• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A rotary tool extends in the direction of an axis of rotation and includes a carrier having a coupling receptacle disposed at an end face, the carrier having a carrier cross section. The coupling receptacle is delimited in the entire region of the carrier cross section by an outer web having an end face forming a planar bearing area. The coupling receptacle is delimited by side walls which extend step-free from the bearing area to a bottom area and include a pair of opposing clamping segments extending in the circumferential direction and a pair of opposing torque segments arranged at an angle thereto. The tool also includes a cutting head exchangeably fastened to the carrier, the cutting head having a coupling pin disposed in the coupling receptacle. At least one of the pairs of segments is oriented inclined in relation to the axis of rotation.
    公开号:SE1350028A1
    申请号:SE1350028
    申请日:2013-01-11
    公开日:2013-07-19
    发明作者:Juergen Schwaegerl；Berthold Zeug
    申请人:Kennametal Inc；
    IPC主号:
    专利说明:

    BACKGROUND OF THE INVENTION The present invention relates to a rotary tool having the features set forth in the preamble of claim 1 and to a cutting head having the features set forth in the preamble of claim 13. Such a rotating tool and such a splice head is described, for example, in WO 2007/107294 A1.
    The rotary tool is designed separately as a drilling tool and is composed of a carrier, which projects in the direction of an axis of rotation and on which a cutting head is interchangeably attached to its front end surface. The connection between the cutting head and the bar takes place via a tool coupling, in which a coupling receiving device and a coupling pin engage each other.
    Generally, the coupling pin is arranged on the cutting head and the coupling receiving device is arranged on the carrier and they are designed to be complementary to each other, i.e. they have matching geometry.
    Tool couplings for such combination tools with replaceable cutting heads must fulfill several functions. First and foremost, they must have sufficient axial elongation protection, so that the splice head is not pulled out than the bar during work. Problems can occur in this regard especially during retraction of the drill when it is pulled out than the drilled tail. Furthermore, the tool coupling must ensure very precise centering of the cutting head in relation to the axis of rotation. Finally, the tool coupling must also be designed for the transmission of sometimes high torques from the bar to the cutting head.
    When it comes to the tool coupling according to WO 2007/107294 A1, the coupling pin has a bone-like, asymmetrical design and is designed as an elongate coupling pin which is completely enclosed by a life of the coupling receiving device. The asymmetrical transverse section designed as a bone and the enclosure by the circumferential life has the effect of enabling high torque transmission and at the same time achieving self-centering by expansion in both spirits. As for the axial pull-out protection, supplementary screws are provided.
    WO 1998/53943 describes tool couplings of a further type, in which the torque transmission surfaces project radially outwards. In addition, when it comes to the described tool coupling, a central, additional coupling pin is provided, which is designed in such a way that it is offset from the torque surfaces. The coupling pin is screwed into a corresponding pin receiving device during assembly, whereby a salmon tail connection with a shape fit in the shaft direction is formed.
    The known coupling systems have the disadvantage that complex geometries and / or complementary means are required for the establishment of the three main functions mentioned, axial fastening, torque transmission and centering.
    OBJECT OF THE INVENTION Against this background, the object of the invention is to make it possible to obtain an improved tool coupling in which these three main functions are stored in a simplified form.
    Solution for achieving the object The object is achieved according to the invention with the aid of a rotating tool with the features set out in claim 1 and with the aid of a cutting head with the features set out in claim 13.
    The rotary tool comprises a carrier and a cutting head which is exchangeably fixed thereon, the carrier for this purpose having a coupling receiving device for a coupling pin of the cutting head and the coupling receiving device and the coupling pin being designed to be complementary to each other to form a tool coupling. The coupling pick-up device and the coupling pin thus have matching 3 geometry, especially true cross-sectional geometry. The bar has a bar cross section, which indicates the cross section areas in which there is material. Recesses due to span spaces thus lead to a barartar section that deviates from a circular shape. Preferably, the coupling receiving device in the entire area of the bar type section is delimited on the outer circumference of the bar, along a circular curve, by a radial outer life. This circumferentially forms the delimitation of the bar in the area of the coupling receiving device. The waist has a front end surface, which is directed towards the splice head and with its entire surface forms a flat base surface for the splice head. Life itself thus has no ledge steps, etc.
    The front surface that delimits it is completely within a plane.
    The coupling receiving device is laterally delimited by side cradles, which extend steplessly from the base surface to a bottom surface or a base of the coupling receiving device. The side cradles thus run in a straight line, without ledges or the like being arranged. Thus, seen in the direction of the axis of rotation, neither the coupling pick-up device nor the coupling pin has a geometry with steps, for example due to the formation of ledges.
    The side cradles then have in each case a pair of forming opposite clamp portions and a pair of forming opposite torque portions. Separately, the side cradles are formed by the two party pairs. The clamp portions thereby stack at least substantially in the circumferential direction and serve the radial centering of the splice head. This means that the clamping portions exert a radial force, directed towards the axis of rotation on the assigned surfaces of the cutting head, so that the opposite arrangement of the clamping portions has the effect that a centering takes place. Furthermore, the torque portions are arranged at an angle to the clamp portions, especially at an angle of about 900, and serve for the torque transmission. The torque portions also preferably have a centering effect due to their opposite arrangement. The torque portions thus also exert radial centering forces on the assigned surfaces of the cutting head.
    Furthermore, the portions of at least one portion pair, preferably the torque portions, are oriented so as to be inclined in relation to the axis of rotation to form a recess acting in the axial direction, i.e. in the direction of the axis of rotation. Therefore, at least in the area of the clamp portions and / or preferably also in the area of the torque portions, a type of salmon tail connection is formed for the axial attachment, the coupling pin being held in the coupling receiving device in a narrow fit. Before mounting, a relative movement of the coupling pin takes place in relation to the coupling receiving device, so that the mutually assigned portions of the coupling receiving device and the coupling pin are brought into engagement with each other. This is done by rotating the joint head about the axis of rotation. The torque portions are thus constructed in such a way that they form both the torque transfer function and the function for axial attachment of the cutting head in the clutch receiving device. Apart from the clamping function, the clamping parts have the same function for axial fastening. Preferably, the Dada party pair also serves at the same time to the radial centering due to their oblique design. Consequently, all three functions of a tool coupling, more specifically axial fastening, torque transfer and centering, are reliably achieved by the overall stepless design of the tool coupling together with a simple geometry of the coupling pin and the coupling pick-up device.
    Usually, span spaces are prepared in the bar. In a preferred design, the life is divided into a pair of forming opposite life portions and the torque portions are oriented in such a way that they protrude into the span spaces. The particular advantage of this variant can be seen in the fact that the life width of the body increases along the torque portion towards the span thin, so that the life is very massive, and consequently robust, designed in the area of the torque portions.
    The life portions preferably have at least in the area of the clamp portions a lobe portion which extends towards the span space and thus - when a helical span space - extends partly over the span space, that is to say protrudes into the span space. Seen in the direction of the axis of rotation, the lobe portion was thus not completely made of material. This design has the effect that the clamping portions have comparatively high elasticity and consequently form a pair of projecting clamping lobes, which exert radial forces like a pair of pliers. When the coupling pin is inserted, a somewhat elastic radial expansion takes place in the outward direction.
    Investigations have shown that, with such a design, and in cooperation with the torque portions, an extremely high axial pull-out protection is achieved, and at the same time a suitable fit for the cutting head on the base surface of the scissors. The radial "scattering" has the effect that forces within the life portions are introduced and deflected and leads to additional radially ineffective force components being generated in the area of the torque portions. Due to the salmon tail design, these additional force components generate an additional axial tightening component, and consequently a pressing force against the base surface.
    In a breathable design, the clamp portions also extend in each case to a span space. Their substantially angular arrangements - in which the horn regions are formed by a rounded part - have the effect that the torque portions and the clamp portions define a rectangular geometry. Due to the span spaces, diagonally spaced paths, especially circular segments, are cut out of this geometry.
    The life of the coupling receiving device is thus the tip towards the span spaces, so that the cutting head can be braced with its coupling pin into the coupling receiving device first slightly twisted and then can be fastened therein by rotation.
    As an alternative to this interruption of the life by means of the span spaces, according to a preferred second embodiment variant it is arranged that an insertion opening, through which the coupling pin can be inserted into the coupling receiving device radially along an insertion direction, is preferably formed only in the area of one of the two clamps. In the rest of the area, life is designed all the way around the perimeter, that is to say, it is not interrupted even by the span spaces. When applicable, this embodiment variant is instead peripherally interrupted in the area of the bar type warp section to form the insertion opening. Mounting takes place by the coupling pin being guided radially through the insertion opening, perpendicular to the axis of rotation, and then rotated within the coupling receiving device to form the salmon tail connection.
    Accordingly, it is arranged so that the side cradles have additional guide portions, which extend in the insertion direction and in each case connect to the torque portions at an angle which is in particular an obtuse angle. The angle is then preferably greater than 10 and less than 180 °. Unlike the first embodiment variant, in which the life portions in respective cases consist of a clamping portion and a torque portion, this embodiment variant thus has an additional guide portion, which forms a control function for the insertion of the coupling pin, but is no longer in contact with the one finally mounted. made with the coupling pin inford.
    In both embodiments, the torque portions - when seen in a cross-sectional plane perpendicular to the axis of rotation - extend in a straight line, i.e. the torque portions extend parallel to a center axis extending perpendicular to the axis of rotation and intersecting it. The center axis in this case is also oriented in such a way that, in the area of the bottom of the receiving device, it is preferably tangentially oriented in relation to the chip spaces.
    It is also preferably so arranged when it comes to both design variants that a width of life increases, from the clamp portions, in the area of the torque portions, in order to have sufficient material available for a torque transmission. When it comes to the first embodiment variant, the life width increases continuously, so that the largest life width is at the spirit of the torque portion.
    In a preferred embodiment, the side cradles are oriented in such a way that they are inclined in relation to the axis of rotation in the whole area, i.e. both in the area of the clamp portions and in the area of the torque portions, to form an undercut acting in the axial direction. 7 In principle, there is the proximity of all the side cradles in the vicinity of one of the two pair pairs, especially in the area of the torque portions, in such a way that they are parallel or obliquely inclined in opposite directions relative to the axis of rotation, in order to avoid calving as far as possible. in the area for these pater as a result of the geometry. By tilting in opposite directions is meant a design which tapers from the cutting head towards the bar.
    Taken together, the torque portions and the clamp portions preferably define an approximately rectangular base geometry, and are thus arranged substantially perpendicular to each other.
    The specific advantage of the design described has to be seen in that apart from the torque portions no further means or surfaces are provided for the torque transmission. As a result, an overall simple design is possible. All torque portions are thus located inside the clutch pick-up device, that is to say it does not extend radially as far away as the outer circumference of the bar. To the extent that the torque portions are enclosed by life.
    With this design, the advantage is also obtained that no additional centering means exerting a radially directed force on the coupling pin are arranged. At most, information aids can be provided. Thus, for centering, there is no need for either screw elements or an additional centering pin which connects in the axial direction, which is usually designed conically in relation to the centering, so that radial centering forces act.
    In a breathable development, the coupling pin is complementary to the coupling receiving device in relation to the rotation axis inclined portions of respective portion pairs, the angle of inclination of which is different from that of the clamp portions and torque portions of the coupling receiving device. As a result, a defined reciprocal abutment of the assigned parties is ensured. The associated splice head is designed to be complete with the coupling receiving device and generally has a main transverse section. The cross-sectional area in turn delimits the surface areas in which material is present. The coupling pin projects from a flat sun defining a main base surface for flat abutment on the base surface of life. The coupling pin is thus at its foot surrounded by the main base surface. Furthermore, the coupling pin is delimited by a circumferential side cradle, which extends steplessly from the main base surface of Iran to a flat bottom surface. The side cradle in this case has a pair of forming opposite clamp portions and a pair of forming opposite torque portions and is formed separately by these pairs. The clamp portions thereby extend at least substantially in the circumferential direction and serve the radial centering of the splice head; the torque portions are arranged at an angle, especially approximately at a right angle, on the other hand and serve for the torque transmission. The side cradle of at least one of the part pairs, preferably the part pair, is also oriented in such a way that it is inclined in relation to the axis of rotation to form a salmon tail undercut.
    The torque portions and preferably also the clamp portions open in a different manner in the span groove, the torque portions and preferably also the clamp portions extending in a straight line.
    Description of the Figures Exemplary embodiments of the invention are explained in more detail below with reference to the drawings, in which: Fig. 1 is an exploded perspective view of a detail of a rotating tool with a bar and a splice head according to a first embodiment; Fig. 2 is a view of Fig. 2Brides a side view of the cutting head according to Fig. 2A, Fig. 2C is a side view rotating its 90 ° of the cutting head according to Fig. 2B, Fig. 3A is a side view of a detail of the bar according to the first embodiment. Fig. 3Brides a plan view of the front end surface of the bar according to Fig. 3A, Fig. 3C is a sectional view along section line 3C - 3C in Fig. 3B, Fig. 4A shows in section a detail in the area of the cutting head according to the first embodiment variant along section line 4A Fig. 4A in Fig. 4B, which is a front end view of the rotating tool, Figs. 5A-C are views of a splice head corresponding to the views in Figs. 2A-2C according to a second embodiment variant, Figs. 6A-C are opposite Figs. 3A-3C show views of the bar according to the second embodiment variant, Fig. 7A, shows a perspective view of a detail in the area for the cutting head of a third embodiment variant with an additional axial screw fastening, Figs. 8A-Cär to the views in Figs. 2A- Fig. 9C is a sectional view taken along the line 9C-9C of Fig. 9A; Fig. 9 is a sectional view taken along line 9C-9C of Fig. 9A; Fig. 9 is a sectional view taken along line 9C-9C of Fig. 9A; line 9D-9D in Fig. 9A, Fig. 9E shows a section along the line 9E-9E in Fig. 9A.
    Description of the Exemplary Embodiment In the exemplary embodiments, parts operating in the same manner have the same reference numerals.
    The rotary tool 2, a detail of which is shown in Fig. 1, is in the exemplary embodiment designed as a modular drilling tool. It comprises a carrier 6, which extends in the direction of an axis of rotation 4 and on the front end surface of which a coupling receiving device 8 is formed, into which a coupling pin 10 of a splice head 12 can be inserted into the spirit - and can be fastened. In the exemplary embodiment, the rotating tool 2 has two helical span grooves 14, which are formed in the body of the bar 6 and continue in the splice head 12, especially in such a way that the span space cradles are aligned from the bar 6 to the splice head 12 without any edges.
    The carrier 6 generally has a front corrugated row with the clamping spaces 14 and a rear clamping pin which connects thereto, which is not shown closer and with which it can be clamped into a tool receiving device of a corresponding machine tool.
    The end face of the bar 6 and the rear end face of the cutting head are designed to be complementary to each other to form a tool coupling. Below, the tool coupling elements on the bar side have the male designation "A" and those on the main side have the male designation "B".
    The design of the splice head 12 according to a first embodiment variant is now explained in more detail with reference to Figs. 2A - 2C: The coupling pin 10 extends in the direction of the axis of rotation 4 from a flat main base surface 16B, by means of which it is circumferentially enclosed and delimited at its foot. It has a main cross-sectional area 18B, which is defined by said cross-sectional area perpendicular to the axis of rotation 4, in which material is present. In the exemplary embodiment, the main transverse section surface 18B thus consists of a circular transverse section minus the recesses due to the chip spaces 14.
    In the entire area of the main base surface 16B, the splice head 12 is guided further forward, and thus has a certain head height, before the actual drilling tip is formed, with, for example, a conical ground surface.
    The coupling pin 10 is circumferentially defined by a side cradle 20B, which is formed in each case two opposite pairs formed by clamp portions 22B and torque portion pairs 24B. The two portions 22B, 24B overlap in each case, respectively, to form a rounded portion. The opposite clamp portions 22B and the torque portions 24B extend parallel to each other in each case.
    The portions 22B, 24B extend in each case to a respective span space 14. The portions 22B, 24B are oriented approximately perpendicularly in relation to each other, so that they approximately define a rectangular basic geometry. At the lower outer end of the coupling pin 10, this is delimited by a flat bottom surface 26B, from which only a cylindrical insertion pin 28B projects centrally. This insertion pin 28B only serves as an insertion aid when the cutting head 12 is mounted in the coupling receiving device 8. Its diameter is only about (:) / 0 to 15% of a nominal drilling diameter.
    In the case of the preferred first embodiment shown in Figs. 2A - 2C, both the clamp portions 22B and the torque portions 24B are oriented so as to be obliquely inclined in relation to the axis of rotation 4 with an inclination angle α1, which is, for example, in the range between 0 and 20 °. The coupling pin 10 is thus generally approximately conically shaped and tapers in the direction of the drill bit.
    In the transition area from the coupling pin 10 to the main base surface 16B or the bottom surface 26B, rounded parts or chamfers are designed in each case, especially for reducing calving force in the transition to the main base surface 16B and enabling simple insertion into the coupling receiving device 8.
    As can be seen in particular from the plan view in Fig. 2A, the respective clamping portion 22B extends approximately in the circumferential direction 30. The circumferential direction 30 is in this case opposite to the direction of rotation of the rotating tool, i.e. the direction in which the rotating tool 2 rotates when used as intended. When the cutting head 12 is viewed from the front, the direction of rotation is usually counterclockwise.
    In the area of the torque portions 24B, a width 32B of the main base surface 16B continuously increases Iran and clamp portion 22B, respectively. The width 32B is in this case defined by the radial distance between the circumferential surface of the splice head 12 and the side cradle 20B.
    The front end region of the bar 6, shown in Figs. 3A-3C, is designed to be complementary to the cutting head 12. The side views in Figs. 3A and 30 show only parts of the bar 6. In correspondence with the individual elements of the cutting head 12, the bar 6 has a flat base surface. 16A, a bar type section 18A, side cradles 20A, 12 claw portions 22A, rotating nonnet portions 24A, a bottom surface 26A, an insertion bore 28A, and also a width 32A. In the plan view in Fig. 3B, in addition, cooling water outlet 34 can also be seen in the chip spaces 14. In the selected representation, whereby the bar 6 is cut away, these outlets are shown as an open circular surface.
    As can be seen in particular from Fig. 3B, the clamp portions 22A extend parallel to a center axis 36, which crosses the axis of rotation 4 at right angles and - at the bottom surface 26A - forms a tangent to the cradle surfaces of the chip spaces 14.
    The clamp portions 22A and the torque portions 24A are inclined at an angle of inclination a2 relative to the axis of rotation, a2 being slightly larger than that shown separately in Fig. 4A. The difference between these two angles is, for example, in the range from 0.10 to 2.5 °.
    The situation in the joined state is shown in Fig. 4A. The splice head rests with its main base surface 16B flat and over the entire circumference of the base surface 16A. The obliquely inclined portions 22A, B and 24A, B have the effect that the cutting head 12 is held in the bar 6 on the salmon tail connection set.
    For mounting the coupling head 12, it is inserted with its coupling pin 10 into the coupling receiving device 8, the coupling pin 10 first being slightly rotated in relation to the coupling receiving device 8, until the two base surfaces 16A, B abut one another. Then, the cutting head 12 is rotated in the circumferential direction 30, so that the obliquely inclined portions 22A, B and 24A, B form the salmon tail undercut. The circumferential direction 30 thus corresponds to an ice screwing direction, in the direction of which the cutting head 12 is screwed into the bar 6 during assembly.
    As can be seen in particular from the plan view in Fig. 3B, the receiving device 8 is enclosed in the entire area of the bar cross section 18A (circular cross section minus the recesses due to the span spaces 14), more precisely at the level of the base surface 16A, of a web 31, so that all passages 22A, 24A is centrally located inside and 13 is not guided radially to the outside. This applies in particular to the torque portions 24A. It can also be seen that the waist width 32A is continuously extended in the circumferential direction 30.
    In the area of the clamping portion 22A, the web 31 in each case extends into the span space 14, extends outwards and skis, in this projecting area, no longer completely made of material in the direction of the axis of rotation. This protruding area is called a lobe portion 33.
    During screwing in of the coupling pin 10, the opposite lobe portions 33 expand somewhat elastically, so that they exert a radial force component on the coupling pin 10.
    With the chosen design, the special orientation of the torque portions 24A, and especially their design for forming a salmon tail undercut, can be seen as a special advantage. In the region of the clamp portions 22B, the coupling pin 10 generates a radially extending force which, by deflection within the web 31, unexpectedly generates a radially inertial force in the torque portions 24A. The salmon tail-like design thereby has the effect that an additional tightening torque is also exerted in the axial direction, so that the main base surface 16B is pressed against the base surface 16A. In addition, this has the effect that the centering effect is also improved in the area of the torque portions 24B.
    Despite the intensity of the transmitted torque forces in the area of the torque portions 24B, the obliquely inclined design is thus in favor of forming the salmon tail undercut also in the area of the torque portions.
    This further compensates for a calving action which may be induced by this inclined layer in the transition area Than the coupling pin side cradle 20B 10 to the main base surface 16B. In this respect, the first embodiment variant, shown in Figs. 1-4, is the preferred variant.
    In the case of the second embodiment variant, which is shown in Figs. 5 and 6, unlike in the first embodiment variant, there is no salmon tail undercut in the area of the torque portions 24B. In the exemplary embodiment of variant 2, they are inclined in opposite directions in opposite directions with an angle of inclination 131, 132, so that the non-rotating non-sectional portions 24A, 24B rotate conically in the direction of the axis of rotation 4 towards the bar 6. Otherwise, the embodiment variant according to Figs. 5 and 6 identical to the embodiment variant according to Figs. 1 to 4.
    When applicable, the design variants together provide reliable axial pull-out protection, sufficient torque transmission and a centering function by means of the comparatively simple coupling pin 10 and the coupling receiving device 8 comprising only one element. It should be emphasized that both the coupling pin 10 and the coupling receiving device 8 for these three functions have a simple, substantially rectangular basic cross-sectional area and that there are no displacements or ledge steps in the direction of the axis of rotation. No displacements or ledge steps are arranged in the circumferential direction either. Only in the central area is there the connecting insertion pin 28B, which, however, does not have a flawed effect as far as the three mentioned functions are concerned; above all, it also does not assume a flagon centering function in the sense of very accurate centering, which is only possible by the action of radial forces on the coupling pin 10. Similarly, the insertion pin 28B is thus also provided with cylindrical side surfaces which extend parallel to the axis of rotation 4.
    The basic geometry of the tool coupling can thus be generally described, for example, by an approximate steering block-shaped basic body element, in which the side cradles are designed in such a way that they are inclined. The basic body is thus designed entirely as a truncated pyramid, with a rectangular base surface and a cross-sectional surface perpendicular to the base surface formed by a preferably symmetrical parallel trapezoid. This base body (both on the side of the coupling receiving device 8 and on the side of the coupling pin 10) extends in each case from a flat surface 16B, A and ends on a flat surface 26A, B. This basic block-shaped geometry is enclosed by the web 31, apart from the area in which form the span spaces 14, which cut out cylindrical or elliptical paters from the steering wheel block-shaped geometry.
    In principle, this tool coupling also has the advantage that the axial pull-out protection is sufficient without additional additional axial fastening means. This grids especially when grating relatively small nominal diameters of the bar 6, for example down to 25 mm. This in particular prevents the presence of further weakening of the bar core. This problem is less relevant when it comes to larger diameters. In addition, large non-linear diameters over 20 or 25 mm screws 38 may also be provided for the axial pull-out protection, as shown in the third exemplary embodiment in Figs. 7A, 7B.
    A further, fourth embodiment variant is shown in Figs. 8A-8C and Figs. 9A-9E. Unlike in the previously exemplary embodiments, the longitudinal direction of the coupling pin 10 and the coupling pick-up device 8 (which runs transversely to the axis of rotation) does not extend further from the span space 14 to the span space 14, but extends substantially between these span spaces, so that neither the coupling pin 10 nor the coupling receiving device in the span space. In the stable, the coupling receiving device 8 is enclosed almost completely by the web 31, and only in the area of one of the two clamping portions 22B is a insertion opening 40 formed; thus, life 31 is interrupted.
    The width of this insertion opening 40 in this case corresponds to the width of the coupling pin, so that it enables the coupling pin 10 to be pressed into the coupling receiving device 8 perpendicular to the axis of rotation 4 in an insertion direction 42, which approximately corresponds to the longitudinal direction of the coupling receiving device 8. For this purpose, a pair of forming guide portions 44 are provided, along which the coupling pin 10 slides and is guided during insertion. Subsequent rotation in turn has the effect that the salmon tail undercut is formed between the clamp portions 22A, 22B and / or between the torque portions 24A, 24B. As shown in the exemplary embodiment, the salmon tail undercut is formed at all pads 22A, B, 24A, B.
    Also when this embodiment variant applies, all three functions, more specifically axial pull-out protection, centering action and torque transmission, are assumed only by means of the approximately thinned pyranide-shaped coupling pin 10 and the correspondingly designed coupling receiving device 8. Additional centering means are not required. . In comparison with the coupling pins 10 according to the previously exemplary embodiments, the coupling pin 10 also has a simplified design, since the chip spaces 14 do not cut out an area. The coupling pin 10 is thus designed as a simple truncated pyramid with rounded horns. In the case of this exemplary embodiment, the coupling receiving device 8 is preferably dimensioned in such a way that insertion of the coupling pin 10 in the direction of the axis of rotation 4 is not possible.
    According to an alternative embodiment variant which is not shown in more detail, the width of the coupling receiving device 8 is dimensioned in such a way that insertion of the coupling pin 10 in the direction of the axis of rotation 4 is possible. NI & it applies this variant there is preferably no insertion opening.
    权利要求:
    Claims (15)
    [1]
    1. wherein the carrier (6) on the front surface has a coupling receiving device (8) for a coupling pin (10) of the cutting head (12), 2. wherein the carrier (6) has a bar part cross section (18A), 3. wherein the coupling receiving device (8) is delimited especially in the entire area of the bar section (18A) by means of an outer web (31), 4. wherein the entire end face of the web (31) forms a flat base surface (16A) for the splice head (12), 5. wherein the coupling receiving device (8) is delimited by side cradles ( 20A), - the side cradles (20A) extending steplessly from the base surface (16A) to a bottom surface (26A), characterized in that the 6 side cradles (20A) have a pair of forming adjacent clamp portions (22A) and a pair of forming opposite torque portions (24A). ), - the clamp portions (22A) extend in the circumferential direction (30) and serve for radial centering of the cutting head (12), 7. the torque portions (24A) are arranged at an angle thereto and serve for the torque transfer, 8. at least one of the portion pairs (22A , 24A) is oriented on such set that it is inclined in relation to the axis of rotation (4) to form a undercut for axial extension protection.
    [2]
    A rotating tool (2) according to claim 1, characterized in that the bar (6) has chucking spaces (14), which divide the web (31), and in that the torque portions (24A) open into the chucking spaces (14).
    [3]
    Rotating tool (2) according to claim 2, characterized in that the area (31) of the clamping portions (22A) in each case has a lobe portion (33), which ends 18 at the span space (14) and - when viewed in the axis of rotation (4) ) direction - stacks over the span space (14).
    [4]
    A rotating tool (2) according to claim 1, characterized in that the web (31) is formed around the circumference and only in the area of one of the two clamping portions (22A) has a insertion opening (40), via which the coupling pin (10) can be passed into the coupling receiving device (8) radially along an insertion direction (42).
    [5]
    Rotating tool (2) according to claim 4, characterized in that the side cradles (20A) further have guide portions (44), which extend in the insertion direction (42) and in each case connect to torque portions (24A).
    [6]
    A rotating tool (2) according to any one of the preceding claims, characterized in that the torque portions (24A) - in a section plane perpendicular to the axis of rotation (4) - stack in a straight line.
    [7]
    A rotating tool (2) according to any one of the preceding claims, characterized in that, from the clamp portions (22A), a width (32A) of the web (31) is plowed in the area of the torque portions (24A).
    [8]
    Rotating tool (2) according to any one of the preceding claims, characterized in that the side cradles (20A) are oriented in such a way that they are inclined in relation to the axis of rotation (4) in the whole area to form a undercut.
    [9]
    A rotating tool (2) according to any one of the preceding claims, characterized in that the torque portions (24A) are oriented perpendicular to the clamp portions (22A).
    [10]
    A rotary tool (2) according to any one of the preceding claims, characterized in that apart from the pair of torque forming portions (24A) no further means or surfaces are provided for the torque transmission. 19
    [11]
    A rotating tool (2) according to any one of the preceding claims, characterized in that apart from the clamping portions (22A) and the torque portions (24A) no further centering means exerting a radially acting force on the coupling pin (10) are provided.
    [12]
    A rotating tool (2) according to any one of the preceding claims, characterized in that the coupling pin (10) has to the coupling receiving device (8) complementary pairs of forming pads (22B, 24B) which are inclined in relation to the axis of rotation (4), the angle of inclination (a1 ) is separate from the portions (22A, 24A) of the pair of coupling receiving device (8).
    [13]
    Cutting head (12), especially for a rotating tool (2) according to any one of the preceding claims, 1. which has a main transverse section (18B), - which has a coupling pin (10) on the face, 2. the coupling pin (10) is surrounded of a main base surface (16B) for planar abutment on a base surface (16A) of the carrier (6), 3. the coupling pin (10) is defined by a side cradle (20B), 4. the side cradle (20B) extends steplessly from the main base surface (16B) to a bottom surface (26B), characterized in that the 5. side rocker (20B) has a pair of forming opposite clamp portions (22B) and a pair of forming opposite torque portions (24B), the 6. clamp portions (22B) extend in the circumferential direction (30) and serve to the radial centering, - the torque portions (24B) are arranged at an angle thereto and serve for the torque transmission, 7. at least one of the part pairs (22B, 24B) is oriented in such a way that it is inclined relative to the axis of rotation (4) to form of an undercut for axial extension protection.
    [14]
    A splice head (12) according to claim 13, characterized by chip spaces (14), in which the torque portions (24B) in each case open.
    [15]
    A splice head (12) according to claim 13 or 14, characterized in that the torque portions (24B) stack in a straight line. 1/4
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    同族专利:
    公开号 | 公开日
    SE537812C2|2015-10-20|
    DE102012200690A1|2013-07-18|
    JP6211769B2|2017-10-11|
    JP2013146854A|2013-08-01|
    CN103212735A|2013-07-24|
    US9050659B2|2015-06-09|
    CN103212735B|2017-04-26|
    DE102012200690B4|2021-06-17|
    US20130183112A1|2013-07-18|
    KR20130084996A|2013-07-26|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102012200690.7A|DE102012200690B4|2012-01-18|2012-01-18|Rotary tool and cutting head for such a rotary tool|
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