WO2009143958A1 - Centering feature of a flexplate to pilot the hub of a dry hybrid damper - Google Patents
Centering feature of a flexplate to pilot the hub of a dry hybrid damper Download PDFInfo
- Publication number
- WO2009143958A1 WO2009143958A1 PCT/EP2009/003313 EP2009003313W WO2009143958A1 WO 2009143958 A1 WO2009143958 A1 WO 2009143958A1 EP 2009003313 W EP2009003313 W EP 2009003313W WO 2009143958 A1 WO2009143958 A1 WO 2009143958A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flexplate
- hub
- damper
- circumferential surface
- crankshaft
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/1207—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by the supporting arrangement of the damper unit
Definitions
- the invention relates to means of centering the hub and flange assembly of a damper, in particular, a dry hybrid damper.
- the present invention broadly comprises a flexplate for centering a dry hybrid damper, including a circumferential surface arranged to engage a circumferential surface for a hub for the damper to center the hub and the flexplate and a first portion arranged to at least indirectly engage a crankshaft to center the flexplate on the crankshaft.
- the first portion includes at least one radially inwardly facing surface arranged to engage a radially outwardly facing surface on the crankshaft.
- the flexplate includes a second portion arranged for connecton with at least one cover plate for the damper.
- the circumferential surface for the flexplate is radially inwardly facing and the circumferential surface for the hub is radially outwardly facing or the circumferential surface for the flexplate is radially outwardly facing and the circumferential surface for the hub is radially inwardly facing.
- the portion arranged for connection to the crankshaft includes a plurality of features arranged to engage a plurality of protrusions on the crankshaft.
- the plurality of features includes a plurality of holes.
- the flexplate includes a radial wall arranged to engage an axial end for the hub.
- the radial wall and the circumferential surface for the flexplate are connected.
- the hub is integral to the damper.
- an outer surface of the hub and a flange for the damper are engaged.
- the present invention also broadly comprises a dry hybrid damper assembly, including: a flexplate with a radially inwardly facing circumferential surface, a first portion arranged for connection to a crankshaft, and a second portion; a hub with a radially outwardly facing circumferential surface engaged with the radially inwardly facing circumferential surface to center the hub and the flexplate; and a damper rotationally connected to the second portion of the flexplate and rotationally connected to the hub.
- the damper includes at least one cover plate connected to the second portion of the flexplate and a flange connected to the hub.
- the first portion of the flexplate includes a plurality of holes arranged to engage a plurality of protrusions on the crankshaft.
- the present invention further broadly comprises a dry hybrid damper assembly, including a flexplate with a radially outwardly facing circumferential surface and a portion arranged for connection to a crankshaft and a one-piece flange/damper hub with a radially inwardly facing circumferential surface at least indirectly engaged with the radially outwardly facing circumferential surface to center the one-piece damper/flange hub and the flexplate.
- a dry hybrid damper assembly including a flexplate with a radially outwardly facing circumferential surface and a portion arranged for connection to a crankshaft and a one-piece flange/damper hub with a radially inwardly facing circumferential surface at least indirectly engaged with the radially outwardly facing circumferential surface to center the one-piece damper/flange hub and the flexplate.
- the present invention also broadly comprises a method for centering a dry hybrid damper assembly.
- Figure IA is a perspective view of a cylindrical coordinate system demonstrating spatial terminology used in the present application
- Figure IB is a perspective view of an object in the cylindrical coordinate system of Figure IA demonstrating spatial terminology used in the present application
- Figure 2 is a front view of a present invention flexplate with a damper and a crankshaft;
- Figure 3 a cross-sectional view of the flexplate, damper, and crankshaft shown in Figure 2, generally along line 3-3 in Figure 2;
- Figure 4 a cross-sectional view of the flexplate, damper, and crankshaft shown in Figure 2, generally along line 4-4 in Figure 2;
- Figure 5 is a perspective view of the flexplate shown in Figure 2;
- Figure 6 a detail of area 6 shown in Figure 5;
- Figure 7 a partial cross-sectional view of a present invention flexplate with a one-piece flange/damper hub.
- Figure IA is a perspective view of cylindrical coordinate system 80 demonstrating spatial terminology used in the present application.
- the present invention is at least partially described within the context of a cylindrical coordinate system.
- System 80 has a longitudinal axis 81, used as the reference for the directional and spatial terms that follow.
- the adjectives "axial,” “radial,” and “circumferential” are with respect to an orientation parallel to axis 81, radius 82 (which is orthogonal to axis 81), and circumference 83, respectively.
- the adjectives "axial,” “radial” and “circumferential” also are regarding orientation parallel to respective planes.
- objects 84, 85, and 86 are used.
- Surface 87 of object 84 forms an axial plane.
- axis 81 forms a line along the surface.
- Surface 88 of object 85 forms a radial plane. That is, radius 82 forms a line along the surface.
- Surface 89 of object 86 forms a circumferential plane. That is, circumference 83 forms a line along the surface.
- axial movement or disposition is parallel to axis 81
- radial movement or disposition is parallel to radius 82
- circumferential movement or disposition is parallel to circumference 83. Rotation is with respect to axis 81.
- Figure IB is a perspective view of object 90 in cylindrical coordinate system 80 of
- Cylindrical object 90 is representative of a cylindrical object in a cylindrical coordinate system and is not intended to limit the present invention in any manner.
- Object 90 includes axial surface 91, radial surface 92, and circumferential surface 93.
- Surface 91 is part of an axial plane
- surface 92 is part of a radial plane
- surface 93 is part of a circumferential plane.
- Figure 2 is a front view of present invention fl expiate 10 with a damper and a crankshaft.
- Figure 3 a cross-sectional view of flexplate 10, the damper, and the crankshaft shown in Figure 2, generally along line 3-3 in Figure 2.
- Figure 4 a cross-sectional view of flexplate 10, the damper, and the crankshaft shown in Figure 2, generally along line 4-4 in Figure 2.
- Figure 5 is a perspective view of flexplate 10 shown in Figure 2.
- FIG. 6 a detail of area 6 shown in Figure 5. The following should be viewed in light of Figures 2 through 6.
- the flexplate includes circumferential surface 12 arranged to at least indirectly engage circumferential surface 14 for hub 16 of damper 18 assembly to center the hub and the flexplate. As shown in the figures the circumferential surfaces are in direct contact. In one embodiment (not shown), an intermediate device, such as a bushing, is placed in contact between the circumferential surfaces, thus, the surfaces are indirectly engaged.
- the flexplate also includes portion 20 arranged to engage a crankshaft, for example, crankshaft 22, and center the flexplate on the crankshaft.
- the flexplate includes portion 24, for example, an outer circumferential portion of the flexplate, arranged for connection with at least one cover plate, for example, cover plates 26 and 28, for the damper.
- Circumferential surface 12 is radially inwardly facing and circumferential surface 14 is radially outwardly facing.
- the portion of the flexplate arranged for connection to the crankshaft includes a plurality of features 30 arranged to engage a plurality of protrusions 32 on the crankshaft.
- the features 30 are holes, or piercings, in the flexplate.
- the flexplate includes radial wall 34 arranged to engage axial end 36 for the hub.
- flexplate 1 portion 20 is pierced to form surfaces 38, which engage surface 40 on the crankshaft.
- surface 40 is a machined step in the crankshaft.
- forming 42 of the flexplate includes surface 12 and wall 36 and the hub is inserted in the forming.
- the flexplate is rigidly connected to, for example, rotationally connected to, and centered to damper 18, for example, cover plates 26 and 28, using any means known in the art, for example, dowel pins or rivets 44.
- Rotationally connected, or secured we mean that the flexplate and the damper are connected such that the two components rotate together, that is, the two components are fixed with respect to rotation.
- Rotationally connecting two components does not necessarily limit relative movement in other directions.
- two components that are rotationally connected to have axial movement with respect to each other via a spline connection.
- rotational connection does not imply that movement in other directions is necessarily present.
- two components that are rotationally connected can be axially fixed one to the other. The preceding explanation of rotational connection is applicable to the discussions infi'ct.
- flexplate 10 Since flexplate 10 is centered to the main part of damper 18, and hub 16 is centered into flexplate 10, the hub and flange 46 assembly of the damper are centered and protected against misalignment with respect to the rest of the damper.
- the flexplate is formed by stamping.
- a stamped flexplate does not require a secondary machining process because all required tolerances are achievable in the stamping process.
- outer surface 48 of the hub and flange 46 for the damper for example, distal end 49, are engaged. Torque is transmitted from the flange to the hub when the damper is in operation, that is, when a load is applied to the flexplate.
- rivets 44 connect the flexplate to inertia rings 50 and 51.
- ring gear 52 is attached to the flexplate by any means known in the art, for example, by welding, and is engageable with a starter gear (not shown) to start a vehicle (not shown) in which the flexplate is installed.
- flexplate 10 centers the hub and flange assembly to the rest of the damper assembly and to the crankshaft.
- Figure 7 a partial cross-sectional view of present invention flexplate 56 with one- piece flange/damper hub 58. That is, hub portion 60 and flange 62 for damper 64 (only partially shown) are integral to the hub.
- the flexplate includes circumferential surface 66 arranged to directly or indirectly engage circumferential surface 68 for hub 58 to center the hub and the flexplate.
- a friction-reducing device for example, bushing 70 is disposed between the flexplate and element 58.
- surfaces 66 and 68 are in direct contact.
- the flexplate also includes portion 72 arranged to engage a crankshaft, for example, crankshaft 74, and center the flexplate on the crankshaft.
- portion 72 is bolted to the crankshaft.
- surface 68 is facing radially outward and surface 70 is facing radially inward.
- single piece flexplate 56 is for centering both the primary and secondary sides of a damper (only parts of which are shown), for example, damper 64 through inside surface 68 of one-piece damper flange/damper hub 58.
- external splines 76 on flange/hub 58 are formed by an extension process in press or can be rolled as a secondary operation.
- Radius 78 of surface 68 is a centering diameter and is formed to finished size and dimension during an extension process.
- a first step rotationally connects and centers a flexplate with a crankshaft and a second step controls a radial position of a circumferential surface of a hub for the damper using a circumferential surface of the flexplate to center the hub and the flexplate.
- a third step rotationally connects the flexplate with at least one cover plate for the damper.
- the circumferential surfaces for the flexplate and the hub are radially inwardly facing and radially outwardly facing, respectively, or the ckcumferential surfaces for the flexplate and the hub are radially outwardly facing and radially inwardly facing, respectively.
- rotationally connecting and centering a flexplate with a crankshaft includes engaging a plurality of holes on the flexplate with a plurality of protrusions on the crankshaft.
- a fourth step engages an outer surface of the hub and a flange for the damper, hi a further embodiment, the hub is integral to the damper.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Motor Power Transmission Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009001221T DE112009001221T5 (en) | 2008-05-28 | 2009-05-11 | Centering of a flex disk for guiding a hub of a dry-running hybrid damper |
CN2009801194980A CN102046997A (en) | 2008-05-28 | 2009-05-11 | Centering feature of a flexplate to pilot the hub of a dry hybrid damper |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13006908P | 2008-05-28 | 2008-05-28 | |
US61/130,069 | 2008-05-28 | ||
US18891908P | 2008-08-14 | 2008-08-14 | |
US61/188,919 | 2008-08-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009143958A1 true WO2009143958A1 (en) | 2009-12-03 |
Family
ID=41037875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/003313 WO2009143958A1 (en) | 2008-05-28 | 2009-05-11 | Centering feature of a flexplate to pilot the hub of a dry hybrid damper |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN102046997A (en) |
DE (1) | DE112009001221T5 (en) |
WO (1) | WO2009143958A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9982748B2 (en) | 2012-12-12 | 2018-05-29 | Magna International | Flexplates and method for capacitor discharge welding of flexplates |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19959962A1 (en) * | 1998-12-28 | 2000-06-29 | Luk Lamellen & Kupplungsbau | Axially flexible flywheel for connection of a crankshaft of an internal combustion engine comprises discs and annular component with starter gear mounted to the counter pressure plate on the cams |
EP1258651A2 (en) * | 2001-05-17 | 2002-11-20 | Honda Giken Kogyo Kabushiki Kaisha | Flywheel device for prime mover |
US20070137421A1 (en) * | 2005-11-23 | 2007-06-21 | Dennis Reid | Engine and transmission coupling system and method |
-
2009
- 2009-05-11 WO PCT/EP2009/003313 patent/WO2009143958A1/en active Application Filing
- 2009-05-11 DE DE112009001221T patent/DE112009001221T5/en not_active Ceased
- 2009-05-11 CN CN2009801194980A patent/CN102046997A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19959962A1 (en) * | 1998-12-28 | 2000-06-29 | Luk Lamellen & Kupplungsbau | Axially flexible flywheel for connection of a crankshaft of an internal combustion engine comprises discs and annular component with starter gear mounted to the counter pressure plate on the cams |
EP1258651A2 (en) * | 2001-05-17 | 2002-11-20 | Honda Giken Kogyo Kabushiki Kaisha | Flywheel device for prime mover |
US20070137421A1 (en) * | 2005-11-23 | 2007-06-21 | Dennis Reid | Engine and transmission coupling system and method |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9982748B2 (en) | 2012-12-12 | 2018-05-29 | Magna International | Flexplates and method for capacitor discharge welding of flexplates |
US10975931B2 (en) | 2012-12-12 | 2021-04-13 | Magna International | Flexplates and method for capacitor discharge welding of flexplates |
Also Published As
Publication number | Publication date |
---|---|
DE112009001221T5 (en) | 2011-04-07 |
CN102046997A (en) | 2011-05-04 |
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