EP0264561A2 - Table tiltably mounted on a fixed base member - Google Patents

Table tiltably mounted on a fixed base member Download PDF

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Publication number
EP0264561A2
EP0264561A2 EP87111625A EP87111625A EP0264561A2 EP 0264561 A2 EP0264561 A2 EP 0264561A2 EP 87111625 A EP87111625 A EP 87111625A EP 87111625 A EP87111625 A EP 87111625A EP 0264561 A2 EP0264561 A2 EP 0264561A2
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EP
European Patent Office
Prior art keywords
adjustable table
fixed base
base body
threaded
adjustable
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.)
Granted
Application number
EP87111625A
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German (de)
French (fr)
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EP0264561B1 (en
EP0264561A3 (en
Inventor
Holmer. Dipl.-Ing. Dangschat
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Dr Johannes Heidenhain GmbH
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Dr Johannes Heidenhain GmbH
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Publication of EP0264561A2 publication Critical patent/EP0264561A2/en
Publication of EP0264561A3 publication Critical patent/EP0264561A3/en
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Publication of EP0264561B1 publication Critical patent/EP0264561B1/en
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    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B5/00—Adjusting position or attitude, e.g. level, of instruments or other apparatus, or of parts thereof; Compensating for the effects of tilting or acceleration, e.g. for optical apparatus

Definitions

  • the invention relates to a table which is mounted such that it can be adjusted in height on a fixed base body according to the preamble of claim 1.
  • DE-OS 2 813 407 discloses a table which is adjustably mounted on a solid base body for tilting instruments or measuring devices.
  • This adjustable table is mounted on the fixed base body by means of three adjustment elements, which are arranged rotationally symmetrically to the center of the adjustable table on its periphery.
  • These three adjustment elements are connected to the fixed base body via a tangentially arranged leaf spring as a swivel joint with a tangential axis of rotation and to the adjustable table as a spatial joint via a spherical surface that engages in a corresponding concave recess in the adjustable table.
  • Each adjustment element consists of a support body with a centrally arranged prismatic incision, which is limited by a base plate.
  • this base plate On the outer surface of this base plate is parallel to prismatic incision attached to the leaf spring, which is firmly connected to the fixed base body in the tangential direction.
  • a threaded spindle is attached parallel to the prismatic incision, which engages in a corresponding threaded hole of a cylindrical adjusting bolt, the outer surface of which is free of play in the surfaces of the prismatic incision and the free end of which is provided with the spherical surface which fits into the corresponding concave recess of the adjustable table engages.
  • an internal hexagon is provided in the spherical surface of the adjusting bolt, into which an adjusting tool engages through a recess in the adjustable table.
  • the outer surface of the adjusting bolt is pressed against the surface of the prismatic incision with another leaf spring.
  • two rolling elements are fastened in the outer surface of the base plate of the carrier body, which engage in corresponding conical recesses which are arranged in the fixed base body in the tangential direction and form a swivel joint with a tangential axis of rotation.
  • a cylindrical pin is fastened in the outer surface of the base plate of the support body and engages in a corresponding prismatic recess which is arranged in the fixed base body in the tangential direction.
  • the three adjustment elements can be connected to the adjustable table via a swivel joint with a tangential axis of rotation and to the fixed base body via a spherical surface and a corresponding concave recess as a spatial joint.
  • it is adjustable on the fixed base body
  • the adjustment elements which are composed of several elements, are constructed in a relatively complex manner and have a greater overall height between the adjustable table and the fixed base body;
  • the concave recesses of the adjustable table must be exactly aligned with the fastening grooves for the leaf springs or with the conical recesses or the prismatic recesses in the solid base body, which requires a higher manufacturing effort.
  • the invention is based on the object of making the adjusting elements simpler and with a smaller overall height and increasing the rigidity of the adjustable table on a table with a height-adjustable base body.
  • the advantages achieved by the invention consist in particular in that the simpler construction of the adjusting elements enables cheaper manufacture and assembly and the smaller overall height of the adjusting elements enables a smaller distance between the adjustable table and the fixed base body.
  • This adjustable table is not subject to wear due to point contact, is not decentered and / or twisted neither when setting nor with temperature changes and has a statically determined support and increased rigidity.
  • FIG. 1 shows a table T1, which is adjustably mounted on a fixed base body G1, in a side view and in FIG. 2 in a plan view.
  • the adjustable table T1 has three identical adjustment elements V1, which are rotationally symmetrical to the center, on its periphery, which are fixedly connected on the one hand to the adjustable table T1 and, on the other hand, via a spatial joint to the fixed base body G1.
  • Each adjusting element V1 consists of a threaded bolt GB1, at one end of which a convex spherical surface FV1 and at the other end of which a slot S are provided for engagement by an adjusting tool, not shown.
  • the threaded bolts GB1 are located in continuous threaded holes BB1, which are provided in the adjustable table T1 rotationally symmetrically to its center on the periphery; this engagement of the threaded bolt GB1 in the threaded bore BB1 forms the fixed connection between the adjusting element V1 and the adjustable table T1.
  • each adjustment element V1 has a disk-shaped support element SE1.
  • the convex spherical surfaces FV1 of the three threaded bolts GB1 each engage in concave spherical surfaces FS1 of the three disk-shaped support elements SE1, which rest on the surface OG1 of the solid base body G1 and are freely displaceable in the plane of this surface OG1.
  • the convex spherical surface FV1 of the adjusting element V1 and the concave spherical surface FS1 of the support element SE1 form the spatial joint between the adjusting element V1 and the fixed base body G1.
  • the free displaceability of the support elements SE1 perpendicular to the adjustment direction of the adjustment elements V1 on the surface OG1 of the fixed base body G1 precludes the action of constraining forces on the adjustable table T1 after it has been set, so that the flatness of its surface OT1 for receiving instruments or measuring devices is not impaired becomes.
  • a tension spring Z is provided, which is fastened in any manner in the fixed base body G1, projects through a bore BT in the adjustable table T1 and is held by means of a holding pin HS spanning the bore BT.
  • the tension springs Z are intended to increase the contact force of the adjustable table T1 in addition to its own weight.
  • the fixed connection of the adjusting elements V1 with the adjustable table T1 increases the rigidity of the adjustable table T1, which is further increased by the provision of the tension springs Z, as a result of which there may be a thread play between the threaded bolts GB1 of the adjusting elements V1 and the threaded holes BB1 of the adjustable table T1 is further reduced.
  • the struts ST1 each have a flexible joint BG1 with axes of rotation running parallel to the surface OG1 of the fixed base body G1 at both ends, in order to enable the distance and / or the angular position of the adjustable table T1 with respect to the fixed base body G1 to be set without constraining forces.
  • the three struts ST1 are each formed by a leaf spring, which have lateral cross-sectional reductions as bending joints BG1 at both ends; in a manner not shown, the struts ST1 can also consist of flat bars.
  • FIG. 3 shows an adjustment element V2 in a longitudinal section as a preferred variant of the adjustment element V1 according to FIG. 1.
  • Each of these three adjusting elements V2 consists of a threaded bolt GB2, at the one end of which a concave spherical surface FV2 and at the other end of which two axially extending depressions E are provided symmetrically to the central axis.
  • the threaded bolt GB2 is in one continuous threaded bore BB2, three of which are provided in the adjustable table T2 rotationally symmetrical to its center on the periphery; this engagement of the threaded bolt GB2 in the threaded bore BB2 forms the fixed connection between the adjusting element V2 and the adjustable table T2.
  • each adjustment element V2 has a disk-shaped support element SE2.
  • the concave spherical surfaces FV2 of the three threaded bolts GB2 each engage in convex spherical surfaces FS2 of the three disk-shaped support elements SE2, which rest on the surface OG2 of the solid base body G2 and are freely displaceable in the plane of this surface OG2.
  • the concave spherical surface FV2 of the adjusting element V2 and the convex spherical surface FS2 of the support element SE2 form the spatial joint between the adjusting element V2 and the fixed base body G2.
  • the adjusting element V2 also contains a threaded washer GS, which is arranged at a distance above the threaded bolt GB2 in the threaded bore BB2 of the adjustable table T2 and has two axially running bores B symmetrical to the central axis, which are aligned with the depressions E of the threaded bolt GB2.
  • Driver pins MS engage in the lower halves of the two bores B of the threaded washer GS and in the depressions E of the threaded bolt GB2 for mutual coupling.
  • the upper halves of the two bores B of the threaded washer GS serve to engage an adjusting tool (not shown) for adjusting the distance and / or the angular position of the adjustable table T2 with respect to the fixed base body G2; the free displaceability of the support elements SE2 perpendicular to the adjustment direction of the adjustment elements V2 on the surface OG2 of the fixed base body G2 exclude the action of constraining forces ten on the adjustable table T2 after its adjustment, so that the flatness of its surface OT2 for receiving instruments or measuring devices is not impaired.
  • the threaded washer GS also has a center bore MBS, the threaded bolt GB2 a center bore MBB and the support element SE2 a center bore MBE, through which a clamping screw SS engages in a threaded bore R of the fixed base body G2.
  • the clamping screw SS is tightened so that any thread play between the threaded washer GS and the threaded bore BB2 and between the threaded bolt GB2 and the threaded bore BB2 of the adjustable table T2 is switched off.
  • the fixed connection of the adjusting elements V2 to the adjustable table T2 increases the rigidity of the adjustable table T2, which is further increased by tightening the tensioning screws SS.
  • the diameter of the center bore MBS of the threaded washer GS, the center bore MBB of the threaded bolt GB2 and the center bore MBE of the support element SE2 are dimensioned so that the inner walls of these center bores MBS, MBB, MBE neither when adjusting the adjustable table T2 nor after tightening the clamping screw SS be in contact with the shaft of the clamping screw SS.
  • the tensioning screws SS according to FIG. 3 replace the tension springs Z according to FIG. 1.
  • the struts ST2 each have a flexible joint BG2 with axes of rotation running parallel to the surface OG2 of the fixed base body G2 at both ends, in order to enable the distance and / or the angular position of the adjustable table T2 with respect to the fixed base body G2 to be set without any constraining forces.
  • the three struts ST2 are each formed by a leaf spring, which have lateral cross-sectional reductions as bending joints BG2 at both ends; In a manner not shown, the struts ST2 can also consist of flat bars.
  • the cross-sectional reductions at the two ends of the struts ST1, ST2 each also allow angular mobility of the struts ST1, ST2 with an axis of rotation perpendicular to the surface OG2 of the fixed base body G2 and about an axis of rotation in the longitudinal extent of the struts ST1, ST2.
  • the three adjustment elements V1, V2 can be fixedly connected in a kinematic reversal to the fixed base body G1, G2 and to the adjustable table T1, T2 via one space Lich joint, the spatial joint is connected to the underside UT1, UT2 of the adjustable table T1, T2 perpendicular to the adjustment direction of the adjusting elements V1, V2.
  • more than three adjustment elements can also be provided between the fixed base body and the adjustable table; the adjustable table can have any shape.

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  • Machine Tool Units (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

An adjustable table (T1) of this type is mounted on a fixed base member (G1) by means of three identical adjusting elements (V1) which are arranged in rotational symmetry to the centre of the adjustable table (T1), at the periphery thereof. The adjusting element (V1) consists of a threaded bolt (GB1) in a threaded bore (BB1) of the adjustable table (T1) and of a supporting element (SE1) which rests in a freely displaceable manner on the surface (OG1) of the fixed base member (G1). The threaded bolt (GB1) has a convex spherical surface (FV1) at one end which engages in a concave spherical surface (FS1) of the supporting element (SE1); the other end of the threaded bolt (GB1) possesses a slot (S) for the engagement of an adjusting tool to adjust the distance and/or the angular position of the adjustable table (T1) relative to the fixed base member (G1). To increase rigidity, a tension spring (Z) is assigned to each adjusting element (V1) between the adjustable table (T1) and the fixed base member (G1). To avoid de- centring and twisting during adjustment of the adjustable table (T1), a strut (ST1) with two flexural joints (BG1) is fixed to the adjustable table (T1) and to the fixed base member (G1) by its two ends between each pair of the three adjusting elements (V1). <IMAGE>

Description

Die Erfindung betrifft einen auf einem festen Grundkör­per in der Höhe einstellbar gelagerten Tisch gemäß dem Oberbegriff des Anspruches 1.The invention relates to a table which is mounted such that it can be adjusted in height on a fixed base body according to the preamble of claim 1.

Aus der DE-OS 2 813 407 ist ein auf einem festen Grundkörper einstellbar gelagerter Tisch zum Verkippen von Instrumenten oder von Meßeinrichtungen bekannt. Dieser einstellbare Tisch ist auf dem festen Grundkör­per mittels dreier Verstellelemente gelagert, die rotationssymmetrisch zur Mitte des einstellbaren Tisches an dessen Peripherie angeordnet sind. Diese drei Ver­stellelemente sind mit dem festen Grundkörper über jeweils eine tangential angeordnete Blattfeder als Drehgelenk mit tangentialer Drehachse und mit dem einstellbaren Tisch als räumliches Gelenk über jeweils eine Kugelfläche verbunden, die in eine entsprechende konkave Aussparung des einstellbaren Tisches eingreift Jedes Verstellelement besteht aus einem Trägerkör­per mit einem mittig angeordneten prismatischen Ein­schnitt, der durch eine Grundplatte begrenzt ist. An der Außenfläche dieser Grundplatte ist parallel zum prismatischen Einschnitt die Blattfeder befestigt, die mit dem festen Grundkörper in tangentialer Richtung fest verbunden ist. An der Innenfläche dieser Grund­platte ist parallel zum prismatischen Einschnitt eine Gewindespindel angebracht, die in eine entsprechende Gewindebohrung eines zylindrischen Stellbolzens ein­greift, dessen Außenfläche die Flächen des prisma­tischen Einschnittes spielfrei tangiert und dessen freies Ende mit der Kugelfläche versehen ist, die in die entsprechende konkave Aussparung des einstellbaren Tisches eingreift. Zur Einstellung des einstellbaren Tisches ist in der Kugelfläche des Stellbolzens ein Innen­sechskant vorgesehen, in den ein Einstellwerkzeug durch eine Aussparung im einstellbaren Tisch eingreift. Zur Erhöhung der Steifigkeit wird die Außenfläche des Stellbolzens mit einer weiteren Blattfeder an die Fläche des prismatischen Einschnitts angedrückt. In einer anderen Ausführungsform sind zwei Wälzkörper in der Außenfläche der Grundplatte des Trägerkörpers befestigt, die in entsprechende kegelförmige Aussparungen eingreifen, die im festen Grundkörper in tangentialer Richtung angeordnet sind und ein Drehgelenk mit tangen­tialer Drehachse bilden. In einer weiteren Ausführungs­form eines Drehgelenks mit tangentialer Drehachse ist ein Zylinderstift in der Außenfläche der Grundplatte des Trägerkörpers befestigt, der in eine entsprechende prismatische Aussparung eingreift, die im festen Grund­körper in tangentialer Richtung angeordnet ist. Weiter­hin können die drei Verstellelemente mit dem einstell­baren Tisch über jeweils ein Drehgelenk mit tangentialer Drehachse und mit dem festen Grundkörper über jeweils eine Kugelfläche und eine entsprechende konkave Aus­sparung als räumliches Gelenk verbunden sein. Bei diesem auf dem festen Grundkörper einstellbar gelagerten Tisch sind die aus mehreren Elementen zusammengesetzten Verstellelemente relativ aufwendig aufgebaut und weisen eine größere Bauhöhe zwischen dem einstellbaren Tisch und dem festen Grundkörper auf; zudem müssen die kon­kaven Aussparungen des einstellbaren Tisches exakt mit den Befestigungsnuten für die Blattfedern bzw. mit den kegelförmigen Aussparungen oder den prismatischen Aussparungen im festen Grundkörper fluchten, was einen höheren Fertigungsaufwand bedingt.DE-OS 2 813 407 discloses a table which is adjustably mounted on a solid base body for tilting instruments or measuring devices. This adjustable table is mounted on the fixed base body by means of three adjustment elements, which are arranged rotationally symmetrically to the center of the adjustable table on its periphery. These three adjustment elements are connected to the fixed base body via a tangentially arranged leaf spring as a swivel joint with a tangential axis of rotation and to the adjustable table as a spatial joint via a spherical surface that engages in a corresponding concave recess in the adjustable table.Each adjustment element consists of a support body with a centrally arranged prismatic incision, which is limited by a base plate. On the outer surface of this base plate is parallel to prismatic incision attached to the leaf spring, which is firmly connected to the fixed base body in the tangential direction. On the inner surface of this base plate, a threaded spindle is attached parallel to the prismatic incision, which engages in a corresponding threaded hole of a cylindrical adjusting bolt, the outer surface of which is free of play in the surfaces of the prismatic incision and the free end of which is provided with the spherical surface which fits into the corresponding concave recess of the adjustable table engages. To set the adjustable table, an internal hexagon is provided in the spherical surface of the adjusting bolt, into which an adjusting tool engages through a recess in the adjustable table. To increase the rigidity, the outer surface of the adjusting bolt is pressed against the surface of the prismatic incision with another leaf spring. In another embodiment, two rolling elements are fastened in the outer surface of the base plate of the carrier body, which engage in corresponding conical recesses which are arranged in the fixed base body in the tangential direction and form a swivel joint with a tangential axis of rotation. In a further embodiment of a swivel joint with a tangential axis of rotation, a cylindrical pin is fastened in the outer surface of the base plate of the support body and engages in a corresponding prismatic recess which is arranged in the fixed base body in the tangential direction. Furthermore, the three adjustment elements can be connected to the adjustable table via a swivel joint with a tangential axis of rotation and to the fixed base body via a spherical surface and a corresponding concave recess as a spatial joint. In this case, it is adjustable on the fixed base body The adjustment elements, which are composed of several elements, are constructed in a relatively complex manner and have a greater overall height between the adjustable table and the fixed base body; In addition, the concave recesses of the adjustable table must be exactly aligned with the fastening grooves for the leaf springs or with the conical recesses or the prismatic recesses in the solid base body, which requires a higher manufacturing effort.

Der Erfindung liegt die Aufgabe zugrunde, bei einem auf einem festen Grundkörper in der Höhe einstellbar ge­lagerten Tisch die Verstellelemente einfacher und mit kleinerer Bauhöhe auszubilden sowie die Steifigkeit des einstellbaren Tisches zu erhöhen.The invention is based on the object of making the adjusting elements simpler and with a smaller overall height and increasing the rigidity of the adjustable table on a table with a height-adjustable base body.

Diese Aufgabe wird erfindungsgemäß durch die kennzeich­nenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.

Die mit der Erfindung erzielten Vorteile bestehen ins­besondere darin, daß durch die einfacher aufgebauten Verstellelemente eine preiswertere Fertigung und Mon­tage und durch die kleinere Bauhöhe der Verstellele­mente ein geringerer Abstand zwischen dem einstellbaren Tisch und dem festen Grundkörper ermöglicht werden. Dieser einstellbare Tisch unterliegt keinem Verschleiß durch Punktberührungen, erfährt weder beim Einstellen noch bei Temperaturänderungen eine Dezentrierung und/oder Verdrehung und weist eine statisch bestimmte Auflage und eine erhöhte Steifigkeit auf.The advantages achieved by the invention consist in particular in that the simpler construction of the adjusting elements enables cheaper manufacture and assembly and the smaller overall height of the adjusting elements enables a smaller distance between the adjustable table and the fixed base body. This adjustable table is not subject to wear due to point contact, is not decentered and / or twisted neither when setting nor with temperature changes and has a statically determined support and increased rigidity.

Vorteilhafte Ausbildungen entnimmt man den Unteran­sprüchen.Advantageous training can be found in the subclaims.

Ausführungsbeispiele der Erfindung werden anhand der Zeichnung näher erläutert.Embodiments of the invention are explained in more detail with reference to the drawing.

Es zeigen

  • Figur 1 einen auf einem festen Grundkörper einstellbar gelagerten Tisch in ei­ner Seitenansicht und
  • Figur 2 in einer Draufsicht und
  • Figur 3 ein Verstellelement in einem Längs­schnitt.
Show it
  • Figure 1 is a table on a fixed base adjustable adjustable in a side view
  • Figure 2 in a plan view and
  • Figure 3 shows an adjusting element in a longitudinal section.

In Figur 1 ist ein auf einem festen Grundkörper G1 ein­stellbar gelagerter Tisch T1 in einer Seitenansicht und in Figur 2 in einer Draufsicht dargestellt. Der ein­stellbare Tisch T1 weist rotationssymmetrisch zur Mitte an seiner Peripherie drei gleiche Verstellelemente V1 auf, die einerseits fest mit dem einstellbaren Tisch T1 und andererseits über jeweils ein räumliches Gelenk mit dem festen Grundkörper G1 verbunden sind.FIG. 1 shows a table T1, which is adjustably mounted on a fixed base body G1, in a side view and in FIG. 2 in a plan view. The adjustable table T1 has three identical adjustment elements V1, which are rotationally symmetrical to the center, on its periphery, which are fixedly connected on the one hand to the adjustable table T1 and, on the other hand, via a spatial joint to the fixed base body G1.

Jedes Verstellelement V1 besteht aus einem Gewindebol­zen GB1, an dessem einen Ende eine konvexe Kugelfläche FV1 und an dessem anderen Ende ein Schlitz S zum Ein­griff eines nicht gezeigten Einstellwerkzeuges vorge­sehen sind. Die Gewindebolzen GB1 befinden sich in durchgehenden Gewindebohrungen BB1, die im einstellbaren Tisch T1 rotationssymmetrisch zu seiner Mitte an der Peripherie vorgesehen sind; dieses Eingreifen des Gewindebolzens GB1 in die Gewindebohrung BB1 bildet die feste Verbindung zwischen dem Verstellelement V1 und dem einstellbaren Tisch T1. Ferner weist jedes Ver­stellelement V1 ein scheibenförmiges Stützelement SE1 auf.Each adjusting element V1 consists of a threaded bolt GB1, at one end of which a convex spherical surface FV1 and at the other end of which a slot S are provided for engagement by an adjusting tool, not shown. The threaded bolts GB1 are located in continuous threaded holes BB1, which are provided in the adjustable table T1 rotationally symmetrically to its center on the periphery; this engagement of the threaded bolt GB1 in the threaded bore BB1 forms the fixed connection between the adjusting element V1 and the adjustable table T1. Furthermore, each adjustment element V1 has a disk-shaped support element SE1.

Die konvexen Kugelflächen FV1 der drei Gewindebolzen GB1 greifen jeweils in konkave Kugelflächen FS1 der drei scheibenförmigen Stützelemente SE1 ein, die auf der Oberfläche OG1 des festen Grundkörpers G1 aufliegen und in der Ebene dieser Oberfläche OG1 frei verschieb­bar sind. Die konvexe Kugelfläche FV1 des Verstellele­ments V1 und die konkave Kugelfläche FS1 des Stützele­ments SE1 bilden das räumliche Gelenk zwischen dem Ver­stellelement V1 und dem festen Grundkörper G1. Die freie Verschiebbarkeit der Stützelemente SE1 senkrecht zur Verstellrichtung der Verstellelemente V1 auf der Ober­fläche OG1 des festen Grundkörpers G1 schließt das Ein­wirken von Zwangskräften auf den einstellbaren Tisch T1 nach dessen Einstellung aus, so daß die Ebenheit sei­ner Oberfläche OT1 zur Aufnahme von Instrumenten oder Meßeinrichtungen nicht beeinträchtigt wird.The convex spherical surfaces FV1 of the three threaded bolts GB1 each engage in concave spherical surfaces FS1 of the three disk-shaped support elements SE1, which rest on the surface OG1 of the solid base body G1 and are freely displaceable in the plane of this surface OG1. The convex spherical surface FV1 of the adjusting element V1 and the concave spherical surface FS1 of the support element SE1 form the spatial joint between the adjusting element V1 and the fixed base body G1. The free displaceability of the support elements SE1 perpendicular to the adjustment direction of the adjustment elements V1 on the surface OG1 of the fixed base body G1 precludes the action of constraining forces on the adjustable table T1 after it has been set, so that the flatness of its surface OT1 for receiving instruments or measuring devices is not impaired becomes.

Neben jedem Verstellelement V1 in radialer Richtung ist eine Zugfeder Z vorgesehen, die in beliebiger Weise im festen Grundkörper G1 befestigt ist, im einstellbaren Tisch T1 eine Bohrung BT durchragt und mittels eines die Bohrung BT überspannenden Haltestiftes HS gehaltert ist. Die Zugfedern Z sollen die Auflagekraft des einstell­baren Tisches T1 zusätzlich zu seinem Eigengewicht ver­stärken. Die feste Verbindung der Verstellelemente V1 mit dem einstellbaren Tisch T1 erhöht die Steifigkeit des einstellbaren Tisches T1, die durch das Vorsehen der Zugfedern Z weiter vergrößert wird, wodurch ein even­tuell vorhandenes Gewindespiel zwischen den Gewindebol­zen GB1 der Verstellelemente V1 und den Gewindebohrungen BB1 des einstellbaren Tisches T1 weiter reduziert wird.In addition to each adjusting element V1 in the radial direction, a tension spring Z is provided, which is fastened in any manner in the fixed base body G1, projects through a bore BT in the adjustable table T1 and is held by means of a holding pin HS spanning the bore BT. The tension springs Z are intended to increase the contact force of the adjustable table T1 in addition to its own weight. The fixed connection of the adjusting elements V1 with the adjustable table T1 increases the rigidity of the adjustable table T1, which is further increased by the provision of the tension springs Z, as a result of which there may be a thread play between the threaded bolts GB1 of the adjusting elements V1 and the threaded holes BB1 of the adjustable table T1 is further reduced.

Um beim Einstellen des einstellbaren Tisches T1 auf einen bestimmten Abstand und/oder auf eine bestimmte Winkel­ lage bezüglich des festen Grundkörpers G1 mittels des in die Schlitze S der Verstellelemente V1 ein­greifenden Einstellwerkzeuges eine Verdrehung und/oder Dezentrierung des einstellbaren Tisches T1 bezüglich des festen Grundkörpers G1 ausschließen, sind zwi­schen den drei Verstellelementen V1 tangential an der Peripherie des einstellbaren Tisches T1 zwischen dem einstellbaren Tisch T1 und dem festen Grundkörper G1 pa­rallel zur Oberfläche OG1 des festen Grundkörpers G1 drei Streben ST1 jeweils mit dem einen Ende über ein Distanzelement D1 an der Unterseite UT1 des einstell­baren Tisches T1 und mit dem anderen Ende über ein Distanzelement D1 an der Oberfläche OG1 des festen Grundkörpers G1 befestigt. Nahe den Befestigungspunkten weisen die Streben ST1 an beiden Enden jeweils ein Biegegelenk BG1 mit parallel zur Oberfläche OG1 des festen Grundkörpers G1 verlaufenden Drehachsen auf, um das Einstellen des Abstandes und/oder der Winkel­lage des einstellbaren Tisches T1 bezüglich des festen Grundkörpers G1 zwangskräftefrei zu ermöglichen. Die drei Streben ST1 werden jeweils durch eine Blattfeder gebildet, die an beiden Enden seitliche Querschnitts­verminderungen als Biegegelenke BG1 besitzen; in nicht gezeigter Weise können die Streben ST1 auch aus Flach­stäben bestehen.To when setting the adjustable table T1 to a certain distance and / or to a certain angle position with respect to the fixed base body G1 by means of the adjusting tool engaging in the slots S of the adjustment elements V1 to prevent rotation and / or decentering of the adjustable table T1 with respect to the fixed base body G1, are tangential between the three adjustment elements V1 on the periphery of the adjustable table T1 adjustable table T1 and the fixed base body G1 parallel to the surface OG1 of the fixed base body G1 three struts ST1 each with one end via a spacer element D1 on the underside UT1 of the adjustable table T1 and with the other end via a spacer element D1 on the surface OG1 of fixed body G1 attached. Near the attachment points, the struts ST1 each have a flexible joint BG1 with axes of rotation running parallel to the surface OG1 of the fixed base body G1 at both ends, in order to enable the distance and / or the angular position of the adjustable table T1 with respect to the fixed base body G1 to be set without constraining forces. The three struts ST1 are each formed by a leaf spring, which have lateral cross-sectional reductions as bending joints BG1 at both ends; in a manner not shown, the struts ST1 can also consist of flat bars.

In Figur 3 ist ein Verstellelement V2 in einem Längs­schnitt als bevorzugte Variante des Verstellelementes V1 nach Figur 1 dargestellt. Jedes dieser drei Verstell­elemente V2 besteht aus einem Gewindebolzen GB2, an dessem einen Ende eine konkave Kugelfläche FV2 und an dessem anderen Ende zwei axial verlaufende Ein­senkungen E symmetrisch zur Mittelachse vorgesehen sind. Der Gewindebolzen GB2 befindet sich in einer durchgehenden Gewindebohrung BB2, von denen drei im einstellbaren Tisch T2 rotationssymmetrisch zu seiner Mitte an der Peripherie vorgesehen sind; dieses Ein­greifen des Gewindebolzens GB2 in die Gewindeboh­rung BB2 bildet die feste Verbindung zwischen dem Ver­stellelement V2 und dem einstellbaren Tisch T2. Ferner weist jedes Verstellelement V2 ein scheibenförmiges Stützelement SE2 auf.FIG. 3 shows an adjustment element V2 in a longitudinal section as a preferred variant of the adjustment element V1 according to FIG. 1. Each of these three adjusting elements V2 consists of a threaded bolt GB2, at the one end of which a concave spherical surface FV2 and at the other end of which two axially extending depressions E are provided symmetrically to the central axis. The threaded bolt GB2 is in one continuous threaded bore BB2, three of which are provided in the adjustable table T2 rotationally symmetrical to its center on the periphery; this engagement of the threaded bolt GB2 in the threaded bore BB2 forms the fixed connection between the adjusting element V2 and the adjustable table T2. Furthermore, each adjustment element V2 has a disk-shaped support element SE2.

Die konkaven Kugelflächen FV2 der drei Gewindebolzen GB2 greifen jeweils in konvexe Kugelflächen FS2 der drei scheibenförmigen Stützelemente SE2 ein, die auf der Oberfläche OG2 des festen Grundkörpers G2 auf­liegen und in der Ebene dieser Oberfläche OG2 frei ver­schiebbar sind. Die konkave Kugelfläche FV2 des Ver­stellelements V2 und die konvexe Kugelfläche FS2 des Stützelements SE2 bilden das räumliche Gelenk zwischen dem Verstellelement V2 und dem festen Grundkörper G2.The concave spherical surfaces FV2 of the three threaded bolts GB2 each engage in convex spherical surfaces FS2 of the three disk-shaped support elements SE2, which rest on the surface OG2 of the solid base body G2 and are freely displaceable in the plane of this surface OG2. The concave spherical surface FV2 of the adjusting element V2 and the convex spherical surface FS2 of the support element SE2 form the spatial joint between the adjusting element V2 and the fixed base body G2.

Das Verstellelement V2 enthält noch eine Gewindeschei­be GS, die in einem Abstand über dem Gewindebolzen GB2 in der Gewindebohrung BB2 des einstellbaren Tisches T2 angeordnet ist und zwei axial verlaufende Bohrungen B symmetrisch zur Mittelachse aufweist, die mit den Ein­senkungen E des Gewindebolzens GB2 fluchten. Mitnehmer­stifte MS greifen in die unteren Hälften der beiden Boh­rungen B der Gewindescheibe GS und in die Einsenkungen E des Gewindebolzens GB2 zur gegenseitigen Kopplung ein. Die oberen Hälften der beiden Bohrungen B der Gewinde­scheibe GS dienen zum Eingriff eines nicht gezeigten Einstellwerkzeugs zum Einstellen des Abstandes und/oder der Winkellage des einstellbaren Tisches T2 bezüglich des festen Grundkörpers G2; die freie Verschiebbarkeit der Stützelemente SE2 senkrecht zur Verstellrichtung der Verstellelemente V2 auf der Oberfläche OG2 des festen Grundkörpers G2 schließen das Einwirken von Zwangskräf­ ten auf den einstellbaren Tisch T2 nach dessen Einstel­lung aus, so daß die Ebenheit seiner Oberfläche OT2 zur Aufnahme von Instrumenten oder Meßeinrichtungen nicht beeinträchtigt wird.The adjusting element V2 also contains a threaded washer GS, which is arranged at a distance above the threaded bolt GB2 in the threaded bore BB2 of the adjustable table T2 and has two axially running bores B symmetrical to the central axis, which are aligned with the depressions E of the threaded bolt GB2. Driver pins MS engage in the lower halves of the two bores B of the threaded washer GS and in the depressions E of the threaded bolt GB2 for mutual coupling. The upper halves of the two bores B of the threaded washer GS serve to engage an adjusting tool (not shown) for adjusting the distance and / or the angular position of the adjustable table T2 with respect to the fixed base body G2; the free displaceability of the support elements SE2 perpendicular to the adjustment direction of the adjustment elements V2 on the surface OG2 of the fixed base body G2 exclude the action of constraining forces ten on the adjustable table T2 after its adjustment, so that the flatness of its surface OT2 for receiving instruments or measuring devices is not impaired.

Die Gewindescheibe GS weisen noch eine Mittenbohrung MBS, der Gewindebolzen GB2 eine Mittenbohrung MBB und das Stützelement SE2 eine Mittenbohrung MBE auf, durch die eine Spannschraube SS hindurch in eine Gewindeboh­rung R des festen Grundkörpers G2 eingreift. Nach dem Einstellen des einstellbaren Tisches T2 bezüglich des festen Grundkörpers G2 wird die Spannschraube SS an­gezogen, so daß ein eventuell vorhandenes Gewindespiel zwischen der Gewindescheibe GS und der Gewindeboh­rung BB2 sowie zwischen dem Gewindebolzen GB2 und der Gewindebohrung BB2 des einstellbaren Tisches T2 aus­geschaltet wird. Die feste Verbindung der Verstell­elemente V2 mit dem einstellbaren Tisch T2 erhöht die Steifigkeit des einstellbaren Tisches T2, die durch das Anziehen der Spannschrauben SS weiter vergrößert wird. Die Durchmesser der Mittenbohrung MBS der Gewinde­scheibe GS, der Mittenbohrung MBB des Gewindebolzens GB2 und der Mittenbohrung MBE des Stützelements SE2 sind so bemessen, daß die Innenwände dieser Mittenbohrungen MBS, MBB, MBE weder beim Einstellen des einstellbaren Tisches T2 noch nach dem Anziehen der Spannschraube SS in Kontakt mit dem Schaft der Spannschraube SS stehen. Die Spannschrauben SS nach Figur 3 ersetzen die Zugfedern Z nach Figur 1.The threaded washer GS also has a center bore MBS, the threaded bolt GB2 a center bore MBB and the support element SE2 a center bore MBE, through which a clamping screw SS engages in a threaded bore R of the fixed base body G2. After adjusting the adjustable table T2 with respect to the fixed base body G2, the clamping screw SS is tightened so that any thread play between the threaded washer GS and the threaded bore BB2 and between the threaded bolt GB2 and the threaded bore BB2 of the adjustable table T2 is switched off. The fixed connection of the adjusting elements V2 to the adjustable table T2 increases the rigidity of the adjustable table T2, which is further increased by tightening the tensioning screws SS. The diameter of the center bore MBS of the threaded washer GS, the center bore MBB of the threaded bolt GB2 and the center bore MBE of the support element SE2 are dimensioned so that the inner walls of these center bores MBS, MBB, MBE neither when adjusting the adjustable table T2 nor after tightening the clamping screw SS be in contact with the shaft of the clamping screw SS. The tensioning screws SS according to FIG. 3 replace the tension springs Z according to FIG. 1.

Um beim Einstellen des einstellbaren Tisches T2 auf einen bestimmten Abstand und/oder auf eine bestimmte Winkel­lage bezüglich des festen Grundkörpers G2 mittels des in die beiden Bohrungen B der Gewindeschraube GS ein­greifenden Einstellwerkzeuges eine Verdrehung und/oder Dezentrierung des einstellbaren Tisches T2 bezüglich des festen Grundkörpers G2 auszuschließen, sind zwi­schen den drei Verstellelementen V2 tangential an der Peripherie des einstellbaren Tisches T2 zwischen dem einstellbaren Tisch T2 und dem festen Grundkörper G2 parallel zur Oberfläche OG2 des festen Grund­körpers G2 drei Streben ST2 jeweils mit dem einen Ende über ein Distanzelement D2 an der Unterseite UT2 des einstellbaren Tisches T2 und mit dem anderen Ende über ein Distanzelement D2 an der Oberfläche OG2 des festen Grundkörpers G2 befestigt. Nahe den Befesti­gungspunkten weisen die Streben ST2 an beiden Enden jeweils ein Biegegelenk BG2 mit parallel zur Oberflä­che OG2 des festen Grundkörpers G2 verlaufenden Dreh­achsen auf, um das Einstellen des Abstandes und/oder der Winkellage des einstellbaren Tisches T2 bezüglich des festen Grundkörpers G2 zwangskräftefrei zu er­möglichen. Die drei Streben ST2 werden jeweils durch eine Blattfeder gebildet, die an beiden Enden seit­liche Querschnittsverminderungen als Biegegelenke BG2 besitzen; in nicht dargestellter Weise können die Streben ST2 auch aus Flachstäben bestehen.In order to twist and / or when adjusting the adjustable table T2 to a certain distance and / or to a certain angular position with respect to the fixed base body G2 by means of the adjusting tool engaging in the two bores B of the threaded screw GS Exclude decentration of the adjustable table T2 with respect to the fixed base body G2, between the three adjustment elements V2 tangentially on the periphery of the adjustable table T2 between the adjustable table T2 and the fixed base body G2 parallel to the surface OG2 of the fixed base body G2, three struts ST2 each with the one end is attached via a spacer D2 to the underside UT2 of the adjustable table T2 and the other end is attached to the surface OG2 of the fixed base body G2 via a spacer D2. Near the fastening points, the struts ST2 each have a flexible joint BG2 with axes of rotation running parallel to the surface OG2 of the fixed base body G2 at both ends, in order to enable the distance and / or the angular position of the adjustable table T2 with respect to the fixed base body G2 to be set without any constraining forces. The three struts ST2 are each formed by a leaf spring, which have lateral cross-sectional reductions as bending joints BG2 at both ends; In a manner not shown, the struts ST2 can also consist of flat bars.

Die Querschnittsverminderungen an den beiden Enden der Streben ST1, ST2 erlauben jeweils auch Winkelbeweglich­keiten der Streben ST1, ST2 mit einer Drehachse senkrecht zur Oberfläche OG2 des festen Grundkörpers G2 sowie um eine Drehachse in Längserstreckung der Streben ST1, ST2.The cross-sectional reductions at the two ends of the struts ST1, ST2 each also allow angular mobility of the struts ST1, ST2 with an axis of rotation perpendicular to the surface OG2 of the fixed base body G2 and about an axis of rotation in the longitudinal extent of the struts ST1, ST2.

Weiterhin können in nicht gezeigter Weise die drei Verstellelemente V1, V2 in kinematischer Umkehrung mit dem festen Grundkörper G1, G2 fest verbunden und mit dem einstellbaren Tisch T1, T2 über ein räum­ liches Gelenk verbunden sein, wobei das räumliche Gelenk mit der Unterseite UT1, UT2 des einstellbaren Tisches T1, T2 senkrecht zur Verstellrichtung der Verstellelemente V1, V2 frei verschiebbar verbunden ist.Furthermore, in a manner not shown, the three adjustment elements V1, V2 can be fixedly connected in a kinematic reversal to the fixed base body G1, G2 and to the adjustable table T1, T2 via one space Lich joint, the spatial joint is connected to the underside UT1, UT2 of the adjustable table T1, T2 perpendicular to the adjustment direction of the adjusting elements V1, V2.

In nicht dargestellter Weise können auch mehr als drei Verstellelemente zwischen dem festen Grundkörper und dem einstellbaren Tisch vorgesehen sein; der einstell­bare Tisch kann eine beliebige Form aufweisen.In a manner not shown, more than three adjustment elements can also be provided between the fixed base body and the adjustable table; the adjustable table can have any shape.

Claims (10)

1. Ein auf einem festen Grundkörper in der Höhe einstell­bar gelagerter Tisch zur Aufnahme von Instrumenten oder von Meßeinrichtungen mit mehreren gleichen Ver­stellelementen, die an der Peripherie des einstell­baren Tisches angeordnet und mit dem einstellbaren Tisch oder dem festen Grundkörper fest verbunden so­wie mit dem festen Grundkörper oder dem einstellbaren Tisch über jeweils ein räumliches Gelenk verbunden sind, dadurch gekennzeichnet, daß das räumliche Ge­lenk (FV1, FS1; FV2, FS2) mit dem festen Grundkörper (G1; G2) oder dem einstellbaren Tisch (T1; T2) senk­recht zur Verstellrichtung der Verstellelemente (V1; V2) zweidimensional verschiebbar verbunden ist und daß zwischen dem einstellbaren Tisch (T1; T2) und dem festen Grundkörper (G1; G2) mehrere Streben (ST1; ST2) mit dem einen Ende am einstellbaren Tisch (T1; T2) und mit dem anderen Ende am festen Grund­körper (G1; G2) befestigt sind.1. A on a fixed base body adjustable in height mounted table for receiving instruments or measuring devices with several identical adjustment elements, which are arranged on the periphery of the adjustable table and firmly connected to the adjustable table or the fixed base body and with the fixed base body or the adjustable table are each connected via a spatial joint, characterized in that the spatial joint (FV1, FS1; FV2, FS2) with the fixed base body (G1; G2) or the adjustable table (T1; T2) perpendicular to the direction of adjustment of the adjusting elements (V1; V2) is two-dimensionally displaceably connected and that between the adjustable table (T1; T2) and the fixed base body (G1; G2) several struts (ST1; ST2) with one end on the adjustable table (T1; T2) and with the other end are attached to the fixed base body (G1; G2). 2. Einstellbar gelagerter Tisch nach Anspruch 1, dadurch gekennzeichnet, daß drei Streben (ST1; ST2) tangential an der Peripherie des ein­stellbaren Tisches (T1; T2) zwischen drei Ver­stellelementen (V1; V2) vorgesehen sind, die ro­tationssymmetrisch zur Mitte des einstellbaren Tisches (T1; T2) angeordnet sind.2. Adjustable table according to claim 1, characterized in that three struts (ST1; ST2) are provided tangentially on the periphery of the adjustable table (T1; T2) between three adjusting elements (V1; V2) which are rotationally symmetrical to the center of the adjustable table (T1; T2) are arranged. 3. Einstellbar gelagerter Tisch nach Anspruch 1, da­durch gekennzeichnet, daß das Verstellelement (V1) aus einem Gewindebolzen (GB1) in einer Gewinde­bohrung (BB1) des einstellbaren Tisches (T1) und aus einem verschiebbar auf dem festen Grundkör­per (G1) aufliegenden Stützelement (SE1) besteht und daß eine konvexe Kugelfläche (FV1) am einen Ende des Gewindebolzens (GB1) in eine konkave Ku­gelfläche (FS1) des Stützelements (SE1) eingreift.3. Adjustable table according to claim 1, characterized in that the adjusting element (V1) from a threaded bolt (GB1) in a threaded bore (BB1) of the adjustable table (T1) and from a displaceably on the fixed base body (G1) supporting element ( SE1) and that a convex spherical surface (FV1) at one end of the threaded bolt (GB1) engages in a concave spherical surface (FS1) of the support element (SE1). 4. Einstellbar gelagerter Tisch nach ANspruch 1, da­durch gekennzeichnet, daß das Verstellelement (V2) aus einem Gewindebolzen (GB2) in einer Gewinde­bohrung (BB2) des einstellbaren Tisches (T2) und aus einem verschiebbar auf dem festen Grundkörper (G2) aufliegenden Stützelement (SE2) besteht und daß ei­ne konkave Kugelfläche (FV2) am einen Ende des Ge­windebolzens (GB2) in eine konvexe Kugelfläche (FS2) des Stützelements (SE2) eingreift.4. Adjustable table according to claim 1, characterized in that the adjusting element (V2) from a threaded bolt (GB2) in a threaded bore (BB2) of the adjustable table (T2) and from a displaceably on the fixed base body (G2) supporting element ( SE2) and that a concave spherical surface (FV2) at one end of the threaded bolt (GB2) engages in a convex spherical surface (FS2) of the support element (SE2). 5. Einstellbar gelagerter Tisch nach Anspruch 3, da­durch gekennzeichnet, daß jedem Verstellelement (V1) in radialer Richtung zwischen dem einstellbaren Tisch (T1) und dem festen Grundkörper (G1) eine Zugfeder (Z) zugeordnet ist, die mit dem einen Ende am einstellbaren Tisch (T1) und mit dem anderen Ende am festen Grundkörper (G1) befestigt ist.5. Adjustable table according to claim 3, characterized in that each adjusting element (V1) in the radial direction between the adjustable table (T1) and the fixed base body (G1) is assigned a tension spring (Z) which is adjustable at one end Table (T1) and the other end is attached to the fixed base body (G1). 6. Einstellbar gelagerter Tisch nach Anspruch 3, da­durch gekennzeichnet, daß das andere Ende des Ge­windebolzens (GB1) mit einem Schlitz (S) zum Ein­griff eines Einstellwerkzeuges versehen ist.6. Adjustable table according to claim 3, characterized in that the other end of the threaded bolt (GB1) is provided with a slot (S) for engaging an adjusting tool. 7. Einstellbar gelagerter Tisch nach Anspruch 4, da­durch gekennzeichnet, daß das andere Ende des Ge­windebolzens (GB2) zwei Einsenkungen (E) zur Auf­nahme zweier Mitnehmerstifte (MS) aufweist, die in die unteren Hälften zweier Bohrungen (B) in einer Gewindescheibe (GS) eingreifen, die in einem Abstand von dem Gewindebolzen (GB2) in der Gewindebohrung (BB2) des einstellbaren Tisches (T2) angeordnet ist, und daß eine Spannschraube (SS) durch eine Mitten­bohrung (MBS) der Gewindescheibe (GS), durch eine Mittenbohrung (MBB) des Gewindebolzens (GB2) und durch eine Mittenbohrung (MBE) des Stützelements (SE2) in eine Gewindebohrung (R) des festen Grund­körpers (G2) eingreift.7. Adjustable table according to claim 4, characterized in that the other end of the threaded bolt (GB2) has two depressions (E) for receiving two drive pins (MS) which in the lower halves of two holes (B) in a threaded washer (GS ) engage, which is arranged at a distance from the threaded bolt (GB2) in the threaded bore (BB2) of the adjustable table (T2), and that a clamping screw (SS) through a central bore (MBS) of the threaded washer (GS), through a central bore (MBB) of the threaded bolt (GB2) and through a central bore (MBE) of the support element (SE2) engages in a threaded bore (R) of the fixed base body (G2). 8. Einstellbar gelagerter Tisch nach Anspruch 7, da­durch gekennzeichnet, daß die oberen Hälften der beiden Bohrungen (B) in der Gewindescheibe (GS) zum Eingriff eines Einstellwerkzeuges dienen.8. Adjustable table according to claim 7, characterized in that the upper halves of the two bores (B) in the threaded washer (GS) are used to engage an adjusting tool. 9. Einstellbar gelagerter Tisch nach Anspruch 1, da­durch gekennzeichnet, daß die Streben (ST1; ST2) an beiden Enden jeweils ein Biegegelenk (BG1; BG2) in Form einer Querschnittverminderung aufweisen.9. Adjustable table according to claim 1, characterized in that the struts (ST1; ST2) each have a flexible joint (BG1; BG2) in the form of a reduction in cross section at both ends. 10. Einstellbar gelagerter Tisch nach Anspruch 9, da­durch gekennzeichnet, daß die Streben (ST1; ST2) aus Blattfedern gebildet sind.10. Adjustable table according to claim 9, characterized in that the struts (ST1; ST2) are formed from leaf springs.
EP87111625A 1986-10-22 1987-08-11 Table tiltably mounted on a fixed base member Expired - Lifetime EP0264561B1 (en)

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DE19863635884 DE3635884A1 (en) 1986-10-22 1986-10-22 A TABLE ADJUSTABLE ON A FIXED BASE
DE3635884 1986-10-22

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EP0264561A2 true EP0264561A2 (en) 1988-04-27
EP0264561A3 EP0264561A3 (en) 1989-09-06
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Also Published As

Publication number Publication date
EP0264561B1 (en) 1993-07-21
DE3786634D1 (en) 1993-08-26
EP0264561A3 (en) 1989-09-06
DE3635884C2 (en) 1990-11-15
DE3635884A1 (en) 1988-05-05

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