Actuation device for a clutch device

Abstract

An actuation device for a clutch device is provided having a magnetic field brake with a brake stator and a brake rotor. This magnetic field brake can be operated as an eddy-current brake and/or as a hysteresis brake.

Claims

1. An actuation device for a clutch device, the actuation device comprising a magnetic field brake with a brake stator and a brake rotor, the magnetic field brake is operated as an eddy-current brake and as a hysteresis brake, wherein the brake rotor comprises a first rotor section made from a first material and a second rotor section made from a second material, the first material has a higher electric conductivity than the second material, the second material is a magnetically semi-hard material, the first rotor section is a carrier for the second rotor section and the first rotor section has a cup-shaped profile including a radially inner hub defining a gear, and the second rotor section is a flange extending cantilevered from a radially outer region of the first rotor section.

2. The actuation device according to claim 1, wherein the second rotor section has an annular form and is compressed with the first rotor section.

3. The actuation device according to claim 1, wherein the brake stator comprises an internal stator with a central coil and an external stator without a coil.

4. The actuation device according to claim 3, wherein the brake rotor has a cup-shaped form with a floor section and a wall section and the wall section is arranged between the internal stator and the external stator.

5. The actuation device according to claim 3, wherein the internal stator comprises a first claw terminal with first terminal claws and a second claw terminal with second terminal claws the central coil is encompassed by the first claw terminal with the first terminal claws and the second terminal claws with the second terminal claws and the external stator has a flat-annular form.

6. The actuation device according to claim 3, wherein the brake stator comprises a first claw terminal with a first terminal claw forming the external stator, and a second claw terminal with second terminal claws forming the internal stator, and the central coil is encompassed by the second claw terminal with the second terminal claws.

7. The actuation device according to claim 1, wherein the second material has a higher magnetic conductivity than the first material.

8. The actuation device according to claim 1, wherein the second material is a non-magnetized permanent magnetic material.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, exemplary embodiments of the invention are described in greater detail with reference to the figures. Additional features and advantages are discernible from this description. Concrete features of these exemplary embodiments may represent general features of the invention. Features connected to other features of these exemplary embodiments may also represent individual features of the invention.

(2) Shown schematically and as an example are:

(3) FIG. 1 a drive train of a motor vehicle with a parallel full-hybrid drive and a clutch device arranged in the drive train,

(4) FIG. 2 a rotor of an electric drive engine with an integrated clutch device and actuation device for a drive train of a motor vehicle,

(5) FIG. 3 a magnetic field brake for an actuation device of a clutch device for a drive train of a motor vehicle,

(6) FIG. 4 an internal stator of a magnetic field brake for an actuation device of a clutch device for the drive train of a motor vehicle,

(7) FIG. 5 a magnetic field brake with a brake stator and a brake rotor in a perspective cross-sectional view;

(8) FIG. 6 a magnetic field brake with a brake stator and a brake rotor in a perspective cross-sectional view;

(9) FIG. 7 a magnetic rotor with a first rotor section for operating a magnetic field brake as an eddy-current brake and a second rotor section for operating the magnetic field brake as a hysteresis brake,

(10) FIG. 8 a diagram for brake momentums of a magnetic field brake during the operation as an eddy-current brake and the operation as a hysteresis brake, and

(11) FIG. 9 a diagram for magnetically semi-hard materials.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(12) FIG. 1 shows a drive train 100 of a motor vehicle, otherwise not shown in greater detail here, with a parallel full-hybrid drive and a clutch device 102 arranged in the drive train 100. The drive train 100 includes an internal combustion engine 104, a two-weight flywheel 106, the clutch device 102, an electric drive engine 108, a transmission 110, and at least one wheel 112 that can be driven. The engine 108 can be operated as a motor. The clutch device 102 is arranged in the drive train 100 between the two weight fly-wheel 106 and the electric engine 108. The clutch device 102 is arranged in the drive train 100 between the two weight flywheel 106 and the transmission 110.

(13) The clutch device 102 comprises a clutch input part 114 and a clutch output part 116. The clutch output part 114 is connected to the two weight flywheel 106. The clutch output part 116 is connected to the electric engine 108. The electric engine 108 comprises a stator 118 and a rotor 120. The clutch output part 116 is connected to the rotor 120 of the electric engine 108. The clutch output part 116 is connected to the transmission 110. The electric engine 108 is connected to the transmission 110. The rotor 120 of the electric engine 108 is connected to the transmission 110.

(14) FIG. 2 shows a rotor 200 of an electric engine, otherwise not shown in greater detail, comprising an integrated disk clutch 202, as well as a clutch device 102 according to FIG. 1, with an actuation device 204 for a motor vehicle with a hybrid drive.

(15) The rotor 200 has a rotary disk 206. The rotor 200 has a cup-like form. A cylindrical receptacle is formed in the rotor 200. The disk clutch 202 and the actuation device 204 are arranged in the receptacle. The disk clutch 202 and the actuation device 204 are arranged in the direction of extension of the axis of rotation 206 as well as in the radial direction inside the rotor 200.

(16) The disk clutch 202 has a clutch input part and a clutch output part. The clutch input part comprises internal disks, such as 208. The internal disks 208 are allocated to the driving internal combustion engine. The clutch output part comprises external disks, such as 210. The external disks 210 are connected to the rotor 200 in a torque-proof fashion. The disk clutch 202 has a pressure plate 212 and a compression plate 214. The internal disks 208 and the external disks 210 are respectively arranged alternating between the pressure plate 212 and the compression plate 214. The pressure plate 212 is connected fixed to the rotor 200. The compression plate 214 is connected to the rotor 200 in a torque-proof fashion and can be displaced axially to a limited extend in reference to the pressure plate 212. This way, the disks 208, 210 can be clamped between the pressure plate 212 and the compression plate 214. With the help of the actuation device 204 the compression plate 214 can be impinged in the closing direction of the clutch.

(17) The actuation device 204 comprises a ramp device. The ramp device comprises a ramp ring 216 with first ramps. The ramp device comprises second ramps. The second ramps are arranged at the compression plate 214. The ramp ring 216 with the first ramps can be rotated about the axis of rotation 206 in reference to the compression plate 214 with the second ramps. Balls, such as 218, are arranged between the first ramps and the second ramps. The actuation device 204 includes a freewheel device 220. The freewheel device 220 comprises an internal ring 222, an external ring 224, and blocking bodies, such as 226. A first direction of rotation of the freewheel device 220 is a blocking direction, a second direction of rotation opposite the first direction of rotation is a release direction. In the release direction the internal ring 222 and the external ring 224 are rotational in reference to each other. In the blocking direction, the blocking bodies 226 prevent any relative rotation between the internal ring 222 and the external ring 224, so that mechanical power can be transmitted. The freewheel device 220 comprises a freewheel cup 228. The freewheel cup 228 is connected fixed to an external ring 224 on the one side and to a ramp ring 216 of the actuation device 204 on the other side. The internal ring 222 is connected fixed to a shaft 230, which in turn is connected in a driving fashion to a driving internal combustion engine.

(18) When a speed of the shaft 230 exceeds a speed of the clutch output part and/or the rotor 200, the freewheel device 220 is activated in the blocking direction. Then the ramp ring 216 is rotated via the internal ring 222, the blocking bodies 226, the external ring 224, and the freewheel cup 228. The rotation of the ramp ring 216 then causes via the balls 218 an axial impingement of the compression plate 214 in the closing direction of the clutch. When the speed of the shaft 230 is slower than the speed of the clutch output part and/or the rotor 200 the freewheel device 220 is activated in the release direction. Then the compression plate 214 is not impinged and the disk clutch 202 can open.

(19) The actuation device comprises a moment sensor 232. The moment sensor 232 is arranged between the shaft 230 and the clutch input part of the disk clutch 202. The moment sensor 232 comprises a first sensor part 234 and a second sensor part 236. The first sensor part 234 and the second sensor part 236 can be rotated in reference to each other to a limited extent. The first sensor part 234 is connected to the shaft 230 in a torque-proof fashion. The second sensor part 236 is connected to the clutch input part in a torque-proof fashion. The moment sensor 236 comprises an energy storage unit, which rests on the one side on the first sensor part 234 and on the other side on the second sensor part 236. The moment sensor 232 serves to block the freewheel device 220 only as of a certain predetermined offset moment, when a speed of the shaft 230 exceeds the speed of the rotor 200. The moment sensor 232 serves to ensure the opening of the disk clutch 202, when a speed of the shaft 230 is slower than the speed of the stator 200. For the rest, additional reference is made particularly to FIG. 1 and the corresponding description.

(20) FIG. 3 shows a magnetic field brake 300 for an actuation device of a clutch device for a drive train of a motor vehicle, such as the actuation device 204 according to FIG. 2. The magnetic field brake 300 comprises a brake stator and a brake rotor 302. The brake stator comprises an internal stator 304 and an external stator 306. FIG. 4 shows the internal stator 304. The internal stator 304 comprises a first claw terminal 308 with a disk section 310 and terminal claws, such as 312. The internal stator 304 comprises a second claw terminal 314 with a disk section 316 and terminal claws, such as 318. The internal stator 304 comprises a central coil 320.

(21) The terminal claws 312 of the first claw terminal 308 are arranged at the disk section 310 radially at the outside. The terminal claws 312 of the first claw terminal 208 are each angular in reference to the disk section 310 by approximately 90 and respectively have a free, narrowly tapering end. The terminal claws 312 of the first claw terminal 308 are arranged at the disk section 310 distributed in the circumferential direction. Gaps form between the terminal claws 312 of the first claw terminal 308.

(22) The terminal claws 318 of the second claw terminal 314 are arranged radially at the outside of the disk section 316. The terminal claws 318 of the second claw terminal 314 are each angular in reference to the disk section 316 by approx. 90 and respectively have a free, narrowly tapering end. The terminal claws 318 of the second claw terminal 314 are arranged at the disk section 316 distributed in the circumferential direction. Gaps form between the terminal claws 318 of the second claw terminal 314.

(23) The first claw terminal 308 with its disk section 310 and the second claw terminal 314 with its disk section 316 are arranged at both sides of the central coil 320. The terminal claws 312 of the first claw terminal 308 and the terminal claws 318 of the second claw terminal 314 encompass the central coil 320 radially at the outside. The free ends of the terminal claws 312 of the first claw terminal 308 and the free ends of the terminal claws 318 of the second claw terminal 314 are aligned opposite each other. The terminal claws 312 of the first claw terminal 308 and the terminal claws 318 of the second claw terminal 314 alternatingly engage each other. The first claw terminal 308 and the second claw terminal 314 encompass the central coil 320 radially at the inside.

(24) The brake rotor 302 has a cup-like form with a floor section 322 and a wall section 324. The brake rotor 302 is arranged with its floor section 322 at the second claw terminal 314 and with its wall section 324 radially at the outside of the internal stator 304.

(25) The external stator 306 is embodied without coils and has a thin, flat annular form. The external stator 306 is magnetically permeable. The external stator 306 is arranged radially at the outside of the brake rotor 302.

(26) The internal stator 304 and the external stator 306 are connected fixed to a carrier part 326. The carrier part 326 has a flange section and a hub section. The carrier part 326 and the external stator 306 form a housing-like receptacle for the internal stator 304 and the brake rotor 302. The first claw terminal 308 is arranged at the flange section of the carrier part 326. The hub section of the carrier part 326 projects through a central recess of the internal stator 304. The brake rotor 302 is supported in a rotary fashion via a bearing 328 at the hub section of the carrier part 326. For the rest, additional reference is made particularly to FIGS. 1-2 and the corresponding description.

(27) FIG. 5 shows a magnetic field brake 400 with a brake stator 402 and a brake rotor 404 in a perspective cross-sectional view. The brake stator 402 has a carrier part 406, a first claw terminal 408, a second claw terminal 410, and a central coil 412. FIG. 6 shows a magnetic field brake 400 in a perspective cross-sectional view without the carrier part 406.

(28) The first claw terminal 408 comprises a first disk section 414 and external terminal claws, such as 416. The first claw terminal 408 forms an external stator. The second claw terminal 410 comprises a second disk section 418 and internal terminal claws, such as 420. The second claw terminal 410 forms an internal stator. The external terminal claws 416 are arranged radially at the outside at the first disk section 414. The external terminal claws 416 are each angular in reference to the first disk section 414 by approx. 90 and respectively have a free, narrowly tapering end. The external terminal claws 416 are arranged on the first disk section distributed in the circumferential direction. Gaps form between the external terminal claws 416.

(29) The internal terminal claws 420 of the second claw terminal 410 are arranged radially at the outside of the second disk section 418. The internal terminal claws 420 are each angular in reference to the second disk section 418 by approx. 90 and respectively have a free, narrowly tapering end. The internal terminal claws 420 are arranged at the second disk section 418 distributed in the circumferential direction. Gaps form between the terminal claws 420.

(30) The external terminal claws 416 are arranged in the circumferential direction opposite the gaps formed between the internal terminal claws 420. The internal terminal claws 420 are arranged in the circumferential direction opposite the gaps formed between the external terminal claws 416. The external terminal claws 416 are arranged radially further towards the outside than the internal terminal claws 420 in reference to the axis of rotation of the magnetic field brake 400 and/or the brake stator 402. The internal terminal claws 420 are arranged radially further inwardly than the external terminal claws 416 in reference to the axis of rotation. A circumferential annular gap is formed between the external terminal claws 416 and the internal terminal claws 420 as a magnetically effective area for the brake rotor 404.

(31) The first claw terminal 408 with the first disk section 414 and the second claw terminal 410 with the second disk section 418 are arranged at both sides of the central coil 412. The external terminal claws 416 of the first claw terminal 408 and the internal terminal claws 420 of the second claw terminal 410 encompass the central coil 412 radially at the outside. The free ends of the external terminal claws 416 and the free ends of the internal terminal claws 420 are aligned opposite each other. The first claw terminal 408 and the second claw terminal 410 encompass the central coil 412 radially at the inside.

(32) The brake rotor 404 has a cup-shaped form with a floor section 422 and a wall section. The wall section forms a wall section 424 of the brake rotor 404. The brake rotor 404 is arranged with its floor section 422 at the second claw terminal 410 and with its wall section 424 in the annular gap formed between the external terminal claws 416 and the internal terminal claws 420. The wall section 424 is arranged radially at the inside of the external terminal claws 416 and radially at the outside of the internal terminal claws 420.

(33) The first claw terminal 408 and the second claw terminal 410 are connected fixed to the carrier part 406. The carrier part 406 has a flange section and a hub section. The carrier part 406 forms a receptacle for the first claw terminal 408, the second claw terminal 410, and the brake rotor 404. The first claw terminal 408 is arranged with its first disk section 414 at the flange section of the carrier part 406. The hub section of the carrier part 406 projects through a central recess of the first claw terminal 408 and the second claw terminal 410. The brake rotor 404 is supported with the help of a bearing 426 in a rotary fashion at the hub section of the carrier part 406. The brake rotor 404 has external gears 428. For the rest, additionally reference is made particularly to FIGS. 1-2 and the corresponding description.

(34) FIG. 7 shows a brake rotor 500 with a first rotor section 502 for operating a magnetic field brake, such as a magnetic field brake 300 according to FIGS. 3-4 or a magnetic field brake 400 according to FIGS. 5-6, as an eddy-current brake and a second rotor section 504 for operating a magnetic field brake as a hysteresis brake.

(35) The first rotor section 502 has a cup-like form with a floor section 506 and a wall section 508. The brake rotor 500 has a central opening 510. The opening 510 is arranged at the floor section 506 of the first rotor section 502. The brake rotor 500 has gears 512. The gearing 512 is arranged at the outside of the opening 510. The wall section 508 has a flat-annular shape.

(36) The brake rotor 500 has an eddy-current section 514 and a hysteresis section 516. The wall section 508 of the first rotor section 502 forms the eddy-current section 514. The second rotor section 504 has a flat-annular form. The second rotor section 504 is arranged radially at the inside of the wall section 508 of the first rotor section 502. The second rotor section 504 is impressed into the first rotor section 502. The first rotor section 502 therefore serves as the carrier for the second rotor section 504.

(37) The first rotor section 502 is produced from an electrically well conducting material, such as an aluminum alloy or a copper alloy. The second rotor section 504 is made from a magnetically semi-hard material, such as an alloy of CoFeNi, CoFrV, FeCrCo, FeCrCoMo, FeCrCoNiMo, and/or AlNiCo.

(38) During the operation of the magnetic field brake as an eddy-current brake any eddy-current loss of the eddy-current section 504 moving in the magnetic field is used for the braking process. During the operation of the magnetic field brake as a hysteresis brake the effect of the magnetic field upon the moving hysteresis section 516 is utilized. For the rest, additional reference is made particularly to FIGS. 3-6 and the corresponding description.

(39) FIG. 8 shows a diagram 600 for brake moments of a magnetic field brake, such as the magnetic field brake 300 according to FIGS. 3-4 or the magnetic field brake 400 according to FIGS. 5-6, for an operation as an eddy-current brake and an operation as a hysteresis brake. In the diagram 600, on an x-axis, a speed is shown in rpm and on a y-axis a moment in Nm. The parameter 602 shows a moment progression during the operation as an eddy-current brake. The parameter 604 shows a moment progression during the operation as a hysteresis brake. The parameter 606 shows the sum of the parameters 602, 604. It is discernible that already at a speed of 0, here a brake momentum can be generated. During the operation of the magnetic field brake, here it can be switched respectively between the parameters 602, 604, 606, by way of an operation as an eddy-current brake, as a hysteresis brake, or a combination thereof. For the rest, additional reference is made particularly to FIGS. 3-7 and the corresponding description.

(40) FIG. 9 shows a diagram 700 with parameters 702, 704, 706, 708 of magnetically semi-hard materials. In the diagram 700, on an x-axis, an induction B is shown and a field strength H on a y-axis. For the rest, additional reference is made particularly to FIG. 7 and the corresponding description.

LIST OF REFERENCE CHARACTERS

(41) 100 drive train 102 clutch device 104 internal combustion engine 106 two-weight flywheel 108 electric machine 110 transmission 112 wheel 114 input part 116 output part 118 stator 120 rotor 200 rotor 202 disk clutch 204 actuation device 206 axis of rotation 208 internal disk 210 external disk 212 pressure plate 214 compression plate 216 ramp ring 218 ball 220 freewheel device 222 internal ring 224 external ring 226 blocking body 228 freewheel cup 230 shaft 232 moment sensor 234 first sensor part 236 second sensor part 300 magnetic field brake 302 brake rotor 304 internal stator 306 external stator 308 first claw terminal 310 disk section 312 terminal claw 314 second claw terminal 316 disk section 318 terminal claw 320 central coil 322 floor section 324 wall section 326 carrier part 328 bearing 400 magnetic field brake 402 brake stator 404 brake rotor 406 carrier part 408 first claw terminal 410 second claw terminal 412 central coil 414 first disk section 416 external terminal claw 418 second disk section 420 internal terminal claw 422 floor section 424 wall section 426 bearing 428 external gears 500 brake rotor 502 first rotor section 504 second rotor section 506 floor section 508 wall section 510 opening 512 gears 514 eddy-current section 516 hysteresis section 600 diagram 602 parameter 604 parameter 606 parameter 700 diagram 702 parameter 704 parameter 706 parameter 708 parameter