch device 10 further includes a resin sheet 48 that is a film lubricant sandwiched between the ball head portion 14c and the ball head housing portion 16a.
  • the resin sheet 48 is provided so that the clutch release fork 16 will rotate smoothly.
  • the resin sheet 48 is a plastic deformable resin sheet.
  • the resin sheet 48 is molded in a hemisphere shape matching the hemisphere shape of the ball head portion 14c. This resin sheet 48 may be made entirely of resin, for example.
  • This resin sheet 48 may be made of metal mesh that is coated with a resin coating, for example.
  • the clutch device 10 also includes a retaining member 50 that retains the resin sheet 48.
  • the retaining member 50 is a rubber bellows-type member, for example.
  • the retaining member 50 has a retaining portion 50b that retains an outer peripheral portion of the resin sheet 48, formed on one end of a main body portion 50a.
  • An inner peripheral surface of the main body portion 50a has a cylindrical shape that matches the shape of the main body portion 14a of the support 14, so as to closely contact the circular cylindrical main body portion 14a when the support 14 is fit into the retaining member 50 from the other end of the main body portion 50a.
  • the retaining member 50 has a seal function.
  • a spring 52 such as an O-ring may be provided, for example.
  • the retaining member 50 is configured to allow sliding between the resin sheet 48 and the ball head portion 14c, with the support 14 inserted.
  • the internal space is filled with grease, for example, to facilitate sliding between the resin sheet 48 and the ball head portion 14c.
  • the grease is prevented from flowing out into the external space, and foreign matter is prevented from getting into the internal space from the external space, by the seal function of the retaining member 50 described above. Therefore, a decrease in the durability of the resin sheet 48 due to sliding between the resin sheet 48 and the ball head portion 14c is inhibited.
  • FIG. 4 is a reference drawing illustrating one example of a clutch release fork 16 to which the structure of the recess 16al is not applied.
  • the clutch release fork 16 is rotated with the ball head portion 14c as the fulcrum, just as shown in. FIG. 2.
  • the clutch device 10 of this example embodiment has the recess 16al formed in the inner peripheral surface of the ball head housing portion 16a. More specifically, as shown in FIGS. 1 and 2, with the ball head housing portion 16a, the recess 16al is formed in the inner peripheral surface of the ball head housing portion 16a by a large diameter hemisphere overlapping with a small diameter hemisphere on the same axial center, such that a multistage (two stages in this example embodiment) hemisphere shape is formed.
  • FIG. 3 is a view showing a frame format of the resin sheet 48 when it deforms.
  • the ball head portion 14c operates as a fulcrum. Accordingly, pressing force is generated between the ball head portion 14c and the ball head housing portion 16a.
  • the resin sheet 48 that is sandwiched between the ball head portion 14c and the ball head housing portion 16a maintains a hemisphere shape at the surface on the ball head portion 14c side. Meanwhile, at the surface on the ball head housing portion 16a side, the resin sheet 48 plastically ' deforms and consequently assumes a shape that protrudes following the shape of the recess 16al formed in the ball head housing portion 16a.
  • this protruding portion acts as a slide inhibitor, so the resin sheet 48 and the clutch release fork 16 operate as a single unit when the clutch release fork 16 rotates.
  • this protruding portion acts as a slide inhibitor, so the resin sheet 48 and the clutch release fork 16 operate as a single unit when the clutch release fork 16 rotates.
  • the recess 16al is formed in the inner peripheral surface of the ball head housing portion 16a that abuts against the ball head portion 14c via the resin sheet 48. Consequently, a portion of the surface on the ball head housing portion 16a side, of the resin sheet 48 that is pressed against by the ball head portion 14c and the ball head housing portion 16a deforms so as to enter the recess 16al . Therefore, when the clutch release fork 16 rotates, the protruding portion that is in the recess 16al becomes resistance that impedes sliding between the resin sheet 48 and the ball head housing portion 16a.
  • the hemisphere shape of the ball head housing portion 16a that matches the hemisphere shape of the ball head portion 14c is provided having multiple stages (a portion of the inner peripheral surface of the ball head housing portion 16a other than the recess 16al has the hemisphere shape that matches the hemisphere shape of the ball head portion 14c, and a hemisphere of the portion of the inner peripheral surface of the ball head housing portion 16a other than the recess 16al is provided having multiple stages).
  • the recess 16al is appropriately formed in the inner peripheral surface of the ball head housing portion 16a.
  • the support 14 is fit into the retaining member 50 in a manner such that sliding is possible between the resin sheet 48 and the ball head portion 14c. Therefore, the resin sheet 48 is able to be held in a proper position by a simple structure. Accordingly, machining or parts for fixing the retaining member 50 to the clutch release fork 16 so that the resin sheet 48 will not be able to slide relative to the clutch release fork 16 is not necessary. Also, the retaining member 50 is able to seal between the resin sheet 48 and the ball head portion 14c, so foreign matter will not get in between the resin sheet 48 and the ball head portion 14c, and grease or the like is kept between the resin sheet 48 and the ball head portion 14c. As a result, sliding is able to more appropriate occur between the resin sheet 48 and the ball head portion 14c when the clutch release fork 16 rotates.
  • the resin sheet 48 is a plastic deformable sheet, and is molded in a hemisphere shape matching the hemisphere shape of the ball head portion 14c. . Accordingly, a portion of the surface of the resin sheet 48 on the ball head housing portion 16a side plastically deforms so as to enter the recess 16al . As a result, relative sliding between the resin sheet 48 and the ball head housing portion 16a when the clutch release fork 16 rotates is appropriately inhibited. Also, sliding between the resin sheet 48 and the ball head portion 14c appropriately occurs when the clutch release fork 16 rotates.
  • the recess 16al is formed in the inner peripheral surface of the ball head housing portion 16a by the top portion of the ball head housing portion 16a being formed in a multistage hemisphere shape.
  • a recess may also be formed in the inner peripheral surface without a protrusion being formed on an outer peripheral surface of the ball head housing portion 16a.
  • a recess may be formed in a portion offset from the top portion.
  • a plurality of recesses, not just one, may be formed.
  • small asperities may also be formed.
  • the friction clutch 12 is a diaphragm spring type clutch
  • the actuator that operates the clutch release fork 16 is the release cylinder 20 that is a hydraulic actuator.
  • the friction clutch may also be a coil spring type clutch
  • the actuator may be another type of actuator such as an electric actuator.
  • the actuator may operate the clutch release fork 16 by an operation by a driver being transmitted via only a mechanical connection.
  • the invention may be applied as long as the clutch device is one in which the clutch release fork 16 having the ball head housing portion 16a rotates with the ball head portion 14c formed on the support 14 as the fulcrum.
  • the clutch device includes a dry-operating single disc friction clutch, and has a function in which it operates this friction clutch.
  • the clutch device may be a manual type clutch device that switches the operating state of the friction clutch in conjunction with a clutch pedal operated by a driver, for example.
  • the clutch device may also be an automatic type clutch device that switches the operating state of the friction clutch according to a shift or a running state or the like, for example.
  • the friction clutch forms part of a power transmission path from a driving force source to a driving wheel of a vehicle, and connects or interrupts the power transmission path between the driving force source and the transmission.
  • the driving force source may preferably be an internal combustion engine such as a gasoline engine or a diesel engine. Alternatively, an electric motor may be used either alone or in addition to an engine, as the driving force source.
  • the transmission is a well-known constant mesh parallel shaft transmission, and may be either a manual transmission or an automatic transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

Selon la présente invention, un évidement est formé dans une surface périphérique interne d'une partie de réception d'embout sphérique qui vient en butée contre une partie embout sphérique par l'intermédiaire d'une feuille de résine. Par conséquent, une partie d'une surface côté partie de réception d'embout sphérique de la feuille de résine qui est comprimée par la partie d'embout sphérique et la partie de réception d'embout sphérique se déforme de sorte à entrer dans l'évidement. Par conséquent, lorsque la fourchette de débrayage tourne, une partie saillante qui se trouve dans l'évidement offre une résistance qui gêne le coulissement entre la feuille de résine et la partie de réception d'embout sphérique. Ainsi, lorsque la fourchette de débrayage tourne, le coulissement relatif entre la feuille de résine et la partie de réception d'embout sphérique peut être empêché.
PCT/IB2014/001014 2013-06-14 2014-06-11 Dispositif d'embrayage Ceased WO2014199214A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-126156 2013-06-14
JP2013126156A JP2015001268A (ja) 2013-06-14 2013-06-14 クラッチ装置

Publications (3)

Publication Number Publication Date
WO2014199214A2 true WO2014199214A2 (fr) 2014-12-18
WO2014199214A8 WO2014199214A8 (fr) 2015-02-19
WO2014199214A3 WO2014199214A3 (fr) 2015-05-07

Family

ID=51211805

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/001014 Ceased WO2014199214A2 (fr) 2013-06-14 2014-06-11 Dispositif d'embrayage

Country Status (2)

Country Link
JP (1) JP2015001268A (fr)
WO (1) WO2014199214A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11333201B2 (en) * 2018-08-31 2022-05-17 Toyota Jidosha Kabushiki Kaisha Greasing device for clutch release mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009030759A (ja) 2007-07-30 2009-02-12 Toyota Motor Corp クラッチレリーズフォークの潤滑構造

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2722262B1 (fr) * 1994-07-07 1996-08-23 Renault Dispositif de commande d'embrayage
US6123181A (en) * 1998-07-28 2000-09-26 Mannesmann Sachs Ag Articulation head for a clutch-release rocker arm of a friction clutch
FR2791100B1 (fr) * 1999-03-17 2001-04-13 Peugeot Articulation rotulante et l'application d'une telle articulation pour une commande d'embrayage
FR2859772B1 (fr) * 2003-09-11 2005-11-11 Plastic Omnium Cie Ensemble pour systeme de debrayage de vehicule automobile

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009030759A (ja) 2007-07-30 2009-02-12 Toyota Motor Corp クラッチレリーズフォークの潤滑構造

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11333201B2 (en) * 2018-08-31 2022-05-17 Toyota Jidosha Kabushiki Kaisha Greasing device for clutch release mechanism
US12203506B2 (en) 2018-08-31 2025-01-21 Toyota Jidosha Kabushiki Kaisha Greasing device and greasing method

Also Published As

Publication number Publication date
JP2015001268A (ja) 2015-01-05
WO2014199214A8 (fr) 2015-02-19
WO2014199214A3 (fr) 2015-05-07

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