EP4405594A1 - Booster-kupplung mit einer rotationsachse für einen antriebsstrang - Google Patents
Booster-kupplung mit einer rotationsachse für einen antriebsstrangInfo
- Publication number
- EP4405594A1 EP4405594A1 EP22777217.5A EP22777217A EP4405594A1 EP 4405594 A1 EP4405594 A1 EP 4405594A1 EP 22777217 A EP22777217 A EP 22777217A EP 4405594 A1 EP4405594 A1 EP 4405594A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- booster
- torque
- clutch
- pilot
- input side
- 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.)
- Withdrawn
Links
- 238000004146 energy storage Methods 0.000 claims abstract description 51
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 36
- 230000007935 neutral effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 description 21
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 6
- 230000003042 antagnostic effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
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- 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
- F16D13/04—Friction clutches with means for actuating or keeping engaged by a force derived at least partially from one of the shafts to be connected
- F16D13/06—Friction clutches with means for actuating or keeping engaged by a force derived at least partially from one of the shafts to be connected with clutching members movable otherwise than 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
- F16D21/00—Systems comprising a plurality of actuated clutches
- F16D21/08—Serially-arranged clutches interconnecting two shafts only when all the clutches are engaged
-
- 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
-
- 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
- F16D41/00—Freewheels or freewheel clutches
- F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band
-
- 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
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
- F16D43/21—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members
- F16D43/211—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with radially applied torque-limiting friction surfaces
-
- 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
- F16D2023/123—Clutch actuation by cams, ramps or ball-screw mechanisms
Definitions
- the invention relates to a booster clutch with an axis of rotation for a drive train, having at least the following components:
- a pilot clutch with a friction pack comprising a pilot input side and a pilot output side;
- a booster output side connected to the pilot control input side in a torque-proof manner
- a booster input side which can be connected in a torque-proof manner to an input shaft
- the booster clutch is primarily characterized in that a drum is also included, and when a predetermined torque is applied to the booster input side and the booster output side as a result of the at least one roller rolling on the pair of ramps, the at least one rocker element moves radially against the drum is pressed.
- the invention also relates to a drive train and a motor vehicle with such a drive train.
- booster clutches Self-energizing clutches
- Such a booster clutch enables a large torque to be transmitted when the contact pressure or control pressure is (too) low. For this purpose, part of the torque to be transmitted is converted into a contact pressure.
- booster clutches have, for example, leaf spring systems or ball ramp systems, a torque being built up by means of a pilot clutch and then (at least part of) this torque being converted into an axial contact pressure.
- the known designs have a high axial space requirement.
- the (self-reinforcing) clutch can be integrated into the drive train, for example between the internal combustion engine and a transmission, for example in a hybrid module, in a space-neutral manner and with as little structural intervention as possible.
- the object of the present invention is to at least partially overcome the disadvantages known from the prior art.
- the features according to the invention result from the independent claims, for which advantageous configurations are shown in the dependent claims.
- the features of the claims can be combined in any technically meaningful way, whereby the explanations from the following description and features from the figures can also be used for this purpose, which include additional configurations of the invention.
- the invention relates to a booster clutch with an axis of rotation for a drive train, having at least the following components:
- a pilot clutch with a friction pack comprising a pilot input side and a pilot output side, wherein in a compressed state between the pilot input side and the pilot output side a torque can be transmitted by friction;
- a booster output side connected to the pilot control input side in a torque-proof manner
- a booster input side which can be connected in a torque-proof manner to an input shaft
- At least one rocker element which is arranged to transmit torque in the torque flow between the booster input side and the booster output side;
- At least one role which transmits torque via a pair of ramps between a corresponding one of the rocker elements and the booster Input side or the booster output side is arranged;
- At least one first energy storage element is either:
- the booster clutch is primarily characterized in that a drum is also included, and when a predetermined torque is applied to the booster input side and the booster output side as a result of the at least one roller rolling on the pair of ramps, the at least one rocker element moves radially against the drum is pressed.
- the booster clutch proposed here is set up for the intensified transmission of a torque about an axis of rotation for use in a drive train.
- the actuating force for generating the contact pressure force for frictionally transmitting a predetermined (total) torque is insufficient, for example so that only 20% [twenty percent] to 30% of the predetermined (total) torque can be transmitted.
- This actuating force or this control pressure is used for the pilot clutch.
- the further contact pressure is diverted from the applied and to be transmitted (total) torque.
- the pilot clutch is one Friction clutch, which can be adjusted to a slip limit via the contact pressure (or actuating force).
- the pilot clutch (and the drum, see below) is operated at the slip limit.
- the actuating force here is that force which is transmitted from a slave system, for example a slave piston in a hydraulic or pneumatic system or a release ring or engagement ring (possibly via a diaphragm spring) to a (pilot control) pressure plate.
- the contact pressure is the force that is applied directly to the friction partners of the pilot clutch. A drop in the contact pressure force over the transmission path is neglected here, or an effective mean of the contact pressure force for the (maximum) transmissible torque is considered.
- the booster clutch proposed here accordingly includes a pilot clutch with a friction pack.
- the friction package includes a pilot control input side and a pilot control output side, which can be pressed together in a rubbing (or slipping) manner with a torque that can be controlled via an axial contact pressure force, and a torque can thus be transmitted purely by friction.
- the (currently) maximum transmittable torque results from the product of the (currently) applied contact pressure, the mean radius of the friction surface and the (possibly variable, i.e. current) coefficient of friction.
- the pilot clutch has, for example, a pilot pressure plate, a pilot counterplate and a (pilot) friction disc, which can be pressed together by means of an axially acting pressure force.
- a pilot pressure plate for example, a pilot pressure plate, a pilot counterplate and a (pilot) friction disc, which can be pressed together by means of an axially acting pressure force.
- a plurality of friction disks and a corresponding number of intermediate plates are provided.
- the friction pack is designed as a disk pack.
- the pilot clutch is designed in the manner of a drum brake with a friction drum and at least one pressure block and thus a radially acting contact pressure.
- the pilot control input side is formed by the at least one pilot control friction disk or the friction drum.
- the pre-tax The output side is then formed by the pilot counterplate and the pilot pressure plate or by the at least one pressure block.
- the pilot control output side of the friction pack is in use connected to an output, for example a transmission input shaft (preferably directly) in a torque-proof manner, for example by means of a (plug-in) toothing.
- the pilot control output side is connected in a torque-proof manner to a rotor shaft of an electric drive machine, for example in a hybrid module, preferably via the co-rotating clutch cover of the pilot control clutch.
- an actuating device for the axial actuation of the friction pack, i.e. for applying a contact pressure to the friction pack, with the actuation force being used to move the friction pack from a normal position (open in a normally open configuration) to the actuated position (in a normally-open configuration closed) can be converted.
- the friction pack is (passively) returned to the normal position, for example with the aid of an antagonistic energy storage element, for example at least one leaf spring.
- the booster clutch has a wet design. In the case of the wet embodiment, any frictional heat that is introduced can be dissipated easily and the construction volume can therefore often be reduced.
- the booster clutch is dry. In the case of the dry embodiment, the booster clutch can be arranged outside of the transmission housing and can be manufactured inexpensively in comparison to a wet booster clutch. This also means that the coefficient of friction (with sufficient cooling) is within a very narrow tolerance window and the friction torque is almost force-proportional between a separated and a pressed state.
- the booster clutch also has a booster output side, which is connected in a torque-proof manner to the pilot control input side.
- the booster output side is formed, for example, by at least one disk segment-like or (preferably) disk-like component.
- the booster output side and the pilot control input side are formed separately and connected in a torque-proof manner, for example via teeth on a common shaft, by means of a rivet connection and/or a screw connection.
- the booster output side and the pilot control input side are arranged axially next to one another.
- the booster output side and the pilot control input side are arranged in an axially overlapping manner, preferably formed in one piece with one another.
- a booster input side is provided, which in use is connected to an input shaft in a torque-proof manner, for example by means of splines, compression and/or screw connections.
- the input shaft is a combustion engine shaft of an internal combustion engine.
- the booster input side forms the torque input side in a main state (in use in a motor vehicle, for example, a traction torque transmission).
- the booster output side forms the torque input side in a secondary state (when used in a motor vehicle, for example, a thrust torque transmission). Alternatively, this is vice versa.
- the booster input side is formed by at least one disc segment-like or (preferably) disc-like component.
- the booster input side comprises two disks, with at least one of the disks being connected to the input shaft in a torque-proof manner. The two disks are then, for example, spaced axially, for example by means of spacer bolts, and connected in a torque-proof manner.
- the booster output side is arranged axially between the two disks of the booster input side. Alternatively, this is vice versa.
- the booster clutch also has at least one rocker element, preferably two or three rocker elements, the at least one rocker element being arranged to transmit torque in the torque flow between the booster input side and the booster output side. At least one Rocker element can be moved both relative to the booster input side and relative to the booster output side.
- the at least one rocker element is disk-like or (preferably) disk segment-like and by means of at least one (first) roller and/or by means of at least one (first) energy storage element transmits torque directly to the booster input side (according to the above example with one of the disks, preferably connected to both panes).
- the at least one rocker element is also directly torque-transmittingly connected to the booster output side by means of at least one roller (other than the second one mentioned above) and/or by means of at least one energy storage element (other than the second one mentioned above).
- the rocker element is supported on itself or on an adjacent rocker element by means of at least one energy storage element, for example a bow spring, a helical compression spring (for example with a straight spring axis), a leaf spring, a gas pressure accumulator or the like.
- the energy storage element is supported on a corresponding, preferably one-piece, connection device of the associated rocker element in a force-transmitting or torque-transmitting manner.
- the at least one rocker element is supported on the booster input side and on the booster output side by means of the rollers connected in series, with the rocker element having a rocker track for one of the rollers and on on the booster input side and on the booster output side a complementary counter-track is formed for the same (assigned) role.
- the complementary counter track is formed by the booster input side or by the booster output side, preferably in one piece. Torque is transmitted via the counter track and rocker track, which form a pair of ramps.
- rollers web side
- the rocker element is on the respective other side of the rocker element formed a power side in that the rocker element is supported directly by means of an energy storage element on the respective booster side.
- the force side is preferably formed on the input side and the web side is formed on the output side.
- the track side is designed with at least one roller and a corresponding pair of ramps.
- the ramp pairing is designed as a transmission pairing.
- a radial (preferably inward) movement of the rocker element results from a forced orbital movement of the translating rollers. If, for example, a torque is introduced, for example from the booster input side, the rollers on the seesaw track and the complementary counter track are moved from a rest position in the corresponding direction on the ramp-like see-saw track (high) rolled. Rolling up here merely indicates for the sake of illustration that work is being carried out.
- Rolling down means that stored energy is released from the energy storage element in the form of a force on the associated rocker element. So up and down do not necessarily correspond to a spatial direction, not even in a co-rotating coordinate system.
- the rollers force the associated rocker element to move relative to the booster input side and the booster output side, and the antagonistically acting energy storage element is tensioned accordingly.
- the force is absorbed in the form of compression, expansion, torsion or other storage of energy by the correspondingly designed energy storage element and with a time delay, preferably (almost) without dissipation, passed on to the other side, here for example the booster output side.
- the torque entry here for example the Booster input side, including the torsional vibration, is thus preferably (virtually) loss-free, changed over time, here for example to the booster output side.
- Two energy storage elements are preferably provided for acting on a (single) rocker element, the energy storage elements being arranged antagonistically to one another and preferably brought into balance with one another in accordance with the embodiment of the rocker tracks and complementary counter tracks.
- at least one restricted guide is provided, by means of which a movement is imposed on at least one of the rocker elements in a geometrically guided manner, for example in the manner of a rail or groove and an encompassing pin or an engaging spring.
- the at least one energy storage element acts on the associated rocker element with a force direction with a vector component in the circumferential direction.
- the circumferential direction is defined on a circle concentric to the axis of rotation. In one embodiment, the circumferential direction is constantly aligned via a movement of the associated rocker element, migrating on a constant circle or oriented constantly or migrating on a variable circle.
- the circle is at least large enough to touch the rocker element, preferably large enough for the circle to intersect a contact point or a contact surface at which point the forces are transmitted between the relevant energy storage element and the associated rocker element.
- a circumferential direction is perpendicular to a radius centered on the axis of rotation.
- the respective underlying radius intersects the contact point or the contact surface of the energy storage element and the rocker element.
- a direction of force with a large vector component in the circumferential direction thus results on the rocker element, preferably with a vector component in the circumferential direction which is greater than the vector component in the radial direction.
- This means that the force on the rocker element is not aligned purely radially, but exclusively (at the contact point) tangentially to the circumferential direction or with a radial vector component and with a (at the contact point) tangential vector component.
- the rocker element is supported in an insufficiently defined manner via the rollers, for example only supported in a radially defined manner, with the at least one energy storage element defining the movement as a result of the force application direction, for example exclusively in the circumferential direction.
- an additional guide for the rocker element is provided.
- a translation pairing is formed as described above.
- the power side is in the torque flow.
- a radial movement of the rocker element does not result directly here. Rather, a force transmission that acts (approximately) purely in the direction of rotation is formed.
- At least one of the rocker elements is arranged axially between and radially overlapping with the booster input side.
- a rocker element comprises a pair of disks and the booster input side (for example a single disk) is arranged axially between the pair of disks of the at least one rocker element.
- the booster input side is connected radially-centrally to the input shaft and the booster output side is connected in a torque-proof manner to the pilot control input side radially-outside.
- the booster clutch has a drum.
- the drum is designed coaxially to the axis of rotation and with a suitable axial extension.
- the drum is arranged radially outside the at least one rocker element, in another embodiment the drum is arranged radially inside the rocker element.
- the drum and the at least one rocker element are arranged in an axially overlapping manner.
- the at least one roller When a predetermined torque is applied to the booster input side and the booster output side due to a friction torque on the pilot clutch, the at least one roller is rolled from a rest position in the corresponding direction on its ramp pair forming a transmission path. Because this force acting in the direction of rotation is translated into a radial movement by the translation path, the at least one rocker element is pressed radially against the drum as a result of the rolling of the roller. The antagonistic force of the at least one energy storage element is thus overcome and the rocker element (in one embodiment in the manner of a brake pad) is pressed radially against the drum.
- a further torque-transmitting clutch (as a drum clutch) connected in parallel with the pilot clutch is thus formed by the at least one rocker element and the drum.
- This parallel-connected (drum) clutch only closes when the friction pack of the pilot clutch is closed and there is sufficient torque for closing on the booster input side and the booster output side. If the latter is not the case, the (maximum) torque that can be transmitted by the pilot clutch alone is more than sufficient.
- the (radial) contact pressure between the drum and the at least one rocker element required for a desired (maximum) transmittable torque is provided by part of the applied torque via the booster input side and the booster output side by means of the transmission path.
- the drum and the at least one rocker element are set up for a pure friction fit, a pure form fit (non-round cross section, for example a toothing) or at least an initial friction fit and at least subsequent form fit, for example by means of a cone with a non-round cross section (For example, approximately triangular with rounded corners, as is known, for example, in a so-called wedge clutch).
- two or more rocker elements are provided, which are preferably arranged rotationally symmetrically to the axis of rotation, so that the booster clutch is balanced using simple means.
- An embodiment with exactly two rocker elements is advantageous for a small number of components and (transmission) paths.
- An embodiment with exactly three rocker elements is advantageous for a small radial component in the at least one energy storage element when the force is applied to the respective rocker element.
- At least one of the following components or at least one of the components of one of the following assemblies is manufactured as a sheet metal part, preferably by means of stamping and/or sheet metal forming, and can thus be produced particularly cost-effectively in large quantities: a pilot control counter-plate, a pilot control pressure plate, a Booster output side, a booster input side, the at least one rocker element, a co-rotating clutch cover.
- the drum is connected to the pilot control output side in a torque-transmitting manner, preferably being formed in one piece with a pilot control output component.
- the drum is not separately connected to the pilot control clutch to transmit torque to the output of the booster clutch, but is directly or indirectly connected to the pilot control output side in a torque-transmitting manner.
- the drum is formed separately from the pilot control output side and is connected to it in a torque-transmitting manner, for example via a spline, screw connection or riveted connection.
- the drum is formed in one piece by a pilot output component, for example the pilot counterplate, the drum then being arranged so as to overlap axially with the friction assembly on the pilot input side.
- the torque transmitted by the drum is thus transmitted parallel to the torque between the pilot control input side and the pilot control output side.
- the drum can be directly connected to the output, preferably formed in one piece with the output.
- the drum is connected directly to the output in a torque-proof manner or is formed in one piece with it.
- This has the advantage that the rigidity chain of the parallel-connected pilot clutch and the drum clutch (drum and rocker element(s)) are separate from one another and can each be designed independently of one another.
- the at least one rocker element has a power side and a track side, the track side comprising the at least one second roller with a translating ramp pairing, with the power side preferably being arranged on the rocker element on the input side, and/or wherein the force side preferably comprises a first roller for radially neutral transmission of a force in the direction of rotation.
- Previously known designs of self-energizing clutches, as mentioned above, are often difficult to control, so that there are delays in the closing and opening operations and also undesired vibrations in the drive train.
- one side of the rocker element is a force side, as already explained at the outset.
- the task of such a force side is to transmit the force between the rocker element and the corresponding booster side independently of the respective (radial) position of the rocker element.
- a radially aligned slot or a radially aligned track is formed with a (first) roller on the power side in the booster side (for example a disk) and on the rocker element.
- a force in the direction of rotation can thus be transmitted independently of the radial relative position of the rocker element forced as a result of the ramp pairing of the (second) roller acting as a transmission path to the booster side on the force side.
- a radially neutral power transmission is achieved, but at the same time a ramp pairing is provided that reinforces the direction of rotation, so that in addition to a relative angle of rotation between the booster input side and the booster output side, there is also an overlaying relative angle of rotation between the corresponding booster side and the Rocker element is generated. This superimposed torsion angle depends on the amount of the relative radial displacement of the rocker element to the booster sides as a result of the rolling of the second roller on the translating pair of ramps (web side).
- a (first) energy storage element is provided, which can be slipped in the radial direction or tilted about an axis parallel to the axis of rotation of the booster clutch, so that a radially neutral power transmission between the relevant booster side and the power side of the rocker element is ensured.
- the power side is formed between the rocker element and the booster input side, that is to say on the input side.
- At least one second energy storage element is provided, which is arranged to transmit torque between the booster input side and the booster output side.
- At least one second energy storage element is provided here, for example an arc spring, a helical compression spring (for example with a straight spring axis), a leaf spring, a gas pressure accumulator or the like, which is arranged to transmit torque between the booster input side and the booster output side.
- the advantage here is that the at least one second energy storage element can be used to reduce torsional vibrations that occur, for example from an internal combustion engine.
- at least two second energy storage elements are provided, preferably for one embodiment comprising at least one helical compression spring with a straight spring axis, particularly preferably three or more second energy storage elements.
- the booster input side and the booster output side preferably have a corresponding, preferably one-piece, connection device, for example a contact surface and/or a rivet point. If there is a change in the applied torque and, as a result, a speed difference between the booster input side and the booster output side, such as in the case of torsional vibration, the force in the form of compression, expansion, torsion or other energy storage can be absorbed by the correspondingly designed second energy storage element and with a time delay, preferably (virtually) dissipation-free, can be passed on to the booster output side.
- a time delay preferably (virtually) dissipation-free
- the pilot control input side of the booster output side is formed in one piece.
- the booster output side is arranged axially between the pilot control counterplate and the pilot control pressure plate, with the booster output side then being set up as a (pilot control) friction disc in this embodiment.
- a friction lining preferably two friction linings axially on both sides, is then applied to the booster output side, which comes into frictional contact with the pilot counterplate and the axially opposite pilot pressure plate.
- the at least one rocker element and the booster output side are arranged in a common axial installation space between a booster input side, the booster input side comprising two disks connected to one another in a torque-proof manner, for example with a spacer bolt.
- the at least one first energy storage element is preferably arranged between the at least one rocker element and the optional second energy storage element between the booster output side and the booster input side radially outside of the first energy storage element and the at least one rocker element.
- the at least one second roller is arranged radially outside of the at least one rocker element, preferably on (at least approximately) the same circumferential circle.
- This circumferential circle is such a circle to which the spring axis is aligned tangentially and on which the second roller axis lies in the middle.
- the at least one friction lining is arranged radially outside of the at least one rocker element and the at least one second roller.
- the pilot output side with a first torsional stiffness and the drum with a second torsional stiffness are connected to an output in a torque-transmitting manner, the first torsional stiffness being greater than the second torsional stiffness.
- slipping phases occur in the frictional contact between the at least one rocker element and the drum during the load, so that the ramp mechanism of the translating ramp pairing can move up.
- the factor of amplification is the ratio of that maximum transmittable torque of the drum clutch (numerator) and the maximum transmittable pilot torque of the pilot clutch (denominator).
- the tension in the system can be released at any time if the maximum transmittable pilot control torque of the pilot control clutch is limited to an amount smaller than the product of the normal force and the sine of the slope angle of the ramp pairing or smaller than the product of the before the drum clutch was released last stored contact pressure and the tangent of the gradient angle of the ramp pairing.
- the second torsional stiffness between the drum and the output
- the first torsional stiffness between the pilot output side and the output.
- the ratio of the two torsional rigidities must be smaller than the friction angle ratio, so that the drum torque of the drum clutch can be reliably controlled via the pilot torque of the pilot clutch.
- a drive train having at least the following components:
- a booster clutch according to an embodiment according to the above description, wherein a torque between the at least one drive machine and the consumer can be transmitted by means of the booster clutch.
- the drive train proposed here comprises a first drive machine, for example an internal combustion engine with a combustion engine shaft and a transmission for transmitting torque between the combustion engine shaft and a consumer, for example the drive wheels in a motor vehicle.
- a first drive machine for example an internal combustion engine with a combustion engine shaft and a transmission for transmitting torque between the combustion engine shaft and a consumer, for example the drive wheels in a motor vehicle.
- the booster clutch which is designed according to an embodiment according to the above description, the torque transmission between the internal combustion engine and the consumer can be transmitted, with a very low (external) force or pressure has to be applied to actuate the booster clutch.
- An actuating device can thus be implemented with a small installation space requirement and/or at low cost.
- Torque transmission between the consumer and the combustion engine shaft is preferably possible in both directions, for example in a motor vehicle to accelerate the motor vehicle (traction mode) and in the opposite direction (overrun mode), for example to use the engine brake to decelerate the motor vehicle.
- an electric drive machine with a rotor shaft is also connected in the torque flow on the output side of the booster clutch and in front of the consumer.
- the electric drive motor and the booster clutch together form what is known as a hybrid module, which can be easily integrated into the drive train as a structural unit.
- a motor vehicle having a drive train according to an embodiment according to the above description and at least one drive wheel, wherein the at least one drive wheel can be driven by means of the drive train to propel the motor vehicle.
- the installation space is particularly small in motor vehicles due to the increasing number of components and it is therefore particularly advantageous to use a drive train of small size.
- the intensity of the disruptive torsional vibrations is increased.
- hybridization in which an electric drive machine is used more and more frequently in operation is brought or even forms the main source of torque and the smallest possible internal combustion engine is to be used, which, however, must be switched on and off the drive train much more frequently. It is therefore a challenge to provide a sufficient leveling out of rotational irregularities and a sufficient actuating force with low part costs and little available installation space at the same time.
- Passenger cars are assigned to a vehicle class according to, for example, size, price, weight and performance, with this definition being subject to constant change according to market needs.
- vehicles in the small and micro car classes are assigned to the subcompact car class according to the European classification, and in the British market they correspond to the supermini class or the city car class.
- Examples of the subcompact class are a Volkswagen up! or a Renault Twingo.
- Examples of the small car class are an Audi A1, Volkswagen Polo, Opel Corsa or Renault Clio.
- Well-known hybrid vehicles are the BMW 330e or the Toyota Yaris Hybrid.
- An Audi A6 50 TFSI e or a BMW X2 xDrive25e, for example, are known as mild hybrids.
- FIG. 2 the circuit diagram according to FIG. 1 in the amplifying state
- FIG. 4 a booster clutch in a sectional view
- FIG. 5 a motor vehicle with a drive train.
- the switching scheme is a translatory substitute model.
- the (straight) horizontal arrows correspond to the direction of rotation 22 in a real implementation (as shown, for example, in FIG. 3 or FIG. 4).
- the vertical arrows correspond to the radial direction in the real implementation.
- An input torque 30 is applied to the booster input side 10 and results in a (total) torsion angle 31, with an input-side torsion angle 32 initially acting on the input side of the rocker element 11, which is designed here (purely optional) as a pure power side 20 with a first roller 12, independently of the relative vertical (i.e. radial) position. If the pilot clutch 4 is open, the rocker element 11 is simply rotated to the right as shown.
- the pilot control input side 6 fixed to the pilot control output side 7 and thus the booster output side 8 is fixed.
- the pilot control output side 7 is connected to the output 19 at which an output torque 33 antagonistic to the input torque 30 is present and results in a pilot control torque 34 on the pilot control output side 7 .
- the rocker element 11 is mounted against a radial support 35 . This radial support 35 is formed, for example, by the booster input side 10, the booster output side 8 or the output 19. Alternatively or additionally, the rocker element 11 is supported on itself or on an adjacent further rocker element 11 (cf. FIG. 3).
- FIG. 2 the circuit diagram of FIG. 1 is shown in the amplifying state.
- an input torque 30 is applied to the booster input side 10 and results in a (total) angle of rotation 31.
- the pilot control clutch 4 is closed (sufficiently strongly) here, ie the friction pack 5 is pressed.
- the pilot control input side 6 is fixed to the pilot control output side 7 and thus the booster output side 8 is also fixed.
- the second roller 13 rolls on the track side 21 (here purely optionally as the only) output side of the rocker element 11 by means of the pairing of ramps 14 made up of (rocker-side) rocker track 36 and (pilot-side) counter-track 37, which rolls in a vertical (i.e.
- the booster clutch 1 is thus closed via the pilot clutch 4 by part of the input torque 30, specifically controlled by means of the pilot clutch 4 (or by the output torque 33 in the case of reverse torque direction).
- the maximum transmittable torque is increased.
- the (maximum) transmissible torque remains controllable by means of the pilot clutch 4 in every state.
- the booster input side 10 to the booster output side 8 of a pilot clutch 4 in a schematic sectional front view, with the axis of rotation 2 being aligned normal to the image plane.
- the booster output side 8 is formed by an annular disk.
- the drum 16 is shown radially on the inside as a cut ring. In this embodiment (purely optional) from even further radially inward to (likewise purely optional) radial overlapping with the ring disk of the booster output side 8 in the background the (e.g. second) disk 43 of the booster input side 10 can be seen.
- Rocker elements 11 are arranged radially between the ring disk of the booster output side 8 and the drum 16 (here purely optionally three), which in the shown (open) state maintain a defined radial gap to the drum 16 radially on the inside.
- the rocker elements 11 each have an input-side force side 20 with a (purely optional) first roller 12 (here, for the sake of clarity, only the top one in the figure is labeled pars-pro-toto) and an output-side web side 21 with (purely optional two) second rollers 13 (here, for the sake of clarity, pars-pro-toto only the one on the left in the picture is designated).
- second energy storage elements 23 are supported in a torque-transmitting manner and form a stop for a maximum angle of rotation between the two sides.
- the second energy storage elements 23 are sufficiently soft for a desired booster characteristic of the booster clutch 1.
- the rocker elements 11 are (purely optional) supported against one another by means of a corresponding number of first energy storage elements 15 on one another. These first energy storage elements 15 have both a radial force component and a force component in the direction of rotation 22 so that their (antagonistic) force must be overcome in order to press the rocker elements 11 radially inwards against the drum 16 for frictional engagement.
- pure protection against unwanted slipping in the open state of the booster clutch 1 is thus provided.
- a defined torque range is also available, in which a torque is transmitted solely by the pilot clutch 4 (compare FIG. 4).
- the booster input side 10 rotates relative to the booster output side 8.
- the rocker elements 11 are each carried along by means of the first rollers 12 (power side 20).
- the relative rotation of the Rocker elements 11 to the booster output side 8 in turn forces the second rollers 13 to roll on the rocker track 36 and the complementary counter track 37 of the ramp pair 14 in question -Inward movement of the respective rocker element 11 against the storage force of the first energy storage elements 15 forced.
- the rocker elements 11 are thus pressed against the drum 16 (after the said radial gap has been overcome), ie the drum clutch is closed.
- first rollers 12 In the case of the first rollers 12, the force resulting from (part of) the applied torque is still transmitted in the direction of rotation 22 and (for example only) the changing relative radial position of the rocker elements 11 to the booster input side 10 is compensated for by rolling.
- a respective first roller 12 runs on a seesaw track 36 and a complementary counter-track 37 (covered here and therefore shown with a broken line) of the pair of ramps 14 in question.
- This pairing of ramps 14 is preferably not implemented in a translating manner, but rather in a neutral manner.
- the rollers 12,13 are shown here in a neutral position (no torque applied).
- a reversal of the torque direction leads to a twisting in the opposite direction, which, with a negligible hysteresis due to an inevitable zero crossing, is not noticeable even during torque transmission and is also not audible due to the gentle closing of the drum clutch.
- FIG. 4 shows a booster clutch 1 in a sectional view, with the axis of rotation 2 being shown at the bottom of the illustration.
- An input shaft 9 for example a combustion engine shaft 44 or a corresponding connection, is provided on the left in the illustration, which is connected in a torque-proof manner to a second disk 43 on a booster input side 10 .
- the second disk 43 is connected to the first disk 45 in a torque-proof manner (not visible in section).
- the booster input side 10 is connected to a rocker element 11 in a torque-transmitting manner via the first roller 12 lying in section.
- the rocker element 11 is connected in a torque-transmitting manner to the booster output side 8 via a second roller 13 (not visible in this section).
- the Disks 45 , 43 on the booster input side 10 are also connected to the booster output side 8 via a second energy storage element 23 .
- a drum 16 is arranged spaced apart with a defined radial gap radially inside the rocker elements 11 , the drum 16 (purely optional) being formed here in one piece with the pilot counterplate 17 .
- the components from the drum 16 to the booster output side 8 are connected to one another in a torque-transmitting manner, at least in principle, as explained in FIG. 3 .
- the pilot friction disk 46 is formed from the disk-like booster output side 8 (or from the entire drum clutch), with a friction lining 47 being fastened on both sides of the booster output side 8 .
- the friction linings 47 can be pressed between the (axially rigid) pilot counterplate 17 and the (axially movable) pilot pressure plate 18 .
- the pilot counterplate 17 is connected in a torque-proof manner to an output 19 (for example a transmission input shaft) via a clutch cover 48 that rotates with it.
- the pilot control pressure plate 18 is connected to the co-rotating clutch cover 48 and thus to the output 19 in a torque-proof and axially movable manner via a third energy storage element 49 (here a leaf spring assembly).
- the pilot pressure plate 18 can be actuated by means of a (purely optional hydraulic) slave piston 50 .
- the friction pack 5 consisting of the pilot control counter-plate 17, pilot control friction disc 46 and the pilot control pressure plate 18 is of normally open design here, with the friction pack 5 (passive) being kept open by the third energy storage element 49 and being activated by the actuating force of the slave piston 50 (active and controllable) can be closed.
- a torsional vibration damper 51 is also provided (purely optional) at the outlet 19, which is not further identified here.
- the co-rotating clutch cover 48 is (purely optional) a connection for a rotor shaft 52, preferably for directly receiving the rotor magnets, of an electric drive machine 25.
- the booster clutch 1 shown is preferably integrated into a hybrid module.
- a motor vehicle 29 is shown purely schematically with a drive train 3 in a plan view, wherein in a transverse front arrangement, a first engine 24, such as an internal combustion engine 24, with its Combustion shaft 44 and a corresponding motor axis 53 and an electric drive motor 25 with its rotor shaft 52 coaxial with the first engine 24, such as an internal combustion engine 24, with its Combustion shaft 44 and a corresponding motor axis 53 and an electric drive motor 25 with its rotor shaft 52 coaxial with the
- Motor axis 53 are arranged transversely to the longitudinal axis 54 of the motor vehicle 29 and in front of the driver's cab of the motor vehicle 29 and are comprised of the drive train 3 .
- the drive train 3 includes a gear 28 for transmitting torque between the combustion engine shaft 44 and two consumers 26,27, in this exemplary embodiment the left-hand drive wheel 26 and the right-hand one
- the torque can be transmitted between the internal combustion engine 24 and the consumers 26, 27 by means of a booster clutch 1 within the transmission 28, with only a very small (external) force or pressure being required to actuate the booster clutch 1.
- Booster clutch 35 Radial support of axis of rotation 36 Rocker track of drive train 37 Counter track of pilot clutch 38 Rocker-side torsion angle of friction assembly 39 Drum engagement travel of pilot control input side 40 First spring force of pilot control output side 41 Contact pressure
- Booster output side 42 Booster torque, input shaft 43 Second disc, booster input side 44 Combustion shaft, rocker element 45 First disc, first roller (input) 46 Pilot friction disc, second roller (ramp) 47 Friction lining, ramp pairing 48 Clutch cover, first energy storage element 49, third energy storage element, drum (leaf spring)
- Pilot counterplate 50 Slave piston Pilot pressure plate 51 Torsional vibration damper output (transmission input shaft) 52 Rotor shaft power side 53 Motor axis
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021124323.8A DE102021124323B3 (de) | 2021-09-21 | 2021-09-21 | Booster-Kupplung mit einer Rotationsachse für einen Antriebsstrang |
| PCT/DE2022/100676 WO2023046233A1 (de) | 2021-09-21 | 2022-09-14 | Booster-kupplung mit einer rotationsachse für einen antriebsstrang |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4405594A1 true EP4405594A1 (de) | 2024-07-31 |
Family
ID=83447763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22777217.5A Withdrawn EP4405594A1 (de) | 2021-09-21 | 2022-09-14 | Booster-kupplung mit einer rotationsachse für einen antriebsstrang |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12338862B2 (de) |
| EP (1) | EP4405594A1 (de) |
| JP (1) | JP2024532543A (de) |
| KR (1) | KR20240042645A (de) |
| CN (1) | CN117836532A (de) |
| DE (1) | DE102021124323B3 (de) |
| WO (1) | WO2023046233A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019121204A1 (de) * | 2019-02-27 | 2020-08-27 | Schaeffler Technologies AG & Co. KG | Torsionsschwingungsdämpfer mit einer Rotationsachse für einen Antriebsstrang |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2919000A (en) | 1956-02-06 | 1959-12-29 | Gen Motors Corp | One way clutch with electromagnetic energizer |
| US3037586A (en) * | 1959-05-18 | 1962-06-05 | Warner Electric Brake & Clutch | Momentum type torque producing device |
| US4069901A (en) * | 1976-06-30 | 1978-01-24 | Sessler John A | Momentum type electrically controlled torque producing devices |
| JPS62233524A (ja) | 1986-03-31 | 1987-10-13 | Honda Motor Co Ltd | 車両用クラツチ装置 |
| JPH06280901A (ja) | 1993-03-22 | 1994-10-07 | Wakayama Nainenki Kk | 遠心式クラッチ |
| JP2008082397A (ja) | 2006-09-26 | 2008-04-10 | Jtekt Corp | 駆動力伝達装置 |
| WO2011050775A1 (de) * | 2009-10-29 | 2011-05-05 | Schaeffler Technologies Gmbh & Co. Kg | Nasskupplung |
| JP5693593B2 (ja) | 2009-10-29 | 2015-04-01 | シェフラー テクノロジーズ アクチエンゲゼルシャフト ウント コンパニー コマンディートゲゼルシャフトSchaeffler Technologies AG & Co. KG | クラッチ装置 |
| JP5527611B2 (ja) | 2010-11-04 | 2014-06-18 | アイシン精機株式会社 | 電磁クラッチ |
| US20140158489A1 (en) * | 2012-12-06 | 2014-06-12 | Tai-Her Yang | Clutch actuated by inertia mass and friction damping |
| DE102014210976A1 (de) | 2014-06-10 | 2015-12-17 | Schaeffler Technologies AG & Co. KG | Reibungskupplung |
| JP6884157B2 (ja) * | 2016-03-16 | 2021-06-09 | シェフラー テクノロジーズ アー・ゲー ウント コー. カー・ゲーSchaeffler Technologies AG & Co. KG | クラッチシステム |
| DE102016209019B3 (de) * | 2016-05-24 | 2017-05-18 | Schaeffler Technologies AG & Co. KG | Kupplungseinrichtung und Hybridmodul |
| DE102016210521A1 (de) | 2016-06-14 | 2017-12-14 | Schaeffler Technologies AG & Co. KG | Kupplungsvorrichtung |
| JP6822931B2 (ja) * | 2017-09-28 | 2021-01-27 | 株式会社シマノ | ブレーキ装置 |
| US20190128341A1 (en) * | 2017-10-27 | 2019-05-02 | Schaeffler Technologies AG & Co. KG | Cage actuation for wedge clutch |
| CN115030967B (zh) | 2022-06-06 | 2024-04-16 | 中国第一汽车股份有限公司 | 一种四驱分动器执行系统以及针对该系统的初始位置自学习方法和装置 |
-
2021
- 2021-09-21 DE DE102021124323.8A patent/DE102021124323B3/de active Active
-
2022
- 2022-09-14 CN CN202280057325.6A patent/CN117836532A/zh active Pending
- 2022-09-14 JP JP2024514539A patent/JP2024532543A/ja not_active Ceased
- 2022-09-14 EP EP22777217.5A patent/EP4405594A1/de not_active Withdrawn
- 2022-09-14 KR KR1020247007719A patent/KR20240042645A/ko active Pending
- 2022-09-14 US US18/690,579 patent/US12338862B2/en active Active
- 2022-09-14 WO PCT/DE2022/100676 patent/WO2023046233A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240042645A (ko) | 2024-04-02 |
| JP2024532543A (ja) | 2024-09-05 |
| CN117836532A (zh) | 2024-04-05 |
| US12338862B2 (en) | 2025-06-24 |
| WO2023046233A1 (de) | 2023-03-30 |
| DE102021124323B3 (de) | 2022-11-10 |
| US20240376940A1 (en) | 2024-11-14 |
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