EP2767374A1 - Shaft milling device - Google Patents

Abstract

The shaft milling device (1) has a milling body (2), which rotates about an axis of rotation that extends from a proximal body side (21) of the milling body to a distal body side (22) of the milling body. The milling body is designed as an elongated milling arm (10a,10b), which extends outwards from the axis of rotation and is fitted with milling elements (14) over its longitudinal extension such that the milling edges of the milling elements form a whole milling edge leading away from the axis of rotation.

Description

TECHNICAL AREA

The present invention relates to a shaft milling device according to the preamble of claim 1 and their use for milling shaft openings, in particular in a road surface.

STATE OF THE ART

Quay milling machines are regularly used in the construction industry for the introduction of cutouts in road coverings for shafts. For this purpose, a milling tool with teeth is rotated via a drive shaft, whereby the teeth mill into the floor covering and thus provide an opening for a manhole cover.

The EP 1 182 299 A1 teaches a pit mill for free cutting a manhole cover bearing with a round, downwardly conically tapered, annular milling head, the conically tapered side surface is occupied by Fräsmeisseln and whose lower annular edge carries additional Fräsmeissel. In the cutout, the manhole cover is then fitted with a mortar.

The WO 2011/047133 A2 and the US 4,968,101 shows a pit mill, which is a drill bit-like training with arranged at the end face cutting for the rotational development of flat surfaces of a coating. The cutting edges of these core drilling elements are provided by a plurality of teeth arranged on a circle, which is suitable for free-milling a shaft opening.

However, these mills have the disadvantage that a diameter of the cutout is not adjustable.

The WO 2005/085536 A1 also shows a milling device with a drill core drill bit for the free-cutting of manhole openings. Here, a plurality of support elements is screwed laterally onto the core drilling element with mounting plates with additional teeth, whereby a diameter of a cutout is customizable. However, such an adaptation is only cumbersome and can be achieved by replacing all the carrier elements by other carrier elements and also a center of the core core lying lying pad area is not milled.

PRESENTATION OF THE INVENTION

It is therefore an object of the present invention to provide a shaft milling device for introducing a milling in a floor covering, which makes it easier and more convenient to adapt a diameter of the milling.

These and other objects are provided by a well milling apparatus having a mill body rotatable about a rotational axis extending from a proximal body side of the mill body to a distal body side of the mill body, the mill body on the proximal body side being a coupling member for operatively connecting to a shaft rotatable in the rotational axis and on the distal side of the body a plurality of cutting elements with Fräskanten is determined, achieved in that the milling body is formed as an elongated cutting arm, which extends away from the axis of rotation outwardly and can be fitted over its longitudinal extent with such milling elements that the Fräskanten the Milling elements form an away from the axis of rotation Gesamtfräskante.

The term "proximal" is in each case on the shaft side or "directed against the shaft", ie in the intended use of the device "top" meant, while "distal side" is a proximal side with respect to the axis of rotation opposite side.

It is an aspect of the invention to provide a milling device which is suitable for providing a preferably flat milling cutter, which can be formed by at least one milling arm rotating perpendicular to the axis of rotation, wherein the milling cutter mills all over and for introducing a shaft opening into a floor covering, in particular in an asphalt surface by means of cold milling is suitable.

It is preferred that the cutting arm is transverse to the axis of rotation and preferably lies in a plane perpendicular to the axis of rotation, which, for example, an L- or T-shaped device is specified. This transverse or perpendicular to the axis of rotation or shaft standing arm is at least advantageous in that a compact shaft milling device is provided with minimal material cost.

In a further development, the milling elements are arranged in a row extending in the longitudinal extension of the milling arm on the distal side of the arm. It is particularly preferred that the milled elements in only a single row, i. a longitudinal row are arranged, since so a Gesamtfräskante is provided with minimal material cost. In particular, the cutting elements with the hard material inserts are costly and optimally used with the aforementioned arrangement. Alternatively, it is also conceivable that the cutting elements are arranged in an area about a center line of the cutting arm or in a plurality of longitudinal rows along the Fräsarms.

It is further preferred that the milling elements are detected in at least one adapter plate, said adapter plate extending with a proximal edge side along the longitudinal extent of the Fräsarms and protrudes from the distal body side of the Fräsarms to a distal edge side of the adapter plate from the cutter arm and wherein the Milling elements at the distal edge side over a height of the adapter plate spaced from the cutter arm are detected. By means of these adapter plates, the cutting elements are lifted off the cutting arm, which allows the cutting arm protrudes in its geometry on the introduced milling. Thus, milling with different diameters can be introduced with the same milling arm depending on the adapter plate assembly. In addition, the cutting arm can protrude as well in its width and not only in its length on the cutting elements and be designed to be stable. Over a height of the adapter plates in the direction of the axis of rotation is then a maximum milling depth certainly.

Preferably, the said height of the adapter plate in the direction of the axis of rotation is 5 to 50 centimeters, preferably 10 to 40 centimeters and in particular 15 to 30 centimeters and particularly preferably substantially 20 centimeters.

It is preferred that a plurality of individually detectable on the cutting arm adapter plates are provided, which are determined individually disassembled in a row in the longitudinal direction of the Fräsarms. Thus, individual plates can be dismantled and thus the geometry of the Frästellers be adapted. The geometry of the milling can be designed as a solid disc with selectable diameter or as a circular ring with selectable inner and / or outer diameter.

In a particularly preferred embodiment, the adapter plates protrude substantially perpendicular in the direction of the axis of rotation of the milling arm. It is conceivable that the adapter plates instead are at an angle to the axis of rotation and in the direction of the circular movement or in the radial direction. By the first, a power transmission to the arm and the shaft can be optimized, and secondly, a maximum diameter of the resulting burr can be increased.

Each adapter plate preferably carries at least one milling element, preferably two to five and in particular three milling elements. Three cutting elements allow the use of a stable, because areal adapter plate for several cutting elements.

It is further preferred that the cutting elements are each determined such that the individual milling edges of the cutting elements is substantially perpendicular to the direction of movement of the respective milling element upon rotation of the cutting arm about the axis of rotation. This ensures a symmetrical force and transmission to the adapter plate and the shaft.

Preferably, the milling edge is inclined with respect to the preferably planar milling cutter by 5 to 30 degrees, in particular by 10 to 20 degrees and particularly preferably by approximately 15 degrees, wherein the edge forms the distal end in the radial direction against the axis of rotation.

It is preferred that the milling edge along the milling edge spaced teeth, said teeth are preferably formed of a hard material, in particular of a tungsten alloy. Preferably, these teeth are free ends of hard material platelets, which are detectable in corresponding recesses of the cutting elements and thus easily replaceable as a consumable material.

It is also preferred that the milling elements are fixed at an angle such that their milling edges each form a distal end of the shaft milling device in the direction of the axis of rotation.

It when the Gesamtfräskante and preferably also the Fräsarm and / or the adapter plate (s) are formed in a plane transverse to the axis of rotation plane, wherein a curvature preferably forms a circular segment with a center angle of 5 to 60 degrees. Due to the circular segment training, the adapter plates can have the same curvature regardless of their radial position, which simplifies their production. The curvature of the Gesamtfräskante causes a wake of armendseitigen milled elements, which counteracts a tilting movement in the case of hooking a milling element in the floor covering.

It is preferred that the cutting arm on the distal side of the body has a preferably disassembled and projecting in the direction of the axis of rotation Zentrierspitz having a free tip for Erstkontaktieren the floor covering, said tip is located in the axis of rotation and projects beyond the distal ends of the cutting elements in the direction of the axis of rotation ,

Furthermore, it is advantageous if at least two cutting arms, which lead away from the axis of rotation and preferably project radially, are provided in preferably diametrically opposite directions. It can also be provided three or more cutting arms, which are then preferably disassembled individually for inspection, transport or storage purposes and circumferentially preferably uniformly distributed around a central element with the coupling element.

In a particularly preferred embodiment, exactly two cutting arms are provided, which lead away in diametrically opposite direction from the axis of rotation and having Gesamtfräskanten which are curved in a plane transverse to the axis of rotation opposite curvature, preferably the milling arms follow the curvature of the Gesamtfräskante.

The shaft milling device according to the invention is preferably used for introducing a manhole opening into a floor covering, in particular into a road or asphalt, concrete or ballast covering or similar coverings.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine perspektivische Ansicht einer bevorzugten Ausführungsform der erfindungsgemässen Schachtfräsenvorrichtung mit Zahnelementen;

Fig. 2

eine perspektivische Ansicht einer weiteren bevorzugten Ausführungsform mit einer Aufnahme für einen Bohrspitz;

Fig. 3

einen vergrösserten Ausschnitt auf einen Mittelbereich der Schachtfräsenvorrichtung gemäss Fig. 2.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

a perspective view of a preferred embodiment of the inventive Schachtfräsenvorrichtung with tooth elements;

Fig. 2

a perspective view of another preferred embodiment with a receptacle for a Bohrspitz;

Fig. 3

an enlarged section on a central region of the shaft milling device according to Fig. 2 ,

DESCRIPTION OF PREFERRED EMBODIMENTS

FIG. 1 The shaft milling device 1 comprises a cutter body shaped as a rocker 10 with two milling arms 10a and 10b projecting diametrically relative to a rotation axis 3 with a multiplicity of adapter plates 16 fixed distally on the milling arms 10a, 10b by itself free ends 21 of the Adapter plates 20 subsequent cutting elements 14 are provided, further provided a proximally attached to the rocker 10 coupling element 12 is provided.

About the coupling element 12 is a drive shaft (not shown) for rotational operation under Frästellerbildung the device 1 can be connected, whereby the coupling element 12, the rotation axis 3, which is perpendicular to the Fräsarmen 10 a, 10 b defined.

The rocker 10 has a length between the free ends of the cutting arms 10a, 10b of about 100 to 150 centimeters, in particular 135 centimeters, and a width of 10 to 20, in particular 15 centimeters, on. The two cutting arms 10a and 10b are curved in a diametrically opposite direction partially circular in a plane perpendicular to the axis of rotation 3 and joined together, wherein the cutting arms 10a, 10b form a plane perpendicular to the rotation axis 3 in said plane S-shape.

This S-shaped rocker 10 is integrally cut from steel and forms the swingarm floor 110. Curvature radii of the cutting arms 10a and 10b are the same and are 50 to 120 centimeters, preferably 60 to 100 centimeters and in particular about 67.5 centimeters. The rocker 10 has a rocker floor 110 and on the rocker floor 110 proximally mounted legs or halflings 11 a, 11 b. The halflings 11a, 11b are preferably made of bent steel and protrude in the direction of the shaft from the proximal body side 21 of the rocker 10, the halflings 11a, 11b follow the S-shape of the rocker 10. Thus, the rocker 10 has a substantially U-shaped cross-sectional shape.

The halflings 11a, 11b are firmly welded to the swinging floor 110, which is about 1.5 to 3 centimeters thick, and protrude with free end sections perpendicularly over 2 to 10 centimeters from the swinging floor 110. Furthermore, the halflings 11a, 11b extend over the entire longitudinal extension of the rocker 10 and have the same S-shape as the rocker bottom 110. The Halblinge 11 a, 11 b are arranged slightly offset from the center of the width of the swing base 110, so that the outer side protrudes about 1 centimeter wide paragraph from the swinging floor 110. Thus, the halflings 11a, 11b reinforce and stiffen the rocker floor 110, thus providing stable cutting arms 10a, 10b are provided.

Centered with respect to the longitudinal extent and width of the rocker bottom 110, the coupling element 12 is provided on the proximal side 21 between the halflings 11a, 11b. This coupling element 12 protrudes between the halflings 11a, 11b arranged beyond this. The coupling element 12 is cylindrical and extends substantially over a clear width between the halflings 11a, 11b. The coupling element 12 is arranged centrally between the milling arms 10a and 10b, subdivides the rocker 10 into the two arms 10a, 10b and defines the axis of rotation 3. Furthermore, the coupling element 12 has a suitable recess 121 which allows the coupling with the drive shaft. In the embodiment according to FIG. 1 this recess 121 is designed cuboid for positive engagement with a counterpart.

Centered between the halflings 11a and 11b is a plurality of longitudinally disposed and continuous mounting holes 15 in a row. About these holes 15 formed as band segments adapter plates 16 individually to the halflings 11 a, 11 b opposite distal side 22 can be fastened.

Along the S-shaped center line of the rocker 10 are adapter plates 16 via the mounting holes 15 by means of screw disassembled detected. The detected adapter plates 16 respectively contact the distal body side 22 of the rocker 2 with a proximal edge side 161 following said center line and protrude in the direction of the rotation axis 3 with free ends with a distal edge side 162. Due to the circular curvature of the S-shape of the rocker 10 identically shaped adapter plates 16 can be strung together along the center line directly to each other. The adapter plates 16 have a Abragungshöhe in the direction of the axis of rotation 3 of about 20 centimeters. A thickness of the preferably made of steel adapter plates 16 is about 2 to 5 centimeters, in particular 2.5 to 3.5 centimeters, more preferably about 3 centimeters.

As in FIGS. 2 and 3 can be seen, each adapter plate 16 carries on its distal edge side 162 three cutting elements 14, which are so firmly attached to the adapter plate 16, preferably welded or soldered, that a proper milling of road surfaces is possible. In Fig. 1 the milled elements 14 are not shown on the adapter plate 16 of the arm 10b. The cutting elements 14 have a substantially rectilinear milling edge 140, which is provided with teeth 15 extending along the edge 140. The preferably four teeth 15 per milling edge 140 are formed by molded from a hard material platelets, which are inserted into the cutting element 14 and thus easily replaceable. Preferably, these platelets are of tungsten or a suitable tungsten alloy.

The cutting elements 14 are secured to the distal edge side 162 such that the cutting elements are angularly rotated relative to the axis of rotation 3, i. projecting in the direction of the circular movement and the milling edges 140 form a (at least local) distal end of the shaft milling device 1, the milling edges 140 of all the cutting elements 14 taken together forming the total cutting edge 140.

The overall cutting edge 142 follows the S-shape of the rocker 10. The milling edge 140 lies in each case essentially transversely to the direction of movement of the milling element due to the shaft-activated rotation about the rotation axis 3. With respect to the milling cutter formed by the rotation of the milling device 1, the milling edge 140 is in each case at an angle an angle of 5 to 30 degrees, preferably 10 to 20 degrees, and more preferably less than about 15 degrees. As a result, each cutting element 14 first contacts the floor covering to be milled with a leading tooth 15, preferably the tooth 15 next to the axis of rotation, whereupon the further teeth 15 are successively milled into the covering upon further lowering of the milling cutter 1. The total milling edge 142 is thus formed by the leading teeth 15.

The said S-shaped curvature, which is formed in the rocker 10, is found in the rocker bottom 110, in the halflings 11a, 11b, in the individual and the juxtaposed adapter plates 16 and in the Gesamträskante 142 again and serves to optimize the milling process. As a result of this curvature, the cutting elements 14 which lie radially in the center of the center engage in space in front of the cutting elements 14 located on the end of the arm in the floor covering. By this spatial displacement or by this caster in the tangential direction of the radially arranged cutting elements 14 is a tilting movement of the device 1 in the direction of the circular motion, wherein the tilting movement of a in the Flooring originates in the direction of the circular movement hanging milling edge 140, efficiently prevented.

It is understood that the adapter plates 16 are basically detectable in any radial position with respect to the axis of rotation 3 in the corresponding mounting holes 15. This is a variety of configurations of adapter plates 16 is conceivable, which then not only a solid disc with selectable diameter of the floor covering, but only a selectable annulus is ausfräsbar. This can be achieved, for example, by omitting the rotational axis near adapter plates 16.

The embodiment according to FIGS. 2 and 3 is a further development of the embodiment according to Fig. 1 in that a receptacle 13 for a centering or Bohrspitz (not shown) is provided. This centering point has a tip, which forms a (global) distal end of the device 1 and serves for targeted and pinpoint contact with the floor covering to be milled. The centering point is arranged distally between the milling arms 10a and 10b, for which purpose the adapter plates 16 have a corresponding recess.

Some alternative embodiments not shown in the drawings will now be described.

In a first embodiment, it is conceivable that the cutting arms 10a, 10b are not in one piece, as described above, are configured, but composed of individual to each other, for example. Attached via a screw Fräsarmabschnitte. This is advantageous because such a length of the cutting arms is customizable.

In a second development, the cutting arms are not transversely, ie perpendicular from the rotation axis 3, but at an angle in the distal direction. This then results in an angular and radially outwardly increasingly reinforced to the cutting elements 14 inclined proximal body side 21, the distal body side 22 may be transverse to the axis of rotation 3 or equal to the proximal body side 21 to the rotational axis 3. In the first case, then the adapter plates 16 described above are to be attached to the mill 1. In the second case, the height of the adapter plates 16 of the. To form a flat Frästellers

Remove rotation axis 3 to the outside.

In a further development, the milling arm 10a, 10b no half S-shape, or the rocker no S-shape, but the milling arm has an S-shape and thus the rocker a double-S-shape. It is understood that in particular longer cutting arms 10a, 10b can still have more than one or two half-oscillations. LIST OF REFERENCE NUMBERS 1 Slot milling device 12 coupling member 121 recess 2 milling body 13 Pickup for Bohrspitz 21 proximal body side of 10 14 milling element 22 distal body side of 10 140 milling edge 142 Gesamtfräskante 3 axis of rotation 15 teeth 16 adapter plate 10 wing 161 proximal edge side 10a, 10b milling arm 162 distal edge side 11a, 11b Halflings 110 swing floor

Claims (15)

Shaft milling device (1) having a milling body (2) which is rotatable about a rotational axis (3) extending from a proximal body side (21) of the milling body (2) to a distal body side (22) of the milling body (2),
wherein the milling body (2) on the proximal body side (21) has a coupling element (12) for operative connection with a shaft rotatable in the axis of rotation (3) and on the distal body side (22) a plurality of milling elements (14) with milling edges (140 ), characterized
in that the milling body (2) is formed as an elongated milling arm (10a; 10b) which extends outwardly away from the axis of rotation (3) and can be equipped with milling elements (14) over its longitudinal extent such that the milling edges (140) of the milling elements (14) form a Gesamtfräskante (142) leading away from the axis of rotation (3). Shaft milling device (1) according to claim 1, wherein the cutting arm (10) is transverse to the axis of rotation (3). A slot milling machine (1) according to claim 1 or 2, wherein the cutting elements (14) are arranged in a row extending in the longitudinal extent of the cutting arm (10a; 10b). A slot milling device (1) according to any one of claims 1 to 3, wherein the cutting elements (14) are fixed in at least one adapter plate (16), said adapter plate (16) extending with a proximal edge side (161) along the longitudinal extension of the milling arm (10a; 10b) and protrudes from the distal body side (21) of the milling arm (10a; 10b) to a distal edge side (162) of the adapter plate (16) from the milling arm (10a; 10b) and wherein the milling elements (14) at the distal edge side (162) over a height of the adapter plate (16) spaced from the Fräsarm (2) are detected. A slot milling machine (1) according to claim 4, wherein said height of the adapter plate (16) in the direction of the axis of rotation (3) is 5 to 50 centimeters, preferably 10 to 40 centimeters and especially 15 to 30 centimeters, and more preferably substantially 20 centimeters. Shaft milling device (1) according to claim 4 or 5, wherein a plurality of individually on the milling arm (10a; 10b) lockable adapter plates (16) are provided, which are determined individually disassembled in a row in the longitudinal direction of the Fräsarms (10a; 10b). Shaft milling device (1) according to one of claims 4 to 6, wherein the adapter plate (16) protrudes substantially perpendicularly in the direction of the axis of rotation (3). Shaft milling device (1) according to one of claims 4 to 7, wherein each adapter plate (16) carries at least one milling element (14), preferably two to five and in particular three cutting elements (14). A slot milling device (1) according to any one of claims 1 to 8, wherein the cutting elements (14) are each determined such that the individual Fräskanten (140) substantially perpendicular to the direction of movement of the respective milling element (14) during rotation of the Fräsarms (10a, 10b) is about the axis of rotation (3) and / or where the milling edge (140) with respect to a by the Gesamtfräskante (142) formed flat Frästellers by 5 to 30 degrees, in particular by 10 to 20 degrees and more preferably inclined by 15 degrees, such in that the edge forms the distal end in the radial direction against the axis of rotation (3). The well milling apparatus (1) according to claim 9, wherein the milling edge (140) has spaced apart teeth (15) along the milling edge (140), wherein these teeth (15) are preferably formed from a hard material, in particular a tungsten alloy. Shaft milling device (1) according to claim 9 or 10, wherein the cutting elements (14) are fixed at an angle such that their milling edges (140) each form a distal end of the shaft milling device (1) in the direction of the axis of rotation (3). Shaft milling device (1) according to one of claims 9 to 11, wherein the Gesamtfräskante (142) and preferably also the Fräsarm (10a; 10b) and / or the adapter plate (s) (16) in a direction transverse to the axis of rotation (10a, 10b) Level curved form, wherein a curvature preferably forms a circle segment with a center angle of 5 to 60 degrees. A slot milling apparatus (1) according to any one of claims 1 to 12, wherein the cutting arm (10a; 10b) on the distal body side (22) has a centering tip, preferably demountably fixed and projecting in the direction of the axis of rotation (3), with a free tip for initial contacting of the floor covering , wherein this tip lies in the axis of rotation (3) and projects beyond the distal ends of the cutting elements (14) in the direction of the axis of rotation (3). Shaft milling device (1) according to one of claims 1 to 13, wherein at least two in the opposite direction from the rotation axis (3) leading away and preferably radially transversely projecting cutting arms (10a, 10b) are provided. Shaft milling device (1) according to claim 14, wherein exactly two cutting arms (10a, 10b) are provided, which lead away in diametrically opposite direction from the axis of rotation (3) and which Gesamtfräskanten (142) having in a plane transverse to the axis of rotation (3 ) of opposite curvature, wherein preferably the cutting arms (10a, 10b) follow the curvature of the total cutting edge (142).

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