CN1247162C - 用于将骨固定器连接到一个纵向杆上的装置 - Google Patents

用于将骨固定器连接到一个纵向杆上的装置 Download PDF

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CN1247162C
CN1247162C CNB008198454A CN00819845A CN1247162C CN 1247162 C CN1247162 C CN 1247162C CN B008198454 A CNB008198454 A CN B008198454A CN 00819845 A CN00819845 A CN 00819845A CN 1247162 C CN1247162 C CN 1247162C
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longitudinal rod
axis
lateral connector
cavity
clamping collet
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CN1454070A (zh
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罗伯特·弗里格
拉乌尔·多纳特
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AO Technology AG
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Synthes AG Chur
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7044—Screws or hooks combined with longitudinal elements which do not contact vertebrae also having plates, staples or washers bearing on the vertebrae
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/66—Alignment, compression or distraction mechanisms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7041—Screws or hooks combined with longitudinal elements which do not contact vertebrae with single longitudinal rod offset laterally from single row of screws or hooks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
    • A61B17/8038—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers the additional component being inserted in the screw head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
    • A61B17/8047—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers wherein the additional element surrounds the screw head in the plate hole

Abstract

一种用于将骨固定器连接到一个纵向杆上的装置，包括：A)一个板状横向连接器(3)，所述板状横向连接器(3)带有一个设计用于与纵向杆(1)接触的顶表面(5)和一个空腔(7)，所述空腔穿过横向连接器(3)；B)一个可容纳于空腔(7)中的、可弹性压缩的夹紧夹头(10)；和C)一个张紧部件(12)，所述张紧部件(12)用于径向撑开空腔(7)中的所述夹紧夹头(10)，其中，D)所述横向连接器(3)包括一个孔(19)，所述孔(19)距空腔(7)有一个距离(31)，并且从顶表面(5)到底表面(6)穿过横向连接器(3)；E)所述装置包括一个纵向杆连接器(13)，所述纵向杆连接器(13)可以容纳于孔(19)中并且包括一个用于容纳一个纵向杆(1)的通道(17)；和F)锁定部件(33)，所述锁定部件(33)用于相对于横向连接器(3)可松脱地固定可插入通道(17)的纵向杆(1)和纵向杆连接器(13)，和G)随着锁定部件(33)的松脱，所述横向连接器(3)可以绕着中心轴线(14)相对于纵向杆连接器(13)转动。

Description

用于将骨固定器连接到一个纵向杆上的装置
技术领域
本发明涉及一种用于将骨固定器连接到一个纵向杆上的装置。
背景技术
在处理脊柱畸形的已有技术中，蒂螺钉(Pedikelschrauben)或牵引钩用于将椎体连接到一个纵向杆上。在其应用之前，该杆被成形为一种特殊的形状，以此来补偿脊柱的畸形。该项技术被证明是成功的，并且同时被认为是至今的现有技术。
尽管有新连接技术的进展，例如采用带有多轴支承以确保螺钉与纵向杆连接的夹头，但是这两个零件在手术中的连接还是有问题，特别是在重度脊柱畸形的情况下尤为如此。其原因在于蒂螺钉头部与纵向承载件之间的固定距离。换句话说，夹头内的螺钉头的多轴支承允许螺钉方向是可变的，但不允许螺钉头与纵向承载件之间距离也是可变的。但是，螺钉头部或牵引钩尾部与纵向承载件之间可变的距离常常是人们想要得到的，因为脊柱相对于纵向杆不可能总是达到百分之百的对准。允许在蒂螺钉或牵引钩与纵向承载件之间有可变距离的这种系统在已有技术中也是已知的。
这种将可拧入到椎体蒂(Pedikel)中的连接蒂螺钉连接到一个纵向杆上的装置已被例如US 5,474,551 FINN所公开。该连接部件包括一个纵向杆连接器，用来将一个横向连接器连接到纵向杆上，该横向连接器可相对于纵向杆在纵向杆和横向连接器的轴向上移动，所述的纵向杆与横向连接器的轴线是相互垂直的。蒂螺钉可绕多轴转动地连接到横向连接器上，并且是这样配置在横向连接器上的，即在其未转动位置蒂螺钉的纵轴线垂直于纵向杆的轴线，同时也垂直于横向连接器的轴线。这种已知的装置带有这样的缺点，即蒂螺钉或蒂牵引钩与纵向杆之间的距离仅仅可以被单向地改变。采用这种单向可变的夹头，纵向杆必须有一个确定的位置，相对于蒂螺钉或蒂牵引钩或在中间或在一侧延伸。其缺点存在于这样的事实中，即在各蒂螺钉或蒂牵引钩与纵向杆之间所需要的距离可能是相当大的，这样才能够使其它的蒂螺钉或蒂牵引钩处于正确的位置。
发明内容
本发明将要提供克服所述缺点的办法。因此，本发明的一个目的是创造一种用来将一个蒂螺钉或一个蒂牵引钩连接到一个纵向杆托架上装置，该装置一方面允许蒂螺钉或蒂牵引钩的多轴支承，另一方面还允许在横向连接器与纵向杆之间的可转动连接，所述的连接可在任何理想的位置上锁定。
根据本发明，上述目的通过一种装置而实现，该装置将一个骨固定器连接到一个纵向杆上。
根据本发明，提出一种用于将骨固定器连接到一个纵向杆上的装置，包括：
A)一个板状横向连接器，所述板状横向连接器具有一个纵轴线、一个用于与纵向杆接触的顶表面、一个底表面和一个空腔，所述空腔从顶表面到底表面穿过横向连接器并且与一个第一轴线同心地延伸，所述第一轴线基本上垂直于纵轴线；
B)一个与一个第二轴线同轴延伸的夹紧夹头，所述夹紧夹头被容纳于空腔中并且可在垂直于第二轴线的方向上弹性地压缩，以便可松脱地将一个骨固定器固定到横向连接器上；和
C)一个张紧部件，所述张紧部件用于径向撑开所述夹紧夹头，并且因此可松脱地将骨固定器固定在空腔中，
其特征在于：
D)所述横向连接器包括一个孔，所述孔从顶表面到底表面穿过横向连接器并且与一个中心轴线同轴，所述中心轴线与纵轴线相交于距第一轴线有一个距离之处并且基本上平行于第一轴线；
E)所述装置包括一个纵向杆连接器，所述纵向杆连接器与中心轴线同轴地容纳于孔中并且包括一个具有一个第三轴线的通道，所述第三轴线基本上垂直于中心轴线，所述通道用于容纳一个纵向杆；和
F)锁定部件，所述锁定部件用于相对于横向连接器可松脱地固定可与第三轴线同轴或平行地插入到通道中的所述纵向杆以及纵向杆连接器，并且
G)随着锁定部件的松脱，所述横向连接器可以绕着中心轴线相对于纵向杆连接器转动。
根据本发明的装置基本上包括一个板状横向连接器，该横向连接器带有一个设计用于与纵向杆接触的顶表面、一个底表面和一个空腔，该空腔从顶表面到底表面穿过该横向连接器，并且与一个第一轴线同轴地延伸，该空腔的作用是容纳一个可径向弹性变形的夹紧夹头。通过该可弹性变形的夹紧夹头和用于将该夹紧夹头弹性撑开的张紧部件，可将骨固定器可松脱地连接到横向连接器上。另外，根据本发明的装置包括一个基本上为圆柱形的纵向杆连接器，该纵向杆连接器可在纵向杆上与所述杆的轴线同轴地移动，并且具有一条与所述杆的轴线垂直的中心轴线、一个与该中心轴线相交的顶端部分和一个与该中心轴线相交的底端部分以及一个通道，该通道垂直于所述中心轴线并且穿过纵向杆连接器，以便容纳纵向杆，根据本发明的装置还包括一个锁紧部件，该锁紧部件包括，例如，一个螺帽，并且可以与中心轴线同轴地旋到纵向杆连接器的顶端部分上，这样通过该纵向杆连接器和螺帽，横向连接器和纵向杆可以可松脱地相互固定。在与空腔有一定距离之处，横向连接器带有一个通孔，该通孔从顶表面延伸到底表面，用于这样容纳纵向杆连接器，即使后者可绕中心轴线转动，这样当螺帽松脱时，横向连接器可相对于纵向杆的轴线转动。
在根据本发明的装置的一个优选实施例中，横向连接器的顶表面是偏置的，以致带有插入的骨固定器和张紧部件的夹紧夹头相对于纵向杆凹入到这样的程度，即使得即便是在夹紧夹头的第二轴线相对于空腔的第一轴线处于其最大转动位置时，横向连接器也可相对于纵向杆的轴线旋转360度。
该空腔的形状最好设计成与第一轴线轴对称的球截形，而夹紧夹头的形状是一个与该空腔的形状互补的球截形并且具有一个第二轴线。夹紧夹头包括一个上部的、与第二轴线相交的顶端表面和一个与第二轴线同轴的、带有一种圆锥内螺纹的圆锥孔，所述圆锥孔从顶端表面穿过夹紧夹头。张紧部件设计成与所述圆锥孔互补的截头圆锥形状并且带有一种圆锥外螺纹，这样，通过将张紧部件旋入圆锥内螺纹中，夹紧夹头被径向撑开并且因此而压靠在空腔的壁上。
在根据本发明的装置的另一个实施例中，夹紧夹头形成了所述头部并且与骨固定器，特别是一个蒂牵引钩成为一个整体，由此可以使装置的结构得以简化。
在根据本发明的装置的另一个实施例中，所述头部是由一个张紧部件形成的，该张紧部件设计为截头圆锥形状并带有圆锥外螺纹并且与骨固定器，特别是一个蒂螺钉成为一个整体。这种配置还可以获得对根据本发明的装置的简单设计。
在根据本发明的装置的另一个实施例中，纵向杆连接器在其底端部分上包括一个圆锥法兰，该圆锥法兰向着所述底端部分扩展并且可以插入到一个与其互补的内圆锥中，该内圆锥形成在横向连接器底表面上的孔中。这样，可将横向连接器固定，使其不能相对于纵向杆连接器旋转。
该圆锥法兰可以包括一个径向齿，这样可以实现在纵向杆连接器和横向连接器之间强化的抗相对转动的固定。
在根据本发明的另一个实施例中，纵向杆连接器包括一个凸缘，在装配状态政，该凸缘靠在横向连接器的顶表面上，从而防止纵向杆连接器在该装置被植入时落到形成在横向连接器上的孔之外。
由本发明所获得的优点基本上包括在以下事实中，即根据本发明的装置可以在带蒂螺钉或蒂牵引钩的夹紧夹头与纵向杆之间建立起连接，该连接可以使夹紧夹头相对于纵向杆的轴线转动。由于横向连接器设计的特点是，与纵向杆和横向连接器之间的连接相比，横向连接器与夹紧夹头之间是偏置的连接，所以夹紧夹头可以相对于纵向杆的轴线旋转360度。横向连接器可以相对于纵向杆被牢固地固定在其任何理想的位置上。一旦达到了脊柱的矫正，该骨固定器，即例如蒂螺钉或蒂牵引钩，就可以处于纵向杆的侧面、中间或紧贴在其下面。这样，采取不变的植入物尺寸，与可单向移动的夹紧夹头相比，可能的矫正距离可以加倍。
附图说明
下面，将参考对几个实施例的局部概略性陈述，更加详细地对本发明以及本发明的进一步改进进行说明。
在附图中：
图1是根据本发明的装置的实施例的一个分解视图；
图2是根据本发明的装置的实施例的一个剖视图；
图3是根据本发明的装置的另一个实施例的一个剖视图；和
图4是根据本发明的装置的另一个实施例的一个剖视图。
具体实施方式
图1显示了一个根据本发明的装置的优选实施例，该装置基本上包括一个板状横向连接器3、一个包括了张紧部件12以便可松脱地固定一个骨固定器2的夹紧夹头10，和一个带有锁定部件33以便可松脱地将纵向杆1固定到横向连接器3上的纵向杆连接器13，其中所述骨固定器2在本实施例中可以是一个骨螺钉。横向连接器3具有一个纵轴线30、一个用于与纵向杆1相接触的顶表面5、一个底表面6和一个从顶表面5到底表面6穿过横向连接器3并且与一个第一轴线11同轴延伸的空腔7，其中所述第一轴线11基本上垂直于纵轴线30。另外，横向连接器3包括一个孔19，该孔19从顶表面5到底表面6穿过横向连接器3并且与一个中心轴线14同轴地延伸，其中所述中心轴线14在与第一轴线11有一个距离31处配置纵轴线30上，并且基本上平行于第一轴线11，所述孔19用于以这样的方式容纳纵向杆连接器13，即使其能够绕中心轴线14转动。夹紧夹头10与第二轴线22同轴。在本实施例中，空腔7的形状设计成与第一轴线11轴对称的球截形，，而夹紧夹头10的形状是一个与该空腔7的形状互补的球截形，这样该夹紧夹头10可以以这样的方式被空腔7所容纳，即它可以绕第一轴线11以及绕两个与该第一轴线垂直的轴线转动并且其在径向上可被弹性压缩，这样就可以将一个骨固定器2可松脱地固定在横向连接器3上。张紧部件12用来径向撑开夹紧夹头10从而将骨固定器2可松脱地固定在空腔7中，该张紧部件12形成了骨固定器2的头部8并且与该骨固定器2成为一个整体，其中该骨固定器2为一个骨螺钉。夹紧夹头10包括一个上部的、与第二轴线22相交的顶端表面20和一个与第二轴线22同轴的、带有一种圆锥内螺纹24的圆锥孔23，该圆锥孔23从顶端表面20穿过夹紧夹头10，这样一个张紧部件12就可以旋入圆锥孔23中，使夹紧夹头10径向撑开，其中张紧部件12的形状为与该圆锥孔23互补的截头圆锥形并且带有一种圆锥外螺纹25。如果例如张紧部件12由设计成骨螺钉形式的骨固定器2的头部8形成，通过将头部8旋入到夹紧夹头10中，所述骨螺钉便被可松脱地固定在横向连接器3上。为了容纳纵向杆1，采用一个纵向杆连接器13，该纵向杆连接器13以这样的方式容纳在孔19中，即它与中心轴线14同轴的延伸，并且它包括一个通道17，该通道17具有一个基本上垂直于中心轴线14的第三轴线32，而纵向杆1可以被容纳于该通道17中。纵向杆连接器13包括一个与中心轴线14相交的顶端部分15和一个与中心轴线14相交的底端部分16，该底端部分16还包括一个法兰35，该法兰35易于固定到板状横向连接器的底表面6上。通道17朝着纵向杆连接器13的顶端部分15打开。为了可松脱地固定纵向杆1，根据本发明的装置包括锁定部件33，在本实施例中该锁定部件33为一个螺帽18(图2)，该螺帽18可以旋到配置在纵向杆连接器13的顶端部分15的外螺纹34(图2)上，从而使插入通道17的纵向杆1平行于第三轴线32，并且纵向杆连接器13相对于横向连接器3可松脱地固定。当锁定部件33松脱时，横向连接器3与纵向杆连接器13可转动地结合。横向连接器3的顶表面5是偏置的，以致带有插入的骨固定器2的头部8和张紧部件12的夹紧夹头10相对于纵向杆1凹入这样的程度，即使得横向连接器3可相对于一个可插入通道17的纵向杆1的轴线4旋转360度。
图2显示了根据本发明的装置的实施例，该实施例与图1所示实施例的不同之处仅在于，夹紧夹头10形成了骨螺钉形式的骨固定器2的头部8，并且与所述骨螺钉成为了一个整体。另外，纵向杆连接器13在其底端部分16上包括一个圆锥法兰26，该圆锥法兰26向着所述底端部分16扩展，即它将并且可以插入到一个与其互补的内圆锥27中，该内圆锥27形成在横向连接器3的底表面6上的孔19中。一个凸缘29配置在纵向杆连接器13上，在装配状态下，该凸缘29靠在横向连接器3的顶表面5上。为了安装纵向杆连接器13，在轴向设有一个槽36，通过这种方式，凸缘29可以被径向压缩到这样的程度，即，使得纵向杆连接器13可以从底表面6插入到孔19中。
图3显示了根据本发明的装置的实施例，该实施例与图2所示实施例的不同之处仅在于，所述骨固定器2是一个蒂牵引钩而不是一个蒂螺钉。
图4显示了根据本发明的装置的实施例，该实施例与图1所示实施例的不同之处仅在于，从垂直于中心轴线14的方向上看，通道17是向着纵向杆连接器13的接触表面打开的。这使得纵向杆1可以从侧面插入纵向杆连接器13中。为了相对于纵向杆连接器13从侧向固定纵向杆1，将一个套筒36从顶端部分15置于纵向杆连接器13上，并且通过旋到外螺纹34上的螺帽38将其牢固地保持在其位置上，其中所述套筒36包括两个平行于中心轴线14的侧壁37。这样纵向杆1被保持在板状横向连接器的顶表面5与套筒36之间的位置上，而侧壁37可以产生一个侧向固定。另外，圆锥法兰26上设有一个径向齿28，从而在纵向杆连接器13和横向连接器3之间被固定，不能够绕中心轴线14转动。

Claims (11)

1.一种用于将骨固定器连接到一个纵向杆上的装置，包括：
A)一个板状横向连接器(3)，所述板状横向连接器(3)具有一个纵轴线(30)、一个用于与纵向杆(1)接触的顶表面(5)、一个底表面(6)和一个空腔(7)，所述空腔从顶表面(5)到底表面(6)穿过横向连接器(3)并且与一个第一轴线(11)同心地延伸，所述第一轴线(11)基本上垂直于纵轴线(30)；
B)一个与一个第二轴线(22)同轴延伸的夹紧夹头(10)，所述夹紧夹头(10)被容纳于空腔(7)中并且可在垂直于第二轴线(22)的方向上弹性地压缩，以便可松脱地将一个骨固定器(2)固定到横向连接器(3)上；和
C)一个张紧部件(12)，所述张紧部件(12)用于径向撑开所述夹紧夹头(10)，并且因此可松脱地将骨固定器(2)固定在空腔(7)中，
其特征在于：
D)所述横向连接器(3)包括一个孔(19)，所述孔(19)从顶表面(5)到底表面(6)穿过横向连接器(3)并且与一个中心轴线(14)同轴，所述中心轴线(14)与纵轴线(30)相交于距第一轴线(11)有一个距离(31)之处并且基本上平行于第一轴线(11)；
E)所述装置包括一个纵向杆连接器(13)，所述纵向杆连接器(13)与中心轴线(14)同轴地容纳于孔(19)中并且包括一个具有一个第三轴线(32)的通道(17)，所述第三轴线(32)基本上垂直于中心轴线(14)，所述通道(17)用于容纳一个纵向杆(1)；和
F)锁定部件(33)，所述锁定部件(33)用于相对于横向连接器(3)可松脱地固定可与第三轴线(32)同轴或平行地插入到通道(17)中的所述纵向杆(1)以及纵向杆连接器(13)，并且
G)随着锁定部件(33)的松脱，所述横向连接器(3)可以绕着中心轴线(14)相对于纵向杆连接器(13)转动。
2.根据权利要求1所述的装置，其特征在于：所述横向连接器(3)的顶表面(5)是偏置的，以致带有插入的骨固定器(2)的头部(8)和张紧部件(12)的夹紧夹头(10)相对于纵向杆(1)凹入这样的程度，即使得横向连接器(3)可相对于可插入通道(17)的所述纵向杆(1)的轴线(4)旋转360度。
3.根据权利要求2所述的装置，其特征在于：所述夹紧夹头(10)形成了所述头部(8)并且与所述骨固定器(2)成为一个整体。
4.根据权利要求2所述的装置，其特征在于：所述张紧部件(12)形成了所述头部(8)并且与所述骨固定器(2)成为一个整体。
5.根据权利要求1到3之一所述的装置，其特征在于：所述空腔(7)的形状设计成与第一轴线(11)轴对称的球截形，而所述夹紧夹头(10)的形状是一个与所述空腔的形状互补的球截形，这样夹紧夹头(10)在空腔(7)中可以绕两个垂直于第一轴线(11)的轴线和所述第二轴线(22)转动。
6.根据权利要求5所述的装置，其特征在于：所述夹紧夹头(10)包括一个上部的、与第二轴线(22)相交的顶端表面(20)和一个与第二轴线(22)同轴的、带有一种圆锥内螺纹(24)的圆锥孔(23)，所述圆锥孔(23)从顶端表面(20)穿过夹紧夹头(10)，所述张紧部件(12)设计成与所述圆锥孔(23)互补的截头圆锥形并且带有一种圆锥外螺纹(25)，这样就可以通过将所述张紧部件(12)旋入到圆锥孔(23)中，使夹紧夹头(10)径向撑开。
7.根据权利要求1到4之一所述的装置，其特征在于：所述纵向杆连接器(13)包括一个上部的、与中心轴线(14)相交的顶端部分(15)和一个下部的、与中心轴线(14)相交的底端部分(16)，所述通道(17)朝着纵向杆连接器(13)的顶端部分(15)打开。
8.根据权利要求1到4之一所述的装置，其特征在于：所述通道(17)在垂直于中心轴线(14)的方向上打开。
9.根据权利要求7所述的装置，其特征在于：所述纵向杆连接器(13)在其底端部分(16)上包括一个圆锥法兰(26)，所述圆锥法兰(26)向着所述底端部分(16)扩展并且可以插入到一个与其互补的内圆锥(27)中，所述内圆锥(27)形成在横向连接器(3)的底表面(6)上的孔(19)中。
10.根据权利要求9所述的装置，其特征在于：所述圆锥法兰(26)包括一个径向齿(28)，从而在纵向杆连接器(13)和横向连接器(3)之间构成一种抗转动的固定。
11.根据权利要求1到4之一所述的装置，其特征在于：所述纵向杆连接器(13)包括一个凸缘(29)，在装配状态下，该凸缘(29)靠在横向连接器(3)的顶表面(5)上。
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MXPA03001628A (es) 2003-06-24
DE50014519D1 (de) 2007-09-06
EP1311198A1 (de) 2003-05-21
ATE367773T1 (de) 2007-08-15
AU2000264233B2 (en) 2004-04-29
KR100773965B1 (ko) 2007-11-08
US6945972B2 (en) 2005-09-20
KR20030026351A (ko) 2003-03-31
US20030149432A1 (en) 2003-08-07
CA2419798A1 (en) 2002-02-28
MY124899A (en) 2006-07-31
CN1454070A (zh) 2003-11-05
AR030330A1 (es) 2003-08-20
EP1311198B1 (de) 2007-07-25
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TW565436B (en) 2003-12-11

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