WO2019141562A1 - Ensemble embrayage à disque - Google Patents

Ensemble embrayage à disque Download PDF

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Publication number
WO2019141562A1
WO2019141562A1 PCT/EP2019/050432 EP2019050432W WO2019141562A1 WO 2019141562 A1 WO2019141562 A1 WO 2019141562A1 EP 2019050432 W EP2019050432 W EP 2019050432W WO 2019141562 A1 WO2019141562 A1 WO 2019141562A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
disk clutch
disk
serration
clutch assembly
Prior art date
Application number
PCT/EP2019/050432
Other languages
English (en)
Inventor
Cristian SACCUMAN
Original Assignee
Zf Friedrichshafen Ag
ZF PADOVA Srl.
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 Zf Friedrichshafen Ag, ZF PADOVA Srl. filed Critical Zf Friedrichshafen Ag
Publication of WO2019141562A1 publication Critical patent/WO2019141562A1/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
    • F16D13/00—Friction clutches
    • F16D13/22—Friction clutches with axially-movable clutching members
    • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
    • F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
    • 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
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/14—Clutches in which the members have interengaging parts with clutching members movable only axially
    • 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
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/70—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/30—Transmitting power from propulsion power plant to propulsive elements characterised by use of clutches
    • 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
    • F16D25/00—Fluid-actuated clutches
    • F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
    • F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
    • F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
    • F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
    • F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
    • 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
    • F16D47/00—Systems of clutches, or clutches and couplings, comprising devices of types grouped under at least two of the preceding guide headings

Definitions

  • the present invention relates to a disk clutch assembly for a marine propulsion device with a powered actuator for normal operation of the clutch and with emergency actuating means for manual operation of the clutch in case of an actuator failure.
  • Powered actuators can be pneumatic, hydraulic or electric actuators.
  • Some of the conventional power actuated clutches are equipped with emergency actuating means to enable manual operation in case of a failure of the powered actuator.
  • Such emergency actuating means in marine propulsion devices are also called“bring home” device or“limb home” device.
  • the emergency actuating means of friction plate clutches in conventional marine propulsion devices are difficult to handle in an emergency situation.
  • Such shiftable disk clutches are often located inside a gearbox housing and the emergency actuating means have to be operated through a housing window with a tool. That makes the handling even more difficult, as the input shaft of the gearbox, which is connected to the engine, has to be turned. This requires an auxiliary electric motor in some cases.
  • the aim of the present invention is to avoid the disadvantages of prior art and to provide a disk clutch assembly for a marine propulsion device with a powered actuator and with emergency actuating means which is easy to handle and which has a simple construction.
  • the invention provides a disk clutch assembly for a marine propulsion device.
  • the disk clutch assembly comprises a disk clutch, a powered actuator to engage and dis- engage the disk clutch during normal operation and emergency actuating means to manually engage the disk clutch in case of a failure of the powered actuator.
  • the emergency actuating means comprise a first serration and a second serration, which can be positively locked with each other in order to close the disk clutch.
  • the first serration is arranged rotationally and axially fix to a first shaft of the disk clutch assembly, while the second serration is arranged rotationally fix and axially movable to a second shaft of the disk clutch assembly.
  • the first and the second serration can be manually connected with each other to achieve a positive connection between the first and the second shaft. This way the power train of a marine propulsion device is able to reliably transmit the torque of an engine to the propeller shaft and the vessel can be driven home or to a dockyard to repair the faulty powered actuator.
  • the second serration is part of an engaging ring which may be fastened to the second shaft selectively in one of two positions, namely a normal operation position and an emergency position.
  • the engaging ring with its second serration may be fastened spaced apart from the first serration in the normal operation position or positively locked to the first serration in the emergency position.
  • the disk clutch In the normal operating position the disk clutch can be opened and closed by the powered actuator as desired.
  • the first and the second serration are positively locked to each other and the disk clutch is engaged.
  • the second serration may be arranged on the end face of the engaging ring which is facing towards the first serration.
  • the second serration may be an external toothing which fits to a first serration in form of an internal toothing at the first shaft.
  • the engaging ring and the serration can have different forms and measures. They just need to be strong enough to reliably transmit the drive power of the corresponding engine to drive a vessel home, if the powered actuator or the friction clutch fails.
  • This solution enables the manual operation of the disk clutch by moving only one element, namely the engaging ring. Compared to the conventional solution with several threaded bolts this makes the handling of the disk clutch in case of an emergency simpler and faster. With such a disk clutch assembly it is no more necessary to rotate the disk clutch and parts of the power train in order to gain access to the required emergency actuating means. If the disk clutch is located inside a gearbox housing, the engaging ring can easily be accessed via a housing window in any rotational position of the power train.
  • the clutch disk assembly may further comprise at least one snap ring to fasten the engaging ring to the second shaft in the normal operating position and/or in the emergency position.
  • the snap rings hold the engaging ring in the normal operating position, so that the first and second serration are positioned at a distance to each other.
  • One of the snap rings can also be used to hold the engaging ring in the emergency position after moving it to this position.
  • a snap ring can be any type of lock ring or retaining ring, for example a circlip or a Seeger ring. However, in view of an easy handling in an emergency case it is preferred to use snap rings which can easily be unlocked and locked.
  • the clutch disk assembly comprises at least one locking screw and a spring-biased element which moves the engaging ring from the normal operating position to the emergency position, when the locking screw has been removed.
  • a cup spring is particularly suitable as spring-biased element.
  • the first serration may be arranged at a blocking ring which is fastened to the first shaft.
  • the primary function of the blocking ring is to block the axial movement of disks of the disk clutch.
  • the blocking ring holds the disks on the corresponding disk carrier of the first shaft and limits the axial movement of the disks in the axial direction when they are pushed in this direction by the powered actuator.
  • Such a blocking ring can be arranged in axial direction between the disks of the disk clutch and the engaging ring. Arranging the first serration at the blocking ring enables the blocking ring for its secondary function, namely to transmit the drive torque of the propulsion system in an emergency case. For this the blocking ring must be at least rotationally fixed to the first shaft.
  • the first and the second serration can have any form which allows the positive locking and the reliable transmission of the drive torque in an emergency case, i.e. if the powered actuator fails.
  • the first and second serrations together build a so-called Hirth-coupling.
  • Hirth-couplings have been used for many applications and proved their reliable function. They consist of radial teeth formed by grooves milled or ground into the end face of a cylindrical element.
  • the first shaft of the disk clutch assembly preferably comprises an outer disk carrier, while the second shaft comprises an inner disk carrier.
  • the inner disk carrier can be formed as a hollow shaft which is arranged coaxially to the first shaft, which extends through the hollow shaft.
  • the second shaft comprises a pinion to drive another gearwheel of the marine propulsion device, and if the second shaft, the inner disk carrier and said pinion are integrally formed as a one-piece element.
  • a marine propulsion device which comprises a disk clutch assembly as described above, wherein the first shaft is a driving shaft and the second shaft is a driven shaft.
  • the driven shaft can be directly connected to a propeller shaft of a marine vessel.
  • Fig. 1 shows a disk clutch assembly in a sectional view according to a first embodiment of the invention in a disengaged state of the disk clutch
  • Fig. 2 shows the disk clutch assembly of Fig. 1 in a sectional view in an engaged state of the disk clutch
  • Fig. 3 shows a drawing detail of a disk clutch assembly in a sectional view according to a second embodiment of the invention in a disengaged state of the disk clutch and
  • Fig. 4 shows the drawing detail of Fig. 3 with the disk clutch engaged.
  • Fig.1 shows a disk clutch assembly 1 wherein the disk clutch 2 is open.
  • the disk clutch 2 is arranged to selectively connect a first shaft 6 with a second shaft 7.
  • the first shaft 6 is supported by two rolling contact bearings 17, 18 in a gearbox housing 15.
  • the second shaft 7 is formed as a hollow shaft and supported on the first shaft 6 by needle bearings 19 and by axial bearings 20, 21. Both, the first shaft 6 and the second shaft 7 may rotate around a central rotation axis 22.
  • the axial and radial directions in this document refer to the central rotation axis 22 of the disk clutch.
  • the disk clutch 2 comprises an inner disk carrier 23 carrying several inner disks 14 and an outer disk carrier 24 carrying several outer disks 15.
  • the inner and outer disks 14, 15 are conventional friction discs.
  • the inner disks 14 are rotationally fixed to the inner disk carrier 23.
  • the outer disks 15 are rotationally fixed to the outer disk carrier 24.
  • the inner disks 14 and the outer disks 15 are movable in axial direction.
  • the inner disk carrier 23 is part of second shaft 7 and formed as a hollow shaft which is arranged coaxially to the first shaft 6.
  • First shaft 6 extends through the second shaft 7.
  • the second shaft 7 further comprises a pinion 25 to drive another gearwheel which is fixed to an output shaft of the corresponding gearbox.
  • the second shaft 7, the inner disk carrier 23 and pinion 25 are integrally formed as a one-piece element.
  • a powered actuator 3 in form of a hydraulic piston 26 is provided to engage the disk clutch 2 during normal operation.
  • piston 26 In the disengaged position piston 26 is pressed by a helical spring 27 to its retracted position away from friction disks 14, 15 of the disk clutch 2.
  • a cup spring 28 is arranged between piston 26 and the disks 14, 15 in order to enable smooth engaging by the piston 26.
  • harsh engagement of the disk clutch 2 is avoided when actuating pressure acts on piston 26.
  • the blocking ring 13 serves to block the clutch disks 14, 15 when they are pushed in this direction by piston 26 during normal operation. This way the outer disks 15 can be pressed against the inner disks 14 until the disk clutch 2 is engaged by frictional forces between the disks 14 and 15.
  • the blocking ring 13 is fastened to the outer disk carrier 24 of the first shaft 6 by a snap ring 29.
  • Emergency actuating means in form of a first serration 4, a second serration 5 and an engaging ring 8 are provided for cases, when the powered actuator 3 fails. This is for example, if no hydraulic pressure can be supplied by the hydraulic system.
  • the first serration 4 is arranged rotationally and axially fix to the first shaft 6 and the second serration 5 is arranged rotationally fix and axially movable to the second shaft 7.
  • the first serration 4 is part of, i.e. incorporated into blocking ring 13 which is fastened to the first shaft 6.
  • the second serration 5 is part of engaging ring 8 which is fastened to the second shaft 7. In the normal operation position the engaging ring 8 with the second serration 5 is positioned spaced apart from the blocking ring 13 with the first serration 4.
  • Two snap rings 9 and 10 are provided to fasten the engaging ring 8 to the second shaft 7 in the normal operating position. Each of the snap rings 9, 10 is axially fixed to the second shaft 7 in a peripheral groove of the second shaft 7.
  • Fig. 2 shows the same disk clutch assembly as Fig. 1 .
  • the same elements in Fig. 2 have the same reference signs as in Fig. 1 and their function will not be described once more.
  • Fig. 2 shows disk clutch 2 in its engaged position.
  • engaging ring 8 has been moved axially on the second shaft 7 to an emergency position, so that the first serration 4 and the second serration 5 are positively locked with each other.
  • the engaging ring 8 is axially fixed to the second shaft 7 by snap ring 9 thereby keeping the disk clutch assembly 1 engaged.
  • snap ring 9 extends at least partly into a peripheral groove on the inner side of engaging ring 8 in the emergency position.
  • the piston 26 of the powered actuator 3 stays in its retracted position in both Fig. 1 and Fig. 2.
  • Fig. 3 and Fig. 4 show details of a second embodiment of the disk clutch assembly 1 .
  • the disk clutch assemblies 1 of above described first embodiment and the second embodiment of Fig. 3 and Fig. 4 have a similar layout. That is why the same elements have the same reference sign in all figures.
  • Fig. 3 shows the disk clutch 2 in a disengaged state, wherein the locking screw 1 1 holds the engaging ring 8 in its normal operating position against the force of the cup spring 12 which serves a spring-biased element 12.
  • Fig. 4 shows the disk clutch 2 in an engaged state, wherein the locking screw 1 1 has been removed and the engaging ring 8 has been moved into the emergency position by cup spring 12.
  • Cup spring 12 is kept in its axial position on the second shaft 7 by another snap ring 30 which is positioned at least partly in a peripheral groove in the second shaft 7.
  • Cup spring 12 is designed to be able to hold engaging ring 8 in the emergency position, i.e. to keep the first serration 4 engaged with the second serration 5.

Landscapes

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

Abstract

L'invention concerne un ensemble embrayage à disque (1) pour un dispositif de propulsion marin. L'ensemble embrayage à disque (1) comprend un embrayage à disque (2), un actionneur motorisé (3) et des moyens d'actionnement d'urgence (4, 5, 8) permettant d'embrayer manuellement l'embrayage à disque (2) en cas de défaillance de l'actionneur motorisé (3). Les moyens d'actionnement d'urgence (4, 5, 8) comprennent une première dentelure (4) et une seconde dentelure correspondante (5), qui peuvent se verrouiller positivement afin de fermer l'embrayage à disque (2). La première dentelure (4) est disposée fixe en rotation et axialement par rapport à un premier arbre (6) de l'ensemble embrayage à disque (1), tandis que la seconde dentelure (5) est disposée fixe en rotation et mobile axialement par rapport à un second arbre (7) de l'ensemble embrayage à disque (1). L'invention comprend en outre un dispositif de propulsion marin doté d'un tel ensemble embrayage à disque (1).
PCT/EP2019/050432 2018-01-17 2019-01-09 Ensemble embrayage à disque WO2019141562A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018200709.8A DE102018200709B3 (de) 2018-01-17 2018-01-17 Scheibenkupplungsanordnung
DE102018200709.8 2018-01-17

Publications (1)

Publication Number Publication Date
WO2019141562A1 true WO2019141562A1 (fr) 2019-07-25

Family

ID=64745285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/050432 WO2019141562A1 (fr) 2018-01-17 2019-01-09 Ensemble embrayage à disque

Country Status (2)

Country Link
DE (1) DE102018200709B3 (fr)
WO (1) WO2019141562A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6042436A (en) 1997-06-30 2000-03-28 R E N K Aktiengesellschaft Shiftable disk clutch or disk brake
DE202010017461U1 (de) * 2010-11-18 2011-11-16 Stromag Ag Druckmittelbetätigte Kupplung
DE102014210846A1 (de) * 2014-06-06 2015-12-17 Zf Friedrichshafen Ag Reibscheibenkupplung
US9416827B1 (en) * 2010-06-23 2016-08-16 Logan Clutch Corporation Clutch assembly with dual actuation piston

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6042436A (en) 1997-06-30 2000-03-28 R E N K Aktiengesellschaft Shiftable disk clutch or disk brake
US9416827B1 (en) * 2010-06-23 2016-08-16 Logan Clutch Corporation Clutch assembly with dual actuation piston
DE202010017461U1 (de) * 2010-11-18 2011-11-16 Stromag Ag Druckmittelbetätigte Kupplung
DE102014210846A1 (de) * 2014-06-06 2015-12-17 Zf Friedrichshafen Ag Reibscheibenkupplung

Also Published As

Publication number Publication date
DE102018200709B3 (de) 2019-01-17

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