WO2012155877A1 - Système d'embrayage pour tracteurs à prise de force - Google Patents

Système d'embrayage pour tracteurs à prise de force Download PDF

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Publication number
WO2012155877A1
WO2012155877A1 PCT/DE2012/000443 DE2012000443W WO2012155877A1 WO 2012155877 A1 WO2012155877 A1 WO 2012155877A1 DE 2012000443 W DE2012000443 W DE 2012000443W WO 2012155877 A1 WO2012155877 A1 WO 2012155877A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch
coupling
pressure plate
drive
pressure
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/DE2012/000443
Other languages
German (de)
English (en)
Inventor
Matthias Vogt
Patrick Weydmann
Gerhard Gander
Alexander OBITZ
Vladimir MERK
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2012155877A1 publication Critical patent/WO2012155877A1/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
    • F16D21/00—Systems comprising a plurality of actuated clutches
    • F16D21/02—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways
    • F16D21/06—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways at least two driving shafts or two driven shafts being concentric
    • 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
    • F16D21/00—Systems comprising a plurality of actuated clutches
    • F16D21/02—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways
    • F16D21/06—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways at least two driving shafts or two driven shafts being concentric
    • F16D2021/0607—Double clutch with torque input plate in-between the two clutches, i.e. having a central input plate
    • 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
    • F16D2300/26—Cover or bell housings; Details or arrangements thereof

Definitions

  • the invention relates to a clutch assembly for use in the drive train of a tractor comprising a drive clutch and a PTO clutch, wherein the drive clutch between an engine and a transmission input shaft and the PTO clutch between the engine and a PTO are arranged.
  • the powertrain includes a main driveline and a sub-driveline.
  • the first is used to drive the vehicle, second to the drive of work machines, usually via a PTO.
  • a clutch is used for torque transmission between the engine and transmission in the main drivetrain, the other coupling torque transmission between the engine and PTO in the PTO.
  • the power take-off is also referred to as power take-off (PTO), according to which this power take-off associated clutch as PTO clutch or PTO clutch and arranged the main driveline clutch is referred to as a drive clutch.
  • Tractor double clutches known in the art include a cast housing as a clutch housing. Accordingly, the couplings are very heavy and the cast housing must be machined, as only so the required accuracy can be achieved. The machining is complex and expensive compared to sheet metal working.
  • a disadvantage of couplings according to the prior art is the relatively large casting mass and a comparatively low bursting speed. Another disadvantage is that extensive machining operations are necessary during production.
  • a coupling according to the prior art also includes many different items. Another disadvantage is that much of the assembly of the coupling must be done manually.
  • An object of the present invention is therefore to at least partially circumvent the aforementioned disadvantages.
  • a clutch assembly for use in the drive train of a tractor comprising a drive clutch and a PTO clutch, wherein the drive clutch between an internal combustion engine and a transmission input shaft and the PTO clutch between the engine and a PTO are arranged, wherein the clutch assembly comprises a clutch housing having a Sheet metal forming part includes.
  • the inventive solution has a significant weight advantage over prior art solutions. Another advantage is that it is easier to integrate a self-adjustment in the clutch assembly according to the invention.
  • the drive clutch and the auxiliary drive clutch each comprise an axially displaceable pressure plate and an axially fixed counter-pressure plate, between each of which a clutch disc can be clamped.
  • the pressure direction of both pressure plates of the individual clutches ie the drive clutch and the auxiliary drive clutch, have the same direction of action or pressure direction.
  • the counter-pressure plate of the drive clutch is not at the same time a coupling component of the auxiliary drive clutch.
  • the clutch housing is fixedly connected in one embodiment of the invention with a flywheel, wherein the flywheel counter-pressure plate of the PTO clutch is. It is unlike in known double clutches no medium pressure plate, the counter-pressure plate of both clutches is used, but each individual counter-pressure plates for the respective partial clutches.
  • the counter-pressure plate of the power take-off clutch is in one embodiment of the invention, the flywheel of the clutch assembly. The flywheel of the clutch assembly is firmly connected to the reaction plate of the drive clutch.
  • the counter-pressure plate of the drive clutch in one embodiment of the invention comprises a plate-shaped portion which cooperates with the pressure plate, and a wood-cylindrical portion which is connected to the flywheel.
  • the counter-pressure plate of the driving Coupling forms a housing part for the PTO clutch. This housing part is preferably made as a casting.
  • the auxiliary drive clutch comprises in one embodiment of the invention, a pressure plate which is mounted axially movable and can be actuated by means of at least one pressure anchor by a disc spring.
  • the pressure anchor is the transmission element between disc spring and pressure plate.
  • the pressure plate is pressed, for example, by leaf springs, which simultaneously serve for torque transmission between the pressure plate and the counter-pressure plate in the open position.
  • the counter-pressure plate has in one embodiment of the invention openings for receiving the pressure anchor.
  • the breakthroughs are designed to be a match between the pressure anchor and the counterpressure plate.
  • the plate spring of the power take-off clutch is arranged in an embodiment of the invention on the side facing away from the flywheel of the clutch housing.
  • the disc springs of both clutches are arranged on both sides of the coupling housing, so that the available space is used optimally.
  • the PTO clutch is an actively applied clutch (safety PTO) or an actively pressed clutch.
  • a double clutch with a clutch housing which comprises a sheet metal forming part in the drive train of a tractor for torque transmission between a drive motor and a transmission input shaft and for torque transmission between the internal combustion engine and a power take-off.
  • Figure 1 shows a first embodiment of a coupling arrangement according to the invention as
  • FIG. 1 shows a first embodiment of a coupling arrangement according to the invention as a schematic diagram
  • Figure 3 shows an embodiment according to the schematic diagram of Figure 1 in a spatial
  • Figure 4 shows the coupling arrangement of Figure 4 with disassembled plate spring for
  • FIG. 5 shows the pressure anchor in a single representation
  • Figure 6 shows the coupling arrangement of Figure 6 with disassembled plate spring for
  • FIG. 7 shows the pressure anchor in a single representation
  • FIG 1 shows a first embodiment of a coupling assembly 1 according to the invention in a schematic representation.
  • the clutch assembly 1 includes a drive clutch 2 and a PTO clutch 3. Both the drive clutch 2 and the PTO clutch 3 are the drive side connected to a not shown in Figure 1 crankshaft of an internal combustion engine.
  • the crankshaft of the internal combustion engine is for this purpose connected to a flywheel 4 shown only schematically in FIG.
  • the flywheel 4 is at the same time the counter-pressure plate of the auxiliary drive clutch 3, therefore, of the flywheel 4 in Figure 1, only the area which cooperates with the clutch disc of the auxiliary drive clutch 3 shown later, shown.
  • a counter-pressure plate 5 of the clutch 2 is firmly connected.
  • the connection can be made for example in the form of a screw or the like.
  • a clutch housing 6 is connected, for example screwed.
  • the auxiliary drive coupling 3 comprises a pressure plate 7 which is mounted so as to be displaceable in the axial direction with respect to the counterpressure plate 4 or the flywheel which carries the counterpressure plate 4.
  • the axial direction is the direction predetermined by the rotation axis R.
  • the entire coupling The arrangement 1 rotates in operation about the axis of rotation R, which is simultaneously the axis of rotation of the crankshaft and the input shafts, not shown here, of a manual transmission or the auxiliary drive, not shown.
  • a clutch disc 8 can be clamped in a conventional manner and thereby acted upon with a torque.
  • the clutch disc 8 includes in a conventional manner clutch linings 9, which is disposed on both sides of a disc 10 which is connected to a hub 11 which is connected, for example, a spline 12 with an input shaft of a side drive, not shown.
  • the pressure plate 7 of the PTO clutch 3 is connected, for example, with leaf springs, not shown, with the flywheel 4 and the counter-pressure plate 5, so that the pressure plate 7 is displaceable in the axial direction against the force of the springs, but can transmit a torque.
  • a plurality of pressure anchors 13, of which only one is shown in FIG. 1, are in contact with the radially outer region of a plate spring 15 with an annular connection region 14.
  • the plate spring 15 is connected to the coupling housing 6 by means of rivets 16.
  • Wire rings 17 are placed radially on both sides of the plate spring 15 around the rivets 6 around and define the Stülpstoffige S of the plate spring 15.
  • the drive clutch 2 comprises, in addition to the counter-pressure plate 5 of the drive clutch
  • Pressure plate 20 which is displaceable with leaf springs in the axial direction relative to the counter-pressure plate 5, but this is mounted with respect to torsionally rigid in the circumferential direction.
  • a disk spring 21 is in contact with the pressure plate 20 with its radially outer region.
  • the disk spring 21 is mounted on the clutch housing 6 by means of rivets 22 and wire rings 23, similar to the case of the first disk spring 15.
  • the wire rings 23 form the cusp center S2 of the plate spring 21. If a radially outer region " 24 is pressed in the direction of the arrow 25, the radially outer region of the plate spring 21 moves in the opposite direction, so that the pressure plate 20 is relieved and the distance between the pressure plate 20 and counter-pressure plate 5 is increased and the drive clutch 2 is opened.
  • Clutch disc 26 is arranged, which comprises a plate 27, which on both sides with friction 28 is provided and which is connected to a secondary flange 29 of a damper 30.
  • the damper 30 comprises, in addition to the secondary flange 29, a primary flange 31.
  • a bow spring arrangement 32 is clamped in a manner known per se so that a relative rotation of the secondary flange 29 with respect to the primary flange 31 is possible.
  • the primary flange 31 is in turn connected to a hub 33, which is connected by means of a spline with a hollow shaft which is arranged coaxially to the drive shaft of the auxiliary drive.
  • the plate spring 15 of the power take-off clutch is arranged on the side facing away from the flywheel 4 of the clutch housing 6.
  • the plate spring 21 of the drive clutch 2 is arranged on the flywheel 4 facing side of the clutch housing 6.
  • the clutch housing 6 comprises a mounting flange 34, with which the clutch housing 6 is screwed to the counter-pressure plate 5 and the flywheel 4, a substantially in section in the axial direction extending housing part 35 and a substantially radially extending housing part 36, on which the disc springs 15 and 21 are fastened by means of rivets 16 and 22.
  • the essentially radially extending region 36 comprises two regions 36a and 36b arranged offset from one another in the axial direction, wherein the region 36a, which serves to receive the plate spring 15 for the auxiliary drive coupling, is arranged axially further outward, that is to say away from the flywheel 4 as the radially further inwardly disposed portion 36 b, which serves to receive the plate spring 21 for the clutch 2.
  • the clutch assembly 1 thus comprises a superstructure, which essentially contains the elements of the drive clutch, and a substructure, which essentially contains the elements of the auxiliary drive clutch.
  • the exemplary embodiment of FIG. 1 comprises an actively pressed driving clutch and an actively pressed auxiliary drive clutch.
  • 2 shows an embodiment is shown in which the drive clutch 2 is actively pressed and the PTO clutch 3 is actively pressed (so-called safety PTO).
  • the essential difference from the embodiment of Figure 1 is that the contact point or in a spatial representation of the contact ring between the pressure armature 13 and the plate spring 15 is not as in the embodiment of Figure 1 radially outside of the defined by rivets 16 and wire rings 17 Stülp Vietnamesees S, but radially within the Stülpnikes S is located.
  • the plate spring 15 generates no engagement force, this is effected by actively pressing the plate spring 15 in the manner of a lever spring.
  • diaphragm spring is used here synonymous with lever spring in the actively compressed PTO clutch. If the diaphragm spring 15 is moved in the direction of the arrow 19, the pressure armature 13 and thus the pressure plate 7 move in the same direction. direction, so it is an actively pressed clutch.
  • screws 54 are also shown for screwing the counter-pressure plate 5 of the clutch 2 with the counter-pressure plate 4 of the auxiliary drive clutch 2 and the flywheel of the clutch assembly. With the screws 54 and the clutch housing 6 with the counter-pressure plates 4, 5 is screwed.
  • Figure 3 shows an embodiment according to the schematic diagram of Figure 1 in a three-dimensional representation.
  • Flywheel 4 is screwed. Furthermore, the coupling housing 6 can be seen, which is screwed by means of screws 37 with the counter-pressure plate 5. Tabs 38 of the pressure anchor 13 protrude through openings 39 of the coupling housing 6. The openings 39 are larger than the cross-sectional area of the tie rods 13, so that both have play with each other.
  • a leaf spring 40a is connected to the clutch housing 6 with rivets 41a and to the pressure plate 7 of the auxiliary drive clutch 3 with rivets 42a. Several of the leaf springs 40a are distributed over the circumference and serve for torque transmission between the pressure plate and the counter-pressure plate.
  • the plate spring 15 for the PTO clutch which is connected to a plurality of rivets 16 to the clutch housing 6. Also visible is the wire ring 17 facing away from the clutch housing 6. Furthermore, the disk spring 21 can be seen for the drive clutch.
  • FIG. 4 shows the coupling arrangement 1 according to FIG. 4 with the plate spring 15 removed for the auxiliary drive coupling 3. As a result, a larger part of the pressure anchor 13 is visible.
  • a leaf spring 40b is connected with rivets 41b to the clutch housing 6 and with rivets 42b to the pressure plate 20 of the clutch 2. Several of the leaf springs 40b are arranged distributed over the circumference and serve for torque transmission between the pressure plate 20 and the counter-pressure plate 5.
  • FIG. 5 shows the pressure anchor 13 in a single representation.
  • the pressure anchor 13 comprises an annular or hollow cylindrical base body 43, which in the installation position of the flywheel 4 facing away from the area is radially inwardly folded and forms a NERbund 44 for the plate spring 15.
  • a plurality of tabs 45 extend in the installed position in the direction of the flywheel 4.
  • the tabs 45 are with their head-side ends 46 in contact with the pressure plate 7 of the PTO clutch and are screwed to it.
  • bores 53 are bored axially from the pressure plate 7 elevating bores 53, into which screws, not shown, for screwing the tabs 45 to the pressure plate 7 are screwed. Not all bore flanges 52 must be provided with holes 53.
  • the pressure plate 7 according to Figure 8 can be used for both embodiments shown here.
  • Figure 6 and Figure 7 show illustrations comparable to Figures 4 and 5 for a
  • Embodiment of a clutch assembly as shown in a schematic diagram in Figure 2, ie for a clutch assembly with an actively pressed PTO clutch 3.
  • the clutch is practically not externally distinguishable from the embodiment of Figure 3, therefore, was on a re-presentation of the embodiment omitted in a fully assembled arrangement.
  • Figure 7 extends a plate-shaped part 47 of the pressure armature 13, this is also denoted in the schematic diagram of Figure 2 by the reference numeral 47, of the main body 43 radially inward and covers the hole circle for the rivets 16.
  • For the rivets 16 are, as can be seen in Figure 6, now 48 holes introduced into the plate-shaped part 47 of the pressure armature 13. Through the holes 47, the rivets 16 are passed and riveted to the coupling housing 6. It can be dispensed with the arranged on the coupling housing 6 side of the plate spring 15 arranged wire ring 17.
  • annular edge 49 is arranged, this is also shown in Figure 2, which is in contact with the disc spring 15, not shown in Figure 7. If the plate spring 15 is pressed in the illustration of Figure 2 with its contact area 18 in the direction of the flywheel 4, this is shown in Figure 2 and in Figure 1 by the arrow 19, the annular edge 49 and thus the pressure armature 13 is also in Direction of the arrow 19 pressed. The auxiliary drive clutch is thus closed when the contact area 18 is pressed in the direction of the arrow 19.
  • the plate spring 15 is therefore designed so that the auxiliary drive clutch is opened when not acted on the contact portion 18 plate spring 15 for the PTO clutch.
  • FIG. 7 shows the pressure anchor 13 of the exemplary embodiment of FIG. 6 in a single representation.
  • the difference to the pressure anchor in the embodiment of Figures 4 and 5 is merely the embodiment of the plate-shaped part 47 of the pressure armature 13 in the embodiment of Figures 6 and 7 relative to the 6.3bund 44 in the embodiment of the figures 4 and 5.
  • the pressure anchor 13 for the embodiment of Figures 4 and 5 is obtained.
  • the essential parts of both embodiments, ie the embodiments of Figures 4 and 5, which follow the schematic diagram of Figure 1, and the embodiment of Figures 6 and 7, which follows the schematic diagram of Figure 2 are therefore either the same or can be easily converted into each other ,
  • the pressure anchor 13 can be rebuilt as previously shown by twisting or separating the dish-shaped part 47 of the pressure armature 13 used in the embodiment of Figures 6 and 7 to the pressure armature 13 used in the embodiment of Figures 4 and 5.
  • the two embodiments differ in addition to the pressure armature 13 only by the plate spring 15 for the PTO clutch 3 and the length of the bolt 16. If necessary, it is also possible in the embodiment of Figures 6 and 7, the same disc spring as in the embodiment of Figures 4 and 5 whose spring characteristic would then not be optimized for the clutch used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

L'invention concerne un système d'embrayage (1) s'utilisant dans la chaîne cinématique d'un tracteur comprenant un embrayage principal (2) et un embrayage d'entraînement auxiliaire (3), l'embrayage principal étant disposé entre un moteur à combustion interne et un arbre primaire de boîte de vitesses, l'embrayage d'entraînement auxiliaire étant disposé quant à lui entre le moteur à combustion interne et un entraînement auxiliaire. Le système d'embrayage comprend un carter (6) d'embrayage comportant une pièce façonnée en tôle.
PCT/DE2012/000443 2011-05-16 2012-05-02 Système d'embrayage pour tracteurs à prise de force Ceased WO2012155877A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011101558 2011-05-16
DE102011101558.6 2011-05-16

Publications (1)

Publication Number Publication Date
WO2012155877A1 true WO2012155877A1 (fr) 2012-11-22

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ID=46320725

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2012/000443 Ceased WO2012155877A1 (fr) 2011-05-16 2012-05-02 Système d'embrayage pour tracteurs à prise de force

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DE (1) DE102012207244A1 (fr)
WO (1) WO2012155877A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014212416A1 (de) 2014-06-27 2015-12-31 Schaeffler Technologies AG & Co. KG Nasse Lamellendoppelkupplung mit Hebeln im Nassraum
DE102014212406A1 (de) 2014-06-27 2015-12-31 Schaeffler Technologies AG & Co. KG Nasse Lamellendoppelkupplung
DE102014212421A1 (de) 2014-06-27 2015-12-31 Schaeffler Technologies AG & Co. KG Nasse Lamellendoppelkupplung mit Hebeln außerhalb des Nassraums

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE528627A (fr) *
FR1154123A (fr) * 1956-05-26 1958-04-02 Ferodo Sa Perfectionnements aux embrayages multiples
FR1364142A (fr) * 1963-05-10 1964-06-19 Perfectionnements aux embrayages doubles à commandes séparées
US3185274A (en) * 1961-07-01 1965-05-25 Ferodo Sa Clutch device with multiple outputs
EP1275867A1 (fr) * 2001-07-13 2003-01-15 Volkswagen Aktiengesellschaft Embrayage double

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE528627A (fr) *
FR1154123A (fr) * 1956-05-26 1958-04-02 Ferodo Sa Perfectionnements aux embrayages multiples
US3185274A (en) * 1961-07-01 1965-05-25 Ferodo Sa Clutch device with multiple outputs
FR1364142A (fr) * 1963-05-10 1964-06-19 Perfectionnements aux embrayages doubles à commandes séparées
EP1275867A1 (fr) * 2001-07-13 2003-01-15 Volkswagen Aktiengesellschaft Embrayage double

Also Published As

Publication number Publication date
DE102012207244A1 (de) 2012-11-22

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