DE19646245A1 - Ball screw - Google Patents

Ball screw

Info

Publication number
DE19646245A1
DE19646245A1 DE1996146245 DE19646245A DE19646245A1 DE 19646245 A1 DE19646245 A1 DE 19646245A1 DE 1996146245 DE1996146245 DE 1996146245 DE 19646245 A DE19646245 A DE 19646245A DE 19646245 A1 DE19646245 A1 DE 19646245A1
Authority
DE
Germany
Prior art keywords
ball
nut
balls
ball screw
rigid
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Withdrawn
Application number
DE1996146245
Other languages
German (de)
Inventor
Dennis Walton
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.)
THOMSON IBL Ltd
Original Assignee
THOMSON IBL Ltd
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 THOMSON IBL Ltd filed Critical THOMSON IBL Ltd
Publication of DE19646245A1 publication Critical patent/DE19646245A1/en
Withdrawn legal-status Critical Current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
    • F16H25/2204—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
    • 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
    • F16H2025/249—Special materials or coatings for screws or nuts

Abstract

A ballnut of a re-circulating ballscrew and nut device comprises two parts, namely, an elastic body 10 which provides a degree of radial expansion while remaining rigid in the axial direetion, and an inserted hardened raceway 12 for the balls. The raceway is in the form of a helical band or strip. The nut body may be made of synthetic plastics material.

Description

Die Erfindung betrifft Kugelumlaufspindeln.The invention relates to ball screws.

Kugelumlaufspindeln weisen im allgemeinen eine schraubenförmige Kugellaufrinne auf, die eine Vielzahl von endlos umlaufenden Ku­ geln enthält. Die Kugelführung oder Kugellaufrinne wird durch eine schraubenförmige Nut in der Welle und einer entsprechenden schrau­ benförmigen Nut in der Mutter gebildet.Ball screws generally have a helical shape Ball trough on which a variety of endless revolving Ku gel contains. The ball guide or ball trough is replaced by a helical groove in the shaft and a corresponding screw ben-shaped groove formed in the nut.

Es ist festgestellt worden, daß die Kugelmutter einer solchen Spindelvorrichtung idealerweise ein gewisses Maß an radialer Ela­ stizität oder Ausdehnung bei gleichzeitiger Steifigkeit in axialer Richtung aufweisen sollte. Die vorliegende Erfindung ist demgemäß darauf gerichtet, eine Vorrichtung zu schaffen, die diese Voraus­ setzungen erfüllt.It has been found that the ball nut of such Spindle device ideally a certain amount of radial ela Stity or expansion with simultaneous rigidity in the axial Should have direction. The present invention is accordingly aimed to create a device that advance this settlements met.

Erfindungsgemäß weist die Kugelmutter einer Kugelspindelvorrich­ tung zwei Teile auf, nämlich einen elastischen Körper, der ein gewisses Maß an radialer Elastizität bzw. Ausdehnung zuläßt, wäh­ rend er in axialer Richtung starr (steif) ist, und eine eingesetz­ te, gehärtete Führung für die Kugeln. According to the invention, the ball nut has a ball screw device tion on two parts, namely an elastic body, the one allows a certain amount of radial elasticity or expansion, wäh rend is rigid in the axial direction, and one inserted hardened guide for the balls.  

Ein Beispiel einer erfindungsgemäßen Kugelmutter ist in der Zeich­ nung dargestellt. In der Zeichnung zeigen:An example of a ball nut according to the invention is in the drawing shown. The drawing shows:

Fig. 1 einen Schnitt durch die Kugelmutter gemäß der Er­ findung; Fig. 1 shows a section through the ball nut according to the invention;

Fig. 2 eine Ansicht der in Fig. 1 dargestellten Kugelmut­ ter; und Fig. 2 is a view of the Kugelmut shown in Figure 1 ter; and

Fig. 3 eine vergrößerte Ansicht eines Teils von Fig. 1. Fig. 3 is an enlarged view of a portion of FIG. 1,.

Die in der Zeichnung dargestellte Kugelmutter weist einen Mutter­ körper 10 auf, der aus einem synthetischen Plastikmaterial oder einem anderen elastischen Material besteht, das eine gewisse Aus­ dehnung in radialer Richtung zuläßt, während es axialer Richtung starr bzw. steif ist.The ball nut shown in the drawing has a mother body 10 , which consists of a synthetic plastic material or another elastic material that allows a certain amount of expansion in the radial direction, while it is rigid or rigid in the axial direction.

Eine gehärtete Kugelführung 12 (sichtbar insbesondere in Fig. 3) ist in die innere Oberfläche der Mutter eingesetzt, wobei die Ku­ gelführung die Form eines schraubenförmigen Streifens oder Bandes aufweist, dessen Querschnitt eine Lagerfläche zur Aufnahme der Kugeln einer Kugelumlaufspindel aufweist. Um der Klarheit willen ist die eigentliche Spindel oder Welle in der Zeichnung fortgelas­ sen worden.A hardened ball guide 12 (visible particularly in Fig. 3) is inserted into the inner surface of the nut, wherein the Ku gel guide has the shape of a helical strip or ribbon, the cross section of which has a bearing surface for receiving the balls of a ball screw. For the sake of clarity, the actual spindle or shaft has been omitted from the drawing.

Die zweiteilige Mutter erfüllt die in der Beschreibungseinleitung aufgeführten Voraussetzungen.The two-part mother complies with that in the introduction to the description listed requirements.

Claims (3)

1. Kugelmutter einer Kugelumlaufspindel, dadurch gekennzeichnet, daß sie zwei Teile aufweist, nämlich einen elastischen Körper (10), der ein gewisses Maß an radialer Ausdehnung zuläßt, während er in axialer Richtung starr ist, und eine eingesetz­ te, gehärtete Kugelführung (12) für die Kugeln.1. Ball nut of a ball screw, characterized in that it has two parts, namely an elastic body ( 10 ) which allows a certain amount of radial expansion while being rigid in the axial direction, and an inserted hardened ball guide ( 12 ) for the balls. 2. Kugelmutter nach Anspruch 1, dadurch gekennzeichnet, daß der Mutterkörper (10) aus einem synthetischen Plastikmaterial hergestellt ist.2. Ball nut according to claim 1, characterized in that the nut body ( 10 ) is made of a synthetic plastic material. 3. Kugelmutter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die in der Mutter angeordnete Kugelführung (12) die Form eines schraubenförmigen Streifens oder Bandes aufweist, des­ sen Querschnitt eine Lager fläche zur Aufnahme der Kugeln ei­ ner Kugelumlaufspindel aufweist.3. Ball nut according to claim 1 or 2, characterized in that the ball guide arranged in the nut ( 12 ) has the shape of a helical strip or ribbon, the sen cross-section has a bearing surface for receiving the balls egg ner ball screw.
DE1996146245 1995-11-10 1996-11-08 Ball screw Withdrawn DE19646245A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9523075A GB2307020B (en) 1995-11-10 1995-11-10 Re-circulating ballscrew and nut device

Publications (1)

Publication Number Publication Date
DE19646245A1 true DE19646245A1 (en) 1997-05-15

Family

ID=10783715

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996146245 Withdrawn DE19646245A1 (en) 1995-11-10 1996-11-08 Ball screw

Country Status (2)

Country Link
DE (1) DE19646245A1 (en)
GB (1) GB2307020B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10003619A1 (en) * 2000-01-28 2001-08-09 Rexroth Star Gmbh Nut unit for spherical screw drive has one-piece channel-like ball-conveying strip coil round inner circumferential surface of nut body and supported by support profile of support nut
US20130283953A1 (en) * 2012-04-27 2013-10-31 Kuroda Precision Industries Ltd. Ball screw with an improved end deflector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1070631B (en) * 1976-07-27 1985-04-02 Roltra Spa SCREW COUPLING MOTHER SCREW
SE398544B (en) * 1976-11-19 1977-12-27 Skf Nova Ab DEVICE FOR CONVERSION OF A ROTATION MOVEMENT TO A LONG TURN MOVEMENT
IT1072019B (en) * 1976-11-19 1985-04-10 Roltra Spa BALL MOTOR SCREW TRANSMISSION COUPLING WITH BALL CIRCULATION
IT1143803B (en) * 1977-03-09 1986-10-22 Roltra Spa SCREW COUPLING COUPLING
DE4131486C2 (en) * 1991-09-21 1999-10-21 Schaeffler Waelzlager Ohg Ball screw drive

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10003619A1 (en) * 2000-01-28 2001-08-09 Rexroth Star Gmbh Nut unit for spherical screw drive has one-piece channel-like ball-conveying strip coil round inner circumferential surface of nut body and supported by support profile of support nut
US6484599B2 (en) 2000-01-28 2002-11-26 Rexroth Star Gmbh Nut unit
DE10003619B4 (en) * 2000-01-28 2005-09-08 Rexroth Star Gmbh nut unit
US20130283953A1 (en) * 2012-04-27 2013-10-31 Kuroda Precision Industries Ltd. Ball screw with an improved end deflector
US9464705B2 (en) * 2012-04-27 2016-10-11 Kuroda Precision Industries Ltd. Ball screw with an improved end deflector

Also Published As

Publication number Publication date
GB2307020B (en) 1999-12-08
GB9523075D0 (en) 1996-01-10
GB2307020A (en) 1997-05-14

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Legal Events

Date Code Title Description
8141 Disposal/no request for examination