CN113266653A - Friction clutch for the friction-and form-fitting transmission of torque - Google Patents

Friction clutch for the friction-and form-fitting transmission of torque Download PDF

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Publication number
CN113266653A
CN113266653A CN202110172198.1A CN202110172198A CN113266653A CN 113266653 A CN113266653 A CN 113266653A CN 202110172198 A CN202110172198 A CN 202110172198A CN 113266653 A CN113266653 A CN 113266653A
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CN
China
Prior art keywords
friction
clutch
hub
torque
friction pair
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Pending
Application number
CN202110172198.1A
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Chinese (zh)
Inventor
克里斯托弗·拉贝尔
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of CN113266653A publication Critical patent/CN113266653A/en
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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
    • 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
    • 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
    • F16D13/46—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs in which two axially-movable members, of which one is attached to the driving side and the other to the driven side, are pressed from one side towards an axially-located member
    • F16D13/48—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs in which two axially-movable members, of which one is attached to the driving side and the other to the driven side, are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member
    • F16D13/50—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs in which two axially-movable members, of which one is attached to the driving side and the other to the driven side, are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member in which the clutching pressure is produced by springs only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • 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
    • 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
    • F16D13/71—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members in which the clutching pressure is produced by springs only
    • 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
    • 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
    • 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
    • F16D25/12—Details not specific to one of the before-mentioned types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The invention relates to a friction clutch, in particular for a drive train of a motor vehicle, having a rotational shaft, comprising at least one first friction pair and at least one second friction pair, wherein the first and second friction pairs can be displaced in relation to one another and to a counter plate in the direction of the rotational shaft in order to establish a friction fit between the first and second friction pairs, wherein the at least one first friction pair is connected to a clutch input and the at least one second friction pair is connected to a clutch output, wherein the clutch output is designed as a hub having teeth for connection to a shaft body, the invention being characterized in that: the at least one second friction pair is connected with the hub part in a friction-fit-only manner by the switching component for transmitting torque, and the switching component is suitable and determined for establishing a form-fit connection between the hub part and the at least one first friction pair through the displacement of the hub part along the direction of the rotating shaft under the condition that a preset limit torque is exceeded.

Description

Friction clutch for the friction-and form-fitting transmission of torque
Technical Field
The invention relates to a friction clutch, in particular for a drive train of a motor vehicle, by means of which high torques can be transmitted in a friction-and form-fitting manner.
Background
From published german patent application DE 102018122385.4, a diaphragm clutch is known, in which, on the one hand, as is customary in diaphragm clutches, torque can be transmitted in a friction-fit manner, but, on the other hand, a positive-locking connection can also be established for transmitting torque. However, the solution used in this case is only suitable for a diaphragm clutch.
Disclosure of Invention
On this basis, the object of the invention is to overcome at least partially the problems known from the prior art and in particular to provide a friction clutch in which high torques can be transmitted in a friction-and form-fitting manner, both for a diaphragm clutch and for a multiplate clutch.
Further advantageous embodiments of the invention are given below. The features mentioned individually in the claims can be combined with one another in a technically feasible manner to define further embodiments of the invention. The friction clutch according to the invention, in particular for a drive train of a motor vehicle,
has a rotating shaft and a rotating shaft which are arranged in the rotating shaft,
comprises at least one first friction pair and at least one second friction pair,
wherein, in order to establish the friction fit between the first friction pair and the second friction pair, the first friction pair and the second friction pair can move relative to each other along the direction of the rotating shaft,
wherein at least one first friction pair is connected with the input end of the clutch, and at least one second friction pair is connected with the output end of the clutch,
wherein the clutch output is configured as a hub having teeth for connection with the shaft.
At least one second friction pair is connected with the hub part in a friction fit mode through the switching component for transmitting torque. The switching means is suitable and intended for establishing a positive-locking connection between the hub and the at least one first friction pair by displacing the hub in the direction of the rotational axis if a predefinable limit torque is exceeded.
The friction clutch may be a single-plate or multi-plate clutch, or may be a diaphragm clutch. In the case of a single-plate clutch, it is preferred if the at least one first friction pair is designed as a pressure plate and the at least one second friction pair is designed as a clutch plate. In the case of a multi-plate clutch, more clutch plates are added which act as a second friction pair and corresponding intermediate plates which act as a first friction pair. In the case of a diaphragm clutch, the at least one first friction partner is designed as an outer diaphragm and the at least one second friction partner as an inner diaphragm. To establish the friction fit, the first and second friction pairs are pressed towards each other and towards the counter-pressure plate. For this purpose, conventional actuating devices are constructed, which are formed, for example, by pressure tanks with corresponding hydraulic actuating cylinders or by hydraulically actuated lever springs.
In order to establish a friction-only connection of the at least one second friction pairing to the hub by means of the shift element, the shift element is preferably tensioned. The teeth of the hub are intended to form-fit with the shaft acting as a follower in the usual manner. Due to the displaceability of the hub relative to the friction partners, a positive-locking connection can be produced between the hub and the at least one first friction partner by this displacement, wherein external teeth of the hub engage in corresponding internal teeth on the at least one friction partner, for example as a result of the displacement.
That is, the friction clutch transmits torque only in a friction fit manner in the case of torque below the limit torque, and transmits torque in a friction fit and form fit manner in the case of exceeding the limit torque. If the limit torque is again undershot, the positive-locking connection is released and the torque transmission takes place again only in a friction-fit manner.
Preferably, the switching member includes a plate spring disposed at an angle, which applies a switching force in a switching direction related to a torque to the hub portion. Alternatively, the switching member includes an inclined portion that applies a switching force in the switching direction, which is related to the torque, to the hub portion.
In both solutions, torque-dependent forces are generated in the direction of the rotational axis, i.e. in the axial direction, on the basis of the angle present (angle of the leaf spring or angle of the inclined portion), which ultimately results in a form-fitting connection between the hub portion and the at least one first friction pair. In order to define the limit torque accurately, a spring member, in particular a disc spring, is preferably constructed which applies a counter force to the hub portion against the switching direction. If the switching force exceeds the counter force, the hub is displaced in the direction in which the switching force acts. Since the switching force is torque dependent, the limit torque can be defined thereby. If the switching force drops until its absolute value is smaller than the counter force, the positive-fit torque transmission is ended.
Preferably, the positive-fit connection is established by corresponding teeth on the hub and the at least one first friction pair. In particular, the hub has an external toothing and the at least one first friction pair has a corresponding internal toothing. If the outer teeth are not perfectly aligned with the inner teeth, then the slip present in the system achieves alignment of the teeth.
Preferably, the at least one second friction pair comprises at least one clutch plate. Preferably, the at least one first friction pair comprises a pressure plate. Preferably, a friction-fit connection is formed between the hub and the hold-down plate.
The invention further relates to a hybrid module comprising an electric motor and a friction clutch as described above. In particular, friction clutches are used as separating clutches (or K0 clutches). The hybrid module preferably has a coaxial design, wherein the electric motor and the friction clutch are designed coaxially, wherein the rotor of the electric motor surrounds the friction clutch. Alternatively, the following technical solutions are preferably adopted: the friction clutch is designed in a shaft-parallel manner with the electric motor, and the electric motor drives a pulley which surrounds the friction clutch.
The details and advantages referred to with regard to the friction clutch also apply to the hybrid module and vice versa.
For the sake of completeness, it is pointed out that the terms "first", "second", etc. are used herein primarily (only) to distinguish a plurality of similar objects, dimensions or processes, i.e. in particular not to compulsorily specify the mutual association and/or order of such objects, dimensions or processes. If associations and/or orderings are desired, such associations and/or orderings will be explicitly described herein or will be apparent to those of skill in the art in view of studying the specific technical solutions.
Drawings
The present invention and the technical field will be described in detail with reference to the accompanying drawings. It is to be noted that the invention is not limited to the embodiments shown. Unless explicitly stated otherwise, in particular some aspects of the facts illustrated in the drawings may also be extracted and combined with other constituents and recognitions in the description and/or the drawings. It is to be noted in particular that the figures and in particular the dimensional relationships shown are merely schematic. The same reference numerals denote the same objects, and explanations in other drawings may be used as supplements as appropriate. Wherein:
FIG. 1 is a longitudinal cross-sectional view of an exemplary hybrid module including a friction clutch;
FIG. 2 is a cut-away perspective view of an example friction clutch, partially in a first operating condition;
FIG. 3 is a schematic illustration of the friction clutch example according to FIG. 2 partially in a second operating state;
FIG. 4 is a schematic view of a first example of a motor vehicle incorporating a friction clutch, an
Fig. 5 is a schematic view of a second example of a motor vehicle including a hybrid module.
Detailed Description
Fig. 1 is a schematic longitudinal section through a hybrid module 1 for a drive train of a motor vehicle. The hybrid module 1 includes an electric motor 2 having a stator 3 and a rotor 4. Radially inside the electric motor 2, and in particular radially inside the rotor 4, a friction clutch 5 is provided, which serves as a separating clutch or K0 clutch. This means that an internal combustion engine, not shown, can be coupled and decoupled by means of the friction clutch 5.
In the present example, the friction clutch 5 comprises a counter plate 13, two clutch plates 9, a first displaceable plate 10 (intermediate plate 11) and a second displaceable plate 12 (pressure plate 8). The clutch plate 9 forms a second friction pair 26, and the two displaceable plate parts 10, 12 (intermediate plate 11 and pressure plate 8) form a first friction pair 25. Wherein the first and second friction pairs 25, 26 are arranged alternately in the direction of the rotational axis 16 of the friction clutch 5. The displaceable plates 10, 12 are connected to the clutch input.
If the friction clutch 5 is engaged, the displaceable plate elements 10, 12 are displaced in the actuating direction 15. The clutch plates 9 have a common clutch plate flange 20 (see in particular fig. 2 and 3 for this purpose), which allows a movement of the clutch plates 9 relative to one another in the direction of the axis of rotation 16. The clutch plate 9 has a friction lining 17. By displacement of the displaceable plate elements 10, 12 and the clutch disc 9 in the actuating direction 15 relative to the counter plate 13, a friction fit is formed and a torque is transmitted in a friction fit between the counter plate 13, the clutch disc 9 and the displaceable plate elements 10, 12.
As shown in particular in fig. 2 and 3, the friction clutch 5 also has a hub 18 serving as the clutch output, which has teeth 19 by means of which torque is transmitted to a shaft body, for example an intermediate shaft body. The clutch plate flange 20 is not directly connected to the hub 18, but rather a leaf spring pack 21 is provided which serves as a switching member 27, by means of which torque can be transmitted to the hub 18. In the case shown in fig. 2, the torque is transmitted only in a friction-fit manner, and in the case shown in fig. 3, the torque to be transmitted already exceeds a predefinable limit torque and is transmitted in a friction-fit and form-fit manner.
Fig. 2 shows: torque is transmitted from the clutch plate flange 20 to the hub 18 by the leaf spring pack 21 in a friction-only fit. Wherein the outer profile of the leaf spring set 21 and the hub 18 form an oblique angle. At the same time, the set of leaf springs 21 generates a switching force in a switching direction 28, which is oriented in the axial direction relative to the axis of rotation 16 (see fig. 1) and which works in opposition to the counter force exerted by a spring member 29 provided as a disc spring 22. Wherein said switching force is torque dependent due to the oblique (i.e. not right angle) orientation of the set of leaf springs 21. The hub 18 has external teeth 23 which interact with internal teeth 24 of the counter plate 8 to form a positive-locking connection 14. However, in the situation shown in fig. 2, the limit torque is not exceeded, so that there is no form-fitting connection between the external toothing 23 and the internal toothing 24. Wherein the limit torque is defined by a balance between the torque-dependent switching force and the counter force.
If the limit torque is exceeded, the torque-dependent switching force of the switching member 27 is greater than the counter force of the disc spring 22 and the hub 18 is moved by the leaf spring set 21, so that a form fit is formed between the external toothing 23 of the hub 18 and the internal toothing 24 of the pressure plate 8. This establishes the positive-locking connection 14 between the hub 18 and the first friction partner 25 (pressure plate 8). In this case, the torque is transmitted both by the clutch plate 9 to the hub 18 in a friction-fit manner and by the pressure plate 8 to the hub 18 in a form-fit manner.
Torque can be transmitted in a friction-fit manner in both directions between the hub 18 and the clutch plate 9, whereas the positive-fit transmission takes place in only one direction. In the opposite direction, the leaf spring set 21 works against the axial stop 35. In the present embodiment, the friction clutch 5 is designed as follows: in the traction direction, i.e. in the case of torque transmission from the internal combustion engine or the electric motor 2, torque can be transmitted in a friction-fit and form-fit manner, whereas in the propulsion direction torque can be transmitted only in a friction-fit manner, since the torque transmitted in the traction mode is generally greater than in the propulsion mode.
The disc spring 22 is constructed as follows: in the case of an overshoot of the equilibrium, i.e. a switching force greater than the counter force, the counter force is relatively reduced to a large extent. Wherein the switching force is substantially linearly related to the displacement travel of the leaf spring 21, while the counter force is reduced to a greater extent, so that a larger displacement travel is achieved after exceeding the equilibrium, which is used to establish the form fit.
Fig. 4 shows a first example of a motor vehicle 30 comprising a drive train 31. The drive train comprises a drive motor 32 (here an internal combustion engine), a friction clutch 5, a transmission 33 and at least one driven wheel 34. This produces torque by means of the drive motor 32 and is transmitted via the friction clutch 5 and the transmission 33 to at least one driven wheel 34. Optionally, at least one electric motor can also be built into the drive train 31.
Fig. 5 shows a second example of a motor vehicle 30, which comprises a drive train 31, here hybrid. The drive motor 32, which is designed as an internal combustion engine, is connected to the hybrid module 1, which also comprises the electric motor 2 in addition to the friction clutch 5. The hybrid module 1 is connected to a transmission 33, and the transmission 33 is connected to at least one driven wheel 34.
List of reference numerals
1 mixing module
2 electric motor
3 stator
4 rotor
5 Friction clutch
8 pressure strip
9 Clutch disc
10 first displaceable plate
11 middle plate
12 second displaceable plate
13 back pressure plate
14 form-fitting connection
15 steering direction
16 rotating shaft
17 Friction lining
18 hub
19 teeth
20 clutch plate flange
21 leaf spring group
22 disc spring
23 external tooth
24 inner teeth
25 first friction pair
26 second friction pair
27 switching member
28 switching direction
29 spring member
30 motor vehicle
31 drive train
32 driving motor
33 speed variator
34 driven wheel
35 stop

Claims (9)

1. A friction clutch (5), in particular a friction clutch (5) for a drive train (31) of a motor vehicle (30),
having a rotating shaft (16),
comprising at least one first friction pair (25) and at least one second friction pair (26),
wherein, in order to establish a friction fit between the at least one first friction pair and the at least one second friction pair, the first friction pair (25) and the second friction pair (26) are displaceable relative to each other and relative to the counter plate (13) in the direction of the axis of rotation (16),
wherein the at least one first friction partner (25) is connected to the clutch input and the at least one second friction partner (26) is connected to the clutch output,
wherein the clutch output is designed as a hub (18) with teeth (19) for connection to a shaft body,
it is characterized in that the preparation method is characterized in that,
the at least one second friction pair (26) is connected to the hub (18) by means of a shift element (27) in a friction-fit-only manner for transmitting a torque, and the shift element (27) is suitable and designed for establishing a form-fitting connection (14) between the hub (18) and the at least one first friction pair (25) by displacing the hub (18) in the direction of the rotational axis (16) if a predefinable limit torque is exceeded.
2. The friction clutch (5) according to claim 1, wherein the switching member (27) comprises a leaf spring (21) arranged at an angle, which leaf spring applies a switching force in a switching direction (28) to the hub (18) in relation to the torque.
3. The friction clutch (5) according to claim 1, wherein the switching member (27) includes an inclined portion that applies a switching force in a switching direction (28) related to torque to the hub portion (18).
4. The friction clutch (5) according to claim 2 or 3, wherein a spring member (29) is provided, which applies a counter force to the hub (18) opposite to the switching direction (28).
5. Friction clutch (5) according to claim 4, wherein the spring member (29) is designed as a disc spring (22).
6. Friction clutch (5) according to one of the preceding claims, wherein the positive-fit connection (14) is established by means of corresponding teeth (23, 24) on the hub (18) and on the at least one first friction pair (25).
7. Friction clutch (5) according to one of the preceding claims, wherein the at least one second friction pair (26) comprises at least one clutch plate (9).
8. Friction clutch (5) according to one of the preceding claims, wherein the at least one first friction pair (25) comprises a pressure plate (8).
9. Hybrid module (1) comprising an electric motor (2) and a friction clutch (5) according to any one of the preceding claims.
CN202110172198.1A 2020-02-17 2021-02-08 Friction clutch for the friction-and form-fitting transmission of torque Pending CN113266653A (en)

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DE102020104023.7 2020-02-17

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DE102020114798B3 (en) 2020-06-04 2021-07-01 Schaeffler Technologies AG & Co. KG Friction clutch for the frictional and positive transmission of torque
DE102021115730B3 (en) 2021-06-17 2022-09-29 Schaeffler Technologies AG & Co. KG Clutch disc with integrated actuation device for positive or frictional support; coupling device; and hybrid module
DE102022104526A1 (en) * 2022-02-25 2023-08-31 Schaeffler Technologies AG & Co. KG Switching element for frictional and positive transmission of torque

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DE102007036097A1 (en) 2007-08-01 2009-02-05 Zf Friedrichshafen Ag Load switching element
DE102018122385A1 (en) 2018-09-13 2020-03-19 Schaeffler Technologies AG & Co. KG Friction clutch

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