WO2003076832A1 - Wälzkörpergewindetrieb - Google Patents
Wälzkörpergewindetrieb Download PDFInfo
- Publication number
- WO2003076832A1 WO2003076832A1 PCT/EP2003/002472 EP0302472W WO03076832A1 WO 2003076832 A1 WO2003076832 A1 WO 2003076832A1 EP 0302472 W EP0302472 W EP 0302472W WO 03076832 A1 WO03076832 A1 WO 03076832A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spindle nut
- screw drive
- body screw
- rolled
- housing
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0442—Conversion of rotational into longitudinal movement
- B62D5/0445—Screw drives
- B62D5/0448—Ball nuts
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
- F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
- F16C23/084—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface sliding on a complementary spherical surface
-
- 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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- 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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H2025/2445—Supports or other means for compensating misalignment or offset between screw and nut
Definitions
- the present invention relates to a roller body screw drive as used, for example, in machine tools, but also in electromechanically actuated steering devices of motor vehicles. With such ball screws, a rotational movement can be converted into a linear movement.
- a ball screw nut has become known, with a threaded spindle which is in screw engagement with balls with a spindle nut.
- the spindle nut is over two in an X arrangement.
- Posed angular contact ball bearings rotatably mounted on a housing, the spindle nut for rotation via a motor can be driven.
- Rolling element screw drives are very sensitive to misalignment and / or tilting between the spindle and the spindle nut. Such misalignments increase friction within the rolling element screw drive, so that the power consumption must be increased in an undesirable manner.
- the housing in which the spindle nut is rotatably accommodated must be perfectly aligned with the motor shaft of the motor that locks the threaded spindle. Otherwise, transverse forces and bending moments would be undesirably introduced into the spindle nut and / or the threaded spindle.
- the object of the present invention is therefore to provide a roller body screw drive according to the features of the preamble of claim 1, in which undesired transverse forces and bending loads due to alignment missing between the spindle nut and threaded spindle are at least largely excluded.
- this object is achieved in that an outer ring of the rolling bearing is accommodated in a spherical spherical cap of the housing in a pendulum manner.
- the threaded spindle is deflected from its normal position, undesirable transverse forces and bending loads are prevented, because the spindle nut follows the deflection of the threaded spindle due to the oscillating suspension in the housing.
- the spindle nut swivels in the spherical cap.
- the rolling elements, in particular balls, which roll between the threaded spindle and the spindle nut are not additionally clamped radially.
- the rolling element drive according to the invention is particularly suitable for use in electromechanical steering in motor vehicles.
- the outer ring of the rolling bearing is preferably mounted with its spherical outer surface in the spherical cap.
- the spherical lateral surface and the bearing surface of the spherical cap of the housing have a radius, the center point of which ideally falls on the axis of rotation of the threaded spindle, as a result of which the threaded spindle, together with the spindle nut, can be pivoted without problems relative to the housing.
- the spindle nut is preferably rotatably mounted in the housing via a deep groove ball bearing, the balls rolling on a ball groove of an inner ring and on a ball groove of the outer ring. In this way it is ensured that the spindle nut is properly supported and can be driven in radial and axial directions with respect to the housing.
- the inner ring of the deep groove ball bearing can be formed in one piece with the spindle nut.
- the spindle nut fulfills a double function: as a gear part, the conversion of a rotary movement into a linear movement and as a roller bearing part, the roller bearing of the spindle nut in the housing.
- a friction-reducing coating can be provided between the outer ring and the spherical cap.
- the inner ring or the spindle nut can be designed with an axial end for connection to a drive.
- a torsionally stiff but flexible coupling is preferably attached to this end, and a drive can be flanged to the coupling. In this way, misalignments between the drive and the spindle nut may also be permissible, since transverse forces and / or bending moments are not transmitted due to the flexible coupling.
- the roller body screw drive according to the invention shown comprises a threaded spindle 1, which is in engagement with a spindle nut 3 via balls 2 in a known manner.
- the spindle nut 3 is rotatably mounted on a housing 5 via a single-row deep groove ball bearing 4.
- the deep groove ball bearing 4 comprises an outer ring 6 with an outer spherical outer surface and a ball groove 6a on the inner circumference, the outer ring 6 being accommodated in a spherical cap 8 of the housing 5 such that it can oscillate via sliding linings 7. That is, the spindle nut 3 can be pivoted out of its position.
- the spindle nut on its outer circumference with a ball groove 9 is provided
- the embodiment below the center line of the threaded spindle 1 shows a variant according to the invention: an inner ring 10 of the deep groove ball bearing 4 is placed on the spindle nut 3, rotatably connected to this and axially fixed to it.
- the inner ring 10 has a ball groove 10a.
- the balls 2 roll on the ball grooves 6a, 9, 10a.
- the inner ring 10 or the spindle nut 3 are connected at their one axial end via a torsionally rigid but flexible coupling 11 to a drive shaft 12.
- the clutch 11 has two annular projections 13, 14, one of which is rotatably mounted on the drive shaft 12 and the other of which is placed on the spindle nut 3 or the inner ring 10. Between these two annular lugs 13, 14 there is provided a flexible elastic bead 15, which on the one hand is made in one piece with the annular lug 13 and on the other hand is made in one piece with the annular lug 14.
- the bead 15 is designed in such a way that it compensates for misalignment of the drive shaft 12 with respect to the spindle nut 3 without the torque transmission being disturbed.
- the spindle nut 3 can follow this deflection without undesired transverse forces arising between the threaded spindle 1 and the spindle nut 3.
- the deep groove ball bearing 4 pivots with respect to the housing 5, the outer ring 6 sliding along the sliding linings 7.
- the drive shaft 12 can maintain its normal position, since the coupling 11 provided prevents transverse forces or bending moments from being transmitted from the spindle nut 3 to the drive shaft 12.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Transmission Devices (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003215653A AU2003215653A1 (en) | 2002-03-13 | 2003-03-11 | Threaded drive for a rolling element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10210938.9A DE10210938B4 (de) | 2002-03-13 | 2002-03-13 | Wälzkörpergewindetrieb |
DE10210938.9 | 2002-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003076832A1 true WO2003076832A1 (de) | 2003-09-18 |
Family
ID=27797731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/002472 WO2003076832A1 (de) | 2002-03-13 | 2003-03-11 | Wälzkörpergewindetrieb |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003215653A1 (de) |
DE (1) | DE10210938B4 (de) |
WO (1) | WO2003076832A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2465752A1 (de) * | 2010-12-16 | 2012-06-20 | ThyssenKrupp Presta AG | Servolenkung mit sphärischer Lagerung |
WO2012079726A1 (de) * | 2010-12-16 | 2012-06-21 | Thyssenkrupp Presta Ag | Servolenkung mit spindeltrieb |
CN106536325A (zh) * | 2014-05-06 | 2017-03-22 | 蒂森克虏伯普利斯坦股份公司 | 用于滚珠丝杠传动装置的轴承 |
WO2018068932A1 (de) * | 2016-10-12 | 2018-04-19 | Robert Bosch Gmbh | Lenksystem |
US10883581B2 (en) * | 2016-06-14 | 2021-01-05 | Punk Couplings Limited | Lead screw nut |
US10981592B2 (en) * | 2017-12-05 | 2021-04-20 | Zf Active Safety And Electronics Us Llc | Ball nut assembly for a power steering assembly of a vehicle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006055689B4 (de) * | 2006-11-23 | 2012-06-21 | Robert Bosch Gmbh | Hohlwellenmotor |
DE102010056049B4 (de) | 2010-12-23 | 2021-08-12 | Volkswagen Ag | Getriebe, Kraftfahrzeuglenkung und Kraftfahrzeug |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2131593A1 (de) * | 1971-06-25 | 1972-12-28 | Schaeffler Ohg Industriewerk | Einstellbares Waelzlager |
DE3700430A1 (de) * | 1986-01-09 | 1987-07-16 | Hiroshi Teramachi | Kugelumlaufspindel-mutter |
DE3815318A1 (de) * | 1988-05-05 | 1989-11-16 | Bernhard Moll | Pendelgewindelager |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3965761A (en) * | 1974-03-21 | 1976-06-29 | Stanley Richard B | Linear actuator |
AT400881B (de) * | 1992-01-24 | 1996-04-25 | Zimmermann Juergen | Spindelhubgetriebe |
-
2002
- 2002-03-13 DE DE10210938.9A patent/DE10210938B4/de not_active Expired - Fee Related
-
2003
- 2003-03-11 WO PCT/EP2003/002472 patent/WO2003076832A1/de not_active Application Discontinuation
- 2003-03-11 AU AU2003215653A patent/AU2003215653A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2131593A1 (de) * | 1971-06-25 | 1972-12-28 | Schaeffler Ohg Industriewerk | Einstellbares Waelzlager |
DE3700430A1 (de) * | 1986-01-09 | 1987-07-16 | Hiroshi Teramachi | Kugelumlaufspindel-mutter |
DE3700430C2 (de) | 1986-01-09 | 1995-11-30 | Hiroshi Teramachi | Kugelumlaufspindel-Mutter |
DE3815318A1 (de) * | 1988-05-05 | 1989-11-16 | Bernhard Moll | Pendelgewindelager |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2465752A1 (de) * | 2010-12-16 | 2012-06-20 | ThyssenKrupp Presta AG | Servolenkung mit sphärischer Lagerung |
WO2012079726A1 (de) * | 2010-12-16 | 2012-06-21 | Thyssenkrupp Presta Ag | Servolenkung mit spindeltrieb |
CN106536325A (zh) * | 2014-05-06 | 2017-03-22 | 蒂森克虏伯普利斯坦股份公司 | 用于滚珠丝杠传动装置的轴承 |
US9809245B2 (en) * | 2014-05-06 | 2017-11-07 | Thyssenkrupp Presta Ag | Bearing for a ball screw drive |
CN106536325B (zh) * | 2014-05-06 | 2019-01-01 | 蒂森克虏伯普利斯坦股份公司 | 用于滚珠丝杠传动装置的轴承 |
US10883581B2 (en) * | 2016-06-14 | 2021-01-05 | Punk Couplings Limited | Lead screw nut |
WO2018068932A1 (de) * | 2016-10-12 | 2018-04-19 | Robert Bosch Gmbh | Lenksystem |
US10981592B2 (en) * | 2017-12-05 | 2021-04-20 | Zf Active Safety And Electronics Us Llc | Ball nut assembly for a power steering assembly of a vehicle |
Also Published As
Publication number | Publication date |
---|---|
DE10210938A1 (de) | 2003-10-02 |
AU2003215653A1 (en) | 2003-09-22 |
DE10210938B4 (de) | 2016-05-04 |
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