EP3107795A1 - Kugelumlaufmutter, baugruppe für einen kugelgewindeantrieb und verfahren zur herstellung einer kugelumlaufmutter - Google Patents
Kugelumlaufmutter, baugruppe für einen kugelgewindeantrieb und verfahren zur herstellung einer kugelumlaufmutterInfo
- Publication number
- EP3107795A1 EP3107795A1 EP15702429.0A EP15702429A EP3107795A1 EP 3107795 A1 EP3107795 A1 EP 3107795A1 EP 15702429 A EP15702429 A EP 15702429A EP 3107795 A1 EP3107795 A1 EP 3107795A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ball nut
- ball
- recirculating ball
- recirculating
- assembly
- 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.)
- Withdrawn
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
- 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
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
- F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
- F16H25/2223—Cross over deflectors between adjacent thread turns, e.g. S-form deflectors connecting neighbouring threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/04—Making machine elements ball-races or sliding bearing races
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/26—Making machine elements housings or supporting parts, e.g. axle housings, engine mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/28—Grooving workpieces
-
- 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
- B62D5/0421—Electric motor acting on or near steering gear
- B62D5/0424—Electric motor acting on or near steering gear the axes of motor and final driven element of steering gear, e.g. rack, being parallel
-
- 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
- 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
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2220/00—Details of milling processes
- B23C2220/28—Finishing
-
- 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
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2081—Parallel arrangement of drive motor to screw axis
-
- 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
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2096—Arrangements for driving the actuator using endless flexible 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
- 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
- F16H2025/2481—Special features for facilitating the manufacturing of spindles, nuts, or sleeves of screw devices
Definitions
- the invention relates to a recirculating ball nut and an assembly for a ball screw drive. Furthermore, the invention relates to a method for producing a recirculating ball nut.
- Ball screw drives are used for example in power steering systems in vehicles.
- the ball nut is mounted on the steering linkage of the vehicle, wherein the ball nut is held stationary in the longitudinal direction of the steering linkage and rotatably supported relative to the steering linkage.
- co-rotating threads are provided in the ball nut and the steering linkage.
- transmission means such as balls, are provided which engage in both threads and thus couple the ball nut and the steering linkage together. If the recirculating ball nut is rotated relative to the steering linkage, for example by a belt drive acting on the outer circumference of the recirculating ball nut, the steering linkage is displaced over the balls in the longitudinal direction relative to the recirculating ball nut.
- the ball screw drive for example, an additional steering force can be applied to the steering linkage.
- the ball orbits are manufactured with a very low manufacturing tolerance, so that the balls have a very low clearance in the ball orbits, but still low friction can roll in the ball tracks.
- forging processes have been used, whereby the known forging processes do not ensure sufficient accuracy for the production of the ball tracks or the production outlay for the desired accuracy is very high.
- the inner ball orbits difficult to reach, whereby the manufacturing cost is increased.
- Alternative manufacturing methods such as milling have the disadvantage that a very high material usage is required.
- the object of the invention is to provide a recirculating ball nut and an assembly for a ball screw drive, which are easier and faster to manufacture and have a lower manufacturing tolerance.
- the object of the invention is furthermore to provide a material-saving method for producing such a recirculating ball nut.
- a ball nut for a ball screw drive with a base body having at least one ball orbit, wherein the base body is a forging component and the ball orbit is made by a machining production process.
- the basic body is produced by forging, which makes a material-saving production possible.
- the ball orbits can already be roughly introduced into the base body in the forging process. Subsequently, the production or the post-processing of the ball orbits with a machining process, by which the ball orbits can be made with a very high accuracy.
- the production of the ball orbit with a machining production method also has the advantage that this is easier to implement in a one-piece ball nut.
- a forging process it is difficult to machine the internal recirculating ball tracks, so that the recirculating ball nut is often divided circumferentially into several segments, which are manufactured separately and then joined together.
- the inner surface of the base body is first smooth in the forging process, whereby the recirculating ball nut can also be made in one piece, as no undercuts on the inner surface of the body are required. Subsequently, the ball orbits can be introduced with a very high precision machining process.
- the base body can be produced by a precision forging method, so that it already has very low manufacturing tolerances.
- the amount of material that is subsequently removed by the machining process can be kept very low.
- the ball orbit can be made for example by milling, so that a very high accuracy of the ball orbit is possible.
- a module for a ball screw drive a power steering is further provided with a pulley and a ball nut according to the invention, wherein the pulley is rotatably connected to the ball nut.
- This two-part construction allows for easy manufacture of the assembly, since both the pulley and the recirculating ball nut can be made separately. Only after the components are made with the desired accuracy, they are joined together. For both components, a separate manufacturing process can be used.
- flanges can be provided for connecting the two components, which are rotatably connected with fastening means, in particular rivets or screws.
- fastening means in particular rivets or screws.
- the pulley and the ball nut are preferably abutted against each other with these flanges, so that mutual displacement in the longitudinal direction by the flanges and the fastening means is prevented.
- a method for producing a recirculating ball nut for a ball screw drive having a base body having at least one ball orbit having the following manufacturing steps: -
- the base body is produced by a forging method, and the ball orbit is reworked after the preparation of the body with a machining process.
- the ball orbit is milled after the production of the body.
- FIG. 1 is a partially cut and perspective view of an assembly according to the invention for a ball screw drive with a ball screw according to the invention
- FIG. 2 is a schematic representation of a power steering with an assembly according to the invention
- FIGS. 3a and 3b show a schematic representation of various method steps of a method according to the invention for producing a recirculating ball nut according to the invention.
- Figure 2 shown in partial detail power steering 14 shown.
- the assembly 10 has in addition to the ball nut 12 a pulley 16 which is rotatably connected to the ball nut 12.
- the ball nut 12 has a substantially cylindrical body 13. On the main body 13 of the ball nut 12 and on the pulley 16 flanges 18, 20 are provided which abut one another in a longitudinal direction L and are fixedly connected to one another with a plurality of fastening means 22, in the embodiment shown here rivets, in the longitudinal direction L and also in the circumferential direction. On the inner surface 24 of the ball nut 12 a plurality of thread-like recirculating ball tracks 26 are provided. On the outside of the pulley tooth profile 27 is provided.
- the power steering system 14 shown in FIG. 2 has a steering linkage 28 with a thread 30 whose orientation and pitch coincide with the recirculating ball tracks 26 of the recirculating ball nut 12.
- the assembly 10 is rotatably mounted relative to the steering linkage 28 and shear-resistant in the longitudinal direction L. held. Between the ball nut 12 and the steering linkage 28 a plurality of transmission means, in particular balls, are provided, which engage both in the ball tracks 26 as well as in the thread 30 of the steering linkage 28, whereby the ball nut 12 is coupled to the steering linkage 28.
- the pulley 16 of the assembly 10 is coupled via a belt 32 to a drive 34 of the power steering 14. If the assembly 10 is rotated by the drive 34, the steering linkage 28 is displaced by the coupling over the balls in the longitudinal direction L, whereby a steering assist force acts on the steering linkage 28.
- the recirculating ball nut 12 or the base body 13 of the recirculating ball nut 12 is produced in a forging method, in particular a precision forging method (FIG. 3 a). Subsequently, the ball tracks 26 are produced or reworked by a machining production method, for example by milling (FIG. 3b).
- the forging method allows a material-saving production of the base body 13, so that very little material waste arises.
- producing the entire main body 13 or the recirculating ball nut 12 using a metal-cutting manufacturing process would result in a very high material consumption.
- this method by which very small manufacturing tolerances are possible to use exclusively for the production and / or post-processing of areas of the ball nut 12, in which this accuracy is required, so the ball orbits 26.
- By reducing the machining process exclusively on the ball orbits is a material-saving production of the ball nut 12 possible.
- any other suitable machining process for producing the ball orbits 26 may be used.
- the assembly 10 is formed in two parts, with a pulley 16 and a ball nut 12. Depending on the structure of the assembly 10 but these components can also be integrally formed with each other.
- the pulley 16 may be part of the main body 13 of the ball nut 12.
- the rotationally fixed connection between the pulley 16 and the ball nut 12 can also be produced in other ways, for example by a suitable torque transmission profile.
- screws or other suitable fastening means 22 may be used instead of the rivets.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Forging (AREA)
- Transmission Devices (AREA)
- Power Steering Mechanism (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014102132.0A DE102014102132A1 (de) | 2014-02-19 | 2014-02-19 | Kugelumlaufmutter, Baugruppe für einen Kugelgewindeantrieb und Verfahren zur Herstellung einer Kugelumlaufmutter |
PCT/EP2015/051615 WO2015124387A1 (de) | 2014-02-19 | 2015-01-27 | Kugelumlaufmutter, baugruppe für einen kugelgewindeantrieb und verfahren zur herstellung einer kugelumlaufmutter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3107795A1 true EP3107795A1 (de) | 2016-12-28 |
Family
ID=52446359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15702429.0A Withdrawn EP3107795A1 (de) | 2014-02-19 | 2015-01-27 | Kugelumlaufmutter, baugruppe für einen kugelgewindeantrieb und verfahren zur herstellung einer kugelumlaufmutter |
Country Status (5)
Country | Link |
---|---|
US (1) | US10119600B2 (de) |
EP (1) | EP3107795A1 (de) |
CN (1) | CN106030156A (de) |
DE (1) | DE102014102132A1 (de) |
WO (1) | WO2015124387A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014102132A1 (de) * | 2014-02-19 | 2015-08-20 | Trw Automotive Gmbh | Kugelumlaufmutter, Baugruppe für einen Kugelgewindeantrieb und Verfahren zur Herstellung einer Kugelumlaufmutter |
JP6837233B2 (ja) * | 2017-01-11 | 2021-03-03 | 日立Astemo株式会社 | パワーステアリング装置 |
KR101943919B1 (ko) * | 2017-08-08 | 2019-01-30 | 주식회사 만도 | 전동식 동력 보조 조향장치 |
JP6359753B1 (ja) * | 2017-12-25 | 2018-07-18 | 株式会社椿本チエイン | 伝動装置 |
DE102018209543A1 (de) | 2018-06-14 | 2019-12-19 | Ford Global Technologies, Llc | Lenkgetriebe für ein Kraftfahrzeug |
CN109109966B (zh) * | 2018-07-31 | 2020-05-15 | 广州市沁源汽车零件制造有限公司 | 电动助力转向器及汽车 |
US10865862B2 (en) * | 2018-08-27 | 2020-12-15 | Hitachi Automotive Systems Americas, Inc. | Pulley and ball nut assembly |
DE102019205972A1 (de) * | 2019-04-25 | 2020-10-29 | Robert Bosch Gmbh | Elektromechanischer Bremsdruckerzeuger für ein hydraulisches Bremssystem eines Fahrzeugs sowie Fahrzeug umfassend einen elektromechanischen Bremsdruckerzeuger |
US11384827B2 (en) * | 2019-11-25 | 2022-07-12 | Steering Solutions Ip Holding Corporation | Electric power steering polymer drive pulley |
US11460082B2 (en) * | 2020-06-29 | 2022-10-04 | Akebnon Brake Industry Co., Ltd. | Self-lock high-efficient rotary to linear mechanism |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006041719A1 (de) * | 2006-09-06 | 2008-03-27 | Volkswagen Ag | Kugelgewindemutter mit einem mindestens eine Gewindeöffnung aufweisenden Flansch und Verfahren zu deren Herstellung |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4145798A (en) * | 1977-10-21 | 1979-03-27 | Federal-Mogul Corporation | Forging recessed configurations on a body member |
JP2006027577A (ja) | 2004-07-22 | 2006-02-02 | Kayaba Ind Co Ltd | 電動パワーステアリング装置 |
DE112005003002T5 (de) * | 2004-12-28 | 2007-10-18 | Nsk Ltd. | Elektrische Servolenkvorrichtung |
JP2008105649A (ja) * | 2006-10-27 | 2008-05-08 | Jtekt Corp | 電動パワーステアリング装置 |
JP2008275095A (ja) * | 2007-05-01 | 2008-11-13 | Ntn Corp | ボールねじおよびその製造方法 |
US8220349B2 (en) * | 2007-10-31 | 2012-07-17 | Innoventor, Inc. | Telescoping linear actuator |
DE102009036824A1 (de) * | 2009-08-10 | 2011-02-17 | Schaeffler Technologies Gmbh & Co. Kg | Verfahren zum Herstellen einer Gewindemutter eines Kugelgewindetriebes |
KR101414381B1 (ko) * | 2010-03-17 | 2014-07-01 | 닛본 세이고 가부시끼가이샤 | 볼 나사, 및 볼 나사용 너트의 제조방법 |
WO2011122053A1 (ja) * | 2010-03-31 | 2011-10-06 | 日本精工株式会社 | ボールねじ用ナットの製造方法及びボールねじ |
JP5776185B2 (ja) * | 2011-01-20 | 2015-09-09 | 日本精工株式会社 | ボールねじの製造方法 |
KR101450326B1 (ko) * | 2011-08-31 | 2014-10-21 | 주식회사 만도 | 벨트식 전동장치 및 이를 구비한 랙구동형 동력 보조 조향장치 |
US9440672B2 (en) * | 2013-03-14 | 2016-09-13 | Trw Automotive U.S. Llc | Electric power steering assembly |
DE102014102132A1 (de) * | 2014-02-19 | 2015-08-20 | Trw Automotive Gmbh | Kugelumlaufmutter, Baugruppe für einen Kugelgewindeantrieb und Verfahren zur Herstellung einer Kugelumlaufmutter |
-
2014
- 2014-02-19 DE DE102014102132.0A patent/DE102014102132A1/de not_active Withdrawn
-
2015
- 2015-01-27 EP EP15702429.0A patent/EP3107795A1/de not_active Withdrawn
- 2015-01-27 WO PCT/EP2015/051615 patent/WO2015124387A1/de active Application Filing
- 2015-01-27 US US15/119,140 patent/US10119600B2/en active Active
- 2015-01-27 CN CN201580009394.XA patent/CN106030156A/zh active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006041719A1 (de) * | 2006-09-06 | 2008-03-27 | Volkswagen Ag | Kugelgewindemutter mit einem mindestens eine Gewindeöffnung aufweisenden Flansch und Verfahren zu deren Herstellung |
Also Published As
Publication number | Publication date |
---|---|
US10119600B2 (en) | 2018-11-06 |
US20170030448A1 (en) | 2017-02-02 |
DE102014102132A1 (de) | 2015-08-20 |
WO2015124387A1 (de) | 2015-08-27 |
CN106030156A (zh) | 2016-10-12 |
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