Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D43/00—Automatic clutches
  • F16D43/02—Automatic clutches actuated entirely mechanically
  • F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
  • F16D43/06—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating axially a movable pressure ring or the like
  • F16D43/08—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating axially a movable pressure ring or the like the pressure ring actuating friction plates, cones or similar axially-movable friction surfaces
  • F16D43/10—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating axially a movable pressure ring or the like the pressure ring actuating friction plates, cones or similar axially-movable friction surfaces the centrifugal masses acting directly on the pressure ring, no other actuating mechanism for the pressure ring being provided
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D13/00—Friction clutches
  • F16D13/22—Friction clutches with axially-movable clutching members
  • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
  • F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D13/00—Friction clutches
  • F16D13/58—Details
  • F16D13/60—Clutching elements
  • F16D13/64—Clutch-plates; Clutch-lamellae
  • F16D13/648—Clutch-plates; Clutch-lamellae for clutches with 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
  • F16D43/00—Automatic clutches
  • F16D43/02—Automatic clutches actuated entirely mechanically
  • F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
  • F16D43/06—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating axially a movable pressure ring or the like
  • F16D43/08—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating axially a movable pressure ring or the like the pressure ring actuating friction plates, cones or similar axially-movable friction surfaces
  • F16D43/12—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating axially a movable pressure ring or the like the pressure ring actuating friction plates, cones or similar axially-movable friction surfaces the centrifugal masses acting on, or forming a part of, an actuating mechanism by which the pressure ring can also be actuated independently of the masses
• • 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
  • F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
  • F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
  • F16D43/18—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members with friction clutching members

Definitions

• the invention relates to a friction clutch for a drive train of a motor vehicle with a rotatably mounted about an axis of rotation, the engine side input part and frictionally connected thereto by friction partners to form a friction frictionally connectable gearbox-side output part, wherein the friction partners are formed by at least one centrifugally controlled actuator axially gegenei- nander clamped ,
• centrifugal clutches are known as so-called centrifugal clutches, which are open at low centrifugal force of the rotating about the axis of friction clutch, for example, at idle speed of an engine of the drive train and close with increasing speed and thus increasing centrifugal force.
• Such friction clutches are known for example from two-wheeled vehicles.
• the friction clutch is used as a starting clutch with a centrifugally dependent switching, arranged between the input part of the friction clutch and the Reibpartnern actuator by means of radially along a ramp device displaced flyweights axial loading of the friction partners.
• Such friction clutches can be combined with an automated transmission, for example a continuously variable transmission (CVT).
• CVT continuously variable transmission
• the friction clutch closed by the centrifugal force-dependent actuating device does not close under centrifugal force until the engine has a comparatively high rotational speed in order to be able to provide a corresponding starting torque.
• the friction clutch opens at correspondingly high speeds, so that at low speeds above the idle speed no torque of the engine is still available when the motor vehicle is still running.
• the object of the invention is the advantageous development of a friction clutch.
• the object of the invention is to extend the usable torque band when the motor vehicle is moving to smaller speeds of rotation of the engine without reducing the starting torque.
• the proposed friction clutch is provided for a drive train of a motor vehicle.
• the friction clutch includes a rotatable about a rotation axis arranged, motor-side input part and a frictionally connected by means of friction partners to form a frictional connection, gear side outgoing part.
• friction partners are associated with the input part and the output part, which are axially braced against each other by means of at least one centrifugal force-controlled actuating device.
• a motor-side and in addition between the input part and the friction partners a transmission-side actuator is provided between the input part and the friction partners in a conventional manner. Both actuators act on the friction partners with an axial force to form a frictional connection dependent on centrifugal force.
• the friction clutch is dependent on centrifugal force, ie depending on the speeds of the engine and the transmission and returning the drive wheels or closed, or remains closed until, for example, at idle speed and substantially stationary motor vehicle, the friction clutch is opened again.
• the friction clutch can be closed only at comparatively high speeds and thus for a speedy start-up sufficient power. Due to the additional action on the friction partners when the motor vehicle is moving by means of the transmission-side actuating device, the friction clutch remains closed up to rotational speeds below the clutch rotational speed during the starting process or transmits torque at least during a slip operation.
• the actuators may be connected in parallel. This means that the actuators are nested and exert a common axial force on the friction partners.
• one of the actuating devices for example the transmission-side actuating device, act directly on the friction partners while the other actuating device, for example the motor-side actuating device, acts on the friction partners. tion, acts on the directly acting actuator.
• the actuators may be connected in series with each other. This means that each of the actuators acts directly on the friction partners.
• an additional, operable by a driver disengagement device may be provided for actuating the friction clutch closed under centrifugal force.
• the actuators suppress the friction clutch under the action of centrifugal force and during the closed operation by means of the disengaging device, the torque transmitted via the friction clutch is interrupted, for example, to perform a shifting operation in the transmission.
• the disengaging device may be automatically actuated as an alternative to an operation by a driver or may be provided with a driver assistance auxiliary power operation.
• the proposed friction clutch can be formed as a dry friction clutch with an axially fixed counter-pressure plate and a pressure plate that can be displaced axially relative to it, forming the friction frictional partners on the input side to form the input part.
• the output side friction partners are formed as friction linings of a clutch disc, which forms the output part of the friction clutch. Under the influence of centrifugal force, the actuators tension the pressure plate to form a frictional connection between the friction partners against the counterpressure plate.
• the proposed friction clutch can be operated wet, wherein the friction partners are formed of alternately layered lamellae, which are biased by the actuators under the influence of centrifugal force against an axial stop.
• Steel lamellae can alternately be fitted with friction lamellae. be layered and form a corresponding disk set.
• the disk set of the actuating means by means of a relative to an axially fixed base plate axially displaceable and rotationally coupled disk carrier can be designed to be centrifugally dependent biased.
• the actuators can each comprise two radially displaceable flyweights forming a ramp device between disc parts, each of which has a disk part axially fixed and the other disk part axially displaceable, and the axially displaceable disk parts act on the disk carrier axially against the base plate.
• the axially displaceable disk parts of the ramp devices can be connected axially fixed in both directions with a disk carrier.
• the axially displaceable disc parts can act on the disk carrier against the action of at least one spring element, so that a balance between the Federvorspan- tion of the spring element and the centrifugal force is effective, the disk part so under centrifugal force the friction clutch against the action of the spring element engages.
• the axially displaceable disk parts can be arranged so that they are rotationally coupled to one another, wherein one of the disk parts, preferably the disk part of the transmission-side actuating device, tion axially loaded the plate carrier.
• the axially displaceable disc part of the motor-side actuator presses it under centrifugal force axially and, for example by means of a needle bearing or the like dreenktkoppelt on the axially displaceable disc part of the transmission-side actuator with an axially deflected by the radially displaced flyweight and the ramp device axial force.
• the two axially displaceable disk parts may act on the disk carrier directly, that is to say serially axially.
• the ramp devices can be formed by pre-stamped disc parts with radially outwardly converging ramps, between which axially distributed over the circumference arranged flyweights are provided.
• the ramps may have a radial guide along their radial extent.
• the flyweight can be designed as a rolling body such as balls, cylinders, sliding body or the like.
• Figures 1 and 2 modified friction clutch with serial arrangement of the actuators
• Figure 4 shows a section through a friction clutch with two actuators without disengaging
• FIG. 5 shows a diagram of the mode of operation of the friction clutch of FIGS. 1 to 4.
• Figures 1 and 2 show in the overall view about the rotational axis d rotatably arranged friction clutch 1 in section and in a sectional 3D representation with the input part 2 and the output part 3.
• the input part 2 has the hub on the part 4 axially fixed and by means of the rolling bearing 6 as axial bearings rotatably supported input-side plate carrier 5, which is rotatably driven radially outward by means of the ring gear 7, for example, from a prime mover of a motor.
• the disk carrier 5 forms as disk part 45 with the disk part 8 and distributed over the circumference arranged flyweights 9, the ramp device 10, thereby forming the motor-side actuator 1 1.
• the disk carrier 5 leads by means of the stampings 12, the flyweights 9 in the circumferential direction and radially displaceable.
• the disk part 8 has radially outward axially on the radial, a disc paragraph or a disk part forming approach of the disk carrier 5 tapered ramps 13, so that under the influence of centrifugal force of the rotation axis d rotating friction clutch 1, the flyweights are displaced radially outward and the Disk part 8 is axially displaced under axial support on the axially supported on the hub part 4 disk carrier 5.
• the disk carrier 5 receives the friction partners 18 designed as friction disks 17 in a rotationally fixed and axially displaceable manner. These form in alternating lamination with the output side friction partners 20 designed as steel lamellae 19, the disk set 21.
• the output part 3 is constructed as follows:
• the steel plates 19 are radially inwardly rotatably and axially limited displaceable received on the plate carrier 22, for example, mounted.
• the plate pack 21 is axially supported on the output-side base plate 24 and is acted upon axially by the pressure plate 23 connected to the plate carrier 22.
• the base plate 24 takes by means of distributed over the circumference arranged bolt 25 axially spaced the hub disc 26 firmly.
• the hub disc 26 is received by means of the pressure ring 27 fixed to the hub part 4 and forms with the transmission input shaft 28 a rotational connection.
• the disk part 29 is connected by means of distributed over the circumference arranged bolt 30 axially spaced with the hub disc 26.
• the disk carrier 22 is rotationally fixedly and axially displaceably connected to the hub disk 26 by means of the blade spring 31 distributed over the circumference, so that upon formation of a frictional engagement of the friction partners 18, 20, a torque introduced into the input part 2 via the disk carrier 22 and the pressure pot 23 is transmitted to the hub disc 26 and thus to the transmission input shaft 28.
• the disk part 32 is biased axially relative to the pressure pot 23 by means of the circumferentially distributed bolts 33 and the spring elements 34 - here helical compression springs.
• the axially fixed disc part 29 and the axially against the action of the spring elements 34 displaceable disc part 32 take axially between them distributed over the circumference arranged and the radially displaceable flyweight 35.
• the disk part 32 has, radially on the outside, the ramps 36 running onto the disk part 29.
• the disk part 29 has embossments 40, which the centrifugal mass 35 in the circumferential direction fixed and radially displaceable lead.
• the ramp device 37 and the transmission-side actuator 38 is formed. With a speed-related increase in the centrifugal force, the flyweights 35 are displaced radially outward, so that under pressure of the spring elements 34 and the leaf springs 31 of the pressure pot 23 is axially displaced and the frictional engagement of the friction partners 18, 20 is produced.
• the actuator takes over 1 1 in this way the contact pressure of the disk set against the base plate 24.
• the flyweight 35 are accelerated radially outward, so that the pressure increases.
• An Anpressungsbegrenzung can be achieved by appropriate design of the spring elements 34, which yield axially at a predetermined Kochanpressung. If the engine speed is lowered when the motor vehicle moves, the contact pressure of the disk part 8 decreases, but the contact pressure as bias of the disk set 21 remains due to the axial displacement of the disk part 32 and bias of the pressure pot 23 until the motor vehicle reaches a corresponding speed corresponding to a predetermined speed Transmission input shaft 28 has fallen below.
• the friction clutch 1 has, in addition to the actuators 1 1, 38, the centrifugal force dependent on the friction clutch 1, the release device 41, which allows opening of the closed under centrifugal friction clutch 1.
• the release device 41 by the driver or automatically actuated in the axial direction release bearing 42, which displaces the collar 43 of the pressure pot 23 against the action of the spring elements 34 and thus caused by the actuators 1 1, 38 frictional engagement between the Reibpartnern 18, 20th dissolves.
• Figure 3 shows a modification of the friction clutch 1 of Figures 1 to 2, shown in partial section around the axis of rotation d arranged friction clutch 1 a with the input part 2a and the output part 3a.
• the motor-side as well as input-side actuator 1 1 a with the ramp device 10a and the transmission-side and output-side actuator 38a with the ramp device 37a each act serially on the plate carrier 22a.
• the actuating device 38a has the disk part 32a, which is supported axially relative to the disk part 46a of the input-side actuating device 11a by means of the spring element 47a, with the ramp 36a formed radially on the outside.
• Axially between the disk part 32a and a contact surface of the disk carrier 22a radially displaceable, distributed over the circumference arranged flyweights 35a are provided which are displaced radially outward with rotating output part 3a and thus the disk carrier 22a under axial tension of the disk set 21a against the base plate 24a shift and produce a frictional engagement of the friction partners 18a, 20a.
• An overpressing is avoided by means of the pressure springs arranged between the base plate 24a and the plate carrier 22a, corresponding to the compression springs 34 of FIGS. 1 and 2.
• the ramp device 10a of the actuator 1 1 a contains the axially fixed with the hub part 4a connected disc part 44a, which axially fixedly supports the disc part 45a of the ramp means 10a by means of the rolling bearing 6a.
• the disk part 8a with the ramp 13a is formed axially displaceable and acts on the disk part 46a by means of the rolling bearing 15a rotationally coupled. Between the disc parts 8a, 45a, the radially displaceable and distributed over the circumference arranged flyweights 9a are arranged.
• the disk part 46a is axially biased against the disk part 32a by means of the spring element 47a - in this case a disk spring.
• the disk part 46a is slidably mounted on the disk part 44a by means of the axial projection 48a and has arms 49a at the end which, after a predetermined stroke of the disk part 46a, strike the hub disk 26a.
• the actuator 1 1 a is thereby wegbe ancestral and causes a centrifugal force acting on the disk pack 21 a by means of an axially rigid connection on the disk part 36 a and the flyweight 35 a. If the output part 3a reaches a predetermined speed, the flyweights 35a displace radially outward and further tension the disk pack 21a.
• the disc part When reducing the speed at the input part 2a, for example, by gas removal from the engine, the disc part shifts back, for example, when the engine is idling from the hub disc 26a, but the disc pack 21a is biased by the actuator 32a when the motor vehicle is moving.
• FIG. 4 shows the friction clutch 1 b in a schematic sectional illustration with the input part 2 b and the output part 3 b and the input-side and motor-side actuating device 1 1 b and the output-side and transmission-side actuating device 38 b.
• the actuators 1 1 b, 38b each eccentrically on the input part 2b and the output part 3b rotatably mounted flyweights 9b, 35b are recorded, which are under centrifugal twisting force of the rotating input part 2b or output part 3b and radially outward with a Jacobreib Colour the other component - output part 3b or input part 2b - form a frictional engagement.
• FIG. 5 shows the diagram 50 of a simulation of a starting behavior of a motor vehicle of the rotational speeds n over the time t with a conventional friction clutch and the proposed friction clutch 1 of Figures 1 and 2.
• the curve 51 shows the speed of the motor and the curve 52, the speed of Transmission with a conventional friction clutch.
• the curve 53 shows the rotational speed of the engine and the curve 54 shows the rotational speed of the gearing in the proposed friction clutch.
• the engine is accelerated here to a high speed, which is activated according to curve 51, the motor-side actuator centrifugal force. Due to the start of the motor vehicle also activated transmission-side actuator, the speed of the motor is lowered due to the higher load and the synchronization point is achieved at much lower speeds of about 3600 min -1 .
• the diagram 50 can also be seen that the effect of the transmission-side actuator, as a result of the speed of the motor is lowered, already in the range of about 2000 min -1 used, so that at these speeds already a frictional engagement between the input part and output part even at inactive motor-side actuator is present. It is understood that the synchronization points of the two actuators through appropriate selection of the flyweight can be variably specified and matched.
• Ramp devicea Ramp device 8 Actuating device 8a Actuating device 8b Actuating device 9 Bolt

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
• Mechanical Operated Clutches (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=58488765

Family Applications (1)

Country Status (6)

Families Citing this family (19)

Family Cites Families (10)

• 2016
  • 2016-03-14 DE DE102016204111.8A patent/DE102016204111A1/de not_active Withdrawn
• 2017
  • 2017-03-13 JP JP2018543393A patent/JP2019508640A/ja not_active Withdrawn
  • 2017-03-13 EP EP17715390.5A patent/EP3430281A1/de not_active Withdrawn
  • 2017-03-13 CN CN201780014633.XA patent/CN108700129A/zh active Pending
  • 2017-03-13 DE DE112017001290.2T patent/DE112017001290A5/de not_active Withdrawn
  • 2017-03-13 WO PCT/DE2017/100197 patent/WO2017157385A1/de active Application Filing
  • 2017-03-13 US US16/078,984 patent/US20190048946A1/en not_active Abandoned

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