US20150071789A1 - Torque converter impeller including impeller shell having thinned section - Google Patents
Torque converter impeller including impeller shell having thinned section Download PDFInfo
- Publication number
- US20150071789A1 US20150071789A1 US14/482,804 US201414482804A US2015071789A1 US 20150071789 A1 US20150071789 A1 US 20150071789A1 US 201414482804 A US201414482804 A US 201414482804A US 2015071789 A1 US2015071789 A1 US 2015071789A1
- Authority
- US
- United States
- Prior art keywords
- impeller
- axially extending
- extending groove
- recited
- radial extension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
-
- 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
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic 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
- F16H—GEARING
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
- F16H2045/0205—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type two chamber system, i.e. without a separated, closed chamber specially adapted for actuating a lock-up clutch
-
- 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
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
- F16H2045/0221—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type with damping means
- F16H2045/0226—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type with damping means comprising two or more vibration dampers
-
- 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
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
- F16H2045/0273—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type characterised by the type of the friction surface of the lock-up clutch
- F16H2045/0278—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type characterised by the type of the friction surface of the lock-up clutch comprising only two co-acting friction surfaces
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4933—Fluid coupling device
Definitions
- the present disclosure relates generally to torque converters and more specifically to impellers of torque converters.
- U.S. Pub. 2012/0151907 discloses method of connecting an impeller hub and impeller shell.
- the radial extension includes an axially extending groove formed therein.
- the impeller also includes an impeller hub welded to the impeller shell by a weld. The weld is radially inside of the axially extending groove.
- the axially extending groove is 5 to 10 millimeters from the weld.
- a method of forming an impeller for a torque converter includes providing an impeller shell including an inner circumference, an outer circumference and a radial extension extending radially outward from the inner circumference; forming an axially extending groove in the radial extension; and welding an impeller hub to the impeller shell so as to form a weld on a back surface of the radial extension.
- the weld is radially inside of the axially extending groove and the axially extending groove is 5 to 10 millimeters from the weld.
- FIG. 1 shows a schematic cross-sectional side view of a torque converter including an impeller in accordance with an embodiment of the present invention
- FIG. 2 a shows a cross-sectional side view of an impeller shell of the impeller
- FIG. 2 b shows an enlarged view of a radial extension of the impeller shell as shown in the cross-sectional side view shown in FIG. 2 a;
- FIG. 2 c shows a perspective view of a back surface of the impeller
- FIG. 3 a shows a cross-sectional side view of the impeller after a front surface of impeller shell has been thinned
- FIG. 3 b shows an enlarged view of the radial extension of the impeller shell as shown in the cross-sectional side view shown in FIG. 3 a.
- One embodiment of the present invention includes an impeller shell having a particular radius formed therein that is then machined to create a flexible thinned section. Testing has shown that adding flexibility to the impeller shell may improve durability of the impeller hub weld.
- the impeller shell is thinned by machining the back side of the radius to form a bearing surface.
- FIG. 1 shows a schematic cross-sectional side view of a torque converter 10 including an impeller 12 in accordance with an embodiment of the present invention.
- Torque converter 10 includes a cover 14 including a front cover 16 and a rear cover 18 , which is formed by an impeller shell 20 of impeller 12 .
- Cover 14 houses a lockup clutch 22 and a damper 24 , which are both schematically shown, and a turbine 26 opposite of impeller 12 .
- Lockup clutch 22 engages with and disengages from front cover 16 and damper 24 couples turbine 26 to lockup clutch 22 such that turbine 26 is circumferentially driven with front cover 16 when lockup clutch 22 is engaged with front cover 16 .
- Impeller 20 further includes an impeller hub 27 fixed to impeller shell 20 and impeller blades 36 supported by a rounded portion 34 of impeller shell 20 .
- FIG. 2 a shows a cross-sectional side view of impeller shell 20 .
- Impeller shell 20 includes an inner circumference 28 , an outer circumference 30 and a radial extension 32 extending radially from inner circumference 28 .
- Impeller shell 20 includes a rounded portion 34 radially outside of radial extension 32 .
- Rounded portion 34 is configured for supporting impeller blades 36 ( FIGS. 1 and 3 a ) and includes a plurality of slots 38 formed therein for receiving blade tabs of impeller blades 36 .
- Impeller shell 20 includes an axial extension 40 radially outside of rounded portion 34 for connecting to front cover 16 ( FIG. 1 ).
- An outer radial surface of axial extension 40 defines outer circumference 30 .
- FIG. 2 b shows an enlarged view of radial extension 32 as shown in the cross-sectional side view shown in FIG. 2 a .
- Radial extension 32 has an axially extending groove 42 formed in a back surface 43 of impeller shell 20 for adding flexibility to impeller shell 20 .
- Axially extending groove 42 also extends circumferentially.
- axially extending groove 42 is formed during the stamping of impeller shell 20 .
- axially extending groove 42 may be machined or stamping into impeller shell 20 after impeller shell 20 has been formed by stamping.
- Radial extension 32 is substantially plate shaped and includes a flat inner radial portion 44 for connecting to an impeller hub 46 ( FIG. 3 a ).
- An inner radial surface of flat inner radial portion 44 defines inner circumference 28 . Radially outward from flat inner radial portion 44 , radial extension 32 protrudes slightly axially inward to form an intermediate portion 46 . Intermediate portion 46 is substantially flat, except for axially extending groove 42 and an axial protrusion 48 on a front surface 50 of impeller shell 20 formed by material displaced during the stamping of axially extending groove 42 .
- Axially extending groove 42 has a curved surface, which in this preferred embodiment has a radius of curvature R of at least 5 millimeters. Axially extending groove 42 has a depth D of approximately 0.8 millimeters.
- FIG. 2 c shows a perspective view of the back surface 43 of impeller 12 .
- axially extending groove 42 is ring shaped and extends continuously circumferentially around back surface 43 .
- FIG. 3 a shows a cross-sectional side view of impeller 12 after front surface 50 of impeller shell 20 has been thinned and FIG. 3 b shows an enlarged view of radial extension 32 as shown in the cross-sectional side view shown in FIG. 3 a .
- front surface 50 has been machined at intermediate portion 46 to remove material from impeller shell 20 opposite of axially extending groove 42 .
- intermediate portion 46 still protrudes slightly with respect to flat inner radial portion 44 .
- the thickness X of impeller 20 at axially extending groove 42 is at least 1.7 millimeters after the thinning of front surface 50 of radial extension 32 .
- axial protrusion 48 has been removed and a machined portion 52 that is ring shaped and has a flat surface is formed.
- the machining adds further flexibility to impeller shell 20 .
- rounded portion 34 supports a plurality of impeller blades 36 .
- Impeller hub 27 is welded to impeller shell 20 by a weld 54 extending circumferentially around impeller hub 27 at a front end 56 thereof. Front end 56 rests against back surface 43 of impeller shell 20 .
- axially extending groove 42 is spaced from weld 54 by a radial distance Y that is between 5 to 10 millimeters. Testing has shown that this adding of flexibility to the impeller shell 20 improves durability of impeller hub weld 54 .
Abstract
Description
- This claims the benefit to U.S. Provisional Patent Application No. 61/876,843, filed on Sep. 12, 2013, which is hereby incorporated by reference herein.
- The present disclosure relates generally to torque converters and more specifically to impellers of torque converters.
- U.S. Pub. 2012/0151907 discloses method of connecting an impeller hub and impeller shell.
- An impeller for a torque converter is provided. The impeller includes an impeller shell including an inner circumference, an outer circumference and a radial extension extending radially outward from the inner circumference. The radial extension includes an axially extending groove formed therein. The impeller also includes an impeller hub welded to the impeller shell by a weld. The weld is radially inside of the axially extending groove. The axially extending groove is 5 to 10 millimeters from the weld.
- A method of forming an impeller for a torque converter is provided. The method includes providing an impeller shell including an inner circumference, an outer circumference and a radial extension extending radially outward from the inner circumference; forming an axially extending groove in the radial extension; and welding an impeller hub to the impeller shell so as to form a weld on a back surface of the radial extension. The weld is radially inside of the axially extending groove and the axially extending groove is 5 to 10 millimeters from the weld.
- The present invention is described below by reference to the following drawings, in which:
-
FIG. 1 shows a schematic cross-sectional side view of a torque converter including an impeller in accordance with an embodiment of the present invention; -
FIG. 2 a shows a cross-sectional side view of an impeller shell of the impeller; -
FIG. 2 b shows an enlarged view of a radial extension of the impeller shell as shown in the cross-sectional side view shown inFIG. 2 a; -
FIG. 2 c shows a perspective view of a back surface of the impeller; -
FIG. 3 a shows a cross-sectional side view of the impeller after a front surface of impeller shell has been thinned; and -
FIG. 3 b shows an enlarged view of the radial extension of the impeller shell as shown in the cross-sectional side view shown inFIG. 3 a. - One embodiment of the present invention includes an impeller shell having a particular radius formed therein that is then machined to create a flexible thinned section. Testing has shown that adding flexibility to the impeller shell may improve durability of the impeller hub weld. The impeller shell is thinned by machining the back side of the radius to form a bearing surface.
-
FIG. 1 shows a schematic cross-sectional side view of atorque converter 10 including animpeller 12 in accordance with an embodiment of the present invention.Torque converter 10 includes acover 14 including afront cover 16 and a rear cover 18, which is formed by animpeller shell 20 ofimpeller 12.Cover 14 houses alockup clutch 22 and adamper 24, which are both schematically shown, and aturbine 26 opposite ofimpeller 12.Lockup clutch 22 engages with and disengages fromfront cover 16 anddamper 24couples turbine 26 to lockupclutch 22 such thatturbine 26 is circumferentially driven withfront cover 16 whenlockup clutch 22 is engaged withfront cover 16.Impeller 20 further includes animpeller hub 27 fixed toimpeller shell 20 andimpeller blades 36 supported by arounded portion 34 ofimpeller shell 20. -
FIG. 2 a shows a cross-sectional side view ofimpeller shell 20.Impeller shell 20 includes aninner circumference 28, anouter circumference 30 and aradial extension 32 extending radially frominner circumference 28.Impeller shell 20 includes arounded portion 34 radially outside ofradial extension 32. Roundedportion 34 is configured for supporting impeller blades 36 (FIGS. 1 and 3 a) and includes a plurality ofslots 38 formed therein for receiving blade tabs ofimpeller blades 36.Impeller shell 20 includes anaxial extension 40 radially outside ofrounded portion 34 for connecting to front cover 16 (FIG. 1 ). An outer radial surface ofaxial extension 40 definesouter circumference 30. -
FIG. 2 b shows an enlarged view ofradial extension 32 as shown in the cross-sectional side view shown inFIG. 2 a.Radial extension 32 has an axially extendinggroove 42 formed in aback surface 43 ofimpeller shell 20 for adding flexibility toimpeller shell 20. Axially extendinggroove 42 also extends circumferentially. In this preferred embodiment, axially extendinggroove 42 is formed during the stamping ofimpeller shell 20. In other embodiments, axially extendinggroove 42 may be machined or stamping intoimpeller shell 20 afterimpeller shell 20 has been formed by stamping.Radial extension 32 is substantially plate shaped and includes a flat innerradial portion 44 for connecting to an impeller hub 46 (FIG. 3 a). An inner radial surface of flat innerradial portion 44 definesinner circumference 28. Radially outward from flat innerradial portion 44,radial extension 32 protrudes slightly axially inward to form anintermediate portion 46.Intermediate portion 46 is substantially flat, except for axially extendinggroove 42 and anaxial protrusion 48 on afront surface 50 ofimpeller shell 20 formed by material displaced during the stamping of axially extendinggroove 42. Axially extendinggroove 42 has a curved surface, which in this preferred embodiment has a radius of curvature R of at least 5 millimeters. Axially extendinggroove 42 has a depth D of approximately 0.8 millimeters. -
FIG. 2 c shows a perspective view of theback surface 43 ofimpeller 12. As shown inFIG. 2 c, axially extendinggroove 42 is ring shaped and extends continuously circumferentially aroundback surface 43. -
FIG. 3 a shows a cross-sectional side view ofimpeller 12 afterfront surface 50 ofimpeller shell 20 has been thinned andFIG. 3 b shows an enlarged view ofradial extension 32 as shown in the cross-sectional side view shown inFIG. 3 a. Specifically,front surface 50 has been machined atintermediate portion 46 to remove material fromimpeller shell 20 opposite of axially extendinggroove 42. As shown inFIG. 3 b, after machining,intermediate portion 46 still protrudes slightly with respect to flat innerradial portion 44. In this preferred embodiment, the thickness X ofimpeller 20 at axially extendinggroove 42 is at least 1.7 millimeters after the thinning offront surface 50 ofradial extension 32. After the machining,axial protrusion 48 has been removed and a machinedportion 52 that is ring shaped and has a flat surface is formed. The machining adds further flexibility toimpeller shell 20. As shown inFIG. 3 a,rounded portion 34 supports a plurality ofimpeller blades 36. -
Impeller hub 27 is welded toimpeller shell 20 by aweld 54 extending circumferentially aroundimpeller hub 27 at afront end 56 thereof.Front end 56 rests againstback surface 43 ofimpeller shell 20. To add desired flexibility toimpeller shell 20, axially extendinggroove 42 is spaced fromweld 54 by a radial distance Y that is between 5 to 10 millimeters. Testing has shown that this adding of flexibility to theimpeller shell 20 improves durability ofimpeller hub weld 54. - In the preceding specification, the invention has been described with reference to specific exemplary embodiments and examples thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of invention as set forth in the claims that follow. The specification and drawings are accordingly to be regarded in an illustrative manner rather than a restrictive sense.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/482,804 US20150071789A1 (en) | 2013-09-12 | 2014-09-10 | Torque converter impeller including impeller shell having thinned section |
US15/913,388 US10415580B2 (en) | 2013-09-12 | 2018-03-06 | Torque converter impeller including impeller shell having thinned section |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361876843P | 2013-09-12 | 2013-09-12 | |
US14/482,804 US20150071789A1 (en) | 2013-09-12 | 2014-09-10 | Torque converter impeller including impeller shell having thinned section |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/913,388 Division US10415580B2 (en) | 2013-09-12 | 2018-03-06 | Torque converter impeller including impeller shell having thinned section |
Publications (1)
Publication Number | Publication Date |
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US20150071789A1 true US20150071789A1 (en) | 2015-03-12 |
Family
ID=52478790
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/482,804 Abandoned US20150071789A1 (en) | 2013-09-12 | 2014-09-10 | Torque converter impeller including impeller shell having thinned section |
US15/913,388 Active US10415580B2 (en) | 2013-09-12 | 2018-03-06 | Torque converter impeller including impeller shell having thinned section |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US15/913,388 Active US10415580B2 (en) | 2013-09-12 | 2018-03-06 | Torque converter impeller including impeller shell having thinned section |
Country Status (2)
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US (2) | US20150071789A1 (en) |
DE (1) | DE102014218155A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160131238A1 (en) * | 2014-11-12 | 2016-05-12 | Schaeffler Technologies Gmbh & Co. Kg | Method of forming a torque converter impeller including machining a weld root |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614504A1 (en) * | 1986-04-29 | 1987-11-05 | Daimler Benz Ag | OUTER SHELL OF A PUMP WHEEL OF A HYDRODYNAMIC FLOW UNIT |
US6406262B1 (en) * | 1999-07-17 | 2002-06-18 | Mannesmann Sachs Ag | Vane wheel for a hydrodynamic coupling device |
KR101370664B1 (en) * | 2005-10-14 | 2014-03-04 | 비브 나노, 인코포레이티드 | Composite nanoparticles, nanoparticles and methods for producing same |
DE102007014311A1 (en) * | 2007-03-26 | 2008-10-02 | Zf Friedrichshafen Ag | Hydrodynamic coupling device |
DE102011087205A1 (en) | 2010-12-21 | 2012-06-21 | Schaeffler Technologies Gmbh & Co. Kg | Impeller hub with flange |
-
2014
- 2014-09-10 US US14/482,804 patent/US20150071789A1/en not_active Abandoned
- 2014-09-11 DE DE201410218155 patent/DE102014218155A1/en not_active Ceased
-
2018
- 2018-03-06 US US15/913,388 patent/US10415580B2/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160131238A1 (en) * | 2014-11-12 | 2016-05-12 | Schaeffler Technologies Gmbh & Co. Kg | Method of forming a torque converter impeller including machining a weld root |
US10197142B2 (en) * | 2014-11-12 | 2019-02-05 | Schaeffler Technologies AG & Co. KG | Method of forming a torque converter impeller including machining a weld root |
Also Published As
Publication number | Publication date |
---|---|
US20180195522A1 (en) | 2018-07-12 |
DE102014218155A1 (en) | 2015-03-12 |
US10415580B2 (en) | 2019-09-17 |
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Legal Events
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AS | Assignment |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RESH, MICHAEL;BURKY, DAVID, JR.;REEL/FRAME:033713/0687 Effective date: 20140909 |
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Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:SCHAEFFLER TECHNOLOGIES GMBH & CO. KG;REEL/FRAME:037732/0347 Effective date: 20150101 |
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Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, GERMANY Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE PROPERTY NUMBERS PREVIOUSLY RECORDED ON REEL 037732 FRAME 0347. ASSIGNOR(S) HEREBY CONFIRMS THE APP. NO. 14/553248 SHOULD BE APP. NO. 14/553258;ASSIGNOR:SCHAEFFLER TECHNOLOGIES GMBH & CO. KG;REEL/FRAME:040404/0530 Effective date: 20150101 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |