WO2005112232A1 - Device for connecting the rotor of a linear motor to a linear guide - Google Patents

Device for connecting the rotor of a linear motor to a linear guide Download PDF

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Publication number
WO2005112232A1
WO2005112232A1 PCT/EP2005/051744 EP2005051744W WO2005112232A1 WO 2005112232 A1 WO2005112232 A1 WO 2005112232A1 EP 2005051744 W EP2005051744 W EP 2005051744W WO 2005112232 A1 WO2005112232 A1 WO 2005112232A1
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WO
WIPO (PCT)
Prior art keywords
linear motor
motor rotor
linear
guide
rotor
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Application number
PCT/EP2005/051744
Other languages
German (de)
French (fr)
Inventor
Wolfgang Burkart
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2005112232A1 publication Critical patent/WO2005112232A1/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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Definitions

  • the invention relates to a device for connecting a linear motor rotor to a linear guide, in particular in a mounting device for mounting substrates with components.
  • Such a device is shown for example in DE-19842384.
  • the device consists of a carriage, on which two guide carriages are provided, which are supported on corresponding guide rails, which are provided in the stationary guide housing, and a linear motor rotor, which is fastened between the guide carriages directly on the carriage.
  • a linear motor stator is provided in the guide housing so that it faces the linear motor rotor at a short distance. Due to the high magnetic attraction between the rotor and the stator of the linear motor and the high heat development during operation of the linear motor, considerable stresses and deformations of the linear motor rotor and the carriage connected directly to the linear motor rotor can occur. These deformations cause high stresses in the bearings of the linear guide, which can lead to premature wear of the guide.
  • Such linear rotor connections are also used in assembly technology.
  • the barrel agen is often a carrier plate on which, for example, the placement head is mounted. Since the placement machines have to meet the highest requirements in terms of positioning accuracy, deformation of the carrier plate and changes in the guide bearings are highly undesirable. Such deformations can be counteracted with a thicker support plate, but this would result in an increase in the installation space and the mass to be moved, with the corresponding disadvantages for the automatic placement machine.
  • a plate is provided between the linear motor rotor and the carriage, which plate can deform in the direction of the linear motor stator under the action of the magnetic force acting between the linear motor rotor and a linear motor stator.
  • JP-2001169529 discloses a device in which a heat-insulating layer is provided between the linear motor rotor and the carriage.
  • the linear motor rotor is then connected to the mobile assembly part via at least one spacer element.
  • This arrangement creates a space between the linear motor runner and the mobile mounting part, into which the linear motor runner can freely deform or bend without transferring this deformation to the mobile mounting part.
  • the linear motor rotor is fastened on a compensating plate which is connected to the mobile mounting part via the at least one spacer elements, so that the space between the compensating plate and the mounting part is formed. Since the compensating plate is firmly connected to the linear motor runner, the linear motor runner can deform or bend together with the compensating plate in the space provided for it.
  • the compensation plate is used for additional stabilization of the linear motor rotor. Since the compensating plate can be individually adapted to the assembly specifications of the linear motor rotor, e.g. specified assembly holes, it also takes on the function of an adapter for assembly.
  • a plurality of spacer elements can also be provided at a distance from one another on the linear motor rotor or, if appropriate, on the compensating plate.
  • the distance between the spacer elements must be sufficiently large, preferably 80% of the respective edge length of the linear motor rotor or the compensation plate.
  • the spacer elements consist of two strips which are provided essentially parallel to one another on opposite edges of the linear motor rotor or, if appropriate, the compensating plate.
  • the strips can extend over the entire edge length of the linear motor rotor or the compensation plate.
  • the linear motor rotor or the compensation plate can deform in one plane into the space between the strips.
  • spacer elements are provided in the area of the corners of the usually rectangular linear motor rotor or, if appropriate, the compensation plate.
  • the spacer elements can be very dimensioned because they support the linear motor rotor at its corner points. This enables the linear motor rotor or the compensation plate to be deformed in an additional plane.
  • the spacer elements are made of heat-insulating material, so that the heat transfer from the linear motor rotor to the mobile assembly part deteriorates. is tert. As a result, the thermal expansion of the assembly part can be reduced further.
  • a suitable material glass fiber reinforced plastic can be mentioned, which is characterized by low thermal conductivity and good dimensional stability even at high pressures.
  • FIG. 1 shows a schematic side view of a first embodiment of the present invention
  • FIG. 3 is a schematic side view of a second embodiment of the present invention.
  • FIG. 4 illustrates a schematic top view of the second embodiment of the present invention.
  • FIGS. 1 and 2 A first embodiment of the present invention is shown in FIGS. 1 and 2 described in more detail.
  • Figs. 1 and 2 schematically show the structure of a device according to the invention for connecting a linear motor rotor 1 to a linear near guide 2.
  • the device comprises the linear motor runner 1, four essentially cylindrical spacer elements 3, a mobile mounting part in the form of a carrier plate 4 and four guide carriages 5 which act as guide elements 5.
  • the linear motor runner 1, the spacer elements 3 and the guide carriage 5 are on that of the linear guide 2 facing side of the support plate 4 is provided.
  • the four guide carriages 5 are each fastened directly on the carrier plate 4 in the region of the corners of the carrier plate 4, for example by means of screw connections.
  • the guide carriages 5 are constructed in such a way that they can be brought into engagement with rails 6 provided on the linear guide 2. As a result, the device can be displaced in the directions shown by arrows in FIG. 2.
  • the linear motor rotor 1 is connected to the carrier plate 4 in the area of the center of the carrier plate 4 via four spacer elements 3.
  • the spacer elements 3, which are of small dimensions compared to the linear motor rotor 1, are located in the area of the corners of the linear motor rotor 1. This arrangement provides an intermediate space between the linear motor rotor 1 and the carrier plate 4, into which the linear motor rotor 1 can deform or bend.
  • the linear motor rotor 1 When the device is brought into engagement with the rails 6 of the linear guide 2 via the guide carriage 5, the linear motor rotor 1 is at a short distance from a linear motor stator 7 integrated in the housing of the linear guide 2, so that a drive is possible. A strong magnetic attraction acts between the linear motor rotor 1 and the linear motor stator 7, which can lead to deformations of the linear motor rotor 1. Furthermore, thermal stresses and deformations can occur within the linear motor rotor 1 due to the high heat development. Since the linear motor rotor 1 is not attached directly to the carrier plate 4, but due to the mounting on the spacer elements by one If the space is separated from the carrier plate 4, the linear motor rotor can deform freely without the deformations being transferred to the carrier plate 4 in full. As a result, stresses in the bearings of the linear guide 2 can be considerably reduced.
  • the separate spacer elements 3 are replaced by strip-shaped elevations 9, which have already been incorporated or milled into the material of the carrier plate 4.
  • a compensation plate 8 is provided between the elevations 9 and the linear motor rotor 1.
  • the linear motor rotor 1 is fastened on the compensation plate 8, for example by means of screw connections.
  • the compensation plate 8 is in turn attached to the elevations 9, so that the compensation plate 8 and the carrier plate 4 are separated by a space.
  • the compensation plate 8 is used in particular for the additional stabilization of the linear motor rotor 1 and can also be used as an adapter for fastening the linear motor rotor 1, above all, since the mounting holes of the linear motor rotor 1 are usually already specified.
  • linear motor runner 1 linear motor runner 2 linear guide 3 spacer elements 4 carrier plate 5 guide carriage 6 rails 7 linear motor stator 8 compensation plate 9 elevations

Abstract

The invention relates to a device for connecting the rotor (1) of a linear motor to a linear guide (2). Said device comprises a linear motor rotor (2) and a mobile assembly unit (4) on which at least one guide element (5) is provided with which the mobile assembly unit (4) can be engaged with the linear guide (2). The linear motor rotor (1) is provided with at least one spacer element (3) via which the linear motor rotor (1) is connected to the mobile assembly unit (4), thereby defining a space between the linear motor rotor (1) and the mobile assembly unit (4) into which the linear motor rotor (1) can be deformed. Thermal stresses or deformations caused by magnetic forces between the linear motor rotor (1) and the linear motor stator (7) are thus not transmitted onto the bearings of the linear guide (2).

Description

Vorrichtung zum Anbinden eines Linearmotorläufers an eine LinearführungDevice for connecting a linear motor rotor to a linear guide
Die Erfindung betrifft eine Vorrichtung zum Anbinden eines Linearmotorläufers an eine Linearführung, insbesondere in einer Bestückvorrichtung zum Bestücken von Substraten mit Bauelementen.The invention relates to a device for connecting a linear motor rotor to a linear guide, in particular in a mounting device for mounting substrates with components.
Eine derartige Vorrichtung wird beispielsweise in DE-19842384 gezeigt. Die Vorrichtung besteht aus einem Laufwagen, an dem zwei Führungswagen vorgesehen sind, die sich an entsprechenden Führungsschienen, die im stationären Führungsgehäuse vorgesehen sind, abstützen, und einem Linearmotorlaufer, der zwischen den Führungswagen direkt an dem Laufwagen befestigt ist. In dem Führungsgehäuse ist ein Linearmotorstator so vorgesehen, dass er dem Linearmotorlaufer in geringem Abstand gegenübersteht. Aufgrund der hohen magnetischen Anziehungskraft zwischen dem Läufer und dem Stator des Linearmotors und der hohen Wärmeentwicklung bei Betrieb des Linearmotors kann es zu nicht unwesentlichen Spannungen und Verformungen des Linearmotorläufers und des direkt mit dem Linearmotorlaufer verbundenen Laufwagen kommen. Diese Verformungen bewirken in den Lagern der Linearführung hohe Spannungen, was zu einem vorzeitigen Verschleiß der Führung führen kann.Such a device is shown for example in DE-19842384. The device consists of a carriage, on which two guide carriages are provided, which are supported on corresponding guide rails, which are provided in the stationary guide housing, and a linear motor rotor, which is fastened between the guide carriages directly on the carriage. A linear motor stator is provided in the guide housing so that it faces the linear motor rotor at a short distance. Due to the high magnetic attraction between the rotor and the stator of the linear motor and the high heat development during operation of the linear motor, considerable stresses and deformations of the linear motor rotor and the carriage connected directly to the linear motor rotor can occur. These deformations cause high stresses in the bearings of the linear guide, which can lead to premature wear of the guide.
Derartige Linear otoranbindungen finden auch in der Bestückungstechnik ihre Anwendung. Dabei stellt der Lauf agen häufig eine Trägerplatte dar, auf der beispielsweise der Bestückkopf montiert wird. Da die Bestückautomaten höchsten Anforderungen hinsichtlich der Positioniergenauigkeit genügen müssen, sind Verformungen der Trägerplatte und Veränderungen in den Führungslagern höchst unerwünscht. Zwar kann derartigen Verformungen mit einer dicker dimensionierten Trägerplatte begegnet werden, jedoch hätte dies eine Vergrößerung des Einbauraums und der zu bewegenden Masse mit den entsprechenden Nachteilen für den Bestückungsautomaten zur Folge.Such linear rotor connections are also used in assembly technology. The barrel agen is often a carrier plate on which, for example, the placement head is mounted. Since the placement machines have to meet the highest requirements in terms of positioning accuracy, deformation of the carrier plate and changes in the guide bearings are highly undesirable. Such deformations can be counteracted with a thicker support plate, but this would result in an increase in the installation space and the mass to be moved, with the corresponding disadvantages for the automatic placement machine.
In einer durch die Offenlegungsschrift JP-09028074 bekannt gewordenen Vorrichtung ist zwischen dem Linearmotorlaufer und dem Laufwagen eine Platte vorgesehen, die sich unter Einwirkung der zwischen dem Linearmotorlaufer und einem Linearmotorstator wirkenden Magnetkraft in Richtung des Linearmotorstators verformen kann.In a device which has become known from the published patent application JP-09028074, a plate is provided between the linear motor rotor and the carriage, which plate can deform in the direction of the linear motor stator under the action of the magnetic force acting between the linear motor rotor and a linear motor stator.
In der Offenlegungsschrift JP-2001169529 ist eine Vorrichtung offenbart, bei der zwischen dem Linearmotorlaufer und dem Laufwagen eine wärmeisolierende Schicht vorgesehen ist.JP-2001169529 discloses a device in which a heat-insulating layer is provided between the linear motor rotor and the carriage.
Es ist die Aufgabe der vorliegenden Erfindung eine Vorrichtung zum Anbinden eines Linearmotorläufers an eine Linearführung zu liefern, die eine erhöhte Bestückgenauigkeit und eine erhöhte Lebensdauer der Lager der Linearführung aufweist .It is the object of the present invention to provide a device for connecting a linear motor rotor to a linear guide which has an increased placement accuracy and an increased service life of the bearings of the linear guide.
Diese Aufgabe wird durch die Vorrichtung mit den Merkmalen des Anspruch 1 gelöst.This object is achieved by the device with the features of claim 1.
Danach ist der Linearmotorlaufer über mindestens ein Distanzelement mit dem mobilen Montageteil verbunden. Durch diese Anordnung entsteht zwischen dem Linearmotorlaufer und dem mobilen Montageteil ein Zwischenraum, in den sich der Linearmotorlaufer frei verformen bzw. verbiegen kann, ohne dabei diese Verformung auf das mobile Montageteil zu übertragen. Durch die weitgehende Entkopplung des Linearmotorläufers von dem Montageteil bleibt das Montageteil trotz der Verformung des Linearmotorläufers aufgrund hoher Magnetkräfte oder Wärmespannungen in einem nahezu planen Zustand. Spannungen in den Lagern der Linearführung können dadurch weitgehend vermieden werden, was deren Lebensdauer erheblich verlängert . Falls es sich bei dem mobilen Montageteil um eine Trägerplatte mit montiertem Bestückkopf in einem Bestückungsautomaten handelt, wird die Bestückgenauigkeit dadurch deutlich verbessert. Weiterhin kann das Montageteil dünner und leichter ausgelegt werden als bei einer Vorrichtung bei der der Linearmotorlaufer direkt an das Montageteil befestigt ist. Auch müssen in den Lagern der Linearführung keine Ausgleichselemente (z.B. Biegefedern) vorgesehen werden.The linear motor rotor is then connected to the mobile assembly part via at least one spacer element. This arrangement creates a space between the linear motor runner and the mobile mounting part, into which the linear motor runner can freely deform or bend without transferring this deformation to the mobile mounting part. By largely decoupling the linear motor rotor from the Assembly part, despite the deformation of the linear motor rotor due to high magnetic forces or thermal stresses, the assembly part remains in an almost flat state. Tensions in the bearings of the linear guide can thus be largely avoided, which considerably extends their service life. If the mobile assembly part is a carrier plate with an assembled placement head in an automatic placement machine, the placement accuracy is significantly improved. Furthermore, the mounting part can be made thinner and lighter than in a device in which the linear motor rotor is attached directly to the mounting part. In addition, no compensating elements (eg spiral springs) have to be provided in the bearings of the linear guide.
Vorteilhafte Ausgestaltungen der vorliegenden Erfindung sind Gegenstand der abhängigen Ansprüche.Advantageous embodiments of the present invention are the subject of the dependent claims.
Bei der Ausgestaltung der vorliegenden Erfindung gemäß Anspruch 2 ist der Linearmotorlaufer auf einer Ausgleichsplatte befestigt, welche über das mindestens eine Distanzelemente mit dem mobilen Montageteil verbunden ist, sodass der Zwischenraum zwischen der Ausgleichsplatte und dem Montageteil ausgebildet ist. Da die Ausgleichplatte fest mit dem Linearmotorlaufer verbunden ist, kann sich der Linearmotorlaufer zusammen mit der Ausgleichplatte in den dafür vorgesehenen Zwischenraum verformen bzw. verbiegen. Die Ausgleichsplatte dient der zusätzlichen Stabilisierung des Linearmotorläufers. Da die Ausgleichsplatte individuell an die Montagevorgaben des Linearmotorlaufers, z.B. vorgegebene Montagebohrungen, angepasst werden kann, übernimmt sie auch die Funktion eines Adapters für die Montage. Gemäß einer weiteren Ausgestaltung der vorliegenden Erfindung gemäß Anspruch 3 können auch mehrere Distanzelemente in Abstand voneinander an dem Linearmotorlaufer oder gegebenenfalls an der Ausgleichsplatte vorgesehen sein. Um zu gewährleisten, dass sich der Linearmotorlaufer bzw. die Ausgleichsplatte frei in den Zwischenraum verformen können, muss der Abstand zwischen den Distanzelementen ausreichend groß sein, vorzugsweise 80% der jeweiligen Kantenlänge des Linearmotorläufers bzw. der Ausgleichsplatte betragen.In the embodiment of the present invention according to claim 2, the linear motor rotor is fastened on a compensating plate which is connected to the mobile mounting part via the at least one spacer elements, so that the space between the compensating plate and the mounting part is formed. Since the compensating plate is firmly connected to the linear motor runner, the linear motor runner can deform or bend together with the compensating plate in the space provided for it. The compensation plate is used for additional stabilization of the linear motor rotor. Since the compensating plate can be individually adapted to the assembly specifications of the linear motor rotor, e.g. specified assembly holes, it also takes on the function of an adapter for assembly. According to a further embodiment of the present invention, a plurality of spacer elements can also be provided at a distance from one another on the linear motor rotor or, if appropriate, on the compensating plate. In order to ensure that the linear motor rotor or the compensation plate can freely deform into the intermediate space, the distance between the spacer elements must be sufficiently large, preferably 80% of the respective edge length of the linear motor rotor or the compensation plate.
In einer weiteren vorteilhaften Ausgestaltung der vorliegenden Erfindung gemäß Anspruch 4 bestehen die Distanzelemente aus zwei Leisten, die im Wesentlichen parallel zueinander an gegenüberliegenden Kanten des Linearmotorläufers oder gegebenenfalls der Ausgleichsplatte vorgesehen sind. Die Leisten können sich über die gesamte Kantenlänge des Linearmotorläufers bzw. der Ausgleichsplatte erstrecken. Dadurch können sich der Linearmotorlaufer bzw. die Ausgleichsplatte in einer Ebene in den Raum zwischen den Leisten verformen.In a further advantageous embodiment of the present invention according to claim 4, the spacer elements consist of two strips which are provided essentially parallel to one another on opposite edges of the linear motor rotor or, if appropriate, the compensating plate. The strips can extend over the entire edge length of the linear motor rotor or the compensation plate. As a result, the linear motor rotor or the compensation plate can deform in one plane into the space between the strips.
Bei der Ausgestaltung der vorliegenden Erfindung gemäß Anspruch 5 sind vier Distanzelemente im Bereich der Ecken des üblicherweise rechteckigen Linearmotorläufers oder gegebenenfalls der Ausgleichsplatte vorgesehen. Die Distanzelemente können dabei sehr dimensioniert werden, da sie den Linearmotorlaufer an seinen Eckpunkten abstützen. Dadurch wird eine Verformung des Linearmotorläufers bzw. der Ausgleichsplatte in einer zusätzlichen Ebene möglich.In the embodiment of the present invention according to claim 5, four spacer elements are provided in the area of the corners of the usually rectangular linear motor rotor or, if appropriate, the compensation plate. The spacer elements can be very dimensioned because they support the linear motor rotor at its corner points. This enables the linear motor rotor or the compensation plate to be deformed in an additional plane.
Gemäß der vorteilhaften Ausgestaltung der vorliegenden Erfindung gemäß Anspruch 6 sind die Distanzelemente aus wärmeisolierendem Material gefertigt, wodurch die Wärmeübertragung vom Linearmotorlaufer auf das mobile Montageteil verschlech- tert wird. Dadurch kann die Wärmedehnung des Montageteils weiter verringert werden. Als Beispiel für einen geeigneten Werkstoff kann glasfaserverstärkter Kunststoff genannt werden, der sich durch geringe Wärmeleitfähigkeit und gute Formbeständigkeit auch bei hohen Drücken auszeichnet.According to the advantageous embodiment of the present invention according to claim 6, the spacer elements are made of heat-insulating material, so that the heat transfer from the linear motor rotor to the mobile assembly part deteriorates. is tert. As a result, the thermal expansion of the assembly part can be reduced further. As an example of a suitable material, glass fiber reinforced plastic can be mentioned, which is characterized by low thermal conductivity and good dimensional stability even at high pressures.
Gemäß einer weiteren Ausgestaltung der vorliegenden Erfindung gemäß Anspruch 7 sind keine separaten Distanzelemente vorgesehen. Stattdessen sind auf der dem Linearmotorlaufer zugewandten Fläche des mobilen Montageteils entsprechende Erhebungen in das Material des Montageteils eingearbeitet bzw. gefräst .According to a further embodiment of the present invention, no separate spacer elements are provided. Instead, corresponding elevations are machined or milled into the material of the mounting part on the surface of the mobile mounting part facing the linear motor rotor.
Im Folgenden werden zwei vorteilhafte Ausgestaltungen der vorliegenden Erfindung mit Bezug auf die beigefügten Zeichnungen näher erläutert, wobei :Two advantageous configurations of the present invention are explained in more detail below with reference to the accompanying drawings, in which:
Fig. 1 eine schematische Seitenansicht einer ersten Ausgestaltung der vorliegenden Erfindung darstellt,1 shows a schematic side view of a first embodiment of the present invention,
Fig. 2 eine schematische Draufsicht der ersten Ausgestaltung der vorliegenden Erfindung darstellt,2 shows a schematic top view of the first embodiment of the present invention,
Fig. 3 eine schematische Seitenansicht einer zweiten Ausgestaltung der vorliegenden Erfindung darstellt, und3 is a schematic side view of a second embodiment of the present invention, and
Fig. 4 eine schematische Draufsicht der zweiten Ausgestaltung der vorliegenden Erfindung darstellt .4 illustrates a schematic top view of the second embodiment of the present invention.
Ein erstes Ausführungsbeispiel der vorliegenden Erfindung wird anhand der Figs. 1 und 2 näher beschrieben. Figs . 1 und 2 zeigen schematisch den Aufbau einer erfindungsgemäßen Vorrichtung zur Anbindung eines Linearmotorläufers 1 an eine Li- nearführung 2. Die Vorrichtung umfasst den Linearmotorlaufer 1, vier im Wesentlichen zylinderförmige Distanzelemente 3, ein mobiles Montageteil in Form einer Trägerplatte 4 und vier als Führungselemente fungierende Führungswagen 5. Der Linearmotorlaufer 1, die Distanzelemente 3 und die Führungswagen 5 sind auf der der Linearführung 2 zugewandten Seite der Trägerplatte 4 vorgesehen. Dabei sind die vier Führungswagen 5 jeweils im Bereich der Ecken der Trägerplatte 4, beispielsweise mittels Schraubverbindungen, direkt auf der Trägerplatte 4 befestigt. Die Führungswagen 5 sind so konstruiert, dass sie mit auf der Linearführung 2 vorgesehenen Schienen 6 in Eingriff gebracht werden können. Dadurch ist die Vorrichtung in die in Fig. 2 durch Pfeile dargestellten Richtungen verschiebbar. Der Linearmotorlaufer 1 ist im Bereich der Mitte der Trägerplatte 4 über vier Distanzelemente 3 mit der Trägerplatte 4 verbunden. Die im Vergleich zum Linearmotorlaufer 1 klein dimensionierten Distanzelemente 3 befinden sich dabei im Bereich der Ecken des Linearmotorläufers 1. Durch diese Anordnung ist zwischen dem Linearmotorlaufer 1 -und der Trägerplatte 4 ein Zwischenraum vorhanden, in den sich der Linearmotorlaufer 1 verformen bzw. verbiegen kann. Wenn die Vorrichtung über die Führungswagen 5 mit den Schienen 6 der Linearführung 2 in Eingriff gebracht wird, so steht der Linearmotorlaufer 1 einem im Gehäuse der Linearführung 2 integrierten Linearmotorstator 7 in geringem Abstand gegenüber, sodass ein Antrieb möglich wird. Zwischen dem Linearmotorlaufer 1 und Linearmotorstator 7 wirkt eine starke magnetische Anziehungskraft, wodurch es zu Verformungen des Linearmotorläufers 1 kommen kann. Weiterhin kann es innerhalb des Linearmotorläufers 1 durch die hohe Wärmeentwicklung zu thermischen Spannungen und Verformungen kommen. Da der Linearmotorlaufer 1 nicht direkt an der Trägerplatte 4 befestigt ist, sondern aufgrund der Lagerung auf den Distanzelementen durch einen Zwischenraum von der Trägerplatte 4 getrennt ist, kann sich der Linearmotorlaufer frei verformen ohne dass die Verformungen in vollem Maße auf die Trägerplatte 4 übertragen werden. Dadurch können Spannungen in den Lagern der Linearführung 2 erheblich vermindert werden.A first embodiment of the present invention is shown in FIGS. 1 and 2 described in more detail. Figs. 1 and 2 schematically show the structure of a device according to the invention for connecting a linear motor rotor 1 to a linear near guide 2. The device comprises the linear motor runner 1, four essentially cylindrical spacer elements 3, a mobile mounting part in the form of a carrier plate 4 and four guide carriages 5 which act as guide elements 5. The linear motor runner 1, the spacer elements 3 and the guide carriage 5 are on that of the linear guide 2 facing side of the support plate 4 is provided. The four guide carriages 5 are each fastened directly on the carrier plate 4 in the region of the corners of the carrier plate 4, for example by means of screw connections. The guide carriages 5 are constructed in such a way that they can be brought into engagement with rails 6 provided on the linear guide 2. As a result, the device can be displaced in the directions shown by arrows in FIG. 2. The linear motor rotor 1 is connected to the carrier plate 4 in the area of the center of the carrier plate 4 via four spacer elements 3. The spacer elements 3, which are of small dimensions compared to the linear motor rotor 1, are located in the area of the corners of the linear motor rotor 1. This arrangement provides an intermediate space between the linear motor rotor 1 and the carrier plate 4, into which the linear motor rotor 1 can deform or bend. When the device is brought into engagement with the rails 6 of the linear guide 2 via the guide carriage 5, the linear motor rotor 1 is at a short distance from a linear motor stator 7 integrated in the housing of the linear guide 2, so that a drive is possible. A strong magnetic attraction acts between the linear motor rotor 1 and the linear motor stator 7, which can lead to deformations of the linear motor rotor 1. Furthermore, thermal stresses and deformations can occur within the linear motor rotor 1 due to the high heat development. Since the linear motor rotor 1 is not attached directly to the carrier plate 4, but due to the mounting on the spacer elements by one If the space is separated from the carrier plate 4, the linear motor rotor can deform freely without the deformations being transferred to the carrier plate 4 in full. As a result, stresses in the bearings of the linear guide 2 can be considerably reduced.
Anhand der Figs. 3 und 4 wird nun ein zweites Ausführungsbei- spiel der vorliegenden Erfindung beschrieben.Based on Figs. 3 and 4, a second embodiment of the present invention will now be described.
In den Figs . 3 und 4 sind gleiche Elemente durch gleiche Bezugszeichen gekennzeichnet. Zur Vermeidung von Wiederholungen werden nur die Unterschiede zum ersten Ausführungsbeispiel beschrieben. Ansonsten treffen die Merkmale des ersten Ausführungsbeispiel analog auch auf das zweite Ausführungsbei- spiel zu.In Figs. 3 and 4, the same elements are identified by the same reference numerals. To avoid repetition, only the differences from the first embodiment are described. Otherwise, the features of the first exemplary embodiment also apply analogously to the second exemplary embodiment.
In dem in den Figs. 3 und 4 dargestellten Ausführungsbeispiel sind die separaten Distanzelemente 3 durch leistenförmige Erhebungen 9 ersetzt, die bereits in das Material der Trägerplatte 4 eingearbeitet bzw. gefräst wurden. Zwischen den Erhebungen 9 und dem Linearmotorlaufer 1 ist eine Ausgleichsplatte 8 vorgesehen. Dabei ist der Linearmotorlaufer 1 auf der Ausgleichsplatte 8 beispielsweise mittels Schraubverbindungen befestigt . Die Ausgleichsplatte 8 ist wiederum auf den Erhebungen 9 befestigt, sodass die Ausgleichsplatte 8 und die Trägerplatte 4 durch einen Zwischenraum getrennt sind. Dadurch können sich der Linearmotorlaufer 1 und die Trägerplatte 4 frei in den Zwischenraum verformen, ohne dabei die Spannungen auf die Trägerplatte 4 zu übertragen. Die Ausgleichsplatte 8 dient insbesondere der zusätzlichen Stabilisierung des Linearmotorläufers 1 und kann auch als Adapter zur Befestigung des Linearmotorlaufer 1 verwendet werden, vor allem, da die Befestigungsbohrungen des Linearmotorlaufer 1 meist schon vorgegeben sind. In the in Figs. 3 and 4 illustrated embodiment, the separate spacer elements 3 are replaced by strip-shaped elevations 9, which have already been incorporated or milled into the material of the carrier plate 4. A compensation plate 8 is provided between the elevations 9 and the linear motor rotor 1. The linear motor rotor 1 is fastened on the compensation plate 8, for example by means of screw connections. The compensation plate 8 is in turn attached to the elevations 9, so that the compensation plate 8 and the carrier plate 4 are separated by a space. As a result, the linear motor rotor 1 and the carrier plate 4 can freely deform into the intermediate space without transmitting the stresses to the carrier plate 4. The compensation plate 8 is used in particular for the additional stabilization of the linear motor rotor 1 and can also be used as an adapter for fastening the linear motor rotor 1, above all, since the mounting holes of the linear motor rotor 1 are usually already specified.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Linearmotorlaufer 2 Linearführung 3 Distanzelemente 4 Trägerplatte 5 Führungswagen 6 Schienen 7 Linearmotorstator 8 Ausgleichsplatte 9 Erhebungen 1 linear motor runner 2 linear guide 3 spacer elements 4 carrier plate 5 guide carriage 6 rails 7 linear motor stator 8 compensation plate 9 elevations

Claims

Patentansprücheclaims
1) Vorrichtung zum Anbinden eines Linearmotorläufers (1) an eine Linearführung (2) , insbesondere in einer Bestückvorrichtung zum Bestücken von Substraten mit Bauelementen, mit1) Device for connecting a linear motor rotor (1) to a linear guide (2), in particular in a fitting device for fitting substrates with components
- einem Linearmotorlaufer (1) , und- A linear motor rotor (1), and
- einem mobilen Montageteil (4) , an dem mindestens ein Führungselement (5) vorgesehen ist, mit welchem das mobile Montageteil (4) mit der Linearführung (2) in Eingriff gebracht werden kann, d a d u r c h g e k e n n z e i c h n e t, d a s s- A mobile assembly part (4), on which at least one guide element (5) is provided, with which the mobile assembly part (4) can be brought into engagement with the linear guide (2), that is, that means
- mindestens ein Distanzelement (3) vorgesehen ist, über das der Linearmotorlaufer (1) mit dem mobilen Montageteil (4) verbunden ist, sodass zwischen dem Linearmotorlaufer (1) und dem mobilen Montageteil (4) ein Zwischenraum besteht, in den sich der Linearmotorlaufer (1) verformen kann.- At least one spacer element (3) is provided, via which the linear motor runner (1) is connected to the mobile mounting part (4), so that there is a space between the linear motor runner (1) and the mobile mounting part (4) into which the linear motor runner is located (1) can deform.
2) Vorrichtung gemäß Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, d a s s der Linearmotorlaufer (1) auf einer Ausgleichsplatte (7) befestigt ist, welche über das mindestens eine Distanzelement (3) mit dem Montageteil (4) verbunden ist, sodass der Zwischenraum zwischen der Ausgleichplatte (7) und dem Montageteil (4) ausgebildet ist.2) Device according to claim 1, characterized in that the linear motor rotor (1) is attached to a compensating plate (7) which is connected to the mounting part (4) via the at least one spacer element (3), so that the space between the compensating plate (7 ) and the mounting part (4) is formed.
3) Vorrichtung gemäß einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, d a s s mehrere Distanzelemente (3) in Abstand voneinander vorgesehen sind. 4) Vorrichtung gemäß Anspruch 3, d a d u r c h g e k e n n z e i c h n e t, d a s s zwei Distanzelemente (3) , bestehend aus zwei Leisten, an gegenüberliegenden Randabschnitten des Linearmotorläufers (1) bzw. der Ausgleichsplatte (7) vorgesehen sind.3) Device according to one of the preceding claims, characterized in that a plurality of spacer elements (3) are provided at a distance from one another. 4) Device according to claim 3, characterized in that two spacer elements (3), consisting of two strips, are provided on opposite edge sections of the linear motor rotor (1) or the compensating plate (7).
5) Vorrichtung gemäß Anspruch 3, d a d u r c h g e k e n n z e i c h n e t, d a s s vier Distanzelemente (3) im Bereich der Ecken des Linearmotorläufers (1) bzw. der Ausgleichsplatte (7) vorgesehen sind.5) Device according to claim 3, d a d u r c h g e k e n n z e i c h n e t, that a s s four spacer elements (3) in the region of the corners of the linear motor rotor (1) or the compensating plate (7) are provided.
6) Vorrichtung gemäß einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, d a s s die Distanzelemente (3) aus wärmeisolierendem Material, insbesondere glasfaserverstärktem Kunststoff, gefertigt sind.6) Device according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t, that the spacers (3) are made of heat-insulating material, in particular glass fiber reinforced plastic.
7) Vorrichtung gemäß einem der Ansprüche 1 bis 5, ' d a d u r c h g e k e n n z e i c h n e t, d a s s anstatt der Distanzelemente (3) entsprechende Erhebungen (9) in der dem Linearmotorlaufer (1) zugewandten Fläche des mobilen Montageteils (4) eingearbeitet sind. 7) Device according to one of claims 1 to 5, ' characterized in that instead of the spacer elements (3) corresponding elevations (9) in the linear motor rotor (1) facing surface of the mobile mounting part (4) are incorporated.
PCT/EP2005/051744 2004-05-07 2005-04-20 Device for connecting the rotor of a linear motor to a linear guide WO2005112232A1 (en)

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DE102004022553 2004-05-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1906722A2 (en) * 2006-09-26 2008-04-02 Siemens Aktiengesellschaft Positioning system with magnetically preloaded linear axis
WO2010083979A1 (en) * 2009-01-22 2010-07-29 Festo Ag & Co. Kg Electrodynamic linear direct drive
DE102009030563A1 (en) 2009-06-26 2011-01-05 Festo Ag & Co. Kg Electro-dynamic linear direct drive i.e. linear rotor motor, for use in automation technology for linearly moving e.g. tool, has bearing device designed for supporting of drive unit against base element, during operation of drive unit
CN112510929A (en) * 2020-11-25 2021-03-16 中国航发沈阳黎明航空发动机有限责任公司 Blind cavity structure interference fit rotor cold-assembling elastic guiding device for assembly

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1906722A2 (en) * 2006-09-26 2008-04-02 Siemens Aktiengesellschaft Positioning system with magnetically preloaded linear axis
EP1906722A3 (en) * 2006-09-26 2010-01-20 Siemens Electronics Assembly Systems GmbH & Co. KG Positioning system with magnetically preloaded linear axis
WO2010083979A1 (en) * 2009-01-22 2010-07-29 Festo Ag & Co. Kg Electrodynamic linear direct drive
DE102009005675A1 (en) 2009-01-22 2010-08-05 Festo Ag & Co. Kg Electrodynamic linear drive
DE102009005675B4 (en) * 2009-01-22 2013-04-25 Festo Ag & Co. Kg Electrodynamic linear drive
DE102009030563A1 (en) 2009-06-26 2011-01-05 Festo Ag & Co. Kg Electro-dynamic linear direct drive i.e. linear rotor motor, for use in automation technology for linearly moving e.g. tool, has bearing device designed for supporting of drive unit against base element, during operation of drive unit
DE102009030563B4 (en) * 2009-06-26 2012-05-03 Festo Ag & Co. Kg Electrodynamic linear direct drive
CN112510929A (en) * 2020-11-25 2021-03-16 中国航发沈阳黎明航空发动机有限责任公司 Blind cavity structure interference fit rotor cold-assembling elastic guiding device for assembly
CN112510929B (en) * 2020-11-25 2023-07-07 中国航发沈阳黎明航空发动机有限责任公司 Blind cavity structure interference fit rotor cold-assembling elastic guide device for assembly

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