WO2018036585A1 - Écrou de broche - Google Patents

Écrou de broche Download PDF

Info

Publication number
WO2018036585A1
WO2018036585A1 PCT/DE2017/100661 DE2017100661W WO2018036585A1 WO 2018036585 A1 WO2018036585 A1 WO 2018036585A1 DE 2017100661 W DE2017100661 W DE 2017100661W WO 2018036585 A1 WO2018036585 A1 WO 2018036585A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle nut
blank
deflection
laser
pocket
Prior art date
Application number
PCT/DE2017/100661
Other languages
German (de)
English (en)
Inventor
Torsten Keller
Dieter Adler
Julian JULIAN GÖBEL
Original Assignee
Schaeffler Technologies AG & 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 & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2018036585A1 publication Critical patent/WO2018036585A1/fr

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
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B23K26/382—Removing material by boring or cutting by boring
    • 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
    • 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

Definitions

  • the invention relates to a suitable for a Wälzgewindetrieb, in particular ball screw drive, suitable spindle nut with at least one individual deflection for rolling elements, in particular balls.
  • a ball screw with multiple individual deflections is known for example from DE 10 2013 222 255 A1.
  • deflecting components are designed such that a ball entering a deflecting channel is always guided along the deflecting channel against the channel inner wall.
  • An elastic design of a deflection section of a ball screw with individual deflection is disclosed, for example, in DE 10 2013 215 644 A1.
  • a spindle nut of a ball screw known from DE 10 2009 025 349 A1 has a plurality of deflecting pieces, one of the deflecting pieces additionally being provided with a stop member which limits a rotation of the spindle nut relative to a threaded spindle.
  • a ball screw has become known, the threaded nut is provided with a through hole into which a deflecting body is inserted from radially inside. After insertion of the deflecting excess material in the outer part of the deflecting body is locally melted by an energy source. This can be realized by ultrasound, induction or by means of laser radiation. In the soft or liquid state, the upper part of the Deflection body its shape and makes so after re-solidification of the material removal from the through hole impossible.
  • the invention has for its object to further develop a spindle nut for a Wälzgewinde- drive with single deflection relative to the cited prior art with full functionality, especially under production engineering aspects.
  • a spindle nut with the features of claim 1 and by a manufacturing method according to claim 5.
  • the spindle nut is designed sleeve-shaped in a known basic shape, wherein for the realization of the individual deflection at least one deflection pocket is provided, which breaks through the lateral surface of the spindle nut.
  • a turn steering body used, which is not necessarily made of the same material as the spindle nut.
  • the deflection pocket is a laser-cut, conical opening.
  • the preparation of the aperture by laser has several advantages: The laser machining, the workpiece, that is, a blank from which the spindle nut is to be manufactured, mechanically virtually unburdened. Structures which, in addition to the deflection pocket, must be present in the spindle nut for functional reasons, in particular a thread, can therefore already be completed before the generation of the at least one deflection pocket. Furthermore, the laser processing favors a burr-free design of the deflection bag. Due to the energy input into the workpiece associated with the laser processing, surface properties in the corresponding area of the workpiece can also be influenced in the desired manner.
  • the production of the spindle nut preferably comprises the following steps:
  • a sleeve-shaped blank made of metal, in particular steel is provided; this blank can be produced by forming processes, for example deep-drawing, by machining processes, for example by turning, or by a combination of non-cutting and chip-removing processes,
  • At least one thread is produced on the inner circumference of the sleeve-shaped blank
  • the blank is held by means of a tensioning device
  • At least one conical deflection pocket is produced by means of a laser.
  • the conicity of the deflection pocket is preferably expressed by the fact that straight lines, which are applied at different points of the circumference of the deflection pocket on the wall, have an intersection which coincides with the central axis of the spindle nut.
  • the deflection pocket has cut surfaces produced by laser processing as walls which are aligned in the radial direction with respect to the center axis of the spindle nut.
  • the said straight lines, which are placed at different locations on the cut surfaces are preferably without interruption at the respective cut surface from the inner wall to the outer surface of the spindle nut. This means that the cut surfaces of the inner wall to the outer surface of the spindle nut each tangent to a straight line orthogonal to the central axis.
  • the blank from which the spindle nut is to be manufactured, to be processed by the processing machine pivots the blank during laser processing about its central axis.
  • the laser beam is preferably always directed onto the central axis of the spindle nut.
  • the conicity of the cut surfaces is created solely by the pivoting of the blank during laser processing.
  • the conical cut surfaces favor a simple, safe insertion of deflecting components into the deflection pockets.
  • the processing machine pushes the blank during its rotation along the central axis thereof.
  • the processing machine can be, for example, a machine whose only purpose is to guide the blank during its laser processing.
  • processing machines are suitable for carrying out the method, which allow further processing steps, in particular a machining.
  • the laser is advanced during the limited rotation of the blank required to produce the deflection pockets. Furthermore, combinations of the various process guides are possible, that is, an advance of the blank by the processing machine, combined with a simultaneous or staggered displacement of the laser.
  • the spindle nut together with the deflection components inserted in the deflection pockets is optionally enclosed by a casing, in particular made of plastic.
  • the spindle nut may be either a rotating or a displaceable and simultaneously secured against rotation component of a machine. In the case of a rotary drive of the spindle nut, this may be connected or identical to an externally toothed component, which allows a drive of the spindle nut, for example by means of a belt drive or by means of a gear.
  • an external toothing can be integrated in a casing of the spindle nut.
  • rotation of a co-operating with the spindle nut threaded spindle can be an integral part of the spindle nut or connected to this rotation.
  • Deflection components which are used in the Umlenktaschen can be prepared for example by machining processes, in particular milling, or by forming. Likewise, the production of deflecting components by powder metallurgical methods is possible. In general, either each deflecting pocket can be assigned a separate deflecting component or a common deflecting component can cover a plurality of deflecting pockets.
  • the spindle nut is preferably a ball screw nut, that is to say a component of a ball screw drive. In principle, the spindle nut can also be designed for another roller screw drive, for example a screw drive operating with rollers as rolling elements.
  • the spindle nut can be used, for example, in actuators within a motor vehicle, which convert a rotation into a linear movement. Examples include brake actuators of parking brakes. Likewise, the spindle nut is suitable for use in stationary applications, for example in industrial robots or in building automation.
  • FIG. 1 shows in a symbolized representation the production of a spindle nut
  • Fig. 3 the spindle nut in a perspective view.
  • a generally designated by the reference numeral 1 spindle nut is intended for use in a ball screw, not shown.
  • a ball screw With regard to the basic structure of such a ball screw reference is made to the cited prior art.
  • the spindle nut 1 In the manufacture of the spindle nut 1 is based on a sleeve-shaped blank, which, as illustrated in Fig. 1, is stretched in a processing machine 2 by means of a clamping device 3 such that it is designated by an axis of rotation R, which is the central axis of the blank, that is, corresponds to the later spindle nut 1, is pivotable.
  • each deflection pocket 6 thus has a conical shape.
  • each deflection pieces, not shown, are used, which promote the balls, that is, rolling elements, during operation of the ball screw back into the thread 4.
  • Each ball rolls approximately one full turn in thread 4 before being fed back into it.
  • the entire spindle nut 1 has, as is apparent from Fig. 3, a plurality of such, each formed by a Umlenktasche 6 individual deflections.
  • the individual deflections In comparison to a ball screw, in which balls are conveyed through a return passage through a plurality of threads, the individual deflections have the advantage of a particularly space-saving design of the spindle nut 1 in the radial direction.
  • burr-free transitions between the individual deflection pockets 6 and the lateral surface of the spindle nut 1 designated by 9 are provided without further processing. The same applies to transitions on the inside of the spindle nut 1, in particular between the deflection pocket 6 and the thread 4.

Landscapes

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

Abstract

L'invention concerne un écrou de broche approprié pour une vis à roulement, en particulier pour une vis à billes, présentant au moins un élément de renvoi individuel d'éléments roulants, un nombre de poches de renvoi (6) correspondant au nombre d'éléments de renvoi individuels étant ménagé dans une surface extérieure (9) de l'écrou de broche. Chaque poche de renvoi (6) est réalisée sous la forme d'une ouverture conique découpée au laser.
PCT/DE2017/100661 2016-08-24 2017-08-04 Écrou de broche WO2018036585A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016215910.0 2016-08-24
DE102016215910.0A DE102016215910B3 (de) 2016-08-24 2016-08-24 Spindelmutter

Publications (1)

Publication Number Publication Date
WO2018036585A1 true WO2018036585A1 (fr) 2018-03-01

Family

ID=59811042

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2017/100661 WO2018036585A1 (fr) 2016-08-24 2017-08-04 Écrou de broche

Country Status (2)

Country Link
DE (1) DE102016215910B3 (fr)
WO (1) WO2018036585A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018116898A1 (de) 2018-07-12 2020-01-16 Schaeffler Technologies AG & Co. KG Wälzgewindetrieb

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050172487A1 (en) * 2001-07-19 2005-08-11 Toru Kamiya Method for working nut screw for ball screw
DE102009025349A1 (de) 2009-06-18 2010-12-23 Howaldtswerke-Deutsche Werft Gmbh Unterseeboot
DE102013210220A1 (de) 2013-06-03 2014-12-04 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb
DE102013215644A1 (de) 2013-08-08 2015-02-12 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb
DE102013222255A1 (de) 2013-10-31 2015-05-21 Schaeffler Technologies AG & Co. KG Kugelgewindetrieb

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050172487A1 (en) * 2001-07-19 2005-08-11 Toru Kamiya Method for working nut screw for ball screw
DE102009025349A1 (de) 2009-06-18 2010-12-23 Howaldtswerke-Deutsche Werft Gmbh Unterseeboot
DE102013210220A1 (de) 2013-06-03 2014-12-04 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb
DE102013215644A1 (de) 2013-08-08 2015-02-12 Schaeffler Technologies Gmbh & Co. Kg Kugelgewindetrieb
DE102013222255A1 (de) 2013-10-31 2015-05-21 Schaeffler Technologies AG & Co. KG Kugelgewindetrieb

Also Published As

Publication number Publication date
DE102016215910B3 (de) 2017-11-16

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