LU102627B1 - Hollow-cylindrical component for forming a detachable connection with at least one other component and arrangement of such components - Google Patents

Abstract

The invention relates to a hollow-cylindrical component (1-1c) for forming a detachable connection with at least one other component (1-1c) which has a connecting means on at least one end face (2, 4; 2a, 4a). The connecting means expediently comprises webs (7-7b) protruding from the end face (2, 4; 2a, 4a). A form-fitting connection designed in this way is particularly torsionally and positionally stable as well as a precise fit, depending on a web size. The invention also relates to an arrangement of at least two hollow-cylindrical components (1-1c) that are detachably connected to one another, an articulated measuring stand, an adjustable device for holding body parts during a surgical procedure, and a holding and/or clamping device for use in device construction, which each comprise a plurality of hollow cylindrical components (1-1c).

Description

PN LU102627

ON

AN CA WAW-PATENT Description: Nano Scale Machining GmbH, 66280 Sulzbach (Germany) "Hollow-cylindrical component for forming a detachable connection with at least one other component and arrangement of such components" | The invention relates to a hollow-cylindrical component for forming a detachable connection with at least one other component, which has a connecting means on at least one end face, and an arrangement of at least two hollow-cylindrical components that are detachably connected to one another. The invention also relates to an articulated measuring stand, an adjustable device for holding body parts during a surgical procedure and an adjustable holding and/or clamping device for use in device construction, each of which has a number of hollow-cylindrical components according to the invention.

So-called measuring stands are known from use, which have a magnetic base for fastening the stand to a ferromagnetic base, for example on the housing of a cutting machine. An articulated arm is fastened in an articulated manner to the base, with individual joints being able to be locked in place by a locking device. A measuring instrument can be attached and positioned on a free end of the articulated arm facing away from the base and locked in a measuring position.

A disadvantage of known measuring stands is that a high locking force has to be applied, since a non-positive connection is provided in known solutions.

The object of the present invention is to create a hollow-cylindrical component that can be connected to at least one other component in a torsionally stable and positionally accurate manner.

According to the invention, the object is achieved in that the connecting means comprises webs protruding from the end face.

The invention is also based on the object of designing an arrangement of at least two hollow-cylindrical components which are detachably connected to one another and which can be used for various holding and positioning tasks.

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Furthermore, the invention is based on the object of creating an articulated measuring stand, an adjustable NEON device for holding body parts during a surgical intervention and a holding and/or clamping device for use in device construction, which is particularly easy to handle and has a high positional accuracy having.

> | These objects are solved by the features of the independent claims. | The webs are designed to engage in one another with webs of a further hollow-cylindrical component to form a positive connection between the two components. An engaged position, in which the webs of an arrangement of at least two components are in engagement with each other, can be held by a preferably strandférmiges holding means such as a tensioning cable, which is arranged inside the components, so that forces occurring under load that a could cause loosening of the connection is counteracted.

A form-fitting connection designed in this way is particularly torsionally stable and positionally stable as well as a precise fit, depending on a web size. The webs preferably have a width of between 0.1 and 3 mm. The cross-section of the hollow-cylindrical component can be circular, elliptical or angular, for example square, pentagonal, hexagonal or octagonal. The component is preferably circular in cross section. Although it is conceivable that the hollow-cylindrical component is made of plastic or a ceramic material, it is preferably made of a metallic material.

In cross section, the webs can be designed as an equilateral or isosceles triangle, rectangular or trapezoidal. It is conceivable that the webs are flattened on an upper side that faces an adjacent component.

It goes without saying that the webs can have interruptions, ie material cutouts. Advantageously weight is saved with almost unchanged web strength. Each web expediently extends in the radial direction. Although it is conceivable that various webs do not extend over the entire end face in the radial direction, each web preferably extends over the entire end face of the hollow-cylindrical component in the radial direction, ie from an outer edge to an inner edge.

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If the webs extend in the radial direction, a torsionally rigid, detachable connection of Fosse components with different diameters is advantageously possible.

In one embodiment of the invention, a web width increases as the distance from s to the longitudinal axis of the hollow-cylindrical component increases. Advantageously, two detachably connected components are suitable for transmitting a particularly high torque, since the webs are wider at those points at which particularly high torsional forces act.

In a further embodiment of the invention, a web height increases with increasing distance from the longitudinal axis of the hollow-cylindrical component. Due to the increasing web heights, the detachable connection is particularly torsionally and flexurally rigid, since torsion and bending forces increase with increasing distance from the longitudinal axis. The connection holds even under high loads.

In one embodiment of the invention, web flanks are at least partially parallel or oblique to the longitudinal axis of the hollow-cylindrical component. Web flanks are those side areas of the webs on which adjacent webs rest against one another. If the web flanks are parallel to the longitudinal axis, there are no forces acting under torsional loads such as torque transmission that would promote axial displacement of two interconnected components away from each other and which may have to be compensated, for example by a preferably strand-shaped holding means that is inside a Arrangement of hollow cylindrical components is arranged.

If the web flanks are inclined, the components can be manufactured in a simple manner.

25 .

In a further embodiment of the invention, a web side facing an adjacent component is flattened. As a result, a web cross section is trapezoidal. Particularly stable webs are advantageously created. A particularly precise fit to the webs of a neighboring component is possible.

In one embodiment of the invention, a plurality of webs are arranged next to one another in the circumferential direction and a distance between adjacent webs increases with increasing distance from the longitudinal axis of the hollow-cylindrical component. The distance between adjacent webs is the distance from the highest points of the web, which lie on a line extending in the radial direction, to those of an adjacent web.

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The at least one end face is expediently arranged obliquely or perpendicularly to the longitudinal axis SE of the component, with an obliquely arranged end face preferably being at an angle of 22.5° or 45° to the longitudinal axis. ) For the production of components according to the invention are in at least one face whose | s end face perpendicular to the longitudinal axis of a hollow cylindrical, preferably made of metal | formed cylinder is introduced webs.

As a result, a cross-section circular end | side trained.

If the end face is arranged obliquely to the longitudinal axis of a hollow-cylindrical circular cylinder, preferably made of metal, the end face is elliptical.

A component according to the invention with such an end face can be produced, for example, by cutting a circular cylinder blank to a miter and inserting webs into at least the two oblique end faces of the two cut pieces, which are elliptical.

If two components are connected to one another with end faces arranged, for example, at an angle of 45° obliquely to the longitudinal axis, an arrangement of two components which form a right-angled angle piece can be created.

Due to the interlocking webs, such an angle piece can be used to transmit a torque or to hold a surgical device in a stable position.

If an angle is 22.5°, three components can form a right-angled angle piece, for example, with a middle component forming a transition area.

A particularly stable angle piece is advantageously created.

Depending on the number of webs and an angle of rotation by which a first hollow-cylindrical component with an end face arranged obliquely to the longitudinal axis is rotated about its longitudinal axis relative to a neighboring component, two or more interconnected hollow-cylindrical components can be spatially arranged so that this arrangement can form an adjustable, articulated measuring stand, a spatially adjustable device for holding body parts during a surgical procedure, or a spatially adjustable holding and/or clamping device for use in device construction.

Adjacent components can be arranged in a number of locking stages, with a number of possible locking stages corresponding to a number of webs.

For example, a spatial arrangement of three components, each with twenty teeth, can be arranged in twenty by twenty, that is to say a total of 400 different latching steps. 3 The more webs the components and the greater the number of components, the more spatial arrangements are possible.

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In one embodiment of the invention, a web-free connecting means is provided on a HORB end face opposite the first end face, which is set up to form a non-positive and/or positive connection with a further component. Such a connecting means can be, for example, a receiving device, through which, for example, attachment to another, in particular dissimilar, component is possible, for example to a wall or a pedestal. Such a component can form a beginning or end part of an arrangement of several components.

Expediently, a holding means, through which an arrangement of at least two hollow-cylindrical components that are detachably connected to one another in an engagement position in which webs of a connecting means of the components are brought into engagement with one another, is in the form of a strand educated.

A cord-like holding means can be a tensionable rope, for example a wire rope, which extends inside the components through all the components and is led to the outside at end parts of an arrangement of several components.

In order to avoid an unintentional loosening of the connection, the cable can advantageously be tensioned and relaxed to loosen the connection. The prestress advantageously prevents forces with an axial component occurring, for example in the case of torsional loading, which promote an unintentional loosening of the connection between two adjacent components.

It goes without saying that the holding means can have a plurality of holding means sections connected to one another, with each holding means section connecting two adjacent components of an arrangement made up of several components to one another. Advantageously, in order to release a connection between two adjacent components, the holding means does not have to be released completely, but only the associated holding means section. A particularly stable arrangement is advantageously formed, which is only weakened at those points at which a change in the position of adjacent components is necessary. This can be the case, for example, when repositioning an articulated measuring stand, a holding and/or clamping device for use in device construction, or an adjustable device for holding body parts during a surgical intervention.

An articulated measuring stand according to the invention comprises a plurality of hollow-cylindrical components which form an articulation in pairs. The webs of adjacent components are in engagement with one another, so that a non-rotatable, ie torsionally stable, precisely fitting and detachable connection is formed. If adjacent components are moved away from each other in the axial direction Page 5/9, the webs no longer interlock and the components can be rotated relative to each other. If some have an end face arranged obliquely to the longitudinal axis, a free end of the measuring stand can be moved into a certain spatial position by suitable rotation of individual components, in which the webs are again brought into the engagement position s and held by a holding means. In this way, an adjustable device for holding body parts during a surgical intervention can also be adapted to different patients and a holding and/or clamping device for use in device construction can be adapted to different workpieces.

The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings relating to the exemplary embodiments. Show it: | 1 several embodiments of a component according to the invention, FIG. 2 a further embodiment of a component according to the invention, FIG. 3 several arrangements of three components according to the invention, FIG. 4 details of an arrangement according to the invention.

A hollow-cylindrical component 1 made of steel and shown schematically in an isometric view in Fig. 1a has an elliptical end face 3 on a first end face 2 and a circular end face 5 on a second end face 4 22.5 ° inclined to the longitudinal axis 6, the end face 4 perpendicular to it. A plurality of identical webs 7 protrude perpendicularly from each end face 2, 4 and extend in the radial direction from an outer side 8 to an inner side 9. Each of the webs 7 is designed as an equilateral triangle 10 in cross section, with both a web width 11 and a web height 12 decreasing from the outside 8 to the inside 9 . For reasons of clarity, not all webs 7 are provided with a reference number in FIG. The component 1 shown in FIG. 1a can be produced by dividing a hollow cylinder blank (not shown in FIG. 1) with a circular base into two parts, with miter cuts being made on pages 6/9. The webs 7 are introduced into the two end faces 2, 4 by means of subtractive metalworking processes known to those skilled in the art.

A hollow-cylindrical component 1 made of steel and shown schematically in an isometric view in Fig. 1b differs from that shown in Fig. 1a in that both end faces 2, 4 are elliptical and at an angle of 22.5° to the longitudinal axis 6 are inclined.

A hollow-cylindrical component 1 made of steel and shown schematically in an isometric view in FIG. 1c differs from those shown in FIGS. 1a and 1b in that the component has a square cross section. End faces 2, 4 arranged obliquely to the longitudinal axis 6 are rectangular.

A hollow-cylindrical component 1 made of steel and shown schematically in FIG. 1d in an isometric view differs from those shown in FIGS ordered end faces 2, 4 has.

Reference is now made to FIG. 2, where the same or equivalent parts are denoted by the same reference number as in FIG. 1 and the letter a is added to the relevant reference number.

A hollow-cylindrical component 1a made of steel shown schematically in an isometric view in FIG. 2 differs from that shown in FIG. FIG. 2 also shows, by way of example, how a web height and a web width can increase as the distance from the longitudinal axis 6a increases.

For reasons of clarity, not all webs 7a are provided with a reference sign in FIG. Reference is now made to Fig. 3, where the same or equivalent parts are denoted by the same reference numerals as in Figs. 1 and 2 and the relevant reference numeral is followed by the letter b in each case. page 7/9

In an isometric view shown in FIG. 3a, a straight arrangement 14 consisting of three fosse hollow-cylindrical components 1b made of steel, end faces 2b that abut one another are elliptical and arranged at an angle of 22.5° to the respective longitudinal axis 6b.

For reasons of clarity, not all webs 7b are provided with a reference number. Furthermore, no holding means is shown in FIG. 3 by which the webs 7b of the components 1b are held in an engaged position under load.

An arrangement 14 shown in FIG. 3b in an isometric view and consisting of three hollow-cylindrical components 1b made of steel differs from that shown in FIG. 3a in that it forms a 90-degree angle piece. An arrangement 14 made of three hollow-cylindrical components 1b made of steel, shown in FIG. 3c in an isometric view, differs from that shown in FIGS. 3a and b in that an offset piece is formed in which the longitudinal axes of outer components 1b are not coaxial, but parallel and offset in height. The embodiments shown in FIG. 3 are examples of possible arrangements. It goes without saying that a greater number than three components can form an arrangement.

Reference is now made to Fig. 4, where the same or equivalent parts are denoted by the same reference numerals as in Figs. 1 to 3 and the relevant reference numeral is followed by the letter c in each case.

An arrangement 14c of three hollow-cylindrical components 1c, shown in FIG. 4 in a partially sectioned side view, has a strand-like holding means designed as a steel cable 15, through which webs of the components 1c (not shown in FIG. 4) are in an engaged position when loaded are held and which extends through their interior. The steel cable 15 is passed through pressure plates 18, 19 at the ends 16, 17 of the arrangement 14c. The pressure plates 18, 19 are abutments for a clamping lever 20 and an end piece 21 and lie against open end faces of external components 1c. By actuating the tensioning lever 20, the steel cable 15 is tensioned so that the components 1c are pressed against one another and the webs are held in the engaged position.

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To release the connection, the clamping lever 20 is actuated in such a way that the steel cable 15 SE is free of tension. The components 1c can now be moved in the axial direction. By rotating individual components 1c about their longitudinal axis, a different spatial arrangement can be adopted, which can be fixed by actuating the clamping lever 20.

The arrangement 14c shown in FIG. 4 corresponds to a simple measuring stand with two joints. Although not shown in any of the figures, it is conceivable that webs 7-7b can be flattened on an upper side, ie on a side facing an adjacent component. It goes without saying that all combinations of features of the embodiments shown in FIGS. 1 to 4 are conceivable. For example, a component shown in FIG. 3 can have webs according to the embodiment shown in FIG. 2, or an arrangement 14 shown in FIG. 3c can be formed from components 1 according to FIG. 1d.

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Claims (14)

Patent Claims: 1. Hollow-cylindrical component (1-1c) for forming a detachable connection with at least one further component (1-1c) which has a connecting means on at least one end face (2, 4; 2a, 4a), characterized in that the connecting means of the end face (2, 4; 2a, 4a) includes protruding webs (7- 7b). 2. Component according to claim 1, characterized in that each web (7-7b) extends in the radial direction. 3. Component according to Claim 1 or 2, characterized in that a web width increases with increasing distance from the longitudinal axis (6-6b) of the hollow-cylindrical component (1-1c). 4. Component according to one of claims 1 to 3, characterized in that a web height increases with increasing distance from the longitudinal axis (6-6b) of the hollow-cylindrical component (1-1c). 5. Component according to one of claims 1 to 4, characterized in that web flanks (13) are at least partially parallel or oblique to the longitudinal axis (6-6b) of the hollow-cylindrical component (1-1c). 6. Component according to one of Claims 1 to 5, characterized in that a web side of the webs (7-7b) facing an adjacent component is flattened. 7. Component according to one of claims 1 to 6, characterized in that several webs (7-7b) are arranged next to one another in the circumferential direction and 0102627 a distance between adjacent webs with increasing distance from the longitudinal axis (6- 6b) of the hollow cylindrical Component (1-1c) increases. 8. Component according to one of Claims 1 to 7, characterized in that the at least one end face (2, 4; 2a, 4a) is arranged obliquely or perpendicularly to the longitudinal axis (6-6c) of the component, with an obliquely arranged end face (2nd -2b) is preferably at an angle of 22.5° or 45° to the longitudinal axis (6-6c). 9. Component according to one of claims 1 to 8, characterized in that a web-free connecting means is provided on one of the first end face (2, 4; 2a, 4a) opposite end face, which is used to form a non-positive and/or positive connection with a another component is set up. 10. Arrangement of at least two detachably interconnected, hollow-cylindrical components (1-1c) according to one of Claims 1 to 9, in which webs (7-7b) of a connecting means of the components are brought into engagement with one another and are secured by a holding means (15) in be held in an engaged position. 11. Arrangement according to claim 10, characterized in that the holding means (15) is in the form of a strand, is preferably arranged within the detachably interconnected components (1-1c) and extends through all interconnectable components (1-1c). 12. Articulated measuring stand (14c), which comprises a plurality of hollow-cylindrical components (1-1c) according to one of claims 1 to 9, with adjacent components (1-1c) forming a joint. 13. An adjustable device for holding body parts during a surgical procedure, comprising a plurality of hollow cylindrical components (1-1c) according to any one of claims 1 to 9. Page 2/3 . . ; . LU102627 14. Holding and/or clamping device for use in device construction, which comprises a plurality of hollow-cylindrical components (1-1c) according to one of claims 1 to 9. Page 3/3