WO2012130196A1 - Crankshaft belt pulley - Google Patents
Crankshaft belt pulley Download PDFInfo
- Publication number
- WO2012130196A1 WO2012130196A1 PCT/DE2012/000190 DE2012000190W WO2012130196A1 WO 2012130196 A1 WO2012130196 A1 WO 2012130196A1 DE 2012000190 W DE2012000190 W DE 2012000190W WO 2012130196 A1 WO2012130196 A1 WO 2012130196A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transmission
- crankshaft
- crankshaft pulley
- brake
- ring gear
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
-
- 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
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
- F16H2055/366—Pulleys with means providing resilience or vibration damping
-
- 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
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
Definitions
- the invention relates to a crankshaft pulley for transmitting a torque between a crankshaft and a belt drive, with a pulley, a transmission, a clutch and / or brake device and a freewheel.
- the object of the invention is to provide a crankshaft pulley according to the preamble of claim 1, which can be operated with low noise and has a good efficiency.
- crankshaft pulley for transmitting torque between a crankshaft and a belt drive, with a pulley, a transmission, a clutch and / or braking device and a freewheel
- the crankshaft pulley comprises a switchable damping device which a damped and allows undamped operation of the transmission.
- the freewheel is arranged, for example, between a sun gear of the planetary gear and the pulley or a belt track of the crankshaft pulley.
- the freewheel can be arranged between a friction disk of the damping device and the belt pulley or belt track.
- the clutch and / or brake device which is preferably designed as a ring gear, opened and the damping device, which can be designed as a friction clutch between the ring gear and pulley / sun, preferably closed.
- the torque of the crankshaft is then transmitted to the pulley via the transmission and the blocking in this torque direction free run and the closed damping device. Negative torque surges are not transmitted by the freewheel, which extends the life of the belt drive.
- the switchable damping device the transmission can be switched without play in a so-called block circulation. In a translated operation, the transmission can be unattenuated with a normal backlash, so
- CONFIRMATION COPY play operated to increase the transmission efficiency.
- the transmission and the freewheel are arranged inside the pulley.
- the coupling and / or braking device is preferably arranged outside the pulley.
- a preferred embodiment of the crankshaft pulley is characterized in that the switchable damping device is coupled to a brake disc / clutch disc of the clutch and / or brake device to enable a switching of the damping device between the damped and the undamped operation of the transmission.
- the coupling and / or braking device for example, a ring gear of the transmission can be set to activate a transmission operation of the transmission.
- the coupling and / or braking device is preferably designed as a disc brake.
- the disc brake is preferably actuated by means of a rotationally fixed to a housing mounted caliper.
- crankshaft pulley is characterized in that the clutch and / or brake device comprises one or the brake disc which is fixedly connected to a ring gear of the transmission.
- the transmission is preferably designed as a planetary gear with a ring gear, a sun gear and planetary gears.
- the fixed connection between the ring gear and the brake disc allows for a transmission of torques.
- the fixed connection between the brake disc and the ring gear in a simple manner allows actuation of the damping device via the coupling and / or braking device.
- crankshaft pulley is characterized in that one or the ring gear of the transmission is axially displaceable in order to enable the damped and undamped operation of the transmission.
- Axial means in the direction or parallel to a rotation axis of the crankshaft pulley or the crankshaft.
- crankshaft pulley is characterized in that the switchable damping device comprises a friction disc and a counter-friction disc which can be frictionally engaged with each other to enable the damped operation of the transmission.
- the friction disc and the Jacobreibscale represent a friction clutch, which serves to turn off unwanted noise due to the backlash in the block circulation of the transmission or damp.
- the Damping device or friction clutch is preferably effective between the ring gear and a sun gear of the transmission or a pulley or belt track of the crankshaft pulley.
- crankshaft pulley is characterized in that one of the friction plates is movable relative to the other friction disc to allow the switching of the damping device. Due to the frictional engagement of the two friction discs, a damped operation of the transmission is made possible. When the two friction plates are spaced from each other, the transmission can be operated unattenuated play or play.
- One of the friction plates is for this purpose preferably movable in the axial direction relative to the other friction disc.
- crankshaft pulley is characterized in that the switchable damping device comprises a spring device, by means of which the damping device is biased into a damped or undamped operating position.
- the spring device serves to frictionally engage the friction plates.
- the spring device advantageously has a degressive characteristic, as a result of which large spring forces act only in a release region of the clutch and / or brake device. In an operating range of the clutch and / or braking device then occur rather small spring forces. This provides the advantage that the coupling and / or braking device with the damping device need not be dimensioned stronger than conventional crankshaft pulleys without damping device.
- crankshaft pulley comprises a plate spring, which is clamped in the axial direction between the crankshaft and one or the ring gear of the transmission.
- the plate spring is preferably radially inwardly supported on the crankshaft and radially outward on the ring gear.
- the coupling and / or braking device is preferably arranged axially offset from the brake disc in the spring-loaded position.
- crankshaft pulley is characterized in that the plate spring is supported radially inwardly on a bearing. Through the bearing, the plate spring is axially fixed and rotatory freely supported or suspended. Alternatively, the diaphragm spring can be firmly supported or suspended on the planet carrier and be rotatably decoupled from the ring gear via a bearing.
- Another preferred embodiment of the crankshaft pulley is characterized in that the plate spring is supported on a planet carrier of the transmission. The bearing is preferably arranged between the planet carrier and the disc spring. The planet carrier is used for storage of planet gears of the transmission and is therefore also referred to as a planet carrier.
- the transmission is arranged within the crankshaft pulley and serves, for example, to increase the torque applied by a starter generator via the belt drive to the pulley during a cold start of an internal combustion engine.
- the planet carrier is connected to the crankshaft and the sun gear connected via the freewheel with the pulley.
- the ring gear can be fixed by the coupling and / or braking device with respect to a housing, in particular a crankcase, whereby the translation from the sun gear to the planet carrier is activated.
- the damping device according to the invention preferably represents a friction clutch, which is arranged between the ring gear and the pulley or the sun gear.
- the clutch and / or brake device also referred to as a ring gear brake, is opened and the friction clutch or damping device is closed by a spring force.
- the torque of the crankshaft is transmitted to the pulley via the planet carrier, the planetary gears, inside the sun gear and through the freewheel blocking in this torque direction and externally via the closed damping device or friction clutch.
- Negative torque surges are not transmitted by the freewheel, which acts as a damping and protective effect with respect to the belt, the sun gear running in this operating state backwards.
- the gearbox runs in generator mode as a block. In an overtaking operation, the sun gear runs backwards. By braking the ring gear relative to the sun gear game-related noise and wear, which are amplified by vibration of the engine can be minimized using the damping device according to the invention.
- the spring device comprising a plate spring presses in its radially outer region on the ring gear, whereby this is displaced and the counterpart disc attached thereto is pressed against the friction disc on the sun gear or on the pulley.
- the ring gear is preferably pressed eccentrically to the clutch and / or braking device and damped the ring gear. If the coupling and / or Braking device is actuated, then the ring gear is pulled in the middle of the clutch and / or brake device, thus canceling the damping of the transmission. Wear of a housing-side brake pad is preferably compensated by the fact that the ring gear is pressed by the wear path further towards the housing, in particular the crankcase.
- Figure 1 is a schematic diagram of a crankshaft pulley according to the invention with a Ptanetengetriebe and a dry-running damping device in an operating state block circulation in section;
- FIG. 2 shows the crankshaft pulley from FIG. 1 in an operating state of translation
- Figure 3 shows a similar crankshaft pulley as in Figure 1 with a wet-running damping device in the operating state of block circulation and
- Figure 4 shows a similar crankshaft pulley as in Figures 1 to 3 with an alternately arranged freewheel in the operating state block circulation.
- crankshaft pulley 1; 61; 71 is shown in various views and according to various embodiments. The same or similar parts are provided with the same reference numerals.
- the crankshaft pulley 1; 61; 71 includes at least one belt track 40, also referred to as a pulley, for example, for coupling a belt of a belt drive to a belt starter generator and / or at least one accessory, such as an air conditioning compressor.
- the crankshaft pulley 1; 61; 71 is mounted in a drive train of a motor vehicle, as disclosed for example in German Patent Application DE 10 2007 021 233 A1, by means of a mounting screw to a crankshaft 2, which is rotatable about a rotation axis 26.
- the motor vehicle may be a hybrid vehicle with an internal combustion engine and an electric machine.
- the crankshaft pulley 1 is associated with a brake device 28 which comprises at least one brake caliper 3, 20.
- the calipers 3, 20 are arranged diametrically. It is also possible for three or more brake calipers to be distributed uniformly on the circumference of a brake disk 7.
- Each of the calipers 3, 20 comprises at least one brake piston 4 and brake pads 5, 6.
- a planetary gear 21, a Tilger pleased with a damper 22 and a freewheel 23 are integrated.
- the pulley 1 comprises a radial flange 30 which rotatably connects the belt track 40 with a sun gear 32 of the transmission 21, which is designed as a planetary gear.
- the planetary gear 21 includes, in addition to the sun gear 32, planet gears 34 that engage both the sun gear 32 and a ring gear 36.
- the planet gears 34 are rotatably mounted on a planet carrier 35.
- a damper mass of the absorber 22 is attached to the planet carrier with the interposition of a rubber track.
- the ring gear 36 is rotatably connected to the brake disc 7 of the brake device 28.
- the planetary gear 21 with the sun gear 32, the planetary gears 34 and the ring gear 36 is encapsulated by partitions 38, 39.
- the dividing walls 38, 39 extend substantially in the radial direction and serve to prevent an undesired escape of lubricating medium, which serves to lubricate the planetary gear 21, from the crankshaft pulley 1.
- the dividing walls 38, 39 are designed, for example, as sheet metal parts. Radially inside sealing means, such as shaft seals, are provided between the dividing walls 38, 39 and parts rotating relative thereto.
- the brake disk 7 extends radially outward from the ring gear 36 of the planetary gear 21, where it can be clamped between the brake pads 5, 6 of the brake device 28.
- the brake pads 5, 6 can be actuated via the brake piston 4 in the brake caliper 3, 20.
- the brake device 28 is opened, that is, the brake pads 5, 6 are spaced from the brake disk 7.
- the brake piston 4 is actuated, for example hydraulically, then it moves towards the brake pads 5, 6 in order to clamp the brake disc 7 between the brake pads 5, 6.
- the brake disc 7 is rotatably connected to the crankcase 44, that is, the brake disc 7 stands still.
- the freewheel 23 comprises an inner ring, which is non-rotatably connected to the sun gear 32.
- the freewheel 23 further comprises an outer ring which is non-rotatably connected to the pulley 40 of the planetary gear 21.
- the arrangement of inner and outer ring can also be reversed.
- Freewheel bodies are arranged between the inner ring and the outer ring.
- the inner ring of the pulley freewheel 23 is connected to the sun gear 32.
- the planet carrier 35 extends from the crankshaft 2 stepped radially outward. Radially outward, the planet gears 34 are rotatably mounted on the planet carrier 35.
- the switchable damping device 50; 62; 74 is a friction clutch with a friction disc 51; 63; 75 and a Jacobreibscale 52; 64; 76 executed.
- the switchable damping device 50; 62; 74 is switched via the brake disk 7 of the braking device 28.
- the ring gear 36 of the planetary gear 21 is fixed to the brake disc 7 of the braking device 28, which is also referred to as Hohlradbremse connected.
- the friction disc 51 is fixedly connected to the belt track or pulley 40.
- the Jacobreibscale 52 is fixedly connected to the ring gear 36.
- a spring device 54 which includes a plate spring 55, the two friction plates 51; 52 biased in a block circulation operation of the crankshaft pulley 1 shown in Figure 1 in frictional engagement.
- the plate spring 55 is clamped between a bearing 56, which is attached to the planetary carrier 35, and a stop 57, which is provided on the ring gear 36.
- FIG. 2 shows that the damping device or friction clutch 50 is opened during actuation, that is to say closing, of the brake device 28.
- the brake disc 7 in Figures 1 and 2 to the right By a movement of the brake disc 7 in Figures 1 and 2 to the right, the counter-friction disc 52 is moved away from the friction disc 51.
- the two friction plates 51, 52 are spaced from each other.
- the translation of the planetary gear 21 is activated.
- the gears 32; 34 and 36 of the planetary gear 21 are play with each other engaged.
- the damping device 50 is arranged outside a wet space which is delimited by the separating walls 38, 39.
- the planetary gear 21 is disposed in the wet room and is lubricated with, for example, a lubricating medium such as oil or grease.
- the damping device 62 together with the planetary gear 21, is arranged in a wet space bounded by the dividing wall 38 and a dividing wall 69.
- the friction disc 63 is connected by a connecting web 65 fixed to the radial flange.
- the connecting web 65 is designed as a sleeve. Radially outward on the sleeve, the partition 69 is located with the interposition of a suitable sealing device, such as a shaft seal on.
- the absorber device comprises absorber masses 72, which are arranged in the circumferential direction between the planetary gears 34 of the planetary gear 21.
- a freewheel 73 is connected between the damper 74 and the radial flange of the pulley or belt track 40.
- the freewheel 73 is rotatably connected to the radial flange 30 on one side.
- On the other side of the freewheel 73 is connected to the friction plate 75.
- the Jacobreibscale 76 is fixedly connected to the ring gear 36.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112012001522T DE112012001522A5 (en) | 2011-03-28 | 2012-02-28 | Crankshaft pulley |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011015267.9 | 2011-03-28 | ||
DE102011015267 | 2011-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012130196A1 true WO2012130196A1 (en) | 2012-10-04 |
Family
ID=46017732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2012/000190 WO2012130196A1 (en) | 2011-03-28 | 2012-02-28 | Crankshaft belt pulley |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE112012001522A5 (en) |
WO (1) | WO2012130196A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012218668B4 (en) * | 2012-10-12 | 2021-01-21 | Schaeffler Technologies AG & Co. KG | Method for controlling a pulley generator |
DE102013022010A1 (en) * | 2013-12-20 | 2015-06-25 | Geräte- und Pumpenbau GmbH | Device for driving ancillaries of an internal combustion engine of motor vehicles |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3622335A1 (en) * | 1985-07-31 | 1987-02-05 | Volkswagen Ag | Drive device for auxiliary units of an internal combustion engine |
US4800780A (en) * | 1985-12-17 | 1989-01-31 | G.E. Machine Tool Limited | Accessory transmission |
EP0346743A2 (en) * | 1988-06-11 | 1989-12-20 | Pierburg Gmbh | Adjustable driving apparatus and method of controlling it |
DE4103213A1 (en) * | 1990-02-06 | 1991-08-08 | Luk Lamellen & Kupplungsbau | Pulley for belt driven engine accessories - has two parts connected by springs to absorb torsional vibration |
DE19830826A1 (en) * | 1997-07-11 | 1999-02-04 | Exedy Corp | Dynamic damper assembly for clutch mechanism in motor vehicle |
GB2337566A (en) * | 1998-05-19 | 1999-11-24 | Daimler Chrysler Ag | Planetary variable speed auxiliary drive with vibration isolator |
DE10148961A1 (en) * | 2000-10-12 | 2002-04-18 | Luk Lamellen & Kupplungsbau | Transmission system between the engine output shaft of a motor vehicle and an electric machine incorporates transmission stages which are switchable by at least one belt freewheeling unit |
DE102007021233A1 (en) * | 2006-05-17 | 2007-11-22 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Drive train for use in e.g. motor vehicle, has electrical machine operable as generator in mode of operation and as motor in another mode of operation, and transmission unit with override clutches operating in opposite directions |
WO2009121188A1 (en) * | 2008-04-04 | 2009-10-08 | Litens Automotive Partnership | Auto-selecting two-ratio transmission |
DE102009039989A1 (en) * | 2008-09-15 | 2010-04-15 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Belt pulley for diverting mechanical energy of internal combustion engine in motor vehicle, has spring damper device fixed between access part and output part, where leaf spring of damper device damps rotational vibration |
US20100259121A1 (en) * | 2007-10-26 | 2010-10-14 | Denso Corporation | Power transmission device |
-
2012
- 2012-02-28 DE DE112012001522T patent/DE112012001522A5/en not_active Withdrawn
- 2012-02-28 DE DE201210202991 patent/DE102012202991A1/en not_active Withdrawn
- 2012-02-28 WO PCT/DE2012/000190 patent/WO2012130196A1/en active Application Filing
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3622335A1 (en) * | 1985-07-31 | 1987-02-05 | Volkswagen Ag | Drive device for auxiliary units of an internal combustion engine |
US4800780A (en) * | 1985-12-17 | 1989-01-31 | G.E. Machine Tool Limited | Accessory transmission |
EP0346743A2 (en) * | 1988-06-11 | 1989-12-20 | Pierburg Gmbh | Adjustable driving apparatus and method of controlling it |
DE4103213A1 (en) * | 1990-02-06 | 1991-08-08 | Luk Lamellen & Kupplungsbau | Pulley for belt driven engine accessories - has two parts connected by springs to absorb torsional vibration |
DE19830826A1 (en) * | 1997-07-11 | 1999-02-04 | Exedy Corp | Dynamic damper assembly for clutch mechanism in motor vehicle |
GB2337566A (en) * | 1998-05-19 | 1999-11-24 | Daimler Chrysler Ag | Planetary variable speed auxiliary drive with vibration isolator |
DE19822426A1 (en) * | 1998-05-19 | 1999-11-25 | Daimler Chrysler Ag | Planetary variable speed auxiliary drive for use with an internal combustion engine |
DE10148961A1 (en) * | 2000-10-12 | 2002-04-18 | Luk Lamellen & Kupplungsbau | Transmission system between the engine output shaft of a motor vehicle and an electric machine incorporates transmission stages which are switchable by at least one belt freewheeling unit |
DE102007021233A1 (en) * | 2006-05-17 | 2007-11-22 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Drive train for use in e.g. motor vehicle, has electrical machine operable as generator in mode of operation and as motor in another mode of operation, and transmission unit with override clutches operating in opposite directions |
US20100259121A1 (en) * | 2007-10-26 | 2010-10-14 | Denso Corporation | Power transmission device |
WO2009121188A1 (en) * | 2008-04-04 | 2009-10-08 | Litens Automotive Partnership | Auto-selecting two-ratio transmission |
DE102009039989A1 (en) * | 2008-09-15 | 2010-04-15 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Belt pulley for diverting mechanical energy of internal combustion engine in motor vehicle, has spring damper device fixed between access part and output part, where leaf spring of damper device damps rotational vibration |
Also Published As
Publication number | Publication date |
---|---|
DE102012202991A1 (en) | 2012-10-04 |
DE112012001522A5 (en) | 2013-12-24 |
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