WO2004100342A1 - Linear guiding element - Google Patents

Linear guiding element Download PDF

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Publication number
WO2004100342A1
WO2004100342A1 PCT/EP2004/004309 EP2004004309W WO2004100342A1 WO 2004100342 A1 WO2004100342 A1 WO 2004100342A1 EP 2004004309 W EP2004004309 W EP 2004004309W WO 2004100342 A1 WO2004100342 A1 WO 2004100342A1
Authority
WO
WIPO (PCT)
Prior art keywords
linear
primary part
guide rails
guide
primary
Prior art date
Application number
PCT/EP2004/004309
Other languages
German (de)
French (fr)
Inventor
Bruno Senger
Original Assignee
Ina-Schaeffler 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 Ina-Schaeffler Kg filed Critical Ina-Schaeffler Kg
Publication of WO2004100342A1 publication Critical patent/WO2004100342A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
    • H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
    • 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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings

Definitions

  • the present invention relates to a linear guide which is provided with a linear motor.
  • Such linear guides which can also be referred to as linear drive units or linear tables, are increasingly used, for example, in machine tool construction and in handling technology.
  • a linear guide has become known from DE 198 42 384 A1, for example, in which guide rails are arranged parallel to one another on a housing. A slide is mounted on these guide rails so as to be linearly movable.
  • a linear motor is arranged between the guide rails.
  • the linear motor comprises a primary part and a secondary part.
  • the primary part is arranged on the carriage.
  • the secondary part is arranged on the housing.
  • electromagnetic forces act between the primary part and the secondary part, which accelerate the slide relative to the housing.
  • This electromagnetic force has a component parallel to the guide rail that accelerates the carriage.
  • a second force component acts across this.
  • This shear force component acts as a normal force and has to be absorbed by the linear roller bearings. If the amount of the effective shear force component is very large, the linear roller bearings must be dimensioned accordingly.
  • the object of the present invention is to provide a linear guide according to the features of the preamble claim 1, in which this disadvantage is eliminated.
  • this object is achieved in that the primary part interacts with two secondary parts arranged on opposite sides of the primary part. Through this symmetrical arrangement of the secondary parts on both sides of the primary part, the lateral force components largely cancel each other out. A special dimensioning of the linear roller bearings with regard to this shear force component can therefore be omitted.
  • a development according to the invention provides that between the primary part and the respective secondary part effective force is effective in a plane which is arranged parallel to a plane in which the guide rail lie.
  • the two transverse force components effective transversely to the direction of movement are preferably opposite and of the same size.
  • the primary part is preferably assigned to the carriage, with the one secondary part being arranged between the one guide rail and the primary part and the other secondary part being arranged between the other guide rail and the primary part, both secondary parts being assigned to the housing.
  • the secondary part is preferably formed by a plurality of permanent magnets arranged one behind the other and parallel to the guide rails.
  • Figure 1 shows a linear guide according to the invention in perspective
  • FIG. 2 shows a section through the linear guide from FIG. 1.
  • two guide rails 1 are screwed onto a housing 2 at a parallel distance from one another.
  • a carriage 3 is mounted on these guide rails 1 by means of linear roller bearings 4 in a linearly movable manner.
  • a linear motor 5 is arranged between the two guide rails 1.
  • Figure 2 shows the structure of the linear motor 5.
  • a primary part 6 is arranged on the carriage 3. On two opposite sides of the primary part 6 are each
  • Secondary parts 7 arranged on the housing 2.
  • the secondary parts 7 are available gend formed by a plurality of one behind the other and to the guide rails 1 parallel magnets 8 arranged in parallel.
  • a force acts between the primary part 6 and the secondary parts 7, which force is effective in a plane that is parallel to a plane in which the guide rails 1 lie.
  • a shear force component F q of this force acts transversely to the guide rails 1.
  • the two shear force components F q which each act between the primary part and the respective secondary part 7, are oppositely directed and of the same size. These shear force components F q cancel each other out and do not load the linear roller bearings 4.

Abstract

Disclosed is a linear guiding element comprising parallel guide rails (1) that are disposed on a housing (2), a carriage (3) which is mounted on the guide rails (1) by means of linear rolling bearings (4) so as to be movable in a linear manner, and a linear motor (5). Said linear motor (5) is placed between the guide rails (1) and is provided with a primary part (6) and a secondary part (7). The primary part (6) cooperates with two secondary parts (7) that are located on opposite sides of the primary part (6).

Description

Linearführung linear guide
Die vorliegende Erfindung betrifft eine Linearführung, die mit einem Linearmotor versehen ist. Derartige Linearführungen, die auch als Linearantriebseinheiten oder Lineartische bezeichnet werden können, finden zunehmend Anwendung beispielsweise im Werkzeugmaschinenbau und in der Handhabungstechnik.The present invention relates to a linear guide which is provided with a linear motor. Such linear guides, which can also be referred to as linear drive units or linear tables, are increasingly used, for example, in machine tool construction and in handling technology.
Aus DE 198 42 384 A1 beispielsweise ist eine Linearführung bekannt geworden, bei der an einem Gehäuse Führungsschienen parallel zueinander angeordnet sind. Auf diesen Führungsschienen ist ein Schlitten linearbeweglich gelagert. Zwischen den Führungsschienen ist ein Linearmotor angeordnet. Der Linearmotor umfasst ein Primärteil und ein Sekundärteil. Das Primärteil ist an dem Schlitten angeordnet. Das Sekundärteil ist an dem Gehäuse angeordnet. In bekannter Weise wirken zwischen den Primärteil und dem Sekundärteil elektromagnetische Kräf- te, die den Schlitten gegenüber dem Gehäuse beschleunigen. Diese elektromagnetische Kraft weist eine Komponente parallel zur Führungsschiene auf, die den Wagen beschleunigt. Eine zweite Kraftkomponente wirkt quer dazu. Diese Querkraftkomponente wirkt als Normalkraft und muss von den Linearwälzlagern aufgefangen werden. Wenn der Betrag der wirksamen Querkraftkomponente sehr groß ist, sind die Linearwälzlager entsprechend größer zu dimensionieren.A linear guide has become known from DE 198 42 384 A1, for example, in which guide rails are arranged parallel to one another on a housing. A slide is mounted on these guide rails so as to be linearly movable. A linear motor is arranged between the guide rails. The linear motor comprises a primary part and a secondary part. The primary part is arranged on the carriage. The secondary part is arranged on the housing. In a known manner, electromagnetic forces act between the primary part and the secondary part, which accelerate the slide relative to the housing. This electromagnetic force has a component parallel to the guide rail that accelerates the carriage. A second force component acts across this. This shear force component acts as a normal force and has to be absorbed by the linear roller bearings. If the amount of the effective shear force component is very large, the linear roller bearings must be dimensioned accordingly.
Aufgabe der vorliegenden Erfindung ist es, eine Linearführung nach den Merkmalen des Oberbegriffs Anspruchs 1 anzugeben, bei der dieser Nachteil behoben ist. Erfindungsgemäß wird diese Aufgabe dadurch gelöst, das das Primärteil mit zwei an gegenüberliegenden Seiten des Primärteiles angeordneten Sekundärteilen zusammenwirkt. Durch diese symmetrische Anordnung der Sekundärteile zu beiden Seiten des Primärteiles heben sich die Querkraftkomponenten weitgehend auf. Eine besondere Dimensionierung die Linearwälzlager mit Rücksicht auf diese Querkraftkomponente kann daher entfallen.The object of the present invention is to provide a linear guide according to the features of the preamble claim 1, in which this disadvantage is eliminated. According to the invention, this object is achieved in that the primary part interacts with two secondary parts arranged on opposite sides of the primary part. Through this symmetrical arrangement of the secondary parts on both sides of the primary part, the lateral force components largely cancel each other out. A special dimensioning of the linear roller bearings with regard to this shear force component can therefore be omitted.
Eine erfindungsgemäße Weiterbildung sieht vor, daß die zwischen dem Primärteil und dem jeweiligen Sekundärteil wirksame Kraft in einer Ebene wirksam ist, die parallel zu einer Ebene angeordnet ist, in der die Führungsschiene liegen. In diesem Fall sind vorzugsweise die beiden quer zur Bewegungsrichtung wirksamen Querkraftkomponenten entgegengerichtet und gleich groß.A development according to the invention provides that between the primary part and the respective secondary part effective force is effective in a plane which is arranged parallel to a plane in which the guide rail lie. In this case, the two transverse force components effective transversely to the direction of movement are preferably opposite and of the same size.
Vorzugsweise ist das Primärteil dem Schlitten zugeordnet, wobei zwischen der einen Führungsschiene und dem Primärteil das eine Sekundärteil und zwischen der anderen Führungsschiene und dem Primärteil das andere Sekundärteil angeordnet ist, wobei beide Sekundärteile dem Gehäuse zugeordnet sind.The primary part is preferably assigned to the carriage, with the one secondary part being arranged between the one guide rail and the primary part and the other secondary part being arranged between the other guide rail and the primary part, both secondary parts being assigned to the housing.
Das Sekundärteil ist vorzugsweise durch eine Vielzahl hintereinander und parallel zu den Führungsschienen angeordneter Permanentmagnete gebildet.The secondary part is preferably formed by a plurality of permanent magnets arranged one behind the other and parallel to the guide rails.
Nachstehend wird die Erfindung anhand eines in zwei Figuren dargestellten Aus- führungsbeispieles näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of an exemplary embodiment shown in two figures. Show it:
Figur 1 eine erfindungsgemäße Linearführung in perspektivischer Darstellung undFigure 1 shows a linear guide according to the invention in perspective and
Figur 2 einen Schnitt durch die Linearführung aus Figur 1.FIG. 2 shows a section through the linear guide from FIG. 1.
Bei der in Figur 1 in perspektivischer Darstellung abgebildeten Linearführung sind zwei Führungsschienen 1 mit parallelem Abstand zueinander auf ein Gehäuse 2 aufgeschraubt. Ein Schlitten 3 ist auf diesen Führungsschienen 1 mittels Linear- Wälzlager 4 linearbeweglich gelagert.In the linear guide depicted in FIG. 1, two guide rails 1 are screwed onto a housing 2 at a parallel distance from one another. A carriage 3 is mounted on these guide rails 1 by means of linear roller bearings 4 in a linearly movable manner.
Zwischen den beiden Führungsschienen 1 ist ein Linearmotor 5 angeordnet.A linear motor 5 is arranged between the two guide rails 1.
Figur 2 zeigt den Aufbau des Linearmotors 5. Ein Primärteil 6 ist an dem Schlitten 3 angeordnet. An zwei gegenüberliegenden Seiten des Primärteils 6 sind jeweilsFigure 2 shows the structure of the linear motor 5. A primary part 6 is arranged on the carriage 3. On two opposite sides of the primary part 6 are each
Sekundärteile 7 an dem Gehäuse 2 angeordnet. Die Sekundärteile 7 sind vorlie- gend durch eine Vielzahl hintereinander und zu den Führungsschienen 1 parallel angeordneter Permanentmagnete 8 gebildet. Zwischen dem Primärteil 6 und den Sekundärteilen 7 wirkt jeweils eine Kraft, die in einer Ebene wirksam ist die parallel zu einer Ebene liegt, in der die Führungsschienen 1 liegen. Eine Querkraftkomponente Fq dieser Kraft wirkt quer zu den Führungsschienen 1. Die beiden Querkraftkomponenten Fq, die jeweils zwischen dem Primärteil und dem jeweiligen Sekundärteil 7 wirken, sind entgegengerichtet und gleich groß. Diese Querkraftkomponente Fq heben sich gegenseitig auf und belasten nicht die Linearwälzlager 4. Secondary parts 7 arranged on the housing 2. The secondary parts 7 are available gend formed by a plurality of one behind the other and to the guide rails 1 parallel magnets 8 arranged in parallel. A force acts between the primary part 6 and the secondary parts 7, which force is effective in a plane that is parallel to a plane in which the guide rails 1 lie. A shear force component F q of this force acts transversely to the guide rails 1. The two shear force components F q , which each act between the primary part and the respective secondary part 7, are oppositely directed and of the same size. These shear force components F q cancel each other out and do not load the linear roller bearings 4.
PositionszahlenlistePosition Number List
Führungsschieneguide rail
Gehäusecasing
Schlittencarriage
Linearwälzlagerlinear bearings
Linearmotorlinear motor
Primärteilprimary part
Sekundärteilsecondary part
Permanentmagnet permanent magnet

Claims

Patentansprüche claims
1. Linearführung, mit an einem Gehäuse (2) parallel zueinander angeordneten Führungsschienen (1 ) , und mit einem Schlitten (3), der an den Führungsschienen (1 ) mittels Linearwälzlager (4) linearbeweglich gelagert ist, und mit einem zwischen den Führungsschienen (1) angeordneten Linearmotor (5), der ein Primärteil (6) und ein Sekundärteil (7) aufweist, dadurch gekennzeichnet, dass das Primärteil (6) mit zwei an gegenüberliegenden Seiten des Primärteiles (6) angeordneten Sekundärteilen (7) zusammenwirkt.1.Linear guide, with guide rails (1) arranged parallel to one another on a housing (2), and with a slide (3) which is mounted on the guide rails (1) by means of linear roller bearings (4) and with one between the guide rails ( 1) arranged linear motor (5), which has a primary part (6) and a secondary part (7), characterized in that the primary part (6) interacts with two secondary parts (7) arranged on opposite sides of the primary part (6).
2. Linearführung nach Anspruch 1 , bei dem die zwischen dem Primärtei! (6) und dem jeweiligen Sekundärteil (7) wirksame Kraft in einer Ebene wirksam ist, die parallel zu einer Ebene angeordnet ist, in der die Führungsschienen (1 ) liegen.2. Linear guide according to claim 1, wherein the between the primary part! (6) and the respective secondary part (7) effective force is effective in a plane which is arranged parallel to a plane in which the guide rails (1) lie.
3. Linearführung nach Anspruch 1 , bei der Querkraftkomponenten FQ der Anziehungskräfte in dieser Ebene und quer zu den Führungsschienen (1 ) wirksam sind, wobei die Querkraftkomponenten zu beiden Seiten des Primärteils (6) gleich groß und einander entgegengerichtet sind.3. Linear guide according to claim 1, in which the shear force components FQ of the attractive forces are effective in this plane and transversely to the guide rails (1), the shear force components on both sides of the primary part (6) being of the same size and opposing each other.
4. Linearführung nach Anspruch 1 , bei der das Primärteil (6) dem Schlitten (3) zugeordnet ist, wobei zwischen der einen Führungsschiene (1) und dem Primärteil (6) das eine Sekundärteil (7) und zwischen der anderen Führungsschiene (1) und dem Primärteil (6) das andere Sekundärteil (7) ange- ordnet ist, wobei beide Sekundärteile (7) dem Gehäuse (2) zugeordnet sind.4. Linear guide according to claim 1, wherein the primary part (6) is assigned to the carriage (3), wherein between the one guide rail (1) and the primary part (6), the one secondary part (7) and between the other guide rail (1) and the primary part (6) is arranged the other secondary part (7), both secondary parts (7) being assigned to the housing (2).
5. Linearführung nach Anspruch 1 , bei dem das Sekundärteil (7) durch eine Vielzahl hintereinander und parallel zu den Führungsschienen (1) angeordneter Permanentmagnete (8) gebildet ist. 5. Linear guide according to claim 1, wherein the secondary part (7) is formed by a plurality of successive and parallel to the guide rails (1) arranged permanent magnets (8).
PCT/EP2004/004309 2003-05-08 2004-04-23 Linear guiding element WO2004100342A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10320423.7 2003-05-08
DE2003120423 DE10320423A1 (en) 2003-05-08 2003-05-08 linear guide

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WO (1) WO2004100342A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009039865A1 (en) * 2007-09-20 2009-04-02 Festo Ag & Co. Kg Electrical direct linear drive device having two guide rails for the linear guidance of a stator having a driven sled
WO2009115332A1 (en) * 2008-03-19 2009-09-24 Schneider Gmbh & Co. Kg Linear drive for a machine tool and method for moving a tool carriage

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
DE102008058916A1 (en) * 2008-11-25 2010-06-02 Wemhöner Systems Technologies AG Linear drive system for portal handling devices used in disk processing industry and in palletization technology, has guide rail and carriage movable on bar-shaped guide rail

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US4839543A (en) * 1988-02-04 1989-06-13 Trilogy Systems Corporation Linear motor
JPH08251904A (en) * 1995-03-10 1996-09-27 Shinko Electric Co Ltd Brake for linear motor
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009039865A1 (en) * 2007-09-20 2009-04-02 Festo Ag & Co. Kg Electrical direct linear drive device having two guide rails for the linear guidance of a stator having a driven sled
US8134258B2 (en) 2007-09-20 2012-03-13 Festo Ag & Co. Kg Electrical direct linear drive device with a stator having two guide rails for the linear guidance of a driven carriage
WO2009115332A1 (en) * 2008-03-19 2009-09-24 Schneider Gmbh & Co. Kg Linear drive for a machine tool and method for moving a tool carriage
US8421281B2 (en) 2008-03-19 2013-04-16 Schneider Gmbh & Co. Kg Linear drive for a machine tool and method for moving a tool carriage

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