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WO2018196915A1 - Mécanisme de vis-écrou à galets - Google Patents

Mécanisme de vis-écrou à galets Download PDF

Info

Publication number
WO2018196915A1
WO2018196915A1 PCT/DE2018/100316 DE2018100316W WO2018196915A1 WO 2018196915 A1 WO2018196915 A1 WO 2018196915A1 DE 2018100316 W DE2018100316 W DE 2018100316W WO 2018196915 A1 WO2018196915 A1 WO 2018196915A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw drive
roller screw
metal part
sleeve
drive according
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.)
Ceased
Application number
PCT/DE2018/100316
Other languages
German (de)
English (en)
Inventor
Mario Kreutzer
Harry Schmeiko
Christian GAUBE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2018196915A1 publication Critical patent/WO2018196915A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
    • 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
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
    • F16H2025/2276—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers using roller spacers, i.e. spacers separating the rollers, e.g. by forming a complete chain

Definitions

  • the invention relates to a roller screw drive suitable for use in a linear actuator according to the preamble of claim 1.
  • roller screw is known for example from DE 103 54 064 A1.
  • a threaded spindle and a spindle nut of the roller screw thread grooves are formed in which rollers roll as rolling elements.
  • the rollers of the known roller screw are guided in a cage, which has two straps arranged at a distance from one another, which span a plane to which the axis of rotation of the rollers is arranged in parallel.
  • the axes of rotation of the rollers are aligned transversely to the two straps.
  • Further roller screw drives are known, for example, from the documents DE 101 09 505 B4 and GB 2 361 286 A. In both cases, these are screw drives with rolling element feedback.
  • roller screw in an electromechanically actuated disc brake
  • the roller screw acts as a reduction gear, wherein a rotor of an electric motor radially surrounds the roller screw.
  • a roller screw with rollers, which are individually guided by cage segments, is disclosed for example in DE 101 13 510 B4.
  • WO 2009/053359 A1 describes a combined vehicle brake with an electromechanically actuated parking brake.
  • a screw drive used in this device is designed as a ball screw drive.
  • a plurality of coil springs inserted in a thread load the rolling elements, that is balls, with a force in the circumferential direction of the ball screw.
  • DE 10 2013 206 080 A1 discloses a ball screw with a arranged on a threaded spindle nut, that is, spindle nut, and wound around the longitudinal axis of the threaded ball channel, in which in addition to the balls at least one coil spring is added, which at a nem Molded part is supported, which is inserted into a recess of the threaded nut.
  • the invention has for its object to provide a multi-purpose roller screw, which is characterized by a particularly favorable ratio between claimed space and transferable forces.
  • the roller screw has in known per se basic construction two screw drive components, namely a threaded spindle and a spindle nut on.
  • the thread of the roller screw drive can be designed either as a single thread or as a multi-start thread.
  • rolls roll as rolling elements between the two screw drive components.
  • needles are also to be understood as rollers.
  • the arrangement of the rollers in the roller screw an axial main load direction is determined in which forces between the two screw drive components are transferable.
  • the roles of the roller screw are guided by means of a cage assembly, which is not necessarily in one piece. According to the invention, at least part of the cage assembly is designed as a load-bearing element, which in this function is effective against the main load direction when the roller screw is loaded axially.
  • the cage assembly comprises a sleeve-shaped metal part, in particular sheet metal part, which is also referred to as a cage in the strict sense and has recesses for the rollers.
  • each roller is preferably guided in a separate recess of the metal part.
  • a plain bearing component of the roller screw drive is formed directly by the sleeve-shaped metal part, which is at least effective when acting between the two screw drive components an axial force against the main load direction.
  • the cage assembly may consist exclusively of the metal part.
  • the metal part is supported in its function as a plain bearing component on its inner side directly on the threaded spindle and on its outer side directly on the spindle nut.
  • the sleeve-shaped metal part which acts as a sliding bearing component against the main load direction at least when the roller screw is loaded, is provided with a friction and / or wear-reducing coating.
  • Such a coating may be, for example, a plastic, in particular PTFE (polytetrafluoroethylene), containing coating or a DLC coating (diamond like carbon).
  • a plastic in particular PTFE (polytetrafluoroethylene), containing coating or a DLC coating (diamond like carbon).
  • the cage assembly comprises at least one separate sliding element, which contacts at least one load of the roller screw against the main loading direction at least one of the two screw drive components.
  • the sliding element can be firmly connected either to one of the screw drive components or to the metal part of the cage arrangement. In principle, embodiments are also feasible, in which the sliding element is firmly connected to any of the said parts.
  • the sleeve-shaped metal part of the cage assembly is formed in various configurations of the roller screw by the force of a helical spring Spring loaded, which is inserted in the helically wound channel formed between the screw drive components.
  • the coil spring is supported by the spindle nut or an element attached to the spindle nut.
  • a rolling element namely a ball, is inserted between the helical spring and the sleeve-shaped metal part.
  • This rolling element provides the coil spring with a larger engagement surface compared to the thin-walled, sleeve-shaped metal part, which efficiently counteracts the risk of mispositioning of the coil spring.
  • the sliding element can engage in the thread of the roller screw drive.
  • the coil spring With its end facing away from the metal part of the cage assembly, the coil spring can be supported on the sliding element, which is firmly connected to the spindle nut. If the end of the helical spring facing the sleeve-shaped metal part is supported on the metal part with the interposition of a ball, the ball, with suitable dimensioning, can transmit forces against the main load direction in addition to the sliding element within the roller screw drive. Such a function of the ball is not given, if - as is the case in preferred designs - the diameter of the ball is significantly smaller than the diameter of the rollers of the screw drive.
  • the roller screw is preferably a screw without WälzSystemschreib entry.
  • the roller screw drive is suitable, for example, for use in an electromechanical brake of a motor vehicle.
  • FIG. 1 shows a first embodiment of a roller screw drive
  • Fig. 2 shows a second embodiment of a roller screw drive
  • FIG. 3 shows a detail "X" of the roller screw drive according to FIG. 2, 4 shows a comparison with the embodiment of Figure 2 modified design of a Rollgengewindetnebs,
  • FIG. 6 shows a detail "Y" of the roller thread web of FIG. 5, FIG.
  • Fig. 7 to 10 a further design of a Rollgengewindetnebs with various types
  • roller screw drive comprises two screw drive components 2, 3 namely a threaded spindle 2 and a spindle nut 3, between which rollers 4 roll as rolling elements.
  • a force acting between the screw drive components 2, 3 is denoted by F.
  • the force F acts in the main load direction of the roller screw 1, as outlined inter alia in Figures 1 and 2.
  • the threaded spindle 2 and in the arrangement of FIG. 2 the spindle nut 3 is loaded with the force F. If the roller screw 1 is adjusted in the opposite direction, it is called a return stroke.
  • the rollers 4 are guided in a cage assembly 5, which in all embodiments, a sleeve-shaped metal part 6 and at least one spring 7, namely coil spring comprises.
  • the designed as a sheet metal sleeve metal part 6 is in this case supported on the spindle nut 3 via the at least one spring 7.
  • the metal part 6 is also referred to as a cage in the strict sense.
  • the rollers 4 are cylindrical rollers which roll on threaded tracks 8, 9, which are formed on the one hand by the threaded spindle 2 and on the other hand by the spindle nut 3.
  • the sleeve-shaped metal part 6 of the cage assembly 5 has pockets 10 for guiding the rollers 4. Through the sleeve-shaped metal part 6, a tilting of the rollers 4 within the roller screw 1 is prevented.
  • the threaded spindle 2 can be used as a driving element of the roller screw drive 1, wherein a torque via a drive, not shown, in particular electric drive, in a spindle journal 1 1 of the threaded spindle 2 can be introduced.
  • the spindle nut 3 is displaced linearly, being secured against rotation in a manner not shown.
  • the cage arrangement 5 is constructed exclusively of the sleeve-shaped metal part 6 and two springs 7, of which only one can be seen in FIG.
  • the pockets 10 are formed as individual pockets for guiding each of a single roller 4.
  • a helically wound channel formed between the thread tracks 8, 9, in which all the rollers 4, separated from one another by the metal part 6, is designated by 12.
  • the springs 7, that is coil springs, inserted is designated by 12.
  • successively pockets 10 extend over only a portion of the length of the sleeve-shaped metal part 6.
  • a continuation of this helix is given by two support webs 13, 14, which also each describe a helix.
  • the supporting web 13 formed by the metal part 6 is directed radially inwards and the support web 14 likewise formed by this metal part 6 is directed radially outward.
  • the support webs 13, 14 serve the purpose of transmitting forces between the screw drive components 2, 3 as soon as the roller screw drive 1 is loaded in total against the main loading direction.
  • the sleeve-shaped metal part 6 acts as a sliding bearing element, wherein the inner support web 13 is supported on the threaded spindle 2 and the outer support web 14 on the spindle nut 3.
  • the sleeve-shaped metal part 6, which for contacting the screw drive components 2, 3 is provided, has a friction-reducing coating.
  • a sliding bearing function of the cage assembly 5 is also given in the design according to FIGS. 2 and 3.
  • a sliding element 15 is present in this case, which, comparable to the spring 7, is inserted into a section of the helical channel 12.
  • the sliding member 15 is loaded by the spring 7 with a force in the tangential direction of the screw drive components 2, 3.
  • the row of rollers 4 in turn is supported in the tangential direction of the screw drive components 2, 3 on the sliding element 15.
  • the sleeve-shaped metal part 5 as a whole has contouring adapted to the shape of the thread tracks 8, 9 and of the channel 12.
  • the design according to FIG. 4 is identical to the design according to FIG.
  • the roller screw drive 1 according to Fig. 4 differs from the embodiment of FIG. 2, characterized in that the springs 7 are supported with the interposition of a respective ball 16 on the sleeve-shaped metal part 6. This assumes that the length of the rollers 4 is at least as large as their diameter, which is given in the embodiment of FIG.
  • the balls 16 enable the transmission of forces within the roller screw drive 1 under load against the main loading direction.
  • the cage arrangement 5 comprises, in addition to the sliding elements 15, radially inwardly or outwardly directed support webs 13, 14 which pass directly through the plate made of sheet metal , sleeve-shaped metal part 6 are formed.
  • the threaded spindle 2 is slidingly mounted several times relative to the spindle nut 3.
  • the pockets 10 in the sleeve-shaped metal part 6 are designed such that even in operating states in which the threaded spindle 2 is almost completely unscrewed from the spindle nut 3, as shown in Fig. 10, the rollers 4 are held in the cage assembly 5.
  • the holding of the rollers 4 through the sleeve-shaped metal part 6, that is, the cage in the strict sense, is in the assembly of the roller screw 1 of advantage.
  • the sleeve-shaped metal part 6 has different, formed as webs areas, which are arranged below and above the axes of rotation of the rollers 4, that is a smaller or smaller distance from the central axis of the roller screw 1 than the center axes of the Have roles 4, which allows a particularly dense arrangement of the rollers 4 within the cage assembly 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne un mécanisme de vis-écrou à galets comportant deux éléments de vis-écrou (2, 3), à savoir une vis (2) et un écrou de broche (3), ainsi que des galets (4) guidés dans un ensemble cage (5) et roulant entre les éléments de vis-écrou (2, 3) sous l'effet d'une force agissant entre ceux-ci dans une direction de sollicitation principale axiale. Au moins une partie de l'ensemble cage (5) est réalisée sous la forme d'un élément de support de charge agissant à l'encontre de la direction de sollicitation principale lors d'une sollicitation axiale entre les éléments de vis-écrou (2, 3).
PCT/DE2018/100316 2017-04-28 2018-04-09 Mécanisme de vis-écrou à galets Ceased WO2018196915A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017109143.2 2017-04-28
DE102017109143.2A DE102017109143A1 (de) 2017-04-28 2017-04-28 Rollengewindetrieb

Publications (1)

Publication Number Publication Date
WO2018196915A1 true WO2018196915A1 (fr) 2018-11-01

Family

ID=62044443

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2018/100316 Ceased WO2018196915A1 (fr) 2017-04-28 2018-04-09 Mécanisme de vis-écrou à galets

Country Status (2)

Country Link
DE (1) DE102017109143A1 (fr)
WO (1) WO2018196915A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113883245A (zh) * 2020-07-01 2022-01-04 芜湖伯特利汽车安全系统股份有限公司 丝杠传动机构
CN113883196A (zh) * 2020-07-01 2022-01-04 芜湖伯特利汽车安全系统股份有限公司 用于车辆的线控制动执行装置
WO2023169413A1 (fr) * 2022-03-09 2023-09-14 芜湖伯特利汽车安全系统股份有限公司 Mécanisme d'entraînement linéaire
CN117227381A (zh) * 2023-11-08 2023-12-15 宁波拓普集团股份有限公司 一种直线驱动式主动悬架系统

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60241565A (ja) * 1984-05-14 1985-11-30 Fuji Seikou Kk ロ−ラ−ネジ
DE19526727A1 (de) * 1994-07-22 1996-01-25 Nsk Ltd Kugelschraubvorrichtung mit externem Umlauf
GB2361286A (en) 2000-04-12 2001-10-17 Thk Co Ltd Roller retainer
DE19511287B4 (de) 1994-07-21 2004-05-06 Continental Teves Ag & Co. Ohg Elektromechanische betätigbare Scheibenbremse
DE10354064A1 (de) 2003-11-19 2005-06-02 Ina-Schaeffler Kg Rollengewindetrieb
WO2009053359A1 (fr) 2007-10-27 2009-04-30 Continental Teves Ag & Co. Ohg Frein de véhicule combiné avec frein de stationnement à actionnement électromécanique
DE10109505B4 (de) 2000-02-28 2010-12-30 Thk Co., Ltd. Walzenspindel und Walzenspindel-Walzenanordnungsverfahren
US20120096967A1 (en) * 2010-10-20 2012-04-26 Liu Jouns Roller screw
DE102013202099A1 (de) * 2012-11-30 2014-06-05 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb, insbesondere für eine Feststellbremse eines Kraftfahrzeuges
DE102013206080A1 (de) 2013-02-08 2014-08-28 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb
DE10113510B4 (de) 2000-03-21 2014-11-27 Thk Co., Ltd. Walzenkäfig, direkt wirkende Führungseinrichtung und Walzenschraube, die den Walzenkäfig verwendet
DE102015201257B3 (de) * 2015-01-26 2016-07-07 Schaeffler Technologies AG & Co. KG Kugelgewindetrieb und zugehöriger elektromechanischer Aktuator

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60241565A (ja) * 1984-05-14 1985-11-30 Fuji Seikou Kk ロ−ラ−ネジ
DE19511287B4 (de) 1994-07-21 2004-05-06 Continental Teves Ag & Co. Ohg Elektromechanische betätigbare Scheibenbremse
DE19526727A1 (de) * 1994-07-22 1996-01-25 Nsk Ltd Kugelschraubvorrichtung mit externem Umlauf
DE10109505B4 (de) 2000-02-28 2010-12-30 Thk Co., Ltd. Walzenspindel und Walzenspindel-Walzenanordnungsverfahren
DE10113510B4 (de) 2000-03-21 2014-11-27 Thk Co., Ltd. Walzenkäfig, direkt wirkende Führungseinrichtung und Walzenschraube, die den Walzenkäfig verwendet
GB2361286A (en) 2000-04-12 2001-10-17 Thk Co Ltd Roller retainer
DE10354064A1 (de) 2003-11-19 2005-06-02 Ina-Schaeffler Kg Rollengewindetrieb
WO2009053359A1 (fr) 2007-10-27 2009-04-30 Continental Teves Ag & Co. Ohg Frein de véhicule combiné avec frein de stationnement à actionnement électromécanique
US20120096967A1 (en) * 2010-10-20 2012-04-26 Liu Jouns Roller screw
DE102013202099A1 (de) * 2012-11-30 2014-06-05 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb, insbesondere für eine Feststellbremse eines Kraftfahrzeuges
DE102013206080A1 (de) 2013-02-08 2014-08-28 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb
DE102015201257B3 (de) * 2015-01-26 2016-07-07 Schaeffler Technologies AG & Co. KG Kugelgewindetrieb und zugehöriger elektromechanischer Aktuator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113883245A (zh) * 2020-07-01 2022-01-04 芜湖伯特利汽车安全系统股份有限公司 丝杠传动机构
CN113883196A (zh) * 2020-07-01 2022-01-04 芜湖伯特利汽车安全系统股份有限公司 用于车辆的线控制动执行装置
CN113883196B (zh) * 2020-07-01 2025-09-05 芜湖伯特利汽车安全系统股份有限公司 用于车辆的线控制动执行装置
CN113883245B (zh) * 2020-07-01 2025-09-19 芜湖伯特利汽车安全系统股份有限公司 丝杠传动机构
WO2023169413A1 (fr) * 2022-03-09 2023-09-14 芜湖伯特利汽车安全系统股份有限公司 Mécanisme d'entraînement linéaire
CN116771872A (zh) * 2022-03-09 2023-09-19 芜湖伯特利汽车安全系统股份有限公司 一种直线驱动机构
CN117227381A (zh) * 2023-11-08 2023-12-15 宁波拓普集团股份有限公司 一种直线驱动式主动悬架系统
CN117227381B (zh) * 2023-11-08 2024-03-19 宁波拓普集团股份有限公司 一种直线驱动式主动悬架系统

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